is used as a short-hand for "--create-reflog" and warns about the
future repurposing of the it when it is used.
+ * The userdiff pattern for .php has been updated.
+
+ * The content-transfer-encoding of the message "git send-email" sends
+ out by default was 8bit, which can cause trouble when there is an
+ overlong line to bust RFC 5322/2822 limit. A new option 'auto' to
+ automatically switch to quoted-printable when there is such a line
+ in the payload has been introduced and is made the default.
+
+ * "git checkout" and "git worktree add" learned to honor
+ checkout.defaultRemote when auto-vivifying a local branch out of a
+ remote tracking branch in a repository with multiple remotes that
+ have tracking branches that share the same names.
+ (merge 8d7b558bae ab/checkout-default-remote later to maint).
+
+ * "git grep" learned the "--only-matching" option.
+
+ * "git rebase --rebase-merges" mode now handles octopus merges as
+ well.
+
+ * Add a server-side knob to skip commits in exponential/fibbonacci
+ stride in an attempt to cover wider swath of history with a smaller
+ number of iterations, potentially accepting a larger packfile
+ transfer, instead of going back one commit a time during common
+ ancestor discovery during the "git fetch" transaction.
+ (merge 42cc7485a2 jt/fetch-negotiator-skipping later to maint).
+
+ * A new configuration variable core.usereplacerefs has been added,
+ primarily to help server installations that want to ignore the
+ replace mechanism altogether.
+
+ * Teach "git tag -s" etc. a few configuration variables (gpg.format
+ that can be set to "openpgp" or "x509", and gpg.<format>.program
+ that is used to specify what program to use to deal with the format)
+ to allow x.509 certs with CMS via "gpgsm" to be used instead of
+ openpgp via "gnupg".
+
+ * Many more strings are prepared for l10n.
+
+ * "git p4 submit" learns to ask its own pre-submit hook if it should
+ continue with submitting.
+
+ * The test performed at the receiving end of "git push" to prevent
+ bad objects from entering repository can be customized via
+ receive.fsck.* configuration variables; we now have gained a
+ counterpart to do the same on the "git fetch" side, with
+ fetch.fsck.* configuration variables.
+
+ * "git pull --rebase=interactive" learned "i" as a short-hand for
+ "interactive".
+
+ * "git instaweb" has been adjusted to run better with newer Apache on
+ RedHat based distros.
+
+ * "git range-diff" is a reimplementation of "git tbdiff" that lets us
+ compare individual patches in two iterations of a topic.
+
+ * The sideband code learned to optionally paint selected keywords at
+ the beginning of incoming lines on the receiving end.
+
+ * "git branch --list" learned to take the default sort order from the
+ 'branch.sort' configuration variable, just like "git tag --list"
+ pays attention to 'tag.sort'.
+
+ * "git worktree" command learned "--quiet" option to make it less
+ verbose.
+
Performance, Internal Implementation, Development Support etc.
* Build and test procedure for netrc credential helper (in contrib/)
has been updated.
- * The conversion to pass "the_repository" and then "a_repository"
- throughout the object access API continues.
-
* Remove unused function definitions and declarations from ewah
bitmap subsystem.
file, even though it shares the same syntax with configuration
files, to read random configuration items from it.
+ * "git fast-import" has been updated to avoid attempting to create
+ delta against a zero-byte-long string, which is pointless.
+
+ * The codebase has been updated to compile cleanly with -pedantic
+ option.
+ (merge 2b647a05d7 bb/pedantic later to maint).
+
+ * The character display width table has been updated to match the
+ latest Unicode standard.
+ (merge 570951eea2 bb/unicode-11-width later to maint).
+
+ * test-lint now looks for broken use of "VAR=VAL shell_func" in test
+ scripts.
+
+ * Conversion from uchar[40] to struct object_id continues.
