mirror of
https://github.com/git/git
synced 2024-11-05 18:59:29 +00:00
da0005b885
This should improve readability. Compare "thislongname" and "thisLongName". The following keys are left in unchanged. We can decide what to do with them later. - am.keepcr - core.autocrlf .safecrlf .trustctime - diff.dirstat .noprefix - gitcvs.usecrlfattr - gui.blamehistoryctx .trustmtime - pull.twohead - receive.autogc - sendemail.signedoffbycc .smtpsslcertpath .suppresscc Helped-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
216 lines
7.3 KiB
Text
216 lines
7.3 KiB
Text
git-rerere(1)
|
|
=============
|
|
|
|
NAME
|
|
----
|
|
git-rerere - Reuse recorded resolution of conflicted merges
|
|
|
|
SYNOPSIS
|
|
--------
|
|
[verse]
|
|
'git rerere' ['clear'|'forget' <pathspec>|'diff'|'remaining'|'status'|'gc']
|
|
|
|
DESCRIPTION
|
|
-----------
|
|
|
|
In a workflow employing relatively long lived topic branches,
|
|
the developer sometimes needs to resolve the same conflicts over
|
|
and over again until the topic branches are done (either merged
|
|
to the "release" branch, or sent out and accepted upstream).
|
|
|
|
This command assists the developer in this process by recording
|
|
conflicted automerge results and corresponding hand resolve results
|
|
on the initial manual merge, and applying previously recorded
|
|
hand resolutions to their corresponding automerge results.
|
|
|
|
[NOTE]
|
|
You need to set the configuration variable rerere.enabled in order to
|
|
enable this command.
|
|
|
|
|
|
COMMANDS
|
|
--------
|
|
|
|
Normally, 'git rerere' is run without arguments or user-intervention.
|
|
However, it has several commands that allow it to interact with
|
|
its working state.
|
|
|
|
'clear'::
|
|
|
|
Reset the metadata used by rerere if a merge resolution is to be
|
|
aborted. Calling 'git am [--skip|--abort]' or 'git rebase [--skip|--abort]'
|
|
will automatically invoke this command.
|
|
|
|
'forget' <pathspec>::
|
|
|
|
Reset the conflict resolutions which rerere has recorded for the current
|
|
conflict in <pathspec>.
|
|
|
|
'diff'::
|
|
|
|
Display diffs for the current state of the resolution. It is
|
|
useful for tracking what has changed while the user is resolving
|
|
conflicts. Additional arguments are passed directly to the system
|
|
'diff' command installed in PATH.
|
|
|
|
'status'::
|
|
|
|
Print paths with conflicts whose merge resolution rerere will record.
|
|
|
|
'remaining'::
|
|
|
|
Print paths with conflicts that have not been autoresolved by rerere.
|
|
This includes paths whose resolutions cannot be tracked by rerere,
|
|
such as conflicting submodules.
|
|
|
|
'gc'::
|
|
|
|
Prune records of conflicted merges that
|
|
occurred a long time ago. By default, unresolved conflicts older
|
|
than 15 days and resolved conflicts older than 60
|
|
days are pruned. These defaults are controlled via the
|
|
`gc.rerereUnresolved` and `gc.rerereResolved` configuration
|
|
variables respectively.
|
|
|
|
|
|
DISCUSSION
|
|
----------
|
|
|
|
When your topic branch modifies an overlapping area that your
|
|
master branch (or upstream) touched since your topic branch
|
|
forked from it, you may want to test it with the latest master,
|
|
even before your topic branch is ready to be pushed upstream:
|
|
|
|
------------
|
|
o---*---o topic
|
|
/
|
|
o---o---o---*---o---o master
|
|
------------
|
|
|
|
For such a test, you need to merge master and topic somehow.
|
|
One way to do it is to pull master into the topic branch:
|
|
|
|
------------
|
|
$ git checkout topic
|
|
$ git merge master
|
|
|
|
o---*---o---+ topic
|
|
/ /
|
|
o---o---o---*---o---o master
|
|
------------
|
|
|
|
The commits marked with `*` touch the same area in the same
|
|
file; you need to resolve the conflicts when creating the commit
|
|
marked with `+`. Then you can test the result to make sure your
|
|
work-in-progress still works with what is in the latest master.
