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1Git v2.48 Release Notes
2=======================
3
4UI, Workflows & Features
5------------------------
6
7 * A new configuration variable remote.<name>.serverOption makes the
8 transport layer act as if the --serverOption=<value> option is
9 given from the command line.
10
11 * "git rebase --rebase-merges" now uses branch names as labels when
12 able.
13
14 * Describe the policy to introduce breaking changes.
15
16 * Teach 'git notes add' and 'git notes append' a new '-e' flag,
17 instructing them to open the note in $GIT_EDITOR before saving.
18
19 * Documentation for "git bundle" saw improvements to more prominently
20 call out the use of '--all' when creating bundles.
21
22 * Drop support for older libcURL and Perl.
23
24 * End-user experience of "git mergetool" when the command errors out
25 has been improved.
26
27 * "git bundle --unbundle" and "git clone" running on a bundle file
28 both learned to trigger fsck over the new objects with configurable
29 fck check levels.
30
31 * When "git fetch $remote" notices that refs/remotes/$remote/HEAD is
32 missing and discovers what branch the other side points with its
33 HEAD, refs/remotes/$remote/HEAD is updated to point to it.
34
35 * "git fetch" honors "remote.<remote>.followRemoteHEAD" settings to
36 tweak the remote-tracking HEAD in "refs/remotes/<remote>/HEAD".
37
38 * "git range-diff" learned to optionally show and compare merge
39 commits in the ranges being compared, with the --diff-merges
40 option.
41
42
43Performance, Internal Implementation, Development Support etc.
44--------------------------------------------------------------
45
46 * Document "amlog" notes.
47
48 * The way AsciiDoc is used for SYNOPSIS part of the manual pages has
49 been revamped. The sources, at least for the simple cases, got
50 vastly more pleasant to work with.
51
52 * The reftable library is now prepared to expect that the memory
53 allocation function given to it may fail to allocate and to deal
54 with such an error.
55
56 * An extra worktree attached to a repository points at each other to
57 allow finding the repository from the worktree (and vice versa)
58 possible. Use relative paths for this linkage.
59
60 * Enable Windows-based CI in GitLab.
61
62 * Commands that can also work outside Git have learned to take the
63 repository instance "repo" when we know we are in a repository, and
64 NULL when we are not, in a parameter. The uses of the_repository
65 variable in a few of them have been removed using the new calling
66 convention.
67
68 * The reftable sub-system grew a new reftable-specific strbuf
69 replacement to reduce its dependency on Git-specific data
70 structures.
71
72 * The ref-filter machinery learns to recognize and avoid cases where
73 sorting would be redundant.
74
75 * Various platform compatibility fixes split out of the larger effort
76 to use Meson as the primary build tool.
77
78 * Treat ECONNABORTED the same as ECONNRESET in 'git credential-cache'
79 to work around a possible Cygwin regression. This resolves a race
80 condition caused by changes in Cygwin's handling of socket
81 closures, allowing the client to exit cleanly when encountering
82 ECONNABORTED.
83
84 * Demonstrate an assertion failure in 'git mv'.
85
86 * Documentation update to clarify that 'uploadpack.allowAnySHA1InWant'
87 implies both 'allowTipSHA1InWant' and 'allowReachableSHA1InWant'.
88
89 * Replace various calls to atoi() with strtol_i() and strtoul_ui(),
90 and add improved error handling.
91
92 * Documentation updates to 'git-update-ref(1)'.
93
94 * Update the project's CodingGuidelines to discourage naming functions
95 with a "_1()" suffix.
96
97 * Update '.clang-format' to match project conventions.
98
99 * Centralize documentation for repository extensions into a single place.
100
101 * Buildfix and upgrade of Clar to a newer version.
102
103 * Documentation mark-up updates.
104
105 * Renaming a handful of variables and structure fields.
106
107 * Fix for clar unit tests to support CMake build.
108
109 * C23 compatibility updates.
110
111 * GCC 15 compatibility updates.
112
113 * We now ensure "index-pack" is used with the "--promisor" option
114 only during a "git fetch".
115
116 * The migration procedure between two ref backends has been optimized.
117
118 * "git fsck" learned to issue warnings on "curiously formatted" ref
119 contents that have always been treated as valid but that Git
120 wouldn't have written itself (e.g., missing terminating end-of-line
121 after the full object name).
