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diff --git a/Documentation/RelNotes/2.34.0.txt b/Documentation/RelNotes/2.34.0.txt new file mode 100644 index 0000000000..75d4fdfde7 --- /dev/null +++ b/Documentation/RelNotes/2.34.0.txt @@ -0,0 +1,438 @@ +Git 2.34 Release Notes +====================== + +Updates since Git 2.33 +---------------------- + +Backward compatibility notes + + * The "--preserve-merges" option of "git rebase" has been removed. + + +UI, Workflows & Features + + * Pathname expansion (like "~username/") learned a way to specify a + location relative to Git installation (e.g. its $sharedir which is + $(prefix)/share), with "%(prefix)". + + * The `ort` strategy is used instead of `recursive` as the default + merge strategy. + + * The userdiff pattern for "java" language has been updated. + + * "git rebase" by default skips changes that are equivalent to + commits that are already in the history the branch is rebased onto; + give messages when this happens to let the users be aware of + skipped commits, and also teach them how to tell "rebase" to keep + duplicated changes. + + * The advice message that "git cherry-pick" gives when it asks + conflicted replay of a commit to be resolved by the end user has + been updated. + + * After "git clone --recurse-submodules", all submodules are cloned + but they are not by default recursed into by other commands. With + submodule.stickyRecursiveClone configuration set, submodule.recurse + configuration is set to true in a repository created by "clone" + with "--recurse-submodules" option. + + * The logic for auto-correction of misspelt subcommands learned to go + interactive when the help.autocorrect configuration variable is set + to 'prompt'. + + * "git maintenance" scheduler learned to use systemd timers as a + possible backend. + + * "git diff --submodule=diff" showed failure from run_command() when + trying to run diff inside a submodule, when the user manually + removes the submodule directory. + + * "git bundle unbundle" learned to show progress display. + + * In cone mode, the sparse-index code path learned to remove ignored + files (like build artifacts) outside the sparse cone, allowing the + entire directory outside the sparse cone to be removed, which is + especially useful when the sparse patterns change. + + * Taking advantage of the CGI interface, http-backend has been + updated to enable protocol v2 automatically when the other side + asks for it. + + * The credential-cache helper has been adjusted to Windows. + + * The error in "git help no-such-git-command" is handled better. + + * The unicode character width table (used for output alignment) has + been updated. + + * The ref iteration code used to optionally allow dangling refs to be + shown, which has been tightened up. + + * "git add", "git mv", and "git rm" have been adjusted to avoid + updating paths outside of the sparse-checkout definition unless + the user specifies a "--sparse" option. + + * "git repack" has been taught to generate multi-pack reachability + bitmaps. + + * "git fsck" has been taught to report mismatch between expected and + actual types of an object better. + + * In addition to GnuPG, ssh public crypto can be used for object and + push-cert signing. Note that this feature cannot be used with + ssh-keygen from OpenSSH 8.7, whose support for it is broken. Avoid + using it unless you update to OpenSSH 8.8. + + * "git log --grep=string --author=name" learns to highlight hits just + like "git grep string" does. + + + +Performance, Internal Implementation, Development Support etc. + + * "git bisect" spawned "git show-branch" only to pretty-print the + title of the commit after checking out the next version to be + tested; this has been rewritten in C. + + * "git add" can work better with the sparse index. + + * Support for ancient versions of cURL library (pre 7.19.4) has been + dropped. + + * A handful of tests that assumed implementation details of files + backend for refs have been cleaned up. + + * trace2 logs learned to show parent process name to see in what + context Git was invoked. + + * Loading of ref tips to prepare for common ancestry negotiation in + "git fetch-pack" has been optimized by taking advantage of the + commit graph when available. + + * Remind developers that the userdiff patterns should be kept simple + and permissive, assuming that the contents they apply are always + syntactically correct. + + * The current implementation of GIT_TEST_FAIL_PREREQS is broken in + that checking for the lack of a prerequisite would not work. Avoid + the use of "if ! test_have_prereq