Repository: spf13/cobra
Pull request #323 (2016-08-17 22:02:54)

Refactor: move each license to its own file
Over time, the licenses file ([cobra/cmd/licenses.go](https://github.com/spf13/cobra/blob/7c674d9e72017ed25f6d2b5e497a1368086b6a6f/cobra/cmd/licenses.go#L1384)) has grown in length to the (perhaps) [unwieldy](http://www.merriam-webster.com/dictionary/unwieldy) count of 1,384 lines (so far).

Some new licenses might be added (#318). And two licenses have reported errors (#311, #322).

This (refactoring) PR merely moves each license to its own file (exactly), in order to ease working with each license.

There are no other changes.

Installation is successful; all the tests run fine.

Also, I tested all the license types by hand, including the default one (by commenting out `license` in my Corba configuration file). I then looked at all the generated `main.go` and `LICENSE` files, and they looked right.



Patch:
diff --git a/.travis.yml b/.travis.yml
index 6e84be5..42d1f57 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,11 +1,14 @@
 language: go
-go:
-  - 1.4.3
-  - 1.5.4
-  - 1.6.3
-  - tip
 
 matrix:
+  include:
+    - go: 1.4.3
+      env: NOVET=true # No bundled vet.
+    - go: 1.5.4
+    - go: 1.6.4
+    - go: 1.7.5
+    - go: 1.8
+    - go: tip
   allow_failures:
     - go: tip
 
@@ -16,3 +19,7 @@ before_install:
 script:
   - PATH=$PATH:$PWD/bin go test -v ./...
   - go build
+  - diff -u <(echo -n) <(gofmt -d -s .)
+  - if [ -z $NOVET ]; then
+      diff -u <(echo -n) <(go tool vet . 2>&1 | grep -vE 'ExampleCommand|bash_completions.*Fprint');
+    fi
diff --git a/README.md b/README.md
index b338a0e..0d5bbfb 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@ Many of the most widely used Go projects are built using Cobra including:
 * [Hugo](http://gohugo.io)
 * [rkt](https://github.com/coreos/rkt)
 * [etcd](https://github.com/coreos/etcd)
+* [Docker](https://github.com/docker/docker)
 * [Docker (distribution)](https://github.com/docker/distribution)
 * [OpenShift](https://www.openshift.com/)
 * [Delve](https://github.com/derekparker/delve)
@@ -157,12 +158,17 @@ In a Cobra app, typically the main.go file is very bare. It serves, one purpose,
 ```go
 package main
 
-import "{pathToYourApp}/cmd"
+import (
+	"fmt"
+	"os"
+
+	"{pathToYourApp}/cmd"
+)
 
 func main() {
 	if err := cmd.RootCmd.Execute(); err != nil {
 		fmt.Println(err)
-		os.Exit(-1)
+		os.Exit(1)
 	}
 }
 ```
@@ -313,12 +319,17 @@ In a Cobra app, typically the main.go file is very bare. It serves, one purpose,
 ```go
 package main
 
-import "{pathToYourApp}/cmd"
+import (
+	"fmt"
+	"os"
+
+	"{pathToYourApp}/cmd"
+)
 
 func main() {
 	if err := cmd.RootCmd.Execute(); err != nil {
 		fmt.Println(err)
-		os.Exit(-1)
+		os.Exit(1)
 	}
 }
 ```
@@ -337,6 +348,7 @@ package cmd
 
 import (
 	"github.com/spf13/cobra"
+	"fmt"
 )
 
 func init() {
@@ -663,7 +675,7 @@ command.SetUsageTemplate(s string)
 
 ## PreRun or PostRun Hooks
 
-It is possible to run functions before or after the main `Run` function of your command. The `PersistentPreRun` and `PreRun` functions will be executed before `Run`. `PersistentPostRun` and `PostRun` will be executed after `Run`.  The `Persistent*Run` functions will be inherrited by children if they do not declare their own.  These function are run in the following order:
+It is possible to run functions before or after the main `Run` function of your command. The `PersistentPreRun` and `PreRun` functions will be executed before `Run`. `PersistentPostRun` and `PostRun` will be executed after `Run`.  The `Persistent*Run` functions will be inherited by children if they do not declare their own.  These functions are run in the following order:
 
 - `PersistentPreRun`
 - `PreRun`
@@ -744,7 +756,7 @@ providing a way to handle the errors in one location. The current list of functi
 * PersistentPostRunE
 
 If you would like to silence the default `error` and `usage` output in favor of your own, you can set `SilenceUsage`
-and `SilenceErrors` to `false` on the command. A child command respects these flags if they are set on the parent
+and `SilenceErrors` to `true` on the command. A child command respects these flags if they are set on the parent
 command.
 
 **Example Usage using RunE:**
diff --git a/bash_completions.go b/bash_completions.go
index 5b3e855..a0d0402 100644
--- a/bash_completions.go
+++ b/bash_completions.go
@@ -10,8 +10,9 @@ import (
 	"github.com/spf13/pflag"
 )
 
+// Annotations for Bash completion.
 const (
-	BashCompFilenameExt     = "cobra_annotation_bash_completion_filename_extentions"
+	BashCompFilenameExt     = "cobra_annotation_bash_completion_filename_extensions"
 	BashCompCustom          = "cobra_annotation_bash_completion_custom"
 	BashCompOneRequiredFlag = "cobra_annotation_bash_completion_one_required_flag"
 	BashCompSubdirsInDir    = "cobra_annotation_bash_completion_subdirs_in_dir"
@@ -22,7 +23,7 @@ func preamble(out io.Writer, name string) error {
 	if err != nil {
 		return err
 	}
-	_, err = fmt.Fprint(out, `
+	preamStr := `
 __debug()
 {
     if [[ -n ${BASH_COMP_DEBUG_FILE} ]]; then
@@ -87,8 +88,8 @@ __handle_reply()
                 local index flag
                 flag="${cur%%=*}"
                 __index_of_word "${flag}" "${flags_with_completion[@]}"
+                COMPREPLY=()
                 if [[ ${index} -ge 0 ]]; then
-                    COMPREPLY=()
                     PREFIX=""
                     cur="${cur#*=}"
                     ${flags_completion[${index}]}
@@ -224,7 +225,7 @@ __handle_command()
     fi
     c=$((c+1))
     __debug "${FUNCNAME[0]}: looking for ${next_command}"
-    declare -F $next_command >/dev/null && $next_command
+    declare -F "$next_command" >/dev/null && $next_command
 }
 
 __handle_word()
@@ -246,7 +247,8 @@ __handle_word()
     __handle_word
 }
 
-`)
+`
+	_, err = fmt.Fprint(out, preamStr)
 	return err
 }
 
@@ -401,10 +403,8 @@ func writeLocalNonPersistentFlag(flag *pflag.Flag, w io.Writer) error {
 		format += "="
 	}
 	format += "\")\n"
-	if _, err := fmt.Fprintf(w, format, name); err != nil {
-		return err
-	}
-	return nil
+	_, err := fmt.Fprintf(w, format, name)
+	return err
 }
 
 func writeFlags(cmd *Command, w io.Writer) error {
@@ -568,6 +568,7 @@ func gen(cmd *Command, w io.Writer) error {
 	return nil
 }
 
+// GenBashCompletion generates bash completion file and writes to the passed writer.
 func (cmd *Command) GenBashCompletion(w io.Writer) error {
 	if err := preamble(w, cmd.Name()); err != nil {
 		return err
@@ -587,6 +588,7 @@ func nonCompletableFlag(flag *pflag.Flag) bool {
 	return flag.Hidden || len(flag.Deprecated) > 0
 }
 
