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 55 * "git worktree" learned a "list" subcommand. 56 57 * "git clone --dissociate" learned that it can be used even when 58 "--reference" was not used at the same time. 59 60 * "git blame" learnt to take "--first-parent" and "--reverse" at the 61 same time when it makes sense. 62 63 * "git checkout" did not follow the usual "--[no-]progress" 64 convention and implemented only "--quiet" that is essentially 65 a superset of "--no-progress". Extend the command to support the 66 usual "--[no-]progress". 67 68 * The semantics of tranfer.hideRefs configuration variable have been 69 extended to work better with the ref "namespace" feature that lets 70 you throw unrelated bunches of repositories in a single physical 71 repository and virtually serve them as separate ones. 72 73 * send-email config variables whose values are pathnames now go 74 through the ~username/ expansion. 75 76 * bash completion learnt to TAB-complete recipient addresses given 77 to send-email. 78 79 * The credential-cache daemon can be told to ignore SIGHUP to work 80 around issue when running Git from inside emacs. 81 82 83Performance, Internal Implementation, Development Support etc. 84 85 * The infrastructure to rewrite "git submodule" in C is being built 86 incrementally. Let's polish these early parts well enough and make 87 them graduate to 'next' and 'master', so that the more involved 88 follow-up can start cooking on a solid ground. 89 90 * Some features from "git tag -l" and "git branch -l" have been made 91 available to "git for-each-ref" so that eventually the unified 92 implementation can be shared across all three. The version merged 93 to the 'master' branch earlier had a performance regression in "tag 94 --contains", which has since been corrected. 95 96 * Because "test_when_finished" in our test framework queues the 97 clean-up tasks to be done in a shell variable, it should not be 98 used inside a subshell. Add a mechanism to allow 'bash' to catch 99 such uses, and fix the ones that were found. 100 101 * The debugging infrastructure for pkt-line based communication has 102 been improved to mark the side-band communication specifically. 103 104 * Update "git branch" that list existing branches, using the 105 ref-filter API that is shared with "git tag" and "git 106 for-each-ref". 107 108 * The test for various line-ending conversions has been enhanced. 109 110 * A few test scripts around "git p4" have been improved for 111 portability. 112 113 * Many allocations that is manually counted (correctly) that are 114 followed by strcpy/sprintf have been replaced with a less error 115 prone constructs such as xstrfmt. 116 117 * The internal stripspace() function has been moved to where it 118 logically belongs to, i.e. strbuf API, and the command line parser 119 of "git stripspace" has been updated to use the parse_options API. 120 121 * "git am" used to spawn "git mailinfo" via run_command() API once 122 per each patch, but learned to make a direct call to mailinfo() 123 instead. 124 125 * The implementation of "git mailinfo" was refactored so that a 126 mailinfo() function can be directly called from inside a process. 127 128 * With a "debug" helper, debugging of a single "git" invocation in 129 our test scripts has become a lot easier. 130 131 * The "configure" script did not test for -lpthread correctly, which 132 upset some linkers. 133 134 * Cross completed task off of subtree project's todo list. 135 136 * Test cleanups for the subtree project. 137 138 * Clean up style in an ancient test t9300. 139 140 * Work around some test flakiness with p4d. 141 142 * Fsck did not correctly detect a NUL-truncated header in a tag. 143 144 * Use a safer behavior when we hit errors verifying remote certificates. 145 146 * Speed up filter-branch for cases where we only care about rewriting 147 commits, not tree data. 148 149 * The parse-options API has been updated to make "-h" command line 150 option work more consistently in all commands. 151 152 * "git svn rebase/mkdirs" got optimized by keeping track of empty 153 directories better. 154 155 * Fix some racy client/server tests by treating SIGPIPE the same as a 156 normal non-zero exit. 157 158 * The necessary infrastructure to build topics using the free Travis 159 CI has been added. Developers forking from this topic (and enabling 160 Travis) can do their own builds, and we can turn on auto-builds for 161 git/git (including build-status for pull requests that people 162 open). 163 164 165Also contains various documentation updates and code clean-ups. 166 167 168Fixes since v2.6 169---------------- 170 171Unless otherwise noted, all the fixes since v2.6 in the maintenance 172track are contained in this release (see the maintenance releases' 173notes for details). 