+
+ * Recent "security fix" to pay attention to contents of ".gitmodules"
+ while accepting "git push" was a bit overly strict than necessary,
+ which has been adjusted.
+
+ * "git fsck" learns to make sure the optional commit-graph file is in
+ a sane state.
+
+ * "git diff --color-moved" feature has further been tweaked.
+
+ * Code restructuring and a small fix to transport protocol v2 during
+ fetching.
+
+ * Parsing of -L[<N>][,[<M>]] parameters "git blame" and "git log"
+ take has been tweaked.
+
+ * lookup_commit_reference() and friends have been updated to find
+ in-core object for a specific in-core repository instance.
+
+ * Various glitches in the heuristics of merge-recursive strategy have
+ been documented in new tests.
+
+ * "git fetch" learned a new option "--negotiation-tip" to limit the
+ set of commits it tells the other end as "have", to reduce wasted
+ bandwidth and cycles, which would be helpful when the receiving
+ repository has a lot of refs that have little to do with the
+ history at the remote it is fetching from.
+
+ * For a large tree, the index needs to hold many cache entries
+ allocated on heap. These cache entries are now allocated out of a
+ dedicated memory pool to amortize malloc(3) overhead.
+
+ * Tests to cover various conflicting cases have been added for
+ merge-recursive.
+
+ * Tests to cover conflict cases that involve submodules have been
+ added for merge-recursive.
+
+ * Look for broken "&&" chains that are hidden in subshell, many of
+ which have been found and corrected.
+
+ * The singleton commit-graph in-core instance is made per in-core
+ repository instance.
+
+ * "make DEVELOPER=1 DEVOPTS=pedantic" allows developers to compile
+ with -pedantic option, which may catch more problematic program
+ constructs and potential bugs.
+
+ * Preparatory code to later add json output for telemetry data has
+ been added.
+
+ * Update the way we use Coccinelle to find out-of-style code that
+ need to be modernised.
+
+ * It is too easy to misuse system API functions such as strcat();
+ these selected functions are now forbidden in this codebase and
+ will cause a compilation failure.
+
+ * Add a script (in contrib/) to help users of VSCode work better with
+ our codebase.
+
+ * The Travis CI scripts were taught to ship back the test data from
+ failed tests.
+ (merge aea8879a6a sg/travis-retrieve-trash-upon-failure later to maint).
+
+ * The parse-options machinery learned to refrain from enclosing
+ placeholder string inside a "<bra" and "ket>" pair automatically
+ without PARSE_OPT_LITERAL_ARGHELP. Existing help text for option
+ arguments that are not formatted correctly have been identified and
+ fixed.
+ (merge 5f0df44cd7 rs/parse-opt-lithelp later to maint).
+
+ * Noiseword "extern" has been removed from function decls in the
+ header files.
+
+ * A few atoms like %(objecttype) and %(objectsize) in the format
+ specifier of "for-each-ref --format=<format>" can be filled without
+ getting the full contents of the object, but just with the object
+ header. These cases have been optimized by calling
+ oid_object_info() API (instead of reading and inspecting the data).
+
+ * The end result of documentation update has been made to be
+ inspected more easily to help developers.
+
+ * The API to iterate over all objects learned to optionally list
+ objects in the order they appear in packfiles, which helps locality
+ of access if the caller accesses these objects while as objects are
+ enumerated.
+
+ * Improve built-in facility to catch broken &&-chain in the tests.
+
+ * The more library-ish parts of the codebase learned to work on the
+ in-core index-state instance that is passed in by their callers,
+ instead of always working on the singleton "the_index" instance.
+
+ * A test prerequisite defined by various test scripts with slightly
+ different semantics has been consolidated into a single copy and
+ made into a lazily defined one.
+ (merge 6ec633059a wc/make-funnynames-shared-lazy-prereq later to maint).
+
+ * After a partial clone, repeated fetches from promisor remote would
+ have accumulated many packfiles marked with .promisor bit without
+ getting them coalesced into fewer packfiles, hurting performance.
