Git 2.21 Release Notes
======================
Backward Compatibility Notes
----------------------------
* Historically, the "-m" (mainline) option can only be used for "git
cherry-pick" and "git revert" when working with a merge commit.
This version of Git no longer warns or errors out when working with
a single-parent commit, as long as the argument to the "-m" option
is 1 (i.e. it has only one parent, and the request is to pick or
revert relative to that first parent). Scripts that relied on the
behaviour may get broken with this change.
Updates since v2.20
-------------------
UI, Workflows & Features
* The "http.version" configuration variable can be used with recent
enough versions of cURL library to force the version of HTTP used
to talk when fetching and pushing.
* Small fixes and features for fast-export and fast-import, mostly on
the fast-export side has been made.
* "git push $there $src:$dst" rejects when $dst is not a fully
qualified refname and it is not clear what the end user meant. The
codepath has been taught to give a clearer error message, and also
guess where the push should go by taking the type of the pushed
object into account (e.g. a tag object would want to go under
refs/tags/).
* "git checkout [<tree-ish>] path..." learned to report the number of
paths that have been checked out of the index or the tree-ish,
which gives it the same degree of noisy-ness as the case in which
the command checks out a branch. "git checkout -m <pathspec>" to
undo conflict resolution gives a similar message.
* "git quiltimport" learned "--keep-non-patch" option.
* "git worktree remove" and "git worktree move" refused to work when
there is a submodule involved. This has been loosened to ignore
uninitialized submodules.
* "git cherry-pick -m1" was forbidden when picking a non-merge
commit, even though there _is_ parent number 1 for such a commit.
This was done to avoid mistakes back when "cherry-pick" was about
picking a single commit, but is no longer useful with "cherry-pick"
that can pick a range of commits. Now the "-m$num" option is
allowed when picking any commit, as long as $num names an existing
parent of the commit.
* Update "git multimail" from the upstream.
* "git p4" update.
* The "--format=<placeholder>" option of for-each-ref, branch and tag
learned to show a few more traits of objects that can be learned by
the object_info API.
* "git rebase -i" learned to re-execute a command given with 'exec'
to run after it failed the last time.
* "git diff --color-moved-ws" updates.
* Custom userformat "log --format" learned %S atom that stands for
the tip the traversal reached the commit from, i.e. --source.
* "git instaweb" learned to drive http.server that comes with
"batteries included" Python installation (both Python2 & 3).
* A new encoding UTF-16LE-BOM has been invented to force encoding to
UTF-16 with BOM in little endian byte order, which cannot be directly
generated by using iconv.
* A new date format "--date=human" that morphs its output depending
on how far the time is from the current time has been introduced.
"--date=auto:human" can be used to use this new format (or any
existing format) when the output is going to the pager or to the
terminal, and otherwise the default format.
Performance, Internal Implementation, Development Support etc.
* Code clean-up with optimization for the codepath that checks
(non-)existence of loose objects.
* More codepaths have become aware of working with in-core repository
instances other than the default "the_repository".
* The "strncat()" function is now among the banned functions.
* Portability updates for the HPE NonStop platform.
* Earlier we added "-Wformat-security" to developer builds, assuming
that "-Wall" (which includes "-Wformat" which in turn is required
to use "-Wformat-security") is always in effect. This is not true
when config.mak.autogen is in use, unfortunately. This has been
fixed by unconditionally adding "-Wall" to developer builds.
* The loose object cache used to optimize existence look-up has been
updated.
* Flaky tests can now be repeatedly run under load with the
"--stress" option.
* Documentation/Makefile is getting prepared for manpage
localization.
* "git fetch-pack" now can talk the version 2 protocol.
* sha-256 hash has been added and plumbed through the code to allow
building Git with the "NewHash".
* Debugging help for http transport.
* "git fetch --deepen=<more>" has been corrected to work over v2
protocol.
* The code to walk tree objects has been taught that we may be
working with object names that are not computed with SHA-1.
* The in-core repository instances are passed through more codepaths.
* Update the protocol message specification to allow only the limited
use of scaled quantities. This is to ensure potential compatibility
issues will not get out of hand.
* Micro-optimize the code that prepares commit objects to be walked
by "git rev-list" when the commit-graph is available.
* "git fetch" and "git upload-pack" learned to send all exchanges over
the sideband channel while talking the v2 protocol.
* The codepath to write out commit-graph has been optimized by
following the usual pattern of visiting objects in in-pack order.
* The codepath to show progress meter while writing out commit-graph
file has been improved.
* Cocci rules have been updated to encourage use of strbuf_addbuf().
* "git rebase --merge" has been reimplemented by reusing the internal
machinery used for "git rebase -i".
* More code in "git bisect" has been rewritten in C.
* Instead of going through "git-rebase--am" scriptlet to use the "am"
backend, the built-in version of "git rebase" learned to drive the
"am" backend directly.
* The assumption to work on the single "in-core index" instance has
been reduced from the library-ish part of the codebase.
* The test lint learned to catch non-portable "sed" options.
* "git pack-objects" learned another algorithm to compute the set of
objects to send, that trades the resulting packfile off to save
traversal cost to favor small pushes.
* The travis CI scripts have been corrected to build Git with the
compiler(s) of our choice.
* "git submodule update" learned to abort early when core.worktree
for the submodule is not set correctly to prevent spreading damage.
* Test suite has been adjusted to run on Azure Pipeline.
* Running "Documentation/doc-diff x" from anywhere other than the
top-level of the working tree did not show the usage string
correctly, which has been fixed.
* Use of the sparse tool got easier to customize from the command
line to help developers.
* A new target "coverage-prove" to run the coverage test under
"prove" has been added.
* A flakey "p4" test has been removed.
* The code and tests assume that the system supplied iconv() would
always use BOM in its output when asked to encode to UTF-16 (or
UTF-32), but apparently some implementations output big-endian
without BOM. A compile-time knob has been added to help such
systems (e.g. NonStop) to add BOM to the output to increase
portability.
Fixes since v2.20
-----------------
* Updates for corner cases in merge-recursive.
(merge cc4cb0902c en/merge-path-collision later to maint).
* "git checkout frotz" (without any double-dash) avoids ambiguity by
making sure 'frotz' cannot be interpreted as a revision and as a
path at the same time. This safety has been updated to check also
a unique remote-tracking branch 'frotz' in a remote, when dwimming
to create a local branch 'frotz' out of a remote-tracking branch
'frotz' from a remote.
(merge be4908f103 nd/checkout-dwim-fix later to maint).
* Refspecs configured with "git -c var=val clone" did not propagate
to the resulting repository, which has been corrected.
(merge 7eae4a3ac4 sg/clone-initial-fetch-configuration later to maint).
* A properly configured username/email is required under
user.useConfigOnly in order to create commits; now "git stash"
(even though it creates commit objects to represent stash entries)
command is exempt from the requirement.
(merge 3bc2111fc2 sd/stash-wo-user-name later to maint).
* The http-backend CGI process did not correctly clean up the child
processes it spawns to run upload-pack etc. when it dies itself,
which has been corrected.
(merge 02818a98d7 mk/http-backend-kill-children-before-exit later to maint).
* "git rev-list --exclude-promisor-objects" had to take an object
that does not exist locally (and is lazily available) from the
command line without barfing, but the code dereferenced NULL.
(merge 4cf67869b2 md/list-lazy-objects-fix later to maint).
* The traversal over tree objects has learned to honor
":(attr:label)" pathspec match, which has been implemented only for
enumerating paths on the filesystem.
(merge 5a0b97b34c nd/attr-pathspec-in-tree-walk later to maint).
* BSD port updates.
(merge 4e3ecbd439 cb/openbsd-allows-reading-directory later to maint).
(merge b6bdc2a0f5 cb/t5004-empty-tar-archive-fix later to maint).
(merge 82cbc8cde2 cb/test-lint-cp-a later to maint).
* Lines that begin with a certain keyword that come over the wire, as
well as lines that consist only of one of these keywords, ought to
be painted in color for easier eyeballing, but the latter was
broken ever since the feature was introduced in 2.19, which has
been corrected.
(merge 1f67290450 hn/highlight-sideband-keywords later to maint).
* "git log -G<regex>" looked for a hunk in the "git log -p" patch
output that contained a string that matches the given pattern.
Optimize this code to ignore binary files, which by default will
not show any hunk that would match any pattern (unless textconv or
the --text option is in effect, that is).
(merge e0e7cb8080 tb/log-G-binary later to maint).
* "git submodule update" ought to use a single job unless asked, but
by mistake used multiple jobs, which has been fixed.
(merge e3a9d1aca9 sb/submodule-fetchjobs-default-to-one later to maint).
* "git stripspace" should be usable outside a git repository, but
under the "-s" or "-c" mode, it didn't.
(merge 957da75802 jn/stripspace-wo-repository later to maint).
* Some of the documentation pages formatted incorrectly with
Asciidoctor, which have been fixed.
(merge b62eb1d2f4 ma/asciidoctor later to maint).
* The core.worktree setting in a submodule repository should not be
pointing at a directory when the submodule loses its working tree
(e.g. getting deinit'ed), but the code did not properly maintain
this invariant.
* With zsh, "git cmd path<TAB>" was completed to "git cmd path name"
when the completed path has a special character like SP in it,
without any attempt to keep "path name" a single filename. This
has been fixed to complete it to "git cmd path\ name" just like
Bash completion does.
* The test suite tried to see if it is run under bash, but the check
itself failed under some other implementations of shell (notably
under NetBSD). This has been corrected.
(merge 54ea72f09c sg/test-bash-version-fix later to maint).
* "git gc" and "git repack" did not close the open packfiles that
they found unneeded before removing them, which didn't work on a
platform incapable of removing an open file. This has been
corrected.
(merge 5bdece0d70 js/gc-repack-close-before-remove later to maint).
* The code to drive GIT_EXTERNAL_DIFF command relied on the string
returned from getenv() to be non-volatile, which is not true, that
has been corrected.
(merge 6776a84dae kg/external-diff-save-env later to maint).
* There were many places the code relied on the string returned from
getenv() to be non-volatile, which is not true, that have been
corrected.
(merge 0da0e9268b jk/save-getenv-result later to maint).
* The v2 upload-pack protocol implementation failed to honor
hidden-ref configuration, which has been corrected.
(merge e20b4192a3 jk/proto-v2-hidden-refs-fix later to maint).
* "git fetch --recurse-submodules" may not fetch the necessary commit
that is bound to the superproject, which is getting corrected.
(merge be76c21282 sb/submodule-recursive-fetch-gets-the-tip later to maint).
* "git rebase" internally runs "checkout" to switch between branches,
and the command used to call the post-checkout hook, but the
reimplementation stopped doing so, which is getting fixed.
* "git add -e" got confused when the change it wants to let the user
edit is smaller than the previous change that was left over in a
temporary file.
(merge fa6f225e01 js/add-e-clear-patch-before-stating later to maint).
* "git p4" failed to update a shelved change when there were moved
files, which has been corrected.
(merge 7a10946ab9 ld/git-p4-shelve-update-fix later to maint).
* The codepath to read from the commit-graph file attempted to read
past the end of it when the file's table-of-contents was corrupt.
* The compat/obstack code had casts that -Wcast-function-type
compilation option found questionable.
(merge 764473d257 sg/obstack-cast-function-type-fix later to maint).
* An obvious typo in an assertion error message has been fixed.
(merge 3c27e2e059 cc/test-ref-store-typofix later to maint).
* In Git for Windows, "git clone \\server\share\path" etc. that uses
UNC paths from command line had bad interaction with its shell
emulation.
* "git add --ignore-errors" did not work as advertised and instead
worked as an unintended synonym for "git add --renormalize", which
has been fixed.
(merge e2c2a37545 jk/add-ignore-errors-bit-assignment-fix later to maint).
* On a case-insensitive filesystem, we failed to compare the part of
the path that is above the worktree directory in an absolute
pathname, which has been corrected.
* Asking "git check-attr" about a macro (e.g. "binary") on a specific
path did not work correctly, even though "git check-attr -a" listed
such a macro correctly. This has been corrected.
(merge 7b95849be4 jk/attr-macro-fix later to maint).
* "git pack-objects" incorrectly used uninitialized mutex, which has
been corrected.
(merge edb673cf10 ph/pack-objects-mutex-fix later to maint).
* "git checkout -b <new> [HEAD]" to create a new branch from the
current commit and check it out ought to be a no-op in the index
and the working tree in normal cases, but there are corner cases
that do require updates to the index and the working tree. Running
it immediately after "git clone --no-checkout" is one of these
cases that an earlier optimization kicked in incorrectly, which has
been fixed.
(merge 8424bfd45b bp/checkout-new-branch-optim later to maint).
* "git diff --color-moved --cc --stat -p" did not work well due to
funny interaction between a bug in color-moved and the rest, which
has been fixed.
(merge dac03b5518 jk/diff-cc-stat-fixes later to maint).
* When GIT_SEQUENCE_EDITOR is set, the command was incorrectly
started when modes of "git rebase" that implicitly uses the
machinery for the interactive rebase are run, which has been
corrected.
(merge 891d4a0313 pw/no-editor-in-rebase-i-implicit later to maint).
* The commit-graph facility did not work when in-core objects that
are promoted from unknown type to commit (e.g. a commit that is
accessed via a tag that refers to it) were involved, which has been
corrected.
(merge 4468d4435c sg/object-as-type-commit-graph-fix later to maint).
* "git fetch" output cleanup.
(merge dc40b24df4 nd/fetch-compact-update later to maint).
* "git cat-file --batch" reported a dangling symbolic link by
mistake, when it wanted to report that a given name is ambiguous.
* Documentation around core.crlf has been updated.
(merge c9446f0504 jk/autocrlf-overrides-eol-doc later to maint).
* The documentation of "git commit-tree" said that the command
understands "--gpg-sign" in addition to "-S", but the command line
parser did not know about the longhand, which has been corrected.
* "git rebase -x $cmd" did not reject multi-line command, even though
the command is incapable of handling such a command. It now is
rejected upfront.
(merge c762aada1a pw/rebase-x-sanity-check later to maint).
* Output from "git help" was not correctly aligned, which has been
fixed.
(merge 6195a76da4 nd/help-align-command-desc later to maint).
* The "git submodule summary" subcommand showed shortened commit
object names by mechanically truncating them at 7-hexdigit, which
has been improved to let "rev-parse --short" scale the length of
the abbreviation with the size of the repository.
(merge 0586a438f6 sh/submodule-summary-abbrev-fix later to maint).
* The way the OSX build jobs updates its build environment used the
"--quiet" option to "brew update" command, but it wasn't all that
quiet to be useful. The use of the option has been replaced with
an explicit redirection to the /dev/null (which incidentally would
have worked around a breakage by recent updates to homebrew, which
has fixed itself already).
