1Git 2.8 Release Notes 2===================== 3 4Updates since v2.7 5------------------ 6 7UI, Workflows & Features 8 9 * "branch --delete" has "branch -d" but "push --delete" does not. 10 11 * "git blame" learned to produce the progress eye-candy when it takes 12 too much time before emitting the first line of the result. 13 14 * "git grep" can now be configured (or told from the command line) 15 how many threads to use when searching in the working tree files. 16 17 * Some "git notes" operations, e.g. "git log --notes=<note>", should 18 be able to read notes from any tree-ish that is shaped like a notes 19 tree, but the notes infrastructure required that the argument must 20 be a ref under refs/notes/. Loosen it to require a valid ref only 21 when the operation would update the notes (in which case we must 22 have a place to store the updated notes tree, iow, a ref). 23 24 * "git grep" by default does not fall back to its "--no-index" 25 behaviour outside a directory under Git's control (otherwise the 26 user may by mistake end up running a huge recursive search); with a 27 new configuration (set in $HOME/.gitconfig--by definition this 28 cannot be set in the config file per project), this safety can be 29 disabled. 30 31 * "git pull --rebase" has been extended to allow invoking 32 "rebase -i". 33 34 * "git p4" learned to cope with the type of a file getting changed. 35 36 * "git format-patch" learned to notice format.outputDirectory 37 configuration variable. This allows "-o <dir>" option to be 38 omitted on the command line if you always use the same directory in 39 your workflow. 40 41 * "interpret-trailers" has been taught to optionally update a file in 42 place, instead of always writing the result to the standard output. 43 44 * Many commands that read files that are expected to contain text 45 that is generated (or can be edited) by the end user to control 46 their behaviour (e.g. "git grep -f <filename>") have been updated 47 to be more tolerant to lines that are terminated with CRLF (they 48 used to treat such a line to contain payload that ends with CR, 49 which is usually not what the users expect). 50 51 * "git notes merge" used to limit the source of the merged notes tree 52 to somewhere under refs/notes/ hierarchy, which was too limiting 53 when inventing a workflow to exchange notes with remote 54 repositories using remote-tracking notes trees (located in e.g. 55 refs/remote-notes/ or somesuch). 56 57 * "git ls-files" learned a new "--eol" option to help diagnose 58 end-of-line problems. 59 60 * "ls-remote" learned an option to show which branch the remote 61 repository advertises as its primary by pointing its HEAD at. 62 63 * New http.proxyAuthMethod configuration variable can be used to 64 specify what authentication method to use, as a way to work around 65 proxies that do not give error response expected by libcurl when 66 CURLAUTH_ANY is used. Also, the codepath for proxy authentication 67 has been taught to use credential API to store the authentication 68 material in user's keyrings. 69 70 71Performance, Internal Implementation, Development Support etc. 72 73 * Add a framework to spawn a group of processes in parallel, and use 74 it to run "git fetch --recurse-submodules" in parallel. 75 76 * A slight update to the Makefile to mark "phoney" targets 77 as such correctly. 78 79 * In-core storage of the reverse index for .pack files (which lets 80 you go from a pack offset to an object name) has been streamlined. 81 82 * d95138e6 (setup: set env $GIT_WORK_TREE when work tree is set, like 83 $GIT_DIR, 2015-06-26) attempted to work around a glitch in alias 84 handling by overwriting GIT_WORK_TREE environment variable to 85 affect subprocesses when set_git_work_tree() gets called, which 86 resulted in a rather unpleasant regression to "clone" and "init". 87 Try to address the same issue by always restoring the environment 88 and respawning the real underlying command when handling alias. 89 90 * The low-level code that is used to create symbolic references has 91 been updated to share more code with the code that deals with 92 normal references. 93 94 * strbuf_getline() and friends have been redefined to make it easier 95 to identify which callsite of (new) strbuf_getline_lf() should 96 allow and silently ignore carriage-return at the end of the line to 97 help users on DOSsy systems. 98 99 * "git shortlog" used to accumulate various pieces of information 100 regardless of what was asked to be shown in the final output. It 101 has been optimized by noticing what need not to be collected 102 (e.g. there is no need to collect the log messages when showing 103 only the number of changes). 104 105 * "git checkout $branch" (and other operations that share the same 106 underlying machinery) has been optimized. 107 108 * Automated tests in Travis CI environment has been optimized by 109 persisting runtime statistics of previous "prove" run, executing 110 tests that take longer before other ones; this reduces the total 111 wallclock time. 112 113 114Also contains various documentation updates and code clean-ups. 115 116 117Fixes since v2.7 118---------------- 119 120Unless otherwise noted, all the fixes since v2.7 in the maintenance 121track are contained in this release (see the maintenance releases' 122notes for details). 