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diff --git a/Documentation/RelNotes/2.50.0.adoc b/Documentation/RelNotes/2.50.0.adoc new file mode 100644 index 0000000000..e85747335b --- /dev/null +++ b/Documentation/RelNotes/2.50.0.adoc @@ -0,0 +1,441 @@ +Git v2.50 Release Notes +======================= + +UI, Workflows & Features +------------------------ + + * A post-processing filter for "diff --raw" output has been + introduced. + + * "git repack" learned "--combine-cruft-below-size" option that + controls how cruft-packs are combined. + + * TCP keepalive behaviour on http transports can now be configured by + calling cURL library. + + * Incrementally updating multi-pack index files. + + * "git reflog" learns "drop" subcommand, that discards the entire + reflog data for a ref. + + * A new userdiff driver for ".ini" format configuration files has + been added. + + * The job to coalesce loose objects into packfiles in "git + maintenance" now has configurable batch size. + + * "git clone" still gave the message about the default branch name; + this message has been turned into an advice message that can be + turned off. + + * "git rev-list" learns machine-parsable output format that delimits + each field with NUL. + + * "git maintenance" learns a new task to expire reflog entries. + + * Auth-related (and unrelated) error handling in send-email has been + made more robust. + + * Updating multiple references have only been possible in an all-or-nothing + fashion with transactions, but it can be more efficient to batch + multiple updates even when some of them are allowed to fail in a + best-effort manner. A new "best effort batches of updates" mode + has been introduced. + + * "git help --build-options" reports SHA-1 and SHA-256 backends used + in the build. + + * "git cat-file --batch" and friends learned to allow "--filter=" to + omit certain objects, just like the transport layer does. + + * "git blame --porcelain" mode now talks about unblamable lines and + lines that are blamed to an ignored commit. + + * The build procedure installs bash (but not zsh) completion script. + + * send-email has been updated to work better with Outlook's SMTP server. + + * "git diff --minimal" used to give non-minimal output when its + optimization kicked in, which has been disabled. + + * "git index-pack --fix-thin" used to abort to prevent a cycle in + delta chains from forming in a corner case even when there is no + such cycle. + + * Make repository clean-up tasks that "gc" can do available to "git + maintenance" front-end. + + * Bundle-URI feature did not use refs recorded in the bundle other + than normal branches as anchoring points to optimize the follow-up + fetch during "git clone"; now it is told to utilize all. + + * The `send-email` documentation has been updated with OAuth2.0 + related examples. + + * Two of the "scalar" subcommands that add a repository that hasn't + been under "scalar"'s control are taught an option not to enable the + scheduled maintenance on it. + + * The userdiff pattern for shell scripts has been updated to cope + with more bash-isms. + + * "git merge-tree" learned an option to see if it resolves cleanly + without actually creating a result. + + * The commit title in the "rebase -i" todo file are now prefixed with + '#', just like a merge commit being replayed. + + * "git receive-pack" optionally learns not to care about connectivity + check, which can be useful when the repository arranges to ensure + connectivity by some other means. + + * "git notes --help" documentation updates. + + +Performance, Internal Implementation, Development Support etc. +-------------------------------------------------------------- + + * A handful of built-in command implementations have been rewritten + to use the repository instance supplied by git.c:run_builtin(), its + caller. + + * "git fsck" becomes more careful when checking the refs. + + * "git fast-export | git fast-import" learns to deal with commit and + tag objects with embedded signatures a bit better. This is highly + experimental and the format of the data stream may change in the + future without compatibility guarantees. + + * The code paths to check whether a refname X is available (by seeing + if another ref X/Y exists, etc.) have been optimized. + + * First step of deprecating and removing merge-recursive. + + * In protocol v2 where the refs advertisement is constrained, we try + to tell the server side not to limit the advertisement when there + is no specific need to, which has been the source of confusion and + recent bugs. Revamp the logic to