(merge a1ccaedd62 sg/travis-osx-brew-breakage-workaround later to maint).
* "git --work-tree=$there --git-dir=$here describe --dirty" did not
work correctly as it did not pay attention to the location of the
worktree specified by the user by mistake, which has been
corrected.
(merge c801170b0c ss/describe-dirty-in-the-right-directory later to maint).
* "git fetch" over protocol v2 that needs to make a second connection
to backfill tags did not clear a variable that holds shallow
repository information correctly, leading to an access of freed
piece of memory.
* Some errors from the other side coming over smart HTTP transport
were not noticed, which has been corrected.
* Code cleanup, docfix, build fix, etc.
Git v2.20.1:
This release is primarily to fix brown-paper-bag breakages in the
2.20.0 release.
Fixes since v2.20
* A few newly added tests were not portable and caused minority
platforms to report false breakages, which have been fixed.
* Portability fix for a recent update to parse-options API.
* "git help -a" did not work well when an overly long alias is
defined, which has been corrected.
* A recent update accidentally squelched an error message when the
run_command API failed to run a missing command, which has been
corrected.
Git 2.20 Release Notes
======================
Backward Compatibility Notes
----------------------------
* "git branch -l <foo>" used to be a way to ask a reflog to be
created while creating a new branch, but that is no longer the
case. It is a short-hand for "git branch --list <foo>" now.
* "git push" into refs/tags/* hierarchy is rejected without getting
forced, but "git fetch" (misguidedly) used the "fast forwarding"
rule used for the refs/heads/* hierarchy; this has been corrected,
which means some fetches of tags that did not fail with older
version of Git will fail without "--force" with this version.
* "git help -a" now gives verbose output (same as "git help -av").
Those who want the old output may say "git help --no-verbose -a"..
* "git cpn --help", when "cpn" is an alias to, say, "cherry-pick -n",
reported only the alias expansion of "cpn" in earlier versions of
Git. It now runs "git cherry-pick --help" to show the manual page
of the command, while sending the alias expansion to the standard
error stream.
* "git send-email" learned to grab address-looking string on any
trailer whose name ends with "-by". This is a backward-incompatible
change. Adding "--suppress-cc=misc-by" on the command line, or
setting sendemail.suppresscc configuration variable to "misc-by",
can be used to disable this behaviour.
Updates since v2.19
-------------------
UI, Workflows & Features
* Running "git clone" against a project that contain two files with
pathnames that differ only in cases on a case insensitive
filesystem would result in one of the files lost because the
underlying filesystem is incapable of holding both at the same
time. An attempt is made to detect such a case and warn.
* "git checkout -b newbranch [HEAD]" should not have to do as much as
checking out a commit different from HEAD. An attempt is made to
optimize this special case.
* "git rev-list --stdin </dev/null" used to be an error; it now shows
no output without an error. "git rev-list --stdin --default HEAD"
still falls back to the given default when nothing is given on the
standard input.
* Lift code from GitHub to restrict delta computation so that an
object that exists in one fork is not made into a delta against
another object that does not appear in the same forked repository.
* "git format-patch" learned new "--interdiff" and "--range-diff"
options to explain the difference between this version and the
previous attempt in the cover letter (or after the three-dashes as
a comment).
* "git mailinfo" used in "git am" learned to make a best-effort
recovery of a patch corrupted by MUA that sends text/plain with
format=flawed option.
(merge 3aa4d81f88 rs/mailinfo-format-flowed later to maint).
* The rules used by "git push" and "git fetch" to determine if a ref
can or cannot be updated were inconsistent; specifically, fetching
to update existing tags were allowed even though tags are supposed
to be unmoving anchoring points. "git fetch" was taught to forbid
updates to existing tags without the "--force" option.
* "git multi-pack-index" learned to detect corruption in the .midx
file it uses, and this feature has been integrated into "git fsck".
* Generation of (experimental) commit-graph files have so far been
fairly silent, even though it takes noticeable amount of time in a
meaningfully large repository. The users will now see progress
output.
* The minimum version of Windows supported by Windows port of Git is
now set to Vista.
* The completion script (in contrib/) learned to complete a handful of
options "git stash list" command takes.
* The completion script (in contrib/) learned that "git fetch
--multiple" only takes remote names as arguments and no refspecs.
* "git status" learns to show progress bar when refreshing the index
takes a long time.
(merge ae9af12287 nd/status-refresh-progress later to maint).
* "git help -a" and "git help -av" give different pieces of
information, and generally the "verbose" version is more friendly
to the new users. "git help -a" by default now uses the more
verbose output (with "--no-verbose", you can go back to the
original). Also "git help -av" now lists aliases and external
commands, which it did not used to.
* Unlike "grep", "git grep" by default recurses to the whole tree.
The command learned "git grep --recursive" option, so that "git
grep --no-recursive" can serve as a synonym to setting the
max-depth to 0.
* When pushing into a repository that borrows its objects from an
alternate object store, "git receive-pack" that responds to the
push request on the other side lists the tips of refs in the
alternate to reduce the amount of objects transferred. This
sometimes is detrimental when the number of refs in the alternate
is absurdly large, in which case the bandwidth saved in potentially
fewer objects transferred is wasted in excessively large ref
advertisement. The alternate refs that are advertised are now
configurable with a pair of configuration variables.
* "git cmd --help" when "cmd" is aliased used to only say "cmd is
aliased to ...". Now it shows that to the standard error stream
and runs "git $cmd --help" where $cmd is the first word of the
alias expansion.
* The documentation of "git gc" has been updated to mention that it
is no longer limited to "pruning away crufts" but also updates
ancillary files like commit-graph as a part of repository
optimization.
* "git p4 unshelve" improvements.
* The logic to select the default user name and e-mail on Windows has
been improved.
(merge 501afcb8b0 js/mingw-default-ident later to maint).
* The "rev-list --filter" feature learned to exclude all trees via
"tree:0" filter.
* "git send-email" learned to grab address-looking string on any
trailer whose name ends with "-by"; --suppress-cc=misc-by on the
command line, or setting sendemail.suppresscc configuration
variable to "misc-by", can be used to disable this behaviour.
* "git mergetool" learned to take the "--[no-]gui" option, just like
"git difftool" does.
* "git rebase -i" learned a new insn, 'break', that the user can
insert in the to-do list. Upon hitting it, the command returns
control back to the user.
* New "--pretty=format:" placeholders %GF and %GP that show the GPG
key fingerprints have been invented.
* On platforms with recent cURL library, http.sslBackend configuration
variable can be used to choose a different SSL backend at runtime.
The Windows port uses this mechanism to switch between OpenSSL and
Secure Channel while talking over the HTTPS protocol.
* "git send-email" learned to disable SMTP authentication via the
"--smtp-auth=none" option, even when the smtp username is given
(which turns the authentication on by default).
* A fourth class of configuration files (in addition to the
traditional "system wide", "per user in the $HOME directory" and
"per repository in the $GIT_DIR/config") has been introduced so
that different worktrees that share the same repository (hence the
same $GIT_DIR/config file) can use different customization.
* A pattern with '**' that does not have a slash on either side used
to be an invalid one, but the code now treats such double-asterisks
the same way as two normal asterisks that happen to be adjacent to
each other.
(merge e5bbe09e88 nd/wildmatch-double-asterisk later to maint).
* The "--no-patch" option, which can be used to get a high-level
overview without the actual line-by-line patch difference shown, of
the "range-diff" command was earlier broken, which has been
corrected.
* The recently merged "rebase in C" has an escape hatch to use the
scripted version when necessary, but it hasn't been documented,
which has been corrected.
Performance, Internal Implementation, Development Support etc.
* Developer builds now use -Wunused-function compilation option.
* One of our CI tests to run with "unusual/experimental/random"
settings now also uses commit-graph and midx.
* When there are too many packfiles in a repository (which is not
recommended), looking up an object in these would require
consulting many pack .idx files; a new mechanism to have a single
file that consolidates all of these .idx files is introduced.
* "git submodule update" is getting rewritten piece-by-piece into C.
* The code for computing history reachability has been shuffled,
obtained a bunch of new tests to cover them, and then being
improved.
* The unpack_trees() API used in checking out a branch and merging
walks one or more trees along with the index. When the cache-tree
in the index tells us that we are walking a tree whose flattened
contents is known (i.e. matches a span in the index), as linearly
scanning a span in the index is much more efficient than having to
open tree objects recursively and listing their entries, the walk
can be optimized, which has been done.
* When creating a thin pack, which allows objects to be made into a
delta against another object that is not in the resulting pack but
is known to be present on the receiving end, the code learned to
take advantage of the reachability bitmap; this allows the server
to send a delta against a base beyond the "boundary" commit.
* spatch transformation to replace boolean uses of !hashcmp() to
newly introduced oideq() is added, and applied, to regain
performance lost due to support of multiple hash algorithms.
* Fix a bug in which the same path could be registered under multiple
worktree entries if the path was missing (for instance, was removed
manually). Also, as a convenience, expand the number of cases in
which --force is applicable.
* Split Documentation/config.txt for easier maintenance.
(merge 6014363f0b nd/config-split later to maint).
* Test helper binaries clean-up.
(merge c9a1f4161f nd/test-tool later to maint).
* Various tests have been updated to make it easier to swap the
hash function used for object identification.
(merge ae0c89d41b bc/hash-independent-tests later to maint).
* Update fsck.skipList implementation and documentation.
(merge 371a655074 ab/fsck-skiplist later to maint).
* An alias that expands to another alias has so far been forbidden,
but now it is allowed to create such an alias.
* Various test scripts have been updated for style and also correct
handling of exit status of various commands.
* "gc --auto" ended up calling exit(-1) upon error, which has been
corrected to use exit(1). Also the error reporting behaviour when
daemonized has been updated to exit with zero status when stopping
due to a previously discovered error (which implies there is no
point running gc to improve the situation); we used to exit with
failure in such a case.
* Various codepaths in the core-ish part learned to work on an
arbitrary in-core index structure, not necessarily the default
instance "the_index".
(merge b3c7eef9b0 nd/the-index later to maint).
* Code clean-up in the internal machinery used by "git status" and
"git commit --dry-run".
(merge 73ba5d78b4 ss/wt-status-committable later to maint).
* Some environment variables that control the runtime options of Git
used during tests are getting renamed for consistency.
(merge 4231d1ba99 bp/rename-test-env-var later to maint).
* A pair of new extensions to the index file have been introduced.
They allow the index file to be read in parallel for performance.
* The oidset API was built on top of the oidmap API which in turn is
on the hashmap API. Replace the implementation to build on top of
the khash API and gain performance.
* Over some transports, fetching objects with an exact commit object
name can be done without first seeing the ref advertisements. The
code has been optimized to exploit this.
* In a partial clone that will lazily be hydrated from the
originating repository, we generally want to avoid "does this
object exist (locally)?" on objects that we deliberately omitted
when we created the clone. The cache-tree codepath (which is used
to write a tree object out of the index) however insisted that the
object exists, even for paths that are outside of the partial
checkout area. The code has been updated to avoid such a check.
* To help developers, an EditorConfig file that attempts to follow
the project convention has been added.
(merge b548d698a0 bc/editorconfig later to maint).
* The result of coverage test can be combined with "git blame" to
check the test coverage of code introduced recently with a new
'coverage-diff' tool (in contrib/).
(merge 783faedd65 ds/coverage-diff later to maint).
* An experiment to fuzz test a few areas, hopefully we can gain more
coverage to various areas.
* More codepaths are moving away from hardcoded hash sizes.
* The way the Windows port figures out the current directory has been
improved.
* The way DLLs are loaded on the Windows port has been improved.
* Some tests have been reorganized and renamed; "ls t/" now gives a
better overview of what is tested for these scripts than before.
* "git rebase" and "git rebase -i" have been reimplemented in C.
* Windows port learned to use nano-second resolution file timestamps.
* The overly large Documentation/config.txt file have been split into
million little pieces. This potentially allows each individual piece
to be included into the manual page of the command it affects more easily.
* Replace three string-list instances used as look-up tables in "git
fetch" with hashmaps.
* Unify code to read the author-script used in "git am" and the
commands that use the sequencer machinery, e.g. "git rebase -i".
* In preparation to the day when we can deprecate and remove the
"rebase -p", make sure we can skip and later remove tests for
it.
* The history traversal used to implement the tag-following has been
optimized by introducing a new helper.
* The helper function to refresh the cached stat information in the
in-core index has learned to perform the lstat() part of the
operation in parallel on multi-core platforms.
* The code to traverse objects for reachability, used to decide what
objects are unreferenced and expendable, have been taught to also
consider per-worktree refs of other worktrees as starting points to
prevent data loss.
* "git add" needs to internally run "diff-files" equivalent, and the
codepath learned the same optimization as "diff-files" has to run
lstat(2) in parallel to find which paths have been updated in the
working tree.
* The procedure to install dependencies before testing at Travis CI
is getting revamped for both simplicity and flexibility, taking
advantage of the recent move to the vm-based environment.
* The support for format-patch (and send-email) by the command-line
completion script (in contrib/) has been simplified a bit.
* The revision walker machinery learned to take advantage of the
commit generation numbers stored in the commit-graph file.
* The codebase has been cleaned up to reduce "#ifndef NO_PTHREADS".
* The way -lcurl library gets linked has been simplified by taking
advantage of the fact that we can just ask curl-config command how.
* Various functions have been audited for "-Wunused-parameter" warnings
and bugs in them got fixed.
* A sanity check for start-up sequence has been added in the config
API codepath.
* The build procedure to link for fuzzing test has been made
customizable with a new Makefile variable.
* The way "git rebase" parses and forwards the command line options
meant for underlying "git am" has been revamped, which fixed for
options with parameters that were not passed correctly.
* Our testing framework uses a special i18n "poisoned localization"
feature to find messages that ought to stay constant but are
incorrectly marked to be translated. This feature has been made
into a runtime option (it used to be a compile-time option).
* "git push" used to check ambiguities between object-names and
refnames while processing the list of refs' old and new values,
which was unnecessary (as it knew that it is feeding raw object
names). This has been optimized out.
* The xcurl_off_t() helper function is used to cast size_t to
curl_off_t, but some compilers gave warnings against the code to
ensure the casting is done without wraparound, when size_t is
narrower than curl_off_t. This warning has been squelched.
* Code preparation to replace ulong vars with size_t vars where
appropriate continues.
* The "test installed Git" mode of our test suite has been updated to
work better.
* A coding convention around the Coccinelle semantic patches to have
two classes to ease code migration process has been proposed and
its support has been added to the Makefile.
* The "container" mode of TravisCI is going away. Our .travis.yml
file is getting prepared for the transition.
(merge 32ee384be8 ss/travis-ci-force-vm-mode later to maint).
* Our test scripts can now take the '-V' option as a synonym for the
'--verbose-log' option.
(merge a5f52c6dab sg/test-verbose-log later to maint).