|
|
|
|
After this test merge, there are two ways to continue your work
|
|
on the topic. The easiest is to build on top of the test merge
|
|
commit `+`, and when your work in the topic branch is finally
|
|
ready, pull the topic branch into master, and/or ask the
|
|
upstream to pull from you. By that time, however, the master or
|
|
the upstream might have been advanced since the test merge `+`,
|
|
in which case the final commit graph would look like this:
|
|
|
|
------------
|
|
$ git checkout topic
|
|
$ git merge master
|
|
$ ... work on both topic and master branches
|
|
$ git checkout master
|
|
$ git merge topic
|
|
|
|
o---*---o---+---o---o topic
|
|
/ / \
|
|
o---o---o---*---o---o---o---o---+ master
|
|
------------
|
|
|
|
When your topic branch is long-lived, however, your topic branch
|
|
would end up having many such "Merge from master" commits on it,
|
|
which would unnecessarily clutter the development history.
|
|
Readers of the Linux kernel mailing list may remember that Linus
|
|
complained about such too frequent test merges when a subsystem
|
|
maintainer asked to pull from a branch full of "useless merges".
|
|
|
|
As an alternative, to keep the topic branch clean of test
|
|
merges, you could blow away the test merge, and keep building on
|
|
top of the tip before the test merge:
|
|
|
|
------------
|
|
$ git checkout topic
|
|
$ git merge master
|
|
$ git reset --hard HEAD^ ;# rewind the test merge
|
|
$ ... work on both topic and master branches
|
|
$ git checkout master
|
|
$ git merge topic
|
|
|
|
o---*---o-------o---o topic
|
|
/ \
|
|
o---o---o---*---o---o---o---o---+ master
|
|
------------
|
|
|
|
This would leave only one merge commit when your topic branch is
|
|
finally ready and merged into the master branch. This merge
|
|
would require you to resolve the conflict, introduced by the
|
|
commits marked with `*`. However, this conflict is often the
|
|
same conflict you resolved when you created the test merge you
|
|
blew away. 'git rerere' helps you resolve this final
|
|
conflicted merge using the information from your earlier hand
|
|
resolve.
|
|
|
|
Running the 'git rerere' command immediately after a conflicted
|
|
automerge records the conflicted working tree files, with the
|
|
usual conflict markers `<<<<<<<`, `=======`, and `>>>>>>>` in
|
|
them. Later, after you are done resolving the conflicts,
|
|
running 'git rerere' again will record the resolved state of these
|
|
files. Suppose you did this when you created the test merge of
|
|
master into the topic branch.
|
|
|
|
Next time, after seeing the same conflicted automerge,
|
|
running 'git rerere' will perform a three-way merge between the
|
|
earlier conflicted automerge, the earlier manual resolution, and
|
|
the current conflicted automerge.
|
|
If this three-way merge resolves cleanly, the result is written
|
|
out to your working tree file, so you do not have to manually
|
|
resolve it. Note that 'git rerere' leaves the index file alone,
|
|
so you still need to do the final sanity checks with `git diff`
|
|
(or `git diff -c`) and 'git add' when you are satisfied.
|
|
|
|
As a convenience measure, 'git merge' automatically invokes
|
|
'git rerere' upon exiting with a failed automerge and 'git rerere'
|
|
records the hand resolve when it is a new conflict, or reuses the earlier hand
|
|
resolve when it is not. 'git commit' also invokes 'git rerere'
|
|
when committing a merge result. What this means is that you do
|
|
not have to do anything special yourself (besides enabling
|
|
the rerere.enabled config variable).
|
|
|
|
In our example, when you do the test merge, the manual
|
|
resolution is recorded, and it will be reused when you do the
|
|
actual merge later with the updated master and topic branch, as long
|
|
as the recorded resolution is still applicable.
|
|
|
|
The information 'git rerere' records is also used when running
|
|
'git rebase'. After blowing away the test merge and continuing
|
|
development on the topic branch:
|
|
|
|
------------
|
|
o---*---o-------o---o topic
|
|
/
|
|
o---o---o---*---o---o---o---o master
|
|
|
|
$ git rebase master topic
|
|
|
|
o---*---o-------o---o topic
|
|
/
|
|
o---o---o---*---o---o---o---o master
|
|
------------
|
|
|
|
you could run `git rebase master topic`, to bring yourself
|
|
up-to-date before your topic is ready to be sent upstream.
|
|
This would result in falling back to a three-way merge, and it
|
|
would conflict the same way as the test merge you resolved earlier.
|
|
'git rerere' will be run by 'git rebase' to help you resolve this
|
|
conflict.
|
|
|
|
GIT
|
|
---
|
|
Part of the linkgit:git[1] suite
|