282 lines
12 KiB
Plaintext
282 lines
12 KiB
Plaintext
Git 2.6 Release Notes
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=====================
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Updates since v2.5
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------------------
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UI, Workflows & Features
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* An asterisk as a substring (as opposed to the entirety) of a path
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component for both side of a refspec, e.g.
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"refs/heads/o*:refs/remotes/heads/i*", is now allowed.
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* New userdiff pattern definition for fountain screenwriting markup
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format has been added.
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* "git log" and friends learned a new "--date=format:..." option to
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format timestamps using system's strftime(3).
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* "git fast-import" learned to respond to the get-mark command via
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its cat-blob-fd interface.
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* "git rebase -i" learned "drop commit-object-name subject" command
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as another way to skip replaying of a commit.
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* A new configuration variable can enable "--follow" automatically
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when "git log" is run with one pathspec argument.
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* "git status" learned to show a more detailed information regarding
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the "rebase -i" session in progress.
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* "git cat-file" learned "--batch-all-objects" option to enumerate all
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available objects in the repository more quickly than "rev-list
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--all --objects" (the output includes unreachable objects, though).
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* "git fsck" learned to ignore errors on a set of known-to-be-bad
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objects, and also allows the warning levels of various kinds of
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non-critical breakages to be tweaked.
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* "git rebase -i"'s list of todo is made configurable.
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* "git send-email" now performs alias-expansion on names that are
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given via --cccmd, etc.
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* An environment variable GIT_REPLACE_REF_BASE tells Git to look into
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refs hierarchy other than refs/replace/ for the object replacement
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data.
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* Allow untracked cache (experimental) to be used when sparse
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checkout (experimental) is also in use.
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* "git pull --rebase" has been taught to pay attention to
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rebase.autostash configuration.
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* The command-line completion script (in contrib/) has been updated.
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* A negative !ref entry in multi-value transfer.hideRefs
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configuration can be used to say "don't hide this one".
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* After "git am" without "-3" stops, running "git am -" pays attention
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to "-3" only for the patch that caused the original invocation
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to stop.
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* When linked worktree is used, simultaneous "notes merge" instances
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for the same ref in refs/notes/* are prevented from stomping on
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each other.
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* "git send-email" learned a new option --smtp-auth to limit the SMTP
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AUTH mechanisms to be used to a subset of what the system library
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supports.
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* A new configuration variable http.sslVersion can be used to specify
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what specific version of SSL/TLS to use to make a connection.
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Performance, Internal Implementation, Development Support etc.
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* In preparation for allowing different "backends" to store the refs
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in a way different from the traditional "one ref per file in
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$GIT_DIR or in a $GIT_DIR/packed-refs file" filesystem storage,
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direct filesystem access to ref-like things like CHERRY_PICK_HEAD
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from scripts and programs has been reduced.
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* Computation of untracked status indicator by bash prompt
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script (in contrib/) has been optimized.
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* Memory use reduction when commit-slab facility is used to annotate
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sparsely (which is not recommended in the first place).
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* Clean up refs API and make "git clone" less intimate with the
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implementation detail.
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* "git pull" was reimplemented in C.
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* The packet tracing machinery allows to capture an incoming pack
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data to a file for debugging.
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* Move machinery to parse human-readable scaled numbers like 1k, 4M,
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and 2G as an option parameter's value from pack-objects to
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parse-options API, to make it available to other codepaths.
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* "git verify-tag" and "git verify-commit" have been taught to share
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more code, and then learned to optionally show the verification
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message from the underlying GPG implementation.
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* Various enhancements around "git am" reading patches generated by
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foreign SCM have been made.
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* Ref listing by "git branch -l" and "git tag -l" commands has
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started to be rebuilt, based on the for-each-ref machinery.
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* The code to perform multi-tree merges has been taught to repopulate
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the cache-tree upon a successful merge into the index, so that
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subsequent "diff-index --cached" (hence "status") and "write-tree"
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(hence "commit") will go faster.
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The same logic in "git checkout" may now be removed, but that is a
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separate issue.
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* Tests that assume how reflogs are represented on the filesystem too
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much have been corrected.
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* "git am" has been rewritten in "C".
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* git_path() and mkpath() are handy helper functions but it is easy
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to misuse, as the callers need to be careful to keep the number of
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active results below 4. Their uses have been reduced.
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* The "lockfile" API has been rebuilt on top of a new "tempfile" API.
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* To prepare for allowing a different "ref" backend to be plugged in
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to the system, update_ref()/delete_ref() have been taught about
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ref-like things like MERGE_HEAD that are per-worktree (they will
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always be written to the filesystem inside $GIT_DIR).
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Also contains various documentation updates and code clean-ups.
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Fixes since v2.5
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----------------
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Unless otherwise noted, all the fixes since v2.5 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 subtree" (in contrib/) depended on "git log" output to be
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stable, which was a no-no. Apply a workaround to force a
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particular date format.
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(merge e7aac44 da/subtree-date-confusion later to maint).
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* An attempt to delete a ref by pushing into a repository whose HEAD
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symbolic reference points at an unborn branch that cannot be
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created due to ref D/F conflict (e.g. refs/heads/a/b exists, HEAD
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points at refs/heads/a) failed.
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(merge b112b14 jx/do-not-crash-receive-pack-wo-head later to maint).
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* The low-level "git send-pack" did not honor 'user.signingkey'
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configuration variable when sending a signed-push.
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(merge d830d39 db/send-pack-user-signingkey later to maint).
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* "sparse checkout" misbehaved for a path that is excluded from the
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checkout when switching between branches that differ at the path.
