Repository: spf13/viper
Pull request #1147 (2021-06-01 14:14:54)

fix: made `InConfig` process paths correctly
Fixes https://github.com/spf13/viper/issues/884

`InConfig` starts to process paths instead of treating them strictly as keys to the `v.config` map

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github-actions[bot]: 👋 Thanks for contributing to Viper! You are awesome! 🎉

A maintainer will take a look at your pull request shortly. 👀

In the meantime: We are working on **Viper v2** and we would love to hear your thoughts about what you like or don't like about Viper, so we can improve or fix those issues.

⏰ If you have a couple minutes, please take some time and share your thoughts: https://forms.gle/R6faU74qPRPAzchZ9

📣 If you've already given us your feedback, you can still help by spreading the news,
either by sharing the above link or telling people about this on Twitter:

https://twitter.com/sagikazarmark/status/1306904078967074816

**Thank you!** ❤️


Patch:
diff --git a/.github/.editorconfig b/.github/.editorconfig
index 7bd3346..0902c6a 100644
--- a/.github/.editorconfig
+++ b/.github/.editorconfig
@@ -1,2 +1,2 @@
-[*.yml]
+[{*.yml,*.yaml}]
 indent_size = 2
diff --git a/.github/ISSUE_TEMPLATE/bug_report.md b/.github/ISSUE_TEMPLATE/bug_report.md
deleted file mode 100644
index de8e272..0000000
--- a/.github/ISSUE_TEMPLATE/bug_report.md
+++ /dev/null
@@ -1,34 +0,0 @@
----
-name: 🐛 Bug report
-about: Report a bug to help us improve Viper
-labels: kind/bug
----
-<!--
-Thank you for sending a bug report! Here are some tips:
-
-1. Please fill out the template below to make it easier to debug your problem.
-2. If you are not sure if it is a bug or not, you can ask in the Gophers slack channel `#viper`.
--->
-
-**Expected behavior (what you expected to happen)**:
-
-**Actual behavior (what actually happened)**:
-
-**Repl.it link**:
-<!-- you can use the following example: https://repl.it/@sagikazarmark/Viper-example -->
-
-**Code reproducing the issue**:
-<!-- just to make sure the content of the repl doesn't get lost -->
-
-```go
-
-```
-
-<!-- include configuration file example if necessary -->
-
-**Environment**:
-- Viper version:
-- Config source: <!-- flag, env, file, etc -->
-- File format: <!-- JSON, YAML, TOML, etc -->
-
-**Anything else we should know?**:
diff --git a/.github/ISSUE_TEMPLATE/bug_report.yaml b/.github/ISSUE_TEMPLATE/bug_report.yaml
new file mode 100644
index 0000000..a893b01
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/bug_report.yaml
@@ -0,0 +1,117 @@
+name: 🐛 Bug report
+description: Report a bug to help us improve Viper
+labels: [kind/bug]
+body:
+- type: markdown
+  attributes:
+    value: |
+      Thank you for submitting a bug report!
+
+      Please fill out the template below to make it easier to debug your problem.
+
+      If you are not sure if it is a bug or not, you can contact us via the available [support channels](https://github.com/spf13/viper/issues/new/choose).
+- type: checkboxes
+  attributes:
+    label: Preflight Checklist
+    description: Please ensure you've completed all of the following.
+    options:
+      - label: I have searched the [issue tracker](https://www.github.com/spf13/viper/issues) for an issue that matches the one I want to file, without success.
+        required: true
+      - label: I am not looking for support or already pursued the available [support channels](https://github.com/spf13/viper/issues/new/choose) without success.
+        required: true
+- type: input
+  attributes:
+    label: Viper Version
+    description: What version of Viper are you using?
+    placeholder: 1.8.1
+  validations:
+    required: true
+- type: input
+  attributes:
+    label: Go Version
+    description: What version of Go are you using?
+    placeholder: "1.16"
+  validations:
+    required: true
+- type: dropdown
+  attributes:
+    label: Config Source
+    description: What sources do you load configuration from?
+    options:
+      - Manual set
+      - Flags
+      - Environment variables
+      - Files
+      - Remove K/V stores
+      - Defaults
+    multiple: true
+  validations:
+    required: true
+- type: dropdown
+  attributes:
+    label: Format
+    description: Which file formats do you use?
+    options:
+      - JSON
+      - YAML
+      - TOML
+      - Dotenv
+      - HCL
+      - Java properties
+      - INI
+      - Other (specify below)
+    multiple: true
+- type: input
+  attributes:
+    label: Repl.it link
+    description: Complete example on Repl.it reproducing the issue. [Here](https://repl.it/@sagikazarmark/Viper-example) is an example you can use.
+    placeholder: https://repl.it/@sagikazarmark/Viper-example
+- type: textarea
+  attributes:
+    label: Code reproducing the issue
+    description: Please provide a Repl.it link if possible.
+    render: go
+    placeholder: |
+      package main
+
+      import (
+        "github.com/spf13/viper"
+      )
+
+      func main() {
+        v := viper.New()
+
+        // ...
+
+        var config Config
+
+        err = v.Unmarshal(&config)
+        if err != nil {
+          panic(err)
+        }
+      }
+- type: textarea
+  attributes:
+    label: Expected Behavior
+    description: A clear and concise description of what you expected to happen.
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Actual Behavior
+    description: A clear description of what actually happens.
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Steps To Reproduce
+    description: Steps to reproduce the behavior if it is not self-explanatory.
+    placeholder: |
