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Diffstat (limited to 'Documentation/RelNotes/2.14.0.txt')
| -rw-r--r-- | Documentation/RelNotes/2.14.0.txt | 293 |
1 files changed, 252 insertions, 41 deletions
diff --git a/Documentation/RelNotes/2.14.0.txt b/Documentation/RelNotes/2.14.0.txt index e4ca72e50e..4246c68ff5 100644 --- a/Documentation/RelNotes/2.14.0.txt +++ b/Documentation/RelNotes/2.14.0.txt @@ -1,7 +1,7 @@ Git 2.14 Release Notes ====================== -Backward compatibility notes. +Backward compatibility notes and other notable changes. * Use of an empty string as a pathspec element that is used for 'everything matches' is still warned and Git asks users to use a @@ -22,6 +22,12 @@ Backward compatibility notes. diff output has finished, and the "indent heuristics" has now become the default. + * Git can now be built with PCRE v2 instead of v1 of the PCRE + library. Replace USE_LIBPCRE=YesPlease with USE_LIBPCRE2=YesPlease + in existing build scripts to build against the new version. As the + upstream PCRE maintainer has abandoned v1 maintenance for all but + the most critical bug fixes, use of v2 is recommended. + Updates since v2.13 ------------------- @@ -38,35 +44,84 @@ UI, Workflows & Features * "git archive --format=zip" learned to use zip64 extension when necessary to go beyond the 4GB limit. - (merge 867e40ff3a rs/large-zip later to maint). * "git reset" learned "--recurse-submodules" option. * "git diff --submodule=diff" now recurses into nested submodules. - (merge 5a5221427c jk/diff-submodule-diff-inline later to maint). * "git repack" learned to accept the --threads=<n> option and pass it to pack-objects. * "git send-email" learned to run sendemail-validate hook to inspect and reject a message before sending it out. - (merge 177409e589 jt/send-email-validate-hook later to maint). * There is no good reason why "git fetch $there $sha1" should fail when the $sha1 names an object at the tip of an advertised ref, even when the other side hasn't enabled allowTipSHA1InWant. - * The recently introduced "[includeIf "gitdir:$dir"] path=..." - mechansim has further been taught to take symlinks into account. - The directory "$dir" specified in "gitdir:$dir" may be a symlink to - a real location, not something that $(getcwd) may return. In such - a case, a realpath of "$dir" is compared with the real path of the - current repository to determine if the contents from the named path - should be included. - - * Make the "indent" heuristics the default in "diff" and diff.indentHeuristics - configuration variable an escape hatch for those who do no want it. - + * The "[includeIf "gitdir:$dir"] path=..." mechanism introduced in + 2.13.0 would canonicalize the path of the gitdir being matched, + and did not match e.g. "gitdir:~/work/*" against a repo in + "~/work/main" if "~/work" was a symlink to "/mnt/storage/work". + Now we match both the resolved canonical path and what "pwd" would + show. The include will happen if either one matches. + + * The "indent" heuristics is now the default in "diff". The + diff.indentHeuristic configuration variable can be set to "false" + for those who do not want it. + + * Many commands learned to pay attention to submodule.recurse + configuration. + + * The convention for a command line is to follow "git cmdname + --options" with revisions followed by an optional "--" + disambiguator and then finally pathspecs. When "--" is not there, + we make sure early ones are all interpretable as revs (and do not + look like paths) and later ones are the other way around. A + pathspec with "magic" (e.g. ":/p/a/t/h" that matches p/a/t/h from + the top-level of the working tree, no matter what subdirectory you + are working from) are conservatively judged as "not a path", which + required disambiguation more often. The command line parser + learned to say "it's a pathspec" a bit more often when the syntax + looks like so. + + * Update "perl-compatible regular expression" support to enable JIT + and also allow linking with the newer PCRE v2 library. + + * "filter-branch" learned a pseudo filter "--setup" that can be used + to define common functions/variables that can be used by other + filters. + + * Using "git add d/i/r" when d/i/r is the top of the working tree of + a separate repository would create a gitlink in the index, which + would appear as a not-quite-initialized submodule to others. We + learned to give warnings when this happens. + + * "git status" learned to optionally give how many stash entries there + are in its output. + + * "git status" has long shown essentially the same message as "git + commit"; the message it gives while preparing for the root commit, + i.e. "Initial commit", was hard to understand for some