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diff --git a/Documentation/RelNotes/2.38.0.txt b/Documentation/RelNotes/2.38.0.txt new file mode 100644 index 0000000..870581f --- /dev/null +++ b/Documentation/RelNotes/2.38.0.txt @@ -0,0 +1,404 @@ +Git v2.38 Release Notes +======================= + +UI, Workflows & Features + + * "git remote show [-n] frotz" now pays attention to negative + pathspec. + + * "git push" sometimes performs poorly when reachability bitmaps are + used, even in a repository where other operations are helped by + bitmaps. The push.useBitmaps configuration variable is introduced + to allow disabling use of reachability bitmaps only for "git push". + + * "git grep -m<max-hits>" is a way to limit the hits shown per file. + + * "git merge-tree" learned a new mode where it takes two commits and + computes a tree that would result in the merge commit, if the + histories leading to these two commits were to be merged. + + * "git mv A B" in a sparsely populated working tree can be asked to + move a path between directories that are "in cone" (i.e. expected + to be materialized in the working tree) and "out of cone" + (i.e. expected to be hidden). The handling of such cases has been + improved. + + * Earlier, HTTP transport clients learned to tell the server side + what locale they are in by sending Accept-Language HTTP header, but + this was done only for some requests but not others. + + * Introduce a safe.barerepository configuration variable that + allows users to forbid discovery of bare repositories. + + * Various messages that come from the pack-bitmap codepaths have been + tweaked. + + * "git rebase -i" learns to update branches whose tip appear in the + rebased range with "--update-refs" option. + + * "git ls-files" learns the "--format" option to tweak its output. + + * "git cat-file" learned an option to use the mailmap when showing + commit and tag objects. + + * When "git merge" finds that it cannot perform a merge, it should + restore the working tree to the state before the command was + initiated, but in some corner cases it didn't. + + * Operating modes like "--batch" of "git cat-file" command learned to + take NUL-terminated input, instead of one-item-per-line. + + * "git rm" has become more aware of the sparse-index feature. + + * "git rev-list --disk-usage" learned to take an optional value + "human" to show the reported value in human-readable format, like + "3.40MiB". + + * The "diagnose" feature to create a zip archive for diagnostic + material has been lifted from "scalar" and made into a feature of + "git bugreport". + + * The namespaces used by "log --decorate" from "refs/" hierarchy by + default has been tightened. + + * "git rev-list --ancestry-path=C A..B" is a natural extension of + "git rev-list A..B"; instead of choosing a subset of A..B to those + that have ancestry relationship with A, it lets a subset with + ancestry relationship with C. + + * "scalar" now enables built-in fsmonitor on enlisted repositories, + when able. + + * The bash prompt (in contrib/) learned to optionally indicate when + the index is unmerged. + + * "git clone" command learned the "--bundle-uri" option to coordinate + with hosting sites the use of pre-prepared bundle files. + + * "git range-diff" learned to honor pathspec argument if given. + + * "git format-patch --from=<ident>" can be told to add an in-body + "From:" line even for commits that are authored by the given + <ident> with "--force-in-body-from" option. + + * The built-in fsmonitor refuses to work on a network mounted + repositories; a configuration knob for users to override this has + been introduced. + + * The "scalar" addition from Microsoft is now part of the core Git + installation. + + +Performance, Internal Implementation, Development Support etc. + + * Collection of what is referenced by objects in promisor packs have + been optimized to inspect these objects in the in-pack order. + + * Introduce a helper to see if a branch is already being worked on + (hence should not be newly checked out in a working tree), which + performs much better than the existing find_shared_symref() to + replace many uses of the latter. + + * Teach "git archive" to (optionally and then by default) avoid + spawning an external "gzip" process when creating ".tar.gz" (and + ".tgz") archives. + + * Allow large objects read from a packstream to be streamed into a + loose object file straight, without having to keep it in-core as a + whole. + + * Further preparation to turn git-submodule.sh into a builtin + continues. + + * Apply Coccinelle rule to turn raw memmove() into MOVE_ARRAY() cpp + macro, which would improve maintainability and readability. + + * Teach "make all" to build gitweb as well. + + * Tweak tests so that they still work when the "git init" template + did not create .git/info directory. + + * Add Coccinelle rules to detect the pattern of initializing and then + finalizing a structure without using it in between at all, which + happens after code restructuring and the compilers fail to + recognize as an unused variable. + + * The code to convert between GPG trust level strings and internal + constants we use to represent them have been cleaned up. + + * Support for libnettle as SHA256 implementation has been added. + + * The way "git multi-pack" uses parse-options API has been improved. + + * A Coccinelle rule (in contrib/) to encourage use of COPY_ARRAY + macro has been