simplify. + + * Update meson based build procedure for breaking changes support. + + * Enable -Wunreachable-code for developer builds. + + * Ensure what we write in assert() does not have side effects, + and introduce ASSERT() macro to mark those that cannot be + mechanically checked for lack of side effects. + + * Give more meaningful error return values from block writer layer of + the reftable ref-API backend. + + * Make the code in reftable library less reliant on the service + routines it used to borrow from Git proper, to make it easier to + use by external users of the library. + + * CI update. + + * The object layer has been updated to take an explicit repository + instance as a parameter in more code paths. + + * Some warnings from "-Wsign-compare" for builtin/rm.c have been + squelched. + + * A few traditional unit tests have been rewritten to use the clar + framework. + + * Some warnings from "-Wsign-compare" for pathspec.c have been + squelched. + + * "make test" used to have a hard dependency on (basic) Perl; tests + have been rewritten help environment with NO_PERL test the build as + much as possible. + + * Remove remnants of the recursive merge strategy backend, which was + superseded by the ort merge strategy. + + * Optimize the code to dedup references recorded in a bundle file. + + * Update parse-options API to catch mistakes to pass address of an + integral variable of a wrong type/size. + + * Since a call to repo_config() can be called with repo set to NULL + these days, a command that is marked as RUN_SETUP in the builtin + command table does not have to check repo with NULL before making + the call. + + * Overhaul of the reftable API. + + * Reduce requirement for Perl in our documentation build and a few + scripts. + + * The build procedure based on Meson learned to drive the + benchmarking tests. + + * Code clean-up for meson-based build infrastructure. + + * Add an equivalent to "make hdr-check" target to meson based builds. + + * Further code clean-up in the object-store layer. + + * Build performance fix. + + * Teach "git send-email" to also consult `hostname -f` for mail + domain to compute the identity given to SMTP servers. + + * The dependency on the_repository variable has been reduced from the + code paths in "git replay". + + * Support to create a loose object file with unknown object type has + been dropped. + + * The code path to access the "packed-refs" file while "fsck" is + taught to mmap the file, instead of reading the whole file into + memory. + + * Assorted fixes for issues found with CodeQL. + + * Remove the leftover hints to the test framework to mark tests that + do not pass the leak checker tests, as they should no longer be + needed. + + * When a stale .midx file refers to .pack files that no longer exist, + we ended up checking for these non-existent files repeatedly, which + has been optimized by memoizing the non-existence. + + * Build settings have been improved for BSD based systems. + + * Newer version of libcURL detected curl_easy_setopt() calls we made + with platform-natural "int" when we should have used "long", which + all have been corrected. + + * Tests that compare $HOME and $(pwd), which should be the same + directory unless the tests chdir's around, would fail when the user + enters the test directory via symbolic links, which has been + corrected. + + +Fixes since v2.49 +----------------- + + * The refname exclusion logic in the packed-ref backend has been + broken for some time, which confused upload-pack to advertise + different set of refs. This has been corrected. + (merge 10e8a9352b tb/refs-exclude-fixes later to maint). + + * The merge-recursive and merge-ort machinery crashed in corner cases + when certain renames are involved. + (merge 3adba40858 en/merge-process-renames-crash-fix later to maint). + + * Certain "cruft" objects would have never been refreshed when there + are multiple cruft packs in the repository, which has been + corrected. + (merge 08f612ba70 tb/multi-cruft-pack-refresh-fix later to maint). + + * The xdiff code on 32-bit platform misbehaved when an insanely large + context size is given, which has been corrected. + (merge d39e28e68c rs/xdiff-context-length-fix later to maint). + + * GitHub Actions CI switched on a CI/CD variable that does not exist + when choosing what packages to install etc., which has been + corrected. + (merge ee89f7c79d kn/ci-meson-check-build-docs-fix later to maint). + + * Using "git name-rev --stdin" as an example, improve the framework to + prepare tests to pretend to be in the future where the breaking + changes