618 lines
28 KiB
Text
618 lines
28 KiB
Text
Git 2.13 Release Notes
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======================
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Backward compatibility notes.
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* Use of an empty string as a pathspec element that is used for
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'everything matches' is still warned and Git asks users to use a
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more explicit '.' for that instead. The hope is that existing
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users will not mind this change, and eventually the warning can be
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turned into a hard error, upgrading the deprecation into removal of
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this (mis)feature. That is not scheduled to happen in the upcoming
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release (yet).
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* The historical argument order "git merge <msg> HEAD <commit>..."
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has been deprecated for quite some time, and is now removed.
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* The default location "~/.git-credential-cache/socket" for the
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socket used to communicate with the credential-cache daemon has
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been moved to "~/.cache/git/credential/socket".
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* Git now avoids blindly falling back to ".git" when the setup
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sequence said we are _not_ in Git repository. A corner case that
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happens to work right now may be broken by a call to die("BUG").
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We've tried hard to locate such cases and fixed them, but there
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might still be cases that need to be addressed--bug reports are
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greatly appreciated.
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Updates since v2.12
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-------------------
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UI, Workflows & Features
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* "git describe" and "git name-rev" have been taught to take more
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than one refname patterns to restrict the set of refs to base their
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naming output on, and also learned to take negative patterns to
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name refs not to be used for naming via their "--exclude" option.
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* Deletion of a branch "foo/bar" could remove .git/refs/heads/foo
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once there no longer is any other branch whose name begins with
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"foo/", but we didn't do so so far. Now we do.
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* When "git merge" detects a path that is renamed in one history
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while the other history deleted (or modified) it, it now reports
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both paths to help the user understand what is going on in the two
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histories being merged.
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* The <url> part in "http.<url>.<variable>" configuration variable
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can now be spelled with '*' that serves as wildcard.
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E.g. "http.https://*.example.com.proxy" can be used to specify the
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proxy used for https://a.example.com, https://b.example.com, etc.,
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i.e. any host in the example.com domain.
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* "git tag" did not leave useful message when adding a new entry to
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reflog; this was left unnoticed for a long time because refs/tags/*
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doesn't keep reflog by default.
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* The "negative" pathspec feature was somewhat more cumbersome to use
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than necessary in that its short-hand used "!" which needed to be
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escaped from shells, and it required "exclude from what?" specified.
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* The command line options for ssh invocation needs to be tweaked for
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some implementations of SSH (e.g. PuTTY plink wants "-P <port>"
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while OpenSSH wants "-p <port>" to specify port to connect to), and
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the variant was guessed when GIT_SSH environment variable is used
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to specify it. The logic to guess now applies to the command
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specified by the newer GIT_SSH_COMMAND and also core.sshcommand
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configuration variable, and comes with an escape hatch for users to
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deal with misdetected cases.
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* The "--git-path", "--git-common-dir", and "--shared-index-path"
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options of "git rev-parse" did not produce usable output. They are
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now updated to show the path to the correct file, relative to where
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the caller is.
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* "git diff -W" has been taught to handle the case where a new
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function is added at the end of the file better.
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* "git update-ref -d" and other operations to delete references did
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not leave any entry in HEAD's reflog when the reference being
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deleted was the current branch. This is not a problem in practice
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because you do not want to delete the branch you are currently on,
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but caused renaming of the current branch to something else not to
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be logged in a useful way.
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* "Cc:" on the trailer part does not have to conform to RFC strictly,
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unlike in the e-mail header. "git send-email" has been updated to
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ignore anything after '>' when picking addresses, to allow non-address
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cruft like " # stable 4.4" after the address.
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* When "git submodule init" decides that the submodule in the working
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tree is its upstream, it now gives a warning as it is not a very
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common setup.
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* "git stash push" takes a pathspec so that the local changes can be
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stashed away only partially.
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* Documentation for "git ls-files" did not refer to core.quotePath.
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* The experimental "split index" feature has gained a few
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configuration variables to make it easier to use.
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* From a working tree of a repository, a new option of "rev-parse"
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lets you ask if the repository is used as a submodule of another
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project, and where the root level of the working tree of that
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project (i.e. your superproject) is.
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* The pathspec mechanism learned to further limit the paths that
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match the pattern to those that have specified attributes attached
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via the gitattributes mechanism.