Fixes since v2.19
-----------------
* "git interpret-trailers" and its underlying machinery had a buggy
code that attempted to ignore patch text after commit log message,
which triggered in various codepaths that will always get the log
message alone and never get such an input.
(merge 66e83d9b41 jk/trailer-fixes later to maint).
* Malformed or crafted data in packstream can make our code attempt
to read or write past the allocated buffer and abort, instead of
reporting an error, which has been fixed.
* "git rebase -i" did not clear the state files correctly when a run
of "squash/fixup" is aborted and then the user manually amended the
commit instead, which has been corrected.
(merge 10d2f35436 js/rebase-i-autosquash-fix later to maint).
* When fsmonitor is in use, after operation on submodules updates
.gitmodules, we lost track of the fact that we did so and relied on
stale fsmonitor data.
(merge 43f1180814 bp/mv-submodules-with-fsmonitor later to maint).
* Fix for a long-standing bug that leaves the index file corrupt when
it shrinks during a partial commit.
(merge 6c003d6ffb jk/reopen-tempfile-truncate later to maint).
* Further fix for O_APPEND emulation on Windows
(merge eeaf7ddac7 js/mingw-o-append later to maint).
* A corner case bugfix in "git rerere" code.
(merge ad2bf0d9b4 en/rerere-multi-stage-1-fix later to maint).
* "git add ':(attr:foo)'" is not supported and is supposed to be
rejected while the command line arguments are parsed, but we fail
to reject such a command line upfront.
(merge 84d938b732 nd/attr-pathspec-fix later to maint).
* Recent update broke the reachability algorithm when refs (e.g.
tags) that point at objects that are not commit were involved,
which has been fixed.
* "git rebase" etc. in Git 2.19 fails to abort when given an empty
commit log message as result of editing, which has been corrected.
(merge a3ec9eaf38 en/sequencer-empty-edit-result-aborts later to maint).
* The code to backfill objects in lazily cloned repository did not
work correctly, which has been corrected.
(merge e68302011c jt/lazy-object-fetch-fix later to maint).
* Update error messages given by "git remote" and make them consistent.
(merge 5025425dff ms/remote-error-message-update later to maint).
* "git update-ref" learned to make both "--no-deref" and "--stdin"
work at the same time.
(merge d345e9fbe7 en/update-ref-no-deref-stdin later to maint).
* Recently added "range-diff" had a corner-case bug to cause it
segfault, which has been corrected.
(merge e467a90c7a tg/range-diff-corner-case-fix later to maint).
* The recently introduced commit-graph auxiliary data is incompatible
with mechanisms such as replace & grafts that "breaks" immutable
nature of the object reference relationship. Disable optimizations
based on its use (and updating existing commit-graph) when these
incompatible features are in use in the repository.
(merge 829a321569 ds/commit-graph-with-grafts later to maint).
* The mailmap file update.
(merge 255eb03edf jn/mailmap-update later to maint).
* The code in "git status" sometimes hit an assertion failure. This
was caused by a structure that was reused without cleaning the data
used for the first run, which has been corrected.
(merge 3e73cc62c0 en/status-multiple-renames-to-the-same-target-fix later to maint).
* "git fetch $repo $object" in a partial clone did not correctly
fetch the asked-for object that is referenced by an object in
promisor packfile, which has been fixed.
* A corner-case bugfix.
(merge c5cbb27cb5 sm/show-superproject-while-conflicted later to maint).
* Various fixes to "diff --color-moved-ws".
* A partial clone that is configured to lazily fetch missing objects
will on-demand issue a "git fetch" request to the originating
repository to fill not-yet-obtained objects. The request has been
optimized for requesting a tree object (and not the leaf blob
objects contained in it) by telling the originating repository that
no blobs are needed.
(merge 4c7f9567ea jt/non-blob-lazy-fetch later to maint).
* The codepath to support the experimental split-index mode had
remaining "racily clean" issues fixed.
(merge 4c490f3d32 sg/split-index-racefix later to maint).
* "git log --graph" showing an octopus merge sometimes miscounted the
number of display columns it is consuming to show the merge and its
parent commits, which has been corrected.
(merge 04005834ed np/log-graph-octopus-fix later to maint).
* "git range-diff" did not work well when the compared ranges had
changes in submodules and the "--submodule=log" was used.
* The implementation of run_command() API on the UNIX platforms had a
bug that caused a command not on $PATH to be found in the current
directory.
(merge f67b980771 jk/run-command-notdot later to maint).
* A mutex used in "git pack-objects" were not correctly initialized
and this caused "git repack" to dump core on Windows.
(merge 34204c8166 js/pack-objects-mutex-init-fix later to maint).
* Under certain circumstances, "git diff D:/a/b/c D:/a/b/d" on
Windows would strip initial parts from the paths because they
were not recognized as absolute, which has been corrected.
(merge ffd04e92e2 js/diff-notice-has-drive-prefix later to maint).
* The receive.denyCurrentBranch=updateInstead codepath kicked in even
when the push should have been rejected due to other reasons, such
as it does not fast-forward or the update-hook rejects it, which
has been corrected.
(merge b072a25fad jc/receive-deny-current-branch-fix later to maint).
* The logic to determine the archive type "git archive" uses did not
correctly kick in for "git archive --remote", which has been
corrected.
* "git repack" in a shallow clone did not correctly update the
shallow points in the repository, leading to a repository that
does not pass fsck.
(merge 5dcfbf564c js/shallow-and-fetch-prune later to maint).
* Some codepaths failed to form a proper URL when .gitmodules record
the URL to a submodule repository as relative to the repository of
superproject, which has been corrected.
(merge e0a862fdaf sb/submodule-url-to-absolute later to maint).
* "git fetch" over protocol v2 into a shallow repository failed to
fetch full history behind a new tip of history that was diverged
before the cut-off point of the history that was previously fetched
shallowly.
* The command line completion machinery (in contrib/) has been
updated to allow the completion script to tweak the list of options
that are reported by the parse-options machinery correctly.
(merge 276b49ff34 nd/completion-negation later to maint).
* Operations on promisor objects make sense in the context of only a
small subset of the commands that internally use the revisions
machinery, but the "--exclude-promisor-objects" option were taken
and led to nonsense results by commands like "log", to which it
didn't make much sense. This has been corrected.
(merge 669b1d2aae md/exclude-promisor-objects-fix later to maint).
* A regression in Git 2.12 era made "git fsck" fall into an infinite
loop while processing truncated loose objects.
(merge 18ad13e5b2 jk/detect-truncated-zlib-input later to maint).
* "git ls-remote $there foo" was broken by recent update for the
protocol v2 and stopped showing refs that match 'foo' that are not
refs/{heads,tags}/foo, which has been fixed.
(merge 6a139cdd74 jk/proto-v2-ref-prefix-fix later to maint).
* Additional comment on a tricky piece of code to help developers.
(merge 0afbe3e806 jk/stream-pack-non-delta-clarification later to maint).
* A couple of tests used to leave the repository in a state that is
deliberately corrupt, which have been corrected.
(merge aa984dbe5e ab/pack-tests-cleanup later to maint).
* The submodule support has been updated to read from the blob at
HEAD:.gitmodules when the .gitmodules file is missing from the
working tree.
(merge 2b1257e463 ao/submodule-wo-gitmodules-checked-out later to maint).
* "git fetch" was a bit loose in parsing responses from the other side
when talking over the protocol v2.
* "git rev-parse --exclude=* --branches --branches" (i.e. first
saying "add only things that do not match '*' out of all branches"
and then adding all branches, without any exclusion this time)
worked as expected, but "--exclude=* --all --all" did not work the
same way, which has been fixed.
(merge 5221048092 ag/rev-parse-all-exclude-fix later to maint).
* "git send-email --transfer-encoding=..." in recent versions of Git
sometimes produced an empty "Content-Transfer-Encoding:" header,
which has been corrected.
(merge 3c88e46f1a al/send-email-auto-cte-fixup later to maint).
* The interface into "xdiff" library used to discover the offset and
size of a generated patch hunk by first formatting it into the
textual hunk header "@@ -n,m +k,l @@" and then parsing the numbers
out. A new interface has been introduced to allow callers a more
direct access to them.
(merge 5eade0746e jk/xdiff-interface later to maint).
* Pathspec matching against a tree object were buggy when negative
pathspec elements were involved, which has been fixed.
(merge b7845cebc0 nd/tree-walk-path-exclusion later to maint).
* "git merge" and "git pull" that merges into an unborn branch used
to completely ignore "--verify-signatures", which has been
corrected.
(merge 01a31f3bca jk/verify-sig-merge-into-void later to maint).
* "git rebase --autostash" did not correctly re-attach the HEAD at times.
* "rev-parse --exclude=<pattern> --branches=<pattern>" etc. did not
quite work, which has been corrected.
(merge 9ab9b5df0e ra/rev-parse-exclude-glob later to maint).
* When editing a patch in a "git add -i" session, a hunk could be
made to no-op. The "git apply" program used to reject a patch with
such a no-op hunk to catch user mistakes, but it is now updated to
explicitly allow a no-op hunk in an edited patch.
(merge 22cb3835b9 js/apply-recount-allow-noop later to maint).
* The URL to an MSDN page in a comment has been updated.
(merge 2ef2ae2917 js/mingw-msdn-url later to maint).
* "git ls-remote --sort=<thing>" can feed an object that is not yet
available into the comparison machinery and segfault, which has
been corrected to check such a request upfront and reject it.
* When "git bundle" aborts due to an empty commit ranges
(i.e. resulting in an empty pack), it left a file descriptor to an
lockfile open, which resulted in leftover lockfile on Windows where
you cannot remove a file with an open file descriptor. This has
been corrected.
(merge 2c8ee1f53c jk/close-duped-fd-before-unlock-for-bundle later to maint).
* "git format-patch --stat=<width>" can be used to specify the width
used by the diffstat (shown in the cover letter).
(merge 284aeb7e60 nd/format-patch-cover-letter-stat-width later to maint).
* The way .git/index and .git/sharedindex* files were initially
created gave these files different perm bits until they were
adjusted for shared repository settings. This was made consistent.
(merge c9d6c78870 cc/shared-index-permbits later to maint).
* "git rebase --stat" to transplant a piece of history onto a totally
unrelated history were not working before and silently showed wrong
result. With the recent reimplementation in C, it started to instead
die with an error message, as the original logic was not prepared
to cope with this case. This has now been fixed.
* The advice message to tell the user to migrate an existing graft
file to the replace system when a graft file was read was shown
even when "git replace --convert-graft-file" command, which is the
way the message suggests to use, was running, which made little
sense.
(merge 8821e90a09 ab/replace-graft-with-replace-advice later to maint).
* "git diff --raw" lost ellipses to adjust the output columns for
some time now, but the documentation still showed them.
* Code cleanup, docfix, build fix, etc.
Changes:
Git v2.19.2 Release Notes
=========================
Fixes since v2.19.1
-------------------
* "git interpret-trailers" and its underlying machinery had a buggy
code that attempted to ignore patch text after commit log message,
which triggered in various codepaths that will always get the log
message alone and never get such an input.
* "git rebase -i" did not clear the state files correctly when a run
of "squash/fixup" is aborted and then the user manually amended the
commit instead, which has been corrected.
* When fsmonitor is in use, after operation on submodules updates
.gitmodules, we lost track of the fact that we did so and relied on
stale fsmonitor data.
* Fix for a long-standing bug that leaves the index file corrupt when
it shrinks during a partial commit.
* Further fix for O_APPEND emulation on Windows
* A corner case bugfix in "git rerere" code.
* "git add ':(attr:foo)'" is not supported and is supposed to be
rejected while the command line arguments are parsed, but we fail
to reject such a command line upfront.
* "git rebase" etc. in Git 2.19 fails to abort when given an empty
commit log message as result of editing, which has been corrected.
* The code to backfill objects in lazily cloned repository did not
work correctly, which has been corrected.
* Update error messages given by "git remote" and make them consistent.
* "git update-ref" learned to make both "--no-deref" and "--stdin"
work at the same time.
* Recently added "range-diff" had a corner-case bug to cause it
segfault, which has been corrected.
* The recently introduced commit-graph auxiliary data is incompatible
with mechanisms such as replace & grafts that "breaks" immutable
nature of the object reference relationship. Disable optimizations
based on its use (and updating existing commit-graph) when these
incompatible features are in use in the repository.
* The mailmap file update.
* The code in "git status" sometimes hit an assertion failure. This
was caused by a structure that was reused without cleaning the data
used for the first run, which has been corrected.
* A corner-case bugfix.
* A partial clone that is configured to lazily fetch missing objects
will on-demand issue a "git fetch" request to the originating
repository to fill not-yet-obtained objects. The request has been
optimized for requesting a tree object (and not the leaf blob
objects contained in it) by telling the originating repository that
no blobs are needed.
* The codepath to support the experimental split-index mode had
remaining "racily clean" issues fixed.
* "git log --graph" showing an octopus merge sometimes miscounted the
number of display columns it is consuming to show the merge and its
parent commits, which has been corrected.
* The implementation of run_command() API on the UNIX platforms had a
bug that caused a command not on $PATH to be found in the current
directory.
* A mutex used in "git pack-objects" were not correctly initialized
and this caused "git repack" to dump core on Windows.
* Under certain circumstances, "git diff D:/a/b/c D:/a/b/d" on
Windows would strip initial parts from the paths because they
were not recognized as absolute, which has been corrected.
* The receive.denyCurrentBranch=updateInstead codepath kicked in even
when the push should have been rejected due to other reasons, such
as it does not fast-forward or the update-hook rejects it, which
has been corrected.
* "git repack" in a shallow clone did not correctly update the
shallow points in the repository, leading to a repository that
does not pass fsck.
* Operations on promisor objects make sense in the context of only a
small subset of the commands that internally use the revisions
machinery, but the "--exclude-promisor-objects" option were taken
and led to nonsense results by commands like "log", to which it
didn't make much sense. This has been corrected.
* The "container" mode of TravisCI is going away. Our .travis.yml
file is getting prepared for the transition.
* Our test scripts can now take the '-V' option as a synonym for the
'--verbose-log' option.
* A regression in Git 2.12 era made "git fsck" fall into an infinite
loop while processing truncated loose objects.
Also contains various documentation updates and code clean-ups.
These releases fix a security flaw (CVE-2018-17456), which allowed an
attacker to execute arbitrary code by crafting a malicious .gitmodules
file in a project cloned with --recurse-submodules.
When running "git clone --recurse-submodules", Git parses the supplied
.gitmodules file for a URL field and blindly passes it as an argument
to a "git clone" subprocess. If the URL field is set to a string that
begins with a dash, this "git clone" subprocess interprets the URL as
an option. This can lead to executing an arbitrary script shipped in
the superproject as the user who ran "git clone".
