merge(third_party/git): Merge squashed git subtree at v2.23.0 r/373

Merge commit '1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5' as 'third_party/git'

1 files changed, 169 insertions, 0 deletions

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+GIT v1.6.5 Release Notes
+========================
+
+In git 1.7.0, which was planned to be the release after 1.6.5, "git
+push" into a branch that is currently checked out will be refused by
+default.
+
+You can choose what should happen upon such a push by setting the
+configuration variable receive.denyCurrentBranch in the receiving
+repository.
+
+Also, "git push $there :$killed" to delete the branch $killed in a remote
+repository $there, when $killed branch is the current branch pointed at by
+its HEAD, will be refused by default.
+
+You can choose what should happen upon such a push by setting the
+configuration variable receive.denyDeleteCurrent in the receiving
+repository.
+
+To ease the transition plan, the receiving repository of such a
+push running this release will issue a big warning when the
+configuration variable is missing.  Please refer to:
+
+  http://git.or.cz/gitwiki/GitFaq#non-bare
+  http://thread.gmane.org/gmane.comp.version-control.git/107758/focus=108007
+
+for more details on the reason why this change is needed and the
+transition plan.
+
+Updates since v1.6.4
+--------------------
+
+(subsystems)
+
+ * various updates to gitk, git-svn and gitweb.
+
+(portability)
+
+ * more improvements on mingw port.
+
+ * mingw will also give FRSX as the default value for the LESS
+   environment variable when the user does not have one.
+
+ * initial support to compile git on Windows with MSVC.
+
+(performance)
+
+ * On major platforms, the system can be compiled to use with Linus's
+   block-sha1 implementation of the SHA-1 hash algorithm, which
+   outperforms the default fallback implementation we borrowed from
+   Mozilla.
+
+ * Unnecessary inefficiency in deepening of a shallow repository has
+   been removed.
+
+ * "git clone" does not grab objects that it does not need (i.e.
+   referenced only from refs outside refs/heads and refs/tags
+   hierarchy) anymore.
+
+ * The "git" main binary used to link with libcurl, which then dragged
+   in a large number of external libraries.  When using basic plumbing
+   commands in scripts, this unnecessarily slowed things down.  We now
+   implement http/https/ftp transfer as a separate executable as we
+   used to.
+
+ * "git clone" run locally hardlinks or copies the files in .git/ to
+   newly created repository.  It used to give new mtime to copied files,
+   but this delayed garbage collection to trigger unnecessarily in the
+   cloned repository.  We now preserve mtime for these files to avoid
+   this issue.
+
+(usability, bells and whistles)
+
+ * Human writable date format to various options, e.g. --since=yesterday,
+   master@{2000.09.17}, are taught to infer some omitted input properly.
+
+ * A few programs gave verbose "advice" messages to help uninitiated
+   people when issuing error messages.  An infrastructure to allow
+   users to squelch them has been introduced, and a few such messages
+   can be silenced now.
+
+ * refs/replace/ hierarchy is designed to be usable as a replacement
+   of the "grafts" mechanism, with the added advantage that it can be
+   transferred across repositories.
+
+ * "git am" learned to optionally ignore whitespace differences.
+
+ * "git am" handles input e-mail files that has CRLF line endings sensibly.
+
+ * "git am" learned "--scissors" option to allow you to discard early part
+   of an incoming e-mail.
+
+ * "git archive -o output.zip" works without being told what format to
+   use with an explicit "--format=zip".option.
+
+ * "git checkout", "git reset" and "git stash" learned to pick and
+   choose to use selected changes you made, similar to "git add -p".
+
+ * "git clone" learned a "-b" option to pick a HEAD to check out
+   different from the remote's default branch.
+
+ * "git clone" learned --recursive option.
+
+ * "git clone" from a local repository on a different filesystem used to
+   copy individual object files without preserving the old timestamp, giving
+   them extra lifetime in the new repository until they gc'ed.
+
+ * "git commit --dry-run $args" is a new recommended way to ask "what would
+   happen if I try to commit with these arguments."
+
+ * "git commit --dry-run" and "git status" shows conflicted paths in a
+   separate section to make them easier to spot during a merge.
+
+ * "git cvsimport" now supports password-protected pserver access even
+   when the password is not taken from ~/.cvspass file.
+
+ * "git fast-export" learned --no-data option that can be useful when
+   reordering commits and trees without touching the contents of
+   blobs.
+
+ * "git fast-import" has a pair of new front-end in contrib/ area.
+
+ * "git init" learned to mkdir/chdir into a directory when given an
+   extra argument (i.e. "git init this").
+
+ * "git instaweb" optionally can use mongoose as the web server.
+
+ * "git log --decorate" can optionally be told with --decorate=full to
+   give the reference name in full.
+
+ * "git merge" issued an unnecessarily scary message when it detected
+   that the merge may have to touch the path that the user has local
+   uncommitted changes to. The message has been reworded to make it
+   clear that the command aborted, without doing any harm.
+
+ * "git push" can be told to be --quiet.
+
+ * "git push" pays attention to url.$base.pushInsteadOf and uses a URL
+   that is derived from the URL used for fetching.
+
+ * informational output from "git reset" that lists the locally modified
+   paths is made consistent with that of "git checkout $another_branch".
+
+ * "git submodule" learned to give submodule name to scripts run with
+   "foreach" subcommand.
+
+ * various subcommands to "git submodule" learned --recursive option.
+
+ * "git submodule summary" learned --files option to compare the work
+   tree vs the commit bound at submodule path, instead of comparing
+   the index.
+
+ * "git upload-pack", which is the server side support for "git clone" and
+   "git fetch", can call a new post-upload-pack hook for statistics purposes.
+
+(developers)
+
+ * With GIT_TEST_OPTS="--root=/p/a/t/h", tests can be run outside the
+   source directory; using tmpfs may give faster turnaround.
+
+ * With NO_PERL_MAKEMAKER set, DESTDIR= is now honoured, so you can
+   build for one location, and install into another location to tar it
+   up.
+
+Fixes since v1.6.4
+------------------
+
+All of the fixes in v1.6.4.X maintenance series are included in this
+release, unless otherwise noted.