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1 Git v2.39 Release Notes
2 =======================
4 UI, Workflows & Features
5 ------------------------
7 * "git grep" learned to expand the sparse-index more lazily and on
8 demand in a sparse checkout.
10 * By default, use of fsmonitor on a repository on networked
11 filesystem is disabled. Add knobs to make it workable on macOS.
13 * After checking out a "branch" that is a symbolic-ref that points at
14 another branch, "git symbolic-ref HEAD" reports the underlying
15 branch, not the symbolic-ref the user gave checkout as argument.
16 The command learned the "--no-recurse" option to stop after
17 dereferencing a symbolic-ref only once.
19 * "git branch --edit-description @{-1}" is now a way to edit branch
20 description of the branch you were on before switching to the
21 current branch.
23 * "git merge-tree --stdin" is a new way to request a series of merges
24 and report the merge results.
26 * "git shortlog" learned to group by the "format" string.
28 * A new "--include-whitespace" option is added to "git patch-id", and
29 existing bugs in the internal patch-id logic that did not match
30 what "git patch-id" produces have been corrected.
32 * Enable gc.cruftpacks by default for those who opt into
33 feature.experimental setting.
35 * "git repack" learns to send cruft objects out of the way into
36 packfiles outside the repository.
38 Performance, Internal Implementation, Development Support etc.
39 --------------------------------------------------------------
41 * With a bit of header twiddling, use the native regexp library on
42 macOS instead of the compat/ one.
44 * Prepare for GNU [ef]grep that throw warning of their uses.
46 * Sources related to fuzz testing have been moved down to their own
47 directory.
49 * Most credential helpers ignored unknown entries in a credential
50 description, but a few died upon seeing them. The latter were
51 taught to ignore them, too
53 * "scalar unregister" in a repository that is already been
54 unregistered reported an error.
56 * Remove error detection from a function that fetches from promisor
57 remotes, and make it die when such a fetch fails to bring all the
58 requested objects, to give an early failure to various operations.
60 * Update CodingGuidelines to clarify what features to use and avoid
61 in C99.
63 * Avoid false-positive from LSan whose assumption may be broken with
64 higher optimization levels.
66 * Enable address and undefined sanitizer tasks at GitHub Actions CI.
68 * More UNUSED annotation to help using -Wunused option with the
69 compiler.
70 (merge 4b992f0a24 jk/unused-anno-more later to maint).
72 * Rewrite a deep recursion in the skipping negotiator to use a loop
73 with on-heap prio queue to avoid stack wastage.
75 * Add documentation for message IDs in fsck error messages.
77 * Define the logical elements of a "bundle list", data structure to
78 store them in-core, format to transfer them, and code to parse
79 them.
81 * The role the security mailing list plays in an embargoed release
82 has been documented.
84 * Two new facilities, "timer" and "counter", are introduced to the
85 trace2 API.
87 * Code simplification by using strvec_pushf() instead of building an
88 argument in a separate strbuf.
90 * Make sure generated dependency file is stably sorted to help
91 developers debugging their build issues.
93 * The glossary entries for "commit-graph file" and "reachability
94 bitmap" have been added.
96 * Various tests exercising the transfer.credentialsInUrl
97 configuration are taught to avoid making requests which require
98 resolving localhost to reduce CI-flakiness.
100 * A redundant diagnostic message is dropped from test_path_is_missing().
102 * Simplify the run-command API.
104 * Update the actions/github-script dependency in CI to avoid a
105 deprecation warning.
107 * Progress on being able to initialize a rev_info struct with a
108 macro.
110 * Add trace2 counters to the region to clear skip worktree bits in a
111 sparse checkout.
113 * Modernize test script to avoid "test -f" and friends.
115 * Avoid calling 'cache_tree_update()' when doing so would be
116 redundant.
118 * Update the credential-cache documentation to provide a more
119 realistic example.
121 * Makefile comments updates and reordering to clarify knobs used to
122 choose SHA implementations.
124 * A design document for sparse-checkout's future directions has been
125 added.
127 Fixes since v2.38
128 -----------------
130 * The codepath that reads from the index v4 had unaligned memory
131 accesses, which has been corrected.
133 * Fix messages incorrectly marked for translation.
135 * "git fsck" failed to release contents of tree objects already used
136 from the memory, which has been fixed.
138 * "git clone" did not like to see the "--bare" and the "--origin"
139 options used together without a good reason.
141 * "git remote rename" failed to rename a remote without fetch
142 refspec, which has been corrected.
144 * Documentation on various Boolean GIT_* environment variables have
145 been clarified.
147 * "git rebase -i" can mistakenly attempt to apply a fixup to a commit
148 itself, which has been corrected.
150 * "git multi-pack-index repack/expire" used to repack unreachable
151 cruft into a new pack, which have been corrected.
153 * In read-only repositories, "git merge-tree" tried to come up with a
154 merge result tree object, which it failed (which is not wrong) and
155 led to a segfault (which is bad), which has been corrected.