+ "git repack" now learned to repack them.
+
+ * Partially revert the support for multiple hash functions to regain
+ hash comparison performance; we'd think of a way to do this better
+ in the next cycle.
+
+ * "git help --config" (which is used in command line completion)
+ missed the configuration variables not described in the main
+ config.txt file but are described in another file that is included
+ by it, which has been corrected.
+
+ * The test linter code has learned that the end of here-doc mark
+ "EOF" can be quoted in a double-quote pair, not just in a
+ single-quote pair.
+
Fixes since v2.18
-----------------
to the submodule was changed in the range of commits in the
superproject, sometimes showing "(null)". This has been corrected.
- * "git submodule" did not correctly adjust core.worktree setting that
- indicates whether/where a submodule repository has its associated
- working tree across various state transitions, which has been
- corrected.
- (merge 984cd77ddb sb/submodule-core-worktree later to maint).
-
* Bugfix for "rebase -i" corner case regression.
(merge a9279c6785 pw/rebase-i-keep-reword-after-conflict later to maint).
not turn a case-incapable filesystem into a case-capable one.
(merge 48294b512a ms/core-icase-doc later to maint).
+ * "fsck.skipList" did not prevent a blob object listed there from
+ being inspected for is contents (e.g. we recently started to
+ inspect the contents of ".gitmodules" for certain malicious
+ patterns), which has been corrected.
+ (merge fb16287719 rj/submodule-fsck-skip later to maint).
+
+ * "git checkout --recurse-submodules another-branch" did not report
+ in which submodule it failed to update the working tree, which
+ resulted in an unhelpful error message.
+ (merge ba95d4e4bd sb/submodule-move-head-error-msg later to maint).
+
+ * "git rebase" behaved slightly differently depending on which one of
+ the three backends gets used; this has been documented and an
+ effort to make them more uniform has begun.
+ (merge b00bf1c9a8 en/rebase-consistency later to maint).
+
+ * The "--ignore-case" option of "git for-each-ref" (and its friends)
+ did not work correctly, which has been fixed.
+ (merge e674eb2528 jk/for-each-ref-icase later to maint).
+
+ * "git fetch" failed to correctly validate the set of objects it
+ received when making a shallow history deeper, which has been
+ corrected.
+ (merge cf1e7c0770 jt/connectivity-check-after-unshallow later to maint).
+
+ * Partial clone support of "git clone" has been updated to correctly
+ validate the objects it receives from the other side. The server
+ side has been corrected to send objects that are directly
+ requested, even if they may match the filtering criteria (e.g. when
+ doing a "lazy blob" partial clone).
+ (merge a7e67c11b8 jt/partial-clone-fsck-connectivity later to maint).
+
+ * Handling of an empty range by "git cherry-pick" was inconsistent
+ depending on how the range ended up to be empty, which has been
+ corrected.
+ (merge c5e358d073 jk/empty-pick-fix later to maint).
+
+ * "git reset --merge" (hence "git merge ---abort") and "git reset --hard"
+ had trouble working correctly in a sparsely checked out working
+ tree after a conflict, which has been corrected.
+ (merge b33fdfc34c mk/merge-in-sparse-checkout later to maint).
+
+ * Correct a broken use of "VAR=VAL shell_func" in a test.
+ (merge 650161a277 jc/t3404-one-shot-export-fix later to maint).
+
+ * "git rev-parse ':/substring'" did not consider the history leading
+ only to HEAD when looking for a commit with the given substring,
+ when the HEAD is detached. This has been fixed.
+ (merge 6b3351e799 wc/find-commit-with-pattern-on-detached-head later to maint).
+
+ * Build doc update for Windows.
+ (merge ede8d89bb1 nd/command-list later to maint).
+
+ * core.commentchar is now honored when preparing the list of commits
+ to replay in "rebase -i".
