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1Git v2.52 Release Notes
2=======================
3
4UI, Workflows & Features
5------------------------
6
7 * The "list" subcommand of "git refs" acts as a front-end for
8 "git for-each-ref".
9
10 * "git cmd --help-all" now works outside repositories.
11
12 * "git diff-tree" learned "--max-depth" option.
13
14 * A new subcommand "git repo" gives users a way to grab various
15 repository characteristics.
16
17 * A new command "git last-modified" has been added to show the closest
18 ancestor commit that touched each path.
19
20 * "git refs exists" that works like "git show-ref --exists" has been
21 added.
22
23 * "repo info" learns a short-hand option "-z" that is the same as
24 "--format=nul", and learns to report the objects format used in the
25 repository.
26
27 * "core.commentChar=auto" that attempts to dynamically pick a
28 suitable comment character is non-workable, as it is too much
29 trouble to support for little benefit, and is marked as deprecated.
30
31 * "git send-email" learned to drive "git imap-send" to store already
32 sent e-mails in an IMAP folder.
33
34 * The "promisor-remote" capability mechanism has been updated to
35 allow the "partialCloneFilter" settings and the "token" value to be
36 communicated from the server side.
37
38 * Declare that "git init" that is not otherwise configured uses
39 'main' as the initial branch, not 'master', starting Git 3.0.
40
41 * Keep giving hint about the default initial branch name for users
42 who may be surprised after Git 3.0 switch-over.
43
44 * The stash.index configuration variable can be set to make "git stash
45 pop/apply" pretend that it was invoked with "--index".
46
47 * "git fast-import" learned that "--signed-commits=<how>" option that
48 corresponds to that of "git fast-export".
49
50 * Marking a hunk 'selected' in "git add -p" and then splitting made
51 all the split pieces 'selected'; this has been changed to make them
52 all 'undecided', which gives better end-user experience.
53
54 * Configuration variables that take a pathname as a value
55 (e.g. blame.ignorerevsfile) can be marked as optional by prefixing
56 ":(optoinal)" before its value.
57
58 * Show 'P'ipe command in "git add -p".
59
60 * "git sparse-checkout" subcommand learned a new "clean" action to
61 prune otherwise unused working-tree files that are outside the
62 areas of interest.
63
64 * "git fast-import" is taught to handle signed tags, just like it
65 recently learned to handle signed commits, in different ways.
66
67
68Performance, Internal Implementation, Development Support etc.
69--------------------------------------------------------------
70
71 * string_list_split*() family of functions have been extended to
72 simplify common use cases.
73
74 * Arrays of strbuf is often a wrong data structure to use, and
75 strbuf_split*() family of functions that create them often have
76 better alternatives. Update several code paths and replace
77 strbuf_split*().
78
79 * Revision traversal limited with pathspec, like "git log dir/*",
80 used to ignore changed-paths Bloom filter when the pathspec
81 contained wildcards; now they take advantage of the filter when
82 they can.
83
84 * Doc lint updates to encourage the newer and easier-to-use
85 `synopsis` format, with fixes to a handful of existing uses.
86
87 * Remove dependency on the_repository and other globals from the
88 commit-graph code, and other changes unrelated to de-globaling.
89
90 * Discord has been added to the first contribution documentation as
91 another way to ask for help.
92
93 * Inspired by Ezekiel's recent effort to showcase Rust interface, the
94 hash function implementation used to hash lines have been updated
95 to the one used for ELF symbol lookup by Glibc.
96
97 * Instead of scanning for the remaining items to see if there are
98 still commits to be explored in the queue, use khash to remember
99 which items are still on the queue (an unacceptable alternative is
100 to reserve one object flag bits).
101
102 * The bulk-checkin code used to depend on a file-scope static
103 singleton variable, which has been updated to pass an instance
104 throughout the callchain.
105
106 * The work to build on the bulk-checkin infrastructure to create many
107 objects at once in a transaction and to abstract it into the
108 generic object layer continues.
109
110 * CodingGuidelines now spells out how bitfields are to be written.
111
112 * Adjust to the way newer versions of cURL selectively enable tracing
113 options, so that our tests can continue to work.
114
115 * The clear_alloc_state() API function was not fully clearing the
116 structure for reuse, but since nobody reuses it, replace it with a
117 variant that frees the structure as well, making the callers simpler.
118
119 * "git range-diff" learned a way to limit the memory consumed by
120 O(N*N) cost matrix.
121
122 * Some places in the code confused a variable that is *not* a boolean
123 to enable color but is an enum that records what the user requested
124 to do about color. A couple of bugs of this sort have been fixed,
125 while the code has been cleaned up to prevent similar bugs in the
126 future.
127
128 * The build procedure based on meson learned a target to only build
129 documentation, similar to "make doc".
130 (merge ff4ec8ded0 ps/meson-build-docs later to maint).
131
132 * Dip our toes a bit to (optionally) use Rust implemented helper
133 called from our C code.
134
135 * Documentation for "git log --pretty" options has been updated
136 to make it easier to translate.
