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1Git v2.38 Release Notes
2=======================
3
4UI, Workflows & Features
5
6 * "git remote show [-n] frotz" now pays attention to negative
7 pathspec.
8
9 * "git push" sometimes performs poorly when reachability bitmaps are
10 used, even in a repository where other operations are helped by
11 bitmaps. The push.useBitmaps configuration variable is introduced
12 to allow disabling use of reachability bitmaps only for "git push".
13
14 * "git grep -m<max-hits>" is a way to limit the hits shown per file.
15
16 * "git merge-tree" learned a new mode where it takes two commits and
17 computes a tree that would result in the merge commit, if the
18 histories leading to these two commits were to be merged.
19
20 * "git mv A B" in a sparsely populated working tree can be asked to
21 move a path between directories that are "in cone" (i.e. expected
22 to be materialized in the working tree) and "out of cone"
23 (i.e. expected to be hidden). The handling of such cases has been
24 improved.
25
26 * Earlier, HTTP transport clients learned to tell the server side
27 what locale they are in by sending Accept-Language HTTP header, but
28 this was done only for some requests but not others.
29
30 * Introduce a safe.barerepository configuration variable that
31 allows users to forbid discovery of bare repositories.
32
33 * Various messages that come from the pack-bitmap codepaths have been
34 tweaked.
35
36 * "git rebase -i" learns to update branches whose tip appear in the
37 rebased range with "--update-refs" option.
38
39 * "git ls-files" learns the "--format" option to tweak its output.
40
41 * "git cat-file" learned an option to use the mailmap when showing
42 commit and tag objects.
43
44 * When "git merge" finds that it cannot perform a merge, it should
45 restore the working tree to the state before the command was
46 initiated, but in some corner cases it didn't.
47
48 * Operating modes like "--batch" of "git cat-file" command learned to
49 take NUL-terminated input, instead of one-item-per-line.
50
51 * "git rm" has become more aware of the sparse-index feature.
52
53 * "git rev-list --disk-usage" learned to take an optional value
54 "human" to show the reported value in human-readable format, like
55 "3.40MiB".
56
57 * The "diagnose" feature to create a zip archive for diagnostic
58 material has been lifted from "scalar" and made into a feature of
59 "git bugreport".
60
61 * The namespaces used by "log --decorate" from "refs/" hierarchy by
62 default has been tightened.
63
64 * "git rev-list --ancestry-path=C A..B" is a natural extension of
65 "git rev-list A..B"; instead of choosing a subset of A..B to those
66 that have ancestry relationship with A, it lets a subset with
67 ancestry relationship with C.
68
69 * "scalar" now enables built-in fsmonitor on enlisted repositories,
70 when able.
71
72 * The bash prompt (in contrib/) learned to optionally indicate when
73 the index is unmerged.
74
75 * "git clone" command learned the "--bundle-uri" option to coordinate
76 with hosting sites the use of pre-prepared bundle files.
77
78 * "git range-diff" learned to honor pathspec argument if given.
79
80 * "git format-patch --from=<ident>" can be told to add an in-body
81 "From:" line even for commits that are authored by the given
82 <ident> with "--force-in-body-from" option.
83
84 * The built-in fsmonitor refuses to work on a network mounted
85 repositories; a configuration knob for users to override this has
86 been introduced.
87
88 * The "scalar" addition from Microsoft is now part of the core Git
89 installation.
90
91
92Performance, Internal Implementation, Development Support etc.
93
94 * Collection of what is referenced by objects in promisor packs have
95 been optimized to inspect these objects in the in-pack order.
96
97 * Introduce a helper to see if a branch is already being worked on
98 (hence should not be newly checked out in a working tree), which
99 performs much better than the existing find_shared_symref() to
100 replace many uses of the latter.
101
102 * Teach "git archive" to (optionally and then by default) avoid
103 spawning an external "gzip" process when creating ".tar.gz" (and
104 ".tgz") archives.