+// GenBashCompletionFile generates bash completion file.
 func (cmd *Command) GenBashCompletionFile(filename string) error {
 	outFile, err := os.Create(filename)
 	if err != nil {
diff --git a/bash_completions.md b/bash_completions.md
index 6e3b71f..7fa970f 100644
--- a/bash_completions.md
+++ b/bash_completions.md
@@ -18,7 +18,7 @@ func main() {
 }
 ```
 
-That will get you completions of subcommands and flags. If you make additional annotations to your code, you can get even more intelligent and flexible behavior.
+`out.sh` will get you completions of subcommands and flags. Copy it to `/etc/bash_completion.d/` as described [here](https://debian-administration.org/article/316/An_introduction_to_bash_completion_part_1) and reset your terminal to use autocompletion. If you make additional annotations to your code, you can get even more intelligent and flexible behavior.
 
 ## Creating your own custom functions
 
diff --git a/cobra.go b/cobra.go
index 93a2c0f..25473a7 100644
--- a/cobra.go
+++ b/cobra.go
@@ -37,38 +37,37 @@ var templateFuncs = template.FuncMap{
 
 var initializers []func()
 
-// automatic prefix matching can be a dangerous thing to automatically enable in CLI tools.
-// Set this to true to enable it
+// EnablePrefixMatching allows to set automatic prefix matching. Automatic prefix matching can be a dangerous thing
+// to automatically enable in CLI tools.
+// Set this to true to enable it.
 var EnablePrefixMatching = false
 
-//EnableCommandSorting controls sorting of the slice of commands, which is turned on by default.
-//To disable sorting, set it to false.
+// EnableCommandSorting controls sorting of the slice of commands, which is turned on by default.
+// To disable sorting, set it to false.
 var EnableCommandSorting = true
 
-//AddTemplateFunc adds a template function that's available to Usage and Help
-//template generation.
+// AddTemplateFunc adds a template function that's available to Usage and Help
+// template generation.
 func AddTemplateFunc(name string, tmplFunc interface{}) {
 	templateFuncs[name] = tmplFunc
 }
 
-//AddTemplateFuncs adds multiple template functions availalble to Usage and
-//Help template generation.
+// AddTemplateFuncs adds multiple template functions that are available to Usage and
+// Help template generation.
 func AddTemplateFuncs(tmplFuncs template.FuncMap) {
 	for k, v := range tmplFuncs {
 		templateFuncs[k] = v
 	}
 }
 
-//OnInitialize takes a series of func() arguments and appends them to a slice of func().
+// OnInitialize takes a series of func() arguments and appends them to a slice of func().
 func OnInitialize(y ...func()) {
-	for _, x := range y {
-		initializers = append(initializers, x)
-	}
+	initializers = append(initializers, y...)
 }
 
-//Gt takes two types and checks whether the first type is greater than the second. In case of types Arrays, Chans,
-//Maps and Slices, Gt will compare their lengths. Ints are compared directly while strings are first parsed as
-//ints and then compared.
+// Gt takes two types and checks whether the first type is greater than the second. In case of types Arrays, Chans,
+// Maps and Slices, Gt will compare their lengths. Ints are compared directly while strings are first parsed as
+// ints and then compared.
 func Gt(a interface{}, b interface{}) bool {
 	var left, right int64
 	av := reflect.ValueOf(a)
@@ -96,7 +95,7 @@ func Gt(a interface{}, b interface{}) bool {
 	return left > right
 }
 
-//Eq takes two types and checks whether they are equal. Supported types are int and string. Unsupported types will panic.
+// Eq takes two types and checks whether they are equal. Supported types are int and string. Unsupported types will panic.
 func Eq(a interface{}, b interface{}) bool {
 	av := reflect.ValueOf(a)
 	bv := reflect.ValueOf(b)
@@ -116,7 +115,7 @@ func trimRightSpace(s string) string {
 	return strings.TrimRightFunc(s, unicode.IsSpace)
 }
 
-// appendIfNotPresent will append stringToAppend to the end of s, but only if it's not yet present in s
+// appendIfNotPresent will append stringToAppend to the end of s, but only if it's not yet present in s.
 func appendIfNotPresent(s, stringToAppend string) string {
 	if strings.Contains(s, stringToAppend) {
 		return s
@@ -124,7 +123,7 @@ func appendIfNotPresent(s, stringToAppend string) string {
 	return s + " " + stringToAppend
 }
 
-//rpad adds padding to the right of a string
+// rpad adds padding to the right of a string.
 func rpad(s string, padding int) string {
 	template := fmt.Sprintf("%%-%ds", padding)
 	return fmt.Sprintf(template, s)
@@ -138,7 +137,7 @@ func tmpl(w io.Writer, text string, data interface{}) error {
 	return t.Execute(w, data)
 }
 
-// ld compares two strings and returns the levenshtein distance between them
+// ld compares two strings and returns the levenshtein distance between them.
 func ld(s, t string, ignoreCase bool) int {
 	if ignoreCase {
 		s = strings.ToLower(s)
diff --git a/cobra/cmd/init.go b/cobra/cmd/init.go
index 13792f1..b77c986 100644
--- a/cobra/cmd/init.go
+++ b/cobra/cmd/init.go
@@ -210,8 +210,8 @@ func initConfig() {
 	}
 
 	viper.SetConfigName(".{{ .appName }}") // name of config file (without extension)
-	viper.AddConfigPath("$HOME")  // adding home directory as first search path
-	viper.AutomaticEnv()          // read in environment variables that match
+	viper.AddConfigPath(os.Getenv("HOME")) // adding home directory as first search path
+	viper.AutomaticEnv()                   // read in environment variables that match
 
 	// If a config file is found, read it in.
 	if err := viper.ReadInConfig(); err == nil {
diff --git a/cobra/cmd/license_apache_2.go b/cobra/cmd/license_apache_2.go
new file mode 100644
index 0000000..878e1d9
--- /dev/null
+++ b/cobra/cmd/license_apache_2.go
@@ -0,0 +1,238 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Parts inspired by https://github.com/ryanuber/go-license
+
+package cmd
+
+func initApache2() {
+	Licenses["apache"] = License{
+		Name:            "Apache 2.0",
+		PossibleMatches: []string{"apache", "apache20", "apache 2.0", "apache2.0", "apache-2.0"},
+		Header: `
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.`,
+		Text: `
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
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+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
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+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
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+
+      "Work" shall mean the work of authorship, whether in Source or
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+      copyright notice that is included in or attached to the work
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+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
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+      separable from, or merely link (or bind by name) to the interfaces of,
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+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
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+      communication on electronic mailing lists, source code control systems,
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+      may provide additional or different license terms and conditions
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+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
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+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
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+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+`,
+	}
+}
diff --git a/cobra/cmd/license_bsd_clause_2.go b/cobra/cmd/license_bsd_clause_2.go
new file mode 100644
index 0000000..26bc775
--- /dev/null
+++ b/cobra/cmd/license_bsd_clause_2.go
@@ -0,0 +1,71 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Parts inspired by https://github.com/ryanuber/go-license
+
+package cmd
+
+func initBsdClause2() {
+	Licenses["freebsd"] = License{
+		Name:            "Simplified BSD License",
+		PossibleMatches: []string{"freebsd", "simpbsd", "simple bsd", "2 clause bsd"},
+		Header: `
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.`,
+		Text: `{{ .copyright }}
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+`,
+	}
+}
diff --git a/cobra/cmd/license_bsd_clause_3.go b/cobra/cmd/license_bsd_clause_3.go
new file mode 100644
index 0000000..062c115
--- /dev/null
+++ b/cobra/cmd/license_bsd_clause_3.go
@@ -0,0 +1,79 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Parts inspired by https://github.com/ryanuber/go-license
+
+package cmd
+
+func initBsdClause3() {
+	Licenses["bsd"] = License{
+		Name:            "NewBSD",
+		PossibleMatches: []string{"bsd", "newbsd", "3 clause bsd"},
+		Header: `
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.`,
+		Text: `{{ .copyright }}
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+`,
+	}
+}
diff --git a/cobra/cmd/license_gpl_2.go b/cobra/cmd/license_gpl_2.go
new file mode 100644
index 0000000..b361dd7
--- /dev/null
+++ b/cobra/cmd/license_gpl_2.go
@@ -0,0 +1,318 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Parts inspired by https://github.com/ryanuber/go-license
+
+package cmd
+
+func initGpl2() {
+	Licenses["gpl2"] = License{
+		Name:            "GNU General Public License 2.0",
+		PossibleMatches: []string{"gpl2", "gnu gpl2"},
+		Header: `{{ .copyright }}
+
+ {{ .appName }} is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ as published by the Free Software Foundation; either version 2
+ of the License, or (at your option) any later version.
+
+ {{ .appName }} is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with {{ .appName }}. If not, see <http://www.gnu.org/licenses/>.`,
+		Text: `                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+`,
+	}
+}
diff --git a/cobra/cmd/license_gpl_3.go b/cobra/cmd/license_gpl_3.go
new file mode 100644
index 0000000..5810276
--- /dev/null
+++ b/cobra/cmd/license_gpl_3.go
@@ -0,0 +1,661 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Parts inspired by https://github.com/ryanuber/go-license
+
+package cmd
+
+func initGpl3() {
+	Licenses["gpl3"] = License{
+		Name:            "GNU General Public License 3.0",
+		PossibleMatches: []string{"gpl3", "gpl", "gnu gpl3", "gnu gpl"},
+		Header: `
+This file is part of {{ .appName }}.
+
+{{ .appName }} is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+{{ .appName }} is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with {{ .appName }}. If not, see <http://www.gnu.org/licenses/>.
+	   `,
+		Text: `                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable.  Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products.  If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary.  To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+  "The Program" refers to any copyrightable work licensed under this
+License.  Each licensee is addressed as "you".  "Licensees" and
+"recipients" may be individuals or organizations.
+
+  To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy.  The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+  A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+  To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy.  Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+  To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies.  Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+  An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License.  If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+  1. Source Code.
+
+  The "source code" for a work means the preferred form of the work
+for making modifications to it.  "Object code" means any non-source
+form of a work.
+
+  A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that
+is widely used among developers working in that language.
+
+  The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
+Component, and (b) serves only to enable use of the work with that
+Major Component, or to implement a Standard Interface for which an
+implementation is available to the public in source code form.  A
+"Major Component", in this context, means a major essential component
+(kernel, window system, and so on) of the specific operating system
+(if any) on which the executable work runs, or a compiler used to
+produce the work, or an object code interpreter used to run it.
+
+  The "Corresponding Source" for a work in object code form means all
+the source code needed to generate, install, and (for an executable
+work) run the object code and to modify the work, including scripts to
+control those activities.  However, it does not include the work's
+System Libraries, or general-purpose tools or generally available free
+programs which are used unmodified in performing those activities but
+which are not part of the work.  For example, Corresponding Source
+includes interface definition files associated with source files for
+the work, and the source code for shared libraries and dynamically
+linked subprograms that the work is specifically designed to require,
+such as by intimate data communication or control flow between those
+subprograms and other parts of the work.
+
+  The Corresponding Source need not include anything that users
+can regenerate automatically from other parts of the Corresponding
+Source.
+
+  The Corresponding Source for a work in source code form is that
+same work.
+
+  2. Basic Permissions.
+
+  All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met.  This License explicitly affirms your unlimited
+permission to run the unmodified Program.  The output from running a
+covered work is covered by this License only if the output, given its
+content, constitutes a covered work.  This License acknowledges your
+rights of fair use or other equivalent, as provided by copyright law.
+
+  You may make, run and propagate covered works that you do not
+convey, without conditions so long as your license otherwise remains
+in force.  You may convey covered works to others for the sole purpose
+of having them make modifications exclusively for you, or provide you
+with facilities for running those works, provided that you comply with
+the terms of this License in conveying all material for which you do
+not control copyright.  Those thus making or running the covered works
+for you must do so exclusively on your behalf, under your direction
+and control, on terms that prohibit them from making any copies of
+your copyrighted material outside their relationship with you.
+
+  Conveying under any other circumstances is permitted solely under
+the conditions stated below.  Sublicensing is not allowed; section 10
+makes it unnecessary.
+
+  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+  No covered work shall be deemed part of an effective technological
+measure under any applicable law fulfilling obligations under article
+11 of the WIPO copyright treaty adopted on 20 December 1996, or
+similar laws prohibiting or restricting circumvention of such
+measures.
+
+  When you convey a covered work, you waive any legal power to forbid
+circumvention of technological measures to the extent such circumvention
+is effected by exercising rights under this License with respect to
+the covered work, and you disclaim any intention to limit operation or
+modification of the work as a means of enforcing, against the work's
+users, your or third parties' legal rights to forbid circumvention of
+technological measures.
+
+  4. Conveying Verbatim Copies.
+
+  You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
+appropriately publish on each copy an appropriate copyright notice;
+keep intact all notices stating that this License and any
+non-permissive terms added in accord with section 7 apply to the code;
+keep intact all notices of the absence of any warranty; and give all
+recipients a copy of this License along with the Program.
+
+  You may charge any price or no price for each copy that you convey,
+and you may offer support or warranty protection for a fee.
+
+  5. Conveying Modified Source Versions.
+
+  You may convey a work based on the Program, or the modifications to
+produce it from the Program, in the form of source code under the
+terms of section 4, provided that you also meet all of these conditions:
+
+    a) The work must carry prominent notices stating that you modified
+    it, and giving a relevant date.
+
+    b) The work must carry prominent notices stating that it is
+    released under this License and any conditions added under section
+    7.  This requirement modifies the requirement in section 4 to
+    "keep intact all notices".
+
+    c) You must license the entire work, as a whole, under this
+    License to anyone who comes into possession of a copy.  This
+    License will therefore apply, along with any applicable section 7
+    additional terms, to the whole of the work, and all its parts,
+    regardless of how they are packaged.  This License gives no
+    permission to license the work in any other way, but it does not
+    invalidate such permission if you have separately received it.
+
+    d) If the work has interactive user interfaces, each must display
+    Appropriate Legal Notices; however, if the Program has interactive
+    interfaces that do not display Appropriate Legal Notices, your
+    work need not make them do so.
+
+  A compilation of a covered work with other separate and independent
+works, which are not by their nature extensions of the covered work,
+and which are not combined with it such as to form a larger program,
+in or on a volume of a storage or distribution medium, is called an
+"aggregate" if the compilation and its resulting copyright are not
+used to limit the access or legal rights of the compilation's users
+beyond what the individual works permit.  Inclusion of a covered work
+in an aggregate does not cause this License to apply to the other
+parts of the aggregate.
+
+  6. Conveying Non-Source Forms.
+
+  You may convey a covered work in object code form under the terms
+of sections 4 and 5, provided that you also convey the
+machine-readable Corresponding Source under the terms of this License,
+in one of these ways:
+
+    a) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by the
+    Corresponding Source fixed on a durable physical medium
+    customarily used for software interchange.
+
+    b) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by a
+    written offer, valid for at least three years and valid for as
+    long as you offer spare parts or customer support for that product
+    model, to give anyone who possesses the object code either (1) a
+    copy of the Corresponding Source for all the software in the
+    product that is covered by this License, on a durable physical
+    medium customarily used for software interchange, for a price no
+    more than your reasonable cost of physically performing this
