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diff --git a/Documentation/RelNotes/2.8.0.txt b/Documentation/RelNotes/2.8.0.txt new file mode 100644 index 0000000000..17e904cf4d --- /dev/null +++ b/Documentation/RelNotes/2.8.0.txt @@ -0,0 +1,275 @@ +Git 2.8 Release Notes +===================== + +Updates since v2.7 +------------------ + +UI, Workflows & Features + + * "branch --delete" has "branch -d" but "push --delete" does not. + + * "git blame" learned to produce the progress eye-candy when it takes + too much time before emitting the first line of the result. + + * "git grep" can now be configured (or told from the command line) + how many threads to use when searching in the working tree files. + + * Some "git notes" operations, e.g. "git log --notes=<note>", should + be able to read notes from any tree-ish that is shaped like a notes + tree, but the notes infrastructure required that the argument must + be a ref under refs/notes/. Loosen it to require a valid ref only + when the operation would update the notes (in which case we must + have a place to store the updated notes tree, iow, a ref). + + * "git grep" by default does not fall back to its "--no-index" + behaviour outside a directory under Git's control (otherwise the + user may by mistake end up running a huge recursive search); with a + new configuration (set in $HOME/.gitconfig--by definition this + cannot be set in the config file per project), this safety can be + disabled. + + * "git pull --rebase" has been extended to allow invoking + "rebase -i". + + * "git p4" learned to cope with the type of a file getting changed. + + * "git format-patch" learned to notice format.outputDirectory + configuration variable. This allows "-o <dir>" option to be + omitted on the command line if you always use the same directory in + your workflow. + + * "interpret-trailers" has been taught to optionally update a file in + place, instead of always writing the result to the standard output. + + * Many commands that read files that are expected to contain text + that is generated (or can be edited) by the end user to control + their behaviour (e.g. "git grep -f <filename>") have been updated + to be more tolerant to lines that are terminated with CRLF (they + used to treat such a line to contain payload that ends with CR, + which is usually not what the users expect). + + * "git notes merge" used to limit the source of the merged notes tree + to somewhere under refs/notes/ hierarchy, which was too limiting + when inventing a workflow to exchange notes with remote + repositories using remote-tracking notes trees (located in e.g. + refs/remote-notes/ or somesuch). + + * "git ls-files" learned a new "--eol" option to help diagnose + end-of-line problems. + + * "ls-remote" learned an option to show which branch the remote + repository advertises as its primary by pointing its HEAD at. + + * New http.proxyAuthMethod configuration variable can be used to + specify what authentication method to use, as a way to work around + proxies that do not give error response expected by libcurl when + CURLAUTH_ANY is used. Also, the codepath for proxy authentication + has been taught to use credential API to store the authentication + material in user's keyrings. + + * Update the untracked cache subsystem and change its primary UI from + "git update-index" to "git config". + + * There were a few "now I am doing this thing" progress messages in + the TCP connection code that can be triggered by setting a verbose + option internally in the code, but "git fetch -v" and friends never + passed the verbose option down to that codepath. + + * Clean/smudge filters defined in a configuration file of lower + precedence can now be overridden to be a pass-through no-op by + setting the variable to an empty string. + + * A new "<branch>^{/!-<pattern>}" notation can be used to name a + commit that is reachable from <branch> that does not match the + given <pattern>. + + +Performance, Internal Implementation, Development Support etc. + + * Add a framework to spawn a group of processes in parallel, and use + it to run "git fetch --recurse-submodules" in parallel. + + * A slight update to the Makefile to mark "phoney" targets + as such correctly. + + * In-core storage of the reverse index for .pack files (which lets + you go from a pack offset to an object name) has been streamlined. + + * d95138e6 (setup: set env $GIT_WORK_TREE when work tree is set, like + $GIT_DIR, 2015-06-26) attempted to work around a glitch in alias + handling by overwriting GIT_WORK_TREE environment variable to + affect subprocesses when set_git_work_tree() gets called, which + resulted in a rather unpleasant regression to "clone" and "init". + Try to address the same issue by always restoring the environment + and respawning the real underlying command when handling alias. + + * The low-level code that is used to create symbolic references has + been updated to share more code with the code that deals with + normal references. + + * strbuf_getline() and friends have been redefined to make it easier + to identify which callsite of (new) strbuf_getline_lf() should + allow and silently ignore carriage-return at the end of the line to + help users on DOSsy systems. + + * "git shortlog" used to accumulate various pieces of information + regardless of what was asked to be shown in the final output. It + has been optimized by noticing what need not to be collected + (e.g. there is no need to collect the log messages when showing + only the number of changes). + + * "git checkout $branch" (and other operations that share the same + underlying machinery) has been optimized. + + * Automated tests in Travis CI environment has been optimized by + persisting runtime statistics of previous "prove" run, executing + tests that take longer before other ones; this reduces the total + wallclock time. + + +Also contains various documentation updates and code clean-ups. + + +Fixes since v2.7 +---------------- + +Unless otherwise noted, all the fixes since v2.7 in the maintenance +track are contained in this release (see the maintenance releases' +notes for details). + + * An earlier change in 2.5.x-era broke users' hooks and aliases by + exporting GIT_WORK_TREE to point at the root of the working tree, + interfering when they tried