4 Backward compatibility notes
5 ----------------------------
7 * The default value we give to the environment variable LESS has been
8 changed from "FRSX" to "FRX", losing "S" (chop long lines instead
9 of wrapping). Existing users who prefer not to see line-wrapped
10 output may want to set
12 $ git config core.pager "less -S"
14 to restore the traditional behaviour. It is expected that people
15 find output from most subcommands easier to read with the new
16 default, except for "blame" which tends to produce really long
17 lines. To override the new default only for "git blame", you can
20 $ git config pager.blame "less -S"
22 * A few disused directories in contrib/ have been retired.
28 UI, Workflows & Features
30 * Since the very beginning of Git, we gave the LESS environment a
31 default value "FRSX" when we spawn "less" as the pager. "S" (chop
32 long lines instead of wrapping) has been removed from this default
33 set of options, because it is more or less a personal taste thing,
34 as opposed to the others that have good justifications (i.e. "R" is
35 very much justified because many kinds of output we produce are
36 colored and "FX" is justified because output we produce is often
39 * The logic and data used to compute the display width needed for
40 UTF-8 strings have been updated to match Unicode 7.0 better.
42 * HTTP-based transports learned to better propagate the error messages from
43 the webserver to the client coming over the HTTP transport.
45 * The completion script for bash (in contrib/) has been updated to
46 better handle aliases that define a complex sequence of commands.
48 * The "core.preloadindex" configuration variable is enabled by default,
49 allowing modern platforms to take advantage of their
52 * "git clone" applies the "if cloning from a local disk, physically
53 copy the repository using hardlinks, unless otherwise told not to with
54 --no-local" optimization when the url.*.insteadOf mechanism rewrites a
55 remote-repository "git clone $URL" into a
56 clone from a local disk.
58 * "git commit --date=<date>" option learned more
59 timestamp formats, including "--date=now".
61 * The `core.commentChar` configuration variable is used to specify a
62 custom comment character (other than the default "#") for
63 the commit message editor. This can be set to `auto` to attempt to
64 choose a different character that does not conflict with any that
65 already starts a line in the message being edited, for cases like
68 * "git format-patch" learned --signature-file=<file> to add the contents
69 of a file as a signature to the mail message it produces.
71 * "git grep" learned the grep.fullname configuration variable to force
72 "--full-name" to be the default. This may cause regressions for
73 scripted users who do not expect this new behaviour.
75 * "git imap-send" learned to ask the credential helper for auth
78 * "git log" and friends now understand the value "auto" for the
79 "log.decorate" configuration variable to enable the "--decorate"
80 option automatically when the output is sent to tty.
82 * "git merge" without an argument, even when there is an upstream
83 defined for the current branch, refused to run until
84 merge.defaultToUpstream is set to true. Flip the default of that
85 configuration variable to true.
87 * "git mergetool" learned to drive the vimdiff3 backend.
89 * mergetool.prompt used to default to 'true', always asking "do you
90 really want to run the tool on this path?". The default has been
91 changed to 'false'. However, the prompt will still appear if
92 mergetool used its autodetection system to guess which tool to use.
93 Users who explicitly specify or configure a tool will no longer see
94 the prompt by default.
96 Strictly speaking, this is a backward incompatible change and
97 users need to explicitly set the variable to 'true' if they want
98 to be prompted to confirm running the tool on each path.
100 * "git replace" learned the "--edit" subcommand to create a
101 replacement by editing an existing object.
103 * "git replace" learned a "--graft" option to rewrite the parents of a
106 * "git send-email" learned "--to-cover" and "--cc-cover" options, to
107 tell it to copy To: and Cc: headers found in the first input file
108 when emitting later input files.
110 * "git svn" learned to cope with malformed timestamps with only one
111 digit in the hour part, e.g. 2014-01-07T5:01:02.048176Z, emitted
112 by some broken subversion server implementations.
114 * "git tag" when editing the tag message shows the name of the tag
115 being edited as a comment in the editor.