123 124 * An earlier change in 2.5.x-era broke users' hooks and aliases by 125 exporting GIT_WORK_TREE to point at the root of the working tree, 126 interfering when they tried to use a different working tree without 127 setting GIT_WORK_TREE environment themselves. 128 (merge df1e6ea nd/stop-setenv-work-tree later to maint). 129 130 * The "exclude_list" structure has the usual "alloc, nr" pair of 131 fields to be used by ALLOC_GROW(), but clear_exclude_list() forgot 132 to reset 'alloc' to 0 when it cleared 'nr' to discard the managed 133 array. 134 (merge 2653a8c nd/dir-exclude-cleanup later to maint). 135 136 * Paths that have been told the index about with "add -N" are not 137 quite yet in the index, but a few commands behaved as if they 138 already are in a harmful way. 139 (merge 4d55200 nd/ita-cleanup later to maint). 140 141 * "git send-email" was confused by escaped quotes stored in the alias 142 files saved by "mutt", which has been corrected. 143 (merge 2c510f2 ew/send-email-mutt-alias-fix later to maint). 144 145 * A few unportable C construct have been spotted by clang compiler 146 and have been fixed. 147 (merge a0df2e5 jk/clang-pedantic later to maint). 148 149 * The documentation has been updated to hint the connection between 150 the '--signoff' option and DCO. 151 (merge b2c150d dw/signoff-doc later to maint). 152 153 * "git reflog" incorrectly assumed that all objects that used to be 154 at the tip of a ref must be commits, which caused it to segfault. 155 (merge aecad37 dk/reflog-walk-with-non-commit later to maint). 156 157 * The ignore mechanism saw a few regressions around untracked file 158 listing and sparse checkout selection areas in 2.7.0; the change 159 that is responsible for the regression has been reverted. 160 (merge 8c72236 nd/exclusion-regression-fix later to maint). 161 162 * Some codepaths used fopen(3) when opening a fixed path in $GIT_DIR 163 (e.g. COMMIT_EDITMSG) that is meant to be left after the command is 164 done. This however did not work well if the repository is set to 165 be shared with core.sharedRepository and the umask of the previous 166 user is tighter. They have been made to work better by calling 167 unlink(2) and retrying after fopen(3) fails with EPERM. 168 (merge ea56518 js/fopen-harder later to maint). 169 170 * Asking gitweb for a nonexistent commit left a warning in the server 171 log. 172 173 Somebody may want to follow this up with an additional test, perhaps? 174 IIRC, we do test that no Perl warnings are given to the server log, 175 so this should have been caught if our test coverage were good. 176 (merge a9eb90a ho/gitweb-squelch-undef-warning later to maint). 177 178 * "git rebase", unlike all other callers of "gc --auto", did not 179 ignore the exit code from "gc --auto". 180 (merge 8c24f5b jk/ok-to-fail-gc-auto-in-rebase later to maint). 181 182 * Many codepaths that run "gc --auto" before exiting kept packfiles 183 mapped and left the file descriptors to them open, which was not 184 friendly to systems that cannot remove files that are open. They 185 now close the packs before doing so. 186 (merge d562102 js/close-packs-before-gc later to maint). 187 188 * A recent optimization to filter-branch in v2.7.0 introduced a 189 regression when --prune-empty filter is used, which has been 190 corrected. 191 (merge 1dc413e jk/filter-branch-no-index later to maint). 192 193 * The description for SANITY prerequisite the test suite uses has 194 been clarified both in the comment and in the implementation. 195 (merge 719c3da jk/sanity later to maint). 196 197 * "git tag" started listing a tag "foo" as "tags/foo" when a branch 198 named "foo" exists in the same repository; remove this unnecessary 199 disambiguation, which is a regression introduced in v2.7.0. 200 (merge 0571979 jk/list-tag-2.7-regression later to maint). 201 202 * The way "git svn" uses auth parameter was broken by Subversion 203 1.9.0 and later. 204 (merge 0b66415 ew/svn-1.9.0-auth later to maint). 205 206 * The "split" subcommand of "git subtree" (in contrib/) incorrectly 207 skipped merges when it shouldn't, which was corrected. 208 (merge 933cfeb dw/subtree-split-do-not-drop-merge later to maint). 209 210 * A few options of "git diff" did not work well when the command was 211 run from a subdirectory. 212 (merge a97262c nd/diff-with-path-params later to maint). 213 214 * The command line completion learned a handful of additional options 215 and command specific syntax. 216 (merge fa4b5e3 jk/completion-rebase later to maint). 217 (merge f7c2e1a pw/completion-show-branch later to maint). 218 (merge d7d4ca8 pw/completion-stash later to maint). 219 (merge e6414b4 tb/complete-word-diff-regex later to maint). 220 221 * dirname() emulation has been added, as Msys2 lacks it. 222 (merge e7d5ce8 js/dirname-basename later to maint). 223 224 * The underlying machinery used by "ls-files -o" and other commands 225 have been taught not to create empty submodule ref cache for a 226 directory that is not a submodule. This removes a ton of wasted 227 CPU cycles. 228 (merge a2d5156 jk/ref-cache-non-repository-optim later to maint). 229 230 * Other minor clean-ups and documentation updates 231 (merge 99487cf ss/user-manual later to maint). 232 (merge e914ef0 ew/for-each-ref-doc later to maint). 233 (merge 36fc7d8 sg/t6050-failing-editor-test-fix later to maint). 234 (merge 60253a6 ss/clone-depth-single-doc later to maint). 235 (merge bd02e97 lv/add-doc-working-tree later to maint).