+      1. In this environment...
+      2. With this config...
+      3. Run '...'
+      4. See error...
+- type: textarea
+  attributes:
+    label: Additional Information
+    description: Links? References? Anything that will give us more context about the issue that you are encountering!
diff --git a/.github/ISSUE_TEMPLATE/feature_request.md b/.github/ISSUE_TEMPLATE/feature_request.md
deleted file mode 100644
index 22056f9..0000000
--- a/.github/ISSUE_TEMPLATE/feature_request.md
+++ /dev/null
@@ -1,21 +0,0 @@
----
-name: 🚀 Feature request
-about: Suggest an idea for Viper
-labels: kind/enhancement
----
-<!--
- Thank you for sending a feature request!
- Please describe what you would like to change/add and why in detail by filling out the template below.
- -->
-
-**Is your feature request related to a problem? Please describe.**
-<!-- A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] -->
-
-**Describe the solution you'd like to see**
-<!-- A clear and concise description of what would you like to happen. -->
-
-**Describe alternatives you've considered**
-<!-- A clear and concise description of any alternative solutions or features you've considered. -->
-
-**Additional context**
-<!-- Add any other context or screenshots about the feature request here. -->
diff --git a/.github/ISSUE_TEMPLATE/feature_request.yaml b/.github/ISSUE_TEMPLATE/feature_request.yaml
new file mode 100644
index 0000000..a2e4e74
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/feature_request.yaml
@@ -0,0 +1,39 @@
+name: 🚀 Feature request
+description: Suggest an idea for Viper
+labels: [kind/enhancement]
+body:
+- type: markdown
+  attributes:
+    value: |
+      Thank you for submitting a feature request!
+
+      Please describe what you would like to change/add and why in detail by filling out the template below.
+
+      If you are not sure if your request fits into Viper, you can contact us via the available [support channels](https://github.com/spf13/viper/issues/new/choose).
+- type: checkboxes
+  attributes:
+    label: Preflight Checklist
+    description: Please ensure you've completed all of the following.
+    options:
+      - label: I have searched the [issue tracker](https://www.github.com/spf13/viper/issues) for an issue that matches the one I want to file, without success.
+        required: true
+- type: textarea
+  attributes:
+    label: Problem Description
+    description: A clear and concise description of the problem you are seeking to solve with this feature request.
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Proposed Solution
+    description: A clear and concise description of what would you like to happen.
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Alternatives Considered
+    description: A clear and concise description of any alternative solutions or features you've considered.
+- type: textarea
+  attributes:
+    label: Additional Information
+    description: Add any other context about the problem here.
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..2f85879
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,16 @@
+version: 2
+
+updates:
+  - package-ecosystem: gomod
+    directory: /
+    labels:
+      - area/dependencies
+    schedule:
+      interval: daily
+
+  - package-ecosystem: github-actions
+    directory: /
+    labels:
+      - area/dependencies
+    schedule:
+      interval: daily
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e0a6260..5267fe2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
-        go: ['1.14', '1.15', '1.16']
+        go: ['1.14', '1.15', '1.16', '1.17']
     env:
       VERBOSE: 1
       GOFLAGS: -mod=readonly
diff --git a/.github/workflows/codeql-analysis.yaml b/.github/workflows/codeql-analysis.yaml
new file mode 100644
index 0000000..60bf45c
--- /dev/null
+++ b/.github/workflows/codeql-analysis.yaml
@@ -0,0 +1,72 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ master ]
+  schedule:
+    - cron: '22 16 * * 3'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'go' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
+        # Learn more:
+        # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v1
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v1
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    #- run: |
+    #   make bootstrap
+    #   make release
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v1
+
diff --git a/.github/workflows/feedback_issue.yml b/.github/workflows/feedback_issue.yml
index 5730d86..c329b39 100644
--- a/.github/workflows/feedback_issue.yml
+++ b/.github/workflows/feedback_issue.yml
@@ -6,7 +6,7 @@ jobs:
   comment:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/github-script@v3
+      - uses: actions/github-script@v4
         with:
           github-token: ${{secrets.GITHUB_TOKEN}}
           script: |
diff --git a/.github/workflows/feedback_pull_request.yml b/.github/workflows/feedback_pull_request.yml
index 807b573..bd3b225 100644
--- a/.github/workflows/feedback_pull_request.yml
+++ b/.github/workflows/feedback_pull_request.yml
@@ -6,7 +6,7 @@ jobs:
   comment:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/github-script@v3
+      - uses: actions/github-script@v4
         with:
           github-token: ${{secrets.GITHUB_TOKEN}}
           script: |
diff --git a/.github/workflows/wasm.yml b/.github/workflows/wasm.yml
index 333eb69..20e04b8 100644
--- a/.github/workflows/wasm.yml
+++ b/.github/workflows/wasm.yml
@@ -17,7 +17,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: '1.16'
+          go-version: '1.17'
 