105
106 * Allow large objects read from a packstream to be streamed into a
107 loose object file straight, without having to keep it in-core as a
108 whole.
109
110 * Further preparation to turn git-submodule.sh into a builtin
111 continues.
112
113 * Apply Coccinelle rule to turn raw memmove() into MOVE_ARRAY() cpp
114 macro, which would improve maintainability and readability.
115
116 * Teach "make all" to build gitweb as well.
117
118 * Tweak tests so that they still work when the "git init" template
119 did not create .git/info directory.
120
121 * Add Coccinelle rules to detect the pattern of initializing and then
122 finalizing a structure without using it in between at all, which
123 happens after code restructuring and the compilers fail to
124 recognize as an unused variable.
125
126 * The code to convert between GPG trust level strings and internal
127 constants we use to represent them have been cleaned up.
128
129 * Support for libnettle as SHA256 implementation has been added.
130
131 * The way "git multi-pack" uses parse-options API has been improved.
132
133 * A Coccinelle rule (in contrib/) to encourage use of COPY_ARRAY
134 macro has been improved.
135
136 * API tweak to make it easier to run fuzz testing on commit-graph parser.
137
138 * Omit fsync-related trace2 entries when their values are all zero.
139
140 * The codepath to write multi-pack index has been taught to release a
141 large chunk of memory that holds an array of objects in the packs,
142 as soon as it is done with the array, to reduce memory consumption.
143
144 * Add a level of redirection to array allocation API in xdiff part,
145 to make it easier to share with the libgit2 project.
146
147 * "git fetch" client logs the partial clone filter used in the trace2
148 output.
149
150 * The "bundle URI" design gets documented.
151
152 * The common ancestor negotiation exchange during a "git fetch"
153 session now leaves trace log.
154
155 * Test portability improvements.
156 (merge 4d1d843be7 mt/rot13-in-c later to maint).
157
158 * The "subcommand" mode is introduced to parse-options API and update
159 the command line parser of Git commands with subcommands.
160
161 * The pack bitmap file gained a bitmap-lookup table to speed up
162 locating the necessary bitmap for a given commit.
163
164 * The assembly version of SHA-1 implementation for PPC has been
165 removed.
166
167 * The server side that responds to "git fetch" and "git clone"
168 request has been optimized by allowing it to send objects in its
169 object store without recomputing and validating the object names.
170
171 * Annotate function parameters that are not used (but cannot be
172 removed for structural reasons), to prepare us to later compile
173 with -Wunused warning turned on.
174
175 * Share the text used to explain configuration variables used by "git
176 <subcmd>" in "git help <subcmd>" with the text from "git help config".
177
178 * "git mv A B" in a sparsely populated working tree can be asked to
179 move a path from a directory that is "in cone" to another directory
180 that is "out of cone". Handling of such a case has been improved.
181
182 * The chainlint script for our tests has been revamped.
183
184
185Fixes since v2.37
186-----------------
187
188 * Rewrite of "git add -i" in C that appeared in Git 2.25 didn't
189 correctly record a removed file to the index, which was fixed.
190
191 * Certain diff options are currently ignored when combined-diff is
192 shown; mark them as incompatible with the feature.
193
194 * Adjust technical/bitmap-format to be formatted by AsciiDoc, and
195 add some missing information to the documentation.
196
197 * Fixes for tests when the source directory has unusual characters in
198 its path, e.g. whitespaces, double-quotes, etc.
199
200 * "git mktree --missing" lazily fetched objects that are missing from
201 the local object store, which was totally unnecessary for the purpose
202 of creating the tree object(s) from its input.
203
204 * Give _() markings to fatal/warning/usage: labels that are shown in
205 front of these messages.
206
207 * References to commands-to-be-typed-literally in "git rebase"
208 documentation mark-up have been corrected.
209
210 * In a non-bare repository, the behavior of Git when the
211 core.worktree configuration variable points at a directory that has
212 a repository as its subdirectory, regressed in Git 2.27 days.
213
214 * Recent update to vimdiff layout code has been made more robust
215 against different end-user vim settings.
