Git v2.3 Release Notes ====================== Updates since v2.2 ------------------ Ports * Recent gcc toolchain on Cygwin started throwing compilation warning, which has been squelched. * A few updates to build on platforms that lack tv_nsec, clock_gettime, CLOCK_MONOTONIC and HMAC_CTX_cleanup (e.g. older RHEL) have been added. UI, Workflows & Features * It was cumbersome to use "GIT_SSH" mechanism when the user wanted to pass an extra set of arguments to the underlying ssh. A new environment variable GIT_SSH_COMMAND can be used for this. * A request to store an empty note via "git notes" meant to remove note from the object but with --allow-empty we will store a (surprise!) note that is empty. * "git interpret-trailers" learned to properly handle the "Conflicts:" block at the end. * "git am" learned "--message-id" option to copy the message ID of the incoming e-mail to the log message of resulting commit. * "git clone --reference=" learned the "--dissociate" option to go with it; it borrows objects from the reference object store while cloning only to reduce network traffic and then dissociates the resulting clone from the reference by performing local copies of borrowed objects. * "git send-email" learned "--transfer-encoding" option to force a non-fault Content-Transfer-Encoding header (e.g. base64). * "git send-email" normally identifies itself via X-Mailer: header in the message it sends out. A new command line flag --no-xmailer allows the user to squelch the header. * "git push" into a repository with a working tree normally refuses to modify the branch that is checked out. The command learned to optionally do an equivalent of "git reset --hard" only when there is no change to the working tree and the index instead, which would be useful to "deploy" by pushing into a repository. * "git new-workdir" (in contrib/) can be used to populate an empty and existing directory now. * Credential helpers are asked in turn until one of them give positive response, which is cumbersome to turn off when you need to run Git in an automated setting. The credential helper interface learned to allow a helper to say "stop, don't ask other helpers." Also GIT_TERMINAL_PROMPT environment can be set to false to disable our built-in prompt mechanism for passwords. * "git branch -d" (delete) and "git branch -m" (move) learned to honor "-f" (force) flag; unlike many other subcommands, the way to force these have been with separate "-D/-M" options, which was inconsistent. * "diff-highlight" filter (in contrib/) allows its color output to be customized via configuration variables. * "git imap-send" learned to take "-v" (verbose) and "-q" (quiet) command line options. * "git remote add $name $URL" is now allowed when "url.$URL.insteadOf" is already defined. * "git imap-send" now can be built to use cURL library to talk to IMAP servers (if the library is recent enough, of course). This allows you to use authenticate method other than CRAM-MD5, among other things. * "git imap-send" now allows GIT_CURL_VERBOSE environment variable to control the verbosity when talking via the cURL library. * The prompt script (in contrib/) learned to optionally hide prompt when in an ignored directory by setting GIT_PS1_HIDE_IF_PWD_IGNORED shell variable. Performance, Internal Implementation, Development Support etc. * Earlier we made "rev-list --object-edge" more aggressively list the objects at the edge commits, in order to reduce number of objects　 fetched into a shallow repository, but the change affected cases other than "fetching into a shallow repository" and made it unusably slow (e.g. fetching into a normal repository should not have to suffer the overhead from extra processing). Limit it to a more specific case by introducing --objects-edge-aggressive, a new option to rev-list. * Squelched useless compiler warnings on Mac OS X regarding the crypto API. * The procedure to generate unicode table has been simplified. * Some filesystems assign filemodes in a strange way, fooling then automatic "filemode trustability" check done during a new repository creation. The initialization codepath has been hardened against this issue. * The codepath in "git remote update --prune" to drop many refs has been optimized. * The API into get_merge_bases*() family of functions was easy to misuse, which has been corrected to make it harder to do so. * Long overdue departure from the assumption that S_IFMT is shared by everybody made in 2005, which was necessary to port to z/OS. * "git push" and "git fetch" did not communicate an overlong refname correctly. Now it uses 64kB sideband to accommodate longer ones. * Recent GPG changes the keyring format and drops support for RFC1991 formatted signatures, breaking our existing tests. * "git-prompt" (in contrib/) used a variable from the global scope, possibly contaminating end-user's namespace. Also contains various documentation updates and code clean-ups. Fixes since v2.2 ---------------- Unless otherwise noted, all the fixes since v2.2 in the maintenance track are contained in this release (see the maintenance releases' notes for details). * The logic in "git bisect bad HEAD" etc. to avoid forcing the test of the common ancestor of bad and good commits was broken. (merge 07913d5 cc/bisect-rev-parsing later to maint). * "git checkout-index --temp=$target $path" did not work correctly for paths outside the current subdirectory in the project. (merge 74c4de5 es/checkout-index-temp later to maint). * The report from "git checkout" on a branch that builds on another local branch by setting its branch.