In addition to fixing the security issue for the user running "clone",
the 2.17.2, 2.18.1 and 2.19.1 releases have an "fsck" check which can
be used to detect such malicious repository content when fetching or
accepting a push. See "transfer.fsckObjects" in git-config(1).
Credit for finding and fixing this vulnerability goes to joernchen
and Jeff King, respectively.
Git 2.19 Release Notes
Updates since v2.18
-------------------
UI, Workflows & Features
* "git diff" compares the index and the working tree. For paths
added with intent-to-add bit, the command shows the full contents
of them as added, but the paths themselves were not marked as new
files. They are now shown as new by default.
"git apply" learned the "--intent-to-add" option so that an
otherwise working-tree-only application of a patch will add new
paths to the index marked with the "intent-to-add" bit.
* "git grep" learned the "--column" option that gives not just the
line number but the column number of the hit.
* The "-l" option in "git branch -l" is an unfortunate short-hand for
"--create-reflog", but many users, both old and new, somehow expect
it to be something else, perhaps "--list". This step warns when "-l"
is used as a short-hand for "--create-reflog" and warns about the
future repurposing of the it when it is used.
* The userdiff pattern for .php has been updated.
* The content-transfer-encoding of the message "git send-email" sends
out by default was 8bit, which can cause trouble when there is an
overlong line to bust RFC 5322/2822 limit. A new option 'auto' to
automatically switch to quoted-printable when there is such a line
in the payload has been introduced and is made the default.
* "git checkout" and "git worktree add" learned to honor
checkout.defaultRemote when auto-vivifying a local branch out of a
remote tracking branch in a repository with multiple remotes that
have tracking branches that share the same names.
(merge 8d7b558bae ab/checkout-default-remote later to maint).
* "git grep" learned the "--only-matching" option.
* "git rebase --rebase-merges" mode now handles octopus merges as
well.
* Add a server-side knob to skip commits in exponential/fibbonacci
stride in an attempt to cover wider swath of history with a smaller
number of iterations, potentially accepting a larger packfile
transfer, instead of going back one commit a time during common
ancestor discovery during the "git fetch" transaction.
(merge 42cc7485a2 jt/fetch-negotiator-skipping later to maint).
* A new configuration variable core.usereplacerefs has been added,
primarily to help server installations that want to ignore the
replace mechanism altogether.
* Teach "git tag -s" etc. a few configuration variables (gpg.format
that can be set to "openpgp" or "x509", and gpg.<format>.program
that is used to specify what program to use to deal with the format)
to allow x.509 certs with CMS via "gpgsm" to be used instead of
openpgp via "gnupg".
* Many more strings are prepared for l10n.
* "git p4 submit" learns to ask its own pre-submit hook if it should
continue with submitting.
* The test performed at the receiving end of "git push" to prevent
bad objects from entering repository can be customized via
receive.fsck.* configuration variables; we now have gained a
counterpart to do the same on the "git fetch" side, with
fetch.fsck.* configuration variables.
* "git pull --rebase=interactive" learned "i" as a short-hand for
"interactive".
* "git instaweb" has been adjusted to run better with newer Apache on
RedHat based distros.
* "git range-diff" is a reimplementation of "git tbdiff" that lets us
compare individual patches in two iterations of a topic.
* The sideband code learned to optionally paint selected keywords at
the beginning of incoming lines on the receiving end.
* "git branch --list" learned to take the default sort order from the
'branch.sort' configuration variable, just like "git tag --list"
pays attention to 'tag.sort'.
* "git worktree" command learned "--quiet" option to make it less
verbose.
Performance, Internal Implementation, Development Support etc.
* The bulk of "git submodule foreach" has been rewritten in C.
* The in-core "commit" object had an all-purpose "void *util" field,
which was tricky to use especially in library-ish part of the
code. All of the existing uses of the field has been migrated to a
more dedicated "commit-slab" mechanism and the field is eliminated.
* A less often used command "git show-index" has been modernized.
(merge fb3010c31f jk/show-index later to maint).
* The conversion to pass "the_repository" and then "a_repository"
throughout the object access API continues.
* Continuing with the idea to programatically enumerate various
pieces of data required for command line completion, teach the
codebase to report the list of configuration variables
subcommands care about to help complete them.
* Separate "rebase -p" codepath out of "rebase -i" implementation to
slim down the latter and make it easier to manage.
* Make refspec parsing codepath more robust.
* Some flaky tests have been fixed.
* Continuing with the idea to programmatically enumerate various
pieces of data required for command line completion, the codebase
has been taught to enumerate options prefixed with "--no-" to
negate them.
* Build and test procedure for netrc credential helper (in contrib/)
has been updated.
* Remove unused function definitions and declarations from ewah
bitmap subsystem.
* Code preparation to make "git p4" closer to be usable with Python 3.
* Tighten the API to make it harder to misuse in-tree .gitmodules
file, even though it shares the same syntax with configuration
files, to read random configuration items from it.
* "git fast-import" has been updated to avoid attempting to create
delta against a zero-byte-long string, which is pointless.
* The codebase has been updated to compile cleanly with -pedantic
option.
(merge 2b647a05d7 bb/pedantic later to maint).
* The character display width table has been updated to match the
latest Unicode standard.
(merge 570951eea2 bb/unicode-11-width later to maint).
* test-lint now looks for broken use of "VAR=VAL shell_func" in test
scripts.
* Conversion from uchar[40] to struct object_id continues.
* Recent "security fix" to pay attention to contents of ".gitmodules"
while accepting "git push" was a bit overly strict than necessary,
which has been adjusted.
* "git fsck" learns to make sure the optional commit-graph file is in
a sane state.
* "git diff --color-moved" feature has further been tweaked.
* Code restructuring and a small fix to transport protocol v2 during
fetching.
* Parsing of -L[<N>][,[<M>]] parameters "git blame" and "git log"
take has been tweaked.
* lookup_commit_reference() and friends have been updated to find
in-core object for a specific in-core repository instance.
* Various glitches in the heuristics of merge-recursive strategy have
been documented in new tests.
* "git fetch" learned a new option "--negotiation-tip" to limit the
set of commits it tells the other end as "have", to reduce wasted
bandwidth and cycles, which would be helpful when the receiving
repository has a lot of refs that have little to do with the
history at the remote it is fetching from.
* For a large tree, the index needs to hold many cache entries
allocated on heap. These cache entries are now allocated out of a
dedicated memory pool to amortize malloc(3) overhead.
* Tests to cover various conflicting cases have been added for
merge-recursive.
* Tests to cover conflict cases that involve submodules have been
added for merge-recursive.
* Look for broken "&&" chains that are hidden in subshell, many of
which have been found and corrected.
* The singleton commit-graph in-core instance is made per in-core
repository instance.
* "make DEVELOPER=1 DEVOPTS=pedantic" allows developers to compile
with -pedantic option, which may catch more problematic program
constructs and potential bugs.
* Preparatory code to later add json output for telemetry data has
been added.
* Update the way we use Coccinelle to find out-of-style code that
need to be modernised.
* It is too easy to misuse system API functions such as strcat();
these selected functions are now forbidden in this codebase and
will cause a compilation failure.
* Add a script (in contrib/) to help users of VSCode work better with
our codebase.
* The Travis CI scripts were taught to ship back the test data from
failed tests.
(merge aea8879a6a sg/travis-retrieve-trash-upon-failure later to maint).
* The parse-options machinery learned to refrain from enclosing
placeholder string inside a "<bra" and "ket>" pair automatically
without PARSE_OPT_LITERAL_ARGHELP. Existing help text for option
arguments that are not formatted correctly have been identified and
fixed.
(merge 5f0df44cd7 rs/parse-opt-lithelp later to maint).
* Noiseword "extern" has been removed from function decls in the
header files.
* A few atoms like %(objecttype) and %(objectsize) in the format
specifier of "for-each-ref --format=<format>" can be filled without
getting the full contents of the object, but just with the object
header. These cases have been optimized by calling
oid_object_info() API (instead of reading and inspecting the data).
* The end result of documentation update has been made to be
inspected more easily to help developers.
* The API to iterate over all objects learned to optionally list
objects in the order they appear in packfiles, which helps locality
of access if the caller accesses these objects while as objects are
enumerated.
* Improve built-in facility to catch broken &&-chain in the tests.
* The more library-ish parts of the codebase learned to work on the
in-core index-state instance that is passed in by their callers,
instead of always working on the singleton "the_index" instance.
* A test prerequisite defined by various test scripts with slightly
different semantics has been consolidated into a single copy and
made into a lazily defined one.
(merge 6ec633059a wc/make-funnynames-shared-lazy-prereq later to maint).
* After a partial clone, repeated fetches from promisor remote would
have accumulated many packfiles marked with .promisor bit without
getting them coalesced into fewer packfiles, hurting performance.
"git repack" now learned to repack them.
* Partially revert the support for multiple hash functions to regain
hash comparison performance; we'd think of a way to do this better
in the next cycle.
* "git help --config" (which is used in command line completion)
missed the configuration variables not described in the main
config.txt file but are described in another file that is included
by it, which has been corrected.
* The test linter code has learned that the end of here-doc mark
"EOF" can be quoted in a double-quote pair, not just in a
single-quote pair.
2.18.0:
UI, Workflows & Features
* Rename detection logic that is used in "merge" and "cherry-pick" has
learned to guess when all of x/a, x/b and x/c have moved to z/a,
z/b and z/c, it is likely that x/d added in the meantime would also
want to move to z/d by taking the hint that the entire directory
'x' moved to 'z'. A bug causing dirty files involved in a rename
to be overwritten during merge has also been fixed as part of this
work. Incidentally, this also avoids updating a file in the
working tree after a (non-trivial) merge whose result matches what
our side originally had.
* "git filter-branch" learned to use a different exit code to allow
the callers to tell the case where there was no new commits to
rewrite from other error cases.
* When built with more recent cURL, GIT_SSL_VERSION can now specify
"tlsv1.3" as its value.
* "git gui" learned that "~/.ssh/id_ecdsa.pub" and
"~/.ssh/id_ed25519.pub" are also possible SSH key files.
(merge 2e2f0288ef bb/git-gui-ssh-key-files later to maint).
* "git gui" performs commit upon CTRL/CMD+ENTER but the
CTRL/CMD+KP_ENTER (i.e. enter key on the numpad) did not have the
same key binding. It now does.
(merge 28a1d94a06 bp/git-gui-bind-kp-enter later to maint).
* "git gui" has been taught to work with old versions of tk (like
8.5.7) that do not support "ttk::style theme use" as a way to query
the current theme.
(merge 4891961105 cb/git-gui-ttk-style later to maint).
* "git rebase" has learned to honor "--signoff" option when using
backends other than "am" (but not "--preserve-merges").
* "git branch --list" during an interrupted "rebase -i" now lets
users distinguish the case where a detached HEAD is being rebased
and a normal branch is being rebased.
* "git mergetools" learned talking to guiffy.
* The scripts in contrib/emacs/ have outlived their usefulness and
have been replaced with a stub that errors out and tells the user
there are replacements.
* The new "working-tree-encoding" attribute can ask Git to convert the
contents to the specified encoding when checking out to the working
tree (and the other way around when checking in).
* The "git config" command uses separate options e.g. "--int",
"--bool", etc. to specify what type the caller wants the value to
be interpreted as. A new "--type=<typename>" option has been
introduced, which would make it cleaner to define new types.
* "git config --get" learned the "--default" option, to help the
calling script. Building on top of the above changes, the
"git config" learns "--type=color" type. Taken together, you can
do things like "git config --get foo.color --default blue" and get
the ANSI color sequence for the color given to foo.color variable,
or "blue" if the variable does not exist.
* "git ls-remote" learned an option to allow sorting its output based
on the refnames being shown.
* The command line completion (in contrib/) has been taught that "git
stash save" has been deprecated ("git stash push" is the preferred
spelling in the new world) and does not offer it as a possible
completion candidate when "git stash push" can be.
* "git gc --prune=nonsense" spent long time repacking and then
silently failed when underlying "git prune --expire=nonsense"
failed to parse its command line. This has been corrected.
* Error messages from "git push" can be painted for more visibility.
* "git http-fetch" (deprecated) had an optional and experimental
"feature" to fetch only commits and/or trees, which nobody used.
This has been removed.
* The functionality of "$GIT_DIR/info/grafts" has been superseded by
the "refs/replace/" mechanism for some time now, but the internal
code had support for it in many places, which has been cleaned up
in order to drop support of the "grafts" mechanism.
* "git worktree add" learned to check out an existing branch.
* "git --no-pager cmd" did not have short-and-sweet single letter
option. Now it does as "-P".
(merge 7213c28818 js/no-pager-shorthand later to maint).
* "git rebase" learned "--rebase-merges" to transplant the whole
topology of commit graph elsewhere.
* "git status" learned to pay attention to UI related diff
configuration variables such as diff.renames.
* The command line completion mechanism (in contrib/) learned to load
custom completion file for "git $command" where $command is a
custom "git-$command" that the end user has on the $PATH when using
newer version of bash-completion.
* "git send-email" can sometimes offer confirmation dialog "Send this
email?" with choices 'Yes', 'No', 'Quit', and 'All'. A new action
'Edit' has been added to this dialog's choice.
* With merge.renames configuration set to false, the recursive merge
strategy can be told not to spend cycles trying to find renamed
paths and merge them accordingly.
* "git status" learned to honor a new status.renames configuration to
skip rename detection, which could be useful for those who want to
do so without disabling the default rename detection done by the
"git diff" command.
* Command line completion (in contrib/) learned to complete pathnames
for various commands better.
* "git blame" learns to unhighlight uninteresting metadata from the
originating commit on lines that are the same as the previous one,
and also paint lines in different colors depending on the age of
the commit.
* Transfer protocol v2 learned to support the partial clone.
* When a short hexadecimal string is used to name an object but there
are multiple objects that share the string as the prefix of their
names, the code lists these ambiguous candidates in a help message.
These object names are now sorted according to their types for
easier eyeballing.
* "git fetch $there $refspec" that talks over protocol v2 can take
advantage of server-side ref filtering; the code has been extended
so that this mechanism triggers also when fetching with configured
refspec.
* Our HTTP client code used to advertise that we accept gzip encoding
from the other side; instead, just let cURL library to advertise
and negotiate the best one.
* "git p4" learned to "unshelve" shelved commit from P4.
(merge 123f631761 ld/p4-unshelve later to maint).
Git v2.17.1:
Fixes:
* This release contains the same fixes made in the v2.13.7 version of
Git, covering CVE-2018-11233 and 11235, and forward-ported to
v2.14.4, v2.15.2 and v2.16.4 releases. See release notes to
v2.13.7 for details.
* In addition to the above fixes, this release has support on the
server side to reject pushes to repositories that attempt to create
such problematic .gitmodules file etc. as tracked contents, to help
hosting sites protect their customers by preventing malicious
contents from spreading.
