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1Git v2.49 Release Notes
2=======================
3
4UI, Workflows & Features
5------------------------
6
7 * Completion script updates for zsh
8
9 * "git pack-objects" and its wrapper "git repack" learned an option
10 to use an alternative path-hash function to improve delta-base
11 selection to produce a packfile with deeper history than window
12 size.
13
14 * "git gc" learned the "--expire-to" option and passes it down to
15 underlying "git repack".
16
17 * "[help] autocorrect = 1" used to be a way to say "please wait for
18 0.1 second after suggesting a typofix of the command name before
19 running that command"; now it means "yes, if there is a plausible
20 typofix for the command name, please run it immediately".
21
22 * "git clone" learned to make a shallow clone for a single commit
23 that is not necessarily be at the tip of any branch.
24
25 * Lazy-loading missing files in a blobless clone on demand is costly
26 as it tends to be one-blob-at-a-time. "git backfill" is introduced
27 to help bulk-download necessary files beforehand.
28
29 * "git push --atomic --porcelain" used to ignore failures from the
30 other side, losing the error status from the child process, which
31 has been corrected.
32
33 * "git rev-list --missing=" learned to accept "print-info" that gives
34 known details expected of the missing objects, like path and type.
35
36 * Comes with an updated "gitk".
37
38 * The documentation of "git commit" and "git rebase" now refer to
39 commit titles as such, not "subject".
40
41 * The value of "uname -s" is by default sent over the wire as a part
42 of the "version" capability.
43
44 * "git refs migrate" can optionally be told not to migrate the reflog.
45
46 * The netrc support (via the cURL library) for the HTTP transport has
47 been re-enabled.
48
49 * Removal of ".git/branches" and ".git/remotes" support in the
50 BreakingChanges document has been further clarified.
51
52 * What happens to submodules during merge has been documented in a
53 bit more detail.
54
55
56Performance, Internal Implementation, Development Support etc.
57--------------------------------------------------------------
58
59 * More -Wsign-compare fixes.
60
61 * meson-based build now supports the unsafe-sha1 build knob.
62
63 * The meson-based build procedure covers contrib/ and other places as
64 well.
65
66 * The code to check LSan results has been simplified and made more
67 robust.
68 (merge 164a2516eb jk/lsan-race-ignore-false-positive later to maint).
69
70 * More code paths have a repository passed through the callchain,
71 instead of assuming the primary the_repository object.
72
73 * Move a few more unit tests to the clar test framework.
74
75 * Introduce a new API to visit objects in batches based on a common
76 path, or by type.
77
78 * Following the procedure we established to introduce breaking
79 changes for Git 3.0, allow an early opt-in for removing support of
80 $GIT_DIR/branches/ and $GIT_DIR/remotes/ directories to configure
81 remotes.
82
83 * The code paths to interact with zlib has been cleaned up in
84 preparation for building with zlib-ng.
85
86 * Foreign language interface for Rust into our code base has been added.
87
88 * All the documentation .txt files have been renamed to .adoc to help
89 content aware editors.
90
91 * "git difftool" code clean-up.
92
93 * Rename processing in the recursive merge backend has seen a micro
94 optimization.
95
96 * The path.[ch] API takes an explicit repository parameter passed
97 throughout the callchain, instead of relying on the_repository
98 singleton instance.
99
100 * Large-object promisor protocol extension has been introduced.
101
102 * The editorconfig file is updated to tell us that bash scripts are
103 similar to general Bourne shell scripts.
104
105 * Meson-based build procedure forgot to build some docs, which has
106 been corrected.
107
108
109Fixes since v2.48
110-----------------
111
112 * "git submodule" learned various ways to spell the same option,
113 e.g. "--branch=B" can be spelled "--branch B" or "-bB".
114 (merge b86f0f9071 re/submodule-parse-opt later to maint).
115
116 * Tweak the help text used for the option value placeholders by
117 parse-options API so that translations can customize the "<>"
118 placeholder signal (e.g. "--option=<value>").
119 (merge 5b34dd08d0 as/long-option-help-i18n later to maint).
120
121 * CI jobs gave sporadic failures, which turns out that that the
122 object finalization code was giving an error when it did not have
123 to.
124 (merge d7fcbe2c56 ps/object-collision-check later to maint).
