* The codepath to call external process filter for smudge/clean
operation learned to show the progress meter.
+ * "git rev-parse" learned "--is-shallow-repository", that is to be
+ used in a way similar to existing "--is-bare-repository" and
+ friends.
+
+ * "git describe --match <pattern>" has been taught to play well with
+ the "--all" option.
+
+ * "git branch" learned "-c/-C" to create a new branch by copying an
+ existing one.
+
+ * Some commands (most notably "git status") makes an opportunistic
+ update when performing a read-only operation to help optimize later
+ operations in the same repository. The new "--no-optional-locks"
+ option can be passed to Git to disable them.
+
Performance, Internal Implementation, Development Support etc.
piece of memory while writing each index entry out. This has been
optimized.
+ * Platforms that ship with a separate sha1 with collision detection
+ library can link to it instead of using the copy we ship as part of
+ our source tree.
+
+ * Code around "notes" have been cleaned up.
+ (merge 3964281524 mh/notes-cleanup later to maint).
+
+ * The long-standing rule that an in-core lockfile instance, once it
+ is used, must not be freed, has been lifted and the lockfile and
+ tempfile APIs have been updated to reduce the chance of programming
+ errors.
+
+ * Our hashmap implementation in hashmap.[ch] is not thread-safe when
+ adding a new item needs to expand the hashtable by rehashing; add
+ an API to disable the automatic rehashing to work it around.
+
+ * Many of our programs consider that it is OK to release dynamic
+ storage that is used throughout the life of the program by simply
+ exiting, but this makes it harder to leak detection tools to avoid
+ reporting false positives. Plug many existing leaks and introduce
+ a mechanism for developers to mark that the region of memory
+ pointed by a pointer is not lost/leaking to help these tools.
+
+ * As "git commit" to conclude a conflicted "git merge" honors the
+ commit-msg hook, "git merge" that records a merge commit that
+ cleanly auto-merges should, but it didn't.
+
+ * The codepath for "git merge-recursive" has been cleaned up.
+
+ * Many leaks of strbuf have been fixed.
+
+ * "git imap-send" has our own implementation of the protocol and also
+ can use more recent libCurl with the imap protocol support. Update
+ the latter so that it can use the credential subsystem, and then
+ make it the default option to use, so that we can eventually
+ deprecate and remove the former.
+
+ * "make style" runs git-clang-format to help developers by pointing
+ out coding style issues.
+
+ * A test to demonstrate "git mv" failing to adjust nested submodules
+ has been added.
+ (merge c514167df2 hv/mv-nested-submodules-test later to maint).
+
+ * On Cygwin, "ulimit -s" does not report failure but it does not work
+ at all, which causes an unexpected success of some tests that
+ expect failures under a limited stack situation. This has been
+ fixed.
+
+ * Many codepaths have been updated to squelch -Wimplicit-fallthrough
+ warnings from Gcc 7 (which is a good code hygiene).
+
+ * Add a helper for DLL loading in anticipation for its need in a
+ future topic RSN.
+
+ * "git status --ignored", when noticing that a directory without any
+ tracked path is ignored, still enumerated all the ignored paths in
+ the directory, which is unnecessary. The codepath has been
+ optimized to avoid this overhead.
+
+ * The final batch to "git rebase -i" updates to move more code from
+ the shell script to C has been merged.
+
+ * Operations that do not touch (majority of) packed refs have been
+ optimized by making accesses to packed-refs file lazy; we no longer
+ pre-parse everything, and an access to a single ref in the
+ packed-refs does not touch majority of irrelevant refs, either.
+
Also contains various documentation updates and code clean-ups.
was in use. This has been fixed.
(merge 31824d180d nd/worktree-kill-parse-ref later to maint).
+ * "git gc" and friends when multiple worktrees are used off of a
+ single repository did not consider the index and per-worktree refs
+ of other worktrees as the root for reachability traversal, making
+ objects that are in use only in other worktrees to be subject to
+ garbage collection.
+
+ * A regression to "gitk --bisect" by a recent update has been fixed.
+ (merge 1d0538e486 mh/packed-ref-store-prep later to maint).
+
+ * "git -c submodule.recurse=yes pull" did not work as if the
+ "--recurse-submodules" option was given from the command line.
+ This has been corrected.
+
+ * Unlike "git commit-tree < file", "git commit-tree -F file" did not
+ pass the contents of the file verbatim and instead completed an
+ incomplete line at the end, if exists. The latter has been updated
+ to match the behaviour of the former.
+ (merge c818e74332 rk/commit-tree-make-F-verbatim later to maint).
+
+ * Many codepaths did not diagnose write failures correctly when disks
+ go full, due to their misuse of write_in_full() helper function,
+ which have been corrected.
+ (merge f48ecd38cb jk/write-in-full-fix later to maint).
+
+ * "git help co" now says "co is aliased to ...", not "git co is".
+ (merge b3a8076e0d ks/help-alias-label later to maint).
+
+ * "git archive", especially when used with pathspec, stored an empty
+ directory in its output, even though Git itself never does so.
+ This has been fixed.
+ (merge 4318094047 rs/archive-excluded-directory later to maint).
+
+ * API error-proofing which happens to also squelch warnings from GCC.
+ (merge c788c54cde tg/refs-allowed-flags later to maint).
+
+ * The explanation of the cut-line in the commit log editor has been
+ slightly tweaked.