+
+ * "git pull --rebase" on a corrupt HEAD caused a segfault. In
+ general we substitute an empty tree object when running the in-core
+ equivalent of the diff-index command, and the codepath has been
+ corrected to do so as well to fix this issue.
+ (merge 3506dc9445 jk/has-uncommitted-changes-fix later to maint).
+
+ * httpd tests saw occasional breakage due to the way its access log
+ gets inspected by the tests, which has been updated to make them
+ less flaky.
+ (merge e8b3b2e275 sg/httpd-test-unflake later to maint).
+
+ * Tests to cover more D/F conflict cases have been added for
+ merge-recursive.
+
+ * "git gc --auto" opens file descriptors for the packfiles before
+ spawning "git repack/prune", which would upset Windows that does
+ not want a process to work on a file that is open by another
+ process. The issue has been worked around.
+ (merge 12e73a3ce4 kg/gc-auto-windows-workaround later to maint).
+
+ * The recursive merge strategy did not properly ensure there was no
+ change between HEAD and the index before performing its operation,
+ which has been corrected.
+ (merge 55f39cf755 en/dirty-merge-fixes later to maint).
+
+ * "git rebase" started exporting GIT_DIR environment variable and
+ exposing it to hook scripts when part of it got rewritten in C.
+ Instead of matching the old scripted Porcelains' behaviour,
+ compensate by also exporting GIT_WORK_TREE environment as well to
+ lessen the damage. This can harm existing hooks that want to
+ operate on different repository, but the current behaviour is
+ already broken for them anyway.
+ (merge ab5e67d751 bc/sequencer-export-work-tree-as-well later to maint).
+
+ * "git send-email" when using in a batched mode that limits the
+ number of messages sent in a single SMTP session lost the contents
+ of the variable used to choose between tls/ssl, unable to send the
+ second and later batches, which has been fixed.
+ (merge 636f3d7ac5 jm/send-email-tls-auth-on-batch later to maint).
+
+ * The lazy clone support had a few places where missing but promised
+ objects were not correctly tolerated, which have been fixed.
+
+ * One of the "diff --color-moved" mode "dimmed_zebra" that was named
+ in an unusual way has been deprecated and replaced by
+ "dimmed-zebra".
+ (merge e3f2f5f9cd es/diff-color-moved-fix later to maint).
+
+ * The wire-protocol v2 relies on the client to send "ref prefixes" to
+ limit the bandwidth spent on the initial ref advertisement. "git
+ clone" when learned to speak v2 forgot to do so, which has been
+ corrected.
+ (merge 402c47d939 bw/clone-ref-prefixes later to maint).
+
+ * "git diff --histogram" had a bad memory usage pattern, which has
+ been rearranged to reduce the peak usage.
+ (merge 79cb2ebb92 sb/histogram-less-memory later to maint).
+
+ * Code clean-up to use size_t/ssize_t when they are the right type.
+ (merge 7726d360b5 jk/size-t later to maint).
+
+ * The wire-protocol v2 relies on the client to send "ref prefixes" to
+ limit the bandwidth spent on the initial ref advertisement. "git
+ fetch $remote branch:branch" that asks tags that point into the
+ history leading to the "branch" automatically followed sent to
+ narrow prefix and broke the tag following, which has been fixed.
+ (merge 2b554353a5 jt/tag-following-with-proto-v2-fix later to maint).
+
+ * When the sparse checkout feature is in use, "git cherry-pick" and
+ other mergy operations lost the skip_worktree bit when a path that
+ is excluded from checkout requires content level merge, which is
+ resolved as the same as the HEAD version, without materializing the
+ merge result in the working tree, which made the path appear as
+ deleted. This has been corrected by preserving the skip_worktree
+ bit (and not materializing the file in the working tree).
+ (merge 2b75fb601c en/merge-recursive-skip-fix later to maint).