Git 2.17:
UI, Workflows & Features
* "diff" family of commands learned "--find-object=<object-id>" option
to limit the findings to changes that involve the named object.
* "git format-patch" learned to give 72-cols to diffstat, which is
consistent with other line length limits the subcommand uses for
its output meant for e-mails.
* The log from "git daemon" can be redirected with a new option; one
relevant use case is to send the log to standard error (instead of
syslog) when running it from inetd.
* "git rebase" learned to take "--allow-empty-message" option.
* "git am" has learned the "--quit" option, in addition to the
existing "--abort" option; having the pair mirrors a few other
commands like "rebase" and "cherry-pick".
* "git worktree add" learned to run the post-checkout hook, just like
"git clone" runs it upon the initial checkout.
* "git tag" learned an explicit "--edit" option that allows the
message given via "-m" and "-F" to be further edited.
* "git fetch --prune-tags" may be used as a handy short-hand for
getting rid of stale tags that are locally held.
* The new "--show-current-patch" option gives an end-user facing way
to get the diff being applied when "git rebase" (and "git am")
stops with a conflict.
* "git add -p" used to offer "/" (look for a matching hunk) as a
choice, even there was only one hunk, which has been corrected.
Also the single-key help is now given only for keys that are
enabled (e.g. help for '/' won't be shown when there is only one
hunk).
* Since Git 1.7.9, "git merge" defaulted to --no-ff (i.e. even when
the side branch being merged is a descendant of the current commit,
create a merge commit instead of fast-forwarding) when merging a
tag object. This was appropriate default for integrators who pull
signed tags from their downstream contributors, but caused an
unnecessary merges when used by downstream contributors who
habitually "catch up" their topic branches with tagged releases
from the upstream. Update "git merge" to default to --no-ff only
when merging a tag object that does *not* sit at its usual place in
refs/tags/ hierarchy, and allow fast-forwarding otherwise, to
mitigate the problem.
* "git status" can spend a lot of cycles to compute the relation
between the current branch and its upstream, which can now be
disabled with "--no-ahead-behind" option.
* "git diff" and friends learned funcname patterns for Go language
source files.
* "git send-email" learned "--reply-to=<address>" option.
* Funcname pattern used for C# now recognizes "async" keyword.
* In a way similar to how "git tag" learned to honor the pager
setting only in the list mode, "git config" learned to ignore the
pager setting when it is used for setting values (i.e. when the
purpose of the operation is not to "show").
Performance, Internal Implementation, Development Support etc.
* More perf tests for threaded grep
* "perf" test output can be sent to codespeed server.
* The build procedure for perl/ part has been greatly simplified by
weaning ourselves off of MakeMaker.
* Perl 5.8 or greater has been required since Git 1.7.4 released in
2010, but we continued to assume some core modules may not exist and
used a conditional "eval { require <<module>> }"; we no longer do
this. Some platforms (Fedora/RedHat/CentOS, for example) ship Perl
without all core modules by default (e.g. Digest::MD5, File::Temp,
File::Spec, Net::Domain, Net::SMTP). Users on such platforms may
need to install these additional modules.
* As a convenience, we install copies of Perl modules we require which
are not part of the core Perl distribution (e.g. Error and
Mail::Address). Users and packagers whose operating system provides
these modules can set NO_PERL_CPAN_FALLBACKS to avoid installing the
bundled modules.
* In preparation for implementing narrow/partial clone, the machinery
for checking object connectivity used by gc and fsck has been
taught that a missing object is OK when it is referenced by a
packfile specially marked as coming from trusted repository that
promises to make them available on-demand and lazily.
* The machinery to clone & fetch, which in turn involves packing and
unpacking objects, has been told how to omit certain objects using
the filtering mechanism introduced by another topic. It now knows
to mark the resulting pack as a promisor pack to tolerate missing
objects, laying foundation for "narrow" clones.
* The first step to getting rid of mru API and using the
doubly-linked list API directly instead.
* Retire mru API as it does not give enough abstraction over
underlying list API to be worth it.
* Rewrite two more "git submodule" subcommands in C.
* The tracing machinery learned to report tweaking of environment
variables as well.
* Update Coccinelle rules to catch and optimize strbuf_addf(&buf, "%s", str)
* Prevent "clang-format" from breaking line after function return type.
* The sequencer infrastructure is shared across "git cherry-pick",
"git rebase -i", etc., and has always spawned "git commit" when it
needs to create a commit. It has been taught to do so internally,
when able, by reusing the codepath "git commit" itself uses, which
gives performance boost for a few tens of percents in some sample
scenarios.
* Push the submodule version of collision-detecting SHA-1 hash
implementation a bit harder on builders.
* Avoid mmapping small files while using packed refs (especially ones
with zero size, which would cause later munmap() to fail).
* Conversion from uchar[20] to struct object_id continues.
* More tests for wildmatch functions.
* The code to binary search starting from a fan-out table (which is
how the packfile is indexed with object names) has been refactored
into a reusable helper.
* We now avoid using identifiers that clash with C++ keywords. Even
though it is not a goal to compile Git with C++ compilers, changes
like this help use of code analysis tools that targets C++ on our
codebase.
* The executable is now built in 'script' phase in Travis CI integration,
to follow the established practice, rather than during 'before_script'
phase. This allows the CI categorize the failures better ('failed'
is project's fault, 'errored' is build environment's).
* Writing out the index file when the only thing that changed in it
is the untracked cache information is often wasteful, and this has
been optimized out.
* Various pieces of Perl code we have have been cleaned up.
* Internal API clean-up to allow write_locked_index() optionally skip
writing the in-core index when it is not modified.
Git v2.16.3 Release Notes
* "git status" after moving a path in the working tree (hence making
it appear "removed") and then adding with the -N option (hence
making that appear "added") detected it as a rename, but did not
report the old and new pathnames correctly.
* "git commit --fixup" did not allow "-m<message>" option to be used
at the same time; allow it to annotate resulting commit with more
text.
* When resetting the working tree files recursively, the working tree
of submodules are now also reset to match.
* Fix for a commented-out code to adjust it to a rather old API change
around object ID.
* When there are too many changed paths, "git diff" showed a warning
message but in the middle of a line.
* The http tracing code, often used to debug connection issues,
learned to redact potentially sensitive information from its output
so that it can be more safely sharable.
* Crash fix for a corner case where an error codepath tried to unlock
what it did not acquire lock on.
* The split-index mode had a few corner case bugs fixed.
* Assorted fixes to "git daemon".
* Completion of "git merge -s<strategy>" (in contrib/) did not work
well in non-C locale.
* Workaround for segfault with more recent versions of SVN.
* Recently introduced leaks in fsck have been plugged.
* Travis CI integration now builds the executable in 'script' phase
to follow the established practice, rather than during
'before_script' phase. This allows the CI categorize the failures
better ('failed' is project's fault, 'errored' is build
environment's).
Git v2.16.2 Release Notes
Fixes since v2.16.1
* An old regression in "git describe --all $annotated_tag^0" has been
fixed.
* "git svn dcommit" did not take into account the fact that a
svn+ssh:// URL with a username@ (typically used for pushing) refers
to the same SVN repository without the username@ and failed when
svn.pushmergeinfo option is set.
* "git merge -Xours/-Xtheirs" learned to use our/their version when
resolving a conflicting updates to a symbolic link.
* "git clone $there $here" is allowed even when here directory exists
as long as it is an empty directory, but the command incorrectly
removed it upon a failure of the operation.
* "git stash -- <pathspec>" incorrectly blew away untracked files in
the directory that matched the pathspec, which has been corrected.
* "git add -p" was taught to ignore local changes to submodules as
they do not interfere with the partial addition of regular changes
anyway.
Git v2.16.1 Release Notes
Fixes since v2.16
* "git clone" segfaulted when cloning a project that happens to
track two paths that differ only in case on a case insensitive
filesystem.
Git 2.16 Release Notes
Backward compatibility notes and other notable changes.
* Use of an empty string as a pathspec element that is used for
'everything matches' is now an error.
Updates since v2.15
UI, Workflows & Features
* An empty string as a pathspec element that means "everything"
i.e. 'git add ""', is now illegal. We started this by first
deprecating and warning a pathspec that has such an element in
2.11 (Nov 2016).
* A hook script that is set unexecutable is simply ignored. Git
notifies when such a file is ignored, unless the message is
squelched via advice.ignoredHook configuration.
* "git pull" has been taught to accept "--[no-]signoff" option and
pass it down to "git merge".
* The "--push-option=<string>" option to "git push" now defaults to a
list of strings configured via push.pushOption variable.
* "gitweb" checks if a directory is searchable with Perl's "-x"
operator, which can be enhanced by using "filetest 'access'"
pragma, which now we do.
* "git stash save" has been deprecated in favour of "git stash push".
* The set of paths output from "git status --ignored" was tied
closely with its "--untracked=<mode>" option, but now it can be
controlled more flexibly. Most notably, a directory that is
ignored because it is listed to be ignored in the ignore/exclude
mechanism can be handled differently from a directory that ends up
to be ignored only because all files in it are ignored.
* The remote-helper for talking to MediaWiki has been updated to
truncate an overlong pagename so that ".mw" suffix can still be
added.
* The remote-helper for talking to MediaWiki has been updated to
work with mediawiki namespaces.
* The "--format=..." option "git for-each-ref" takes learned to show
the name of the 'remote' repository and the ref at the remote side
that is affected for 'upstream' and 'push' via "%(push:remotename)"
and friends.
* Doc and message updates to teach users "bisect view" is a synonym
for "bisect visualize".
* "git bisect run" that did not specify any command to run used to go
ahead and treated all commits to be tested as 'good'. This has
been corrected by making the command error out.
* The SubmittingPatches document has been converted to produce an
HTML version via AsciiDoc/Asciidoctor.
* We learned to optionally talk to a file system monitor via new
fsmonitor extension to speed up "git status" and other operations
that need to see which paths have been modified. Currently we only
support "watchman". See File System Monitor section of
git-update-index(1) for more detail.
* The "diff" family of commands learned to ignore differences in
carriage return at the end of line.
* Places that know about "sendemail.to", like documentation and shell
completion (in contrib/) have been taught about "sendemail.tocmd",
too.
* "git add --renormalize ." is a new and safer way to record the fact
that you are correcting the end-of-line convention and other
"convert_to_git()" glitches in the in-repository data.
* "git branch" and "git checkout -b" are now forbidden from creating
a branch whose name is "HEAD".
* "git branch --list" learned to show its output through the pager by
default when the output is going to a terminal, which is controlled
by the pager.branch configuration variable. This is similar to a
recent change to "git tag --list".
* "git grep -W", "git diff -W" and their friends learned a heuristic
to extend a pre-context beyond the line that matches the "function
pattern" (aka "diff.*.xfuncname") to include a comment block, if
exists, that immediately precedes it.
* "git config --expiry-date gc.reflogexpire" can read "2.weeks" from
the configuration and report it as a timestamp, just like "--int"
would read "1k" and report 1024, to help consumption by scripts.
* The shell completion (in contrib/) learned that "git pull" can take
the "--autostash" option.
* The tagnames "git log --decorate" uses to annotate the commits can
now be limited to subset of available refs with the two additional
options, --decorate-refs[-exclude]=<pattern>.
* "git grep" compiled with libpcre2 sometimes triggered a segfault,
which is being fixed.
* "git send-email" tries to see if the sendmail program is available
in /usr/lib and /usr/sbin; extend the list of locations to be
checked to also include directories on $PATH.
* "git diff" learned, "--anchored", a variant of the "--patience"
algorithm, to which the user can specify which 'unique' line to be
used as anchoring points.
* The way "git worktree add" determines what branch to create from
where and checkout in the new worktree has been updated a bit.
* Ancient part of codebase still shows dots after an abbreviated
object name just to show that it is not a full object name, but
these ellipses are confusing to people who newly discovered Git
who are used to seeing abbreviated object names and find them
confusing with the range syntax.
* With a configuration variable rebase.abbreviateCommands set,
"git rebase -i" produces the todo list with a single-letter
command names.
* "git worktree add" learned to run the post-checkout hook, just like
"git checkout" does, after the initial checkout.
* "git svn" has been updated to strip CRs in the commit messages, as
recent versions of Subversion rejects them.
* "git imap-send" did not correctly quote the folder name when
making a request to the server, which has been corrected.
* Error messages from "git rebase" have been somewhat cleaned up.
* Git has been taught to support an https:// URL used for http.proxy
when using recent versions of libcurl.
* "git merge" learned to pay attention to merge.verifySignatures
configuration variable and pretend as if '--verify-signatures'
option was given from the command line.
* "git describe" was taught to dig trees deeper to find a
<commit-ish>:<path> that refers to a given blob object.
Git v2.15.1 Release Notes
Fixes since v2.15
-----------------
* TravisCI build updates.
* "auto" as a value for the columnar output configuration ought to
judge "is the output consumed by humans?" with the same criteria as
"auto" for coloured output configuration, i.e. either the standard
output stream is going to tty, or a pager is in use. We forgot the
latter, which has been fixed.
* The experimental "color moved lines differently in diff output"
feature was buggy around "ignore whitespace changes" edges, which
has been corrected.
* Instead of using custom line comparison and hashing functions to
implement "moved lines" coloring in the diff output, use the pair
of these functions from lower-layer xdiff/ code.
* Some codepaths did not check for errors when asking what branch the
HEAD points at, which have been fixed.
* "git commit", after making a commit, did not check for errors when
asking on what branch it made the commit, which has been corrected.
* "git status --ignored -u" did not stop at a working tree of a
separate project that is embedded in an ignored directory and
listed files in that other project, instead of just showing the
directory itself as ignored.
* A broken access to object databases in recent update to "git grep
--recurse-submodules" has been fixed.
* A recent regression in "git rebase -i" that broke execution of git
commands from subdirectories via "exec" instruction has been fixed.
* "git check-ref-format --branch @{-1}" bit a "BUG()" when run
outside a repository for obvious reasons; clarify the documentation
and make sure we do not even try to expand the at-mark magic in
such a case, but still call the validation logic for branch names.
* Command line completion (in contrib/) update.
* Description of blame.{showroot,blankboundary,showemail,date}
configuration variables have been added to "git config --help".
* After an error from lstat(), diff_populate_filespec() function
sometimes still went ahead and used invalid data in struct stat,
which has been fixed.
* UNC paths are also relevant in Cygwin builds and they are now
tested just like Mingw builds.
* Correct start-up sequence so that a repository could be placed
immediately under the root directory again (which was broken at
around Git 2.13).
* The credential helper for libsecret (in contrib/) has been improved
to allow possibly prompting the end user to unlock secrets that are
currently locked (otherwise the secrets may not be loaded).
* Updates from GfW project.