       - name: Checkout code
         uses: actions/checkout@v2
diff --git a/.golangci.yml b/.golangci.yml
index a7b7381..4f970ac 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -16,6 +16,7 @@ linters:
         - deadcode
         - dogsled
         - dupl
+        - durationcheck
         - exhaustive
         - exportloopref
         - gci
@@ -23,29 +24,41 @@ linters:
         - gofmt
         - gofumpt
         - goimports
-        - golint
+        - gomoddirectives
         - goprintffuncname
         - govet
+        - importas
         - ineffassign
+        - makezero
         - misspell
         - nakedret
+        - nilerr
         - noctx
         - nolintlint
         - prealloc
+        - predeclared
+        - revive
         - rowserrcheck
         - sqlclosecheck
         - staticcheck
         - structcheck
         - stylecheck
+        - tparallel
         - typecheck
         - unconvert
         - unparam
         - unused
         - varcheck
+        - wastedassign
         - whitespace
 
         # fixme
+        # - cyclop
         # - errcheck
+        # - errorlint
+        # - exhaustivestruct
+        # - forbidigo
+        # - forcetypeassert
         # - gochecknoglobals
         # - gochecknoinits
         # - gocognit
@@ -54,9 +67,13 @@ linters:
         # - godot
         # - gosec
         # - gosimple
+        # - ifshort
         # - lll
         # - nlreturn
+        # - paralleltest
         # - scopelint
+        # - thelper
+        # - wrapcheck
 
         # unused
         # - depguard
diff --git a/Makefile b/Makefile
index b1796c9..b0f9acf 100644
--- a/Makefile
+++ b/Makefile
@@ -15,8 +15,8 @@ TEST_FORMAT = short-verbose
 endif
 
 # Dependency versions
-GOTESTSUM_VERSION = 0.5.3
-GOLANGCI_VERSION = 1.31.0
+GOTESTSUM_VERSION = 1.6.4
+GOLANGCI_VERSION = 1.40.1
 
 # Add the ability to override some variables
 # Use with care
diff --git a/README.md b/README.md
index 82bff12..97654df 100644
--- a/README.md
+++ b/README.md
@@ -119,7 +119,7 @@ viper.AddConfigPath("$HOME/.appname")  // call multiple times to add many search
 viper.AddConfigPath(".")               // optionally look for config in the working directory
 err := viper.ReadInConfig() // Find and read the config file
 if err != nil { // Handle errors reading the config file
-	panic(fmt.Errorf("Fatal error config file: %s \n", err))
+	panic(fmt.Errorf("Fatal error config file: %w \n", err))
 }
 ```
 
@@ -175,10 +175,10 @@ Optionally you can provide a function for Viper to run each time a change occurs
 **Make sure you add all of the configPaths prior to calling `WatchConfig()`**
 
