commit-tree: add and document --no-gpg-sign

Document how to override commit.gpgsign configuration that is set to
true per "git commit" invocation (parse-options machinery lets us
say "--no-gpg-sign" to do so).

"git commit-tree" does not use parse-options, so manually add the
corresponding option for now.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
hashmap.h: make sure map entries are tightly packed

Extending 'struct hashmap_entry' with an int-sized member shouldn't waste
memory on 64-bit systems. This is already documented in api-hashmap.txt,
but needs '__attribute__((__packed__))' to work.

Reduces e.g.

 struct name_entry {
     struct hashmap_entry ent;
     int namelen;
     char *name;
 };

from 32 to 24 bytes.

Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
contrib/git-credential-gnome-keyring.c: small stylistic cleanups

Signed-off-by: John Szakmeister <john@szakmeister.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Reviewed-by: Felipe Contreras <felipe.contreras@gmail.com>
pack-objects doc: treat output filename as opaque

After 1190a1a (pack-objects: name pack files after trailer hash,
2013-12-05), the SHA-1 used to determine the filename is calculated
differently.  Update the documentation to not guarantee anything more
than that the SHA-1 depends on the pack content somehow.

Hopefully this will discourage readers from depending on the old or
the new calculation.

Reported-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff: add test for --no-index executed outside repo

470faf9 diff: move no-index detection to builtin/diff.c breaks the error
message for "git diff --no-index", when the command is executed outside
of a git repository and the wrong number of arguments are given. 6df5762
diff: don't read index when --no-index is given fixes the problem.

Add a test to guard against similar breakages in the future.

Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff: avoid some nesting

Avoid some nesting in builtin/diff.c, to make the code easier to read.
There are no functional changes.

Helped-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Merge branch 'kb/fast-hashmap' (early part) into jch

* 'kb/fast-hashmap' (early part):
  Drop unnecessary #includes from test-hashmap
  Add test-hashmap to .gitignore
  read-cache.c: fix memory leaks caused by removed cache entries
  builtin/update-index.c: cleanup update_one
  fix 'git update-index --verbose --again' output
  remove old hash.[ch] implementation
  name-hash.c: remove cache entries instead of marking them CE_UNHASHED
  name-hash.c: use new hash map implementation for cache entries
  name-hash.c: remove unreferenced directory entries
  name-hash.c: use new hash map implementation for directories
  diffcore-rename.c: use new hash map implementation
  diffcore-rename.c: simplify finding exact renames
  diffcore-rename.c: move code around to prepare for the next patch
  buitin/describe.c: use new hash map implementation
  add a hashtable implementation that supports O(1) removal
  submodule: don't access the .gitmodules cache entry after removing it
Merge branch 'mm/mv-file-to-no-such-dir-with-slash' into jch

* mm/mv-file-to-no-such-dir-with-slash:
  mv: let 'git mv file no-such-dir/' error out
Merge branch 'jl/commit-v-strip-marker' into jch

"git commit -v" appends the patch to the log message before
editing, and then removed the patch when the editor returned
control. However, the patch was not stripped correctly when the
first modified path was a submodule.

* jl/commit-v-strip-marker:
  commit -v: strip diffs and submodule shortlogs from the commit message
Merge branch 'jk/t5000-gzip-simplify' into jch

Test fix.

* jk/t5000-gzip-simplify:
  t5000: simplify gzip prerequisite checks
Merge branch 'nd/gettext-vsnprintf' into jch

* nd/gettext-vsnprintf:
  gettext.c: detect the vsnprintf bug at runtime
Merge branch 'kb/doc-exclude-directory-semantics' into jch

* kb/doc-exclude-directory-semantics:
  gitignore.txt: clarify recursive nature of excluded directories
Merge branch 'jk/name-pack-after-byte-representation' (early part) into jch

* 'jk/name-pack-after-byte-representation' (early part):
  pack-objects: name pack files after trailer hash
  sha1write: make buffer const-correct
Merge branch 'tr/send-email-ssl' into jch

SSL-related options were not passed correctly to underlying socket
layer in "git send-email".

* tr/send-email-ssl:
  send-email: set SSL options through IO::Socket::SSL::set_client_defaults
  send-email: --smtp-ssl-cert-path takes an argument
  send-email: pass Debug to Net::SMTP::SSL::new
Merge branch 'jc/push-refmap' into jch

Make "git push origin master" update the same ref that would be
updated by our 'master' when "git push origin" (no refspecs) is run
while the 'master' branch is checked out, which makes "git push"
more symmetric to "git fetch" and more usable for the triangular
workflow.

* jc/push-refmap:
  push: also use "upstream" mapping when pushing a single ref
  push: use remote.$name.push as a refmap
  builtin/push.c: use strbuf instead of manual allocation
Merge branch 'kn/gitweb-extra-branch-refs' into jch

Allow gitweb to be configured to show refs out of refs/heads/ as if
they were branches.

* kn/gitweb-extra-branch-refs:
  gitweb: Denote non-heads, non-remotes branches
  gitweb: Add a feature for adding more branch refs
  gitweb: Return 1 on validation success instead of passed input
  gitweb: Move check-ref-format code into separate function
Merge branch 'tb/clone-ssh-with-colon-for-port' into jch

Be more careful when parsing remote repository URL given in the
scp-style host:path notation.

* tb/clone-ssh-with-colon-for-port:
  git_connect(): use common return point
  connect.c: refactor url parsing
  git_connect(): refactor the port handling for ssh
  git fetch: support host:/~repo
  t5500: add test cases for diag-url
  git fetch-pack: add --diag-url
  git_connect: factor out discovery of the protocol and its parts
  git_connect: remove artificial limit of a remote command
  t5601: add tests for ssh
  t5601: remove clear_ssh, refactor setup_ssh_wrapper
Merge branch 'cc/starts-n-ends-with' into jch

Remove a few duplicate implementations of prefix/suffix comparison
functions, and rename them to starts_with and ends_with.

* cc/starts-n-ends-with:
  replace {pre,suf}fixcmp() with {starts,ends}_with()
  strbuf: introduce starts_with() and ends_with()
  builtin/remote: remove postfixcmp() and use suffixcmp() instead
  environment: normalize use of prefixcmp() by removing " != 0"

# Conflicts:
# 	builtin/fetch.c
# 	builtin/for-each-ref.c
# 	builtin/remote.c
# 	revision.c
Merge branch 'nd/negative-pathspec' into jch

Introduce "negative pathspec" magic, to allow "git log -- . ':!dir'" to
tell us "I am interested in everything but 'dir' directory".

* nd/negative-pathspec:
  pathspec.c: support adding prefix magic to a pathspec with mnemonic magic
  Support pathspec magic :(exclude) and its short form :!
  glossary-content.txt: rephrase magic signature part
Merge branch 'nd/transport-positive-depth-only' into jch

"git fetch --depth=0" was a no-op, and was silently
ignored. Diagnose it as an error.

* nd/transport-positive-depth-only:
  clone,fetch: catch non positive --depth option value