+    conveying of source, or (2) access to copy the
+    Corresponding Source from a network server at no charge.
+
+    c) Convey individual copies of the object code with a copy of the
+    written offer to provide the Corresponding Source.  This
+    alternative is allowed only occasionally and noncommercially, and
+    only if you received the object code with such an offer, in accord
+    with subsection 6b.
+
+    d) Convey the object code by offering access from a designated
+    place (gratis or for a charge), and offer equivalent access to the
+    Corresponding Source in the same way through the same place at no
+    further charge.  You need not require recipients to copy the
+    Corresponding Source along with the object code.  If the place to
+    copy the object code is a network server, the Corresponding Source
+    may be on a different server (operated by you or a third party)
+    that supports equivalent copying facilities, provided you maintain
+    clear directions next to the object code saying where to find the
+    Corresponding Source.  Regardless of what server hosts the
+    Corresponding Source, you remain obligated to ensure that it is
+    available for as long as needed to satisfy these requirements.
+
+    e) Convey the object code using peer-to-peer transmission, provided
+    you inform other peers where the object code and Corresponding
+    Source of the work are being offered to the general public at no
+    charge under subsection 6d.
+
+  A separable portion of the object code, whose source code is excluded
+from the Corresponding Source as a System Library, need not be
+included in conveying the object code work.
+
+  A "User Product" is either (1) a "consumer product", which means any
+tangible personal property which is normally used for personal, family,
+or household purposes, or (2) anything designed or sold for incorporation
+into a dwelling.  In determining whether a product is a consumer product,
+doubtful cases shall be resolved in favor of coverage.  For a particular
+product received by a particular user, "normally used" refers to a
+typical or common use of that class of product, regardless of the status
+of the particular user or of the way in which the particular user
+actually uses, or expects or is expected to use, the product.  A product
+is a consumer product regardless of whether the product has substantial
+commercial, industrial or non-consumer uses, unless such uses represent
+the only significant mode of use of the product.
+
+  "Installation Information" for a User Product means any methods,
+procedures, authorization keys, or other information required to install
+and execute modified versions of a covered work in that User Product from
+a modified version of its Corresponding Source.  The information must
+suffice to ensure that the continued functioning of the modified object
+code is in no case prevented or interfered with solely because
+modification has been made.
+
+  If you convey an object code work under this section in, or with, or
+specifically for use in, a User Product, and the conveying occurs as
+part of a transaction in which the right of possession and use of the
+User Product is transferred to the recipient in perpetuity or for a
+fixed term (regardless of how the transaction is characterized), the
+Corresponding Source conveyed under this section must be accompanied
+by the Installation Information.  But this requirement does not apply
+if neither you nor any third party retains the ability to install
+modified object code on the User Product (for example, the work has
+been installed in ROM).
+
+  The requirement to provide Installation Information does not include a
+requirement to continue to provide support service, warranty, or updates
+for a work that has been modified or installed by the recipient, or for
+the User Product in which it has been modified or installed.  Access to a
+network may be denied when the modification itself materially and
+adversely affects the operation of the network or violates the rules and
+protocols for communication across the network.
+
+  Corresponding Source conveyed, and Installation Information provided,
+in accord with this section must be in a format that is publicly
+documented (and with an implementation available to the public in
+source code form), and must require no special password or key for
+unpacking, reading or copying.
+
+  7. Additional Terms.
+
+  "Additional permissions" are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law.  If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+  When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
+it.  (Additional permissions may be written to require their own
+removal in certain cases when you modify the work.)  You may place
+additional permissions on material, added by you to a covered work,
+for which you have or can give appropriate copyright permission.
+
+  Notwithstanding any other provision of this License, for material you
+add to a covered work, you may (if authorized by the copyright holders of
+that material) supplement the terms of this License with terms:
+
+    a) Disclaiming warranty or limiting liability differently from the
+    terms of sections 15 and 16 of this License; or
+
+    b) Requiring preservation of specified reasonable legal notices or
+    author attributions in that material or in the Appropriate Legal
+    Notices displayed by works containing it; or
+
+    c) Prohibiting misrepresentation of the origin of that material, or
+    requiring that modified versions of such material be marked in
+    reasonable ways as different from the original version; or
+
+    d) Limiting the use for publicity purposes of names of licensors or
+    authors of the material; or
+
+    e) Declining to grant rights under trademark law for use of some
+    trade names, trademarks, or service marks; or
+
+    f) Requiring indemnification of licensors and authors of that
+    material by anyone who conveys the material (or modified versions of
+    it) with contractual assumptions of liability to the recipient, for
+    any liability that these contractual assumptions directly impose on
+    those licensors and authors.
+
+  All other non-permissive additional terms are considered "further
+restrictions" within the meaning of section 10.  If the Program as you
+received it, or any part of it, contains a notice stating that it is
+governed by this License along with a term that is a further
+restriction, you may remove that term.  If a license document contains
+a further restriction but permits relicensing or conveying under this
+License, you may add to a covered work material governed by the terms
+of that license document, provided that the further restriction does
+not survive such relicensing or conveying.
+
+  If you add terms to a covered work in accord with this section, you
+must place, in the relevant source files, a statement of the
+additional terms that apply to those files, or a notice indicating
+where to find the applicable terms.
+
+  Additional terms, permissive or non-permissive, may be stated in the
+form of a separately written license, or stated as exceptions;
+the above requirements apply either way.
+
+  8. Termination.
+
+  You may not propagate or modify a covered work except as expressly
+provided under this License.  Any attempt otherwise to propagate or
+modify it is void, and will automatically terminate your rights under
+this License (including any patent licenses granted under the third
+paragraph of section 11).
+
+  However, if you cease all violation of this License, then your
+license from a particular copyright holder is reinstated (a)
+provisionally, unless and until the copyright holder explicitly and
+finally terminates your license, and (b) permanently, if the copyright
+holder fails to notify you of the violation by some reasonable means
+prior to 60 days after the cessation.
+
+  Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+  Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License.  If your rights have been terminated and not permanently
+reinstated, you do not qualify to receive new licenses for the same
+material under section 10.
+
+  9. Acceptance Not Required for Having Copies.
+
+  You are not required to accept this License in order to receive or
+run a copy of the Program.  Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance.  However,
+nothing other than this License grants you permission to propagate or
+modify any covered work.  These actions infringe copyright if you do
+not accept this License.  Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+  10. Automatic Licensing of Downstream Recipients.
+
+  Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License.  You are not responsible
+for enforcing compliance by third parties with this License.
+
+  An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations.  If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+  You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License.  For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+  11. Patents.
+
+  A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based.  The
+work thus licensed is called the contributor's "contributor version".
+
+  A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version.  For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+  Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+  In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement).  To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+`,
+	}
+}
diff --git a/cobra/cmd/license_mit.go b/cobra/cmd/license_mit.go
new file mode 100644
index 0000000..4ff5a4c
--- /dev/null
+++ b/cobra/cmd/license_mit.go
@@ -0,0 +1,63 @@
+// Copyright © 2015 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Parts inspired by https://github.com/ryanuber/go-license
+
+package cmd
+
+func initMit() {
+	Licenses["mit"] = License{
+		Name:            "Mit",
+		PossibleMatches: []string{"mit"},
+		Header: `
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.`,
+		Text: `The MIT License (MIT)
+
+{{ .copyright }}
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+`,
+	}
+}
diff --git a/cobra/cmd/licenses.go b/cobra/cmd/licenses.go
index b4c742c..5b3cb72 100644
--- a/cobra/cmd/licenses.go
+++ b/cobra/cmd/licenses.go
@@ -52,1326 +52,17 @@ func init() {
 	// Allows a user to use config for a custom license.
 	Licenses["custom"] = License{"Custom", []string{}, "", ""}
 
-	Licenses["apache"] = License{
-		Name:            "Apache 2.0",
-		PossibleMatches: []string{"apache", "apache20", "apache 2.0", "apache2.0", "apache-2.0"},
-		Header: `
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
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-//     http://www.apache.org/licenses/LICENSE-2.0
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-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.`,
-		Text: `
-                                 Apache License
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-`,
-	}
-
-	Licenses["mit"] = License{
-		Name:            "Mit",
-		PossibleMatches: []string{"mit"},
-		Header: `
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
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-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.`,
-		Text: `The MIT License (MIT)
-
-{{ .copyright }}
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-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
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-The above copyright notice and this permission notice shall be included in
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-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
-`,
-	}
-
-	Licenses["bsd"] = License{
-		Name:            "NewBSD",
-		PossibleMatches: []string{"bsd", "newbsd", "3 clause bsd"},
-		Header: `
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
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-1. Redistributions of source code must retain the above copyright notice,
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-3. Neither the name of the copyright holder nor the names of its contributors
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-CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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-INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.`,
-		Text: `{{ .copyright }}
-All rights reserved.
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-modification, are permitted provided that the following conditions are met:
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-OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-`,
-	}
-
-	Licenses["freebsd"] = License{
-		Name:            "Simplified BSD License",
-		PossibleMatches: []string{"freebsd", "simpbsd", "simple bsd", "2 clause bsd"},
-		Header: `
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
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-1. Redistributions of source code must retain the above copyright notice,
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-CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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-POSSIBILITY OF SUCH DAMAGE.`,
-		Text: `{{ .copyright }}
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-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-`,
-	}
-
-	Licenses["gpl2"] = License{
-		Name:            "GNU General Public License 2.0",
-		PossibleMatches: []string{"gpl2", "gnu gpl2"},
-		Header: `{{ .copyright }}
-
- {{ .appName }} is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License
- as published by the Free Software Foundation; either version 2
- of the License, or (at your option) any later version.
-
- {{ .appName }} is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with {{ .appName }}. If not, see <http://www.gnu.org/licenses/>.`,
-		Text: `                    GNU GENERAL PUBLIC LICENSE
-                       Version 2, June 1991
-
- Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- Everyone is permitted to copy and distribute verbatim copies
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-
-                            Preamble
-
-  The licenses for most software are designed to take away your
-freedom to share and change it.  By contrast, the GNU General Public
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-
-                    GNU GENERAL PUBLIC LICENSE
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-this License, you may choose any version ever published by the Free Software
-Foundation.
+	initApache2()
 
-  10. If you wish to incorporate parts of the Program into other free
-programs whose distribution conditions are different, write to the author
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+	initMit()
 
-                            NO WARRANTY
+	initBsdClause3()
 
-  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
-FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
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+	initBsdClause2()
 
-  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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+	initGpl2()
 
-                     END OF TERMS AND CONDITIONS
-`,
-	}
-	Licenses["gpl3"] = License{
-		Name:            "GNU General Public License 3.0",
-		PossibleMatches: []string{"gpl3", "gpl", "gnu gpl3", "gnu gpl"},
-		Header: `
-This file is part of {{ .appName }}.
-
-{{ .appName }} is free software: you can redistribute it and/or modify
-it under the terms of the GNU Lesser General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-{{ .appName }} is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
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-
-You should have received a copy of the GNU Lesser General Public License
-along with {{ .appName }}. If not, see <http://www.gnu.org/licenses/>.
-	   `,
-		Text: `                    GNU GENERAL PUBLIC LICENSE
-                       Version 3, 29 June 2007
-
- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
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-patent against the party.
-
-  If you convey a covered work, knowingly relying on a patent license,
-and the Corresponding Source of the work is not available for anyone
-to copy, free of charge and under the terms of this License, through a
-publicly available network server or other readily accessible means,
-then you must either (1) cause the Corresponding Source to be so
-available, or (2) arrange to deprive yourself of the benefit of the
-patent license for this particular work, or (3) arrange, in a manner
-consistent with the requirements of this License, to extend the patent
-license to downstream recipients.  "Knowingly relying" means you have
-actual knowledge that, but for the patent license, your conveying the
-covered work in a country, or your recipient's use of the covered work
-in a country, would infringe one or more identifiable patents in that
-country that you have reason to believe are valid.
-
-  If, pursuant to or in connection with a single transaction or
-arrangement, you convey, or propagate by procuring conveyance of, a
-covered work, and grant a patent license to some of the parties
-receiving the covered work authorizing them to use, propagate, modify
-or convey a specific copy of the covered work, then the patent license
-you grant is automatically extended to all recipients of the covered
-work and works based on it.
-
-  A patent license is "discriminatory" if it does not include within
-the scope of its coverage, prohibits the exercise of, or is
-conditioned on the non-exercise of one or more of the rights that are
-specifically granted under this License.  You may not convey a covered
-work if you are a party to an arrangement with a third party that is
-in the business of distributing software, under which you make payment
-to the third party based on the extent of your activity of conveying
-the work, and under which the third party grants, to any of the
-parties who would receive the covered work from you, a discriminatory
-patent license (a) in connection with copies of the covered work
-conveyed by you (or copies made from those copies), or (b) primarily
-for and in connection with specific products or compilations that
-contain the covered work, unless you entered into that arrangement,
-or that patent license was granted, prior to 28 March 2007.
-
-  Nothing in this License shall be construed as excluding or limiting
-any implied license or other defenses to infringement that may
-otherwise be available to you under applicable patent law.
-
-  12. No Surrender of Others' Freedom.
-
-  If conditions are imposed on you (whether by court order, agreement or
-otherwise) that contradict the conditions of this License, they do not
-excuse you from the conditions of this License.  If you cannot convey a