 ```go
-viper.WatchConfig()
 viper.OnConfigChange(func(e fsnotify.Event) {
 	fmt.Println("Config file changed:", e.Name)
 })
+viper.WatchConfig()
 ```
 
 ### Reading Config from io.Reader
@@ -778,6 +778,15 @@ if err != nil {
 
 Viper uses [github.com/mitchellh/mapstructure](https://github.com/mitchellh/mapstructure) under the hood for unmarshaling values which uses `mapstructure` tags by default.
 
+### Decoding custom formats
+
+A frequently requested feature for Viper is adding more value formats and decoders.
+For example, parsing character (dot, comma, semicolon, etc) separated strings into slices.
+
+This is already available in Viper using mapstructure decode hooks.
+
+Read more about the details in [this blog post](https://sagikazarmark.hu/blog/decoding-custom-formats-with-viper/).
+
 ### Marshalling to string
 
 You may need to marshal all the settings held in viper into a string rather than write them to a file.
diff --git a/go.mod b/go.mod
index 812e7f3..aa00f70 100644
--- a/go.mod
+++ b/go.mod
@@ -3,25 +3,18 @@ module github.com/spf13/viper
 go 1.12
 
 require (
-	github.com/bketelsen/crypt v0.0.3-0.20200106085610-5cbc8cc4026c
-	github.com/coreos/bbolt v1.3.2 // indirect
-	github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e // indirect
-	github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f // indirect
-	github.com/fsnotify/fsnotify v1.4.7
+	github.com/fsnotify/fsnotify v1.5.1
 	github.com/hashicorp/hcl v1.0.0
-	github.com/magiconair/properties v1.8.1
-	github.com/mitchellh/mapstructure v1.3.3
-	github.com/pelletier/go-toml v1.2.0
-	github.com/prometheus/client_golang v1.10.0 // indirect
-	github.com/sirupsen/logrus v1.8.1 // indirect
-	github.com/soheilhy/cmux v0.1.5 // indirect
-	github.com/spf13/afero v1.5.1
-	github.com/spf13/cast v1.3.0
-	github.com/spf13/jwalterweatherman v1.0.0
-	github.com/spf13/pflag v1.0.3
-	github.com/stretchr/testify v1.4.0
+	github.com/magiconair/properties v1.8.5
+	github.com/mitchellh/mapstructure v1.4.1
+	github.com/pelletier/go-toml v1.9.4
+	github.com/sagikazarmark/crypt v0.1.0
+	github.com/spf13/afero v1.6.0
+	github.com/spf13/cast v1.4.1
+	github.com/spf13/jwalterweatherman v1.1.0
+	github.com/spf13/pflag v1.0.5
+	github.com/stretchr/testify v1.7.0
 	github.com/subosito/gotenv v1.2.0
-	github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5 // indirect
-	gopkg.in/ini.v1 v1.51.0
-	gopkg.in/yaml.v2 v2.3.0
+	gopkg.in/ini.v1 v1.63.1
+	gopkg.in/yaml.v2 v2.4.0
 )
diff --git a/go.sum b/go.sum
index 87a9297..62cdb0b 100644
--- a/go.sum
+++ b/go.sum
@@ -4,127 +4,124 @@ cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSR
 cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
 cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
 cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
-cloud.google.com/go v0.46.3 h1:AVXDdKsrtX33oR9fbCMu/+c1o8Ofjq6Ku/MInaLVg5Y=
 cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
-cloud.google.com/go/bigquery v1.0.1 h1:hL+ycaJpVE9M7nLoiXb/Pn10ENE2u+oddxbD8uu0ZVU=
+cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
+cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
+cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
+cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
+cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
+cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
+cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
+cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
+cloud.google.com/go v0.72.0/go.mod h1:M+5Vjvlc2wnp6tjzE102Dw08nGShTscUx2nZMufOKPI=
+cloud.google.com/go v0.74.0/go.mod h1:VV1xSbzvo+9QJOxLDaJfTjx5e+MePCpCWwvftOeQmWk=
+cloud.google.com/go v0.78.0/go.mod h1:QjdrLG0uq+YwhjoVOLsS1t7TW8fs36kLs4XO5R5ECHg=
+cloud.google.com/go v0.79.0/go.mod h1:3bzgcEeQlzbuEAYu4mrWhKqWjmpprinYgKJLgKHnbb8=
+cloud.google.com/go v0.81.0/go.mod h1:mk/AM35KwGk/Nm2YSeZbxXdrNK3KZOYHmLkOqC2V6E0=
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+gopkg.in/ini.v1 v1.63.1 h1:WlmD2fPTg4maPpRITalGs62TK7VMMtP5E9CHH7aFy6Y=
+gopkg.in/ini.v1 v1.63.1/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
-gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.1-2019.2.3 h1:3JgtbtFHMiCmsznwGVTUWbgGov+pVqnlf1dEJTNAXeM=
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
+honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
-sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
-sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0/go.mod h1:hI742Nqp5OhwiqlzhgfbWU4mW4yO10fP+LoT9WOswdU=
+rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
+rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
diff --git a/internal/encoding/decoder.go b/internal/encoding/decoder.go
new file mode 100644
index 0000000..08b1bb6
--- /dev/null
+++ b/internal/encoding/decoder.go
@@ -0,0 +1,61 @@
+package encoding
+
+import (
+	"sync"
+)
+
+// Decoder decodes the contents of b into a v representation.
+// It's primarily used for decoding contents of a file into a map[string]interface{}.
+type Decoder interface {
+	Decode(b []byte, v interface{}) error
+}
+
+const (
+	// ErrDecoderNotFound is returned when there is no decoder registered for a format.