137
138 * Instead of three library archives (one for git, one for reftable,
139 and one for xdiff), roll everything into a single libgit.a archive.
140 This would help later effort to FFI into Rust.
141
142 * The beginning of SHA1-SHA256 interoperability work.
143
144 * Build procedure for a few credential helpers (in contrib/) have
145 been updated.
146
147 * CI improvements to handle the recent Rust integration better.
148
149
150Fixes since v2.51
151-----------------
152
153Unless otherwise noted, all the changes in 2.51.X maintenance track,
154including security updates, are included in this release.
155
156 * During interactive rebase, using 'drop' on a merge commit lead to
157 an error, which was incorrect.
158
159 * "git refs migrate" to migrate the reflog entries from a refs
160 backend to another had a handful of bugs squashed.
161
162 * "git remote rename origin upstream" failed to move origin/HEAD to
163 upstream/HEAD when origin/HEAD is unborn and performed other
164 renames extremely inefficiently, which has been corrected.
165 (merge 16c4fa26b9 ps/remote-rename-fix later to maint).
166
167 * "git describe" has been optimized by using better data structure.
168 (merge 08bb69d70f rs/describe-with-prio-queue later to maint).
169
170 * "git push" had a code path that led to BUG() but it should have
171 been a die(), as it is a response to a usual but invalid end-user
172 action to attempt pushing an object that does not exist.
173
174 * Various bugs about rename handling in "ort" merge strategy have
175 been fixed.
176
177 * "git jump" (in contrib/) fails to parse the diff header correctly
178 when a file has a space in its name, which has been corrected.
179 (merge 621ce9c1c6 gh/git-jump-pathname-with-sp later to maint).
180
181 * "git diff --no-index" run inside a subdirectory under control of a
182 Git repository operated at the top of the working tree and stripped
183 the prefix from the output, and oddballs like "-" (stdin) did not
184 work correctly because of it. Correct the set-up by undoing what
185 the set-up sequence did to cwd and prefix.
186
187 * Various options to "git diff" that makes comparison ignore certain
188 aspects of the differences (like "space changes are ignored",
189 "differences in lines that match these regular expressions are
190 ignored") did not work well with "--name-only" and friends.
191 (merge b55e6d36eb ly/diff-name-only-with-diff-from-content later to maint).
192
193 * The above caused regressions, which has been corrected.
194
195 * Documentation for "git rebase" has been updated.
196 (merge 3f7f2b0359 je/doc-rebase later to maint).
197
198 * The start_delayed_progress() function in the progress eye-candy API
199 did not clear its internal state, making an initial delay value
200 larger than 1 second ineffective, which has been corrected.
201
202 * The compatObjectFormat extension is used to hide an incomplete
203 feature that is not yet usable for any purpose other than
204 developing the feature further. Document it as such to discourage
205 its use by mere mortals.
206
207 * "git log -L..." compared trees of multiple parents with the tree of the
208 merge result in an unnecessarily inefficient way.
209 (merge 0a15bb634c sg/line-log-merge-optim later to maint).
210
211 * Under a race against another process that is repacking the
212 repository, especially a partially cloned one, "git fetch" may
213 mistakenly think some objects we do have are missing, which has
214 been corrected.
215
216 * "git fetch" can clobber a symref that is dangling when the
217 remote-tracking HEAD is set to auto update, which has been
218 corrected.
219
220 * "git describe <blob>" misbehaves and/or crashes in some corner
221 cases, which has been taught to exit with failure gracefully.
222 (merge 7c10e48e81 jk/describe-blob later to maint).
223
224 * Manual page for "gitk" is updated with the current maintainer's
225 name.
226
227 * Update the instructions for using GGG in the MyFirstContribution
228 document to say that a GitHub PR could be made against `git/git`
229 instead of `gitgitgadget/git`.
230
231 * Makefile tried to run multiple "cargo build" which would not work
232 very well; serialize their execution to work around this problem.
233
234 * "git repack --path-walk" lost objects in some corner cases, which
235 has been corrected.
236
237 * "git ls-files <pathspec>..." should not necessarily have to expand
238 the index fully if a sparsified directory is excluded by the
239 pathspec; the code is taught to expand the index on demand to avoid
240 this.
241 (merge 681f26bccc ds/ls-files-lazy-unsparse later to maint).
242
243 * Windows "real-time monitoring" interferes with the execution of
244 tests and affects negatively in both correctness and performance,
245 which has been disabled in Gitlab CI.
246
247 * A broken or malicious "git fetch" can say that it has the same
248 object for many many times, and the upload-pack serving it can
249 exhaust memory storing them redundantly, which has been corrected.
250
251 * A corner case bug in "git log -L..." has been corrected.
252
253 * "git rev-parse --short" and friends failed to disambiguate two
254 objects with object names that share common prefix longer than 32
255 characters, which has been fixed.
256 (merge 8655908b9e jc/longer-disambiguation-fix later to maint).