117 * "git tag" learned to pay attention to "tag.sort" configuration, to
118 be used as the default sort order when no --sort=<value> option
121 * A new "git verify-commit" command, to check GPG signatures in signed
122 commits, in a way similar to "git verify-tag" is used to check
123 signed tags, was added.
126 Performance, Internal Implementation, etc.
128 * Build procedure for 'subtree' (in contrib/) has been cleaned up.
130 * Support for the profile-feedback build, which has
131 bit-rotted for quite a while, has been updated.
133 * An experimental format to use two files (the base file and
134 incremental changes relative to it) to represent the index has been
135 introduced; this may reduce I/O cost of rewriting a large index
136 when only small part of the working tree changes.
138 * Effort to shrink the size of patches Windows folks maintain on top
139 by upstreaming them continues. More tests that are not applicable
140 to the Windows environment are identified and either skipped or
143 * Eradication of "test $condition -a $condition" from our scripts
146 * The `core.deltabasecachelimit` used to default to 16 MiB , but this
147 proved to be too small, and has been bumped to 96 MiB.
149 * "git blame" has been optimized greatly by reorganising the data
150 structure that is used to keep track of the work to be done.
152 * "git diff" that compares 3-or-more trees (e.g. parents and the
153 result of a merge) has been optimized.
155 * The API to update/delete references are being converted to handle
156 updates to multiple references in a transactional way. As an
157 example, "update-ref --stdin [-z]" has been updated to use this
160 * skip_prefix() and strip_suffix() API functions are used a lot more
161 widely throughout the codebase now.
163 * Parts of the test scripts can be skipped by using a range notation,
164 e.g. "sh t1234-test.sh --run='1-4 6 8-'" to omit test piece 5 and 7
165 and run everything else.
168 Also contains various documentation updates and code clean-ups.
174 Unless otherwise noted, all the fixes since v2.0 in the maintenance
175 track are contained in this release (see the maintenance releases'
178 * We used to unconditionally disable the pager in the pager process
179 we spawn to feed out output, but that prevented people who want to
180 run "less" within "less" from doing so.
181 (merge c0459ca je/pager-do-not-recurse later to maint).
183 * Tools that read diagnostic output in our standard error stream do
184 not want to see terminal control sequence (e.g. erase-to-eol).
185 Detect them by checking if the standard error stream is connected
187 (merge 38de156 mn/sideband-no-ansi later to maint).
189 * Mishandling of patterns in .gitignore that have trailing SPs quoted
190 with backslashes (e.g. ones that end with "\ ") has been
192 (merge 97c1364be6b pb/trim-trailing-spaces later to maint).
194 * Reworded the error message given upon a failure to open an existing
195 loose object file due to e.g. permission issues; it was reported as
196 the object being corrupt, but that is not quite true.
197 (merge d6c8a05 jk/report-fail-to-read-objects-better later to maint).
199 * "git log -2master" is a common typo that shows two commits starting
200 from whichever random branch that is not 'master' that happens to
201 be checked out currently.
202 (merge e3fa568 jc/revision-dash-count-parsing later to maint).
204 * Code to avoid adding the same alternate object store twice was
205 subtly broken for a long time, but nobody seems to have noticed.
206 (merge 80b4785 rs/fix-alt-odb-path-comparison later to maint).
207 (merge 539e750 ek/alt-odb-entry-fix later to maint).
209 * The "%<(10,trunc)%s" pretty format specifier in the log family of
210 commands is used to truncate the string to a given length (e.g. 10
211 in the example) with padding to column-align the output, but did
212 not take into account that number of bytes and number of display
213 columns are different.
214 (merge 7d50987 as/pretty-truncate later to maint).
216 * "%G" (nothing after G) is an invalid pretty format specifier, but
217 the parser did not notice it as garbage.
218 (merge 958b2eb jk/pretty-G-format-fixes later to maint).
