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1 Git 2.9 Release Notes
2 =====================
4 Backward compatibility note
5 ---------------------------
7 The end-user facing Porcelain level commands in the "git diff" and
8 "git log" by default enables the rename detection; you can still use
9 "diff.renames" configuration variable to disable this.
11 Merging two branches that have no common ancestor with "git merge" is
12 by default forbidden now to prevent creating such an unusual merge by
13 mistake.
16 Updates since v2.8
17 ------------------
19 UI, Workflows & Features
21 * The end-user facing Porcelain level commands like "diff" and "log"
22 now enables the rename detection by default.
24 * The credential.helper configuration variable is cumulative and
25 there is no good way to override it from the command line. As
26 a special case, giving an empty string as its value now serves
27 as the signal to clear the values specified in various files.
29 * A new "interactive.diffFilter" configuration can be used to
30 customize the diff shown in "git add -i" session.
32 * "git p4" now allows P4 author names to be mapped to Git author
33 names.
35 * "git rebase -x" can be used without passing "-i" option.
37 * "git -c credential.<var>=<value> submodule" can now be used to
38 propagate configuration variables related to credential helper
39 down to the submodules.
41 * "git tag" can create an annotated tag without explicitly given an
42 "-a" (or "-s") option (i.e. when a tag message is given). A new
43 configuration variable, tag.forceSignAnnotated, can be used to tell
44 the command to create signed tag in such a situation.
46 * "git merge" used to allow merging two branches that have no common
47 base by default, which led to a brand new history of an existing
48 project created and then get pulled by an unsuspecting maintainer,
49 which allowed an unnecessary parallel history merged into the
50 existing project. The command has been taught not to allow this by
51 default, with an escape hatch "--allow-unrelated-histories" option
52 to be used in a rare event that merges histories of two projects
53 that started their lives independently.
54 (merge e379fdf jc/merge-refuse-new-root later to maint).
56 * "git apply -v" learned to report paths in the patch that were
57 skipped via --include/--exclude mechanism or being outside the
58 current working directory.
59 (merge 3f57944 nd/apply-report-skip later to maint).
62 Performance, Internal Implementation, Development Support etc.
64 * The embedded args argv-array in the child process is used to build
65 the command line to run pack-objects instead of using a separate
66 array of strings.
67 (merge 65a3629 mp/upload-pack-use-embedded-args later to maint).
69 * A test for tags has been restructured so that more parts of it can
70 easily be run on a platform without a working GnuPG.
72 * The startup_info data, which records if we are working inside a
73 repository (among other things), are now uniformly available to Git
74 subcommand implementations, and Git avoids attempting to touch
75 references when we are not in a repository.
76 (merge 11e6b3f jk/startup-info later to maint).
78 * The command line argument parser for "receive-pack" has been
79 rewritten to use parse-options.
81 * A major part of "git submodule update" has been ported to C to take
82 advantage of the recently added framework to run download tasks in
83 parallel.
85 * Rename bunch of tests on "git clone" for better organization.
86 (merge 8fbb03a sb/clone-t57-t56 later to maint).
88 * The tests that involve running httpd leaked the system-wide
89 configuration in /etc/gitconfig to the tested environment.
90 (merge 1fad503 jk/test-httpd-config-nosystem later to maint).
92 * Build updates for MSVC.
93 (merge 0ef60af ss/msvc later to maint).
95 Also contains various documentation updates and code clean-ups.
98 Fixes since v2.8
99 ----------------
101 Unless otherwise noted, all the fixes since v2.8 in the maintenance
102 track are contained in this release (see the maintenance releases'
103 notes for details).
105 * "git config --get-urlmatch", unlike other variants of the "git
106 config --get" family, did not signal error with its exit status
107 when there was no matching configuration.
108 (merge 24990b2 jk/config-get-urlmatch later to maint).
110 * The "--local-env-vars" and "--resolve-git-dir" options of "git
111 rev-parse" failed to work outside a repository when the command's
112 option parsing was rewritten in 1.8.5 era.
113 (merge fc7d47f jk/rev-parse-local-env-vars later to maint).
115 * "git index-pack --keep[=<msg>] pack-$name.pack" simply did not work.
116 (merge 0e94242 jc/maint-index-pack-keep later to maint).
118 * Fetching of history by naming a commit object name directly didn't
119 work across remote-curl transport.
120 (merge 754ecb1 gf/fetch-pack-direct-object-fetch later to maint).
122 * A small memory leak in an error codepath has been plugged in xdiff
123 code.
124 (merge 87f1625 rj/xdiff-prepare-plug-leak-on-error-codepath later to maint).
126 * strbuf_getwholeline() did not NUL-terminate the buffer on certain
127 corner cases in its error codepath.
128 (merge b709043 jk/getwholeline-getdelim-empty later to maint).
130 * "git mergetool" did not work well with conflicts that both sides
131 deleted.
132 (merge a298604 da/mergetool-delete-delete-conflict later to maint).
134 * "git send-email" had trouble parsing alias file in mailrc format
135 when lines in it had trailing whitespaces on them.
136 (merge a277d1e jk/send-email-rtrim-mailrc-alias later to maint).
138 * When "git merge --squash" stopped due to conflict, the concluding
139 "git commit" failed to read in the SQUASH_MSG that shows the log
140 messages from all the squashed commits.
141 (merge b64c1e0 ss/commit-squash-msg later to maint).
143 * "git merge FETCH_HEAD" dereferenced NULL pointer when merging
144 nothing into an unborn history (which is arguably unusual usage,
145 which perhaps was the reason why nobody noticed it).
146 (merge b84e65d jv/merge-nothing-into-void later to maint).
148 * Other minor clean-ups and documentation updates
149 (merge aed7480 mm/lockfile-error-message later to maint).
150 (merge bfee614 jc/index-pack later to maint).
151 (merge f870899 ss/exc-flag-is-a-collection-of-bits later to maint).
152 (merge dde7891 pb/t7502-drop-dup later to maint).
153 (merge 3bd1b51 cc/doc-recommend-performance-trace-to-file later to maint).
154 (merge 7d5e9c9 jk/credential-cache-comment-exit later to maint).
155 (merge 16a86d4 nd/apply-doc later to maint).
156 (merge c3f6b85 pb/opt-cmdmode-doc later to maint).
157 (merge 30211fb oa/doc-diff-check later to maint).