new users. + Now it says "No commits yet" to stress more on the current status + (rather than the commit the user is preparing for, which is more in + line with the focus of "git commit"). + + * "git send-email" now has --batch-size and --relogin-delay options + which can be used to overcome limitations on SMTP servers that + restrict on how many of e-mails can be sent in a single session. + + * An old message shown in the commit log template was removed, as it + has outlived its usefulness. + + * "git pull --rebase --recurse-submodules" learns to rebase the + branch in the submodules to an updated base. + + * "git log" learned -P as a synonym for --perl-regexp, "git grep" + already had such a synonym. + + * "git log" didn't understand --regexp-ignore-case when combined with + --perl-regexp. This has been fixed. Performance, Internal Implementation, Development Support etc. @@ -76,7 +131,6 @@ Performance, Internal Implementation, Development Support etc. * Code to update the cache-tree has been tightened so that we won't accidentally write out any 0{40} entry in the tree object. - (merge a96d3cc3f6 jk/no-null-sha1-in-cache-tree later to maint). * Attempt to allow us notice "fishy" situation where we fail to remove the temporary directory used during the test. @@ -99,14 +153,11 @@ Performance, Internal Implementation, Development Support etc. * Simplify parse_pathspec() codepath and stop it from looking at the default in-core index. - (merge 08de9151a8 bw/pathspec-sans-the-index later to maint). * Add perf-test for wildmatch. - (merge 62ca75a6b9 ab/perf-wildmatch later to maint). * Code from "conversion using external process" codepath has been extracted to a separate sub-process.[ch] module. - (merge 4f2a2e9f0e bp/sub-process-convert-filter later to maint). * When "git checkout", "git merge", etc. manipulates the in-core index, various pieces of information in the index extensions are @@ -117,7 +168,6 @@ Performance, Internal Implementation, Development Support etc. cache is properly invalidated). * The internal implementation of "git grep" has seen some clean-up. - (merge 8df4c2953f ab/grep-preparatory-cleanup later to maint). * Update the C style recommendation for notes for translators, as recent versions of gettext tools can work with our style of @@ -129,6 +179,83 @@ Performance, Internal Implementation, Development Support etc. * The internal logic used in "git blame" has been libified to make it easier to use by cgit. + * Our code often opens a path to an optional file, to work on its + contents when we can successfully open it. We can ignore a failure + to open if such an optional file does not exist, but we do want to + report a failure in opening for other reasons (e.g. we got an I/O + error, or the file is there, but we lack the permission to open). + + The exact errors we need to ignore are ENOENT (obviously) and + ENOTDIR (less obvious). Instead of repeating comparison of errno + with these two constants, introduce a helper function to do so. + + * We often try to open a file for reading whose existence is + optional, and silently ignore errors from open/fopen; report such + errors if they are not due to missing files. + + * When an existing repository is used for t/perf testing, we first + create bit-for-bit copy of it, which may grab a transient state of + the repository and freeze it into the repository used for testing, + which then may cause Git operations to fail. Single out "the index + being locked" case and forcibly drop the lock from the copy. + + * Three instances of the same helper function have been consolidated + to one. + + * "fast-import" uses a default pack chain depth that is consistent + with other parts of the system. + + * A new test to show the interaction between the pattern [^a-z] + (which matches '/') and a slash in a path has been added. The + pattern should not match the slash with "pathmatch", but should + with "wildmatch". + + * The 'diff-highlight' program (in contrib/) has been restructured + for easier reuse by an external project 'diff-so-fancy'. + + * A common pattern to free a piece of memory and assign NULL to the + pointer that used to point at it has been replaced with a new + FREE_AND_NULL() macro. + + * Traditionally, the default die() routine had a code to prevent it + from getting called multiple times, which interacted badly when a + threaded program used it (one downside is that the real error may + be hidden and instead the only error message given to the user may + end up being "die recursion detected", which is not very useful). + + * Introduce a "repository" object to eventually make it easier to + work in multiple repositories (the primary focus is to work with + the superproject and its submodules) in