improved. + + * API tweak to make it easier to run fuzz testing on commit-graph parser. + + * Omit fsync-related trace2 entries when their values are all zero. + + * The codepath to write multi-pack index has been taught to release a + large chunk of memory that holds an array of objects in the packs, + as soon as it is done with the array, to reduce memory consumption. + + * Add a level of redirection to array allocation API in xdiff part, + to make it easier to share with the libgit2 project. + + * "git fetch" client logs the partial clone filter used in the trace2 + output. + + * The "bundle URI" design gets documented. + + * The common ancestor negotiation exchange during a "git fetch" + session now leaves trace log. + + * Test portability improvements. + (merge 4d1d843be7 mt/rot13-in-c later to maint). + + * The "subcommand" mode is introduced to parse-options API and update + the command line parser of Git commands with subcommands. + + * The pack bitmap file gained a bitmap-lookup table to speed up + locating the necessary bitmap for a given commit. + + * The assembly version of SHA-1 implementation for PPC has been + removed. + + * The server side that responds to "git fetch" and "git clone" + request has been optimized by allowing it to send objects in its + object store without recomputing and validating the object names. + + * Annotate function parameters that are not used (but cannot be + removed for structural reasons), to prepare us to later compile + with -Wunused warning turned on. + + * Share the text used to explain configuration variables used by "git + <subcmd>" in "git help <subcmd>" with the text from "git help config". + + * "git mv A B" in a sparsely populated working tree can be asked to + move a path from a directory that is "in cone" to another directory + that is "out of cone". Handling of such a case has been improved. + + * The chainlint script for our tests has been revamped. + + +Fixes since v2.37 +----------------- + + * Rewrite of "git add -i" in C that appeared in Git 2.25 didn't + correctly record a removed file to the index, which was fixed. + + * Certain diff options are currently ignored when combined-diff is + shown; mark them as incompatible with the feature. + + * Adjust technical/bitmap-format to be formatted by AsciiDoc, and + add some missing information to the documentation. + + * Fixes for tests when the source directory has unusual characters in + its path, e.g. whitespaces, double-quotes, etc. + + * "git mktree --missing" lazily fetched objects that are missing from + the local object store, which was totally unnecessary for the purpose + of creating the tree object(s) from its input. + + * Give _() markings to fatal/warning/usage: labels that are shown in + front of these messages. + + * References to commands-to-be-typed-literally in "git rebase" + documentation mark-up have been corrected. + + * In a non-bare repository, the behavior of Git when the + core.worktree configuration variable points at a directory that has + a repository as its subdirectory, regressed in Git 2.27 days. + + * Recent update to vimdiff layout code has been made more robust + against different end-user vim settings. + + * Plug various memory leaks, both in the main code and in test-tool + commands. + + * Fixes a long-standing corner case bug around directory renames in + the merge-ort strategy. + + * The resolve-undo information in the index was not protected against + GC, which has been corrected. + + * A corner case bug where lazily fetching objects from a promisor + remote resulted in infinite recursion has been corrected. + + * "git clone" from a repository with some ref whose HEAD is unborn + did not set the HEAD in the resulting repository correctly, which + has been corrected. + + * An earlier attempt to plug leaks placed a clean-up label to jump to + at a bogus place, which as been corrected. + + * Variable quoting fix in the vimdiff driver of "git mergetool" + + * "git shortlog -n" relied on the underlying qsort() to be stable, + which shouldn't have. Fixed. + + * A fix for a regression in test framework. + + * mkstemp() emulation on Windows has been improved. + + * Add missing documentation for "include" and "includeIf" features in + "git config" file format, which incidentally teaches the command + line completion to include them in its offerings. + + * Avoid "white/black-list" in documentation and code comments. + + * Workaround for a compiler warning against use of die() in + osx-keychain (in contrib/). + + * Workaround for a false positive compiler warning. + + * "git p4" working on UTF-16 files on Windows did not implement + CRLF-to-LF conversion correctly, which has been corrected. + + * "git p4" did not handle non-ASCII client name well, which has been + corrected. + + * "rerere-train" script (in contrib/) used to honor commit.gpgSign + while recreating the throw-away merges. + + * "git checkout" miscounted the paths it updated, which has been + corrected. + + * Fix for a bug that makes write-tree to fail to write out a + non-existent index as a tree, introduced in 2.37. + + * There was a bug in the codepath to upgrade generation information + in commit-graph from v1 to v2 format, which has been corrected. + + * Gitweb had legacy URL shortener that is specific to the way + projects hosted on kernel.org used to (but no longer) work, which + has been removed. + + * Fix build procedure for Windows that uses CMake so that it