+
+ * The "author-script" file "git rebase -i" creates got broken when
+ we started to move the command away from shell script, which is
+ getting fixed now.
+ (merge 5522bbac20 es/rebase-i-author-script-fix later to maint).
+
+ * The automatic tree-matching in "git merge -s subtree" was broken 5
+ years ago and nobody has noticed since then, which is now fixed.
+ (merge 2ec4150713 jk/merge-subtree-heuristics later to maint).
+
+ * "git fetch $there refs/heads/s" ought to fetch the tip of the
+ branch 's', but when "refs/heads/refs/heads/s", i.e. a branch whose
+ name is "refs/heads/s" exists at the same time, fetched that one
+ instead by mistake. This has been corrected to honor the usual
+ disambiguation rules for abbreviated refnames.
+ (merge 60650a48c0 jt/refspec-dwim-precedence-fix later to maint).
+
+ * Futureproofing a helper function that can easily be misused.
+ (merge 65bb21e77e es/want-color-fd-defensive later to maint).
+
+ * The http-backend (used for smart-http transport) used to slurp the
+ whole input until EOF, without paying attention to CONTENT_LENGTH
+ that is supplied in the environment and instead expecting the Web
+ server to close the input stream. This has been fixed.
+ (merge eebfe40962 mk/http-backend-content-length later to maint).
+
+ * "git merge --abort" etc. did not clean things up properly when
+ there were conflicted entries in the index in certain order that
+ are involved in D/F conflicts. This has been corrected.
+ (merge ad3762042a en/abort-df-conflict-fixes later to maint).
+
+ * "git diff --indent-heuristic" had a bad corner case performance.
+ (merge 301ef85401 sb/indent-heuristic-optim later to maint).
+
+ * The "--exec" option to "git rebase --rebase-merges" placed the exec
+ commands at wrong places, which has been corrected.
+
+ * "git verify-tag" and "git verify-commit" have been taught to use
+ the exit status of underlying "gpg --verify" to signal bad or
+ untrusted signature they found.
+ (merge 4e5dc9ca17 jc/gpg-status later to maint).
+
+ * "git mergetool" stopped and gave an extra prompt to continue after
+ the last path has been handled, which did not make much sense.
+ (merge d651a54b8a ng/mergetool-lose-final-prompt later to maint).
+
+ * Among the three codepaths we use O_APPEND to open a file for
+ appending, one used for writing GIT_TRACE output requires O_APPEND
+ implementation that behaves sensibly when multiple processes are
+ writing to the same file. POSIX emulation used in the Windows port
+ has been updated to improve in this area.
+ (merge d641097589 js/mingw-o-append later to maint).
+
+ * "git pull --rebase -v" in a repository with a submodule barfed as
+ an intermediate process did not understand what "-v(erbose)" flag
+ meant, which has been fixed.
+ (merge e84c3cf3dc sb/pull-rebase-submodule later to maint).
+
+ * Recent update to "git config" broke updating variable in a
+ subsection, which has been corrected.
+ (merge bff7df7a87 sb/config-write-fix later to maint).
+
+ * When "git rebase -i" is told to squash two or more commits into
+ one, it labeled the log message for each commit with its number.
+ It correctly called the first one "1st commit", but the next one
+ was "commit #1", which was off-by-one. This has been corrected.
+ (merge dd2e36ebac pw/rebase-i-squash-number-fix later to maint).
+
+ * "git rebase -i", when a 'merge <branch>' insn in its todo list
+ fails, segfaulted, which has been (minimally) corrected.
+ (merge bc9238bb09 pw/rebase-i-merge-segv-fix later to maint).
+
+ * "git cherry-pick --quit" failed to remove CHERRY_PICK_HEAD even
+ though we won't be in a cherry-pick session after it returns, which
+ has been corrected.
+ (merge 3e7dd99208 nd/cherry-pick-quit-fix later to maint).