have already happened. + (merge de3dec1187 jc/name-rev-stdin later to maint). + + * An earlier code refactoring of the hash machinery missed a few + required calls to init_fn. + (merge d39f04b638 jh/hash-init-fixes later to maint). + + * A documentation page was left out from formatting and installation, + which has been corrected. + (merge ae85116f18 pw/build-breaking-changes-doc later to maint). + + * The bash command line completion script (in contrib/) has been + updated to cope with remote repository nicknames with slashes in + them. + (merge 778d2f1760 dm/completion-remote-names-fix later to maint). + + * "Dubious ownership" checks on Windows has been tightened up. + (merge 5bb88e89ef js/mingw-admins-are-special later to maint). + + * Layout configuration in vimdiff backend didn't work as advertised, + which has been corrected. + (merge 93bab2d04b fr/vimdiff-layout-fixes later to maint). + + * Fix our use of zlib corner cases. + (merge 1cb2f293f5 jk/zlib-inflate-fixes later to maint). + + * Fix lockfile contention in reftable code on Windows. + (merge 0a3dceabf1 ps/mingw-creat-excl-fix later to maint). + + * "git-merge-file" documentation source, which has lines that look + like conflict markers, lacked custom conflict marker size defined, + which has been corrected.. + (merge d3b5832381 pw/custom-conflict-marker-size-for-merge-related-docs later to maint). + + * Squelch false-positive from sparse. + (merge da87b58014 dd/sparse-glibc-workaround later to maint). + + * Adjust to the deprecation of use of Ubuntu 20.04 GitHub Actions CI. + (merge 832d9f6d0b js/ci-github-update-ubuntu later to maint). + + * Work around CI breakage due to fedora base image getting updated. + (merge 8a471a663b js/ci-fedora-gawk later to maint). + + * A ref transaction corner case fix. + (merge b9fadeead7 jt/ref-transaction-abort-fix later to maint). + + * Random build fixes. + (merge 85e1d6819f ps/misc-build-fixes later to maint). + + * "git fetch [<remote>]" with only the configured fetch refspec + should be the only thing to update refs/remotes/<remote>/HEAD, + but the code was overly eager to do so in other cases. + + * Incorrect sorting of refs with bytes with high-bit set on platforms + with signed char led to a BUG, which has been corrected. + + * "make perf" fixes. + (merge 1665f12fa0 pb/perf-test-fixes later to maint). + + * Doc mark-up updates. + (merge 5a5565ec44 ja/doc-reset-mv-rm-markup-updates later to maint). + + * Work around false positive from CodeQL checker. + (merge 0f558141ed js/range-check-codeql-workaround later to maint). + + * "git log --{left,right}-only A...B", when A and B does not share + any common ancestor, now behaves as expected. + (merge e7ef4be7c2 mh/left-right-limited later to maint). + + * Document the convention to disable hooks altogether by setting the + hooksPath configuration variable to /dev/null. + (merge 1b2eee94f1 ds/doc-disable-hooks later to maint). + + * Make sure outage of third-party sites that supply P4, Git-LFS, and + JGit we use for testing would not prevent our CI jobs from running + at all. + + * Various build tweaks, including CSPRNG selection on some platforms. + (merge cdda67de03 rj/build-tweaks later to maint). + + * Developer support fix.. + (merge 32b74b9809 js/git-perf-env-override later to maint). + + * Fix for scheduled maintenance tasks on platforms using launchctl. + (merge eb2d7beb0e jh/gc-launchctl-schedule-fix later to maint). + + * Update to arm64 Windows port (part of which had been reverted as it + broke builds for existing platforms, which may need to be redone in + future releases). + + * hashmap API clean-up to ensure hashmap_clear() leaves a cleared map + in a reusable state. + (merge 9481877de3 en/hashmap-clear-fix later to maint). + + * "git mv a a/b dst" would ask to move the directory 'a' itself, as + well as its contents, in a single destination directory, which is + a contradicting request that is impossible to satisfy. This case is + now detected and the command errors out. + (merge 974f0d4664 ps/mv-contradiction-fix later to maint). + + * Further refinement on CI messages when an optional external + software is unavailable (e.g. due to third-party service outage). + (merge 956acbefbd jc/ci-skip-unavailable-external-software later to maint). + + * Test result aggregation did not work in Meson based CI jobs. + (merge bd38ed5be1 ps/ci-test-aggreg-fix-for-meson later to maint). + + * Code clean-up around stale CI elements and building with Visual Studio. + (merge a7b060f67f js/ci-buildsystems-cleanup later to maint). + + * "git add 'f?o'" did not add 'foo' if 'f?o', an