1Git 2.7 Release Notes 2===================== 3 4Updates since v2.6 5------------------ 6 7UI, Workflows & Features 8 9 * "git remote" learned "get-url" subcommand to show the URL for a 10 given remote name used for fetching and pushing. 11 12 * There was no way to defeat a configured rebase.autostash variable 13 from the command line, as "git rebase --no-autostash" was missing. 14 15 * "git log --date=local" used to only show the normal (default) 16 format in the local timezone. The command learned to take 'local' 17 as an instruction to use the local timezone with other formats, 18 19 * The refs used during a "git bisect" session is now per-worktree so 20 that independent bisect sessions can be done in different worktrees 21 created with "git worktree add". 22 23 * Users who are too busy to type three extra keystrokes to ask for 24 "git stash show -p" can now set stash.showPatch configuration 25 varible to true to always see the actual patch, not just the list 26 of paths affected with feel for the extent of damage via diffstat. 27 28 * "quiltimport" allows to specify the series file by honoring the 29 $QUILT_SERIES environment and also --series command line option. 30 31 * The use of 'good/bad' in "git bisect" made it confusing to use when 32 hunting for a state change that is not a regression (e.g. bugfix). 33 The command learned 'old/new' and then allows the end user to 34 say e.g. "bisect start --term-old=fast --term-new=slow" to find a 35 performance regression. 36 37 * "git interpret-trailers" can now run outside of a Git repository. 38 39 * "git p4" learned to reencode the pathname it uses to communicate 40 with the p4 depot with a new option. 41 42 * Give progress meter to "git filter-branch". 43 44 * Allow a later "!/abc/def" to override an earlier "/abc" that 45 appears in the same .gitignore file to make it easier to express 46 "everything in /abc directory is ignored, except for ...". 47 48 * Teach "git p4" to send large blobs outside the repository by 49 talking to Git LFS. 50 51 * Prepare for Git on-disk repository representation to undergo 52 backward incompatible changes by introducing a new repository 53 format version "1", with an extension mechanism. 54 (merge 067fbd4 jk/repository-extension later to maint). 55 56 * "git worktree" learned a "list" subcommand. 57 58 * "git clone --dissociate" learned that it can be used even when 59 "--reference" was not used at the same time. 60 61 * "git blame" learnt to take "--first-parent" and "--reverse" at the 62 same time when it makes sense. 63 64 * "git checkout" did not follow the usual "--[no-]progress" 65 convention and implemented only "--quiet" that is essentially 66 a superset of "--no-progress". Extend the command to support the 67 usual "--[no-]progress". 68 69 * The semantics of tranfer.hideRefs configuration variable have been 70 extended to work better with the ref "namespace" feature that lets 71 you throw unrelated bunches of repositories in a single physical 72 repository and virtually serve them as separate ones. 73 74 * send-email config variables whose values are pathnames now go 75 through the ~username/ expansion. 76 77 * bash completion learnt to TAB-complete recipient addresses given 78 to send-email. 79 80 * The credential-cache daemon can be told to ignore SIGHUP to work 81 around issue when running Git from inside emacs. 82 83 84Performance, Internal Implementation, Development Support etc. 85 86 * The infrastructure to rewrite "git submodule" in C is being built 87 incrementally. Let's polish these early parts well enough and make 88 them graduate to 'next' and 'master', so that the more involved 89 follow-up can start cooking on a solid ground. 90 91 * Some features from "git tag -l" and "git branch -l" have been made 92 available to "git for-each-ref" so that eventually the unified 93 implementation can be shared across all three. The version merged 94 to the 'master' branch earlier had a performance regression in "tag 95 --contains", which has since been corrected. 96 97 * Because "test_when_finished" in our test framework queues the 98 clean-up tasks to be done in a shell variable, it should not be 99 used inside a subshell. Add a mechanism to allow 'bash' to catch 100 such uses, and fix the ones that were found. 101 (merge 0968f12 jk/test-lint-forbid-when-finished-in-subshell later to maint). 102 103 * The debugging infrastructure for pkt-line based communication has 104 been improved to mark the side-band communication specifically. 105 (merge fd89433 jk/async-pkt-line later to maint). 106 107 * Update "git branch" that list existing branches, using the 108 ref-filter API that is shared with "git tag" and "git 109 for-each-ref". 110 111 * The test for various line-ending conversions has been enhanced. 