* "git rebase -i" recently started misbehaving when a submodule that
is configured with 'submodule.<name>.ignore' is dirty; this has
been corrected.
* Some error messages did not quote filenames shown in it, which have
been fixed.
* Building with NO_LIBPCRE1_JIT did not disable it, which has been fixed.
* We used to add an empty alternate object database to the system
that does not help anything; it has been corrected.
* Error checking in "git imap-send" for empty response has been
improved.
* An ancient bug in "git apply --ignore-space-change" codepath has
been fixed.
* There was a recent semantic mismerge in the codepath to write out a
section of a configuration section, which has been corrected.
Git 2.15 Release 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
more explicit '.' for that instead. The hope is that existing
users will not mind this change, and eventually the warning can be
turned into a hard error, upgrading the deprecation into removal of
this (mis)feature. That is now scheduled to happen in Git v2.16,
the next major release after this one.
* Git now avoids blindly falling back to ".git" when the setup
sequence said we are _not_ in Git repository. A corner case that
happens to work right now may be broken by a call to BUG().
We've tried hard to locate such cases and fixed them, but there
might still be cases that need to be addressed--bug reports are
greatly appreciated.
* "branch --set-upstream" that has been deprecated in Git 1.8 has
finally been retired.
Updates since v2.14
-------------------
UI, Workflows & Features
* An example that is now obsolete has been removed from a sample hook,
and an old example in it that added a sign-off manually has been
improved to use the interpret-trailers command.
* The advice message given when "git rebase" stops for conflicting
changes has been improved.
* The "rerere-train" script (in contrib/) learned the "--overwrite"
option to allow overwriting existing recorded resolutions.
* "git contacts" (in contrib/) now lists the address on the
"Reported-by:" trailer to its output, in addition to those on
S-o-b: and other trailers, to make it easier to notify (and thank)
the original bug reporter.
* "git rebase", especially when it is run by mistake and ends up
trying to replay many changes, spent long time in silence. The
command has been taught to show progress report when it spends
long time preparing these many changes to replay (which would give
the user a chance to abort with ^C).
* "git merge" learned a "--signoff" option to add the Signed-off-by:
trailer with the committer's name.
* "git diff" learned to optionally paint new lines that are the same
as deleted lines elsewhere differently from genuinely new lines.
* "git interpret-trailers" learned to take the trailer specifications
from the command line that overrides the configured values.
* "git interpret-trailers" has been taught a "--parse" and a few
other options to make it easier for scripts to grab existing
trailer lines from a commit log message.
* The "--format=%(trailers)" option "git log" and its friends take
learned to take the 'unfold' and 'only' modifiers to normalize its
output, e.g. "git log --format=%(trailers:only,unfold)".
* "gitweb" shows a link to visit the 'raw' contents of blbos in the
history overview page.
* "[gc] rerereResolved = 5.days" used to be invalid, as the variable
is defined to take an integer counting the number of days. It now
is allowed.
* The code to acquire a lock on a reference (e.g. while accepting a
push from a client) used to immediately fail when the reference is
already locked---now it waits for a very short while and retries,
which can make it succeed if the lock holder was holding it during
a read-only operation.
* "branch --set-upstream" that has been deprecated in Git 1.8 has
finally been retired.
* The codepath to call external process filter for smudge/clean
operation learned to show the progress meter.
* "git rev-parse" learned "--is-shallow-repository", that is to be
used in a way similar to existing "--is-bare-repository" and
friends.
* "git describe --match <pattern>" has been taught to play well with
the "--all" option.
* "git branch" learned "-c/-C" to create a new branch by copying an
existing one.
* Some commands (most notably "git status") makes an opportunistic
update when performing a read-only operation to help optimize later
operations in the same repository. The new "--no-optional-locks"
option can be passed to Git to disable them.
* "git for-each-ref --format=..." learned a new format element,
%(trailers), to show only the commit log trailer part of the log
message.
Performance, Internal Implementation, Development Support etc.
...more...
Git v2.14.3 Release Notes
Fixes since v2.14.2
* A helper function to read a single whole line into strbuf
mistakenly triggered OOM error at EOF under certain conditions,
which has been fixed.
* In addition to "cc: <a@dd.re.ss> # cruft", "cc: a@dd.re.ss # cruft"
was taught to "git send-email" as a valid way to tell it that it
needs to also send a carbon copy to <a@dd.re.ss> in the trailer
section.
* Fix regression to "gitk --bisect" by a recent update.
* Unlike "git commit-tree < file", "git commit-tree -F file" did not
pass the contents of the file verbatim and instead completed an
incomplete line at the end, if exists. The latter has been updated
to match the behaviour of the former.
* "git archive", especially when used with pathspec, stored an empty
directory in its output, even though Git itself never does so.
This has been fixed.
* API error-proofing which happens to also squelch warnings from GCC.
* "git gc" tries to avoid running two instances at the same time by
reading and writing pid/host from and to a lock file; it used to
use an incorrect fscanf() format when reading, which has been
corrected.
* The test linter has been taught that we do not like "echo -e".
* Code cmp.std.c nitpick.
* "git describe --match" learned to take multiple patterns in v2.13
series, but the feature ignored the patterns after the first one
and did not work at all. This has been fixed.
* "git cat-file --textconv" started segfaulting recently, which
has been corrected.
* The built-in pattern to detect the "function header" for HTML did
not match <H1>..<H6> elements without any attributes, which has
been fixed.
* "git mailinfo" was loose in decoding quoted printable and produced
garbage when the two letters after the equal sign are not
hexadecimal. This has been fixed.
* The documentation for '-X<option>' for merges was misleadingly
written to suggest that "-s theirs" exists, which is not the case.
* Spell the name of our system as "Git" in the output from
request-pull script.
* Fixes for a handful memory access issues identified by valgrind.
* Backports a moral equivalent of 2015 fix to the poll emulation from
the upstream gnulib to fix occasional breakages on HPE NonStop.
* In the "--format=..." option of the "git for-each-ref" command (and
its friends, i.e. the listing mode of "git branch/tag"), "%(atom:)"
(e.g. "%(refname:)", "%(body:)" used to error out. Instead, treat
them as if the colon and an empty string that follows it were not
there.
* Users with "color.ui = always" in their configuration were broken
by a recent change that made plumbing commands to pay attention to
them as the patch created internally by "git add -p" were colored
(heh) and made unusable. This has been fixed.
* "git branch -M a b" while on a branch that is completely unrelated
to either branch a or branch b misbehaved when multiple worktree
was in use. This has been fixed.
* "git fast-export" with -M/-C option issued "copy" instruction on a
path that is simultaneously modified, which was incorrect.
* The checkpoint command "git fast-import" did not flush updates to
refs and marks unless at least one object was created since the
last checkpoint, which has been corrected, as these things can
happen without any new object getting created.
* The scripts to drive TravisCI has been reorganized and then an
optimization to avoid spending cycles on a branch whose tip is
tagged has been implemented.
* "git fetch <there> <src>:<dst>" allows an object name on the <src>
side when the other side accepts such a request since Git v2.5, but
the documentation was left stale.
* A regression in 2.11 that made the code to read the list of
alternate object stores overrun the end of the string has been
fixed.
Also contains various documentation updates and code clean-ups.
Fixes since v2.14.1
* Because recent Git for Windows do come with a real msgfmt, the
build procedure for git-gui has been updated to use it instead of a
hand-rolled substitute.
* "%C(color name)" in the pretty print format always produced ANSI
color escape codes, which was an early design mistake. They now
honor the configuration (e.g. "color.ui = never") and also tty-ness
of the output medium.
* The http.{sslkey,sslCert} configuration variables are to be
interpreted as a pathname that honors "~[username]/" prefix, but
weren't, which has been fixed.
* Numerous bugs in walking of reflogs via "log -g" and friends have
been fixed.
* "git commit" when seeing an totally empty message said "you did not
edit the message", which is clearly wrong. The message has been
corrected.
* When a directory is not readable, "gitweb" fails to build the
project list. Work this around by skipping such a directory.
* A recently added test for the "credential-cache" helper revealed
that EOF detection done around the time the connection to the cache
daemon is torn down were flaky. This was fixed by reacting to
ECONNRESET and behaving as if we got an EOF.
* Some versions of GnuPG fail to kill gpg-agent it auto-spawned
and such a left-over agent can interfere with a test. Work it
around by attempting to kill one before starting a new test.
* "git log --tag=no-such-tag" showed log starting from HEAD, which
has been fixed---it now shows nothing.
* The "tag.pager" configuration variable was useless for those who
actually create tag objects, as it interfered with the use of an
editor. A new mechanism has been introduced for commands to enable
pager depending on what operation is being carried out to fix this,
and then "git tag -l" is made to run pager by default.
* "git push --recurse-submodules $there HEAD:$target" was not
propagated down to the submodules, but now it is.
* Commands like "git rebase" accepted the --rerere-autoupdate option
from the command line, but did not always use it. This has been
fixed.
* "git clone --recurse-submodules --quiet" did not pass the quiet
option down to submodules.
* "git am -s" has been taught that some input may end with a trailer
block that is not Signed-off-by: and it should refrain from adding
an extra blank line before adding a new sign-off in such a case.
* "git svn" used with "--localtime" option did not compute the tz
offset for the timestamp in question and instead always used the
current time, which has been corrected.
* Memory leaks in a few error codepaths have been plugged.
* bash 4.4 or newer gave a warning on NUL byte in command
substitution done in "git stash"; this has been squelched.
* "git grep -L" and "git grep --quiet -L" reported different exit
codes; this has been corrected.
* When handshake with a subprocess filter notices that the process
asked for an unknown capability, Git did not report what program
the offending subprocess was running. This has been corrected.
* "git apply" that is used as a better "patch -p1" failed to apply a
taken from a file with CRLF line endings to a file with CRLF line
endings. The root cause was because it misused convert_to_git()
that tried to do "safe-crlf" processing by looking at the index
entry at the same path, which is a nonsense---in that mode, "apply"
is not working on the data in (or derived from) the index at all.
This has been fixed.
* Killing "git merge --edit" before the editor returns control left
the repository in a state with MERGE_MSG but without MERGE_HEAD,
which incorrectly tells the subsequent "git commit" that there was
a squash merge in progress. This has been fixed.
* "git archive" did not work well with pathspecs and the
export-ignore attribute.
* "git cvsserver" no longer is invoked by "git daemon" by default,
as it is old and largely unmaintained.
* Various Perl scripts did not use safe_pipe_capture() instead of
backticks, leaving them susceptible to end-user input. They have
been corrected.
======================
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
more explicit '.' for that instead. The hope is that existing
users will not mind this change, and eventually the warning can be
turned into a hard error, upgrading the deprecation into removal of
this (mis)feature. That is not scheduled to happen in the upcoming
release (yet).
* Git now avoids blindly falling back to ".git" when the setup
sequence said we are _not_ in Git repository. A corner case that
happens to work right now may be broken by a call to die("BUG").
We've tried hard to locate such cases and fixed them, but there
might still be cases that need to be addressed--bug reports are
greatly appreciated.
* The experiment to improve the hunk-boundary selection of textual
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
-------------------
UI, Workflows & Features
* The colors in which "git status --short --branch" showed the names
of the current branch and its remote-tracking branch are now
configurable.
* "git clone" learned the "--no-tags" option not to fetch all tags
initially, and also set up the tagopt not to follow any tags in
subsequent fetches.
* "git archive --format=zip" learned to use zip64 extension when
necessary to go beyond the 4GB limit.
* "git reset" learned "--recurse-submodules" option.
* "git diff --submodule=diff" now recurses into nested submodules.
* "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.
* There is no good reason why "git fetch $there $sha1" should fail
when the $sha1 names an object at the tip of an advertised ref,
even when the other side hasn't enabled allowTipSHA1InWant.
* The "[includeIf "gitdir:$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.
* The default packed-git limit value has been raised on larger
platforms to save "git fetch" from a (recoverable) failure while
"gc" is running in parallel.
* 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.
* Attempt to allow us notice "fishy" situation where we fail to
remove the temporary directory used during the test.
* Travis CI gained a task to format the documentation with both
AsciiDoc and AsciiDoctor.
* Some platforms have ulong that is smaller than time_t, and our
historical use of ulong for timestamp would mean they cannot
represent some timestamp that the platform allows. Invent a
separate and dedicated timestamp_t (so that we can distingiuish
timestamps and a vanilla ulongs, which along is already a good
move), and then declare uintmax_t is the type to be used as the
timestamp_t.
* We can trigger Windows auto-build tester (credits: Dscho &
Microsoft) from our existing Travis CI tester now.
* Conversion from uchar[20] to struct object_id continues.
* Simplify parse_pathspec() codepath and stop it from looking at the
default in-core index.
* Add perf-test for wildmatch.
* Code from "conversion using external process" codepath has been
extracted to a separate sub-process.[ch] module.
* When "git checkout", "git merge", etc. manipulates the in-core
index, various pieces of information in the index extensions are
discarded from the original state, as it is usually not the case
that they are kept up-to-date and in-sync with the operation on the
main index. The untracked cache extension is copied across these
operations now, which would speed up "git status" (as long as the
cache is properly invalidated).
* The internal implementation of "git grep" has seen some clean-up.
* Update the C style recommendation for notes for translators, as
recent versions of gettext tools can work with our style of
multi-line comments.
* The implementation of "ref" API around the "packed refs" have been
cleaned up, in preparation for further changes.
* 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.
* Update the character width tables.
* A recent update broke an alias that contained an uppercase letter,
which has been fixed.
* 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.
* 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.
* The "collision detecting" SHA-1 implementation shipped with 2.13.2
was still broken on some platforms. Update to the upstream code
again to take their fix.
* The 'diff-highlight' program (in contrib/) has been restructured
for easier reuse by an external project 'diff-so-fancy'.
* "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.
* "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.
* Fix a recent regression to "git rebase -i" and add tests that would
have caught it and others.
* An unaligned 32-bit access in pack-bitmap code ahs 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.
* 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.
* 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.
--------------------------------------------------------
Git v2.13.2 Release Notes
=========================
Fixes since v2.13.1
-------------------
* The "collision detecting" SHA-1 implementation shipped with 2.13.1
was still broken on some platforms. Update to the upstream code
again to take their fix.
* "git checkout --recurse-submodules" did not quite work with a
submodule that itself has submodules.
* Introduce the BUG() macro to improve die("BUG: ...").
* The "run-command" API implementation has been made more robust
against dead-locking in a threaded environment.
* 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.
* "git clean -d" used to clean directories that has ignored files,
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.
* The timestamp of the index file is now taken after the file is
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.
* "git pull --rebase --autostash" didn't auto-stash when the local history
fast-forwards to the upstream.
* "git describe --contains" penalized light-weight tags so much that
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.
* 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.
* A flaky test has been corrected.
* 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
Also contains various documentation updates and code clean-ups.
