Git 2.6.0 RC0 发布

UI，工作流和新特性

* An asterisk as a substring (as opposed to the entirety) of a path

component for both side of a refspec, e.g.

"refs/heads/o*:refs/remotes/heads/i*", is now allowed.

* New userdiff pattern definition for fountain screenwriting markup

format has been added.

* "git log" and friends learned a new "--date=format:..." option to

format timestamps using system's strftime(3).

* "git fast-import" learned to respond to the get-mark command via

its cat-blob-fd interface.

* "git rebase -i" learned "drop commit-object-name subject" command

as another way to skip replaying of a commit.

* A new configuration variable can enable "--follow" automatically

when "git log" is run with one pathspec argument.

* "git status" learned to show a more detailed information regarding

the "rebase -i" session in progress.

* "git cat-file" learned "--batch-all-objects" option to enumerate all

available objects in the repository more quickly than "rev-list

--all --objects" (the output includes unreachable objects, though).

* "git fsck" learned to ignore errors on a set of known-to-be-bad

objects, and also allows the warning levels of various kinds of

non-critical breakages to be tweaked.

* "git rebase -i"'s list of todo is made configurable.

* "git send-email" now performs alias-expansion on names that are

given via --cccmd, etc.

* An environment variable GIT_REPLACE_REF_BASE tells Git to look into

refs hierarchy other than refs/replace/ for the object replacement

data.

* Allow untracked cache (experimental) to be used when sparse

checkout (experimental) is also in use.

* "git pull --rebase" has been taught to pay attention to

rebase.autostash configuration.

* The command-line completion script (in contrib/) has been updated.

* A negative !ref entry in multi-value transfer.hideRefs

configuration can be used to say "don't hide this one".

* After "git am" without "-3" stops, running "git am -" pays attention

to "-3" only for the patch that caused the original invocation

to stop.

* When linked worktree is used, simultaneous "notes merge" instances

for the same ref in refs/notes/* are prevented from stomping on

each other.

* "git send-email" learned a new option --smtp-auth to limit the SMTP

AUTH mechanisms to be used to a subset of what the system library

supports.

* A new configuration variable http.sslVersion can be used to specify

what specific version of SSL/TLS to use to make a connection.

* "git notes merge" can be told with "--strategy=<how>" option how to

automatically handle conflicts; this can now be configured by

setting notes.mergeStrategy configuration variable.

* "git log --cc" did not show any patch, even though most of the time

the user meant "git log --cc -p -m" to see patch output for commits

with a single parent, and combined diff for merge commits.  The

command is taught to DWIM "--cc" (without "--raw" and other forms

of output specification) to "--cc -p -m".

* "git config --list" output was hard to parse when values consist of

multiple lines.  "--name-only" option is added to help this.

性能，内部实现和开发支持：

* In preparation for allowing different "backends" to store the refs

in a way different from the traditional "one ref per file in

$GIT_DIR or in a $GIT_DIR/packed-refs file" filesystem storage,

direct filesystem access to ref-like things like CHERRY_PICK_HEAD

from scripts and programs has been reduced.

* Computation of untracked status indicator by bash prompt

script (in contrib/) has been optimized.

* Memory use reduction when commit-slab facility is used to annotate

sparsely (which is not recommended in the first place).

* Clean up refs API and make "git clone" less intimate with the

implementation detail.

* "git pull" was reimplemented in C.

* The packet tracing machinery allows to capture an incoming pack

data to a file for debugging.

* Move machinery to parse human-readable scaled numbers like 1k, 4M,

and 2G as an option parameter's value from pack-objects to

parse-options API, to make it available to other codepaths.

* "git verify-tag" and "git verify-commit" have been taught to share

more code, and then learned to optionally show the verification

message from the underlying GPG implementation.

* Various enhancements around "git am" reading patches generated by

foreign SCM have been made.

* Ref listing by "git branch -l" and "git tag -l" commands has

started to be rebuilt, based on the for-each-ref machinery.

* The code to perform multi-tree merges has been taught to repopulate

the cache-tree upon a successful merge into the index, so that

subsequent "diff-index --cached" (hence "status") and "write-tree"

(hence "commit") will go faster.

The same logic in "git checkout" may now be removed, but that is a

separate issue.

* Tests that assume how reflogs are represented on the filesystem too

much have been corrected.

* "git am" has been rewritten in "C".

* git_path() and mkpath() are handy helper functions but it is easy

to misuse, as the callers need to be careful to keep the number of

active results below 4.  Their uses have been reduced.

* The "lockfile" API has been rebuilt on top of a new "tempfile" API.

* To prepare for allowing a different "ref" backend to be plugged in

to the system, update_ref()/delete_ref() have been taught about

ref-like things like MERGE_HEAD that are per-worktree (they will

always be written to the filesystem inside $GIT_DIR).

* The gitmodules API that is accessed from the C code learned to

cache stuff lazily.