122
123 * Work around Coverity warning that would not trigger in practice.
124
125 * Built-in Git subcommands are supplied the repository object to work
126 with; they learned to do the same when they invoke sub-subcommands.
127
128 * Drop support for ancient environments in various CI jobs.
129
130 * Isolate the reftable subsystem from the rest of Git's codebase by
131 using fewer pieces of Git's infrastructure.
132
133 * Optimize reading random references out of the reftable backend by
134 allowing reuse of iterator objects.
135
136 * Backport oss-fuzz tests to our codebase.
137
138 * Introduce a new repository extension to prevent older Git versions
139 from mis-interpreting worktrees created with relative paths.
140
141 * Yet another "pass the repository through the callchain" topic.
142
143 * "git describe" learned to stop digging the history needlessly
144 deeper.
145
146 * Build procedure update plus introduction of Meson based builds.
147
148 * Recent reftable updates mistook a NULL return from a request for
149 0-byte allocation as OOM and died unnecessarily, which has been
150 corrected.
151
152 * Reftable backend adds check for upper limit of log's update_index.
153
154 * Start working to make the codebase buildable with -Wsign-compare.
155
156 * Regression fix for 'show-index' when run outside of a repository.
157
158 * The meson-build procedure is integrated into CI to catch and
159 prevent bitrotting.
160
161 * "git refs migrate" learned to also migrate the reflog data across
162 backends.
163
164 * The developer documentation has been updated to give the latest
165 info on gitk and git-gui maintainer.
166
167
168 * CI jobs that run threaded programs under LSan has been giving false
169 positives from time to time, which has been worked around.
170
171
172Fixes since v2.47
173-----------------
174
175 * Doc update to clarify how periodical maintenance are scheduled,
176 spread across time to avoid thundering herds.
177
178 * Use after free and double freeing at the end in "git log -L... -p"
179 had been identified and fixed.
180
181 * On macOS, fsmonitor can fall into a race condition that results in
182 a client waiting forever to be notified about an event that has
183 already happened. This problem has been corrected.
184
185 * "git maintenance start" crashed due to an uninitialized variable
186 reference, which has been corrected.
187
188 * Fail gracefully instead of crashing when attempting to write the
189 contents of a corrupt in-core index as a tree object.
190
191 * A "git fetch" from the superproject going down to a submodule used
192 a wrong remote when the default remote names are set differently
193 between them.
194
195 * Fixes compile time warnings with 64-bit MSVC.
196
197 * Teaches 'shortlog' to explicitly use SHA-1 when operating outside
198 of a repository.
199
200 * Fix 'git grep' regression on macOS by disabling lookahead when
201 encountering invalid UTF-8 byte sequences.
202
203 * The dumb-http code regressed when the result of re-indexing a pack
204 yielded an *.idx file that differs in content from the *.idx file
205 it downloaded from the remote. This has been corrected by no longer
206 relying on the *.idx file we got from the remote.
207
208 * When called with '--left-right' and '--use-bitmap-index', 'rev-list'
209 will produce output without any left/right markers, which has been
210 corrected.
211
212 * More leakfixes.
213
214 * Test modernization.
215
216 * The "--shallow-exclude=<ref>" option to various history transfer
217 commands takes a ref, not an arbitrary revision.
218
219 * A regression where commit objects missing from a commit-graph can
220 cause an infinite loop when doing a fetch in a partial clone has
221 been fixed.
222
223 * The MinGW compatibility layer has been taught to support POSIX
224 semantics for atomic renames when other process(es) have a file
225 opened at the destination path.
226
227 * "git gc" discards any objects that are outside promisor packs that
228 are referred to by an object in a promisor pack, and we do not
229 refetch them from the promisor at runtime, resulting an unusable
230 repository. Work around it by including these objects in the
231 referring promisor pack at the receiving end of the fetch.
232
233 * Avoid build/test breakage on a system without working malloc debug
234 support dynamic library.
235 (merge 72ad6dc368 jk/test-malloc-debug-check later to maint).
236
237 * Double-free fix.
238 (merge fe17a25905 jk/fetch-prefetch-double-free-fix later to maint).
239
240 * Use of some uninitialized variables in "git difftool" has been
241 corrected.
242
243 * Object reuse code based on multi-pack-index sent an unwanted copy
244 of object.
245 (merge e199290592 tb/multi-pack-reuse-dupfix later to maint).