+	ErrDecoderNotFound = encodingError("decoder not found for this format")
+
+	// ErrDecoderFormatAlreadyRegistered is returned when an decoder is already registered for a format.
+	ErrDecoderFormatAlreadyRegistered = encodingError("decoder already registered for this format")
+)
+
+// DecoderRegistry can choose an appropriate Decoder based on the provided format.
+type DecoderRegistry struct {
+	decoders map[string]Decoder
+
+	mu sync.RWMutex
+}
+
+// NewDecoderRegistry returns a new, initialized DecoderRegistry.
+func NewDecoderRegistry() *DecoderRegistry {
+	return &DecoderRegistry{
+		decoders: make(map[string]Decoder),
+	}
+}
+
+// RegisterDecoder registers a Decoder for a format.
+// Registering a Decoder for an already existing format is not supported.
+func (e *DecoderRegistry) RegisterDecoder(format string, enc Decoder) error {
+	e.mu.Lock()
+	defer e.mu.Unlock()
+
+	if _, ok := e.decoders[format]; ok {
+		return ErrDecoderFormatAlreadyRegistered
+	}
+
+	e.decoders[format] = enc
+
+	return nil
+}
+
+// Decode calls the underlying Decoder based on the format.
+func (e *DecoderRegistry) Decode(format string, b []byte, v interface{}) error {
+	e.mu.RLock()
+	decoder, ok := e.decoders[format]
+	e.mu.RUnlock()
+
+	if !ok {
+		return ErrDecoderNotFound
+	}
+
+	return decoder.Decode(b, v)
+}
diff --git a/internal/encoding/encoder.go b/internal/encoding/encoder.go
new file mode 100644
index 0000000..82c7996
--- /dev/null
+++ b/internal/encoding/encoder.go
@@ -0,0 +1,60 @@
+package encoding
+
+import (
+	"sync"
+)
+
+// Encoder encodes the contents of v into a byte representation.
+// It's primarily used for encoding a map[string]interface{} into a file format.
+type Encoder interface {
+	Encode(v interface{}) ([]byte, error)
+}
+
+const (
+	// ErrEncoderNotFound is returned when there is no encoder registered for a format.
+	ErrEncoderNotFound = encodingError("encoder not found for this format")
+
+	// ErrEncoderFormatAlreadyRegistered is returned when an encoder is already registered for a format.
+	ErrEncoderFormatAlreadyRegistered = encodingError("encoder already registered for this format")
+)
+
+// EncoderRegistry can choose an appropriate Encoder based on the provided format.
+type EncoderRegistry struct {
+	encoders map[string]Encoder
+
+	mu sync.RWMutex
+}
+
+// NewEncoderRegistry returns a new, initialized EncoderRegistry.
+func NewEncoderRegistry() *EncoderRegistry {
+	return &EncoderRegistry{
+		encoders: make(map[string]Encoder),
+	}
+}
+
+// RegisterEncoder registers an Encoder for a format.
+// Registering a Encoder for an already existing format is not supported.
+func (e *EncoderRegistry) RegisterEncoder(format string, enc Encoder) error {
+	e.mu.Lock()
+	defer e.mu.Unlock()
+
+	if _, ok := e.encoders[format]; ok {
+		return ErrEncoderFormatAlreadyRegistered
+	}
+
+	e.encoders[format] = enc
+
+	return nil
+}
+
+func (e *EncoderRegistry) Encode(format string, v interface{}) ([]byte, error) {
+	e.mu.RLock()
+	encoder, ok := e.encoders[format]
+	e.mu.RUnlock()
+
+	if !ok {
+		return nil, ErrEncoderNotFound
+	}
+
+	return encoder.Encode(v)
+}
diff --git a/internal/encoding/error.go b/internal/encoding/error.go
new file mode 100644
index 0000000..e4cde02
--- /dev/null
+++ b/internal/encoding/error.go
@@ -0,0 +1,7 @@
+package encoding
+
+type encodingError string
+
+func (e encodingError) Error() string {
+	return string(e)
+}
diff --git a/internal/encoding/hcl/codec.go b/internal/encoding/hcl/codec.go
new file mode 100644
index 0000000..f3e4ab1
--- /dev/null
+++ b/internal/encoding/hcl/codec.go
@@ -0,0 +1,40 @@
+package hcl
+
+import (
+	"bytes"
+	"encoding/json"
+
+	"github.com/hashicorp/hcl"
+	"github.com/hashicorp/hcl/hcl/printer"
+)
+
+// Codec implements the encoding.Encoder and encoding.Decoder interfaces for HCL encoding.
+// TODO: add printer config to the codec?
+type Codec struct{}
+
+func (Codec) Encode(v interface{}) ([]byte, error) {
+	b, err := json.Marshal(v)
+	if err != nil {
+		return nil, err
+	}
+
+	// TODO: use printer.Format? Is the trailing newline an issue?
+
+	ast, err := hcl.Parse(string(b))
+	if err != nil {
+		return nil, err
+	}
+
+	var buf bytes.Buffer
+
+	err = printer.Fprint(&buf, ast.Node)
+	if err != nil {
+		return nil, err
+	}
+
+	return buf.Bytes(), nil
+}
+
+func (Codec) Decode(b []byte, v interface{}) error {
+	return hcl.Unmarshal(b, v)
+}
diff --git a/internal/encoding/json/codec.go b/internal/encoding/json/codec.go
new file mode 100644
index 0000000..dff9ec9
--- /dev/null
+++ b/internal/encoding/json/codec.go
@@ -0,0 +1,17 @@
+package json
+
+import (
+	"encoding/json"
+)
+
+// Codec implements the encoding.Encoder and encoding.Decoder interfaces for JSON encoding.
+type Codec struct{}
+
+func (Codec) Encode(v interface{}) ([]byte, error) {
+	// TODO: expose prefix and indent in the Codec as setting?
+	return json.MarshalIndent(v, "", "  ")
+}
+
+func (Codec) Decode(b []byte, v interface{}) error {
+	return json.Unmarshal(b, v)
+}
diff --git a/internal/encoding/toml/codec.go b/internal/encoding/toml/codec.go
new file mode 100644
index 0000000..c043802
--- /dev/null
+++ b/internal/encoding/toml/codec.go
@@ -0,0 +1,45 @@