-covered work so as to satisfy simultaneously your obligations under this
-License and any other pertinent obligations, then as a consequence you may
-not convey it at all.  For example, if you agree to terms that obligate you
-to collect a royalty for further conveying from those to whom you convey
-the Program, the only way you could satisfy both those terms and this
-License would be to refrain entirely from conveying the Program.
-
-  13. Use with the GNU Affero General Public License.
-
-  Notwithstanding any other provision of this License, you have
-permission to link or combine any covered work with a work licensed
-under version 3 of the GNU Affero General Public License into a single
-combined work, and to convey the resulting work.  The terms of this
-License will continue to apply to the part which is the covered work,
-but the special requirements of the GNU Affero General Public License,
-section 13, concerning interaction through a network will apply to the
-combination as such.
-
-  14. Revised Versions of this License.
-
-  The Free Software Foundation may publish revised and/or new versions of
-the GNU General Public License from time to time.  Such new versions will
-be similar in spirit to the present version, but may differ in detail to
-address new problems or concerns.
-
-  Each version is given a distinguishing version number.  If the
-Program specifies that a certain numbered version of the GNU General
-Public License "or any later version" applies to it, you have the
-option of following the terms and conditions either of that numbered
-version or of any later version published by the Free Software
-Foundation.  If the Program does not specify a version number of the
-GNU General Public License, you may choose any version ever published
-by the Free Software Foundation.
-
-  If the Program specifies that a proxy can decide which future
-versions of the GNU General Public License can be used, that proxy's
-public statement of acceptance of a version permanently authorizes you
-to choose that version for the Program.
-
-  Later license versions may give you additional or different
-permissions.  However, no additional obligations are imposed on any
-author or copyright holder as a result of your choosing to follow a
-later version.
-
-  15. Disclaimer of Warranty.
-
-  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
-APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
-HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
-OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
-THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
-IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
-ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
-
-  16. Limitation of Liability.
-
-  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
-THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
-GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
-USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
-DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
-PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
-EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGES.
-
-  17. Interpretation of Sections 15 and 16.
-
-  If the disclaimer of warranty and limitation of liability provided
-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
-                     END OF TERMS AND CONDITIONS
-`,
-	}
+	initGpl3()
 
 	// Licenses["apache20"] = License{
 	// 	Name:            "Apache 2.0",
diff --git a/cobra/cmd/root.go b/cobra/cmd/root.go
index 065c8bf..32386ac 100644
--- a/cobra/cmd/root.go
+++ b/cobra/cmd/root.go
@@ -61,9 +61,9 @@ func initConfig() {
 		viper.SetConfigFile(cfgFile)
 	}
 
-	viper.SetConfigName(".cobra") // name of config file (without extension)
-	viper.AddConfigPath("$HOME")  // adding home directory as first search path
-	viper.AutomaticEnv()          // read in environment variables that match
+	viper.SetConfigName(".cobra")          // name of config file (without extension)
+	viper.AddConfigPath(os.Getenv("HOME")) // adding home directory as first search path
+	viper.AutomaticEnv()                   // read in environment variables that match
 
 	// If a config file is found, read it in.
 	if err := viper.ReadInConfig(); err == nil {
diff --git a/command.go b/command.go
index 083e4ea..329bbea 100644
--- a/command.go
+++ b/command.go
@@ -57,12 +57,19 @@ type Command struct {
 	Deprecated string
 	// Is this command hidden and should NOT show up in the list of available commands?
 	Hidden bool
+	// Annotations are key/value pairs that can be used by applications to identify or
+	// group commands
+	Annotations map[string]string
 	// Full set of flags
 	flags *flag.FlagSet
 	// Set of flags childrens of this command will inherit
 	pflags *flag.FlagSet
 	// Flags that are declared specifically by this command (not inherited).
 	lflags *flag.FlagSet
+	// Inherited flags.
+	iflags *flag.FlagSet
+	// All persistent flags of cmd's parents.
+	parentsPflags *flag.FlagSet
 	// SilenceErrors is an option to quiet errors down stream
 	SilenceErrors bool
 	// Silence Usage is an option to silence usage when an error occurs.
@@ -107,12 +114,11 @@ type Command struct {
 	// is commands slice are sorted or not
 	commandsAreSorted bool
 
-	flagErrorBuf *bytes.Buffer
-
-	args          []string                 // actual args parsed from flags
-	output        *io.Writer               // out writer if set in SetOutput(w)
-	usageFunc     func(*Command) error     // Usage can be defined by application
-	usageTemplate string                   // Can be defined by Application
+	args          []string             // actual args parsed from flags
+	output        io.Writer            // out writer if set in SetOutput(w)
+	usageFunc     func(*Command) error // Usage can be defined by application
+	usageTemplate string               // Can be defined by Application
+	flagErrorFunc func(*Command, error) error
 	helpTemplate  string                   // Can be defined by Application
 	helpFunc      func(*Command, []string) // Help can be defined by application
 	helpCommand   *Command                 // The help command
@@ -128,7 +134,7 @@ type Command struct {
 	DisableFlagParsing bool
 }
 
-// os.Args[1:] by default, if desired, can be overridden
+// SetArgs sets arguments for the command. It is set to os.Args[1:] by default, if desired, can be overridden
 // particularly useful when testing.
 func (c *Command) SetArgs(a []string) {
 	c.args = a
@@ -137,29 +143,36 @@ func (c *Command) SetArgs(a []string) {
 // SetOutput sets the destination for usage and error messages.
 // If output is nil, os.Stderr is used.
 func (c *Command) SetOutput(output io.Writer) {
-	c.output = &output
+	c.output = output
 }
 
-// Usage can be defined by application
+// SetUsageFunc sets usage function. Usage can be defined by application.
 func (c *Command) SetUsageFunc(f func(*Command) error) {
 	c.usageFunc = f
 }
 
-// Can be defined by Application
+// SetUsageTemplate sets usage template. Can be defined by Application.
 func (c *Command) SetUsageTemplate(s string) {
 	c.usageTemplate = s
 }
 
-// Can be defined by Application
+// SetFlagErrorFunc sets a function to generate an error when flag parsing
+// fails.
+func (c *Command) SetFlagErrorFunc(f func(*Command, error) error) {
+	c.flagErrorFunc = f
+}
+
+// SetHelpFunc sets help function. Can be defined by Application.
 func (c *Command) SetHelpFunc(f func(*Command, []string)) {
 	c.helpFunc = f
 }
 
+// SetHelpCommand sets help command.
 func (c *Command) SetHelpCommand(cmd *Command) {
 	c.helpCommand = cmd
 }
 
-// Can be defined by Application
+// SetHelpTemplate sets help template to be used. Application can use it to set custom template.
 func (c *Command) SetHelpTemplate(s string) {
 	c.helpTemplate = s
 }
@@ -176,17 +189,19 @@ func (c *Command) SetGlobalNormalizationFunc(n func(f *flag.FlagSet, name string
 	}
 }
 
+// OutOrStdout returns output to stdout.
 func (c *Command) OutOrStdout() io.Writer {
 	return c.getOut(os.Stdout)
 }
 
+// OutOrStderr returns output to stderr
 func (c *Command) OutOrStderr() io.Writer {
 	return c.getOut(os.Stderr)
 }
 
 func (c *Command) getOut(def io.Writer) io.Writer {
 	if c.output != nil {
-		return *c.output
+		return c.output
 	}
 	if c.HasParent() {
 		return c.parent.getOut(def)
@@ -195,7 +210,7 @@ func (c *Command) getOut(def io.Writer) io.Writer {
 }
 
 // UsageFunc returns either the function set by SetUsageFunc for this command
-// or a parent, or it returns a default usage function
+// or a parent, or it returns a default usage function.
 func (c *Command) UsageFunc() (f func(*Command) error) {
 	if c.usageFunc != nil {
 		return c.usageFunc
@@ -214,22 +229,18 @@ func (c *Command) UsageFunc() (f func(*Command) error) {
 	}
 }
 
-// Output the usage for the command
-// Used when a user provides invalid input
-// Can be defined by user by overriding UsageFunc
+// Usage puts out the usage for the command.
+// Used when a user provides invalid input.
+// Can be defined by user by overriding UsageFunc.
 func (c *Command) Usage() error {
 	return c.UsageFunc()(c)
 }
 
 // HelpFunc returns either the function set by SetHelpFunc for this command
-// or a parent, or it returns a function with default help behavior
+// or a parent, or it returns a function with default help behavior.
 func (c *Command) HelpFunc() func(*Command, []string) {
-	cmd := c
-	for cmd != nil {
-		if cmd.helpFunc != nil {
-			return cmd.helpFunc
-		}
-		cmd = cmd.parent
+	if helpFunc := c.checkHelpFunc(); helpFunc != nil {
+		return helpFunc
 	}
 	return func(*Command, []string) {
 		c.mergePersistentFlags()
@@ -240,14 +251,29 @@ func (c *Command) HelpFunc() func(*Command, []string) {
 	}
 }
 
-// Output the help for the command
-// Used when a user calls help [command]
-// Can be defined by user by overriding HelpFunc
+// checkHelpFunc checks if there is helpFunc in ancestors of c.
+func (c *Command) checkHelpFunc() func(*Command, []string) {
+	if c == nil {
+		return nil
+	}
+	if c.helpFunc != nil {
+		return c.helpFunc
+	}
+	if c.HasParent() {
+		return c.parent.checkHelpFunc()
+	}
+	return nil
+}
+
+// Help puts out the help for the command.
+// Used when a user calls help [command].
+// Can be defined by user by overriding HelpFunc.
 func (c *Command) Help() error {
 	c.HelpFunc()(c, []string{})
 	return nil
 }
 
+// UsageString return usage string.
 func (c *Command) UsageString() string {
 	tmpOutput := c.output
 	bb := new(bytes.Buffer)
@@ -257,8 +283,25 @@ func (c *Command) UsageString() string {
 	return bb.String()
 }
 
+// FlagErrorFunc returns either the function set by SetFlagErrorFunc for this
+// command or a parent, or it returns a function which returns the original
+// error.
+func (c *Command) FlagErrorFunc() (f func(*Command, error) error) {
+	if c.flagErrorFunc != nil {
+		return c.flagErrorFunc
+	}
+
+	if c.HasParent() {
+		return c.parent.FlagErrorFunc()
+	}
+	return func(c *Command, err error) error {
+		return err
+	}
+}
+
 var minUsagePadding = 25
 
+// UsagePadding return padding for the usage.
 func (c *Command) UsagePadding() int {
 	if c.parent == nil || minUsagePadding > c.parent.commandsMaxUseLen {
 		return minUsagePadding
@@ -268,7 +311,7 @@ func (c *Command) UsagePadding() int {
 
 var minCommandPathPadding = 11
 
-//
+// CommandPathPadding return padding for the command path.
 func (c *Command) CommandPathPadding() int {
 	if c.parent == nil || minCommandPathPadding > c.parent.commandsMaxCommandPathLen {
 		return minCommandPathPadding
@@ -278,6 +321,7 @@ func (c *Command) CommandPathPadding() int {
 
 var minNamePadding = 11
 
+// NamePadding returns padding for the name.
 func (c *Command) NamePadding() int {
 	if c.parent == nil || minNamePadding > c.parent.commandsMaxNameLen {
 		return minNamePadding
@@ -285,6 +329,7 @@ func (c *Command) NamePadding() int {
 	return c.parent.commandsMaxNameLen
 }
 
+// UsageTemplate returns usage template for the command.
 func (c *Command) UsageTemplate() string {
 	if c.usageTemplate != "" {
 		return c.usageTemplate
@@ -298,28 +343,28 @@ func (c *Command) UsageTemplate() string {
   {{ .CommandPath}} [command]{{end}}{{if gt .Aliases 0}}
 
 Aliases:
-  {{.NameAndAliases}}
-{{end}}{{if .HasExample}}
+  {{.NameAndAliases}}{{end}}{{if .HasExample}}
 
 Examples:
-{{ .Example }}{{end}}{{ if .HasAvailableSubCommands}}
+{{ .Example }}{{end}}{{if .HasAvailableSubCommands}}
 
-Available Commands:{{range .Commands}}{{if .IsAvailableCommand}}
-  {{rpad .Name .NamePadding }} {{.Short}}{{end}}{{end}}{{end}}{{ if .HasAvailableLocalFlags}}
+Available Commands:{{range .Commands}}{{if (or .IsAvailableCommand (eq .Name "help"))}}
+  {{rpad .Name .NamePadding }} {{.Short}}{{end}}{{end}}{{end}}{{if .HasAvailableLocalFlags}}
 
 Flags:
-{{.LocalFlags.FlagUsages | trimRightSpace}}{{end}}{{ if .HasAvailableInheritedFlags}}
+{{.LocalFlags.FlagUsages | trimRightSpace}}{{end}}{{if .HasAvailableInheritedFlags}}
 
 Global Flags:
 {{.InheritedFlags.FlagUsages | trimRightSpace}}{{end}}{{if .HasHelpSubCommands}}
 
-Additional help topics:{{range .Commands}}{{if .IsHelpCommand}}
-  {{rpad .CommandPath .CommandPathPadding}} {{.Short}}{{end}}{{end}}{{end}}{{ if .HasAvailableSubCommands }}
+Additional help topics:{{range .Commands}}{{if .IsAdditionalHelpTopicCommand}}
+  {{rpad .CommandPath .CommandPathPadding}} {{.Short}}{{end}}{{end}}{{end}}{{if .HasAvailableSubCommands}}
 
 Use "{{.CommandPath}} [command] --help" for more information about a command.{{end}}
 `
 }
 
+// HelpTemplate return help template for the command.
 func (c *Command) HelpTemplate() string {
 	if c.helpTemplate != "" {
 		return c.helpTemplate
@@ -333,27 +378,25 @@ func (c *Command) HelpTemplate() string {
 {{end}}{{if or .Runnable .HasSubCommands}}{{.UsageString}}{{end}}`
 }
 
-// Really only used when casting a command to a commander
+// Really only used when casting a command to a commander.
 func (c *Command) resetChildrensParents() {
 	for _, x := range c.commands {
 		x.parent = c
 	}
 }
 
-// Test if the named flag is a boolean flag.
-func isBooleanFlag(name string, f *flag.FlagSet) bool {
+func hasNoOptDefVal(name string, f *flag.FlagSet) bool {
 	flag := f.Lookup(name)
 	if flag == nil {
 		return false
 	}
-	return flag.Value.Type() == "bool"
+	return len(flag.NoOptDefVal) > 0
 }
 
-// Test if the named flag is a boolean flag.
-func isBooleanShortFlag(name string, f *flag.FlagSet) bool {
+func shortHasNoOptDefVal(name string, fs *flag.FlagSet) bool {
 	result := false
-	f.VisitAll(func(f *flag.Flag) {
-		if f.Shorthand == name && f.Value.Type() == "bool" {
+	fs.VisitAll(func(flag *flag.Flag) {
+		if flag.Shorthand == name && len(flag.NoOptDefVal) > 0 {
 			result = true
 		}
 	})
@@ -379,13 +422,13 @@ func stripFlags(args []string, c *Command) []string {
 				inQuote = true
 			case strings.HasPrefix(y, "--") && !strings.Contains(y, "="):
 				// TODO: this isn't quite right, we should really check ahead for 'true' or 'false'
-				inFlag = !isBooleanFlag(y[2:], c.Flags())
-			case strings.HasPrefix(y, "-") && !strings.Contains(y, "=") && len(y) == 2 && !isBooleanShortFlag(y[1:], c.Flags()):
+				inFlag = !hasNoOptDefVal(y[2:], c.Flags())
+			case strings.HasPrefix(y, "-") && !strings.Contains(y, "=") && len(y) == 2 && !shortHasNoOptDefVal(y[1:], c.Flags()):
 				inFlag = true
 			case inFlag:
 				inFlag = false
 			case y == "":
-				// strip empty commands, as the go tests expect this to be ok....
+			// strip empty commands, as the go tests expect this to be ok....
 			case !strings.HasPrefix(y, "-"):
 				commands = append(commands, y)
 				inFlag = false
@@ -414,7 +457,7 @@ func argsMinusFirstX(args []string, x string) []string {
 	return args
 }
 
-// find the target command given the args and command tree
+// Find the target command given the args and command tree
 // Meant to be run on the highest node. Only searches down.
 func (c *Command) Find(args []string) (*Command, []string, error) {
 	if c == nil {
@@ -482,6 +525,7 @@ func (c *Command) Find(args []string) (*Command, []string, error) {
 	return commandFound, a, nil
 }
 
+// SuggestionsFor provides suggestions for the typedName.
 func (c *Command) SuggestionsFor(typedName string) []string {
 	suggestions := []string{}
 	for _, cmd := range c.commands {
@@ -502,32 +546,20 @@ func (c *Command) SuggestionsFor(typedName string) []string {
 	return suggestions
 }
 
+// VisitParents visits all parents of the command and invokes fn on each parent.
 func (c *Command) VisitParents(fn func(*Command)) {
-	var traverse func(*Command) *Command
-
-	traverse = func(x *Command) *Command {
-		if x != c {
-			fn(x)
-		}
-		if x.HasParent() {
-			return traverse(x.parent)
-		}
-		return x
+	if c.HasParent() {
+		fn(c.Parent())
+		c.Parent().VisitParents(fn)
 	}
-	traverse(c)
 }
 
+// Root finds root command.
 func (c *Command) Root() *Command {
-	var findRoot func(*Command) *Command
-
-	findRoot = func(x *Command) *Command {
-		if x.HasParent() {
-			return findRoot(x.parent)
-		}
-		return x
+	if c.HasParent() {
+		return c.Parent().Root()
 	}
-
-	return findRoot(c)
+	return c
 }
 
 // ArgsLenAtDash will return the length of f.Args at the moment when a -- was
@@ -553,7 +585,7 @@ func (c *Command) execute(a []string) (err error) {
 
 	err = c.ParseFlags(a)
 	if err != nil {
-		return err
+		return c.FlagErrorFunc()(c, err)
 	}
 	// If help is called, regardless of other flags, return we want help
 	// Also say we need help if the command isn't runnable.
@@ -630,18 +662,7 @@ func (c *Command) preRun() {
 	}
 }
 
-func (c *Command) errorMsgFromParse() string {
-	s := c.flagErrorBuf.String()
-
-	x := strings.Split(s, "\n")
-
-	if len(x) > 0 {
-		return x[0]
-	}
-	return ""
-}
-
-// Call execute to use the args (os.Args[1:] by default)
+// Execute Call execute to use the args (os.Args[1:] by default)
 // and run through the command tree finding appropriate matches
 // for commands and then corresponding flags.
 func (c *Command) Execute() error {
@@ -649,8 +670,8 @@ func (c *Command) Execute() error {
 	return err
 }
 
+// ExecuteC executes the command.
 func (c *Command) ExecuteC() (cmd *Command, err error) {
-
 	// Regardless of what command execute is called on, run on Root only
 	if c.HasParent() {
 		return c.Root().ExecuteC()
@@ -712,6 +733,7 @@ func (c *Command) ExecuteC() (cmd *Command, err error) {
 }
 
 func (c *Command) initHelpFlag() {
+	c.mergePersistentFlags()
 	if c.Flags().Lookup("help") == nil {
 		c.Flags().BoolP("help", "h", false, "help for "+c.Name())
 	}
@@ -734,7 +756,7 @@ func (c *Command) initHelpCmd() {
 			Run: func(c *Command, args []string) {
 				cmd, _, e := c.Root().Find(args)
 				if cmd == nil || e != nil {
-					c.Printf("Unknown help topic %#q.", args)
+					c.Printf("Unknown help topic %#q\n", args)
 					c.Root().Usage()
 				} else {
 					cmd.Help()
@@ -742,16 +764,18 @@ func (c *Command) initHelpCmd() {
 			},
 		}
 	}
+	c.RemoveCommand(c.helpCommand)
 	c.AddCommand(c.helpCommand)