X" in a test script. + + * The revision traversal API has been optimized by taking advantage + of the commit-graph, when available, to determine if a commit is + reachable from any of the existing refs. + + * "git fetch --quiet" optimization to avoid useless computation of + info that will never be displayed. + + * Callers from older advice_config[] based API has been updated to + use the newer advice_if_enabled() and advice_enabled() API. + + * Teach "test_pause" and "debug" helpers to allow using the HOME and + TERM environment variables the user usually uses. + + * "make INSTALL_STRIP=-s install" allows the installation step to use + "install -s" to strip the binaries as they get installed. + + * Code that handles large number of refs in the "git fetch" code + path has been optimized. + + * The reachability bitmap file used to be generated only for a single + pack, but now we've learned to generate bitmaps for history that + span across multiple packfiles. + + * The code to make "git grep" recurse into submodules has been + updated to migrate away from the "add submodule's object store as + an alternate object store" mechanism (which is suboptimal). + + * The tracing of process ancestry information has been enhanced. + + * Reduce number of write(2) system calls while sending the + ref advertisement. + + * Update the build procedure to use the "-pedantic" build when + DEVELOPER makefile macro is in effect. + + * Large part of "git submodule add" gets rewritten in C. + + * The run-command API has been updated so that the callers can easily + ask the file descriptors open for packfiles to be closed immediately + before spawning commands that may trigger auto-gc. + + * An oddball OPTION_ARGUMENT feature has been removed from the + parse-options API. + + * The mergesort implementation used to sort linked list has been + optimized. + + * Remove external declaration of functions that no longer exist. + + * "git multi-pack-index write --bitmap" learns to propagate the + hashcache from original bitmap to resulting bitmap. + + * CI learns to run the leak sanitizer builds. + + * "git grep --recurse-submodules" takes trees and blobs from the + submodule repository, but the textconv settings when processing a + blob from the submodule is not taken from the submodule repository. + A test is added to demonstrate the issue, without fixing it. + + * Teach "git help -c" into helping the command line completion of + configuration variables. + + * When "git cmd -h" shows more than one line of usage text (e.g. + the cmd subcommand may take sub-sub-command), parse-options API + learned to align these lines, even across i18n/l10n. + + * Prevent "make sparse" from running for the source files that + haven't been modified. + + * The code path to write a new version of .midx multi-pack index files + has learned to release the mmaped memory holding the current + version of .midx before removing them from the disk, as some + platforms do not allow removal of a file that still has mapping. + + * A new feature has been added to abort early in the test framework. + + +Fixes since v2.33 +----------------- + + * Input validation of "git pack-objects --stdin-packs" has been + corrected. + + * Bugfix for common ancestor negotiation recently introduced in "git + push" code path. + + * "git pull" had various corner cases that were not well thought out + around its --rebase backend, e.g. "git pull --ff-only" did not stop + but went ahead and rebased when the history on other side is not a + descendant of our history. The series tries to fix them up. + + * "git apply" miscounted the bytes and failed to read to the end of + binary hunks. + + * "git range-diff" code clean-up. + + * "git commit --fixup" now works with "--edit" again, after it was + broken in v2.32. + + * Use upload-artifacts v1 (instead of v2) for 32-bit linux, as the + new version has a blocker bug for that architecture. + + * Checking out all the paths from HEAD during the last conflicted + step in "git rebase" and continuing would cause the step to be + skipped (which is expected), but leaves MERGE_MSG file behind in + $GIT_DIR and confuses the next "git commit", which has been + corrected. + + * Various bugs in "git rebase -r" have been fixed. + + * mmap() imitation used to call xmalloc() that dies upon malloc() + failure, which has been corrected to just return an error to the + caller to be handled. + + * "git diff --relative" segfaulted and/or produced incorrect result + when there are unmerged paths. + + * The delayed checkout code path in "git checkout" etc. were chatty + even when --quiet and/or --no-progress options were given. + + * "git branch -D <branch>" used to refuse to remove a broken branch + ref that points at a missing commit, which has been corrected. + + * Build update for Apple clang. + + * The parser for the "--nl" option of "git column" has been + corrected. + + * "git upload-pack" which runs on the other side of "git fetch" + forgot to take the ref namespaces into account when handling + want-ref requests. + + * The sparse-index support can corrupt the index structure by storing + a stale and/or uninitialized data, which has been corrected. + + * Buggy tests could damage repositories outside the throw-away test + area we created. We now by default export GIT_CEILING_DIRECTORIES + to limit the damage from such a stray test. + + * Even when running "git send-email" without its own threaded + discussion support, a threading related header in one message is + carried over to the subsequent message to result in an unwanted + threading, which has been corrected. + + * The output from "git fast-export", when its anonymization feature + is in use, showed an annotated tag incorrectly. + + * Recent "diff -m" changes broke "gitk", which has been corrected. + + * The "git apply -3" code path learned not to bother the lower level + merge machinery when the three-way merge can be trivially resolved + without the content level merge. This fixes a regression caused by + recent "-3way first and fall back to direct application" change. + + * The code that optionally creates the *.rev reverse index file has + been optimized to avoid needless computation when it is not writing + the file out. + + * "git range-diff -I... <range> <range>" segfaulted, which has been + corrected. + + * The order in which various files that make up a single (conceptual) + packfile has been reevaluated and straightened up. This matters in + correctness, as an incomplete set of files must not be shown to a + running Git. + + * The "mode" word is useless in a call to open(2) that does not + create a new file. Such a call in the files backend of the ref + subsystem has been cleaned up. + + * "git update-ref --stdin" failed to flush its output as needed, + which potentially led the conversation to a deadlock. + + * When "git am --abort" fails to abort correctly, it still exited + with exit status of 0, which has been corrected. + + * Correct nr and alloc members of strvec struct to be of type size_t. + + * "git stash", where the tentative change involves changing a + directory to a file (or vice versa), was confused, which has been + corrected. + + * "git clone" from a repository whose HEAD is unborn into a bare + repository didn't follow the branch name the other side used, which + is corrected. + + * "git cvsserver" had a long-standing bug in its authentication code, + which has finally been corrected (it is unclear and is a separate + question if anybody is seriously using it, though). + + * "git difftool --dir-diff" mishandled symbolic links. + + * Sensitive data in the HTTP trace were supposed to be redacted, but + we failed to do so in HTTP/2 requests. + + * "make clean" has been updated to remove leftover .depend/ + directories, even when it is not told to use them to compute header + dependencies. + + * Protocol v0 clients can get stuck parsing a malformed feature line. + + * A few kinds of changes "git status" can show were not documented. + (merge d2a534c515 ja/doc-status-types-and-copies later to maint). + + * The mergesort implementation used to sort linked list has been + optimized. + (merge c90cfc225b rs/mergesort later to maint). + + * An editor session launched during a Git operation (e.g. during 'git + commit') can leave the terminal in a funny state. The code path + has updated to save the terminal state before, and restore it + after, it spawns an editor. + (merge 3d411afabc cm/save-restore-terminal later to maint). + + * "git cat-file --batch" with the "--batch-all-objects" option is + supposed to iterate over all the objects found in a repository, but + it used to translate these object names using the replace mechanism, + which defeats the point of enumerating all objects in the repository. + This has been corrected. + (merge bf972896d7 jk/cat-file-batch-all-wo-replace later to maint). + + * Recent sparse-index work broke safety against attempts to add paths + with trailing slashes to the index, which has been corrected. + (merge c8ad9d04c6 rs/make-verify-path-really-verify-again later to maint). + + * The "--color-lines" and "--color-by-age" options of "git blame" + have been missing, which are now documented. + (merge 8c32856133 