125
126 * The code to compute "unique" name used git_rand() which can fail or
127 get stuck; the callsite does not require cryptographic security.
128 Introduce the "insecure" mode and use it appropriately.
129 (merge 0b4f8afef6 ps/reftable-get-random-fix later to maint).
130
131 * A misconfigured "fsck.skiplist" configuration variable was not
132 diagnosed as an error, which has been corrected.
133 (merge ca7158076f jt/fsck-skiplist-parse-fix later to maint).
134
135 * Extended SHA-1 expression parser did not work well when a branch
136 with an unusual name (e.g. "foo{bar") is involved.
137 (merge 191f0c8db2 en/object-name-with-funny-refname-fix later to maint).
138
139 * The meson build procedure looked for the 'version-def.h' file in a
140 wrong directory, which has been corrected.
141 (merge 4771501c0a tc/meson-use-our-version-def-h later to maint).
142
143 * The meson build procedure for Documentation/technical/ hierarchy was
144 missing necessary dependencies, which has been corrected.
145 (merge 1dca492edd sj/meson-doc-technical-dependency-fix later to maint).
146
147 * The "instaweb" bound only to local IP address without "--local" and
148 to all addresses with "--local", which was the other way around, when
149 using Python's http.server class, which has been corrected.
150 (merge 76baf97fa1 ak/instaweb-python-port-binding-fix later to maint).
151
152 * Document that it is insecure to use Personal Access Tokens, which
153 some hosting providers take as username/password, embedded in URLs.
154 (merge a90ff409f0 mh/doc-credential-helpers-with-pat later to maint).
155
156 * The help text from "git $cmd -h" appear on the standard output for
157 some $cmd and the standard error for others. The built-in commands
158 have been fixed to show them on the standard output consistently.
159 (merge f66d1423f5 jc/show-usage-help later to maint).
160
161 * The meson-driven build is now aware of "git-subtree" housed in
162 contrib/subtree hierarchy.
163 (merge 8454b42f94 ps/build-meson-subtree later to maint).
164
165 * It was possible for "git unpack-objects" and "git index-pack" to
166 make an unaligned access, which has been corrected.
167 (merge 98046591b9 jk/pack-header-parse-alignment-fix later to maint).
168
169 * The "cache" credential back-end did not handle authtype correctly,
170 which has been corrected.
171 (merge 0b43274850 mh/credential-cache-authtype-request-fix later to maint).
172
173 * "git branch --sort=..." and "git for-each-ref --format=... --sort=..."
174 did not work as expected with some atoms, which has been corrected.
175 (merge c5490ce9d1 rs/ref-fitler-used-atoms-value-fix later to maint).
176
177 * reflog entries for symbolic ref updates were broken, which has been
178 corrected.
179 (merge 3519492430 kn/reflog-symref-fix later to maint).
180
181 * The trace2 code was not prepared to show a configuration variable
182 that is set to true using the valueless true syntax, which has been
183 corrected.
184 (merge 2fd367cf63 am/trace2-with-valueless-true later to maint).
185
186 * The "git refs migrate" command did not migrate the reflog for
187 refs/stash, which is the contents of the stashes, which has been
188 corrected.
189 (merge a0bea0978f ps/reflog-migration-with-logall-fix later to maint).
190
191 * Doc and short-help text for "show-index" has been clarified to
192 stress that the command reads its data from the standard input.
193 (merge 49edce4ff9 jc/show-index-h-update later to maint).
194
195 * The API around choosing to use unsafe variant of SHA-1
196 implementation has been updated in an attempt to make it harder to
197 abuse.
198 (merge 04292c3796 tb/unsafe-hash-cleanup later to maint).
199
200 * Fix bugs in an earlier attempt to fix "git refs migration".
201 (merge f11f0a5a2d kn/reflog-migration-fix-fix later to maint).
202
203 * The code path used when "git fetch" fetches from a bundle file
204 closed the same file descriptor twice, which sometimes broke things
205 unexpectedly when the file descriptor was reused, which has been
206 corrected.
207 (merge 9a84794ad8 js/bundle-unbundle-fd-reuse-fix later to maint).
208
209 * "git init" to reinitialize a repository that already exists cannot
210 change the hash function and ref backends; such a request is
211 silently ignored now.