216
217 * Plug various memory leaks, both in the main code and in test-tool
218 commands.
219
220 * Fixes a long-standing corner case bug around directory renames in
221 the merge-ort strategy.
222
223 * The resolve-undo information in the index was not protected against
224 GC, which has been corrected.
225
226 * A corner case bug where lazily fetching objects from a promisor
227 remote resulted in infinite recursion has been corrected.
228
229 * "git clone" from a repository with some ref whose HEAD is unborn
230 did not set the HEAD in the resulting repository correctly, which
231 has been corrected.
232
233 * An earlier attempt to plug leaks placed a clean-up label to jump to
234 at a bogus place, which as been corrected.
235
236 * Variable quoting fix in the vimdiff driver of "git mergetool"
237
238 * "git shortlog -n" relied on the underlying qsort() to be stable,
239 which shouldn't have. Fixed.
240
241 * A fix for a regression in test framework.
242
243 * mkstemp() emulation on Windows has been improved.
244
245 * Add missing documentation for "include" and "includeIf" features in
246 "git config" file format, which incidentally teaches the command
247 line completion to include them in its offerings.
248
249 * Avoid "white/black-list" in documentation and code comments.
250
251 * Workaround for a compiler warning against use of die() in
252 osx-keychain (in contrib/).
253
254 * Workaround for a false positive compiler warning.
255
256 * "git p4" working on UTF-16 files on Windows did not implement
257 CRLF-to-LF conversion correctly, which has been corrected.
258
259 * "git p4" did not handle non-ASCII client name well, which has been
260 corrected.
261
262 * "rerere-train" script (in contrib/) used to honor commit.gpgSign
263 while recreating the throw-away merges.
264
265 * "git checkout" miscounted the paths it updated, which has been
266 corrected.
267
268 * Fix for a bug that makes write-tree to fail to write out a
269 non-existent index as a tree, introduced in 2.37.
270
271 * There was a bug in the codepath to upgrade generation information
272 in commit-graph from v1 to v2 format, which has been corrected.
273
274 * Gitweb had legacy URL shortener that is specific to the way
275 projects hosted on kernel.org used to (but no longer) work, which
276 has been removed.
277
278 * Fix build procedure for Windows that uses CMake so that it can pick
279 up the shell interpreter from local installation location.
280
281 * Conditionally allow building Python interpreter on Windows
282
283 * Fix to lstat() emulation on Windows.
284
285 * Older gcc with -Wall complains about the universal zero initializer
286 "struct s = { 0 };" idiom, which makes developers' lives
287 inconvenient (as -Werror is enabled by DEVELOPER=YesPlease). The
288 build procedure has been tweaked to help these compilers.
289
290 * Plug memory leaks in the failure code path in the "merge-ort" merge
291 strategy backend.
292
293 * "git symbolic-ref symref non..sen..se" is now diagnosed as an error.
294
295 * A follow-up fix to a fix for a regression in 2.36 around hooks.
296
297 * Avoid repeatedly running getconf to ask libc version in the test
298 suite, and instead just as it once per script.
299
300 * Platform-specific code that determines if a directory is OK to use
301 as a repository has been taught to report more details, especially
302 on Windows.
303
304 * "vimdiff3" regression fix.
305
306 * "git fsck" reads mode from tree objects but canonicalizes the mode
307 before passing it to the logic to check object sanity, which has
308 hid broken tree objects from the checking logic. This has been
309 corrected, but to help existing projects with broken tree objects
310 that they cannot fix retroactively, the severity of anomalies this
311 code detects has been demoted to "info" for now.
312
313 * Fixes to sparse index compatibility work for "reset" and "checkout"
314 commands.
315
316 * An earlier optimization discarded a tree-object buffer that is
317 still in use, which has been corrected.
318
319 * Fix deadlocks between main Git process and subprocess spawned via
320 the pipe_command() API, that can kill "git add -p" that was
321 reimplemented in C recently.