+package toml
+
+import (
+	"github.com/pelletier/go-toml"
+)
+
+// Codec implements the encoding.Encoder and encoding.Decoder interfaces for TOML encoding.
+type Codec struct{}
+
+func (Codec) Encode(v interface{}) ([]byte, error) {
+	if m, ok := v.(map[string]interface{}); ok {
+		t, err := toml.TreeFromMap(m)
+		if err != nil {
+			return nil, err
+		}
+
+		s, err := t.ToTomlString()
+		if err != nil {
+			return nil, err
+		}
+
+		return []byte(s), nil
+	}
+
+	return toml.Marshal(v)
+}
+
+func (Codec) Decode(b []byte, v interface{}) error {
+	tree, err := toml.LoadBytes(b)
+	if err != nil {
+		return err
+	}
+
+	if m, ok := v.(*map[string]interface{}); ok {
+		vmap := *m
+		tmap := tree.ToMap()
+		for k, v := range tmap {
+			vmap[k] = v
+		}
+
+		return nil
+	}
+
+	return tree.Unmarshal(v)
+}
diff --git a/internal/encoding/yaml/codec.go b/internal/encoding/yaml/codec.go
new file mode 100644
index 0000000..f94b269
--- /dev/null
+++ b/internal/encoding/yaml/codec.go
@@ -0,0 +1,14 @@
+package yaml
+
+import "gopkg.in/yaml.v2"
+
+// Codec implements the encoding.Encoder and encoding.Decoder interfaces for YAML encoding.
+type Codec struct{}
+
+func (Codec) Encode(v interface{}) ([]byte, error) {
+	return yaml.Marshal(v)
+}
+
+func (Codec) Decode(b []byte, v interface{}) error {
+	return yaml.Unmarshal(b, v)
+}
diff --git a/remote/remote.go b/remote/remote.go
index ac3ef26..022aab2 100644
--- a/remote/remote.go
+++ b/remote/remote.go
@@ -11,7 +11,7 @@ import (
 	"io"
 	"os"
 
-	crypt "github.com/bketelsen/crypt/config"
+	crypt "github.com/sagikazarmark/crypt/config"
 
 	"github.com/spf13/viper"
 )
diff --git a/viper.go b/viper.go
index a89efe9..d7a3fad 100644
--- a/viper.go
+++ b/viper.go
@@ -22,7 +22,6 @@ package viper
 import (
 	"bytes"
 	"encoding/csv"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
@@ -36,18 +35,20 @@ import (
 	"time"
 
 	"github.com/fsnotify/fsnotify"
-	"github.com/hashicorp/hcl"
-	"github.com/hashicorp/hcl/hcl/printer"
 	"github.com/magiconair/properties"
 	"github.com/mitchellh/mapstructure"
-	"github.com/pelletier/go-toml"
 	"github.com/spf13/afero"
 	"github.com/spf13/cast"
 	jww "github.com/spf13/jwalterweatherman"
 	"github.com/spf13/pflag"
 	"github.com/subosito/gotenv"
 	"gopkg.in/ini.v1"
-	"gopkg.in/yaml.v2"
+
+	"github.com/spf13/viper/internal/encoding"
+	"github.com/spf13/viper/internal/encoding/hcl"
+	"github.com/spf13/viper/internal/encoding/json"
+	"github.com/spf13/viper/internal/encoding/toml"
+	"github.com/spf13/viper/internal/encoding/yaml"
 )
 
 // ConfigMarshalError happens when failing to marshal the configuration.
@@ -67,8 +68,44 @@ type RemoteResponse struct {
 	Error error
 }
 
+var (
+	encoderRegistry = encoding.NewEncoderRegistry()
+	decoderRegistry = encoding.NewDecoderRegistry()
+)
+
 func init() {
 	v = New()
+
+	{
+		codec := yaml.Codec{}
+
+		encoderRegistry.RegisterEncoder("yaml", codec)
+		decoderRegistry.RegisterDecoder("yaml", codec)
+
+		encoderRegistry.RegisterEncoder("yml", codec)
+		decoderRegistry.RegisterDecoder("yml", codec)
+	}
+
+	{
+		codec := json.Codec{}
+
+		encoderRegistry.RegisterEncoder("json", codec)
+		decoderRegistry.RegisterDecoder("json", codec)
+	}
+
+	{
+		codec := toml.Codec{}
+
+		encoderRegistry.RegisterEncoder("toml", codec)
+		decoderRegistry.RegisterDecoder("toml", codec)
+	}
+
+	{
+		codec := hcl.Codec{}
+
+		encoderRegistry.RegisterEncoder("hcl", codec)
+		decoderRegistry.RegisterDecoder("hcl", codec)
+	}
 }
 
 type remoteConfigFactory interface {
@@ -199,6 +236,9 @@ type Viper struct {
 	configPermissions os.FileMode
 	envPrefix         string
 
+	// Specific commands for ini parsing
+	iniLoadOptions ini.LoadOptions
+
 	automaticEnvApplied bool
 	envKeyReplacer      StringReplacer
 	allowEmptyEnv       bool
@@ -1150,7 +1190,7 @@ func (v *Viper) find(lcaseKey string, flagDefault bool) interface{} {
 			return cast.ToInt(flag.ValueString())
 		case "bool":
 			return cast.ToBool(flag.ValueString())
-		case "stringSlice":
+		case "stringSlice", "stringArray":
 			s := strings.TrimPrefix(flag.ValueString(), "[")
 			s = strings.TrimSuffix(s, "]")
 			res, _ := readAsCSV(s)
@@ -1229,7 +1269,7 @@ func (v *Viper) find(lcaseKey string, flagDefault bool) interface{} {
 				return cast.ToInt(flag.ValueString())
 			case "bool":
 				return cast.ToBool(flag.ValueString())
-			case "stringSlice":
+			case "stringSlice", "stringArray":
 				s := strings.TrimPrefix(flag.ValueString(), "[")
 				s = strings.TrimSuffix(s, "]")
 				res, _ := readAsCSV(s)
@@ -1364,11 +1404,13 @@ func (v *Viper) realKey(key string) string {
 func InConfig(key string) bool { return v.InConfig(key) }
 
 func (v *Viper) InConfig(key string) bool {
+	lcaseKey := strings.ToLower(key)
+
 	// if the requested key is an alias, then return the proper key
-	key = v.realKey(key)
+	lcaseKey = v.realKey(lcaseKey)
+	path := strings.Split(lcaseKey, v.keyDelim)
 
-	_, exists := v.config[key]
-	return exists
+	return v.searchIndexableWithPathPrefixes(v.config, path) != nil
 }
 
 // SetDefault sets the default value for this key.
@@ -1581,35 +1623,12 @@ func (v *Viper) unmarshalReader(in io.Reader, c map[string]interface{}) error {