112 113 * A few test scripts around "git p4" have been improved for 114 portability. 115 116 * Many allocations that is manually counted (correctly) that are 117 followed by strcpy/sprintf have been replaced with a less error 118 prone constructs such as xstrfmt. 119 120 * The internal stripspace() function has been moved to where it 121 logically belongs to, i.e. strbuf API, and the command line parser 122 of "git stripspace" has been updated to use the parse_options API. 123 (merge bed4452 tk/stripspace later to maint). 124 125 * "git am" used to spawn "git mailinfo" via run_command() API once 126 per each patch, but learned to make a direct call to mailinfo() 127 instead. 128 129 * The implementation of "git mailinfo" was refactored so that a 130 mailinfo() function can be directly called from inside a process. 131 132 * With a "debug" helper, debugging of a single "git" invocation in 133 our test scripts has become a lot easier. 134 135 * The "configure" script did not test for -lpthread correctly, which 136 upset some linkers. 137 138 * Cross completed task off of subtree project's todo list. 139 140 * Test cleanups for the subtree project. 141 142 * Clean up style in an ancient test t9300. 143 144 * Work around some test flakiness with p4d. 145 146 * Fsck did not correctly detect a NUL-truncated header in a tag. 147 148 * Use a safer behavior when we hit errors verifying remote certificates. 149 150 * Speed up filter-branch for cases where we only care about rewriting 151 commits, not tree data. 152 153 * The parse-options API has been updated to make "-h" command line 154 option work more consistently in all commands. 155 156 * "git svn rebase/mkdirs" got optimized by keeping track of empty 157 directories better. 158 159 160Also contains various documentation updates and code clean-ups. 161 162 163Fixes since v2.6 164---------------- 165 166Unless otherwise noted, all the fixes since v2.6 in the maintenance 167track are contained in this release (see the maintenance releases' 168notes for details). 169 170 * Very small number of options take a parameter that is optional 171 (which is not a great UI element as they can only appear at the end 172 of the command line). Add notice to documentation of each and 173 every one of them. 174 (merge 2b594bf mm/keyid-docs later to maint). 175 176 * "git blame --first-parent v1.0..v2.0" was not rejected but did not 177 limit the blame to commits on the first parent chain. 178 (merge 95a4fb0 jk/blame-first-parent later to maint). 179 180 * "git subtree" (in contrib/) now can take whitespaces in the 181 pathnames, not only in the in-tree pathname but the name of the 182 directory that the repository is in. (merge 5b6ab38 183 as/subtree-with-spaces later to maint). 184 185 * The ssh transport, just like any other transport over the network, 186 did not clear GIT_* environment variables, but it is possible to 187 use SendEnv and AcceptEnv to leak them to the remote invocation of 188 Git, which is not a good idea at all. Explicitly clear them just 189 like we do for the local transport. 190 (merge a48b409 jk/connect-clear-env later to maint). 191 192 * Correct "git p4 --detect-labels" so that it does not fail to create 193 a tag that points at a commit that is also being imported. 194 (merge b43702a ld/p4-import-labels later to maint). 195 196 * The Makefile always runs the library archiver with hardcoded "crs" 197 options, which was inconvenient for exotic platforms on which 198 people want to use programs with totally different set of command 199 line options. 200 (merge ac179b4 jw/make-arflags-customizable later to maint). 201 202 * Customization to change the behaviour with "make -w" and "make -s" 203 in our Makefile was broken when they were used together. 204 (merge ef49e05 jk/make-findstring-makeflags-fix later to maint). 205 206 * Allocation related functions and stdio are unsafe things to call 207 inside a signal handler, and indeed killing the pager can cause 208 glibc to deadlock waiting on allocation mutex as our signal handler 209 tries to free() some data structures in wait_for_pager(). Reduce 210 these unsafe calls. 211 (merge 507d780 ti/glibc-stdio-mutex-from-signal-handler later to maint). 212 213 * The way how --ref/--notes to specify the notes tree reference are 214 DWIMmed was not clearly documented. 215 (merge e14c92e jk/notes-dwim-doc later to maint). 216 217 * "git gc" used to barf when a symbolic ref has gone dangling 218 (e.g. the branch that used to be your upstream's default when you 219 cloned from it is now gone, and you did "fetch --prune"). 220 (merge 14886b4 js/gc-with-stale-symref later to maint). 