doc: MyFirstContribution: fix cmd placement instructions
[git/git.git] / Documentation / RelNotes / 2.23.0.txt
1 Git 2.23 Release Notes
2 ======================
3
4 Updates since v2.22
5 -------------------
6
7 Backward compatibility note
8
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".
12
13 * The "git log" command by default behaves as if the --mailmap option
14 was given.
15
16
17 UI, Workflows & Features
18
19 * The "git fast-export/import" pair has been taught to handle commits
20 with log messages in encoding other than UTF-8 better.
21
22 * In recent versions of Git, per-worktree refs are exposed in
23 refs/worktrees/<wtname>/ hierarchy, which means that worktree names
24 must be a valid refname component. The code now sanitizes the names
25 given to worktrees, to make sure these refs are well-formed.
26
27 * "git merge" learned "--quit" option that cleans up the in-progress
28 merge while leaving the working tree and the index still in a mess.
29
30 * "git format-patch" learns a configuration to set the default for
31 its --notes=<ref> option.
32
33 * The code to show args with potential typo that cannot be
34 interpreted as a commit-ish has been improved.
35
36 * "git clone --recurse-submodules" learned to set up the submodules
37 to ignore commit object names recorded in the superproject gitlink
38 and instead use the commits that happen to be at the tip of the
39 remote-tracking branches from the get-go, by passing the new
40 "--remote-submodules" option.
41
42 * The pattern "git diff/grep" use to extract funcname and words
43 boundary for Matlab has been extend to cover Octave, which is more
44 or less equivalent.
45
46 * "git help git" was hard to discover (well, at least for some
47 people).
48
49 * The pattern "git diff/grep" use to extract funcname and words
50 boundary for Rust has been added.
51
52 * "git status" can be told a non-standard default value for the
53 "--[no-]ahead-behind" option with a new configuration variable
54 status.aheadBehind.
55
56 * "git fetch" and "git pull" reports when a fetch results in
57 non-fast-forward updates to let the user notice unusual situation.
58 The commands learned "--no-show-forced-updates" option to disable
59 this safety feature.
60
61 * Two new commands "git switch" and "git restore" are introduced to
62 split "checking out a branch to work on advancing its history" and
63 "checking out paths out of the index and/or a tree-ish to work on
64 advancing the current history" out of the single "git checkout"
65 command.
66
67 * "git branch --list" learned to always output the detached HEAD as
68 the first item (when the HEAD is detached, of course), regardless
69 of the locale.
70
71 * The conditional inclusion mechanism learned to base the choice on
72 the branch the HEAD currently is on.
73
74 * "git rev-list --objects" learned the "--no-object-names" option to
75 squelch the path to the object that is used as a grouping hint for
76 pack-objects.
77
78 * A new tag.gpgSign configuration variable turns "git tag -a" into
79 "git tag -s".
80
81 * "git multi-pack-index" learned expire and repack subcommands.
82
83 * "git blame" learned to "ignore" commits in the history, whose
84 effects (as well as their presence) get ignored.
85
86 * "git cherry-pick/revert" learned a new "--skip" action.
87
88 * The tips of refs from the alternate object store can be used as
89 starting point for reachability computation now.
90
91 * Extra blank lines in "git status" output have been reduced.
92
93 * The commits in a repository can be described by multiple
94 commit-graph files now, which allows the commit-graph files to be
95 updated incrementally.
96
97 * "git range-diff" output has been tweaked for easier identification
98 of which part of what file the patch shown is about.
99
100
101 Performance, Internal Implementation, Development Support etc.
102
103 * Update supporting parts of "git rebase" to remove code that should
104 no longer be used.
105
106 * Developer support to emulate unsatisfied prerequisites in tests to
107 ensure that the remainder of the tests still succeeds when tests
108 with prerequisites are skipped.
109
110 * "git update-server-info" learned not to rewrite the file with the
111 same contents.
112
113 * The way of specifying the path to find dynamic libraries at runtime
114 has been simplified. The old default to pass -R/path/to/dir has been
115 replaced with the new default to pass -Wl,-rpath,/path/to/dir,
116 which is the more recent GCC uses. Those who need to build with an
117 old GCC can still use "CC_LD_DYNPATH=-R"
118
119 * Prepare use of reachability index in topological walker that works
120 on a range (A..B).