322
323 * The sequencer machinery translated messages left in the reflog by
324 mistake, which has been corrected.
325
326 * xcalloc(), imitating calloc(), takes "number of elements of the
327 array", and "size of a single element", in this order. A call that
328 does not follow this ordering has been corrected.
329
330 * The preload-index codepath made copies of pathspec to give to
331 multiple threads, which were left leaked.
332
333 * Update the version of Ubuntu used for GitHub Actions CI from 18.04
334 to 22.04.
335
336 * The auto-stashed local changes created by "git merge --autostash"
337 was mixed into a conflicted state left in the working tree, which
338 has been corrected.
339
340 * Multi-pack index got corrupted when preferred pack changed from one
341 pack to another in a certain way, which has been corrected.
342 (merge 99e4d084ff tb/midx-with-changing-preferred-pack-fix later to maint).
343
344 * The clean-up of temporary files created via mks_tempfile_dt() was
345 racy and attempted to unlink() the leading directory when signals
346 are involved, which has been corrected.
347 (merge babe2e0559 rs/tempfile-cleanup-race-fix later to maint).
348
349 * FreeBSD portability fix for "git maintenance" that spawns "crontab"
350 to schedule tasks.
351 (merge ee69e7884e bc/gc-crontab-fix later to maint).
352
353 * Those who use diff-so-fancy as the diff-filter noticed a regression
354 or two in the code that parses the diff output in the built-in
355 version of "add -p", which has been corrected.
356 (merge 0a101676e5 js/add-p-diff-parsing-fix later to maint).
357
358 * Segfault fix-up to an earlier fix to the topic to teach "git reset"
359 and "git checkout" work better in a sparse checkout.
360 (merge 037f8ea6d9 vd/sparse-reset-checkout-fixes later to maint).
361
362 * "git diff --no-index A B" managed its the pathnames of its two
363 input files rather haphazardly, sometimes leaking them. The
364 command line argument processing has been straightened out to clean
365 it up.
366 (merge 2b43dd0eb5 rs/diff-no-index-cleanup later to maint).
367
368 * "git rev-list --verify-objects" ought to inspect the contents of
369 objects and notice corrupted ones, but it didn't when the commit
370 graph is in use, which has been corrected.
371 (merge b27ccae34b jk/rev-list-verify-objects-fix later to maint).
372
373 * More fixes to "add -p"
374 (merge 64ec8efb83 js/builtin-add-p-portability-fix later to maint).
375
376 * The parser in the script interface to parse-options in "git
377 rev-parse" has been updated to diagnose a bogus input correctly.
378 (merge f20b9c36d0 ow/rev-parse-parseopt-fix later to maint).
379
380 * The code that manages list-object-filter structure, used in partial
381 clones, leaked the instances, which has been plugged.
382 (merge 66eede4a37 jk/plug-list-object-filter-leaks later to maint).
383
384 * Fix another UI regression in the reimplemented "add -p".
385 (merge f6f0ee247f rs/add-p-worktree-mode-prompt-fix later to maint).
386
387 * "git fetch" over protocol v2 sent an incorrect ref prefix request
388 to the server and made "git pull" with configured fetch refspec
389 that does not cover the remote branch to merge with fail, which has
390 been corrected.
391 (merge 49ca2fba39 jk/proto-v2-ref-prefix-fix later to maint).
392
393 * A result from opendir() was leaking in the commit-graph expiration
394 codepath, which has been plugged.
395 (merge 12f1ae5324 ml/commit-graph-expire-dir-leak-fix later to maint).
396
397 * Just like we have coding guidelines, we now have guidelines for
398 reviewers.
399 (merge e01b851923 vd/doc-reviewing-guidelines later to maint).
400
401 * Other code cleanup, docfix, build fix, etc.
402 (merge 77b9e85c0f vd/fix-perf-tests later to maint).
403 (merge 0682bc43f5 jk/test-crontab-fixes later to maint).
404 (merge b46dd1726c cc/doc-trailer-whitespace-rules later to maint).