[git/git.git] / Documentation / RelNotes / 2.23.0.txt
1 Git 2.23 Release Notes
2 ======================
4 Updates since v2.22
5 -------------------
7 Backward compatibility note
9 * The "--base" option of "format-patch" computed the patch-ids for
10 prerequisite patches in an unstable way, which has been updated to
11 compute in a way that is compatible with "git patch-id --stable".
14 UI, Workflows & Features
16 * The "git fast-export/import" pair has been taught to handle commits
17 with log messages in encoding other than UTF-8 better.
19 * In recent versions of Git, per-worktree refs are exposed in
20 refs/worktrees/<wtname>/ hierarchy, which means that worktree names
21 must be a valid refname component. The code now sanitizes the names
22 given to worktrees, to make sure these refs are well-formed.
24 * "git merge" learned "--quit" option that cleans up the in-progress
25 merge while leaving the working tree and the index still in a mess.
27 * "git format-patch" learns a configuration to set the default for
28 its --notes=<ref> option.
30 * The code to show args with potential typo that cannot be
31 interpreted as a commit-ish has been improved.
33 * "git clone --recurse-submodules" learned to set up the submodules
34 to ignore commit object names recorded in the superproject gitlink
35 and instead use the commits that happen to be at the tip of the
36 remote-tracking branches from the get-go, by passing the new
37 "--remote-submodules" option.
39 * The pattern "git diff/grep" use to extract funcname and words
40 boundary for Matlab has been extend to cover Octave, which is more
41 or less equivalent.
43 * "git help git" was hard to discover (well, at least for some
44 people).
46 * The pattern "git diff/grep" use to extract funcname and words
47 boundary for Rust has been added.
49 * "git status" can be told a non-standard default value for the
50 "--[no-]ahead-behind" option with a new configuration variable
51 status.aheadBehind.
53 * "git fetch" and "git pull" reports when a fetch results in
54 non-fast-forward updates to let the user notice unusual situation.
55 The commands learned "--no-shown-forced-updates" option to disable
56 this safety feature.
58 * Two new commands "git switch" and "git restore" are introduced to
59 split "checking out a branch to work on advancing its history" and
60 "checking out paths out of the index and/or a tree-ish to work on
61 advancing the current history" out of the single "git checkout"
62 command.
64 * "git branch --list" learned to always output the detached HEAD as
65 the first item (when the HEAD is detached, of course), regardless
66 of the locale.
68 * The conditional inclusion mechanism learned to base the choice on
69 the branch the HEAD currently is on.
71 * "git rev-list --objects" learned with "--no-object-names" option to
72 squelch the path to the object that is used as a grouping hint for
73 pack-objects.
75 * A new tag.gpgSign configuration variable turns "git tag -a" into
76 "git tag -s".
78 * "git multi-pack-index" learned expire and repack subcommands.
80 * "git blame" learned to "ignore" commits in the history, whose
81 effects (as well as their presence) get ignored.
83 * "git cherry-pick/revert" learned a new "--skip" action.
85 * The tips of refs from the alternate object store can be used as
86 starting point for reachability computation now.
88 * Extra blank lines in "git status" output have been reduced.
90 * The commits in a repository can be described by multiple
91 commit-graph files now, which allows the commit-graph files to be
92 updated incrementally.
94 * The "git log" command learns to issue a warning when log.mailmap
95 configuration is not set and --[no-]mailmap option is not used, to
96 prepare users for future versions of Git that uses the mailmap by
97 default.
99 * "git range-diff" output has been tweaked for easier identification
100 of which part of what file the patch shown is about.
103 Performance, Internal Implementation, Development Support etc.
105 * Update supporting parts of "git rebase" to remove code that should
106 no longer be used.
108 * Developer support to emulate unsatisfied prerequisites in tests to
109 ensure that the remainer of the tests still succeeds when tests
110 with prerequisites are skipped.
112 * "git update-server-info" learned not to rewrite the file with the
113 same contents.
115 * The way of specifying the path to find dynamic libraries at runtime
116 has been simplified. The old default to pass -R/path/to/dir has been
117 replaced with the new default to pass -Wl,-rpath,/path/to/dir,
118 which is the more recent GCC uses. Those who need to build with an
119 old GCC can still use "CC_LD_DYNPATH=-R"
121 * Prepare use of reachability index in topological walker that works
122 on a range (A..B).