221 222 * "git clone --dissociate" runs a big "git repack" process at the 223 end, and it helps to close file descriptors that are open on the 224 packs and their idx files before doing so on filesystems that 225 cannot remove a file that is still open. 226 (merge 786b150 js/clone-dissociate later to maint). 227 228 * Description of the "log.follow" configuration variable in "git log" 229 documentation is now also copied to "git config" documentation. 230 (merge fd8d07e dt/log-follow-config later to maint). 231 232 * "git rebase -i" had a minor regression recently, which stopped 233 considering a line that begins with an indented '#' in its insn 234 sheet not a comment. Further, the code was still too picky on 235 Windows where CRLF left by the editor is turned into a trailing CR 236 on the line read via the "read" built-in command of bash. Both of 237 these issues are now fixed. 238 (merge 39743cf gr/rebase-i-drop-warn later to maint). 239 240 * After "git checkout --detach", "git status" reported a fairly 241 useless "HEAD detached at HEAD", instead of saying at which exact 242 commit. 243 (merge 0eb8548 mm/detach-at-HEAD-reflog later to maint). 244 245 * When "git send-email" wanted to talk over Net::SMTP::SSL, 246 Net::Cmd::datasend() did not like to be fed too many bytes at the 247 same time and failed to send messages. Send the payload one line 248 at a time to work around the problem. 249 (merge f60c483 sa/send-email-smtp-batch-data-limit later to maint). 250 251 * When "git am" was rewritten as a built-in, it stopped paying 252 attention to user.signingkey, which was fixed. 253 (merge 434c64d pt/am-builtin later to maint). 254 255 * It was not possible to use a repository-lookalike created by "git 256 worktree add" as a local source of "git clone". 257 (merge d78db84 nd/clone-linked-checkout later to maint). 258 259 * On a case insensitive filesystems, setting GIT_WORK_TREE variable 260 using a random cases that does not agree with what the filesystem 261 thinks confused Git that it wasn't inside the working tree. 262 (merge 63ec5e1 js/icase-wt-detection later to maint). 263 264 * Performance-measurement tests did not work without an installed Git. 265 (merge 31cd128 sb/perf-without-installed-git later to maint). 266 267 * A test script for the HTTP service had a timing dependent bug, 268 which was fixed. 269 (merge 362d8b6 sb/http-flaky-test-fix later to maint). 270 271 * There were some classes of errors that "git fsck" diagnosed to its 272 standard error that did not cause it to exit with non-zero status. 273 (merge 122f76f jc/fsck-dropped-errors later to maint). 274 275 * Work around "git p4" failing when the P4 depot records the contents 276 in UTF-16 without UTF-16 BOM. 277 (merge 1f5f390 ls/p4-translation-failure later to maint). 278 279 * When "git gc --auto" is backgrounded, its diagnosis message is 280 lost. Save it to a file in $GIT_DIR and show it next time the "gc 281 --auto" is run. 282 (merge 329e6e8 nd/gc-auto-background-fix later to maint). 283 284 * The submodule code has been taught to work better with separate 285 work trees created via "git worktree add". 286 (merge 11f9dd7 mk/submodule-gitdir-path later to maint). 287 288 * "git gc" is safe to run anytime only because it has the built-in 289 grace period to protect young objects. In order to run with no 290 grace period, the user must make sure that the repository is 291 quiescent. 292 (merge fae1a90 jc/doc-gc-prune-now later to maint). 293 294 * A recent "filter-branch --msg-filter" broke skipping of the commit 295 object header, which is fixed. 296 (merge a5a4b3f jk/filter-branch-use-of-sed-on-incomplete-line later to maint). 297 298 * The normalize_ceiling_entry() function does not muck with the end 299 of the path it accepts, and the real world callers do rely on that, 300 but a test insisted that the function drops a trailing slash. 301 (merge b2a7123 rd/test-path-utils later to maint). 302 303 * A test for interaction between untracked cache and sparse checkout 304 added in Git 2.5 days were flaky. 305 (merge 9b680fb dt/t7063-fix-flaky-test later to maint). 306 307 * A couple of commands still showed "[options]" in their usage string 308 to note where options should come on their command line, but we 309 spell that "[<options>]" in most places these days. 310 (merge d96a031 rt/placeholder-in-usage later to maint). 311 312 * The synopsis text and the usage string of subcommands that read 313 list of things from the standard input are often shown as if they 314 only take input from a file on a filesystem, which was misleading. 315 (merge 33e8fc8 jc/usage-stdin later to maint). 316 317 * "git am -3" had a small regression where it is aborted in its error 318 handling codepath when underlying merge-recursive failed in certain 319 ways, as it assumed that the internal call to merge-recursive will 320 never die, which is not the case (yet). 