 }
 
-// Used for testing
+// ResetCommands used for testing.
 func (c *Command) ResetCommands() {
 	c.commands = nil
 	c.helpCommand = nil
+	c.parentsPflags = nil
 }
 
-// Sorts commands by their names
+// Sorts commands by their names.
 type commandSorterByName []*Command
 
 func (c commandSorterByName) Len() int           { return len(c) }
@@ -831,18 +855,18 @@ main:
 	}
 }
 
-// Print is a convenience method to Print to the defined output, fallback to Stderr if not set
+// Print is a convenience method to Print to the defined output, fallback to Stderr if not set.
 func (c *Command) Print(i ...interface{}) {
 	fmt.Fprint(c.OutOrStderr(), i...)
 }
 
-// Println is a convenience method to Println to the defined output, fallback to Stderr if not set
+// Println is a convenience method to Println to the defined output, fallback to Stderr if not set.
 func (c *Command) Println(i ...interface{}) {
 	str := fmt.Sprintln(i...)
 	c.Print(str)
 }
 
-// Printf is a convenience method to Printf to the defined output, fallback to Stderr if not set
+// Printf is a convenience method to Printf to the defined output, fallback to Stderr if not set.
 func (c *Command) Printf(format string, i ...interface{}) {
 	str := fmt.Sprintf(format, i...)
 	c.Print(str)
@@ -859,7 +883,7 @@ func (c *Command) CommandPath() string {
 	return str
 }
 
-//The full usage for a given command (including parents)
+// UseLine puts out the full usage for a given command (including parents).
 func (c *Command) UseLine() string {
 	str := ""
 	if c.HasParent() {
@@ -868,8 +892,8 @@ func (c *Command) UseLine() string {
 	return str + c.Use
 }
 
-// For use in determining which flags have been assigned to which commands
-// and which persist
+// DebugFlags used to determine which flags have been assigned to which commands
+// and which persist.
 func (c *Command) DebugFlags() {
 	c.Println("DebugFlags called on", c.Name())
 	var debugflags func(*Command)
@@ -880,12 +904,8 @@ func (c *Command) DebugFlags() {
 		}
 		if x.HasFlags() {
 			x.flags.VisitAll(func(f *flag.Flag) {
-				if x.HasPersistentFlags() {
-					if x.persistentFlag(f.Name) == nil {
-						c.Println("  -"+f.Shorthand+",", "--"+f.Name, "["+f.DefValue+"]", "", f.Value, "  [L]")
-					} else {
-						c.Println("  -"+f.Shorthand+",", "--"+f.Name, "["+f.DefValue+"]", "", f.Value, "  [LP]")
-					}
+				if x.HasPersistentFlags() && x.persistentFlag(f.Name) != nil {
+					c.Println("  -"+f.Shorthand+",", "--"+f.Name, "["+f.DefValue+"]", "", f.Value, "  [LP]")
 				} else {
 					c.Println("  -"+f.Shorthand+",", "--"+f.Name, "["+f.DefValue+"]", "", f.Value, "  [L]")
 				}
@@ -902,7 +922,6 @@ func (c *Command) DebugFlags() {
 				}
 			})
 		}
-		c.Println(x.flagErrorBuf)
 		if x.HasSubCommands() {
 			for _, y := range x.commands {
 				debugflags(y)
@@ -923,7 +942,8 @@ func (c *Command) Name() string {
 	if i >= 0 {
 		name = name[:i]
 	}
-	return name
+	c.name = name
+	return c.name
 }
 
 // HasAlias determines if a given string is an alias of the command.
@@ -936,26 +956,28 @@ func (c *Command) HasAlias(s string) bool {
 	return false
 }
 
+// NameAndAliases returns string containing name and all aliases
 func (c *Command) NameAndAliases() string {
 	return strings.Join(append([]string{c.Name()}, c.Aliases...), ", ")
 }
 
+// HasExample determines if the command has example.
 func (c *Command) HasExample() bool {
 	return len(c.Example) > 0
 }
 
-// Runnable determines if the command is itself runnable
+// Runnable determines if the command is itself runnable.
 func (c *Command) Runnable() bool {
 	return c.Run != nil || c.RunE != nil
 }
 
-// HasSubCommands determines if the command has children commands
+// HasSubCommands determines if the command has children commands.
 func (c *Command) HasSubCommands() bool {
 	return len(c.commands) > 0
 }
 
 // IsAvailableCommand determines if a command is available as a non-help command
-// (this includes all non deprecated/hidden commands)
+// (this includes all non deprecated/hidden commands).
 func (c *Command) IsAvailableCommand() bool {
 	if len(c.Deprecated) != 0 || c.Hidden {
 		return false
@@ -972,11 +994,12 @@ func (c *Command) IsAvailableCommand() bool {
 	return false
 }
 
-// IsHelpCommand determines if a command is a 'help' command; a help command is
-// determined by the fact that it is NOT runnable/hidden/deprecated, and has no
-// sub commands that are runnable/hidden/deprecated
-func (c *Command) IsHelpCommand() bool {
-
+// IsAdditionalHelpTopicCommand determines if a command is an additional
+// help topic command; additional help topic command is determined by the
+// fact that it is NOT runnable/hidden/deprecated, and has no sub commands that
+// are runnable/hidden/deprecated.
+// Concrete example: https://github.com/spf13/cobra/issues/393#issuecomment-282741924.
+func (c *Command) IsAdditionalHelpTopicCommand() bool {
 	// if a command is runnable, deprecated, or hidden it is not a 'help' command
 	if c.Runnable() || len(c.Deprecated) != 0 || c.Hidden {
 		return false
@@ -984,7 +1007,7 @@ func (c *Command) IsHelpCommand() bool {
 
 	// if any non-help sub commands are found, the command is not a 'help' command
 	for _, sub := range c.commands {
-		if !sub.IsHelpCommand() {
+		if !sub.IsAdditionalHelpTopicCommand() {
 			return false
 		}
 	}
@@ -993,14 +1016,13 @@ func (c *Command) IsHelpCommand() bool {
 	return true
 }
 
-// HasHelpSubCommands determines if a command has any avilable 'help' sub commands
+// HasHelpSubCommands determines if a command has any available 'help' sub commands
 // that need to be shown in the usage/help default template under 'additional help
-// topics'
+// topics'.
 func (c *Command) HasHelpSubCommands() bool {
-
 	// return true on the first found available 'help' sub command
 	for _, sub := range c.commands {
-		if sub.IsHelpCommand() {
+		if sub.IsAdditionalHelpTopicCommand() {
 			return true
 		}
 	}
@@ -1010,9 +1032,8 @@ func (c *Command) HasHelpSubCommands() bool {
 }
 
 // HasAvailableSubCommands determines if a command has available sub commands that
-// need to be shown in the usage/help default template under 'available commands'
+// need to be shown in the usage/help default template under 'available commands'.
 func (c *Command) HasAvailableSubCommands() bool {
-
 	// return true on the first found available (non deprecated/help/hidden)
 	// sub command
 	for _, sub := range c.commands {
@@ -1026,29 +1047,28 @@ func (c *Command) HasAvailableSubCommands() bool {
 	return false
 }
 
-// Determine if the command is a child command
+// HasParent determines if the command is a child command.
 func (c *Command) HasParent() bool {
 	return c.parent != nil
 }
 
-// GlobalNormalizationFunc returns the global normalization function or nil if doesn't exists
+// GlobalNormalizationFunc returns the global normalization function or nil if doesn't exists.
 func (c *Command) GlobalNormalizationFunc() func(f *flag.FlagSet, name string) flag.NormalizedName {
 	return c.globNormFunc
 }
 
-// Get the complete FlagSet that applies to this command (local and persistent declared here and by all parents)
+// Flags returns the complete FlagSet that applies
+// to this command (local and persistent declared here and by all parents).
 func (c *Command) Flags() *flag.FlagSet {
 	if c.flags == nil {
 		c.flags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
-		if c.flagErrorBuf == nil {
-			c.flagErrorBuf = new(bytes.Buffer)
-		}
-		c.flags.SetOutput(c.flagErrorBuf)
+		c.flags.SetOutput(c.OutOrStderr())
 	}
+
 	return c.flags
 }
 
-// LocalNonPersistentFlags are flags specific to this command which will NOT persist to subcommands
+// LocalNonPersistentFlags are flags specific to this command which will NOT persist to subcommands.
 func (c *Command) LocalNonPersistentFlags() *flag.FlagSet {
 	persistentFlags := c.PersistentFlags()
 
@@ -1061,124 +1081,109 @@ func (c *Command) LocalNonPersistentFlags() *flag.FlagSet {
 	return out
 }
 
-// Get the local FlagSet specifically set in the current command
+// LocalFlags returns the local FlagSet specifically set in the current command.
 func (c *Command) LocalFlags() *flag.FlagSet {
 	c.mergePersistentFlags()
 
-	local := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
-	c.lflags.VisitAll(func(f *flag.Flag) {
-		local.AddFlag(f)
-	})
-	if !c.HasParent() {
-		flag.CommandLine.VisitAll(func(f *flag.Flag) {
-			if local.Lookup(f.Name) == nil {
-				local.AddFlag(f)
-			}
-		})
+	if c.lflags == nil {
+		c.lflags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+		c.lflags.SetOutput(c.OutOrStderr())
 	}
-	return local
+	c.lflags.SortFlags = c.Flags().SortFlags
+
+	addToLocal := func(f *flag.Flag) {
+		if c.lflags.Lookup(f.Name) == nil && c.parentsPflags.Lookup(f.Name) == nil {
+			c.lflags.AddFlag(f)
+		}
+	}
+	c.Flags().VisitAll(addToLocal)
+	c.PersistentFlags().VisitAll(addToLocal)
+	return c.lflags
 }
 
-// All Flags which were inherited from parents commands
+// InheritedFlags returns all flags which were inherited from parents commands.
 func (c *Command) InheritedFlags() *flag.FlagSet {
 	c.mergePersistentFlags()
 
-	inherited := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
-	local := c.LocalFlags()
-
-	var rmerge func(x *Command)
-
-	rmerge = func(x *Command) {
-		if x.HasPersistentFlags() {
-			x.PersistentFlags().VisitAll(func(f *flag.Flag) {
-				if inherited.Lookup(f.Name) == nil && local.Lookup(f.Name) == nil {
-					inherited.AddFlag(f)
-				}
-			})
-		}
-		if x.HasParent() {
-			rmerge(x.parent)
-		}
-	}
-
-	if c.HasParent() {
-		rmerge(c.parent)
+	if c.iflags == nil {
+		c.iflags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	}
 
-	return inherited
+	local := c.LocalFlags()
+	c.parentsPflags.VisitAll(func(f *flag.Flag) {
+		if c.iflags.Lookup(f.Name) == nil && local.Lookup(f.Name) == nil {
+			c.iflags.AddFlag(f)
+		}
+	})
+	return c.iflags
 }
 
-// All Flags which were not inherited from parent commands
+// NonInheritedFlags returns all flags which were not inherited from parent commands.
 func (c *Command) NonInheritedFlags() *flag.FlagSet {
 	return c.LocalFlags()
 }
 
-// Get the Persistent FlagSet specifically set in the current command
+// PersistentFlags returns the persistent FlagSet specifically set in the current command.
 func (c *Command) PersistentFlags() *flag.FlagSet {
 	if c.pflags == nil {
 		c.pflags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
-		if c.flagErrorBuf == nil {
-			c.flagErrorBuf = new(bytes.Buffer)
-		}
-		c.pflags.SetOutput(c.flagErrorBuf)
+		c.pflags.SetOutput(c.OutOrStderr())
 	}
 	return c.pflags
 }
 
-// For use in testing
+// ResetFlags is used in testing.
 func (c *Command) ResetFlags() {
-	c.flagErrorBuf = new(bytes.Buffer)
-	c.flagErrorBuf.Reset()
 	c.flags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
-	c.flags.SetOutput(c.flagErrorBuf)
+	c.flags.SetOutput(c.OutOrStderr())
 	c.pflags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
-	c.pflags.SetOutput(c.flagErrorBuf)
+	c.pflags.SetOutput(c.OutOrStderr())
 }
 
-// Does the command contain any flags (local plus persistent from the entire structure)
+// HasFlags checks if the command contains any flags (local plus persistent from the entire structure).
 func (c *Command) HasFlags() bool {
 	return c.Flags().HasFlags()
 }
 
-// Does the command contain persistent flags
+// HasPersistentFlags checks if the command contains persistent flags.
 func (c *Command) HasPersistentFlags() bool {
 	return c.PersistentFlags().HasFlags()
 }
 
-// Does the command has flags specifically declared locally
+// HasLocalFlags checks if the command has flags specifically declared locally.
 func (c *Command) HasLocalFlags() bool {
 	return c.LocalFlags().HasFlags()
 }
 
-// Does the command have flags inherited from its parent command
+// HasInheritedFlags checks if the command has flags inherited from its parent command.
 func (c *Command) HasInheritedFlags() bool {
 	return c.InheritedFlags().HasFlags()
 }
 
-// Does the command contain any flags (local plus persistent from the entire
-// structure) which are not hidden or deprecated
+// HasAvailableFlags checks if the command contains any flags (local plus persistent from the entire
+// structure) which are not hidden or deprecated.
 func (c *Command) HasAvailableFlags() bool {
 	return c.Flags().HasAvailableFlags()
 }
 
-// Does the command contain persistent flags which are not hidden or deprecated
+// HasAvailablePersistentFlags checks if the command contains persistent flags which are not hidden or deprecated.
 func (c *Command) HasAvailablePersistentFlags() bool {
 	return c.PersistentFlags().HasAvailableFlags()
 }
 
-// Does the command has flags specifically declared locally which are not hidden
-// or deprecated
+// HasAvailableLocalFlags checks if the command has flags specifically declared locally which are not hidden
+// or deprecated.
 func (c *Command) HasAvailableLocalFlags() bool {
 	return c.LocalFlags().HasAvailableFlags()
 }
 
-// Does the command have flags inherited from its parent command which are
-// not hidden or deprecated
+// HasAvailableInheritedFlags checks if the command has flags inherited from its parent command which are
+// not hidden or deprecated.
 func (c *Command) HasAvailableInheritedFlags() bool {
 	return c.InheritedFlags().HasAvailableFlags()
 }
 
-// Flag climbs up the command tree looking for matching flag
+// Flag climbs up the command tree looking for matching flag.
 func (c *Command) Flag(name string) (flag *flag.Flag) {
 	flag = c.Flags().Lookup(name)
 
@@ -1189,19 +1194,20 @@ func (c *Command) Flag(name string) (flag *flag.Flag) {
 	return
 }
 
-// recursively find matching persistent flag
+// Recursively find matching persistent flag.
 func (c *Command) persistentFlag(name string) (flag *flag.Flag) {
 	if c.HasPersistentFlags() {
 		flag = c.PersistentFlags().Lookup(name)
 	}
 
-	if flag == nil && c.HasParent() {
-		flag = c.parent.persistentFlag(name)
+	if flag == nil {
+		c.updateParentsPflags()
+		flag = c.parentsPflags.Lookup(name)
 	}
 	return
 }
 
-// ParseFlags parses persistent flag tree & local flags
+// ParseFlags parses persistent flag tree and local flags.
 func (c *Command) ParseFlags(args []string) (err error) {
 	if c.DisableFlagParsing {
 		return nil
@@ -1211,46 +1217,32 @@ func (c *Command) ParseFlags(args []string) (err error) {
 	return
 }
 
-// Parent returns a commands parent command
+// Parent returns a commands parent command.
 func (c *Command) Parent() *Command {
 	return c.parent
 }
 
+// mergePersistentFlags merges c.PersistentFlags() to c.Flags()
+// and adds missing persistent flags of all parents.
 func (c *Command) mergePersistentFlags() {
-	var rmerge func(x *Command)
+	c.Flags().AddFlagSet(c.PersistentFlags())
+	c.updateParentsPflags()
+	c.Flags().AddFlagSet(c.parentsPflags)
+}
 
-	// Save the set of local flags
-	if c.lflags == nil {
-		c.lflags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
-		if c.flagErrorBuf == nil {
-			c.flagErrorBuf = new(bytes.Buffer)
-		}
-		c.lflags.SetOutput(c.flagErrorBuf)
-		addtolocal := func(f *flag.Flag) {
-			c.lflags.AddFlag(f)
-		}
-		c.Flags().VisitAll(addtolocal)
-		c.PersistentFlags().VisitAll(addtolocal)
-	}
-	rmerge = func(x *Command) {
-		if !x.HasParent() {
-			flag.CommandLine.VisitAll(func(f *flag.Flag) {
-				if x.PersistentFlags().Lookup(f.Name) == nil {
-					x.PersistentFlags().AddFlag(f)
-				}
-			})
-		}
-		if x.HasPersistentFlags() {
-			x.PersistentFlags().VisitAll(func(f *flag.Flag) {
-				if c.Flags().Lookup(f.Name) == nil {
-					c.Flags().AddFlag(f)
-				}
-			})
-		}
-		if x.HasParent() {
-			rmerge(x.parent)
-		}
+// updateParentsPflags updates c.parentsPflags by adding
+// new persistent flags of all parents.
+// If c.parentsPflags == nil, it makes new.
+func (c *Command) updateParentsPflags() {
+	if c.parentsPflags == nil {
+		c.parentsPflags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+		c.parentsPflags.SetOutput(c.OutOrStderr())
+		c.parentsPflags.SortFlags = false
 	}
 
-	rmerge(c)
+	c.Root().PersistentFlags().AddFlagSet(flag.CommandLine)
+
+	c.VisitParents(func(parent *Command) {
+		c.parentsPflags.AddFlagSet(parent.PersistentFlags())
+	})
 }
diff --git a/doc/man_docs.go b/doc/man_docs.go
index b202029..1f90c44 100644
--- a/doc/man_docs.go
+++ b/doc/man_docs.go
@@ -30,14 +30,14 @@ import (
 
 // GenManTree will generate a man page for this command and all descendants
 // in the directory given. The header may be nil. This function may not work
-// correctly if your command names have - in them. If you have `cmd` with two
-// subcmds, `sub` and `sub-third`. And `sub` has a subcommand called `third`
+// correctly if your command names have `-` in them. If you have `cmd` with two
+// subcmds, `sub` and `sub-third`, and `sub` has a subcommand called `third`
 // it is undefined which help output will be in the file `cmd-sub-third.1`.
 func GenManTree(cmd *cobra.Command, header *GenManHeader, dir string) error {
 	return GenManTreeFromOpts(cmd, GenManTreeOptions{
 		Header:           header,
 		Path:             dir,
-		CommandSeparator: "_",
+		CommandSeparator: "-",
 	})
 }
 
@@ -49,7 +49,7 @@ func GenManTreeFromOpts(cmd *cobra.Command, opts GenManTreeOptions) error {
 		header = &GenManHeader{}
 	}
 	for _, c := range cmd.Commands() {
-		if !c.IsAvailableCommand() || c.IsHelpCommand() {
+		if !c.IsAvailableCommand() || c.IsAdditionalHelpTopicCommand() {
 			continue
 		}
 		if err := GenManTreeFromOpts(c, opts); err != nil {
@@ -66,7 +66,7 @@ func GenManTreeFromOpts(cmd *cobra.Command, opts GenManTreeOptions) error {
 		separator = opts.CommandSeparator
 	}
 	basename := strings.Replace(cmd.CommandPath(), " ", separator, -1)
-	filename := filepath.Join(opts.Path, basename + "." + section)
+	filename := filepath.Join(opts.Path, basename+"."+section)
 	f, err := os.Create(filename)
 	if err != nil {
 		return err
@@ -216,7 +216,7 @@ func genMan(cmd *cobra.Command, header *GenManHeader) []byte {
 		children := cmd.Commands()
 		sort.Sort(byName(children))
 		for _, c := range children {
-			if !c.IsAvailableCommand() || c.IsHelpCommand() {
+			if !c.IsAvailableCommand() || c.IsAdditionalHelpTopicCommand() {
 				continue
 			}
 			seealso := fmt.Sprintf("**%s-%s(%s)**", dashCommandName, c.Name(), header.Section)
diff --git a/doc/man_docs.md b/doc/man_docs.md
index 5fe957a..3709160 100644
--- a/doc/man_docs.md
+++ b/doc/man_docs.md
@@ -6,6 +6,8 @@ Generating man pages from a cobra command is incredibly easy. An example is as f
 package main
 
 import (
+	"log"
+
 	"github.com/spf13/cobra"
 	"github.com/spf13/cobra/doc"
 )
@@ -15,12 +17,15 @@ func main() {
 		Use:   "test",
 		Short: "my test program",
 	}
-	header := &cobra.GenManHeader{
+	header := &doc.GenManHeader{
 		Title: "MINE",
 		Section: "3",
 	}
-	doc.GenManTree(cmd, header, "/tmp")
+	err := doc.GenManTree(cmd, header, "/tmp")
+	if err != nil {
+		log.Fatal(err)
+	}
 }
 ```
 