220 * A handful of code paths had to read the commit object more than
221 once when showing header fields that are usually not parsed. The
222 internal data structure to keep track of the contents of the commit
223 object has been updated to reduce the need for this double-reading,
224 and to allow the caller find the length of the object.
225 (merge 218aa3a jk/commit-buffer-length later to maint).
227 * The "mailmap.file" configuration option did not support tilde
228 expansion (i.e. ~user/path and ~/path).
229 (merge 9352fd5 ow/config-mailmap-pathname later to maint).
231 * The completion scripts (in contrib/) did not know about quite a few
232 options that are common between "git merge" and "git pull", and a
233 couple of options unique to "git merge".
234 (merge 8fee872 jk/complete-merge-pull later to maint).
236 * The unix-domain socket used by the sample credential cache daemon
237 tried to unlink an existing stale one at a wrong path, if the path
238 to the socket was given as an overlong path that does not fit in
239 the sun_path member of the sockaddr_un structure.
240 (merge 2869b3e rs/fix-unlink-unix-socket later to maint).
242 * An ancient rewrite passed a wrong pointer to a curl library
243 function in a rarely used code path.
244 (merge 479eaa8 ah/fix-http-push later to maint).
246 * "--ignore-space-change" option of "git apply" ignored the spaces
247 at the beginning of lines too aggressively, which is inconsistent
248 with the option of the same name that "diff" and "git diff" have.
249 (merge 14d3bb4 jc/apply-ignore-whitespace later to maint).
251 * "git blame" miscounted the number of columns needed to show localized
252 timestamps, resulting in a jaggy left-side-edge for the source code
254 (merge dd75553 jx/blame-align-relative-time later to maint).
256 * "git blame" assigned the blame to the copy in the working-tree if
257 the repository is set to core.autocrlf=input and the file used CRLF
259 (merge 4d4813a bc/blame-crlf-test later to maint).
261 * "git clone -b brefs/tags/bar" would have mistakenly thought we were
262 following a single tag, even though it was a name of the branch,
263 because it incorrectly used strstr().
264 (merge 60a5f5f jc/fix-clone-single-starting-at-a-tag later to maint).
266 * "git commit --allow-empty-message -C $commit" did not work when the
267 commit did not have any log message.
268 (merge 076cbd6 jk/commit-C-pick-empty later to maint).
270 * "git diff --find-copies-harder" sometimes pretended as if the mode
271 bits have changed for paths that are marked with the assume-unchanged
273 (merge 5304810 jk/diff-files-assume-unchanged later to maint).
275 * "filter-branch" left an empty single-parent commit that results when
276 all parents of a merge commit get mapped to the same commit, even
277 under "--prune-empty".
278 (merge 79bc4ef cb/filter-branch-prune-empty-degenerate-merges later to maint).
280 * "git format-patch" did not enforce the rule that the "--follow"
281 option from the log/diff family of commands must be used with
282 exactly one pathspec.
283 (merge dd63f16 jk/diff-follow-must-take-one-pathspec later to maint).
285 * "git gc --auto" was recently changed to run in the background to
286 give control back early to the end-user sitting in front of the
287 terminal, but it forgot that housekeeping involving reflogs should
288 be done without other processes competing for accesses to the refs.
289 (merge 62aad18 nd/daemonize-gc later to maint).
291 * "git grep -O" to show the lines that hit in the pager did not work
292 well with case insensitive search. We now spawn "less" with its
293 "-I" option when it is used as the pager (which is the default).
294 (merge f7febbe sk/spawn-less-case-insensitively-from-grep-O-i later to maint).
296 * We used to disable threaded "git index-pack" on platforms without
297 thread-safe pread(); use a different workaround for such
298 platforms to allow threaded "git index-pack".
299 (merge 3953949 nd/index-pack-one-fd-per-thread later to maint).
301 * The error reporting from "git index-pack" has been improved to
302 distinguish missing objects from type errors.
303 (merge 77583e7 jk/index-pack-report-missing later to maint).