124 * A new tutorial targetting specifically aspiring git-core
125 developers has been added.
127 * Auto-detect how to tell HP-UX aCC where to use dynamically linked
128 libraries from at runtime.
130 * "git mergetool" and its tests now spawn fewer subprocesses.
132 * Dev support update to help tracing out tests.
134 * Support to build with MSVC has been updated.
136 * "git fetch" that grabs from a group of remotes learned to run the
137 auto-gc only once at the very end.
139 * A handful of Windows build patches have been upstreamed.
141 * The code to read state files used by the sequencer machinery for
142 "git status" has been made more robust against a corrupt or stale
143 state files.
145 * "git for-each-ref" with multiple patterns have been optimized.
147 * The tree-walk API learned to pass an in-core repository
148 instance throughout more codepaths.
150 * When one step in multi step cherry-pick or revert is reset or
151 committed, the command line prompt script failed to notice the
152 current status, which has been improved.
154 * Many GIT_TEST_* environment variables control various aspects of
155 how our tests are run, but a few followed "non-empty is true, empty
156 or unset is false" while others followed the usual "there are a few
157 ways to spell true, like yes, on, etc., and also ways to spell
158 false, like no, off, etc." convention.
160 * Adjust the dir-iterator API and apply it to the local clone
161 optimization codepath.
163 * We have been trying out a few language features outside c89; the
164 coding guidelines document did not talk about them and instead had
165 a blanket ban against them.
167 * A test helper has been introduced to optimize preparation of test
168 repositories with many simple commits, and a handful of test
169 scripts have been updated to use it.
172 Fixes since v2.22
173 -----------------
175 * A relative pathname given to "git init --template=<path> <repo>"
176 ought to be relative to the directory "git init" gets invoked in,
177 but it instead was made relative to the repository, which has been
178 corrected.
180 * "git worktree add" used to fail when another worktree connected to
181 the same repository was corrupt, which has been corrected.
183 * The ownership rule for the file descriptor to fast-import remote
184 backend was mixed up, leading to unrelated file descriptor getting
185 closed, which has been fixed.
187 * A "merge -c" instruction during "git rebase --rebase-merges" should
188 give the user a chance to edit the log message, even when there is
189 otherwise no need to create a new merge and replace the existing
190 one (i.e. fast-forward instead), but did not. Which has been
191 corrected.
193 * Code cleanup and futureproof.
195 * More parameter validation.
197 * "git update-server-info" used to leave stale packfiles in its
198 output, which has been corrected.
200 * The server side support for "git fetch" used to show incorrect
201 value for the HEAD symbolic ref when the namespace feature is in
202 use, which has been corrected.
204 * "git am -i --resolved" segfaulted after trying to see a commit as
205 if it were a tree, which has been corrected.
207 * "git bundle verify" needs to see if prerequisite objects exist in
208 the receiving repository, but the command did not check if we are
209 in a repository upfront, which has been corrected.
211 * "git merge --squash" is designed to update the working tree and the
212 index without creating the commit, and this cannot be countermanded
213 by adding the "--commit" option; the command now refuses to work
214 when both options are given.
216 * The data collected by fsmonitor was not properly written back to
217 the on-disk index file, breaking t7519 tests occasionally, which
218 has been corrected.
220 * Update to Unicode 12.1 width table.
222 * The command line to invoke a "git cat-file" command from inside
223 "git p4" was not properly quoted to protect a caret and running a
224 broken command on Windows, which has been corrected.
226 * "git request-pull" learned to warn when the ref we ask them to pull
227 from in the local repository and in the published repository are
228 different.
230 * When creating a partial clone, the object filtering criteria is
231 recorded for the origin of the clone, but this incorrectly used a
232 hardcoded name "origin" to name that remote; it has been corrected
233 to honor the "--origin <name>" option.
235 * "git fetch" into a lazy clone forgot to fetch base objects that are
236 necessary to complete delta in a thin packfile, which has been
237 corrected.
239 * The filter_data used in the list-objects-filter (which manages a
240 lazily sparse clone repository) did not use the dynamic array API
241 correctly---'nr' is supposed to point at one past the last element
242 of the array in use. This has been corrected.