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(merge 7d78241 as/sparse-checkout-removal later to maint).
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* An experimental "untracked cache" feature used uname(2) in a
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slightly unportable way.
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(merge 100e433 cb/uname-in-untracked later to maint).
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* A "rebase" replays changes of the local branch on top of something
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else, as such they are placed in stage #3 and referred to as
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"theirs", while the changes in the new base, typically a foreign
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work, are placed in stage #2 and referred to as "ours". Clarify
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the "checkout --ours/--theirs".
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(merge f303016 se/doc-checkout-ours-theirs later to maint).
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* The "rev-parse --parseopt" mode parsed the option specification
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and the argument hint in a strange way to allow '=' and other
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special characters in the option name while forbidding them from
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the argument hint. This made it impossible to define an option
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like "--pair <key>=<value>" with "pair=key=value" specification,
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which instead would have defined a "--pair=key <value>" option.
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(merge 2d893df ib/scripted-parse-opt-better-hint-string later to maint).
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* Often a fast-import stream builds a new commit on top of the
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previous commit it built, and it often unconditionally emits a
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"from" command to specify the first parent, which can be omitted in
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such a case. This caused fast-import to forget the tree of the
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previous commit and then re-read it from scratch, which was
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inefficient. Optimize for this common case.
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(merge 0df3245 mh/fast-import-optimize-current-from later to maint).
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* Running an aliased command from a subdirectory when the .git thing
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in the working tree is a gitfile pointing elsewhere did not work.
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(merge d95138e nd/export-worktree later to maint).
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* "Is this subdirectory a separate repository that should not be
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touched?" check "git clean" was inefficient. This was replaced
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with a more optimized check.
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(merge 38ae878 ee/clean-remove-dirs later to maint).
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* The "new-worktree-mode" hack in "checkout" that was added in
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nd/multiple-work-trees topic has been removed by updating the
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implementation of new "worktree add".
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(merge 65f9b75 es/worktree-add-cleanup later to maint).
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* Remove remaining cruft from "git checkout --to", which
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transitioned to "git worktree add".
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(merge 114ff88 es/worktree-add later to maint).
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* An off-by-one error made "git remote" to mishandle a remote with a
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single letter nickname.
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(merge bc598c3 mh/get-remote-group-fix later to maint).
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* "git clone $URL", when cloning from a site whose sole purpose is to
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host a single repository (hence, no path after <scheme>://<site>/),
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tried to use the site name as the new repository name, but did not
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remove username or password when <site> part was of the form
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<user>@<pass>:<host>. The code is taught to redact these.
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(merge adef956 ps/guess-repo-name-at-root later to maint).
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* Running tests with the "-x" option to make them verbose had some
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unpleasant interactions with other features of the test suite.
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(merge 9b5fe78 jk/test-with-x later to maint).
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* t1509 test that requires a dedicated VM environment had some
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bitrot, which has been corrected.
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(merge faacc5a ps/t1509-chroot-test-fixup later to maint).
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* "git pull" in recent releases of Git has a regression in the code
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that allows custom path to the --upload-pack=<program>. This has
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been corrected.
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Note that this is irrelevant for 'master' with "git pull" rewritten
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in C.
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(merge 22d6857 mm/pull-upload-pack later to maint).
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* When trying to see that an object does not exist, a state errno
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leaked from our "first try to open a packfile with O_NOATIME and
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then if it fails retry without it" logic on a system that refuses
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O_NOATIME. This confused us and caused us to die, saying that the
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packfile is unreadable, when we should have just reported that the
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object does not exist in that packfile to the caller.
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(merge dff6f28 cb/open-noatime-clear-errno later to maint).
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* The codepath to produce error messages had a hard-coded limit to
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the size of the message, primarily to avoid memory allocation while
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calling die().
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(merge f4c3edc jk/long-error-messages later to maint).
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* strbuf_read() used to have one extra iteration (and an unnecessary
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strbuf_grow() of 8kB), which was eliminated.
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(merge 3ebbd00 jh/strbuf-read-use-read-in-full later to maint).
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* We rewrote one of the build scripts in Perl but this reimplements
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in Bourne shell.
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(merge 82aec45 sg/help-group later to maint).
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* The experimental untracked-cache feature were buggy when paths with
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a few levels of subdirectories are involved.
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(merge 73f9145 dt/untracked-subdir later to maint).
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* "interpret-trailers" helper mistook a single-liner log message that
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has a colon as the end of existing trailer.
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(merge 6262fe9 cc/trailers-corner-case-fix later to maint).
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* Code cleanups and documentation updates.
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(merge 1c601af es/doc-clean-outdated-tools later to maint).
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(merge 3581304 kn/tag-doc-fix later to maint).
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(merge 3a59e59 kb/i18n-doc later to maint).
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(merge 45abdee sb/remove-unused-var-from-builtin-add later to maint).
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(merge 14691e3 sb/parse-options-codeformat later to maint).
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(merge 4a6ada3 ad/bisect-cleanup later to maint).
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(merge da4c5ad ta/docfix-index-format-tech later to maint).
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(merge ae25fd3 sb/check-return-from-read-ref later to maint).
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(merge b3325df nd/dwim-wildcards-as-pathspecs later to maint).
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(merge 7aa9b9b sg/wt-status-header-inclusion later to maint).
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(merge f04c690 as/docfix-reflog-expire-unreachable later to maint).
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(merge 1269847 sg/t3020-typofix later to maint).
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(merge 8b54c23 jc/calloc-pathspec later to maint).
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(merge a6926b8 po/po-readme later to maint).
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(merge 54d160e ss/fix-config-fd-leak later to maint).
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