(pkgsrc-changes)
----------------
drop patch git-base/patches/patch-sha1dc_sha1.c, see the first paragraph
of above RelNote
=========================
Fixes since v2.13
-----------------
* The Web interface to gmane news archive is long gone, even though
the articles are still accessible via NTTP. Replace the links with
ones to public-inbox.org. Because their message identification is
based on the actual message-id, it is likely that it will be easier
to migrate away from it if/when necessary.
* Update tests to pass under GETTEXT_POISON (a mechanism to ensure
that output strings that should not be translated are not
translated by mistake), and tell TravisCI to run them.
* Setting "log.decorate=false" in the configuration file did not take
effect in v2.13, which has been corrected.
* An earlier update to test 7400 needed to be skipped on CYGWIN.
* Git sometimes gives an advice in a rhetorical question that does
not require an answer, which can confuse new users and non native
speakers. Attempt to rephrase them.
* "git read-tree -m" (no tree-ish) gave a nonsense suggestion "use
--empty if you want to clear the index". With "-m", such a request
will still fail anyway, as you'd need to name at least one tree-ish
to be merged.
* The codepath in "git am" that is used when running "git rebase"
leaked memory held for the log message of the commits being rebased.
* "pack-objects" can stream a slice of an existing packfile out when
the pack bitmap can tell that the reachable objects are all needed
in the output, without inspecting individual objects. This
strategy however would not work well when "--local" and other
options are in use, and need to be disabled.
* Clarify documentation for include.path and includeIf.<condition>.path
configuration variables.
* Tag objects, which are not reachable from any ref, that point at
missing objects were mishandled by "git gc" and friends (they
should silently be ignored instead)
* A few http:// links that are redirected to https:// in the
documentation have been updated to https:// links.
* Make sure our tests would pass when the sources are checked out
with "platform native" line ending convention by default on
Windows. Some "text" files out tests use and the test scripts
themselves that are meant to be run with /bin/sh, ought to be
checked out with eol=LF even on Windows.
* Fix memory leaks pointed out by Coverity (and people).
* The receive-pack program now makes sure that the push certificate
records the same set of push options used for pushing.
* "git cherry-pick" and other uses of the sequencer machinery
mishandled a trailer block whose last line is an incomplete line.
This has been fixed so that an additional sign-off etc. are added
after completing the existing incomplete line.
* The shell completion script (in contrib/) learned "git stash" has
a new "push" subcommand.
* Travis CI gained a task to format the documentation with both
AsciiDoc and AsciiDoctor.
* Update the C style recommendation for notes for translators, as
recent versions of gettext tools can work with our style of
multi-line comments.
* "git clone --config var=val" is a way to populate the
per-repository configuration file of the new repository, but it did
not work well when val is an empty string. This has been fixed.
* A few codepaths in "checkout" and "am" working on an unborn branch
tried to access an uninitialized piece of memory.
* "git for-each-ref --format=..." with %(HEAD) in the format used to
resolve the HEAD symref as many times as it had processed refs,
which was wasteful, and "git branch" shared the same problem.
* "git interpret-trailers", when used as GIT_EDITOR for "git commit
-v", looked for and appended to a trailer block at the very end,
i.e. at the end of the "diff" output. The command has been
corrected to pay attention to the cut-mark line "commit -v" adds to
the buffer---the real trailer block should appear just before it.
* A test allowed both "git push" and "git receive-pack" on the other
end write their traces into the same file. This is OK on platforms
that allows atomically appending to a file opened with O_APPEND,
but on other platforms led to a mangled output, causing
intermittent test failures. This has been fixed by disabling
traces from "receive-pack" in the test.
* "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
that is likely to be a pathname on a local filesystem.
* The "collision detecting" SHA-1 implementation shipped with 2.13
was quite broken on some big-endian platforms and/or platforms that
do not like unaligned fetches. Update to the upstream code which
has already fixed these issues.
* "git am -h" triggered a BUG().
* The interaction of "url.*.insteadOf" and custom URL scheme's
whitelisting is now documented better.
======================
Backward compatibility notes.
* 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
more explicit '.' for that instead. The hope is that existing
users will not mind this change, and eventually the warning can be
turned into a hard error, upgrading the deprecation into removal of
this (mis)feature. That is not scheduled to happen in the upcoming
release (yet).
* The historical argument order "git merge <msg> HEAD <commit>..."
has been deprecated for quite some time, and is now removed.
* The default location "~/.git-credential-cache/socket" for the
socket used to communicate with the credential-cache daemon has
been moved to "~/.cache/git/credential/socket".
* Git now avoids blindly falling back to ".git" when the setup
sequence said we are _not_ in Git repository. A corner case that
happens to work right now may be broken by a call to die("BUG").
We've tried hard to locate such cases and fixed them, but there
might still be cases that need to be addressed--bug reports are
greatly appreciated.
Updates since v2.12
-------------------
UI, Workflows & Features
* "git describe" and "git name-rev" have been taught to take more
than one refname patterns to restrict the set of refs to base their
naming output on, and also learned to take negative patterns to
name refs not to be used for naming via their "--exclude" option.
* Deletion of a branch "foo/bar" could remove .git/refs/heads/foo
once there no longer is any other branch whose name begins with
"foo/", but we didn't do so so far. Now we do.
* When "git merge" detects a path that is renamed in one history
while the other history deleted (or modified) it, it now reports
both paths to help the user understand what is going on in the two
histories being merged.
* The <url> part in "http.<url>.<variable>" configuration variable
can now be spelled with '*' that serves as wildcard.
E.g. "http.https://*.example.com.proxy" can be used to specify the
proxy used for https://a.example.com, https://b.example.com, etc.,
i.e. any host in the example.com domain.
* "git tag" did not leave useful message when adding a new entry to
reflog; this was left unnoticed for a long time because refs/tags/*
doesn't keep reflog by default.
* The "negative" pathspec feature was somewhat more cumbersome to use
than necessary in that its short-hand used "!" which needed to be
escaped from shells, and it required "exclude from what?" specified.
* The command line options for ssh invocation needs to be tweaked for
some implementations of SSH (e.g. PuTTY plink wants "-P <port>"
while OpenSSH wants "-p <port>" to specify port to connect to), and
the variant was guessed when GIT_SSH environment variable is used
to specify it. The logic to guess now applies to the command
specified by the newer GIT_SSH_COMMAND and also core.sshcommand
configuration variable, and comes with an escape hatch for users to
deal with misdetected cases.
More...
=========================
Fixes since v2.12.1
-------------------
* "git status --porcelain" is supposed to give a stable output, but a
few strings were left as translatable by mistake.
* "Dumb http" transport used to misparse a nonsense http-alternates
response, which has been fixed.
* "git diff --quiet" relies on the size field in diff_filespec to be
correctly populated, but diff_populate_filespec() helper function
made an incorrect short-cut when asked only to populate the size
field for paths that need to go through convert_to_git() (e.g. CRLF
conversion).
* There is no need for Python only to give a few messages to the
standard error stream, but we somehow did.
* A leak in a codepath to read from a packed object in (rare) cases
has been plugged.
* "git upload-pack", which is a counter-part of "git fetch", did not
report a request for a ref that was not advertised as invalid.
This is generally not a problem (because "git fetch" will stop
before making such a request), but is the right thing to do.
* A "gc.log" file left by a backgrounded "gc --auto" disables further
automatic gc; it has been taught to run at least once a day (by
default) by ignoring a stale "gc.log" file that is too old.
* "git remote rm X", when a branch has remote X configured as the
value of its branch.*.remote, tried to remove branch.*.remote and
branch.*.merge and failed if either is unset.
* A caller of tempfile API that uses stdio interface to write to
files may ignore errors while writing, which is detected when
tempfile is closed (with a call to ferror()). By that time, the
original errno that may have told us what went wrong is likely to
be long gone and was overwritten by an irrelevant value.
close_tempfile() now resets errno to EIO to make errno at least
predictable.
* "git show-branch" expected there were only very short branch names
in the repository and used a fixed-length buffer to hold them
without checking for overflow.
* The code that parses header fields in the commit object has been
updated for (micro)performance and code hygiene.
* A test that creates a confusing branch whose name is HEAD has been
corrected not to do so.
* "Cc:" on the trailer part does not have to conform to RFC strictly,
unlike in the e-mail header. "git send-email" has been updated to
ignore anything after '>' when picking addresses, to allow non-address
cruft like " # stable 4.4" after the address.
* "git push" had a handful of codepaths that could lead to a deadlock
when unexpected error happened, which has been fixed.
* Code to read submodule.<name>.ignore config did not state the
variable name correctly when giving an error message diagnosing
misconfiguration.
* "git ls-remote" and "git archive --remote" are designed to work
without being in a directory under Git's control. However, recent
updates revealed that we randomly look into a directory called
.git/ without actually doing necessary set-up when working in a
repository. Stop doing so.
* The code to parse the command line "git grep <patterns>... <rev>
[[--] <pathspec>...]" has been cleaned up, and a handful of bugs
have been fixed (e.g. we used to check "--" if it is a rev).
* The code to parse "git -c VAR=VAL cmd" and set configuration
variable for the duration of cmd had two small bugs, which have
been fixed.
This supersedes jc/config-case-cmdline topic that has been discarded.
Also contains various documentation updates and code clean-ups.
======================
Backward compatibility notes.
* Use of an empty string that is used for 'everything matches' is
still warned and Git asks users to use a more explicit '.' for that
instead. The hope is that existing users will not mind this
change, and eventually the warning can be turned into a hard error,
upgrading the deprecation into removal of this (mis)feature. That
is not scheduled to happen in the upcoming release (yet).
* The historical argument order "git merge <msg> HEAD <commit>..."
has been deprecated for quite some time, and will be removed in a
future release.
* An ancient script "git relink" has been removed.
Updates since v2.11
-------------------
UI, Workflows & Features
* Various updates to "git p4".
* "git p4" didn't interact with the internal of .git directory
correctly in the modern "git-worktree"-enabled world.
* "git branch --list" and friends learned "--ignore-case" option to
optionally sort branches and tags case insensitively.
* In addition to %(subject), %(body), "log --pretty=format:..."
learned a new placeholder %(trailers).
* "git rebase" learned "--quit" option, which allows a user to
remove the metadata left by an earlier "git rebase" that was
manually aborted without using "git rebase --abort".
* "git clone --reference $there --recurse-submodules $super" has been
taught to guess repositories usable as references for submodules of
$super that are embedded in $there while making a clone of the
superproject borrow objects from $there; extend the mechanism to
also allow submodules of these submodules to borrow repositories
embedded in these clones of the submodules embedded in the clone of
the superproject.
* Porcelain scripts written in Perl are getting internationalized.
* "git merge --continue" has been added as a synonym to "git commit"
to conclude a merge that has stopped due to conflicts.
* Finer-grained control of what protocols are allowed for transports
during clone/fetch/push have been enabled via a new configuration
mechanism.
* "git shortlog" learned "--committer" option to group commits by
committer, instead of author.
* GitLFS integration with "git p4" has been updated.
* The isatty() emulation for Windows has been updated to eradicate
the previous hack that depended on internals of (older) MSVC
runtime.
* Some platforms no longer understand "latin-1" that is still seen in
the wild in e-mail headers; replace them with "iso-8859-1" that is
more widely known when conversion fails from/to it.
* "git grep" has been taught to optionally recurse into submodules.
* "git rm" used to refuse to remove a submodule when it has its own
git repository embedded in its working tree. It learned to move
the repository away to $GIT_DIR/modules/ of the superproject
instead, and allow the submodule to be deleted (as long as there
will be no loss of local modifications, that is).
* A recent updates to "git p4" was not usable for older p4 but it
could be made to work with minimum changes. Do so.
* "git diff" learned diff.interHunkContext configuration variable
that gives the default value for its --inter-hunk-context option.
* The prereleaseSuffix feature of version comparison that is used in
"git tag -l" did not correctly when two or more prereleases for the
same release were present (e.g. when 2.0, 2.0-beta1, and 2.0-beta2
are there and the code needs to compare 2.0-beta1 and 2.0-beta2).
* "git submodule push" learned "--recurse-submodules=only option to
push submodules out without pushing the top-level superproject.
* "git tag" and "git verify-tag" learned to put GPG verification
status in their "--format=<placeholders>" output format.
* An ancient repository conversion tool left in contrib/ has been
removed.
* "git show-ref HEAD" used with "--verify" because the user is not
interested in seeing refs/remotes/origin/HEAD, and used with
"--head" because the user does not want HEAD to be filtered out,
i.e. "git show-ref --head --verify HEAD", did not work as expected.
* "git submodule add" used to be confused and refused to add a
locally created repository; users can now use "--force" option
to add them.
(merge 619acfc78c sb/submodule-add-force later to maint).
* Some people feel the default set of colors used by "git log --graph"
rather limiting. A mechanism to customize the set of colors has
been introduced.
* "git read-tree" and its underlying unpack_trees() machinery learned
to report problematic paths prefixed with the --super-prefix option.
* When a submodule "A", which has another submodule "B" nested within
it, is "absorbed" into the top-level superproject, the inner
submodule "B" used to be left in a strange state. The logic to
adjust the .git pointers in these submodules has been corrected.
* The user can specify a custom update method that is run when
"submodule update" updates an already checked out submodule. This
was ignored when checking the submodule out for the first time and
we instead always just checked out the commit that is bound to the
path in the superproject's index.
* The command line completion (in contrib/) learned that
"git diff --submodule=" can take "diff" as a recently added option.
* The "core.logAllRefUpdates" that used to be boolean has been
enhanced to take 'always' as well, to record ref updates to refs
other than the ones that are expected to be updated (i.e. branches,
remote-tracking branches and notes).
* Comes with more command line completion (in contrib/) for recently
introduced options.
=========================
Fixes since v2.11
-----------------
* The default Travis-CI configuration specifies newer P4 and GitLFS.
* The character width table has been updated to match Unicode 9.0
* Update the isatty() emulation for Windows by updating the previous
hack that depended on internals of (older) MSVC runtime.
* "git rev-parse --symbolic" failed with a more recent notation like
"HEAD^-1" and "HEAD^!".
* An empty directory in a working tree that can simply be nuked used
to interfere while merging or cherry-picking a change to create a
submodule directory there, which has been fixed..
* The code in "git push" to compute if any commit being pushed in the
superproject binds a commit in a submodule that hasn't been pushed
out was overly inefficient, making it unusable even for a small
project that does not have any submodule but have a reasonable
number of refs.
* "git push --dry-run --recurse-submodule=on-demand" wasn't
"--dry-run" in the submodules.
* The output from "git worktree list" was made in readdir() order,
and was unstable.
* mergetool.<tool>.trustExitCode configuration variable did not apply
to built-in tools, but now it does.
* "git p4" LFS support was broken when LFS stores an empty blob.