unusual pathname, + also existed on the working tree, which has been corrected. + (merge ec727e189c kj/glob-path-with-special-char later to maint). + + * The fallback implementation of open_nofollow() depended on + open("symlink", O_NOFOLLOW) to set errno to ELOOP, but a few BSD + derived systems use different errno, which has been worked around. + (merge f47bcc3413 cf/wrapper-bsd-eloop later to maint). + + * Use-after-free fix in the sequencer. + (merge 5dbaec628d pw/sequencer-reflog-use-after-free later to maint). + + * win+Meson CI pipeline, unlike other pipelines for Windows, + used to build artifacts in developer mode, which has been changed to + build them in release mode for consistency. + (merge 184abdcf05 js/ci-build-win-in-release-mode later to maint). + + * CI settings at GitLab has been updated to run MSVC based Meson job + automatically (as opposed to be done only upon manual request). + (merge 6389579b2f ps/ci-gitlab-enable-msvc-meson-job later to maint). + + * "git apply" and "git add -i/-p" code paths no longer unnecessarily + expand sparse-index while working. + (merge ecf9ba20e3 ds/sparse-apply-add-p later to maint). + + * Avoid adding directory path to a sparse-index tree entries to the + name-hash, since they would bloat the hashtable without anybody + querying for them. This was done already for a single threaded + part of the code, but now the multi-threaded code also does the + same. + (merge 2e60aabc75 am/sparse-index-name-hash-fix later to maint). + + * Recent versions of Perl started warning against "! A =~ /pattern/" + which does not negate the result of the matching. As it turns out + that the problematic function is not even called, it was removed. + (merge 67cae845d2 op/cvsserver-perl-warning later to maint). + + * "git apply --index/--cached" when applying a deletion patch in + reverse failed to give the mode bits of the path "removed" by the + patch to the file it creates, which has been corrected. + + * "git verify-refs" errored out in a repository in which + linked worktrees were prepared with Git 2.43 or lower. + (merge d5b3c38b8a sj/ref-contents-check-fix later to maint). + + * Update total_ram() function on BSD variants. + + * Update online_cpus() function on BSD variants. + + * Revert a botched bswap.h change that broke ntohll() functions on + big-endian systems with __builtin_bswap32/64(). + + * Fixes for GitHub Actions Coverity job. + (merge 3cc4fc1ebd js/github-ci-win-coverity-fix later to maint). + + * Other code cleanup, docfix, build fix, etc. + (merge 227c4f33a0 ja/doc-block-delimiter-markup-fix later to maint). + (merge 2bfd3b3685 ab/decorate-code-cleanup later to maint). + (merge 5337daddc7 am/dir-dedup-decl-of-repository later to maint). + (merge 554051d691 en/diff-rename-follow-fix later to maint). + (merge a18c18b470 en/random-cleanups later to maint). + (merge 5af21c9acb hj/doc-rev-list-ancestry-fix later to maint). + (merge 26d76ca284 aj/doc-restore-p-update later to maint). + (merge 2c0dcb9754 cc/lop-remote later to maint). + (merge 7b399322a2 ja/doc-branch-markup later to maint). + (merge ee434e1807 pw/doc-pack-refs-markup-fix later to maint). + (merge c000918eb7 tb/bitamp-typofix later to maint). + (merge fa8cd29676 js/imap-send-peer-cert-verify later to maint). + (merge 98b423bc1c rs/clear-commit-marks-simplify later to maint). + (merge 133d065dd6 ta/bulk-checkin-signed-compare-false-warning-fix later to maint). + (merge d2827dc31e es/meson-build-skip-coccinelle later to maint). + (merge ee8edb7156 dk/vimdiff-doc-fix later to maint). + (merge 107d889303 md/t1403-path-is-file later to maint). + (merge abd4192b07 js/comma-semicolon-confusion later to maint). + (merge 27b7264206 ab/environment-clean-header later to maint). + (merge ff4a749354 as/typofix-in-env-h-header later to maint). + (merge 86eef3541e az/tighten-string-array-constness later to maint). + (merge 25292c301d lo/remove-log-reencode-from-rev-info later to maint). + (merge 1aa50636fd jk/p5332-testfix later to maint). + (merge 42cf4ac552 ps/ci-resurrect-p4-on-github later to maint). + (merge 104add8368 js/diff-codeql-false-positive-workaround later to maint). + (merge f62977b93c en/get-tree-entry-doc later to maint). + (merge e5dd0a05ed ly/am-split-stgit-leakfix later to maint). + (merge bac220e154 rc/t1001-test-path-is-file later to maint). + (merge 91db6c735d ly/reftable-writer-leakfix later to maint). + (merge 20e4e9ad0b jc/doc-synopsis-option-markup later to maint). + (merge cddcee7f64 es/meson-configure-build-options-fix later to maint). + (merge cea9f55f00 wk/sparse-checkout-doc-fix later to maint). |