-That will get you a man page `/tmp/test.1`
+That will get you a man page `/tmp/test.3`
diff --git a/doc/md_docs.go b/doc/md_docs.go
index fa13631..408d2f7 100644
--- a/doc/md_docs.go
+++ b/doc/md_docs.go
@@ -52,10 +52,12 @@ func printOptions(w io.Writer, cmd *cobra.Command, name string) error {
 	return nil
 }
 
+// GenMarkdown creates markdown output.
 func GenMarkdown(cmd *cobra.Command, w io.Writer) error {
 	return GenMarkdownCustom(cmd, w, func(s string) string { return s })
 }
 
+// GenMarkdownCustom creates custom markdown output.
 func GenMarkdownCustom(cmd *cobra.Command, w io.Writer, linkHandler func(string) string) error {
 	name := cmd.CommandPath()
 
@@ -119,7 +121,7 @@ func GenMarkdownCustom(cmd *cobra.Command, w io.Writer, linkHandler func(string)
 		sort.Sort(byName(children))
 
 		for _, child := range children {
-			if !child.IsAvailableCommand() || child.IsHelpCommand() {
+			if !child.IsAvailableCommand() || child.IsAdditionalHelpTopicCommand() {
 				continue
 			}
 			cname := name + " " + child.Name()
@@ -141,6 +143,12 @@ func GenMarkdownCustom(cmd *cobra.Command, w io.Writer, linkHandler func(string)
 	return nil
 }
 
+// GenMarkdownTree will generate a markdown page for this command and all
+// descendants in the directory given. The header may be nil.
+// This function may not work correctly if your command names have `-` in them.
+// If you have `cmd` with two subcmds, `sub` and `sub-third`,
+// and `sub` has a subcommand called `third`, it is undefined which
+// help output will be in the file `cmd-sub-third.1`.
 func GenMarkdownTree(cmd *cobra.Command, dir string) error {
 	identity := func(s string) string { return s }
 	emptyStr := func(s string) string { return "" }
@@ -149,7 +157,7 @@ func GenMarkdownTree(cmd *cobra.Command, dir string) error {
 
 func GenMarkdownTreeCustom(cmd *cobra.Command, dir string, filePrepender, linkHandler func(string) string) error {
 	for _, c := range cmd.Commands() {
-		if !c.IsAvailableCommand() || c.IsHelpCommand() {
+		if !c.IsAvailableCommand() || c.IsAdditionalHelpTopicCommand() {
 			continue
 		}
 		if err := GenMarkdownTreeCustom(c, dir, filePrepender, linkHandler); err != nil {
diff --git a/doc/md_docs.md b/doc/md_docs.md
index 0c3b96e..56ce9fe 100644
--- a/doc/md_docs.md
+++ b/doc/md_docs.md
@@ -6,6 +6,8 @@ Generating man pages from a cobra command is incredibly easy. An example is as f
 package main
 
 import (
+	"log"
+
 	"github.com/spf13/cobra"
 	"github.com/spf13/cobra/doc"
 )
@@ -15,7 +17,10 @@ func main() {
 		Use:   "test",
 		Short: "my test program",
 	}
-	doc.GenMarkdownTree(cmd, "/tmp")
+	err := doc.GenMarkdownTree(cmd, "/tmp")
+	if err != nil {
+		log.Fatal(err)
+	}
 }
 ```
 
@@ -29,18 +34,22 @@ This program can actually generate docs for the kubectl command in the kubernete
 package main
 
 import (
+	"log"
 	"io/ioutil"
 	"os"
 
-	kubectlcmd "k8s.io/kubernetes/pkg/kubectl/cmd"
+	"k8s.io/kubernetes/pkg/kubectl/cmd"
 	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
 
 	"github.com/spf13/cobra/doc"
 )
 
 func main() {
-	cmd := kubectlcmd.NewKubectlCommand(cmdutil.NewFactory(nil), os.Stdin, ioutil.Discard, ioutil.Discard)
-	doc.GenMarkdownTree(cmd, "./")
+	kubectl := cmd.NewKubectlCommand(cmdutil.NewFactory(nil), os.Stdin, ioutil.Discard, ioutil.Discard)
+	err := doc.GenMarkdownTree(kubectl, "./")
+	if err != nil {
+		log.Fatal(err)
+	}
 }
 ```
 
@@ -52,7 +61,10 @@ You may wish to have more control over the output, or only generate for a single
 
 ```go
 	out := new(bytes.Buffer)
-	doc.GenMarkdown(cmd, out)
+	err := doc.GenMarkdown(cmd, out)
+	if err != nil {
+		log.Fatal(err)
+	}
 ```
 