244 * The description about slashes in gitignore patterns (used to
245 indicate things like "anchored to this level only" and "only
246 matches directories") has been revamped.
248 * The URL decoding code has been updated to avoid going past the end
249 of the string while parsing %-<hex>-<hex> sequence.
251 * The list of for-each like macros used by clang-format has been
252 updated.
254 * "git branch --list" learned to show branches that are checked out
255 in other worktrees connected to the same repository prefixed with
256 '+', similar to the way the currently checked out branch is shown
257 with '*' in front.
258 (merge 6e9381469e nb/branch-show-other-worktrees-head later to maint).
260 * Code restructuring during 2.20 period broke fetching tags via
261 "import" based transports.
263 * The commit-graph file is now part of the "files that the runtime
264 may keep open file descriptors on, all of which would need to be
265 closed when done with the object store", and the file descriptor to
266 an existing commit-graph file now is closed before "gc" finalizes a
267 new instance to replace it.
269 * "git checkout -p" needs to selectively apply a patch in reverse,
270 which did not work well.
272 * Code clean-up to avoid signed integer wraparounds during binary search.
274 * "git interpret-trailers" always treated '#' as the comment
275 character, regardless of core.commentChar setting, which has been
276 corrected.
278 * "git stash show 23" used to work, but no more after getting
279 rewritten in C; this regression has been corrected.
281 * "git rebase --abort" used to leave refs/rewritten/ when concluding
282 "git rebase -r", which has been corrected.
284 * An incorrect list of options was cached after command line
285 completion failed (e.g. trying to complete a command that requires
286 a repository outside one), which has been corrected.
288 * The code to parse scaled numbers out of configuration files has
289 been made more robust and also easier to follow.
291 * The codepath to compute delta islands used to spew progress output
292 without giving the callers any way to squelch it, which has been
293 fixed.
295 * Protocol capabilities that go over wire should never be translated,
296 but it was incorrectly marked for translation, which has been
297 corrected. The output of protocol capabilities for debugging has
298 been tweaked a bit.
300 * Use "Erase in Line" CSI sequence that is already used in the editor
301 support to clear cruft in the progress output.
303 * "git submodule foreach" did not protect command line options passed
304 to the command to be run in each submodule correctly, when the
305 "--recursive" option was in use.
307 * The configuration variable rebase.rescheduleFailedExec should be
308 effective only while running an interactive rebase and should not
309 affect anything when running an non-interactive one, which was not
310 the case. This has been corrected.
312 * The "git clone" documentation refers to command line options in its
313 description in the short form; they have been replaced with long
314 forms to make them more recognisable.
316 * Generation of pack bitmaps are now disabled when .keep files exist,
317 as these are mutually exclusive features.
318 (merge 7328482253 ew/repack-with-bitmaps-by-default later to maint).
320 * "git rm" to resolve a conflicted path leaked an internal message
321 "needs merge" before actually removing the path, which was
322 confusing. This has been corrected.
324 * "git stash --keep-index" did not work correctly on paths that have
325 been removed, which has been fixed.
326 (merge b932f6a5e8 tg/stash-keep-index-with-removed-paths later to maint).
328 * Window 7 update ;-)
330 * A codepath that reads from GPG for signed object verification read
331 past the end of allocated buffer, which has been fixed.
333 * "git clean" silently skipped a path when it cannot lstat() it; now
334 it gives a warning.
336 * "git push --atomic" that goes over the transport-helper (namely,
337 the smart http transport) failed to prevent refs to be pushed when
338 it can locally tell that one of the ref update will fail without
339 having to consult the other end, which has been corrected.
341 * The internal diff machinery can be made to read out of bounds while
342 looking for --funcion-context line in a corner case, which has been
343 corrected.
344 (merge b777f3fd61 jk/xdiff-clamp-funcname-context-index later to maint).
346 * Other code cleanup, docfix, build fix, etc.
347 (merge fbec05c210 cc/test-oidmap later to maint).
348 (merge 7a06fb038c jk/no-system-includes-in-dot-c later to maint).
349 (merge 81ed2b405c cb/xdiff-no-system-includes-in-dot-c later to maint).