a single process. + + * Optimize "what are the object names already taken in an alternate + object database?" query that is used to derive the length of prefix + an object name is uniquely abbreviated to. + + * The hashmap API has been updated so that data to customize the + behaviour of the comparison function can be specified at the time a + hashmap is initialized. + + * The "collision detecting" SHA-1 implementation shipped with 2.13 is + now integrated into git.git as a submodule (the first submodule to + ship with git.git). Clone git.git with --recurse-submodules to get + it. For now a non-submodule copy of the same code is also shipped + as part of the tree. + + * A recent update made it easier to use "-fsanitize=" option while + compiling but supported only one sanitize option. Allow more than + one to be combined, joined with a comma, like "make SANITIZE=foo,bar". + + * Use "p4 -G" to make "p4 changes" output more Python-friendly + to parse. + + * We started using "%" PRItime, imitating "%" PRIuMAX and friends, as + a way to format the internal timestamp value, but this does not + play well with gettext(1) i18n framework, and causes "make pot" + that is run by the l10n coordinator to create a broken po/git.pot + file. This is a possible workaround for that problem. + + * It turns out that Cygwin also needs the fopen() wrapper that + returns failure when a directory is opened for reading. Also contains various documentation updates and code clean-ups. @@ -176,12 +303,6 @@ notes for details). * "git checkout --recurse-submodules" did not quite work with a submodule that itself has submodules. - (merge 218c883783 sb/checkout-recurse-submodules later to maint). - - * Plug some leaks and updates internal API used to implement the - split index feature to make it easier to avoid such a leak in the - future. - (merge de950c5773 nd/split-index-unshare later to maint). * "pack-objects" can stream a slice of an existing packfile out when the pack bitmap can tell that the reachable objects are all needed @@ -203,7 +324,6 @@ notes for details). checked out with eol=LF even on Windows. * Introduce the BUG() macro to improve die("BUG: ..."). - (merge 3d7dd2d3b6 jk/bug-to-abort later to maint). * Clarify documentation for include.path and includeIf.<condition>.path configuration variables. @@ -245,21 +365,17 @@ notes for details). they were almost never considered. Instead, give them about the same chance to be considered as an annotated tag that is the same age as the underlying commit would. - (merge ef1e74065c jc/name-rev-lw-tag later to maint). * The "run-command" API implementation has been made more robust against dead-locking in a threaded environment. - (merge e3f43ce765 bw/forking-and-threading later to maint). * A recent update to t5545-push-options.sh started skipping all the tests in the script when a web server testing is disabled or unavailable, not just the ones that require a web server. Non HTTP tests have been salvaged to always run in this script. - (merge 2e397e4ddf jc/skip-test-in-the-middle later to maint). * "git send-email" now uses Net::SMTP::SSL, which is obsolete, only when needed. Recent versions of Net::SMTP can do TLS natively. - (merge bfbfc9a953 dk/send-email-avoid-net-smtp-ssl-when-able later to maint). * "foo\bar\baz" in "git fetch foo\bar\baz", even though there is no slashes in it, cannot be a nickname for a remote on Windows, as @@ -269,13 +385,11 @@ notes for details). even though the command should not lose ignored ones without "-x". "git status --ignored" did not list ignored and untracked files without "-uall". These have been corrected. - (merge 6b1db43109 sl/clean-d-ignored-fix later to maint). * The result from "git diff" that compares two blobs, e.g. "git diff $commit1:$path $commit2:$path", used to be shown with the full object name as given on the command line, but it is more natural to use the $path in the output and use it to look up .gitattributes. - (merge 30d005c020 jk/diff-blob later to maint). * The "collision detecting" SHA-1 implementation shipped with 2.13 was quite broken on some big-endian platforms and/or platforms that @@ -291,16 +405,113 @@ notes for details). closed, to help Windows, on which a stale timestamp is reported by fstat() on a file that is opened for writing and data was written but not yet closed. - (merge 9f41c7a6b3 jh/close-index-before-stat later to maint). * "git pull --rebase --autostash" didn't auto-stash when the local history fast-forwards to the upstream. - (merge f15e7cf5cc tb/pull-ff-rebase-autostash later to maint). + + * A flaky test has been corrected. + + * "git $cmd -h" for builtin commands calls the implementation of the + command (i.e. cmd_$cmd() function) without doing any