1Git v2.2 Release Notes 2====================== 3 4Updates since v2.1 5------------------ 6 7Ports 8 9 * Building on older MacOS X systems automatically sets 10 the necessary NO_APPLE_COMMON_CRYPTO build-time option. 11 12 * The support to build with NO_PTHREADS has been resurrected. 13 14 * Compilation options has been updated a bit to support z/OS port 15 better. 16 17 18UI, Workflows & Features 19 20 * "git archive" learned to filter what gets archived with pathspec. 21 22 * "git config --edit --global" starts from a skeletal per-user 23 configuration file contents, instead of a total blank, when the 24 user does not already have any. This immediately reduces the 25 need for a later "Have you forgotten setting core.user?" and we 26 can add more to the template as we gain more experience. 27 28 * "git stash list -p" used to be almost always a no-op because each 29 stash entry is represented as a merge commit. It learned to show 30 the difference between the base commit version and the working tree 31 version, which is in line with what "git show" gives. 32 33 * Sometimes users want to report a bug they experience on their 34 repository, but they are not at liberty to share the contents of 35 the repository. "fast-export" was taught an "--anonymize" option 36 to replace blob contents, names of people and paths and log 37 messages with bland and simple strings to help them. 38 39 * "git difftool" learned an option to stop feeding paths to the 40 diff backend when it exits with a non-zero status. 41 42 * "git grep" allows to paint (or not paint) partial matches on 43 context lines when showing "grep -C<num>" output in color. 44 45 * "log --date=iso" uses a slight variant of ISO 8601 format that is 46 made more human readable. A new "--date=iso-strict" option gives 47 datetime output that is more strictly conformant. 48 49 * The logic "git prune" uses is more resilient against various corner 50 cases. 51 52 * A broken reimplementation of Git could write an invalid index that 53 records both stage #0 and higher stage entries for the same path. 54 We now notice and reject such an index, as there is no sensible 55 fallback (we do not know if the broken tool wanted to resolve and 56 forgot to remove higher stage entries, or if it wanted to unresolve 57 and forgot to remove the stage#0 entry). 58 59 * The temporary files "git mergetool" uses are named to avoid too 60 many dots in them (e.g. a temporary file for "hello.c" used to be 61 named e.g. "hello.BASE.4321.c" but now uses underscore instead, 62 e.g. "hello_BASE_4321.c"). 63 64 * The temporary files "git mergetools" uses can be placed in a newly 65 created temporary directory, instead of the current directory, by 66 setting the mergetool.writeToTemp configuration variable. 67 68 * "git mergetool" understands "--tool bc" now, as version 4 of 69 BeyondCompare can be driven the same way as its version 3 and it 70 feels awkward to say "--tool bc3". 71 72 * The "pre-receive" and "post-receive" hooks are no longer required 73 to consume their input fully (not following this requirement used 74 to result in intermittent errors in "git push"). 75 76 * The pretty-format specifier "%d", which expanded to " (tagname)" 77 for a tagged commit, gained a cousin "%D" that just gives the 78 "tagname" without frills. 79 80 * "git push" learned "--signed" push, that allows a push (i.e. 81 request to update the refs on the other side to point at a new 82 history, together with the transmission of necessary objects) to be 83 signed, so that it can be verified and audited, using the GPG 84 signature of the person who pushed, that the tips of branches at a 85 public repository really point the commits the pusher wanted to, 86 without having to "trust" the server. 87 88 * "git interpret-trailers" is a new filter to programmatically edit 89 the tail end of the commit log messages. 90 91 * "git help everyday" shows the "Everyday Git in 20 commands or so" 92 document, whose contents have been updated to more modern Git 93 practice. 94 95 * On the "git svn" front, work to reduce memory consumption and 96 to improve handling of mergeinfo progresses. 97 98 99Performance, Internal Implementation, etc. 100 101 * The API to manipulate the "refs" has been restructured to make it 102 more transactional, with the eventual goal to allow all-or-none 103 atomic updates and migrating the storage to something other than 104 the traditional filesystem based one (e.g. databases). 