*.merge to branch name (not a full refname) incorrectly said that the upstream is gone. (merge 05e7368 jc/checkout-local-track-report later to maint). * With The git-prompt support (in contrib/), using the exit status of the last command in the prompt, e.g. PS1='$(__git_ps1) $? ', did not work well, because the helper function stomped on the exit status. (merge 6babe76 tf/prompt-preserve-exit-status later to maint). * Recent update to "git commit" broke amending an existing commit with bogus author/committer lines without a valid e-mail address. (merge c83a509 jk/commit-date-approxidate later to maint). * The lockfile API used to get confused which file to clean up when the process moved the $cwd after creating a lockfile. (merge fa137f6 nd/lockfile-absolute later to maint). * Traditionally we tried to avoid interpreting date strings given by the user as future dates, e.g. GIT_COMMITTER_DATE=2014-12-10 when used early November 2014 was taken as "October 12, 2014" because it is likely that a date in the future, December 10, is a mistake. This heuristics has been loosened to allow people to express future dates (most notably, --until= may want to be far in the future) and we no longer tiebreak by future-ness of the date when (1) ISO-like format is used, and (2) the string can make sense interpreted as both y-m-d and y-d-m. Git may still have to use the heuristics to tiebreak between dd/mm/yy and mm/dd/yy, though. (merge d372395 jk/approxidate-avoid-y-d-m-over-future-dates later to maint). * Git did not correctly read an overlong refname from a packed refs file. (merge ea41783 jk/read-packed-refs-without-path-max later to maint). * "git apply" was described in the documentation to take --ignore-date option, which it does not. (merge 0cef4e7 rw/apply-does-not-take-ignore-date later to maint). * "git add -i" did not notice when the interactive command input stream went away and kept asking the same question. (merge a8bec7a jk/add-i-read-error later to maint). * "git send-email" did not handle RFC 2047 encoded headers quite right. (merge ab47e2a rd/send-email-2047-fix later to maint). * New tag object format validation added in 2.2 showed garbage after a tagname it reported in its error message. (merge a1e920a js/fsck-tag-validation later to maint). * The code that reads the reflog from the newer to the older entries did not handle an entry that crosses a boundary of block it uses to read them correctly. (merge 69216bf jk/for-each-reflog-ent-reverse later to maint). * "git diff -B -M" after making a new copy B out of an existing file A and then editing A extensively ought to report that B was created by copying A and A was modified, which is what "git diff -C" reports, but it instead said A was renamed to B and A was edited heavily in place. This was not just incoherent but also failed to apply with "git apply". The report has been corrected to match what "git diff -C" produces for this case. (merge 6936b58 jc/diff-b-m later to maint). * In files we pre-populate for the user to edit with commented hints, a line of hint that is indented with a tab used to show as '#' (or any comment char), ' ' (space), and then the hint text that began with the tab, which some editors flag as an indentation error (tab following space). We now omit the space after the comment char in such a case. (merge d55aeb7 jc/strbuf-add-lines-avoid-sp-ht-sequence later to maint). * "git ls-tree" does not support path selection based on negative pathspecs, but did not error out when negative pathspecs are given. (merge f1f6224 nd/ls-tree-pathspec later to maint). * The function sometimes returned a non-freeable memory and some other times returned a piece of memory that must be freed, leading to inevitable leaks. (merge 59362e5 jc/exec-cmd-system-path-leak-fix later to maint). * The code to abbreviate an object name to its short unique prefix has been optimized when no abbreviation was requested. (merge 61e704e mh/find-uniq-abbrev later to maint). * "git add --ignore-errors ..." did not ignore an error to give a file that did not exist. (merge 1d31e5a mg/add-ignore-errors later to maint). * "git checkout $treeish $path", when $path in the index and the working tree already matched what is in $treeish at the $path, still overwrote the $path unnecessarily. (merge c5326bd jk/checkout-from-tree later to maint). * "git config --get-color" did not parse its command line arguments carefully. (merge cb35722 jk/colors-fix later to maint). * open() emulated on Windows platforms did not give EISDIR upon an attempt to open a directory for writing. (merge ba6fad0 js/windows-open-eisdir-error later to maint). * A few code paths used abs() when they should have used labs() on long integers. (merge 83915ba rs/maint-config-use-labs later to maint). (merge 31a8aa1 rs/receive-pack-use-labs later to maint). * "gitweb" used to depend on a behaviour recent CGI.pm deprecated. (merge 13dbf46 jk/gitweb-with-newer-cgi-multi-param later to maint). * "git init" (hence "git clone") initialized the per-repository configuration file .git/config with x-bit by mistake. (merge 1f32ecf mh/config-flip-xbit-back-after-checking later to maint). * Recent update in Git 2.2 started creating objects/info/packs and info/refs files with permission bits tighter than user's umask. (merge d91175b jk/prune-packed-server-info later to maint). * Git 2.0 was supposed to make the "simple" mode for the default of "git push", but it didn't. (merge 00a6fa0 jk/push-simple later to maint). * "Everyday" document had a broken link. (merge 366c8d4 po/everyday-doc later to maint). * A few test fixes. (merge 880ef58 jk/no-perl-tests later to maint). * The build procedure did not bother fixing perl and python scripts when NO_PERL and NO_PYTHON build-time configuration changed. (merge ca2051d jk/rebuild-perl-scripts-with-no-perl-seting-change later to maint). * The usage string of "git log" command was marked incorrectly for l10n. (merge e66dc0c km/log-usage-string-i18n later to maint). * "git for-each-ref" mishandled --format="%(upstream:track)" when a branch is marked to have forked from a non-existing branch. (merge b6160d9 rc/for-each-ref-tracking later to maint).