to use a different working tree without + setting GIT_WORK_TREE environment themselves. + (merge df1e6ea nd/stop-setenv-work-tree later to maint). + + * The "exclude_list" structure has the usual "alloc, nr" pair of + fields to be used by ALLOC_GROW(), but clear_exclude_list() forgot + to reset 'alloc' to 0 when it cleared 'nr' to discard the managed + array. + (merge 2653a8c nd/dir-exclude-cleanup later to maint). + + * Paths that have been told the index about with "add -N" are not + quite yet in the index, but a few commands behaved as if they + already are in a harmful way. + (merge 4d55200 nd/ita-cleanup later to maint). + + * "git send-email" was confused by escaped quotes stored in the alias + files saved by "mutt", which has been corrected. + (merge 2c510f2 ew/send-email-mutt-alias-fix later to maint). + + * A few unportable C construct have been spotted by clang compiler + and have been fixed. + (merge a0df2e5 jk/clang-pedantic later to maint). + + * The documentation has been updated to hint the connection between + the '--signoff' option and DCO. + (merge b2c150d dw/signoff-doc later to maint). + + * "git reflog" incorrectly assumed that all objects that used to be + at the tip of a ref must be commits, which caused it to segfault. + (merge aecad37 dk/reflog-walk-with-non-commit later to maint). + + * The ignore mechanism saw a few regressions around untracked file + listing and sparse checkout selection areas in 2.7.0; the change + that is responsible for the regression has been reverted. + (merge 8c72236 nd/exclusion-regression-fix later to maint). + + * Some codepaths used fopen(3) when opening a fixed path in $GIT_DIR + (e.g. COMMIT_EDITMSG) that is meant to be left after the command is + done. This however did not work well if the repository is set to + be shared with core.sharedRepository and the umask of the previous + user is tighter. They have been made to work better by calling + unlink(2) and retrying after fopen(3) fails with EPERM. + (merge ea56518 js/fopen-harder later to maint). + + * Asking gitweb for a nonexistent commit left a warning in the server + log. + + Somebody may want to follow this up with an additional test, perhaps? + IIRC, we do test that no Perl warnings are given to the server log, + so this should have been caught if our test coverage were good. + (merge a9eb90a ho/gitweb-squelch-undef-warning later to maint). + + * "git rebase", unlike all other callers of "gc --auto", did not + ignore the exit code from "gc --auto". + (merge 8c24f5b jk/ok-to-fail-gc-auto-in-rebase later to maint). + + * Many codepaths that run "gc --auto" before exiting kept packfiles + mapped and left the file descriptors to them open, which was not + friendly to systems that cannot remove files that are open. They + now close the packs before doing so. + (merge d562102 js/close-packs-before-gc later to maint). + + * A recent optimization to filter-branch in v2.7.0 introduced a + regression when --prune-empty filter is used, which has been + corrected. + (merge 1dc413e jk/filter-branch-no-index later to maint). + + * The description for SANITY prerequisite the test suite uses has + been clarified both in the comment and in the implementation. + (merge 719c3da jk/sanity later to maint). + + * "git tag" started listing a tag "foo" as "tags/foo" when a branch + named "foo" exists in the same repository; remove this unnecessary + disambiguation, which is a regression introduced in v2.7.0. + (merge 0571979 jk/list-tag-2.7-regression later to maint). + + * The way "git svn" uses auth parameter was broken by Subversion + 1.9.0 and later. + (merge 0b66415 ew/svn-1.9.0-auth later to maint). + + * The "split" subcommand of "git subtree" (in contrib/) incorrectly + skipped merges when it shouldn't, which was corrected. + (merge 933cfeb dw/subtree-split-do-not-drop-merge later to maint). + + * A few options of "git diff" did not work well when the command was + run from a subdirectory. + (merge a97262c nd/diff-with-path-params later to maint). + + * The command line completion learned a handful of additional options + and command specific syntax. + (merge fa4b5e3 jk/completion-rebase later to maint). + (merge f7c2e1a pw/completion-show-branch later to maint). + (merge d7d4ca8 pw/completion-stash later to maint). + (merge e6414b4 tb/complete-word-diff-regex later to maint). + + * dirname() emulation has been added, as Msys2 lacks it. + (merge e7d5ce8 js/dirname-basename later to maint). + + * The underlying machinery used by "ls-files -o" and other commands + have been taught not to create empty submodule ref cache for a + directory that is not a submodule. This removes a ton of wasted + CPU cycles. + (merge a2d5156 jk/ref-cache-non-repository-optim later to maint). + + * "git worktree" had a broken code that attempted to auto-fix + possible inconsistency that results from end-users moving a + worktree to different places without telling Git (the original + repository needs to maintain backpointers to its worktrees, but + "mv" run by end-users who are not familiar with that fact will + obviously not adjust them), which actually made things worse + when triggered. + (merge 618244e nd/do-not-move-worktree-manually later to maint). + + * The low-level merge machinery has been taught to use CRLF line + termination when inserting conflict markers to merged contents that + are themselves CRLF line-terminated. + (merge 15980de js/xmerge-marker-eol later to maint). + + * "git push --force-with-lease" has been taught to report if the push + needed to force (or fast-forwarded). + (merge b2e93f8 aw/push-force-with-lease-reporting later to maint). + + * The emulated "yes" command used in our test scripts has been + tweaked not to spend too much time generating unnecessary output + that is not used, to help those who test on Windows where it would + not stop until it fills the pipe buffer due to lack of SIGPIPE. + (merge 6129c93 js/test-lib-windows-emulated-yes later to maint). + + * Other minor clean-ups and documentation updates + (merge 99487cf ss/user-manual later to maint). + (merge e914ef0 ew/for-each-ref-doc later to maint). + (merge 36fc7d8 sg/t6050-failing-editor-test-fix later to maint). + (merge 60253a6 ss/clone-depth-single-doc later to maint). + (merge bd02e97 lv/add-doc-working-tree later to maint). |