can pick + up the shell interpreter from local installation location. + + * Conditionally allow building Python interpreter on Windows + + * Fix to lstat() emulation on Windows. + + * Older gcc with -Wall complains about the universal zero initializer + "struct s = { 0 };" idiom, which makes developers' lives + inconvenient (as -Werror is enabled by DEVELOPER=YesPlease). The + build procedure has been tweaked to help these compilers. + + * Plug memory leaks in the failure code path in the "merge-ort" merge + strategy backend. + + * "git symbolic-ref symref non..sen..se" is now diagnosed as an error. + + * A follow-up fix to a fix for a regression in 2.36 around hooks. + + * Avoid repeatedly running getconf to ask libc version in the test + suite, and instead just as it once per script. + + * Platform-specific code that determines if a directory is OK to use + as a repository has been taught to report more details, especially + on Windows. + + * "vimdiff3" regression fix. + + * "git fsck" reads mode from tree objects but canonicalizes the mode + before passing it to the logic to check object sanity, which has + hid broken tree objects from the checking logic. This has been + corrected, but to help existing projects with broken tree objects + that they cannot fix retroactively, the severity of anomalies this + code detects has been demoted to "info" for now. + + * Fixes to sparse index compatibility work for "reset" and "checkout" + commands. + + * An earlier optimization discarded a tree-object buffer that is + still in use, which has been corrected. + + * Fix deadlocks between main Git process and subprocess spawned via + the pipe_command() API, that can kill "git add -p" that was + reimplemented in C recently. + + * The sequencer machinery translated messages left in the reflog by + mistake, which has been corrected. + + * xcalloc(), imitating calloc(), takes "number of elements of the + array", and "size of a single element", in this order. A call that + does not follow this ordering has been corrected. + + * The preload-index codepath made copies of pathspec to give to + multiple threads, which were left leaked. + + * Update the version of Ubuntu used for GitHub Actions CI from 18.04 + to 22.04. + + * The auto-stashed local changes created by "git merge --autostash" + was mixed into a conflicted state left in the working tree, which + has been corrected. + + * Multi-pack index got corrupted when preferred pack changed from one + pack to another in a certain way, which has been corrected. + (merge 99e4d084ff tb/midx-with-changing-preferred-pack-fix later to maint). + + * The clean-up of temporary files created via mks_tempfile_dt() was + racy and attempted to unlink() the leading directory when signals + are involved, which has been corrected. + (merge babe2e0559 rs/tempfile-cleanup-race-fix later to maint). + + * FreeBSD portability fix for "git maintenance" that spawns "crontab" + to schedule tasks. + (merge ee69e7884e bc/gc-crontab-fix later to maint). + + * Those who use diff-so-fancy as the diff-filter noticed a regression + or two in the code that parses the diff output in the built-in + version of "add -p", which has been corrected. + (merge 0a101676e5 js/add-p-diff-parsing-fix later to maint). + + * Segfault fix-up to an earlier fix to the topic to teach "git reset" + and "git checkout" work better in a sparse checkout. + (merge 037f8ea6d9 vd/sparse-reset-checkout-fixes later to maint). + + * "git diff --no-index A B" managed its the pathnames of its two + input files rather haphazardly, sometimes leaking them. The + command line argument processing has been straightened out to clean + it up. + (merge 2b43dd0eb5 rs/diff-no-index-cleanup later to maint). + + * "git rev-list --verify-objects" ought to inspect the contents of + objects and notice corrupted ones, but it didn't when the commit + graph is in use, which has been corrected. + (merge b27ccae34b jk/rev-list-verify-objects-fix later to maint). + + * More fixes to "add -p" + (merge 64ec8efb83 js/builtin-add-p-portability-fix later to maint). + + * The parser in the script interface to parse-options in "git + rev-parse" has been updated to diagnose a bogus input correctly. + (merge f20b9c36d0 ow/rev-parse-parseopt-fix later to maint). + + * The code that manages list-object-filter structure, used in partial + clones, leaked the instances, which has been plugged. + (merge 66eede4a37 jk/plug-list-object-filter-leaks later to maint). + + * Fix another UI regression in the reimplemented "add -p". + (merge f6f0ee247f rs/add-p-worktree-mode-prompt-fix later to maint). + + * "git fetch" over protocol v2 sent an incorrect ref prefix request + to the server and made "git pull" with configured fetch refspec + that does not cover the remote branch to merge with fail, which has + been corrected. + (merge 49ca2fba39 jk/proto-v2-ref-prefix-fix later to maint). + + * A result from opendir() was leaking in the commit-graph expiration + codepath, which has been plugged. + (merge 12f1ae5324 ml/commit-graph-expire-dir-leak-fix later to maint). + + * Just like we have coding guidelines, we now have guidelines for + reviewers. + (merge e01b851923 vd/doc-reviewing-guidelines later to maint). + + * Other code cleanup, docfix, build fix, etc. + (merge 77b9e85c0f vd/fix-perf-tests later to maint). + (merge 0682bc43f5 jk/test-crontab-fixes later to maint). + (merge b46dd1726c cc/doc-trailer-whitespace-rules later to maint). |