+
+ * In a recent update in 2.18 era, "git pack-objects" started
+ producing a larger than necessary packfiles by missing
+ opportunities to use large deltas. This has been corrected.
+
+ * The meaning of the possible values the "core.checkStat"
+ configuration variable can take were not adequately documented,
+ which has been fixed.
+ (merge 9bf5d4c4e2 nd/config-core-checkstat-doc later to maint).
+
+ * Recent "git rebase -i" update started to write bogusly formatted
+ author-script, with a matching broken reading code. These are
+ fixed.
+
+ * Recent addition of "directory rename" heuristics to the
+ merge-recursive backend makes the command susceptible to false
+ positives and false negatives. In the context of "git am -3",
+ which does not know about surrounding unmodified paths and thus
+ cannot inform the merge machinery about the full trees involved,
+ this risk is particularly severe. As such, the heuristic is
+ disabled for "git am -3" to keep the machinery "more stupid but
+ predictable".
+
+ * "git merge-base" in 2.19-rc1 has performance regression when the
+ (experimental) commit-graph feature is in use, which has been
+ mitigated.
+
* Code cleanup, docfix, build fix, etc.
(merge aee9be2ebe sg/update-ref-stdin-cleanup later to maint).
(merge 037714252f jc/clean-after-sanity-tests later to maint).
(merge 51d1863168 tz/exclude-doc-smallfixes later to maint).
(merge a9aa3c0927 ds/commit-graph later to maint).
(merge 5cf8e06474 js/enhanced-version-info later to maint).
+ (merge 6aaded5509 tb/config-default later to maint).
+ (merge 022d2ac1f3 sb/blame-color later to maint).
+ (merge 5a06a20e0c bp/test-drop-caches-for-windows later to maint).
+ (merge dd61cc1c2e jk/ui-color-always-to-auto later to maint).
+ (merge 1e83b9bfdd sb/trailers-docfix later to maint).
+ (merge ab29f1b329 sg/fast-import-dump-refs-on-checkpoint-fix later to maint).
+ (merge 6a8ad880f0 jn/subtree-test-fixes later to maint).
+ (merge ffbd51cc60 nd/pack-objects-threading-doc later to maint).
+ (merge e9dac7be60 es/mw-to-git-chain-fix later to maint).
+ (merge fe583c6c7a rs/remote-mv-leakfix later to maint).
+ (merge 69885ab015 en/t3031-title-fix later to maint).
+ (merge 8578037bed nd/config-blame-sort later to maint).
+ (merge 8ad169c4ba hn/config-in-code-comment later to maint).
+ (merge b7446fcfdf ar/t4150-am-scissors-test-fix later to maint).
+ (merge a8132410ee js/typofixes later to maint).
+ (merge 388d0ff6e5 en/update-index-doc later to maint).
+ (merge e05aa688dd jc/update-index-doc later to maint).
+ (merge 10c600172c sg/t5310-empty-input-fix later to maint).
+ (merge 5641eb9465 jh/partial-clone-doc later to maint).
+ (merge 2711b1ad5e ab/submodule-relative-url-tests later to maint).
+ (merge ce528de023 ab/unconditional-free-and-null later to maint).
+ (merge bbc072f5d8 rs/opt-updates later to maint).
+ (merge 69d846f053 jk/use-compat-util-in-test-tool later to maint).
+ (merge 1820703045 js/larger-timestamps later to maint).
+ (merge c8b35b95e1 sg/t4051-fix later to maint).
+ (merge 30612cb670 sg/t0020-conversion-fix later to maint).
+ (merge 15da753709 sg/t7501-thinkofix later to maint).
+ (merge 79b04f9b60 sg/t3903-missing-fix later to maint).
+ (merge 2745817028 sg/t3420-autostash-fix later to maint).
+ (merge 7afb0d6777 sg/test-rebase-editor-fix later to maint).
+ (merge 6c6ce21baa es/freebsd-iconv-portability later to maint).