105 106 * The lockfile API and its users have been cleaned up. 107 108 * We no longer attempt to keep track of individual dependencies to 109 the header files in the build procedure, relying on automated 110 dependency generation support from modern compilers. 111 112 * In tests, we have been using NOT_{MINGW,CYGWIN} test prerequisites 113 long before negated prerequisites e.g. !MINGW were invented. 114 The former has been converted to the latter to avoid confusion. 115 116 * Looking up remotes configuration in a repository with very many 117 remotes defined has been optimized. 118 119 * There are cases where you lock and open to write a file, close it 120 to show the updated contents to external processes, and then have 121 to update the file again while still holding the lock, but the 122 lockfile API lacked support for such an access pattern. 123 124 * The API to allocate the structure to keep track of commit 125 decoration has been updated to make it less cumbersome to use. 126 127 * An in-core caching layer to let us avoid reading the same 128 configuration files number of times has been added. A few commands 129 have been converted to use this subsystem. 130 131 * Various code paths have been cleaned up and simplified by using 132 "strbuf", "starts_with()", and "skip_prefix()" APIs more. 133 134 * A few codepaths that died when large blobs that would not fit in 135 core are involved in their operation have been taught to punt 136 instead, by e.g. marking too large a blob as not to be diffed. 137 138 * A few more code paths in "commit" and "checkout" have been taught 139 to repopulate the cache-tree in the index, to help speed up later 140 "write-tree" (used in "commit") and "diff-index --cached" (used in 141 "status"). 142 143 * A common programming mistake to assign the same short option name 144 to two separate options is detected by parse_options() API to help 145 developers. 146 147 * The code path to write out the packed-refs file has been optimized, 148 which especially matters in a repository with a large number of 149 refs. 150 151 * The check to see if a ref $F can be created by making sure no 152 existing ref has $F/ as its prefix has been optimized, which 153 especially matters in a repository with a large number of existing 154 refs. 155 156 * "git fsck" was taught to check contents of tag objects a bit more. 157 158 * "git hash-object" was taught a "--literally" option to help 159 debugging. 160 161 * When running a required clean filter, we do not have to mmap the 162 original before feeding the filter. Instead, stream the file 163 contents directly to the filter and process its output. 164 165 * The scripts in the test suite can be run with "-x" option to show 166 a shell-trace of each command run in them. 167 168 * The "run-command" API learned to manage the argv and environment 169 array for child process, alleviating the need for the callers to 170 allocate and deallocate them. 171 172 * Some people use AsciiDoctor, instead of AsciiDoc, to format our 173 documentation set; the documentation has been adjusted, as 174 AsciiDoctor is pickier than AsciiDoc in its input mark-up. 175 176 177Also contains various documentation updates and code clean-ups. 178 179 180Fixes since v2.1 181---------------- 182 183Unless otherwise noted, all the fixes since v2.1 in the maintenance 184track are contained in this release (see the maintenance releases' 185notes for details). 186 187 * "git log --pretty/format=" with an empty format string did not 188 mean the more obvious "No output whatsoever" but "Use default 189 format", which was counterintuitive. 190 191 * "git -c section.var command" and "git -c section.var= command" 192 should pass the configuration differently (the former should be a 193 boolean true, the latter should be an empty string). 194 195 * Applying a patch not generated by Git in a subdirectory used to 196 check the whitespace breakage using the attributes for incorrect 197 paths. Also whitespace checks were performed even for paths 198 excluded via "git apply --exclude=<path>" mechanism. 