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* Our source code has used the SHA1_HEADER cpp macro after "#include"
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in the C code to switch among the SHA-1 implementations. Instead,
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list the exact header file names and switch among implementations
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using "#ifdef BLK_SHA1/#include "block-sha1/sha1.h"/.../#endif";
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this helps some IDE tools.
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* The start-up sequence of "git" needs to figure out some configured
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settings before it finds and set itself up in the location of the
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repository and was quite messy due to its "chicken-and-egg" nature.
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The code has been restructured.
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* The command line prompt (in contrib/) learned a new 'tag' style
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that can be specified with GIT_PS1_DESCRIBE_STYLE, to describe a
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detached HEAD with "git describe --tags".
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* The configuration file learned a new "includeIf.<condition>.path"
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that includes the contents of the given path only when the
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condition holds. This allows you to say "include this work-related
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bit only in the repositories under my ~/work/ directory".
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* Recent update to "rebase -i" started showing a message that is not
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a warning with "warning:" prefix by mistake. This has been fixed.
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* Recently we started passing the "--push-options" through the
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external remote helper interface; now the "smart HTTP" remote
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helper understands what to do with the passed information.
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* "git describe --dirty" dies when it cannot be determined if the
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state in the working tree matches that of HEAD (e.g. broken
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repository or broken submodule). The command learned a new option
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"git describe --broken" to give "$name-broken" (where $name is the
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description of HEAD) in such a case.
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* "git checkout" is taught the "--recurse-submodules" option.
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* Recent enhancement to "git stash push" command to support pathspec
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to allow only a subset of working tree changes to be stashed away
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was found to be too chatty and exposed the internal implementation
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detail (e.g. when it uses reset to match the index to HEAD before
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doing other things, output from reset seeped out). These, and
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other chattyness has been fixed.
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* "git merge <message> HEAD <commit>" syntax that has been deprecated
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since October 2007 has been removed.
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* The refs completion for large number of refs has been sped up,
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partly by giving up disambiguating ambiguous refs and partly by
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eliminating most of the shell processing between 'git for-each-ref'
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and 'ls-remote' and Bash's completion facility.
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* On many keyboards, typing "@{" involves holding down SHIFT key and
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one can easily end up with "@{Up..." when typing "@{upstream}". As
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the upstream/push keywords do not appear anywhere else in the syntax,
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we can safely accept them case insensitively without introducing
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ambiguity or confusion to solve this.
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* "git tag/branch/for-each-ref" family of commands long allowed to
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filter the refs by "--contains X" (show only the refs that are
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descendants of X), "--merged X" (show only the refs that are
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ancestors of X), "--no-merged X" (show only the refs that are not
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ancestors of X). One curious omission, "--no-contains X" (show
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only the refs that are not descendants of X) has been added to
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them.
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* The default behaviour of "git log" in an interactive session has
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been changed to enable "--decorate".
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* The output from "git status --short" has been extended to show
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various kinds of dirtiness in submodules differently; instead of to
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"M" for modified, 'm' and '?' can be shown to signal changes only
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to the working tree of the submodule but not the commit that is
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checked out.
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* Allow the http.postbuffer configuration variable to be set to a
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size that can be expressed in size_t, which can be larger than
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ulong on some platforms.
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* "git rebase" learns "--signoff" option.
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* The completion script (in contrib/) learned to complete "git push
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--delete b<TAB>" to complete branch name to be deleted.
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* "git worktree add --lock" allows to lock a worktree immediately
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after it's created. This helps prevent a race between "git worktree
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add; git worktree lock" and "git worktree prune".
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* Completion for "git checkout <branch>" that auto-creates the branch
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out of a remote tracking branch can now be disabled, as this
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completion often gets in the way when completing to checkout an
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existing local branch that happens to share the same prefix with
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bunch of remote tracking branches.
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Performance, Internal Implementation, Development Support etc.
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* The code to list branches in "git branch" has been consolidated
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with the more generic ref-filter API.
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* Resource usage while enumerating refs from alternate object store
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has been optimized to help receiving end of "push" that hosts a
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repository with many "forks".
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* The gitattributes machinery is being taught to work better in a
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multi-threaded environment.
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* "git rebase -i" starts using the recently updated "sequencer" code.
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* Code and design clean-up for the refs API.
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* The preload-index code has been taught not to bother with the index
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entries that are paths that are not checked out by "sparse checkout".
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* Some warning() messages from "git clean" were updated to show the
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errno from failed system calls.