+ (merge 8c4b1a3593 ks/commit-do-not-touch-cut-line later to maint).
+
+ * "git gc" tries to avoid running two instances at the same time by
+ reading and writing pid/host from and to a lock file; it used to
+ use an incorrect fscanf() format when reading, which has been
+ corrected.
+ (merge afe2fab72c aw/gc-lockfile-fscanf-fix later to maint).
+
+ * The scripts to drive TravisCI has been reorganized and then an
+ optimization to avoid spending cycles on a branch whose tip is
+ tagged has been implemented.
+ (merge 8376eb4a8f ls/travis-scriptify later to maint).
+
+ * The test linter has been taught that we do not like "echo -e".
+ (merge 1a6d46895d tb/test-lint-echo-e later to maint).
+
+ * Code cmp.std.c nitpick.
+ (merge ac7da78ede mh/for-each-string-list-item-empty-fix later to maint).
+
+ * A regression fix for 2.11 that made the code to read the list of
+ alternate object stores overrun the end of the string.
+ (merge f0f7bebef7 jk/info-alternates-fix later to maint).
+
+ * "git describe --match" learned to take multiple patterns in v2.13
+ series, but the feature ignored the patterns after the first one
+ and did not work at all. This has been fixed.
+ (merge da769d2986 jk/describe-omit-some-refs later to maint).
+
+ * "git filter-branch" cannot reproduce a history with a tag without
+ the tagger field, which only ancient versions of Git allowed to be
+ created. This has been corrected.
+ (merge b2c1ca6b4b ic/fix-filter-branch-to-handle-tag-without-tagger later to maint).
+
+ * "git cat-file --textconv" started segfaulting recently, which
+ has been corrected.
+ (merge cc0ea7c9e5 jk/diff-blob later to maint).
+
+ * The built-in pattern to detect the "function header" for HTML did
+ not match <H1>..<H6> elements without any attributes, which has
+ been fixed.
+ (merge 9c03caca2c ik/userdiff-html-h-element-fix later to maint).
+
+ * "git mailinfo" was loose in decoding quoted printable and produced
+ garbage when the two letters after the equal sign are not
+ hexadecimal. This has been fixed.
+ (merge c8cf423eab rs/mailinfo-qp-decode-fix later to maint).
+
+ * The machinery to create xdelta used in pack files received the
+ sizes of the data in size_t, but lost the higher bits of them by
+ storing them in "unsigned int" during the computation, which is
+ fixed.
+
+ * The delta format used in the packfile cannot reference data at
+ offset larger than what can be expressed in 4-byte, but the
+ generator for the data failed to make sure the offset does not
+ overflow. This has been corrected.
+
+ * The documentation for '-X<option>' for merges was misleadingly
+ written to suggest that "-s theirs" exists, which is not the case.
+ (merge c25d98b2a7 jc/merge-x-theirs-docfix later to maint).
+
+ * "git fast-export" with -M/-C option issued "copy" instruction on a
+ path that is simultaneously modified, which was incorrect.
+ (merge b3e8ca89cf jt/fast-export-copy-modify-fix later to maint).
+
+ * Many codepaths have been updated to squelch -Wsign-compare
+ warnings.
+ (merge 071bcaab64 rj/no-sign-compare later to maint).
+
+ * Memory leaks in various codepaths have been plugged.
+ (merge 4d01a7fa65 ma/leakplugs later to maint).
+
+ * Recent versions of "git rev-parse --parseopt" did not parse the
+ option specification that does not have the optional flags (*=?!)
+ correctly, which has been corrected.
+ (merge a6304fa4c2 bc/rev-parse-parseopt-fix later to maint).
+
* Other minor doc, test and build updates and code cleanups.
(merge f094b89a4d ma/parse-maybe-bool later to maint).
(merge 39b00fa4d4 jk/drop-sha1-entry-pos later to maint).
(merge 6cdf8a7929 ma/ts-cleanups later to maint).
(merge 7560f547e6 ma/up-to-date later to maint).
(merge 0db3dc75f3 rs/apply-epoch later to maint).
+ (merge 74f1bd912b dw/diff-highlight-makefile-fix later to maint).
+ (merge f991761eb8 jk/config-lockfile-leak-fix later to maint).
+ (merge 150efef1e7 ma/pkt-line-leakfix later to maint).
+ (merge 5554451de6 mg/timestamp-t-fix later to maint).
+ (merge 276d0e35c0 ma/split-symref-update-fix later to maint).
+ (merge 3bc4b8f7c7 bb/doc-eol-dirty later to maint).
+ (merge c1bb33c99c jk/system-path-cleanup later to maint).
+ (merge ab46e6fc72 cc/subprocess-handshake-missing-capabilities later to maint).
+ (merge f7a32dd97f kd/doc-for-each-ref later to maint).
+ (merge be94568bc7 ez/doc-duplicated-words-fix later to maint).
+ (merge 01e4be6c3d ks/test-readme-phrasofix later to maint).
+ (merge 217bb56d4f hn/typofix later to maint).
+ (merge c08fd6388c jk/doc-read-tree-table-asciidoctor-fix later to maint).
+ (merge c3342b362e ks/doc-use-camelcase-for-config-name later to maint).
+ (merge 0bca165fdb jk/validate-headref-fix later to maint).
+ (merge 93dbefb389 mr/doc-negative-pathspec later to maint).
+ (merge 5e633326e4 ad/doc-markup-fix later to maint).
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