257
258 * Some among "git add -p" and friends ignored color.diff and/or
259 color.ui configuration variables, which is an old regression, which
260 has been corrected.
261
262 * "git subtree" (in contrib/) did not work correctly when splitting
263 squashed subtrees, which has been improved.
264
265 * Import a newer version of the clar unit testing framework.
266 (merge 93dbb6b3c5 ps/clar-updates later to maint).
267
268 * "git send-email --compose --reply-to=<address>" used to add
269 duplicated Reply-To: header, which made mailservers unhappy. This
270 has been corrected.
271 (merge f448f65719 nb/send-email-no-dup-reply-to later to maint).
272
273 * "git rebase -i" failed to clean-up the commit log message when the
274 command commits the final one in a chain of "fixup" commands, which
275 has been corrected.
276
277 * There are double frees and leaks around setup_revisions() API used
278 in "git stash show", which has been fixed, and setup_revisions()
279 API gained a wrapper to make it more ergonomic when using it with
280 strvec-manged argc/argv pairs.
281 (merge a04bc71725 jk/setup-revisions-freefix later to maint).
282
283 * Deal more gracefully with directory / file conflicts when the files
284 backend is used for ref storage, by failing only the ones that are
285 involved in the conflict while allowing others.
286
287 * "git last-modified" operating in non-recursive mode used to trigger
288 a BUG(), which has been corrected.
289
290 * The use of "git config get" command to learn how ANSI color
291 sequence is for a particular type, e.g., "git config get
292 --type=color --default=reset no.such.thing", isn't very ergonomic.
293 (merge e4dabf4fd6 ps/config-get-color-fixes later to maint).
294
295 * The "do you still use it?" message given by a command that is
296 deeply deprecated and allow us to suggest alternatives has been
297 updated.
298
299 * Clang-format update to let our control macros be formatted the way we
300 had them traditionally, e.g., "for_each_string_list_item()" without
301 space before the parentheses.
302
303 * A few places where a size_t value was cast to curl_off_t without
304 checking has been updated to use the existing helper function.
305
306 * "git reflog write" did not honor the configured user.name/email
307 which has been corrected.
308
309 * Handling of an empty subdirectory of .git/refs/ in the ref-files
310 backend has been corrected.
311
312 * Our CI script requires "sudo" that can be told to preserve
313 environment, but Ubuntu replaced with "sudo" with an implementation
314 that lacks the feature. Work this around by reinstalling the
315 original version.
316
317 * The reftable backend learned to sanity check its on-disk data more
318 carefully.
319 (merge 466a3a1afd kn/reftable-consistency-checks later to maint).
320
321 * A lot of code clean-up of xdiff.
322 Split out of a larger topic.
323 (merge 8b9c5d2e3a en/xdiff-cleanup later to maint).
324
325 * "git format-patch --range-diff=... --notes=..." did not drive the
326 underlying range-diff with correct --notes parameter, ending up
327 comparing with different set of notes from its main patch output
328 you would get from "git format-patch --notes=..." for a singleton
329 patch.
330
331 * The code in "git add -p" and friends to iterate over hunks was
332 riddled with bugs, which has been corrected.
333
334 * A few more things that patch authors can do to help maintainer to
335 keep track of their topics better.
336 (merge 1a41698841 tb/doc-submitting-patches later to maint).
337
338 * An earlier addition to "git diff --no-index A B" to limit the
339 output with pathspec after the two directories misbehaved when
340 these directories were given with a trailing slash, which has been
341 corrected.
342
343 * The "--short" option of "git status" that meant output for humans
344 and "-z" option to show NUL delimited output format did not mix
345 well, and colored some but not all things. The command has been
346 updated to color all elements consistently in such a case.
347
348 * Unicode width table update.
349
350 * GPG signing test set-up has been broken for a year, which has been
351 corrected.
352 (merge 516bf45749 jc/t1016-setup-fix later to maint).
353
354 * Recent OpenSSH creates the Unix domain socket to communicate with
355 ssh-agent under $HOME instead of /tmp, which causes our test to
356 fail doe to overly long pathname in our test environment, which has
357 been worked around by using "ssh-agent -T".
358
359 * Other code cleanup, docfix, build fix, etc.
360 (merge 529a60a885 ua/t1517-short-help-tests later to maint).
361 (merge 22d421fed9 ac/deglobal-fmt-merge-log-config later to maint).
362 (merge a60203a015 dk/t7005-editor-updates later to maint).
363 (merge 16684b6fae ps/reftable-libgit2-cleanup later to maint).
364 (merge e5c27bd3d8 je/doc-add later to maint).
365 (merge 13296ac909 ps/object-store-midx-dedup-info later to maint).
366 (merge f9a6705d9a tc/t0450-harden later to maint).
367 (merge a66fc22bf9 rs/get-oid-with-flags-cleanup later to maint).
368 (merge 15b8abde07 js/mingw-includes-cleanup later to maint).
369 (merge 2cebca0582 tb/cat-file-objectmode-update later to maint).