157 * Force C locale while running tests around httpd to make sure we can
158 find expected error messages in the log.
160 * Fix a logic in "mailinfo -b" that miscomputed the length of a
161 substring, which lead to an out-of-bounds access.
163 * The codepath to sign learned to report errors when it fails to read
164 from "ssh-keygen".
166 * Code clean-up that results in plugging a leak.
168 * "GIT_EDITOR=: git branch --edit-description" resulted in failure,
169 which has been corrected.
171 * The code to clean temporary object directories (used for
172 quarantine) tried to remove them inside its signal handler, which
173 was a no-no.
175 * Update comment in the Makefile about the RUNTIME_PREFIX config knob.
177 * Clarify that "the sentence after <area>: prefix does not begin with
178 a capital letter" rule applies only to the commit title.
180 * "git branch --edit-description" on an unborh branch misleadingly
181 said that no such branch exists, which has been corrected.
183 * Work around older clang that warns against C99 zero initialization
184 syntax for struct.
186 * Giving "--invert-grep" and "--all-match" without "--grep" to the
187 "git log" command resulted in an attempt to access grep pattern
188 expression structure that has not been allocated, which has been
189 corrected.
190 (merge db84376f98 ab/grep-simplify-extended-expression later to maint).
192 * "git diff rev^!" did not show combined diff to go to the rev from
193 its parents.
194 (merge a79c6b6081 rs/diff-caret-bang-with-parents later to maint).
196 * Allow configuration files in "protected" scopes to include other
197 configuration files.
198 (merge ecec57b3c9 gc/bare-repo-discovery later to maint).
200 * Give a bit more diversity to macOS CI by using sha1dc in one of the
201 jobs (the other one tests Apple Common Crypto).
202 (merge 1ad5c3df35 jc/ci-osx-with-sha1dc later to maint).
204 * A bugfix with tracing support in midx codepath
205 (merge e9c3839944 tb/midx-bitmap-selection-fix later to maint).
207 * When geometric repacking feature is in use together with the
208 --pack-kept-objects option, we lost packs marked with .keep files.
209 (merge 197443e80a tb/save-keep-pack-during-geometric-repack later to maint).
211 * Move a global variable added as a hack during regression fixes to
212 its proper place in the API.
213 (merge 0b0ab95f17 ab/run-hook-api-cleanup later to maint).
215 * Update to build procedure with VS using CMake/CTest.
216 (merge c858750b41 js/cmake-updates later to maint).
218 * The short-help text shown by "git cmd -h" and the synopsis text
219 shown at the beginning of "git help cmd" have been made more
220 consistent.
222 * When creating a multi-pack bitmap, remove per-pack bitmap files
223 unconditionally as they will never be consulted.
224 (merge 55d902cd61 tb/remove-unused-pack-bitmap later to maint).
226 * Fix a longstanding syntax error in Git.pm error codepath.
228 * "git diff --stat" etc. were invented back when everything was ASCII
229 and strlen() was a way to measure the display width of a string;
230 adjust them to compute the display width assuming UTF-8 pathnames.
231 (merge ce8529b2bb tb/diffstat-with-utf8-strwidth later to maint).
233 * "git branch --edit-description" can exit with status -1 which is
234 not a good practice; it learned to use 1 as everybody else instead.
236 * "git apply" limits its input to a bit less than 1 GiB.
238 * Merging a branch with directory renames into a branch that changes
239 the directory to a symlink was mishandled by the ort merge
240 strategy, which has been corrected.
242 * A bugfix to "git subtree" in its split and merge features.
244 * Fix some bugs in the reflog messages when rebasing and changes the
245 reflog messages of "rebase --apply" to match "rebase --merge" with
246 the aim of making the reflog easier to parse.
248 * "git rebase --keep-base" used to discard the commits that are
249 already cherry-picked to the upstream, even when "keep-base" meant
250 that the base, on top of which the history is being rebuilt, does
251 not yet include these cherry-picked commits. The --keep-base
252 option now implies --reapply-cherry-picks and --no-fork-point
253 options.
255 * The way "git repack" creared temporary files when it received a
256 signal was prone to deadlocking, which has been corrected.
258 * Various tests exercising the transfer.credentialsInUrl
259 configuration are taught to avoid making requests which require
260 resolving localhost to reduce CI-flakiness.
262 * The adjust_shared_perm() helper function learned to refrain from
263 setting the "g+s" bit on directories when it is not necessary.
265 * "git archive" mistakenly complained twice about a missing
266 executable, which has been corrected.
268 * Fix a bug where `git branch -d` did not work on an orphaned HEAD.
270 * `git rebase --update-refs` would delete references when all
271 `update-ref` commands in the sequencer were removed, which has been
272 corrected.
274 * Other code cleanup, docfix, build fix, etc.
275 (merge 413bc6d20a ds/cmd-main-reorder later to maint).
276 (merge 8d2863e4ed nw/t1002-cleanup later to maint).