 	buf := new(bytes.Buffer)
 	buf.ReadFrom(in)
 
-	switch strings.ToLower(v.getConfigType()) {
-	case "yaml", "yml":
-		if err := yaml.Unmarshal(buf.Bytes(), &c); err != nil {
-			return ConfigParseError{err}
-		}
-
-	case "json":
-		if err := json.Unmarshal(buf.Bytes(), &c); err != nil {
-			return ConfigParseError{err}
-		}
-
-	case "hcl":
-		obj, err := hcl.Parse(buf.String())
+	switch format := strings.ToLower(v.getConfigType()); format {
+	case "yaml", "yml", "json", "toml", "hcl":
+		err := decoderRegistry.Decode(format, buf.Bytes(), &c)
 		if err != nil {
 			return ConfigParseError{err}
 		}
-		if err = hcl.DecodeObject(&c, obj); err != nil {
-			return ConfigParseError{err}
-		}
-
-	case "toml":
-		tree, err := toml.LoadReader(buf)
-		if err != nil {
-			return ConfigParseError{err}
-		}
-		tmap := tree.ToMap()
-		for k, v := range tmap {
-			c[k] = v
-		}
 
 	case "dotenv", "env":
 		env, err := gotenv.StrictParse(buf)
@@ -1637,7 +1656,7 @@ func (v *Viper) unmarshalReader(in io.Reader, c map[string]interface{}) error {
 		}
 
 	case "ini":
-		cfg := ini.Empty()
+		cfg := ini.Empty(v.iniLoadOptions)
 		err := cfg.Append(buf.Bytes())
 		if err != nil {
 			return ConfigParseError{err}
@@ -1662,26 +1681,13 @@ func (v *Viper) unmarshalReader(in io.Reader, c map[string]interface{}) error {
 func (v *Viper) marshalWriter(f afero.File, configType string) error {
 	c := v.AllSettings()
 	switch configType {
-	case "json":
-		b, err := json.MarshalIndent(c, "", "  ")
-		if err != nil {
-			return ConfigMarshalError{err}
-		}
-		_, err = f.WriteString(string(b))
+	case "yaml", "yml", "json", "toml", "hcl":
+		b, err := encoderRegistry.Encode(configType, c)
 		if err != nil {
 			return ConfigMarshalError{err}
 		}
 
-	case "hcl":
-		b, err := json.Marshal(c)
-		if err != nil {
-			return ConfigMarshalError{err}
-		}
-		ast, err := hcl.Parse(string(b))
-		if err != nil {
-			return ConfigMarshalError{err}
-		}
-		err = printer.Fprint(f, ast.Node)
+		_, err = f.WriteString(string(b))
 		if err != nil {
 			return ConfigMarshalError{err}
 		}
@@ -1714,25 +1720,6 @@ func (v *Viper) marshalWriter(f afero.File, configType string) error {
 			return ConfigMarshalError{err}
 		}
 
-	case "toml":
-		t, err := toml.TreeFromMap(c)
-		if err != nil {
-			return ConfigMarshalError{err}
-		}
-		s := t.String()
-		if _, err := f.WriteString(s); err != nil {
-			return ConfigMarshalError{err}
-		}
-
-	case "yaml", "yml":
-		b, err := yaml.Marshal(c)
-		if err != nil {
-			return ConfigMarshalError{err}
-		}
-		if _, err = f.WriteString(string(b)); err != nil {
-			return ConfigMarshalError{err}
-		}
-
 	case "ini":
 		keys := v.AllKeys()
 		cfg := ini.Empty()
@@ -2081,6 +2068,13 @@ func (v *Viper) SetConfigPermissions(perm os.FileMode) {
 	v.configPermissions = perm.Perm()
 }
 
+// IniLoadOptions sets the load options for ini parsing.
+func IniLoadOptions(in ini.LoadOptions) Option {
+	return optionFunc(func(v *Viper) {
+		v.iniLoadOptions = in
+	})
+}
+
 func (v *Viper) getConfigType() string {
 	if v.configType != "" {
 		return v.configType


Test patch:
diff --git a/internal/encoding/decoder_test.go b/internal/encoding/decoder_test.go
new file mode 100644
index 0000000..80e6688
--- /dev/null
+++ b/internal/encoding/decoder_test.go
@@ -0,0 +1,77 @@
+package encoding
+
+import (
+	"testing"
+)
+
+type decoder struct {
+	v interface{}
+}
+
+func (d decoder) Decode(_ []byte, v interface{}) error {
+	rv := v.(*string)
+	*rv = d.v.(string)
+
+	return nil
+}
+
+func TestDecoderRegistry_RegisterDecoder(t *testing.T) {
+	t.Run("OK", func(t *testing.T) {
+		registry := NewDecoderRegistry()
+
+		err := registry.RegisterDecoder("myformat", decoder{})
+		if err != nil {
+			t.Fatal(err)
+		}
+	})
+
+	t.Run("AlreadyRegistered", func(t *testing.T) {
+		registry := NewDecoderRegistry()
+
+		err := registry.RegisterDecoder("myformat", decoder{})
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		err = registry.RegisterDecoder("myformat", decoder{})
+		if err != ErrDecoderFormatAlreadyRegistered {
+			t.Fatalf("expected ErrDecoderFormatAlreadyRegistered, got: %v", err)
+		}
+	})
+}
+
+func TestDecoderRegistry_Decode(t *testing.T) {
+	t.Run("OK", func(t *testing.T) {
+		registry := NewDecoderRegistry()
+		decoder := decoder{
+			v: "decoded value",
+		}
+
+		err := registry.RegisterDecoder("myformat", decoder)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		var v string
+
+		err = registry.Decode("myformat", []byte("some value"), &v)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		if v != "decoded value" {
+			t.Fatalf("expected 'decoded value', got: %#v", v)
+		}
+	})
+
+	t.Run("DecoderNotFound", func(t *testing.T) {
+		registry := NewDecoderRegistry()
+
+		var v string
+
+		err := registry.Decode("myformat", []byte("some value"), &v)
+		if err != ErrDecoderNotFound {
+			t.Fatalf("expected ErrDecoderNotFound, got: %v", err)
+		}
+	})
+}
diff --git a/internal/encoding/encoder_test.go b/internal/encoding/encoder_test.go
new file mode 100644
index 0000000..e2472ad
--- /dev/null
+++ b/internal/encoding/encoder_test.go
@@ -0,0 +1,70 @@
+package encoding
+
+import (