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* The "parse_config_key()" API function has been cleaned up.
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* A test that creates a confusing branch whose name is HEAD has been
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corrected not to do so.
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* The code that parses header fields in the commit object has been
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updated for (micro)performance and code hygiene.
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* An helper function to make it easier to append the result from
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real_path() to a strbuf has been added.
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* Reduce authentication round-trip over HTTP when the server supports
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just a single authentication method. This also improves the
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behaviour when Git is misconfigured to enable http.emptyAuth
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against a server that does not authenticate without a username
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(i.e. not using Kerberos etc., which makes http.emptyAuth
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pointless).
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* Windows port wants to use OpenSSL's implementation of SHA-1
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routines, so let them.
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* The t/perf performance test suite was not prepared to test not so
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old versions of Git, but now it covers versions of Git that are not
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so ancient.
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* Add 32-bit Linux variant to the set of platforms to be tested with
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Travis CI.
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* "git branch --list" takes the "--abbrev" and "--no-abbrev" options
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to control the output of the object name in its "-v"(erbose)
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output, but a recent update started ignoring them; fix it before
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the breakage reaches to any released version.
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* Picking two versions of Git and running tests to make sure the
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older one and the newer one interoperate happily has now become
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possible.
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* "git tag --contains" used to (ab)use the object bits to keep track
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of the state of object reachability without clearing them after
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use; this has been cleaned up and made to use the newer commit-slab
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facility.
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* The "debug" helper used in the test framework learned to run
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a command under "gdb" interactively.
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* The "detect attempt to create collisions" variant of SHA-1
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implementation by Marc Stevens (CWI) and Dan Shumow (Microsoft)
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has been integrated and made the default.
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* The test framework learned to detect unterminated here documents.
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* The name-hash used for detecting paths that are different only in
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cases (which matter on case insensitive filesystems) has been
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optimized to take advantage of multi-threading when it makes sense.
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* An earlier version of sha1dc/sha1.c that was merged to 'master'
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compiled incorrectly on Windows, which has been fixed.
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* "what URL do we want to update this submodule?" and "are we
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interested in this submodule?" are split into two distinct
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concepts, and then the way used to express the latter got extended,
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paving a way to make it easier to manage a project with many
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submodules and make it possible to later extend use of multiple
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worktrees for a project with submodules.
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* Some debugging output from "git describe" were marked for l10n,
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but some weren't. Mark missing ones for l10n.
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* Define a new task in .travis.yml that triggers a test session on
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Windows run elsewhere.
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* Conversion from uchar[20] to struct object_id continues.
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* The "submodule" specific field in the ref_store structure is
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replaced with a more generic "gitdir" that can later be used also
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when dealing with ref_store that represents the set of refs visible
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from the other worktrees.
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* The string-list API used a custom reallocation strategy that was
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very inefficient, instead of using the usual ALLOC_GROW() macro,
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which has been fixed.
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(merge 950a234cbd jh/string-list-micro-optim later to maint).
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* In a 2- and 3-way merge of trees, more than one source trees often
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end up sharing an identical subtree; optimize by not reading the
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same tree multiple times in such a case.
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(merge d12a8cf0af jh/unpack-trees-micro-optim later to maint).
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* The index file has a trailing SHA-1 checksum to detect file
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corruption, and historically we checked it every time the index
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file is used. Omit the validation during normal use, and instead
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verify only in "git fsck".
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* Having a git command on the upstream side of a pipe in a test
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script will hide the exit status from the command, which may cause
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us to fail to notice a breakage; rewrite tests in a script to avoid
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this issue.
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* Travis CI learns to run coccicheck.
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* "git checkout" that handles a lot of paths has been optimized by
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reducing the number of unnecessary checks of paths in the
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has_dir_name() function.
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* The internals of the refs API around the cached refs has been
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streamlined.
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* Output from perf tests have been updated to align their titles.
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Also contains various documentation updates and code clean-ups.
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Fixes since v2.12
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-----------------
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Unless otherwise noted, all the fixes since v2.12 in the maintenance
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track are contained in this release (see the maintenance releases'
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notes for details).
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* "git repack --depth=<n>" for a long time busted the specified depth
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when reusing delta from existing packs. This has been corrected.
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* The code to parse the command line "git grep <patterns>... <rev>
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[[--] <pathspec>...]" has been cleaned up, and a handful of bugs
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have been fixed (e.g. we used to check "--" if it is a rev).