 This will write the markdown doc for ONLY "cmd" into the out, buffer.
@@ -101,4 +113,3 @@ linkHandler := func(name string) string {
 	return "/commands/" + strings.ToLower(base) + "/"
 }
 ```
-
diff --git a/doc/util.go b/doc/util.go
index a1c6b89..8d3dbec 100644
--- a/doc/util.go
+++ b/doc/util.go
@@ -13,7 +13,11 @@
 
 package doc
 
-import "github.com/spf13/cobra"
+import (
+	"strings"
+
+	"github.com/spf13/cobra"
+)
 
 // Test to see if we have a reason to print See Also information in docs
 // Basically this is a test for a parent commend or a subcommand which is
@@ -23,7 +27,7 @@ func hasSeeAlso(cmd *cobra.Command) bool {
 		return true
 	}
 	for _, c := range cmd.Commands() {
-		if !c.IsAvailableCommand() || c.IsHelpCommand() {
+		if !c.IsAvailableCommand() || c.IsAdditionalHelpTopicCommand() {
 			continue
 		}
 		return true
@@ -31,6 +35,15 @@ func hasSeeAlso(cmd *cobra.Command) bool {
 	return false
 }
 
+// Temporary workaround for yaml lib generating incorrect yaml with long strings
+// that do not contain \n.
+func forceMultiLine(s string) string {
+	if len(s) > 60 && !strings.Contains(s, "\n") {
+		s = s + "\n"
+	}
+	return s
+}
+
 type byName []*cobra.Command
 
 func (s byName) Len() int           { return len(s) }
diff --git a/doc/yaml_docs.go b/doc/yaml_docs.go
new file mode 100644
index 0000000..f5cd5a3
--- /dev/null
+++ b/doc/yaml_docs.go
@@ -0,0 +1,165 @@
+// Copyright 2016 French Ben. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package doc
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
+	"gopkg.in/yaml.v2"
+)
+
+type cmdOption struct {
+	Name         string
+	Shorthand    string `yaml:",omitempty"`
+	DefaultValue string `yaml:"default_value,omitempty"`
+	Usage        string `yaml:",omitempty"`
+}
+
+type cmdDoc struct {
+	Name             string
+	Synopsis         string      `yaml:",omitempty"`
+	Description      string      `yaml:",omitempty"`
+	Options          []cmdOption `yaml:",omitempty"`
+	InheritedOptions []cmdOption `yaml:"inherited_options,omitempty"`
+	Example          string      `yaml:",omitempty"`
+	SeeAlso          []string    `yaml:"see_also,omitempty"`
+}
+
+// GenYamlTree creates yaml structured ref files for this command and all descendants
+// in the directory given. This function may not work
+// correctly if your command names have `-` in them. If you have `cmd` with two
+// subcmds, `sub` and `sub-third`, and `sub` has a subcommand called `third`
+// it is undefined which help output will be in the file `cmd-sub-third.1`.
+func GenYamlTree(cmd *cobra.Command, dir string) error {
+	identity := func(s string) string { return s }
+	emptyStr := func(s string) string { return "" }
+	return GenYamlTreeCustom(cmd, dir, emptyStr, identity)
+}
+
+// GenYamlTreeCustom creates yaml structured ref files.
+func GenYamlTreeCustom(cmd *cobra.Command, dir string, filePrepender, linkHandler func(string) string) error {
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c.IsAdditionalHelpTopicCommand() {
+			continue
+		}
+		if err := GenYamlTreeCustom(c, dir, filePrepender, linkHandler); err != nil {
+			return err
+		}
+	}
+
+	basename := strings.Replace(cmd.CommandPath(), " ", "_", -1) + ".yaml"
+	filename := filepath.Join(dir, basename)
+	f, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	if _, err := io.WriteString(f, filePrepender(filename)); err != nil {
+		return err
+	}
+	if err := GenYamlCustom(cmd, f, linkHandler); err != nil {
+		return err
+	}
+	return nil
+}
+
+// GenYaml creates yaml output.
+func GenYaml(cmd *cobra.Command, w io.Writer) error {
+	return GenYamlCustom(cmd, w, func(s string) string { return s })
+}
+
+// GenYamlCustom creates custom yaml output.
+func GenYamlCustom(cmd *cobra.Command, w io.Writer, linkHandler func(string) string) error {
+	yamlDoc := cmdDoc{}
+	yamlDoc.Name = cmd.CommandPath()
+
+	yamlDoc.Synopsis = forceMultiLine(cmd.Short)
+	yamlDoc.Description = forceMultiLine(cmd.Long)
+
+	if len(cmd.Example) > 0 {
+		yamlDoc.Example = cmd.Example
+	}
+
+	flags := cmd.NonInheritedFlags()
+	if flags.HasFlags() {
+		yamlDoc.Options = genFlagResult(flags)
+	}
+	flags = cmd.InheritedFlags()
+	if flags.HasFlags() {
+		yamlDoc.InheritedOptions = genFlagResult(flags)
+	}
+
+	if hasSeeAlso(cmd) {
+		result := []string{}
+		if cmd.HasParent() {
+			parent := cmd.Parent()
+			result = append(result, parent.CommandPath()+" - "+parent.Short)
+		}
+		children := cmd.Commands()
+		sort.Sort(byName(children))
+		for _, child := range children {
+			if !child.IsAvailableCommand() || child.IsAdditionalHelpTopicCommand() {
+				continue
+			}
+			result = append(result, child.Name()+" - "+child.Short)
+		}
+		yamlDoc.SeeAlso = result
+	}
+
+	final, err := yaml.Marshal(&yamlDoc)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+	if _, err := fmt.Fprintf(w, string(final)); err != nil {
+		return err
+	}
+	return nil
+}
+
+func genFlagResult(flags *pflag.FlagSet) []cmdOption {
+	var result []cmdOption
+
+	flags.VisitAll(func(flag *pflag.Flag) {
+		// Todo, when we mark a shorthand is deprecated, but specify an empty message.
+		// The flag.ShorthandDeprecated is empty as the shorthand is deprecated.
+		// Using len(flag.ShorthandDeprecated) > 0 can't handle this, others are ok.
+		if !(len(flag.ShorthandDeprecated) > 0) && len(flag.Shorthand) > 0 {
+			opt := cmdOption{
+				flag.Name,
+				flag.Shorthand,
+				flag.DefValue,
+				forceMultiLine(flag.Usage),
+			}
+			result = append(result, opt)
+		} else {
+			opt := cmdOption{
+				Name:         flag.Name,
+				DefaultValue: forceMultiLine(flag.DefValue),
+				Usage:        forceMultiLine(flag.Usage),
+			}
+			result = append(result, opt)
+		}
+	})
+
+	return result
+}
diff --git a/doc/yaml_docs.md b/doc/yaml_docs.md
new file mode 100644
index 0000000..1a9b7c6
--- /dev/null
+++ b/doc/yaml_docs.md
@@ -0,0 +1,112 @@
+# Generating Yaml Docs For Your Own cobra.Command
+
+Generating yaml files from a cobra command is incredibly easy. An example is as follows:
+
+```go
+package main
+
+import (
+	"log"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/cobra/doc"
+)
+
+func main() {
+	cmd := &cobra.Command{
+		Use:   "test",
+		Short: "my test program",
+	}
+	err := doc.GenYamlTree(cmd, "/tmp")
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+```
+
+That will get you a Yaml document `/tmp/test.yaml`
+
+## Generate yaml docs for the entire command tree
+
+This program can actually generate docs for the kubectl command in the kubernetes project
+
+```go
+package main
+
+import (
+	"io/ioutil"
+	"log"
+	"os"
+
+	"k8s.io/kubernetes/pkg/kubectl/cmd"
+	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
+
+	"github.com/spf13/cobra/doc"
+)
+
+func main() {
+	kubectl := cmd.NewKubectlCommand(cmdutil.NewFactory(nil), os.Stdin, ioutil.Discard, ioutil.Discard)
+	err := doc.GenYamlTree(kubectl, "./")
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+```
+
+This will generate a whole series of files, one for each command in the tree, in the directory specified (in this case "./")
+
+## Generate yaml docs for a single command
+
+You may wish to have more control over the output, or only generate for a single command, instead of the entire command tree. If this is the case you may prefer to `GenYaml` instead of `GenYamlTree`
+
+```go
+	out := new(bytes.Buffer)
+	doc.GenYaml(cmd, out)
+```
+
+This will write the yaml doc for ONLY "cmd" into the out, buffer.
+
+## Customize the output
+
+Both `GenYaml` and `GenYamlTree` have alternate versions with callbacks to get some control of the output:
+
+```go
+func GenYamlTreeCustom(cmd *Command, dir string, filePrepender, linkHandler func(string) string) error {
+	//...
+}
+```
+
+```go
+func GenYamlCustom(cmd *Command, out *bytes.Buffer, linkHandler func(string) string) error {
+	//...
+}
+```
+
+The `filePrepender` will prepend the return value given the full filepath to the rendered Yaml file. A common use case is to add front matter to use the generated documentation with [Hugo](http://gohugo.io/):
+
+```go
+const fmTemplate = `---
+date: %s
+title: "%s"
+slug: %s
+url: %s
+---
+`
+
+filePrepender := func(filename string) string {
+	now := time.Now().Format(time.RFC3339)
+	name := filepath.Base(filename)
+	base := strings.TrimSuffix(name, path.Ext(name))
+	url := "/commands/" + strings.ToLower(base) + "/"
+	return fmt.Sprintf(fmTemplate, now, strings.Replace(base, "_", " ", -1), base, url)
+}
+```
+
+The `linkHandler` can be used to customize the rendered internal links to the commands, given a filename:
+
+```go
+linkHandler := func(name string) string {
+	base := strings.TrimSuffix(name, path.Ext(name))
+	return "/commands/" + strings.ToLower(base) + "/"
+}
+```


Test patch:
diff --git a/bash_completions_test.go b/bash_completions_test.go
index 5f4cb4d..185570b 100644
--- a/bash_completions_test.go
+++ b/bash_completions_test.go
@@ -155,7 +155,7 @@ func TestBashCompletionHiddenFlag(t *testing.T) {
 	cmdTrue.GenBashCompletion(out)
 	bashCompletion := out.String()
 	if strings.Contains(bashCompletion, flagName) {
-		t.Error("expected completion to not include %q flag: Got %v", flagName, bashCompletion)
+		t.Errorf("expected completion to not include %q flag: Got %v", flagName, bashCompletion)
 	}
 }
 
diff --git a/cobra_test.go b/cobra_test.go
index 881a621..d6593a5 100644
--- a/cobra_test.go
+++ b/cobra_test.go
@@ -3,7 +3,6 @@ package cobra
 import (
 	"bytes"
 	"fmt"
-	"os"
 	"reflect"
 	"runtime"
 	"strings"
@@ -13,9 +12,6 @@ import (
 	"github.com/spf13/pflag"
 )
 
-var _ = fmt.Println
-var _ = os.Stderr
-
 var tp, te, tt, t1, tr []string
 var rootPersPre, echoPre, echoPersPre, timesPersPre []string
 var flagb1, flagb2, flagb3, flagbr, flagbp bool
@@ -166,20 +162,22 @@ func flagInit() {
 	cmdRootWithRun.ResetFlags()
 	cmdSubNoRun.ResetFlags()
 	cmdCustomFlags.ResetFlags()
+	cmdVersion1.ResetFlags()
+	cmdVersion2.ResetFlags()
+
 	cmdRootNoRun.PersistentFlags().StringVarP(&flags2a, "strtwo", "t", "two", strtwoParentHelp)
-	cmdEcho.Flags().IntVarP(&flagi1, "intone", "i", 123, "help message for flag intone")
-	cmdTimes.Flags().IntVarP(&flagi2, "inttwo", "j", 234, "help message for flag inttwo")
-	cmdPrint.Flags().IntVarP(&flagi3, "intthree", "i", 345, "help message for flag intthree")
 	cmdCustomFlags.Flags().IntVar(&flagi4, "intfour", 456, "help message for flag intfour")
-	cmdEcho.PersistentFlags().StringVarP(&flags1, "strone", "s", "one", "help message for flag strone")
-	cmdEcho.PersistentFlags().BoolVarP(&flagbp, "persistentbool", "p", false, "help message for flag persistentbool")
-	cmdTimes.PersistentFlags().StringVarP(&flags2b, "strtwo", "t", "2", strtwoChildHelp)
-	cmdPrint.PersistentFlags().StringVarP(&flags3, "strthree", "s", "three", "help message for flag strthree")
 	cmdEcho.Flags().BoolVarP(&flagb1, "boolone", "b", true, "help message for flag boolone")
+	cmdEcho.Flags().IntVarP(&flagi1, "intone", "i", 123, "help message for flag intone")
+	cmdEcho.PersistentFlags().BoolVarP(&flagbp, "persistentbool", "p", false, "help message for flag persistentbool")
+	cmdEcho.PersistentFlags().StringVarP(&flags1, "strone", "s", "one", "help message for flag strone")
+	cmdPrint.Flags().IntVarP(&flagi3, "intthree", "i", 345, "help message for flag intthree")
 	cmdTimes.Flags().BoolVarP(&flagb2, "booltwo", "c", false, "help message for flag booltwo")
+	cmdTimes.Flags().IntVarP(&flagi2, "inttwo", "j", 234, "help message for flag inttwo")
+	cmdTimes.Flags().StringVarP(&flags2b, "strtwo", "t", "2", strtwoChildHelp)
+	cmdTimes.PersistentFlags().StringVarP(&flags2b, "strtwo", "t", "2", strtwoChildHelp)
 	cmdPrint.Flags().BoolVarP(&flagb3, "boolthree", "b", true, "help message for flag boolthree")