246
247 * "git fast-import" can be tricked into a replace ref that maps an
248 object to itself, which is a useless thing to do.
249 (merge 5e904f1a4a en/fast-import-avoid-self-replace later to maint).
250
251 * The ref-transaction hook triggered for reflog updates, which has
252 been corrected.
253 (merge b886db48c6 kn/ref-transaction-hook-with-reflog later to maint).
254
255 * Give a bit of advice/hint message when "git maintenance" stops finding a
256 lock file left by another instance that still is potentially running.
257 (merge ba874d1dac ps/gc-stale-lock-warning later to maint).
258
259 * Use the right helper program to measure file size in performance tests.
260 (merge 3f97f1bce6 tb/use-test-file-size-more later to maint).
261
262 * A double-free that may not trigger in practice by luck has been
263 corrected in the reference resolution code.
264 (merge b6318cf23a sj/refs-symref-referent-fix later to maint).
265
266 * The sequencer failed to honor core.commentString in some places.
267
268 * Describe a case where an option value needs to be spelled as a
269 separate argument, i.e. "--opt val", not "--opt=val".
270 (merge 1bc1e94091 jc/doc-opt-tilde-expand later to maint).
271
272 * Loosen overly strict ownership check introduced in the recent past,
273 to keep the promise "cloning a suspicious repository is a safe
274 first step to inspect it".
275 (merge 0ffb5a6bf1 bc/allow-upload-pack-from-other-people later to maint).
276
277 * "git fast-import" learned to reject paths with ".." and "." as
278 their components to avoid creating invalid tree objects.
279 (merge 8cb4c6e62f en/fast-import-verify-path later to maint).
280
281 * The --ancestry-path option is designed to be given a commit that is
282 on the path, which was not documented, which has been corrected.
283 (merge bc1a980759 kk/doc-ancestry-path later to maint).
284
285 * "git tag" has been taught to refuse to create refs/tags/HEAD
286 since such a tag will be confusing in the context of the UI provided by
287 the Git Porcelain commands.
288 (merge bbd445d5ef jc/forbid-head-as-tagname later to maint).
289
290 * The advice messages now tell the newer 'git config set' command to
291 set the advice.token configuration variable to squelch a message.
292 (merge 6c397d0104 bf/explicit-config-set-in-advice-messages later to maint).
293
294 * The syntax ":/<text>" to name the latest commit with the matching
295 text was broken with a recent change, which has been corrected.
296 (merge 0ff919e87a ps/commit-with-message-syntax-fix later to maint).
297
298 * Fix performance regression of a recent "fatten promisor pack with
299 local objects" protection against an unwanted gc.
300
301 * "git log -p --remerge-diff --reverse" was completely broken.
302 (merge f94bfa1516 js/log-remerge-keep-ancestry later to maint).
303
304 * "git bundle create" with an annotated tag on the positive end of
305 the revision range had a workaround code for older limitation in
306 the revision walker, which has become unnecessary.
307 (merge dd1072dfa8 tc/bundle-with-tag-remove-workaround later to maint).
308
309 * GitLab CI updates.
310 (merge c6b43f663e ps/ci-gitlab-update later to maint).
311
312 * Code to reuse objects based on bitmap contents have been tightened
313 to avoid race condition even when multiple packs are involved.
314 (merge 62b3ec8a3f tb/bitmap-fix-pack-reuse later to maint).
315
316 * An earlier "csum-file checksum does not have to be computed with
317 sha1dc" topic had a few code paths that had initialized an
318 implementation of a hash function to be used by an unmatching hash
319 by mistake, which have been corrected.
320 (merge 599a63409b ps/weak-sha1-for-tail-sum-fix later to maint).
321
322 * Other code cleanup, docfix, build fix, etc.
323 (merge 77af53f56f aa/t7300-modernize later to maint).
324 (merge dcd590a39d bf/t-readme-mention-reftable later to maint).
325 (merge 68e3c69efa kh/trailer-in-glossary later to maint).
326 (merge 91f88f76e6 tb/boundary-traversal-fix later to maint).
327 (merge 168ebb7159 jc/doc-error-message-guidelines later to maint).
328 (merge 18693d7d65 kh/doc-bundle-typofix later to maint).
329 (merge e2f5d3b491 kh/doc-update-ref-grammofix later to maint).
330 (merge 8525e92886 mh/doc-windows-home-env later to maint).