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* "git ls-remote" and "git archive --remote" are designed to work
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without being in a directory under Git's control. However, recent
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updates revealed that we randomly look into a directory called
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.git/ without actually doing necessary set-up when working in a
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repository. Stop doing so.
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* "git show-branch" expected there were only very short branch names
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in the repository and used a fixed-length buffer to hold them
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without checking for overflow.
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* A caller of tempfile API that uses stdio interface to write to
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files may ignore errors while writing, which is detected when
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tempfile is closed (with a call to ferror()). By that time, the
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original errno that may have told us what went wrong is likely to
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be long gone and was overwritten by an irrelevant value.
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close_tempfile() now resets errno to EIO to make errno at least
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predictable.
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* "git remote rm X", when a branch has remote X configured as the
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value of its branch.*.remote, tried to remove branch.*.remote and
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branch.*.merge and failed if either is unset.
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* A "gc.log" file left by a backgrounded "gc --auto" disables further
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automatic gc; it has been taught to run at least once a day (by
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default) by ignoring a stale "gc.log" file that is too old.
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* The code to parse "git -c VAR=VAL cmd" and set configuration
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variable for the duration of cmd had two small bugs, which have
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been fixed.
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* user.email that consists of only cruft chars should consistently
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error out, but didn't.
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* "git upload-pack", which is a counter-part of "git fetch", did not
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report a request for a ref that was not advertised as invalid.
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This is generally not a problem (because "git fetch" will stop
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before making such a request), but is the right thing to do.
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* A leak in a codepath to read from a packed object in (rare) cases
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has been plugged.
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* When a redirected http transport gets an error during the
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redirected request, we ignored the error we got from the server,
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and ended up giving a not-so-useful error message.
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* The patch subcommand of "git add -i" was meant to have paths
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selection prompt just like other subcommand, unlike "git add -p"
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directly jumps to hunk selection. Recently, this was broken and
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"add -i" lost the paths selection dialog, but it now has been
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fixed.
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* Git v2.12 was shipped with an embarrassing breakage where various
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operations that verify paths given from the user stopped dying when
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seeing an issue, and instead later triggering segfault.
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* There is no need for Python only to give a few messages to the
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standard error stream, but we somehow did.
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* The code to parse "git log -L..." command line was buggy when there
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are many ranges specified with -L; overrun of the allocated buffer
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has been fixed.
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* The command-line parsing of "git log -L" copied internal data
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structures using incorrect size on ILP32 systems.
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* "git diff --quiet" relies on the size field in diff_filespec to be
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correctly populated, but diff_populate_filespec() helper function
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made an incorrect short-cut when asked only to populate the size
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field for paths that need to go through convert_to_git() (e.g. CRLF
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conversion).
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* A few tests were run conditionally under (rare) conditions where
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they cannot be run (like running cvs tests under 'root' account).
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* "git branch @" created refs/heads/@ as a branch, and in general the
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code that handled @{-1} and @{upstream} was a bit too loose in
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disambiguating.
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* "git fetch" that requests a commit by object name, when the other
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side does not allow such an request, failed without much
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explanation.
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* "git filter-branch --prune-empty" drops a single-parent commit that
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becomes a no-op, but did not drop a root commit whose tree is empty.
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* Recent versions of Git treats http alternates (used in dumb http
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transport) just like HTTP redirects and requires the client to
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enable following it, due to security concerns. But we forgot to
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give a warning when we decide not to honor the alternates.
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* "git push" had a handful of codepaths that could lead to a deadlock
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when unexpected error happened, which has been fixed.
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* "Dumb http" transport used to misparse a nonsense http-alternates
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response, which has been fixed.
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* "git add -p <pathspec>" unnecessarily expanded the pathspec to a
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list of individual files that matches the pathspec by running "git
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ls-files <pathspec>", before feeding it to "git diff-index" to see
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which paths have changes, because historically the pathspec
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language supported by "diff-index" was weaker. These days they are
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equivalent and there is no reason to internally expand it. This
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helps both performance and avoids command line argument limit on
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some platforms.
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(merge 7288e12cce jk/add-i-use-pathspecs later to maint).
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* "git status --porcelain" is supposed to give a stable output, but a
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few strings were left as translatable by mistake.