bs/doc-blame-color-lines later to maint). + + * The PATH used in CI job may be too wide and let incompatible dlls + to be grabbed, which can cause the build&test to fail. Tighten it. + (merge 7491ef6198 js/windows-ci-path-fix later to maint). + + * Avoid performance measurements from getting ruined by gc and other + housekeeping pauses interfering in the middle. + (merge be79131a53 rs/disable-gc-during-perf-tests later to maint). + + * Stop "git add --dry-run" from creating new blob and tree objects. + (merge e578d0311d rs/add-dry-run-without-objects later to maint). + + * "git commit" gave duplicated error message when the object store + was unwritable, which has been corrected. + (merge 4ef91a2d79 ab/fix-commit-error-message-upon-unwritable-object-store later to maint). + + * Recent sparse-index addition, namely any use of index_name_pos(), + can expand sparse index entries and breaks any code that walks + cache-tree or existing index entries. One such instance of such a + breakage has been corrected. + + * The xxdiff difftool backend can exit with status 128, which the + difftool-helper that launches the backend takes as a significant + failure, when it is not significant at all. Work it around. + (merge 571f4348dd da/mergetools-special-case-xxdiff-exit-128 later to maint). + + * Improve test framework around unwritable directories. + (merge 5d22e18965 ab/test-cleanly-recreate-trash-directory later to maint). + + * "git push" client talking to an HTTP server did not diagnose the + lack of the final status report from the other side correctly, + which has been corrected. + (merge c5c3486f38 jk/http-push-status-fix later to maint). + + * Update "git archive" documentation and give explicit mention on the + compression level for both zip and tar.gz format. + (merge c4b208c309 bs/archive-doc-compression-level later to maint). + + * Drop "git sparse-checkout" from the list of common commands. + (merge 6a9a50a8af sg/sparse-index-not-that-common-a-command later to maint). + + * "git branch -c/-m new old" was not described to copy config, which + has been corrected. + (merge 8252ec300e jc/branch-copy-doc later to maint). + + * Squelch over-eager warning message added during this cycle. + + * Fix long-standing shell syntax error in the completion script. + (merge 46b0585286 re/completion-fix-test-equality later to maint). + + * Teach "git commit-graph" command not to allow using replace objects + at all, as we do not use the commit-graph at runtime when we see + object replacement. + (merge 095d112f8c ab/ignore-replace-while-working-on-commit-graph later to maint). + + * "git pull --no-verify" did not affect the underlying "git merge". + (merge 47bfdfb3fd ar/fix-git-pull-no-verify later to maint). + + * One CI task based on Fedora image noticed a not-quite-kosher + construct recently, which has been corrected. + + * "git pull --ff-only" and "git pull --rebase --ff-only" should make + it a no-op to attempt pulling from a remote that is behind us, but + instead the command errored out by saying it was impossible to + fast-forward, which may technically be true, but not a useful thing + to diagnose as an error. This has been corrected. + (merge 361cb52383 jc/fix-pull-ff-only-when-already-up-to-date later to maint). + + * The way Cygwin emulates a unix-domain socket, on top of which the + simple-ipc mechanism is implemented, can race with the program on + the other side that wants to use the socket, and briefly make it + appear as a regular file before lstat(2) starts reporting it as a + socket. We now have a workaround on the side that connects to a + unix domain socket. + + * Other code cleanup, docfix, build fix, etc. + (merge f188160be9 ab/bundle-remove-verbose-option later to maint). + (merge 8c6b4332b4 rs/close-pack-leakfix later to maint). + (merge 51b04c05b7 bs/difftool-msg-tweak later to maint). + (merge dd20e4a6db ab/make-compdb-fix later to maint). + (merge 6ffb990dc4 os/status-docfix later to maint). + (merge 100c2da2d3 rs/p3400-lose-tac later to maint). + (merge 76f3b69896 tb/aggregate-ignore-leading-whitespaces later to maint). + (merge 6e4fd8bfcd tz/doc-link-to-bundle-format-fix later to maint). + (merge f6c013dfa1 jc/doc-commit-header-continuation-line later to maint). + (merge ec9a37d69b ab/pkt-line-cleanup later to maint). + (merge 8650c6298c ab/fix-make-lint-docs later to maint). + (merge 1c720357ce ab/test-lib-diff-cleanup later to maint). + (merge 6b615dbece ks/submodule-add-message-fix later to maint). + (merge 203eb8381a jc/doc-format-patch-clarify-auto-base later to maint). + (merge 559664c792 ab/test-lib later to maint). |