199 200 * "git bundle create" with date-range specification were meant to 201 exclude tags outside the range, but it didn't. 202 203 * "git add x" where x that used to be a directory has become a 204 symbolic link to a directory misbehaved. 205 206 * The prompt script checked $GIT_DIR/ref/stash file to see if there 207 is a stash, which was a no-no. 208 209 * Pack-protocol documentation had a minor typo. 210 211 * "git checkout -m" did not switch to another branch while carrying 212 the local changes forward when a path was deleted from the index. 213 214 * "git daemon" (with NO_IPV6 build configuration) used to incorrectly 215 use the hostname even when gethostbyname() reported that the given 216 hostname is not found. 217 (merge 107efbe rs/daemon-fixes later to maint). 218 219 * With sufficiently long refnames, "git fast-import" could have 220 overflown an on-stack buffer. 221 222 * After "pack-refs --prune" packed refs at the top-level, it failed 223 to prune them. 224 225 * Progress output from "git gc --auto" was visible in "git fetch -q". 226 227 * We used to pass -1000 to poll(2), expecting it to also mean "no 228 timeout", which should be spelled as -1. 229 230 * "git rebase" documentation was unclear that it is required to 231 specify on what <upstream> the rebase is to be done when telling it 232 to first check out <branch>. 233 (merge 95c6826 so/rebase-doc later to maint). 234 235 * "git push" over HTTP transport had an artificial limit on number of 236 refs that can be pushed imposed by the command line length. 237 (merge 26be19b jk/send-pack-many-refspecs later to maint). 238 239 * When receiving an invalid pack stream that records the same object 240 twice, multiple threads got confused due to a race. 241 (merge ab791dd jk/index-pack-threading-races later to maint). 242 243 * An attempt to remove the entire tree in the "git fast-import" input 244 stream caused it to misbehave. 245 (merge 2668d69 mb/fast-import-delete-root later to maint). 246 247 * Reachability check (used in "git prune" and friends) did not add a 248 detached HEAD as a starting point to traverse objects still in use. 249 (merge c40fdd0 mk/reachable-protect-detached-head later to maint). 250 251 * "git config --add section.var val" used to lose existing 252 section.var whose value was an empty string. 253 (merge c1063be ta/config-add-to-empty-or-true-fix later to maint). 254 255 * "git fsck" failed to report that it found corrupt objects via its 256 exit status in some cases. 257 (merge 30d1038 jk/fsck-exit-code-fix later to maint). 258 259 * Use of "--verbose" option used to break "git branch --merged". 260 (merge 12994dd jk/maint-branch-verbose-merged later to maint). 261 262 * Some MUAs mangled a line in a message that begins with "From " to 263 ">From " when writing to a mailbox file and feeding such an input 264 to "git am" used to lose such a line. 265 (merge 85de86a jk/mbox-from-line later to maint). 266 267 * "rev-parse --verify --quiet $name" is meant to quietly exit with a 268 non-zero status when $name is not a valid object name, but still 269 gave error messages in some cases. 270 271 * A handful of C source files have been updated to include 272 "git-compat-util.h" as the first thing, to conform better to our 273 coding guidelines. 274 (merge 1c4b660 da/include-compat-util-first-in-c later to maint). 275 276 * t7004 test, which tried to run Git with small stack space, has been 277 updated to give a bit larger stack to avoid false breakage on some 278 platforms. 279 (merge b9a1907 sk/tag-contains-wo-recursion later to maint). 280 281 * A few documentation pages had example sections marked up not quite 282 correctly, which passed AsciiDoc but failed with AsciiDoctor. 283 (merge c30c43c bc/asciidoc-pretty-formats-fix later to maint). 284 (merge f8a48af bc/asciidoc later to maint). 285 286 * "gitweb" used deprecated CGI::startfrom, which was removed from 287 CGI.pm as of 4.04; use CGI::start_from instead. 288 (merge 4750f4b rm/gitweb-start-form later to maint). 289 290 * Newer versions of 'meld' breaks the auto-detection we use to see if 291 they are new enough to support the `--output` option. 292 (merge b12d045 da/mergetool-meld later to maint). 293 294 * "git pack-objects" forgot to disable the codepath to generate 295 object reachability bitmap when it needs to split the resulting 296 pack. 297 (merge 2113471 jk/pack-objects-no-bitmap-when-splitting later to maint).