174 175 * Very small number of options take a parameter that is optional 176 (which is not a great UI element as they can only appear at the end 177 of the command line). Add notice to documentation of each and 178 every one of them. 179 180 * "git blame --first-parent v1.0..v2.0" was not rejected but did not 181 limit the blame to commits on the first parent chain. 182 183 * "git subtree" (in contrib/) now can take whitespaces in the 184 pathnames, not only in the in-tree pathname but the name of the 185 directory that the repository is in. 186 187 * The ssh transport, just like any other transport over the network, 188 did not clear GIT_* environment variables, but it is possible to 189 use SendEnv and AcceptEnv to leak them to the remote invocation of 190 Git, which is not a good idea at all. Explicitly clear them just 191 like we do for the local transport. 192 193 * Correct "git p4 --detect-labels" so that it does not fail to create 194 a tag that points at a commit that is also being imported. 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. 200 201 * Customization to change the behaviour with "make -w" and "make -s" 202 in our Makefile was broken when they were used together. 203 204 * Allocation related functions and stdio are unsafe things to call 205 inside a signal handler, and indeed killing the pager can cause 206 glibc to deadlock waiting on allocation mutex as our signal handler 207 tries to free() some data structures in wait_for_pager(). Reduce 208 these unsafe calls. 209 210 * The way how --ref/--notes to specify the notes tree reference are 211 DWIMmed was not clearly documented. 212 213 * "git gc" used to barf when a symbolic ref has gone dangling 214 (e.g. the branch that used to be your upstream's default when you 215 cloned from it is now gone, and you did "fetch --prune"). 216 217 * "git clone --dissociate" runs a big "git repack" process at the 218 end, and it helps to close file descriptors that are open on the 219 packs and their idx files before doing so on filesystems that 220 cannot remove a file that is still open. 221 222 * Description of the "log.follow" configuration variable in "git log" 223 documentation is now also copied to "git config" documentation. 224 225 * "git rebase -i" had a minor regression recently, which stopped 226 considering a line that begins with an indented '#' in its insn 227 sheet not a comment. Further, the code was still too picky on 228 Windows where CRLF left by the editor is turned into a trailing CR 229 on the line read via the "read" built-in command of bash. Both of 230 these issues are now fixed. 231 232 * After "git checkout --detach", "git status" reported a fairly 233 useless "HEAD detached at HEAD", instead of saying at which exact 234 commit. 235 236 * When "git send-email" wanted to talk over Net::SMTP::SSL, 237 Net::Cmd::datasend() did not like to be fed too many bytes at the 238 same time and failed to send messages. Send the payload one line 239 at a time to work around the problem. 240 241 * When "git am" was rewritten as a built-in, it stopped paying 242 attention to user.signingkey, which was fixed. 243 244 * It was not possible to use a repository-lookalike created by "git 245 worktree add" as a local source of "git clone". 246 247 * On a case insensitive filesystems, setting GIT_WORK_TREE variable 248 using a random cases that does not agree with what the filesystem 249 thinks confused Git that it wasn't inside the working tree. 250 251 * Performance-measurement tests did not work without an installed Git. 252 253 * A test script for the HTTP service had a timing dependent bug, 254 which was fixed. 255 256 * There were some classes of errors that "git fsck" diagnosed to its 257 standard error that did not cause it to exit with non-zero status. 258 259 * Work around "git p4" failing when the P4 depot records the contents 260 in UTF-16 without UTF-16 BOM. 261 262 * When "git gc --auto" is backgrounded, its diagnosis message is 263 lost. Save it to a file in $GIT_DIR and show it next time the "gc 264 --auto" is run. 265 266 * The submodule code has been taught to work better with separate 267 work trees created via "git worktree add". 268 269 * "git gc" is safe to run anytime only because it has the built-in 270 grace period to protect young objects. In order to run with no 271 grace period, the user must make sure that the repository is 272 quiescent. 273 274 * A recent "filter-branch --msg-filter" broke skipping of the commit 275 object header, which is fixed. 