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diff --git a/Documentation/RelNotes/2.11.0.txt b/Documentation/RelNotes/2.11.0.txt new file mode 100644 index 0000000000..cfe94b9918 --- /dev/null +++ b/Documentation/RelNotes/2.11.0.txt @@ -0,0 +1,298 @@ +Git 2.11 Release Notes +====================== + +Updates since v2.10 +------------------- + +UI, Workflows & Features + + * "git format-patch --cover-letter HEAD^" to format a single patch + with a separate cover letter now numbers the output as [PATCH 0/1] + and [PATCH 1/1] by default. + + * An incoming "git push" that attempts to push too many bytes can now + be rejected by setting a new configuration variable at the receiving + end. + + * "git nosuchcommand --help" said "No manual entry for gitnosuchcommand", + which was not intuitive, given that "git nosuchcommand" said "git: + 'nosuchcommand' is not a git command". + + * "git clone --resurse-submodules --reference $path $URL" is a way to + reduce network transfer cost by borrowing objects in an existing + $path repository when cloning the superproject from $URL; it + learned to also peek into $path for presense of corresponding + repositories of submodules and borrow objects from there when able. + + * The "git diff --submodule={short,log}" mechanism has been enhanced + to allow "--submodule=diff" to show the patch between the submodule + commits bound to the superproject. + + * Even though "git hash-objects", which is a tool to take an + on-filesystem data stream and put it into the Git object store, + allowed to perform the "outside-world-to-Git" conversions (e.g. + end-of-line conversions and application of the clean-filter), and + it had the feature on by default from very early days, its reverse + operation "git cat-file", which takes an object from the Git object + store and externalize for the consumption by the outside world, + lacked an equivalent mechanism to run the "Git-to-outside-world" + conversion. The command learned the "--filters" option to do so. + + * Output from "git diff" can be made easier to read by selecting + which lines are common and which lines are added/deleted + intelligently when the lines before and after the changed section + are the same. A command line option is added to help with the + experiment to find a good heuristics. + + * In some projects, it is common to use "[RFC PATCH]" as the subject + prefix for a patch meant for discussion rather than application. A + new option "--rfc" was a short-hand for "--subject-prefix=RFC PATCH" + to help the participants of such projects. + + * "git add --chmod=+x <pathspec>" added recently only toggled the + executable bit for paths that are either new or modified. This has + been corrected to flip the executable bit for all paths that match + the given pathspec. + + * When "git format-patch --stdout" output is placed as an in-body + header and it uses the RFC2822 header folding, "git am" failed to + put the header line back into a single logical line. The + underlying "git mailinfo" was taught to handle this properly. + + +Performance, Internal Implementation, Development Support etc. + + * The delta-base-cache mechanism has been a key to the performance in + a repository with a tightly packed packfile, but it did not scale + well even with a larger value of core.deltaBaseCacheLimit. + + * Enhance "git status --porcelain" output by collecting more data on + the state of the index and the working tree files, which may + further be used to teach git-prompt (in contrib/) to make fewer + calls to git. + + * Extract a small helper out of the function that reads the authors + script file "git am" internally uses. + (merge a77598e jc/am-read-author-file later to maint). + + * Lifts calls to exit(2) and die() higher in the callchain in + sequencer.c files so that more helper functions in it can be used + by callers that want to handle error conditions themselves. + + * "git am" has been taught to make an internal call to "git apply"'s + innards without spawning the latter as a separate process. + + * The ref-store abstraction was introduced to the refs API so that we + can plug in different backends to store references. + + * The "unsigned char sha1[20]" to "struct object_id" conversion + continues. Notable changes in this round includes that ce->sha1, + i.e. the object name recorded in the cache_entry, turns into an + object_id. + + * JGit can show a fake ref "capabilities^{}" to "git fetch" when it + does not advertise any refs, but "git fetch" was not prepared to + see such an advertisement. When the other side disconnects without + giving any ref advertisement, we used to say "there may not be a + repository at that URL", but