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* "git revert -m 0 $merge_commit" complained that reverting a merge
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needs to say relative to which parent the reversion needs to
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happen, as if "-m 0" weren't given. The correct diagnosis is that
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"-m 0" does not refer to the first parent ("-m 1" does). This has
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been fixed.
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* Code to read submodule.<name>.ignore config did not state the
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variable name correctly when giving an error message diagnosing
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misconfiguration.
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|
|
|
* Fix for NO_PTHREADS build.
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|
|
|
* Fix for potential segv introduced in v2.11.0 and later (also
|
|
v2.10.2) to "git log --pickaxe-regex -S".
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|
|
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* A few unterminated here documents in tests were fixed, which in
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|
turn revealed incorrect expectations the tests make. These tests
|
|
have been updated.
|
|
|
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* Fix for NO_PTHREADS option.
|
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(merge 2225e1ea20 bw/grep-recurse-submodules later to maint).
|
|
|
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* 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").
|
|
(merge b1ef400eec jk/no-looking-at-dotgit-outside-repo-final later to maint).
|
|
|
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* A few commands that recently learned the "--recurse-submodule"
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|
option misbehaved when started from a subdirectory of the
|
|
superproject.
|
|
(merge b2dfeb7c00 bw/recurse-submodules-relative-fix later to maint).
|
|
|
|
* FreeBSD implementation of getcwd(3) behaved differently when an
|
|
intermediate directory is unreadable/unsearchable depending on the
|
|
length of the buffer provided, which our strbuf_getcwd() was not
|
|
aware of. strbuf_getcwd() has been taught to cope with it better.
|
|
(merge a54e938e5b rs/freebsd-getcwd-workaround later to maint).
|
|
|
|
* A recent update to "rebase -i" stopped running hooks for the "git
|
|
commit" command during "reword" action, which has been fixed.
|
|
|
|
* Removing an entry from a notes tree and then looking another note
|
|
entry from the resulting tree using the internal notes API
|
|
functions did not work as expected. No in-tree users of the API
|
|
has such access pattern, but it still is worth fixing.
|
|
|
|
* "git receive-pack" could have been forced to die by attempting
|
|
allocate an unreasonably large amount of memory with a crafted push
|
|
certificate; this has been fixed.
|
|
(merge f2214dede9 bc/push-cert-receive-fix later to maint).
|
|
|
|
* Update error handling for codepath that deals with corrupt loose
|
|
objects.
|
|
(merge 51054177b3 jk/loose-object-info-report-error later to maint).
|
|
|
|
* "git diff --submodule=diff" learned to work better in a project
|
|
with a submodule that in turn has its own submodules.
|
|
(merge 17b254cda6 sb/show-diff-for-submodule-in-diff-fix later to maint).
|
|
|
|
* Update the build dependency so that an update to /usr/bin/perl
|
|
etc. result in recomputation of perl.mak file.
|
|
(merge c59c4939c2 ab/regen-perl-mak-with-different-perl later to maint).
|
|
|
|
* "git push --recurse-submodules --push-option=<string>" learned to
|
|
propagate the push option recursively down to pushes in submodules.
|
|
|
|
* If a patch e-mail had its first paragraph after an in-body header
|
|
indented (even after a blank line after the in-body header line),
|
|
the indented line was mistook as a continuation of the in-body
|
|
header. This has been fixed.
|
|
(merge fd1062e52e lt/mailinfo-in-body-header-continuation later to maint).
|
|
|
|
* Clean up fallouts from recent tightening of the set-up sequence,
|
|
where Git barfs when repository information is accessed without
|
|
first ensuring that it was started in a repository.
|
|
(merge bccb22cbb1 jk/no-looking-at-dotgit-outside-repo later to maint).
|
|
|
|
* "git p4" used "name-rev HEAD" when it wants to learn what branch is
|
|
checked out; it should use "symbolic-ref HEAD".
|
|
(merge eff451101d ld/p4-current-branch-fix later to maint).
|
|
|
|
* "http.proxy" set to an empty string is used to disable the usage of
|
|
proxy. We broke this early last year.
|
|
(merge ae51d91105 sr/http-proxy-configuration-fix later to maint).
|
|
|
|
* $GIT_DIR may in some cases be normalized with all symlinks resolved
|
|
while "gitdir" path expansion in the pattern does not receive the
|
|
same treatment, leading to incorrect mismatch. This has been fixed.
|
|
|
|
* "git submodule" script does not work well with strange pathnames.
|
|
Protect it from a path with slashes in them, at least.