121
122 * A new tutorial targeting specifically aspiring git-core
123 developers has been added.
124
125 * Auto-detect how to tell HP-UX aCC where to use dynamically linked
126 libraries from at runtime.
127
128 * "git mergetool" and its tests now spawn fewer subprocesses.
129
130 * Dev support update to help tracing out tests.
131
132 * Support to build with MSVC has been updated.
133
134 * "git fetch" that grabs from a group of remotes learned to run the
135 auto-gc only once at the very end.
136
137 * A handful of Windows build patches have been upstreamed.
138
139 * The code to read state files used by the sequencer machinery for
140 "git status" has been made more robust against a corrupt or stale
141 state files.
142
143 * "git for-each-ref" with multiple patterns have been optimized.
144
145 * The tree-walk API learned to pass an in-core repository
146 instance throughout more codepaths.
147
148 * When one step in multi step cherry-pick or revert is reset or
149 committed, the command line prompt script failed to notice the
150 current status, which has been improved.
151
152 * Many GIT_TEST_* environment variables control various aspects of
153 how our tests are run, but a few followed "non-empty is true, empty
154 or unset is false" while others followed the usual "there are a few
155 ways to spell true, like yes, on, etc., and also ways to spell
156 false, like no, off, etc." convention.
157
158 * Adjust the dir-iterator API and apply it to the local clone
159 optimization codepath.
160
161 * We have been trying out a few language features outside c89; the
162 coding guidelines document did not talk about them and instead had
163 a blanket ban against them.
164
165 * A test helper has been introduced to optimize preparation of test
166 repositories with many simple commits, and a handful of test
167 scripts have been updated to use it.
168
169
170 Fixes since v2.22
171 -----------------
172
173 * A relative pathname given to "git init --template=<path> <repo>"
174 ought to be relative to the directory "git init" gets invoked in,
175 but it instead was made relative to the repository, which has been
176 corrected.
177
178 * "git worktree add" used to fail when another worktree connected to
179 the same repository was corrupt, which has been corrected.
180
181 * The ownership rule for the file descriptor to fast-import remote
182 backend was mixed up, leading to an unrelated file descriptor getting
183 closed, which has been fixed.
184
185 * A "merge -c" instruction during "git rebase --rebase-merges" should
186 give the user a chance to edit the log message, even when there is
187 otherwise no need to create a new merge and replace the existing
188 one (i.e. fast-forward instead), but did not. Which has been
189 corrected.
190
191 * Code cleanup and futureproof.
192
193 * More parameter validation.
194
195 * "git update-server-info" used to leave stale packfiles in its
196 output, which has been corrected.
197
198 * The server side support for "git fetch" used to show incorrect
199 value for the HEAD symbolic ref when the namespace feature is in
200 use, which has been corrected.
201
202 * "git am -i --resolved" segfaulted after trying to see a commit as
203 if it were a tree, which has been corrected.
204
205 * "git bundle verify" needs to see if prerequisite objects exist in
206 the receiving repository, but the command did not check if we are
207 in a repository upfront, which has been corrected.
208
209 * "git merge --squash" is designed to update the working tree and the
210 index without creating the commit, and this cannot be countermanded
211 by adding the "--commit" option; the command now refuses to work
212 when both options are given.
213
214 * The data collected by fsmonitor was not properly written back to
215 the on-disk index file, breaking t7519 tests occasionally, which
216 has been corrected.
217
218 * Update to Unicode 12.1 width table.
219
220 * The command line to invoke a "git cat-file" command from inside
221 "git p4" was not properly quoted to protect a caret and running a
222 broken command on Windows, which has been corrected.
223
224 * "git request-pull" learned to warn when the ref we ask them to pull
225 from in the local repository and in the published repository are
226 different.
227
228 * When creating a partial clone, the object filtering criteria is
229 recorded for the origin of the clone, but this incorrectly used a
230 hardcoded name "origin" to name that remote; it has been corrected
231 to honor the "--origin <name>" option.
232
233 * "git fetch" into a lazy clone forgot to fetch base objects that are
234 necessary to complete delta in a thin packfile, which has been
235 corrected.
236
237 * The filter_data used in the list-objects-filter (which manages a
238 lazily sparse clone repository) did not use the dynamic array API
239 correctly---'nr' is supposed to point at one past the last element
240 of the array in use. This has been corrected.