+	"testing"
+)
+
+type encoder struct {
+	b []byte
+}
+
+func (e encoder) Encode(_ interface{}) ([]byte, error) {
+	return e.b, nil
+}
+
+func TestEncoderRegistry_RegisterEncoder(t *testing.T) {
+	t.Run("OK", func(t *testing.T) {
+		registry := NewEncoderRegistry()
+
+		err := registry.RegisterEncoder("myformat", encoder{})
+		if err != nil {
+			t.Fatal(err)
+		}
+	})
+
+	t.Run("AlreadyRegistered", func(t *testing.T) {
+		registry := NewEncoderRegistry()
+
+		err := registry.RegisterEncoder("myformat", encoder{})
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		err = registry.RegisterEncoder("myformat", encoder{})
+		if err != ErrEncoderFormatAlreadyRegistered {
+			t.Fatalf("expected ErrEncoderFormatAlreadyRegistered, got: %v", err)
+		}
+	})
+}
+
+func TestEncoderRegistry_Decode(t *testing.T) {
+	t.Run("OK", func(t *testing.T) {
+		registry := NewEncoderRegistry()
+		encoder := encoder{
+			b: []byte("encoded value"),
+		}
+
+		err := registry.RegisterEncoder("myformat", encoder)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		b, err := registry.Encode("myformat", "some value")
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		if string(b) != "encoded value" {
+			t.Fatalf("expected 'encoded value', got: %#v", string(b))
+		}
+	})
+
+	t.Run("EncoderNotFound", func(t *testing.T) {
+		registry := NewEncoderRegistry()
+
+		_, err := registry.Encode("myformat", "some value")
+		if err != ErrEncoderNotFound {
+			t.Fatalf("expected ErrEncoderNotFound, got: %v", err)
+		}
+	})
+}
diff --git a/util_test.go b/util_test.go
index a377d5b..941d8a2 100644
--- a/util_test.go
+++ b/util_test.go
@@ -23,16 +23,14 @@ func TestCopyAndInsensitiviseMap(t *testing.T) {
 	var (
 		given = map[string]interface{}{
 			"Foo": 32,
-			"Bar": map[interface{}]interface {
-			}{
+			"Bar": map[interface{}]interface{}{
 				"ABc": "A",
 				"cDE": "B",
 			},
 		}
 		expected = map[string]interface{}{
 			"foo": 32,
-			"bar": map[string]interface {
-			}{
+			"bar": map[string]interface{}{
 				"abc": "A",
 				"cde": "B",
 			},
diff --git a/viper_test.go b/viper_test.go
index a5bbbd4..080d0c4 100644
--- a/viper_test.go
+++ b/viper_test.go
@@ -382,7 +382,9 @@ func TestUnmarshaling(t *testing.T) {
 
 	unmarshalReader(r, v.config)
 	assert.True(t, InConfig("name"))
+	assert.True(t, InConfig("clothing.jacket"))
 	assert.False(t, InConfig("state"))
+	assert.False(t, InConfig("clothing.hat"))
 	assert.Equal(t, "steve", Get("name"))
 	assert.Equal(t, []interface{}{"skateboarding", "snowboarding", "go"}, Get("hobbies"))
 	assert.Equal(t, map[string]interface{}{"jacket": "leather", "trousers": "denim", "pants": map[string]interface{}{"size": "large"}}, Get("clothing"))
@@ -917,6 +919,54 @@ func TestBindPFlagsStringSlice(t *testing.T) {
 	}
 }
 
+// nolint: dupl
+func TestBindPFlagsStringArray(t *testing.T) {
+	tests := []struct {
+		Expected []string
+		Value    string
+	}{
+		{[]string{}, ""},
+		{[]string{"jeden"}, "jeden"},
+		{[]string{"dwa,trzy"}, "dwa,trzy"},
+		{[]string{"cztery,\"piec , szesc\""}, "cztery,\"piec , szesc\""},
+	}
+
+	v := New() // create independent Viper object
+	defaultVal := []string{"default"}
+	v.SetDefault("stringarray", defaultVal)
+
+	for _, testValue := range tests {
+		flagSet := pflag.NewFlagSet("test", pflag.ContinueOnError)
+		flagSet.StringArray("stringarray", testValue.Expected, "test")
+
+		for _, changed := range []bool{true, false} {
+			flagSet.VisitAll(func(f *pflag.Flag) {
+				f.Value.Set(testValue.Value)
+				f.Changed = changed
+			})
+
+			err := v.BindPFlags(flagSet)
+			if err != nil {
+				t.Fatalf("error binding flag set, %v", err)
+			}
+
+			type TestStr struct {
+				StringArray []string
+			}
+			val := &TestStr{}
+			if err := v.Unmarshal(val); err != nil {
+				t.Fatalf("%+#v cannot unmarshal: %s", testValue.Value, err)
+			}
+			if changed {
+				assert.Equal(t, testValue.Expected, val.StringArray)
+				assert.Equal(t, testValue.Expected, v.Get("stringarray"))
+			} else {
+				assert.Equal(t, defaultVal, val.StringArray)
+			}
+		}
+	}
+}
+
 // nolint: dupl
 func TestBindPFlagsIntSlice(t *testing.T) {
 	tests := []struct {
@@ -1191,7 +1241,9 @@ func TestReadBufConfig(t *testing.T) {
 	t.Log(v.AllKeys())
 
 	assert.True(t, v.InConfig("name"))
+	assert.True(t, v.InConfig("clothing.jacket"))
 	assert.False(t, v.InConfig("state"))
+	assert.False(t, v.InConfig("clothing.hat"))
 	assert.Equal(t, "steve", v.Get("name"))
 	assert.Equal(t, []interface{}{"skateboarding", "snowboarding", "go"}, v.Get("hobbies"))
 	assert.Equal(t, map[string]interface{}{"jacket": "leather", "trousers": "denim", "pants": map[string]interface{}{"size": "large"}}, v.Get("clothing"))
@@ -1993,8 +2045,7 @@ func TestCaseInsensitiveSet(t *testing.T) {
 	Reset()
 	m1 := map[string]interface{}{
 		"Foo": 32,
-		"Bar": map[interface{}]interface {
-		}{
+		"Bar": map[interface{}]interface{}{
 			"ABc": "A",
 			"cDE": "B",
 		},
@@ -2002,8 +2053,7 @@ func TestCaseInsensitiveSet(t *testing.T) {
 
 	m2 := map[string]interface{}{
 		"Foo": 52,
-		"Bar": map[interface{}]interface {
-		}{
+		"Bar": map[interface{}]interface{}{
 			"bCd": "A",
 			"eFG": "B",
 		},