305 * "log --show-signature" incorrectly decided the color to paint a
306 mergetag that was and was not correctly validated.
307 (merge 42c55ce mg/fix-log-mergetag-color later to maint).
309 * "log --show-signature" did not pay attention to the "--graph" option.
310 (merge cf3983d zk/log-graph-showsig later to maint).
312 * "git mailinfo" used to read beyond the ends of header strings while
313 parsing an incoming e-mail message to extract the patch.
314 (merge b1a013d rs/mailinfo-header-cmp later to maint).
316 * On a case insensitive filesystem, merge-recursive incorrectly
317 deleted the file that is to be renamed to a name that is the same
318 except for case differences.
319 (merge baa37bf dt/merge-recursive-case-insensitive later to maint).
321 * Merging changes into a file that ends in an incomplete line made the
322 last line into a complete one, even when the other branch did not
323 change anything around the end of file.
324 (merge ba31180 mk/merge-incomplete-files later to maint).
326 * "git pack-objects" unnecessarily copied the previous contents when
327 extending the hashtable, even though it will populate the table
329 (merge fb79947 rs/pack-objects-no-unnecessary-realloc later to maint).
331 * Recent updates to "git repack" started to duplicate objects that
332 are in packfiles marked with the .keep flag into the new packfile by
334 (merge d078d85 jk/repack-pack-keep-objects later to maint).
336 * "git rerere forget" did not work well when merge.conflictstyle
337 was set to a non-default value.
338 (merge de3d8bb fc/rerere-conflict-style later to maint).
340 * "git remote rm" and "git remote prune" can involve removing many
341 refs at once, which is not a very efficient thing to do when very
342 many refs exist in the packed-refs file.
343 (merge e6bea66 jl/remote-rm-prune later to maint).
345 * "git log --exclude=<glob> --all | git shortlog" worked as expected,
346 but "git shortlog --exclude=<glob> --all", which is supposed to be
347 identical to the above pipeline, was not accepted at the command
348 line argument parser level.
349 (merge eb07774 jc/shortlog-ref-exclude later to maint).
351 * The autostash mode of "git rebase -i" did not restore the dirty
352 working tree state if the user aborted the interactive rebase by
353 emptying the insn sheet.
354 (merge ddb5432 rr/rebase-autostash-fix later to maint).
356 * "git rebase --fork-point" did not filter out patch-identical
359 * During "git rebase --merge", a conflicted patch could not be
360 skipped with "--skip" if the next one also conflicted.
361 (merge 95104c7 bc/fix-rebase-merge-skip later to maint).
363 * "git show -s" (i.e. show log message only) used to incorrectly emit
364 an extra blank line after a merge commit.
365 (merge ad2f725 mk/show-s-no-extra-blank-line-for-merges later to maint).
367 * "git status", even though it is a read-only operation, tries to
368 update the index with refreshed lstat(2) info to optimize future
369 accesses to the working tree opportunistically, but this could
370 race with a "read-write" operation that modifies the index while it
371 is running. Detect such a race and avoid overwriting the index.
372 (merge 426ddee ym/fix-opportunistic-index-update-race later to maint).
374 * "git status" (and "git commit") behaved as if changes in a modified
375 submodule are not there if submodule.*.ignore configuration is set,
376 which was misleading. The configuration is only to unclutter diff
377 output during the course of development, and not to hide
378 changes in the "status" output to cause the users forget to commit
380 (merge c215d3d jl/status-added-submodule-is-never-ignored later to maint).
382 * Documentation for "git submodule sync" forgot to say that the subcommand
383 can take the "--recursive" option.
384 (merge 9393ae7 mc/doc-submodule-sync-recurse later to maint).
386 * "git update-index --cacheinfo" in 2.0 release crashed on a
387 malformed command line.
388 (merge c8e1ee4 jc/rev-parse-argh-dashed-multi-words later to maint).
390 * The mode to run tests with HTTP server tests disabled was broken.
391 (merge afa53fe na/no-http-test-in-the-middle later to maint).
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