we may have seen other advertisement + like "shallow" and ".have" in which case we definitely know that a + repository is there. The code to detect this case has also been + updated. + + * Some codepaths in "git pack-objects" were not ready to use an + existing pack bitmap; now they are and as the result they have + become faster. + + +Also contains various documentation updates and code clean-ups. + + +Fixes since v2.10 +----------------- + +Unless otherwise noted, all the fixes since v2.9 in the maintenance +track are contained in this release (see the maintenance releases' +notes for details). + + * Clarify various ways to specify the "revision ranges" in the + documentation. + + * "diff-highlight" script (in contrib/) learned to work better with + "git log -p --graph" output. + + * The test framework left the number of tests and success/failure + count in the t/test-results directory, keyed by the name of the + test script plus the process ID. The latter however turned out not + to serve any useful purpose. The process ID part of the filename + has been removed. + + * Having a submodule whose ".git" repository is somehow corrupt + caused a few commands that recurse into submodules loop forever. + + * "git symbolic-ref -d HEAD" happily removes the symbolic ref, but + the resulting repository becomes an invalid one. Teach the command + to forbid removal of HEAD. + + * A test spawned a short-lived background process, which sometimes + prevented the test directory from getting removed at the end of the + script on some platforms. + + * Update a few tests that used to use GIT_CURL_VERBOSE to use the + newer GIT_TRACE_CURL. + + * "git pack-objects --include-tag" was taught that when we know that + we are sending an object C, we want a tag B that directly points at + C but also a tag A that points at the tag B. We used to miss the + intermediate tag B in some cases. + (merge b773dde jk/pack-tag-of-tag later to maint). + + * Update Japanese translation for "git-gui". + (merge 02748bc sy/git-gui-i18n-ja later to maint). + + * "git fetch http::/site/path" did not die correctly and segfaulted + instead. + (merge d63ed6e jk/fix-remote-curl-url-wo-proto later to maint). + + * "git commit-tree" stopped reading commit.gpgsign configuration + variable that was meant for Porcelain "git commit" in Git 2.9; we + forgot to update "git gui" to look at the configuration to match + this change. + (merge f14a310 js/git-gui-commit-gpgsign later to maint). + + * "git add --chmod=+x" added recently lacked documentation, which has + been corrected. + (merge 7ef7903 et/add-chmod-x later to maint). + + * "git log --cherry-pick" used to include merge commits as candidates + to be matched up with other commits, resulting a lot of wasted time. + The patch-id generation logic has been updated to ignore merges to + avoid the wastage. + (merge 7c81040 jk/patch-ids-no-merges later to maint). + + * The http transport (with curl-multi option, which is the default + these days) failed to remove curl-easy handle from a curlm session, + which led to unnecessary API failures. + (merge 2abc848 ew/http-do-not-forget-to-call-curl-multi-remove-handle later to maint). + + * There were numerous corner cases in which the configuration files + are read and used or not read at all depending on the directory a + Git command was run, leading to inconsistent behaviour. The code + to set-up repository access at the beginning of a Git process has + been updated to fix them. + (merge 4d0efa1 jk/setup-sequence-update later to maint). + + * "git diff -W" output needs to extend the context backward to + include the header line of the current function and also forward to + include the body of the entire current function up to the header + line of the next one. This process may have to merge to adjacent + hunks, but the code forgot to do so in some cases. + (merge 45d2f75 rs/xdiff-merge-overlapping-hunks-for-W-context later to maint). + + * Performance tests done via "t/perf" did not use the same set of + build configuration if the user relied on autoconf generated + configuration. + (merge cd5c281 ks/perf-build-with-autoconf later to maint). + + * "git format-patch --base=..." feature that was recently added + showed the base commit information after "-- " e-mail signature + line, which turned out to be inconvenient. The base information + has been moved above the signature line. + (merge 480871e jt/format-patch-base-info-above-sig later to maint). + + * More i18n. + (merge 43073f8 va/i18n later to maint). + + * Even when "git pull --rebase=preserve" (and the underlying "git + rebase --preserve") can complete without creating any new commit + (i.e. fast-forwards), it