repository + set-up, and the commands that expect RUN_SETUP is done by the Git + potty needs to be prepared to show the help text without barfing. + (merge d691551192 jk/consistent-h later to maint). + + * Help contributors that visit us at GitHub. + + * "git stash push <pathspec>" did not work from a subdirectory at all. + Bugfix for a topic in v2.13 + + * As there is no portable way to pass timezone information to + strftime, some output format from "git log" and friends are + impossible to produce. Teach our own strbuf_addftime to replace %z + and %Z with caller-supplied values to help working around this. + (merge 6eced3ec5e rs/strbuf-addftime-zZ later to maint). + + * "git mergetool" learned to work around a wrapper MacOS X adds + around underlying meld. + + * An example in documentation that does not work in multi worktree + configuration has been corrected. + + * The pretty-format specifiers like '%h', '%t', etc. had an + optimization that no longer works correctly. In preparation/hope + of getting it correctly implemented, first discard the optimization + that is broken. + + * The code to pick up and execute command alias definition from the + configuration used to switch to the top of the working tree and + then come back when the expanded alias was executed, which was + unnecessarilyl complex. Attempt to simplify the logic by using the + early-config mechanism that does not chdir around. + + * Fix configuration codepath to pay proper attention to commondir + that is used in multi-worktree situation, and isolate config API + into its own header file. + (merge dc8441fdb4 bw/config-h later to maint). + + * "git add -p" were updated in 2.12 timeframe to cope with custom + core.commentchar but the implementation was buggy and a + metacharacter like $ and * did not work. + + * A recent regression in "git rebase -i" has been fixed and tests + that would have caught it and others have been added. + + * An unaligned 32-bit access in pack-bitmap code has been corrected. + + * Tighten error checks for invalid "git apply" input. + + * The split index code did not honor core.sharedRepository setting + correctly. + + * The Makefile rule in contrib/subtree for building documentation + learned to honour USE_ASCIIDOCTOR just like the main documentation + set does. + + * Code clean-up to fix possible buffer over-reading. + + * A few tests that tried to verify the contents of push certificates + did not use 'git rev-parse' to formulate the line to look for in + the certificate correctly. + + * Update the character width tables. + + * After "git branch --move" of the currently checked out branch, the + code to walk the reflog of HEAD via "log -g" and friends + incorrectly stopped at the reflog entry that records the renaming + of the branch. + + * The rewrite of "git branch --list" using for-each-ref's internals + that happened in v2.13 regressed its handling of color.branch.local; + this has been fixed. + + * The build procedure has been improved to allow building and testing + Git with address sanitizer more easily. + (merge 425ca6710b jk/build-with-asan later to maint). + + * On Cygwin, similar to Windows, "git push //server/share/repository" + ought to mean a repository on a network share that can be accessed + locally, but this did not work correctly due to stripping the double + slashes at the beginning. + + * The progress meter did not give a useful output when we haven't had + 0.5 seconds to measure the throughput during the interval. Instead + show the overall throughput rate at the end, which is a much more + useful number. + + * Code clean-up, that makes us in sync with Debian by one patch. + + * We run an early part of "git gc" that deals with refs before + daemonising (and not under lock) even when running a background + auto-gc, which caused multiple gc processes attempting to run the + early part at the same time. This is now prevented by running the + early part also under the GC lock. + + * A recent update broke an alias that contained an uppercase letter. * Other minor doc, test and build updates and code cleanups. - (merge c5a9157393 jh/memihash-opt later to maint). - (merge 44e2ff09ce ab/t3070-test-dedup later to maint). - (merge 9ee4aa95db rf/completion-config-commit later to maint). - (merge ef4fe5617e jk/connect-symref-info-leak-fix later to maint). - (merge a56eea28c4 jk/drop-free-refspecs later to maint). - (merge 0c79cee697 ad/pull-remote-doc later to maint). + (merge 5053313562 rs/urlmatch-cleanup later to maint). + (merge 42c78a216e rs/use-div-round-up later to maint). + (merge 5e8d2729ae rs/wt-status-cleanup later to maint). + (merge bc9b7e207f as/diff-options-grammofix later to maint). + (merge ac05222b31 ah/patch-id-doc later to maint). |