241
242 * The description about slashes in gitignore patterns (used to
243 indicate things like "anchored to this level only" and "only
244 matches directories") has been revamped.
245
246 * The URL decoding code has been updated to avoid going past the end
247 of the string while parsing %-<hex>-<hex> sequence.
248
249 * The list of for-each like macros used by clang-format has been
250 updated.
251
252 * "git branch --list" learned to show branches that are checked out
253 in other worktrees connected to the same repository prefixed with
254 '+', similar to the way the currently checked out branch is shown
255 with '*' in front.
256 (merge 6e9381469e nb/branch-show-other-worktrees-head later to maint).
257
258 * Code restructuring during 2.20 period broke fetching tags via
259 "import" based transports.
260
261 * The commit-graph file is now part of the "files that the runtime
262 may keep open file descriptors on, all of which would need to be
263 closed when done with the object store", and the file descriptor to
264 an existing commit-graph file now is closed before "gc" finalizes a
265 new instance to replace it.
266
267 * "git checkout -p" needs to selectively apply a patch in reverse,
268 which did not work well.
269
270 * Code clean-up to avoid signed integer wraparounds during binary search.
271
272 * "git interpret-trailers" always treated '#' as the comment
273 character, regardless of core.commentChar setting, which has been
274 corrected.
275
276 * "git stash show 23" used to work, but no more after getting
277 rewritten in C; this regression has been corrected.
278
279 * "git rebase --abort" used to leave refs/rewritten/ when concluding
280 "git rebase -r", which has been corrected.
281
282 * An incorrect list of options was cached after command line
283 completion failed (e.g. trying to complete a command that requires
284 a repository outside one), which has been corrected.
285
286 * The code to parse scaled numbers out of configuration files has
287 been made more robust and also easier to follow.
288
289 * The codepath to compute delta islands used to spew progress output
290 without giving the callers any way to squelch it, which has been
291 fixed.
292
293 * Protocol capabilities that go over wire should never be translated,
294 but it was incorrectly marked for translation, which has been
295 corrected. The output of protocol capabilities for debugging has
296 been tweaked a bit.
297
298 * Use "Erase in Line" CSI sequence that is already used in the editor
299 support to clear cruft in the progress output.
300
301 * "git submodule foreach" did not protect command line options passed
302 to the command to be run in each submodule correctly, when the
303 "--recursive" option was in use.
304
305 * The configuration variable rebase.rescheduleFailedExec should be
306 effective only while running an interactive rebase and should not
307 affect anything when running a non-interactive one, which was not
308 the case. This has been corrected.
309
310 * The "git clone" documentation refers to command line options in its
311 description in the short form; they have been replaced with long
312 forms to make them more recognisable.
313
314 * Generation of pack bitmaps are now disabled when .keep files exist,
315 as these are mutually exclusive features.
316 (merge 7328482253 ew/repack-with-bitmaps-by-default later to maint).
317
318 * "git rm" to resolve a conflicted path leaked an internal message
319 "needs merge" before actually removing the path, which was
320 confusing. This has been corrected.
321
322 * "git stash --keep-index" did not work correctly on paths that have
323 been removed, which has been fixed.
324 (merge b932f6a5e8 tg/stash-keep-index-with-removed-paths later to maint).
325
326 * Window 7 update ;-)
327
328 * A codepath that reads from GPG for signed object verification read
329 past the end of allocated buffer, which has been fixed.
330
331 * "git clean" silently skipped a path when it cannot lstat() it; now
332 it gives a warning.
333
334 * "git push --atomic" that goes over the transport-helper (namely,
335 the smart http transport) failed to prevent refs to be pushed when
336 it can locally tell that one of the ref update will fail without
337 having to consult the other end, which has been corrected.
338
339 * The internal diff machinery can be made to read out of bounds while
340 looking for --function-context line in a corner case, which has been
341 corrected.
342 (merge b777f3fd61 jk/xdiff-clamp-funcname-context-index later to maint).
343
344 * Other code cleanup, docfix, build fix, etc.
345 (merge fbec05c210 cc/test-oidmap later to maint).
346 (merge 7a06fb038c jk/no-system-includes-in-dot-c later to maint).
347 (merge 81ed2b405c cb/xdiff-no-system-includes-in-dot-c later to maint).
348 (merge d61e6ce1dd sg/fsck-config-in-doc later to maint).