still insisted on having a usable ident + information (read: user.email is set correctly), which was less + than nice. As the underlying commands used inside "git rebase" + would fail with a more meaningful error message and advice text + when the bogus ident matters, this extra check was removed. + (merge 1e461c4 jk/rebase-i-drop-ident-check later to maint). + + * "git gc --aggressive" used to limit the delta-chain length to 250, + which is way too deep for gaining additional space savings and is + detrimental for runtime performance. The limit has been reduced to + 50. + (merge 07e7dbf jk/reduce-gc-aggressive-depth later to maint). + + * Documentation for individual configuration variables to control use + of color (like `color.grep`) said that their default value is + 'false', instead of saying their default is taken from `color.ui`. + When we updated the default value for color.ui from 'false' to + 'auto' quite a while ago, all of them broke. This has been + corrected. + (merge 14d16e2 mm/config-color-ui-default-to-auto later to maint). + + * The pretty-format specifier "%C(auto)" used by the "log" family of + commands to enable coloring of the output is taught to also issue a + color-reset sequence to the output. + (merge c99ad27 rs/c-auto-resets-attributes later to maint). + + * A shell script example in check-ref-format documentation has been + fixed. + (merge 92dece7 ep/doc-check-ref-format-example later to maint). + + * "git checkout <word>" does not follow the usual disambiguation + rules when the <word> can be both a rev and a path, to allow + checking out a branch 'foo' in a project that happens to have a + file 'foo' in the working tree without having to disambiguate. + This was poorly documented and the check was incorrect when the + command was run from a subdirectory. + (merge b829b94 nd/checkout-disambiguation later to maint). + + * Some codepaths in "git diff" used regexec(3) on a buffer that was + mmap(2)ed, which may not have a terminating NUL, leading to a read + beyond the end of the mapped region. This was fixed by introducing + a regexec_buf() helper that takes a <ptr,len> pair with REG_STARTEND + extension. + (merge b7d36ff js/regexec-buf later to maint). + + * The procedure to build Git on Mac OS X for Travis CI hardcoded the + internal directory structure we assumed HomeBrew uses, which was a + no-no. The procedure has been updated to ask HomeBrew things we + need to know to fix this. + (merge f86f49b ls/travis-homebrew-path-fix later to maint). + + * When "git rebase -i" is given a broken instruction, it told the + user to fix it with "--edit-todo", but didn't say what the step + after that was (i.e. "--continue"). + (merge 37875b4 rt/rebase-i-broken-insn-advise later to maint). + + * Documentation around tools to import from CVS was fairly outdated. + (merge 106b672 jk/doc-cvs-update later to maint). + + * "git clone --recurse-submodules" lost the progress eye-candy in + recent update, which has been corrected. + + * A low-level function verify_packfile() was meant to show errors + that were detected without dying itself, but under some conditions + it didn't and died instead, which has been fixed. + (merge a9445d859e jk/verify-packfile-gently later to maint). + + * When "git fetch" tries to find where the history of the repository + it runs in has diverged from what the other side has, it has a + mechanism to avoid digging too deep into irrelevant side branches. + This however did not work well over the "smart-http" transport due + to a design bug, which has been fixed. + (merge 06b3d386e0 jt/fetch-pack-in-vain-count-with-stateless later to maint). + + * In the codepath that comes up with the hostname to be used in an + e-mail when the user didn't tell us, we looked at ai_canonname + field in struct addrinfo without making sure it is not NULL first. + (merge c375a7efa3 jk/ident-ai-canonname-could-be-null later to maint). + + * "git worktree", even though it used the default_abbrev setting that + ought to be affected by core.abbrev configuration variable, ignored + the variable setting. The command has been taught to read the + default set of configuration variables to correct this. + (merge d49028e6e7 jc/worktree-config later to maint). + + * Other minor doc, test and build updates and code cleanups. + (merge e78d57e bw/pathspec-remove-unused-extern-decl later to maint). + (merge ce25e4c rs/checkout-some-states-are-const later to maint). + (merge a8342a4 rs/strbuf-remove-fix later to maint). + (merge b56aa5b rs/unpack-trees-reduce-file-scope-global later to maint). + (merge 5efc60c mr/vcs-svn-printf-ulong later to maint). + (merge a22ae75 rs/cocci later to maint). |