212 (merge 7e88640cd1 ps/setup-reinit-fixes later to maint).
213
214 * "git apply" internally uses unsigned long for line numbers and uses
215 strtoul() to parse numbers on the hunk headers. It however forgot
216 to check parse errors.
217 (merge a206058fda pw/apply-ulong-overflow-check later to maint).
218
219 * Two CI tasks, whitespace check and style check, work on the
220 difference from the base version and the version being checked, but
221 the base was computed incorrectly in GitLab CI in some cases, which
222 has been corrected.
223 (merge acc4fb302b jt/gitlab-ci-base-fix later to maint).
224
225 * "git repack --keep-unreachable" to send unreachable objects to the
226 main pack "git repack -ad" produces did not work when there is no
227 existing packs, which has been corrected.
228 (merge 414c82300a ps/repack-keep-unreachable-in-unpacked-repo later to maint).
229
230 * Going into a secondary worktree and asking "is the main worktree
231 bare?" did not work correctly when per-worktree configuration
232 option was in use, which has been corrected.
233
234 * Fetching into a bare repository incorrectly assumed it always used
235 a mirror layout when deciding to update remote-tracking HEAD, which
236 has been corrected.
237 (merge 93dc16483a bf/fetch-set-head-fix later to maint).
238
239 * A thunderbird helper script lost its bashism.
240 (merge 59d26bd961 bc/contrib-thunderbird-patch-inline-fix later to maint).
241
242 * The -G/-S options to the "diff" family of commands caused us to hit
243 a BUG() when they get no values; they have been corrected.
244 (merge a620046b29 bc/diff-reject-empty-arg-to-pickaxe later to maint).
245
246 * "git merge-tree --stdin" has been improved (including a workaround
247 for a deadlock).
248 (merge 6a9ae81015 pw/merge-tree-stdin-deadlock-fix later to maint).
249
250 * Correct the default target in Documentation/Makefile, and
251 future-proof all Makefiles from similar breakages by declaring the
252 default target (which happens to be "all") upfront.
253 (merge 5309c1e9fb ad/set-default-target-in-makefiles later to maint).
254
255 * "git check-mailmap" used to segfault when queried without human
256 readable name.
257 (merge bb60c52131 jk/check-mailmap-wo-name-fix later to maint).
258
259 * Support for renaming of symbolic links on Windows has been improved.
260
261 * "git rebase -i" failed to allow rewording an empty commit that has
262 been fast-forwarded.
263 (merge af8fc7be10 pw/rebase-i-ff-empty-commit later to maint).
264
265 * The use of "paste" command for aggregating the test results have
266 been corrected.
267 (merge ce98863204 dk/test-aggregate-results-paste-fix later to maint).
268
269 * Other code cleanup, docfix, build fix, etc.
270 (merge ddb5287894 jk/t7407-use-test-grep later to maint).
271 (merge 21e1b44865 aj/difftool-config-doc-fix later to maint).
272 (merge 6a63995335 mh/gitattr-doc-markup-fix later to maint).
273 (merge 43850dcf9c sk/unit-test-hash later to maint).
274 (merge 4ad47d2de3 jc/cli-doc-option-and-config later to maint).
275 (merge 2d0ff147e5 jp/t8002-printf-fix later to maint).
276 (merge 69666e6746 ja/doc-restore-markup-update later to maint).
277 (merge d11d003ba5 sk/strlen-returns-size_t later to maint).
278 (merge 77b2d29e91 ja/doc-notes-markup-updates later to maint).
279 (merge 6979bf6f8f jk/combine-diff-cleanup later to maint).
280 (merge 8705c9bd13 kn/pack-write-with-reduced-globals later to maint).
281 (merge 087740d65a ps/leakfixes-0129 later to maint).
282 (merge 6bba6f604b jp/doc-trailer-config later to maint).
283 (merge f1cc562b77 lo/t7603-path-is-file-update later to maint).
284 (merge 45761988ac en/doc-renormalize later to maint).
285 (merge 832f56f06a jc/doc-boolean-synonyms later to maint).
286 (merge 3eeed876a9 ac/doc-http-ssl-type-config later to maint).
287 (merge c268e3285d jc/breaking-changes-early-adopter-option later to maint).
288 (merge 0d03fda6a5 pb/doc-follow-remote-head later to maint).