321 (merge c63d4b2 jc/am-3-fallback-regression-fix later to maint). 322 323 * The linkage order of libraries was wrong in places around libcurl. 324 (merge 7e91e8d rp/link-curl-before-ssl later to maint). 325 326 * The name-hash subsystem that is used to cope with case insensitive 327 filesystems keeps track of directories and their on-filesystem 328 cases for all the paths in the index by holding a pointer to a 329 randomly chosen cache entry that is inside the directory (for its 330 ce->ce_name component). This pointer was not updated even when the 331 cache entry was removed from the index, leading to use after free. 332 This was fixed by recording the path for each directory instead of 333 borrowing cache entries and restructuring the API somewhat. 334 (merge 41284eb dt/name-hash-dir-entry-fix later to maint). 335 336 * "git merge-file" tried to signal how many conflicts it found, which 337 obviously would not work well when there are too many of them. 338 (merge e34f802 jk/merge-file-exit-code later to maint). 339 340 * The error message from "git blame --contents --reverse" incorrectly 341 talked about "--contents --children". 342 (merge 9526197 mk/blame-error-message later to maint). 343 344 * "git imap-send" did not compile well with older version of cURL library. 345 (merge 71d9257 js/imap-send-curl-compilation-fix later to maint). 346 347 * Merging a branch that removes a path and another that changes the 348 mode bits on the same path should have conflicted at the path, but 349 it didn't and silently favoured the removal. 350 (merge 72fac66 jk/delete-modechange-conflict later to maint). 351 352 * "git --literal-pathspecs add -u/-A" without any command line 353 argument misbehaved ever since Git 2.0. 354 (merge 29abb33 jc/add-u-A-default-to-top later to maint). 355 356 * "git daemon" uses "run_command()" without "finish_command()", so it 357 needs to release resources itself, which it forgot to do. 358 (merge b1b49ff rs/daemon-plug-child-leak later to maint). 359 360 * "git status --branch --short" accessed beyond the constant string 361 "HEAD", which has been corrected. 362 (merge c72b49d rs/wt-status-detached-branch-fix later to maint). 363 364 * We peek objects from submodule's object store by linking it to the 365 list of alternate object databases, but the code to do so forgot to 366 correctly initialize the list. 367 (merge 9a6e4f0 jk/initialization-fix-to-add-submodule-odb later to maint). 368 369 * The code to prepare the working tree side of temporary directory 370 for the "dir-diff" feature forgot that symbolic links need not be 371 copied (or symlinked) to the temporary area, as the code already 372 special cases and overwrites them. Besides, it was wrong to try 373 computing the object name of the target of symbolic link, which may 374 not even exist or may be a directory. 375 (merge cfe2d4b da/difftool later to maint). 376 377 * A Range: request can be responded with a full response and when 378 asked properly libcurl knows how to strip the result down to the 379 requested range. However, we were hand-crafting a range request 380 and it did not kick in. 381 382 * Having a leftover .idx file without corresponding .pack file in 383 the repository hurts performance; "git gc" learned to prune them. 384 (merge 478f34d dk/gc-idx-wo-pack later to maint). 385 386 * Apple's common crypto implementation of SHA1_Update() does not take 387 more than 4GB at a time, and we now have a compile-time workaround 388 for it. 389 (merge 001fd7a ad/sha1-update-chunked later to maint). 390 391 * Produce correct "dirty" marker for shell prompts, even when we 392 are on an orphan or an unborn branch. 393 (merge c26f70c sg/bash-prompt-dirty-orphan later to maint). 394 395 * Code clean-up, minor fixes etc. 396 (merge 15ed07d jc/rerere later to maint). 397 (merge e7a7401 pt/pull-builtin later to maint). 398 (merge 29bc480 nd/ls-remote-does-not-have-u-option later to maint). 399 (merge be510e0 jk/asciidoctor-section-heading-markup-fix later to maint). 400 (merge 83e6bda tk/typofix-connect-unknown-proto-error later to maint). 401 (merge a43eb67 tk/doc-interpret-trailers-grammo later to maint). 402 (merge ba128e2 es/worktree-add-cleanup later to maint). 403 (merge 44cd91e cc/quote-comments later to maint). 404 (merge 147875f sb/submodule-config-parse later to maint). 405 (merge ae9f274 es/worktree-add later to maint). 406 (merge 3b19dba jc/em-dash-in-doc later to maint). 407 (merge f3f38c7 jc/everyday-markup later to maint). 408 (merge 77d5f71 xf/user-manual-markup later to maint). 409 (merge b2af482 xf/user-manual-ff later to maint). 410 (merge e510ab8 rs/pop-commit later to maint). 411 (merge fdcdb77 js/misc-fixes later to maint). 412 (merge c949b00 rs/show-branch-argv-array later to maint).