* Fix a corner case in merge-recursive regression that crept in
during 2.10 development cycle.
* Update the error messages from the dumb-http client when it fails
to obtain loose objects; we used to give sensible error message
only upon 404 but we now forbid unexpected redirects that needs to
be reported with something sensible.
* When diff.renames configuration is on (and with Git 2.9 and later,
it is enabled by default, which made it worse), "git stash"
misbehaved if a file is removed and another file with a very
similar content is added.
* "git diff --no-index" did not take "--no-abbrev" option.
* "git difftool --dir-diff" had a minor regression when started from
a subdirectory, which has been fixed.
* "git commit --allow-empty --only" (no pathspec) with dirty index
ought to be an acceptable way to create a new commit that does not
change any paths, but it was forbidden, perhaps because nobody
needed it so far.
* A pathname that begins with "//" or "\\" on Windows is special but
path normalization logic was unaware of it.
* "git pull --rebase", when there is no new commits on our side since
we forked from the upstream, should be able to fast-forward without
invoking "git rebase", but it didn't.
* The way to specify hotkeys to "xxdiff" that is used by "git
mergetool" has been modernized to match recent versions of xxdiff.
* Unlike "git am --abort", "git cherry-pick --abort" moved HEAD back
to where cherry-pick started while picking multiple changes, when
the cherry-pick stopped to ask for help from the user, and the user
did "git reset --hard" to a different commit in order to re-attempt
the operation.
* Code cleanup in shallow boundary computation.
* A recent update to receive-pack to make it easier to drop garbage
objects made it clear that GIT_ALTERNATE_OBJECT_DIRECTORIES cannot
have a pathname with a colon in it (no surprise!), and this in turn
made it impossible to push into a repository at such a path. This
has been fixed by introducing a quoting mechanism used when
appending such a path to the colon-separated list.
* The function usage_msg_opt() has been updated to say "fatal:"
before the custom message programs give, when they want to die
with a message about wrong command line options followed by the
standard usage string.
* "git index-pack --stdin" needs an access to an existing repository,
but "git index-pack file.pack" to generate an .idx file that
corresponds to a packfile does not.
* Fix for NDEBUG builds.
* A lazy "git push" without refspec did not internally use a fully
specified refspec to perform 'current', 'simple', or 'upstream'
push, causing unnecessary "ambiguous ref" errors.
* "git p4" misbehaved when swapping a directory and a symbolic link.
* Even though an fix was attempted in Git 2.9.3 days, but running
"git difftool --dir-diff" from a subdirectory never worked. This
has been fixed.
* "git p4" that tracks multile p4 paths imported a single changelist
that touches files in these multiple paths as one commit, followed
by many empty commits. This has been fixed.
* A potential but unlikely buffer overflow in Windows port has been
fixed.
* When the http server gives an incomplete response to a smart-http
rpc call, it could lead to client waiting for a full response that
will never come. Teach the client side to notice this condition
and abort the transfer.
* Some platforms no longer understand "latin-1" that is still seen in
the wild in e-mail headers; replace them with "iso-8859-1" that is
more widely known when conversion fails from/to it.
* Update the procedure to generate "tags" for developer support.
* Update the definition of the MacOSX test environment used by
TravisCI.
* A few git-svn updates.
* Compression setting for producing packfiles were spread across
three codepaths, one of which did not honor any configuration.
Unify these so that all of them honor core.compression and
pack.compression variables the same way.
* "git fast-import" sometimes mishandled while rebalancing notes
tree, which has been fixed.
* Recent update to the default abbreviation length that auto-scales
lacked documentation update, which has been corrected.
* Leakage of lockfiles in the config subsystem has been fixed.
* It is natural that "git gc --auto" may not attempt to pack
everything into a single pack, and there is no point in warning
when the user has configured the system to use the pack bitmap,
leading to disabling further "gc".
* "git archive" did not read the standard configuration files, and
failed to notice a file that is marked as binary via the userdiff
driver configuration.
* "git blame --porcelain" misidentified the "previous" <commit, path>
pair (aka "source") when contents came from two or more files.
* "git rebase -i" with a recent update started showing an incorrect
count when squashing more than 10 commits.
* "git <cmd> @{push}" on a detached HEAD used to segfault; it has
been corrected to error out with a message.
* Tighten a test to avoid mistaking an extended ERE regexp engine as
a PRE regexp engine.
* Typing ^C to pager, which usually does not kill it, killed Git and
took the pager down as a collateral damage in certain process-tree
structure. This has been fixed.
======================
Backward compatibility notes.
* An empty string used as a pathspec element has always meant
'everything matches', but it is too easy to write a script that
finds a path to remove in $path and run 'git rm "$paht"' by
mistake (when the user meant to give "$path"), which ends up
removing everything. This release starts warning about the
use of an empty string that is used for 'everything matches' and
asks users to use a more explicit '.' for that instead.
The hope is that existing users will not mind this change, and
eventually the warning can be turned into a hard error, upgrading
the deprecation into removal of this (mis)feature.
* The historical argument order "git merge <msg> HEAD <commit>..."
has been deprecated for quite some time, and will be removed in the
next release (not this one).
* The default abbreviation length, which has historically been 7, now
scales as the repository grows, using the approximate number of
objects in the repository and a bit of math around the birthday
paradox. The logic suggests to use 12 hexdigits for the Linux
kernel, and 9 to 10 for Git itself.
Updates since v2.10
-------------------
UI, Workflows & Features
* Comes with new version of git-gui, now at its 0.21.0 tag.
* "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 --recurse-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 presence 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,
can perform "outside-world-to-Git" conversions (e.g.
end-of-line conversions and application of the clean-filter), and
it has had this feature on by default from very early days, its reverse
operation "git cat-file", which takes an object from the Git object
store and externalizes it for 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 intelligently selecting
which lines are common and which lines are added/deleted
when the lines before and after the changed section
are the same. A command line option (--indent-heuristic) and a
configuration variable (diff.indentHeuristic) are added to help with the
experiment to find 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 format-patch option "--rfc" is a short-hand for "--subject-prefix=RFC PATCH"
to help the participants of such projects.
* "git add --chmod={+,-}x <pathspec>" only changed the
executable bit for paths that are either new or modified. This has
been corrected to change 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 RFC2822 header folding, "git am" fails to
put the header line back into a single logical line. The
underlying "git mailinfo" was taught to handle this properly.
* "gitweb" can spawn "highlight" to show blob contents with
(programming) language-specific syntax highlighting, but only
when the language is known. "highlight" can however be told
to guess the language itself by giving it "--force" option, which
has been enabled.
* "git gui" l10n to Portuguese.
* When given an abbreviated object name that is not (or more
realistically, "no longer") unique, we gave a fatal error
"ambiguous argument". This error is now accompanied by a hint that
lists the objects beginning with the given prefix. During the
course of development of this new feature, numerous minor bugs were
uncovered and corrected, the most notable one of which is that we
gave "short SHA1 xxxx is ambiguous." twice without good reason.
* "git log rev^..rev" is an often-used revision range specification
to show what was done on a side branch merged at rev. This has
gained a short-hand "rev^-1". In general "rev^-$n" is the same as
"^rev^$n rev", i.e. what has happened on other branches while the
history leading to nth parent was looking the other way.
* In recent versions of cURL, GSSAPI credential delegation is
disabled by default due to CVE-2011-2192; introduce a http.delegation
configuration variable to selectively allow enabling this.
(merge 26a7b23429 ps/http-gssapi-cred-delegation later to maint).
* "git mergetool" learned to honor "-O<orderfile>" to control the
order of paths to present to the end user.
* "git diff/log --ws-error-highlight=<kind>" lacked the corresponding
configuration variable (diff.wsErrorHighlight) to set it by default.
* "git ls-files" learned the "--recurse-submodules" option
to get a listing of tracked files across submodules (i.e. this
only works with the "--cached" option, not for listing untracked or
ignored files). This would be a useful tool to sit on the upstream
side of a pipe that is read with xargs to work on all working tree
files from the top-level superproject.
* A new credential helper that talks via "libsecret" with
implementations of XDG Secret Service API has been added to
contrib/credential/.
* The GPG verification status shown by the "%G?" pretty format specifier
was not rich enough to differentiate a signature made by an expired
key, a signature made by a revoked key, etc. New output letters
have been assigned to express them.
* In addition to purely abbreviated commit object names, "gitweb"
learned to turn "git describe" output (e.g. v2.9.3-599-g2376d31787)
into clickable links in its output.
* "git commit" created an empty commit when invoked with an index
consisting solely of intend-to-add paths (added with "git add -N").
It now requires the "--allow-empty" option to create such a commit.
The same logic prevented "git status" from showing such paths as "new files" in the
"Changes not staged for commit" section.
* The smudge/clean filter API spawns an external process
to filter the contents of each path that has a filter defined. A
new type of "process" filter API has been added to allow the first
request to run the filter for a path to spawn a single process, and
all filtering is served by this single process for multiple
paths, reducing the process creation overhead.
* The user always has to say "stash@{$N}" when naming a single
element in the default location of the stash, i.e. reflogs in
refs/stash. The "git stash" command learned to accept "git stash
apply 4" as a short-hand for "git stash apply stash@{4}".
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).
* Lift 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 advertisements
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 a result they have
become faster.
* The codepath in "git fsck" to detect malformed tree objects has
been updated not to die but keep going after detecting them.
* We call "qsort(array, nelem, sizeof(array[0]), fn)", and most of
the time third parameter is redundant. A new QSORT() macro lets us
omit it.
* "git pack-objects" in a repository with many packfiles used to
spend a lot of time looking for/at objects in them; the accesses to
the packfiles are now optimized by checking the most-recently-used
packfile first.
(merge c9af708b1a jk/pack-objects-optim-mru later to maint).
* Codepaths involved in interacting alternate object stores have
been cleaned up.
* In order for the receiving end of "git push" to inspect the
received history and decide to reject the push, the objects sent
from the sending end need to be made available to the hook and
the mechanism for the connectivity check, and this was done
traditionally by storing the objects in the receiving repository
and letting "git gc" expire them. Instead, store the newly
received objects in a temporary area, and make them available by
reusing the alternate object store mechanism to them only while we
decide if we accept the check, and once we decide, either migrate
them to the repository or purge them immediately.
* The require_clean_work_tree() helper was recreated in C when "git
pull" was rewritten from shell; the helper is now made available to
other callers in preparation for upcoming "rebase -i" work.
* "git upload-pack" had its code cleaned-up and performance improved
by reducing use of timestamp-ordered commit-list, which was
replaced with a priority queue.
* "git diff --no-index" codepath has been updated not to try to peek
into a .git/ directory that happens to be under the current
directory, when we know we are operating outside any repository.
* Update of the sequencer codebase to make it reusable to reimplement
"rebase -i" continues.
* Git generally does not explicitly close file descriptors that were
open in the parent process when spawning a child process, but most
of the time the child does not want to access them. As Windows does
not allow removing or renaming a file that has a file descriptor
open, a slow-to-exit child can even break the parent process by
holding onto them. Use O_CLOEXEC flag to open files in various
codepaths.
* Update "interpret-trailers" machinery and teach it that people in
the real world write all sorts of cruft in the "trailer" that was
originally designed to have the neat-o "Mail-Header: like thing"
and nothing else.
=========================
Fixes since v2.10.1
-------------------
* The code that parses the format parameter of for-each-ref command
has seen a micro-optimization.
* The "graph" API used in "git log --graph" miscounted the number of
output columns consumed so far when drawing a padding line, which
has been fixed; this did not affect any existing code as nobody
tried to write anything after the padding on such a line, though.
* Almost everybody uses DEFAULT_ABBREV to refer to the default
setting for the abbreviation, but "git blame" peeked into
underlying variable bypassing the macro for no good reason.
* Doc update to clarify what "log -3 --reverse" does.
* An author name, that spelled a backslash-quoted double quote in the
human readable part "My \"double quoted\" name", was not unquoted
correctly while applying a patch from a piece of e-mail.
* The original command line syntax for "git merge", which was "git
merge <msg> HEAD <parent>...", has been deprecated for quite some
time, and "git gui" was the last in-tree user of the syntax. This
is finally fixed, so that we can move forward with the deprecation.
* Codepaths that read from an on-disk loose object were too loose in
validating what they are reading is a proper object file and
sometimes read past the data they read from the disk, which has
been corrected. H/t to Gustavo Grieco for reporting.
* "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.
* 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.
* 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.
* When we started cURL to talk to imap server when a new enough
version of cURL library is available, we forgot to explicitly add
imap(s):// before the destination. To some folks, that didn't work
and the library tried to make HTTP(s) requests instead.
* The ./configure script generated from configure.ac was taught how
to detect support of SSL by libcurl better.
* http.emptyauth configuration is a way to allow an empty username to
pass when attempting to authenticate using mechanisms like
Kerberos. We took an unspecified (NULL) username and sent ":"
(i.e. no username, no password) to CURLOPT_USERPWD, but did not do
the same when the username is explicitly set to an empty string.
* "git clone" of a local repository can be done at the filesystem
level, but the codepath did not check errors while copying and
adjusting the file that lists alternate object stores.
* Documentation for "git commit" was updated to clarify that "commit
-p <paths>" adds to the current contents of the index to come up
with what to commit.
* A stray symbolic link in $GIT_DIR/refs/ directory could make name
resolution loop forever, which has been corrected.
* The "submodule.<name>.path" stored in .gitmodules is never copied
to .git/config and such a key in .git/config has no meaning, but
the documentation described it and submodule.<name>.url next to
each other as if both belong to .git/config. This has been fixed.
* Recent git allows submodule.<name>.branch to use a special token
"." instead of the branch name; the documentation has been updated
to describe it.
* In a worktree connected to a repository elsewhere, created via "git
worktree", "git checkout" attempts to protect users from confusion
by refusing to check out a branch that is already checked out in
another worktree. However, this also prevented checking out a
branch, which is designated as the primary branch of a bare
reopsitory, in a worktree that is connected to the bare
repository. The check has been corrected to allow it.
* "git rebase" immediately after "git clone" failed to find the fork
point from the upstream.
* When fetching from a remote that has many tags that are irrelevant
to branches we are following, we used to waste way too many cycles
when checking if the object pointed at by a tag (that we are not
going to fetch!) exists in our repository too carefully.
* The Travis CI configuration we ship ran the tests with --verbose
option but this risks non-TAP output that happens to be "ok" to be
misinterpreted as TAP signalling a test that passed. This resulted
in unnecessary failure. This has been corrected by introducing a
new mode to run our tests in the test harness to send the verbose
output separately to the log file.
* Some AsciiDoc formatter mishandles a displayed illustration with
tabs in it. Adjust a few of them in merge-base documentation to
work around them.
Also contains minor documentation updates and code clean-ups.
adam
leot
maya
wiz
jperkin
gdt
nros
mef
soda
martin
ryoon