--- /dev/null
- (merge 8b44deebaf jk/revert-aa-reap-transport-child-processes later to maint).
+Git v2.55 Release Notes
+=======================
+
+UI, Workflows & Features
+------------------------
+
+ * Hook scripts defined via the configuration system can now be
+ configured to run in parallel.
+
+ * The userdiff driver for the Scheme language has been extended to
+ cover other Lisp dialects.
+
+ * Terminal control sequences coming over the sideband while talking
+ to a remote repository are mostly disabled by default, except for
+ ANSI color escape sequences.
+
+ * "ort" merge backend improvements.
+
+ * "git checkout -m another-branch" was invented to deal with local
+ changes to paths that are different between the current and the new
+ branch, but it gave only one chance to resolve conflicts. The command
+ was taught to create a stash to save the local changes.
+
+ * A new builtin "git format-rev" is introduced for pretty formatting
+ one revision expression per line or commit object names found in
+ running text.
+
+ * "git history" learned "fixup" command.
+
+ * The internal URL parsing logic has been made accessible via a new
+ subcommand "git url-parse".
+
+ * Misspelt proxy URL (e.g., httt://...) did not trigger any warning
+ or failure, which has been corrected.
+
+
+Performance, Internal Implementation, Development Support etc.
+--------------------------------------------------------------
+
+ * Promisor remote handling has been refactored and fixed in
+ preparation for auto-configuration of advertised remotes.
+
+ * Rust support is enabled by default (but still allows opting out) in
+ some future version of Git.
+
+ * Preparation of the xdiff/ codebase to work with Rust.
+
+ * Use a larger buffer size in the code paths to ingest pack stream.
+
+ * Refactor service routines in the ref subsystem backends.
+
+ * Shrink wasted memory in Myers diff that does not account for common
+ prefix and suffix removal.
+
+ * Enable expensive tests to catch topics that may cause breakages on
+ integration branches closer to their origin in the contributor PR
+ builds.
+
+
+Fixes since v2.54
+-----------------
+
+ * Code clean-up to use the right instance of a repository instance in
+ calls inside refs subsystem.
+ (merge 57c590feb9 sp/refs-reduce-the-repository later to maint).
+
+ * The check that implements the logic to see if an in-core cache-tree
+ is fully ready to write out a tree object was broken, which has
+ been corrected.
+ (merge 521731213c dl/cache-tree-fully-valid-fix later to maint).
+
+ * The test suite harness and many individual test scripts have been
+ updated to work correctly when 'set -e' is in effect, which helps
+ detect misspelled test commands.
+ (merge ffe8005b9d ps/test-set-e-clean later to maint).
+
+ * Revert a recent change that introduced a regression to help mksh users.
- (merge 4a6ed9d09f js/ci-github-actions-update later to maint).
+
+ * Update various GitHub Actions versions.
- (merge b33bea27a2 js/t5564-socks-use-short-path later to maint).
+
+ * Avoid hitting the pathname limit for socks proxy socket during the
+ test..
- (merge 4bb086cfa2 js/maintenance-fix-deadlock-on-win10 later to maint).
+
+ * To help Windows 10 installations, avoid removing files whose
+ contents are still mmap()'ed.
- (merge 0a6d29090c ps/clang-w-glibc-2.43-and-_Generic later to maint).
+
+ * The 'git backfill' command now rejects revision-limiting options that
+ are incompatible with its operation, uses standard documentation for
+ revision ranges, and includes blobs from boundary commits by default
+ to improve performance of subsequent operations.
+ (merge a1ad4a0fca en/backfill-fixes-and-edges later to maint).
+
+ * "git grep" update.
+ (merge 9ff4b5ab1b rs/grep-column-only-match-fix later to maint).
+
+ * Headers from glibc 2.43 when used with clang does not allow
+ disabling C11 language features, causing build failures..
- (merge 0b72550110 js/mingw-no-nedmalloc later to maint).
+
+ * The 'http.emptyAuth=auto' configuration now correctly attempts
+ Negotiate authentication before falling back to manual credentials.
+ This allows seamless Kerberos ticket-based authentication without
+ requiring users to explicitly set 'http.emptyAuth=true'.
+ (merge 4919938d28 mc/http-emptyauth-negotiate-fix later to maint).
+
+ * Ramifications of turning off commit-graph has been documented a bit
+ more clearly.
+ (merge 48c855bb8f kh/doc-commit-graph later to maint).
+
+ * "git rebase --update-refs", when used with an rebase.instructionFormat
+ with "%d" (describe) in it, tried to update local branch HEAD by
+ mistake, which has been corrected.
+ (merge 106b6885c7 ag/rebase-update-refs-limit-to-branches later to maint).
+
+ * Tweak the way how sideband messages from remote are printed while
+ we talk with a remote repository to avoid tickling terminal
+ emulator glitches.
+ (merge 31e8fcabd8 rs/sideband-clear-line-before-print later to maint).
+
+ * The configuration variable submodule.fetchJobs was not read correctly,
+ which has been corrected.
+ (merge aa45a5902f sj/submodule-update-clone-config-fix later to maint).
+
+ * Update code paths that assumed "unsigned long" was long enough for
+ "size_t".
+ (merge 7a094d68a2 js/objects-larger-than-4gb-on-windows later to maint).
+
+ * Stop using unmaintained custom allocator in Windows build which was
+ the last user of the code.
- (merge 21186cf9bb jh/alias-i18n-fixes later to maint).
+
+ * The computation to shorten the filenames shown in diffstat measured
+ width of individual UTF-8 characters to add up, but forgot to take
+ into account error cases (e.g., an invalid UTF-8 sequence, or a
+ control character).
+ (merge 09d86a3b98 en/diffstat-utf8-truncation-fix later to maint).
+
+ * Some tests assume that bare repository accesses are by default
+ allowed; rewrite some of them to avoid the assumption, rewrite
+ others to explicitly set safe.bareRepository to allow them.
+ (merge 985b38ca6c js/adjust-tests-to-explicitly-access-bare-repo later to maint).
+
+ * Signing commit with custom encoding was passing the data to be
+ signed at a wrong stage in the pipeline, which has been corrected.
+ (merge 7735d7eee3 bc/sign-commit-with-custom-encoding later to maint).
+
+ * Further update to the i18n alias support to avoid regressions.
- (merge 66ae1a48ec jc/t5551-fix-expensive later to maint).
+
+ * "git fetch --deepen=<n>" in a full clone truncated the history to <n>
+ commits deep, which has been corrected to be a no-op instead.
+ (merge 2431f5e0e5 sp/shallow-deepen-on-non-shallow-repo-fix later to maint).
+
+ * Other code cleanup, docfix, build fix, etc.
+ (merge 80f4b802e9 ja/doc-difftool-synopsis-style later to maint).
+ (merge b96490241e jc/doc-timestamps-in-stat later to maint).
+ (merge ef85286e51 ss/t7004-unhide-git-failures later to maint).
+ (merge 7584d10bc2 mf/format-patch-cover-letter-format-docfix later to maint).
+ (merge 8547908eb3 pw/rename-to-get-current-worktree later to maint).
+ (merge 890229b3f3 sg/t6112-unwanted-tilde-expansion-fix later to maint).
+ (merge ab9753e7bc kh/doc-restore-double-underscores-fix later to maint).
+ (merge 4a9e097228 za/t2000-modernise-more later to maint).
+ (merge b635fd0725 kh/doc-log-decorate-list later to maint).