-	cmdVersion1.ResetFlags()
-	cmdVersion2.ResetFlags()
+	cmdPrint.PersistentFlags().StringVarP(&flags3, "strthree", "s", "three", "help message for flag strthree")
 }
 
 func commandInit() {
@@ -571,7 +569,7 @@ func TestChildCommandFlags(t *testing.T) {
 	if r.Error == nil {
 		t.Errorf("invalid input should generate error")
 	}
-	if !strings.Contains(r.Error.Error(), "invalid argument \"10E\" for i10E") {
+	if !strings.Contains(r.Error.Error(), "invalid syntax") {
 		t.Errorf("Wrong error message displayed, \n %s", r.Error)
 	}
 }
@@ -612,7 +610,7 @@ func TestSubcommandExecuteC(t *testing.T) {
 		Use: "echo message",
 		Run: func(c *Command, args []string) {
 			msg := strings.Join(args, " ")
-			c.Println(msg, msg)
+			c.Println(msg)
 		},
 	}
 
@@ -677,7 +675,7 @@ func TestPersistentFlags(t *testing.T) {
 	fullSetupTest("echo times -s again -c -p test here")
 
 	if strings.Join(tt, " ") != "test here" {
-		t.Errorf("flags didn't leave proper args remaining..%s given", tt)
+		t.Errorf("flags didn't leave proper args remaining. %s given", tt)
 	}
 
 	if flags1 != "again" {
@@ -858,7 +856,6 @@ func TestFlagAccess(t *testing.T) {
 	}
 	if inherited.Lookup("strtwo") != nil {
 		t.Errorf("InheritedFlags shouldn not contain overwritten flag strtwo")
-
 	}
 }
 
@@ -916,15 +913,14 @@ func TestRootUnknownCommand(t *testing.T) {
 
 func TestRootUnknownCommandSilenced(t *testing.T) {
 	r := noRRSetupTestSilenced("bogus")
-	s := "Run 'cobra-test --help' for usage.\n"
 
 	if r.Output != "" {
-		t.Errorf("Unexpected response.\nExpecting to be: \n\"\"\n Got:\n %q\n", s, r.Output)
+		t.Errorf("Unexpected response.\nExpecting to be: \n\"\"\n Got:\n %q\n", r.Output)
 	}
 
 	r = noRRSetupTestSilenced("--strtwo=a bogus")
 	if r.Output != "" {
-		t.Errorf("Unexpected response.\nExpecting to be:\n\"\"\nGot:\n %q\n", s, r.Output)
+		t.Errorf("Unexpected response.\nExpecting to be:\n\"\"\nGot:\n %q\n", r.Output)
 	}
 }
 
@@ -991,7 +987,7 @@ func TestFlagsBeforeCommand(t *testing.T) {
 
 	// With parsing error properly reported
 	x = fullSetupTest("-i10E echo")
-	if !strings.Contains(x.Error.Error(), "invalid argument \"10E\" for i10E") {
+	if !strings.Contains(x.Error.Error(), "invalid syntax") {
 		t.Errorf("Wrong error message displayed, \n %s", x.Error)
 	}
 
@@ -1186,3 +1182,23 @@ func TestUsageIsNotPrintedTwice(t *testing.T) {
 		t.Error("Usage output is not printed exactly once")
 	}
 }
+
+func BenchmarkInheritedFlags(b *testing.B) {
+	initialize()
+	cmdEcho.AddCommand(cmdTimes)
+	b.ResetTimer()
+
+	for i := 0; i < b.N; i++ {
+		cmdTimes.InheritedFlags()
+	}
+}
+
+func BenchmarkLocalFlags(b *testing.B) {
+	initialize()
+	cmdEcho.AddCommand(cmdTimes)
+	b.ResetTimer()
+
+	for i := 0; i < b.N; i++ {
+		cmdTimes.LocalFlags()
+	}
+}
diff --git a/command_test.go b/command_test.go
index 127ca0e..3921a0b 100644
--- a/command_test.go
+++ b/command_test.go
@@ -1,9 +1,13 @@
 package cobra
 
 import (
+	"bytes"
+	"fmt"
 	"os"
 	"reflect"
 	"testing"
+
+	"github.com/spf13/pflag"
 )
 
 // test to ensure hidden commands run as intended
@@ -134,6 +138,20 @@ func Test_DisableFlagParsing(t *testing.T) {
 	}
 }
 
+func TestInitHelpFlagMergesFlags(t *testing.T) {
+	usage := "custom flag"
+	baseCmd := Command{Use: "testcmd"}
+	baseCmd.PersistentFlags().Bool("help", false, usage)
+	cmd := Command{Use: "do"}
+	baseCmd.AddCommand(&cmd)
+
+	cmd.initHelpFlag()
+	actual := cmd.Flags().Lookup("help").Usage
+	if actual != usage {
+		t.Fatalf("Expected the help flag from the base command with usage '%s', but got the default with usage '%s'", usage, actual)
+	}
+}
+
 func TestCommandsAreSorted(t *testing.T) {
 	EnableCommandSorting = true
 
@@ -142,11 +160,11 @@ func TestCommandsAreSorted(t *testing.T) {
 
 	var tmpCommand = &Command{Use: "tmp"}
 
-	for _, name := range(originalNames) {
+	for _, name := range originalNames {
 		tmpCommand.AddCommand(&Command{Use: name})
 	}
 
-	for i, c := range(tmpCommand.Commands()) {
+	for i, c := range tmpCommand.Commands() {
 		if expectedNames[i] != c.Name() {
 			t.Errorf("expected: %s, got: %s", expectedNames[i], c.Name())
 		}
@@ -162,11 +180,11 @@ func TestEnableCommandSortingIsDisabled(t *testing.T) {
 
 	var tmpCommand = &Command{Use: "tmp"}
 
-	for _, name := range(originalNames) {
+	for _, name := range originalNames {
 		tmpCommand.AddCommand(&Command{Use: name})
 	}
 
-	for i, c := range(tmpCommand.Commands()) {
+	for i, c := range tmpCommand.Commands() {
 		if originalNames[i] != c.Name() {
 			t.Errorf("expected: %s, got: %s", originalNames[i], c.Name())
 		}
@@ -174,3 +192,69 @@ func TestEnableCommandSortingIsDisabled(t *testing.T) {
 
 	EnableCommandSorting = true
 }
+
+func TestSetOutput(t *testing.T) {
+	cmd := &Command{}
+	cmd.SetOutput(nil)
+	if out := cmd.OutOrStdout(); out != os.Stdout {
+		t.Fatalf("expected setting output to nil to revert back to stdout, got %v", out)
+	}
+}
+
+func TestFlagErrorFunc(t *testing.T) {
+	cmd := &Command{
+		Use: "print",
+		RunE: func(cmd *Command, args []string) error {
+			return nil
+		},
+	}
+	expectedFmt := "This is expected: %s"
+
+	cmd.SetFlagErrorFunc(func(c *Command, err error) error {
+		return fmt.Errorf(expectedFmt, err)
+	})
+	cmd.SetArgs([]string{"--bogus-flag"})
+	cmd.SetOutput(new(bytes.Buffer))
+
+	err := cmd.Execute()
+
+	expected := fmt.Sprintf(expectedFmt, "unknown flag: --bogus-flag")
+	if err.Error() != expected {
+		t.Errorf("expected %v, got %v", expected, err.Error())
+	}
+}
+
+// TestSortedFlags checks,
+// if cmd.LocalFlags() is unsorted when cmd.Flags().SortFlags set to false.
+// https://github.com/spf13/cobra/issues/404
+func TestSortedFlags(t *testing.T) {
+	cmd := &Command{}
+	cmd.Flags().SortFlags = false
+	names := []string{"C", "B", "A", "D"}
+	for _, name := range names {
+		cmd.Flags().Bool(name, false, "")
+	}
+
+	i := 0
+	cmd.LocalFlags().VisitAll(func(f *pflag.Flag) {
+		if i == len(names) {
+			return
+		}
+		if contains(f.Name, names) {
+			if names[i] != f.Name {
+				t.Errorf("Incorrect order. Expected %v, got %v", names[i], f.Name)
+			}
+			i++
+		}
+	})
+}
+
+// contains checks, if s is in ss.
+func contains(s string, ss []string) bool {
+	for _, v := range ss {
+		if v == s {
+			return true
+		}
+	}
+	return false
+}
diff --git a/doc/man_docs_test.go b/doc/man_docs_test.go
index 26b8fcc..9b27291 100644
--- a/doc/man_docs_test.go
+++ b/doc/man_docs_test.go
@@ -13,9 +13,6 @@ import (
 	"github.com/spf13/cobra"
 )
 
-var _ = fmt.Println
-var _ = os.Stderr
-
 func translate(in string) string {
 	return strings.Replace(in, "-", "\\-", -1)
 }
@@ -153,7 +150,7 @@ func TestGenManTree(t *testing.T) {
 	header := &GenManHeader{Section: "2"}
 	tmpdir, err := ioutil.TempDir("", "test-gen-man-tree")
 	if err != nil {
-		t.Fatalf("Failed to create tempdir: %s", err.Error())
+		t.Fatalf("Failed to create tmpdir: %s", err.Error())
 	}
 	defer os.RemoveAll(tmpdir)
 
diff --git a/doc/man_examples_test.go b/doc/man_examples_test.go
index 3593853..db66042 100644
--- a/doc/man_examples_test.go
+++ b/doc/man_examples_test.go
@@ -8,7 +8,7 @@ import (
 	"github.com/spf13/cobra/doc"
 )
 
-func ExampleCommand_GenManTree() {
+func ExampleGenManTree() {
 	cmd := &cobra.Command{
 		Use:   "test",
 		Short: "my test program",
@@ -20,7 +20,7 @@ func ExampleCommand_GenManTree() {
 	doc.GenManTree(cmd, header, "/tmp")
 }
 
-func ExampleCommand_GenMan() {
+func ExampleGenMan() {
 	cmd := &cobra.Command{
 		Use:   "test",
 		Short: "my test program",
diff --git a/doc/md_docs_test.go b/doc/md_docs_test.go
index 86ee029..f4f3bc1 100644
--- a/doc/md_docs_test.go
+++ b/doc/md_docs_test.go
@@ -2,14 +2,14 @@ package doc
 
 import (
 	"bytes"
-	"fmt"
+	"io/ioutil"
 	"os"
+	"path/filepath"
 	"strings"
 	"testing"
-)
 
-var _ = fmt.Println
-var _ = os.Stderr
+	"github.com/spf13/cobra"
+)
 
 func TestGenMdDoc(t *testing.T) {
 	c := initializeWithRootCmd()
@@ -86,3 +86,22 @@ func TestGenMdNoTag(t *testing.T) {
 	checkStringOmits(t, found, unexpected)
 
 }
+
+func TestGenMdTree(t *testing.T) {
+	cmd := &cobra.Command{
+		Use: "do [OPTIONS] arg1 arg2",
+	}
+	tmpdir, err := ioutil.TempDir("", "test-gen-md-tree")
+	if err != nil {
+		t.Fatalf("Failed to create tmpdir: %s", err.Error())
+	}
+	defer os.RemoveAll(tmpdir)
+
+	if err := GenMarkdownTree(cmd, tmpdir); err != nil {
+		t.Fatalf("GenMarkdownTree failed: %s", err.Error())
+	}
+
+	if _, err := os.Stat(filepath.Join(tmpdir, "do.md")); err != nil {
+		t.Fatalf("Expected file 'do.md' to exist")
+	}
+}
diff --git a/doc/yaml_docs_test.go b/doc/yaml_docs_test.go
new file mode 100644
index 0000000..fb969da
--- /dev/null
+++ b/doc/yaml_docs_test.go
@@ -0,0 +1,108 @@
+package doc
+
+import (
+	"bytes"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/spf13/cobra"
+)
+
+func TestGenYamlDoc(t *testing.T) {
+	c := initializeWithRootCmd()
+	// Need two commands to run the command alphabetical sort
+	cmdEcho.AddCommand(cmdTimes, cmdEchoSub, cmdDeprecated)
+	c.AddCommand(cmdPrint, cmdEcho)
+	cmdRootWithRun.PersistentFlags().StringVarP(&flags2a, "rootflag", "r", "two", strtwoParentHelp)
+
+	out := new(bytes.Buffer)
+
+	// We generate on s subcommand so we have both subcommands and parents
+	if err := GenYaml(cmdEcho, out); err != nil {
+		t.Fatal(err)
+	}
+	found := out.String()
+
+	// Our description
+	expected := cmdEcho.Long
+	if !strings.Contains(found, expected) {
+		t.Errorf("Unexpected response.\nExpecting to contain: \n %q\nGot:\n %q\n", expected, found)
+	}
+
+	// Better have our example
+	expected = cmdEcho.Example
+	if !strings.Contains(found, expected) {
+		t.Errorf("Unexpected response.\nExpecting to contain: \n %q\nGot:\n %q\n", expected, found)
+	}
+
+	// A local flag
+	expected = "boolone"
+	if !strings.Contains(found, expected) {
+		t.Errorf("Unexpected response.\nExpecting to contain: \n %q\nGot:\n %q\n", expected, found)
+	}
+
+	// persistent flag on parent
+	expected = "rootflag"
+	if !strings.Contains(found, expected) {
+		t.Errorf("Unexpected response.\nExpecting to contain: \n %q\nGot:\n %q\n", expected, found)
+	}
+
+	// We better output info about our parent
+	expected = cmdRootWithRun.Short
+	if !strings.Contains(found, expected) {
+		t.Errorf("Unexpected response.\nExpecting to contain: \n %q\nGot:\n %q\n", expected, found)
+	}
+
+	// And about subcommands
+	expected = cmdEchoSub.Short
+	if !strings.Contains(found, expected) {
+		t.Errorf("Unexpected response.\nExpecting to contain: \n %q\nGot:\n %q\n", expected, found)
+	}
+
+	unexpected := cmdDeprecated.Short
+	if strings.Contains(found, unexpected) {
+		t.Errorf("Unexpected response.\nFound: %v\nBut should not have!!\n", unexpected)
+	}
+}
+
+func TestGenYamlNoTag(t *testing.T) {
+	c := initializeWithRootCmd()
+	// Need two commands to run the command alphabetical sort
+	cmdEcho.AddCommand(cmdTimes, cmdEchoSub, cmdDeprecated)
+	c.AddCommand(cmdPrint, cmdEcho)
+	c.DisableAutoGenTag = true
+	cmdRootWithRun.PersistentFlags().StringVarP(&flags2a, "rootflag", "r", "two", strtwoParentHelp)
+	out := new(bytes.Buffer)
+
+	if err := GenYaml(c, out); err != nil {
+		t.Fatal(err)
+	}
+	found := out.String()
+
+	unexpected := "Auto generated"
+	checkStringOmits(t, found, unexpected)
+
+}
+
+func TestGenYamlTree(t *testing.T) {
+	cmd := &cobra.Command{
+		Use: "do [OPTIONS] arg1 arg2",
+	}
+
+	tmpdir, err := ioutil.TempDir("", "test-gen-yaml-tree")
+	if err != nil {
+		t.Fatalf("Failed to create tmpdir: %s", err.Error())
+	}
+	defer os.RemoveAll(tmpdir)
+
+	if err := GenYamlTree(cmd, tmpdir); err != nil {
+		t.Fatalf("GenYamlTree failed: %s", err.Error())
+	}
+
+	if _, err := os.Stat(filepath.Join(tmpdir, "do.yaml")); err != nil {
+		t.Fatalf("Expected file 'do.yaml' to exist")
+	}
+}