276 277 * The normalize_ceiling_entry() function does not muck with the end 278 of the path it accepts, and the real world callers do rely on that, 279 but a test insisted that the function drops a trailing slash. 280 281 * A test for interaction between untracked cache and sparse checkout 282 added in Git 2.5 days were flaky. 283 284 * A couple of commands still showed "[options]" in their usage string 285 to note where options should come on their command line, but we 286 spell that "[<options>]" in most places these days. 287 288 * The synopsis text and the usage string of subcommands that read 289 list of things from the standard input are often shown as if they 290 only take input from a file on a filesystem, which was misleading. 291 292 * "git am -3" had a small regression where it is aborted in its error 293 handling codepath when underlying merge-recursive failed in certain 294 ways, as it assumed that the internal call to merge-recursive will 295 never die, which is not the case (yet). 296 297 * The linkage order of libraries was wrong in places around libcurl. 298 299 * The name-hash subsystem that is used to cope with case insensitive 300 filesystems keeps track of directories and their on-filesystem 301 cases for all the paths in the index by holding a pointer to a 302 randomly chosen cache entry that is inside the directory (for its 303 ce->ce_name component). This pointer was not updated even when the 304 cache entry was removed from the index, leading to use after free. 305 This was fixed by recording the path for each directory instead of 306 borrowing cache entries and restructuring the API somewhat. 307 308 * "git merge-file" tried to signal how many conflicts it found, which 309 obviously would not work well when there are too many of them. 310 311 * The error message from "git blame --contents --reverse" incorrectly 312 talked about "--contents --children". 313 314 * "git imap-send" did not compile well with older version of cURL library. 315 316 * Merging a branch that removes a path and another that changes the 317 mode bits on the same path should have conflicted at the path, but 318 it didn't and silently favoured the removal. 319 320 * "git --literal-pathspecs add -u/-A" without any command line 321 argument misbehaved ever since Git 2.0. 322 323 * "git daemon" uses "run_command()" without "finish_command()", so it 324 needs to release resources itself, which it forgot to do. 325 326 * "git status --branch --short" accessed beyond the constant string 327 "HEAD", which has been corrected. 328 329 * We peek objects from submodule's object store by linking it to the 330 list of alternate object databases, but the code to do so forgot to 331 correctly initialize the list. 332 333 * The code to prepare the working tree side of temporary directory 334 for the "dir-diff" feature forgot that symbolic links need not be 335 copied (or symlinked) to the temporary area, as the code already 336 special cases and overwrites them. Besides, it was wrong to try 337 computing the object name of the target of symbolic link, which may 338 not even exist or may be a directory. 339 340 * A Range: request can be responded with a full response and when 341 asked properly libcurl knows how to strip the result down to the 342 requested range. However, we were hand-crafting a range request 343 and it did not kick in. 344 345 * Having a leftover .idx file without corresponding .pack file in 346 the repository hurts performance; "git gc" learned to prune them. 347 348 * Apple's common crypto implementation of SHA1_Update() does not take 349 more than 4GB at a time, and we now have a compile-time workaround 350 for it. 351 352 * Produce correct "dirty" marker for shell prompts, even when we 353 are on an orphan or an unborn branch. 354 355 * A build without NO_IPv6 used to use gethostbyname() when guessing 356 user's hostname, instead of getaddrinfo() that is used in other 357 codepaths in such a build. 358 359 * The exit code of git-fsck did not reflect some types of errors 360 found in packed objects, which has been corrected. 361 362 * The helper used to iterate over loose object directories to prune 363 stale objects did not closedir() immediately when it is done with a 364 directory--a callback such as the one used for "git prune" may want 365 to do rmdir(), but it would fail on open directory on platforms 366 such as WinXP. 367 368 * "git p4" used to import Perforce CLs that touch only paths outside 369 the client spec as empty commits. It has been corrected to ignore 370 them instead, with a new configuration git-p4.keepEmptyCommits as a 371 backward compatibility knob. 372 373 * Code clean-up, minor fixes etc.