|
|
|
|
* "git fetch-pack" was not prepared to accept ERR packet that the
|
|
upload-pack can send with a human-readable error message. It
|
|
showed the packet contents with ERR prefix, so there was no data
|
|
loss, but it was redundant to say "ERR" in an error message.
|
|
(merge 8e2c7bef03 jt/fetch-pack-error-reporting later to maint).
|
|
|
|
* "ls-files --recurse-submodules" did not quite work well in a
|
|
project with nested submodules.
|
|
|
|
* gethostname(2) may not NUL terminate the buffer if hostname does
|
|
not fit; unfortunately there is no easy way to see if our buffer
|
|
was too small, but at least this will make sure we will not end up
|
|
using garbage past the end of the buffer.
|
|
(merge 5781a9a270 dt/xgethostname-nul-termination later to maint).
|
|
|
|
* A recent update broke "git add -p ../foo" from a subdirectory.
|
|
|
|
* While handy, "git_path()" is a dangerous function to use as a
|
|
callsite that uses it safely one day can be broken by changes
|
|
to other code that calls it. Reduction of its use continues.
|
|
(merge 16d2676c9e jk/war-on-git-path later to maint).
|
|
|
|
* The split-index code configuration code used an unsafe git_path()
|
|
function without copying its result out.
|
|
|
|
* Many stale HTTP(s) links have been updated in our documentation.
|
|
(merge 613416f0be jk/update-links-in-docs later to maint).
|
|
|
|
* "git-shell" rejects a request to serve a repository whose name
|
|
begins with a dash, which makes it no longer possible to get it
|
|
confused into spawning service programs like "git-upload-pack" with
|
|
an option like "--help", which in turn would spawn an interactive
|
|
pager, instead of working with the repository user asked to access
|
|
(i.e. the one whose name is "--help").
|
|
|
|
* Other minor doc, test and build updates and code cleanups.
|
|
(merge df2a6e38b7 jk/pager-in-use later to maint).
|
|
(merge 75ec4a6cb0 ab/branch-list-doc later to maint).
|
|
(merge 3e5b36c637 sg/skip-prefix-in-prettify-refname later to maint).
|
|
(merge 2c5e2865cc jk/fast-import-cleanup later to maint).
|
|
(merge 4473060bc2 ab/test-readme-updates later to maint).
|
|
(merge 48a96972fd ab/doc-submitting later to maint).
|
|
(merge f5c2bc2b96 jk/make-coccicheck-detect-errors later to maint).
|
|
(merge c105f563d1 cc/untracked later to maint).
|
|
(merge 8668976b53 jc/unused-symbols later to maint).
|
|
(merge fba275dc93 jc/bs-t-is-not-a-tab-for-sed later to maint).
|
|
(merge be6ed145de mm/ls-files-s-doc later to maint).
|
|
(merge 60b091c679 qp/bisect-docfix later to maint).
|
|
(merge 47242cd103 ah/diff-files-ours-theirs-doc later to maint).
|
|
(merge 35ad44cbd8 sb/submodule-rm-absorb later to maint).
|
|
(merge 0301f1fd92 va/i18n-perl-scripts later to maint).
|
|
(merge 733e064d98 vn/revision-shorthand-for-side-branch-log later to maint).
|
|
(merge 85999743e7 tb/doc-eol-normalization later to maint).
|
|
(merge 0747fb49fd jk/loose-object-fsck later to maint).
|
|
(merge d8f4481c4f jk/quarantine-received-objects later to maint).
|
|
(merge 7ba1ceef95 xy/format-patch-base later to maint).
|
|
(merge fa1912c89a rs/misc-cppcheck-fixes later to maint).
|
|
(merge f17d642d3b ab/push-cas-doc-n-test later to maint).
|
|
(merge 61e282425a ss/gitmodules-ignore-doc later to maint).
|
|
(merge 8d3047cd5b ss/submodule-shallow-doc later to maint).
|
|
(merge 1f9e18b772 jk/prio-queue-avoid-swap-with-self later to maint).
|
|
(merge 627fde1025 jk/submodule-init-segv-fix later to maint).
|
|
(merge d395745d81 rg/doc-pull-typofix later to maint).
|
|
(merge 01e60a9a22 rg/doc-submittingpatches-wordfix later to maint).
|
|
(merge 501d3cd7b8 sr/hooks-cwd-doc later to maint).
|