mirror of
https://github.com/git/git
synced 2024-08-26 19:19:18 +00:00
Fall back to three-way merge when applying a patch.
After git-apply fails, attempt to find a base tree that the patch cleanly applies to, and do a three-way merge using that base tree into the current index, if .dotest/.3way file exists. This flag can be controlled by giving -m flag to git-applymbox command. When the fall-back merge fails, the working tree can be resolved the same way as you would normally hand resolve a conflicting merge. When making commit, use .dotest/final-commit as the log message template. Or you could just choose to 'git-checkout-index -f -a' to revert the failed merge. Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
parent
bc162e40ea
commit
47f0b6d5d4
|
@ -8,7 +8,7 @@ git-applymbox - Apply a series of patches in a mailbox
|
||||||
|
|
||||||
SYNOPSIS
|
SYNOPSIS
|
||||||
--------
|
--------
|
||||||
'git-applymbox' [-u] [-k] [-q] ( -c .dotest/<num> | <mbox> ) [ <signoff> ]
|
'git-applymbox' [-u] [-k] [-q] [-m] ( -c .dotest/<num> | <mbox> ) [ <signoff> ]
|
||||||
|
|
||||||
DESCRIPTION
|
DESCRIPTION
|
||||||
-----------
|
-----------
|
||||||
|
@ -33,6 +33,14 @@ OPTIONS
|
||||||
munging, and is most useful when used to read back 'git
|
munging, and is most useful when used to read back 'git
|
||||||
format-patch --mbox' output.
|
format-patch --mbox' output.
|
||||||
|
|
||||||
|
-m::
|
||||||
|
Patches are applied with `git-apply` command, and unless
|
||||||
|
it cleanly applies without fuzz, the processing fails.
|
||||||
|
With this flag, if a tree that the patch applies cleanly
|
||||||
|
is found in a repository, the patch is applied to the
|
||||||
|
tree and then a 3-way merge between the resulting tree
|
||||||
|
and the current tree.
|
||||||
|
|
||||||
-u::
|
-u::
|
||||||
By default, the commit log message, author name and
|
By default, the commit log message, author name and
|
||||||
author email are taken from the e-mail without any
|
author email are taken from the e-mail without any
|
||||||
|
|
|
@ -9,8 +9,6 @@
|
||||||
## You give it a mbox-format collection of emails, and it will try to
|
## You give it a mbox-format collection of emails, and it will try to
|
||||||
## apply them to the kernel using "applypatch"
|
## apply them to the kernel using "applypatch"
|
||||||
##
|
##
|
||||||
## applymbox [-u] [-k] [-q] (-c .dotest/msg-number | mail_archive) [Signoff_file]"
|
|
||||||
##
|
|
||||||
## The patch application may fail in the middle. In which case:
|
## The patch application may fail in the middle. In which case:
|
||||||
## (1) look at .dotest/patch and fix it up to apply
|
## (1) look at .dotest/patch and fix it up to apply
|
||||||
## (2) re-run applymbox with -c .dotest/msg-number for the current one.
|
## (2) re-run applymbox with -c .dotest/msg-number for the current one.
|
||||||
|
@ -21,7 +19,7 @@
|
||||||
. git-sh-setup || die "Not a git archive"
|
. git-sh-setup || die "Not a git archive"
|
||||||
|
|
||||||
usage () {
|
usage () {
|
||||||
echo >&2 "applymbox [-u] [-k] [-q] (-c .dotest/<num> | mbox) [signoff]"
|
echo >&2 "applymbox [-u] [-k] [-q] [-m] (-c .dotest/<num> | mbox) [signoff]"
|
||||||
exit 1
|
exit 1
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -33,6 +31,7 @@ do
|
||||||
-k) keep_subject=-k ;;
|
-k) keep_subject=-k ;;
|
||||||
-q) query_apply=t ;;
|
-q) query_apply=t ;;
|
||||||
-c) continue="$2"; resume=f; shift ;;
|
-c) continue="$2"; resume=f; shift ;;
|
||||||
|
-m) fallback_3way=t ;;
|
||||||
-*) usage ;;
|
-*) usage ;;
|
||||||
*) break ;;
|
*) break ;;
|
||||||
esac
|
esac
|
||||||
|
@ -56,6 +55,9 @@ fi
|
||||||
case "$query_apply" in
|
case "$query_apply" in
|
||||||
t) touch .dotest/.query_apply
|
t) touch .dotest/.query_apply
|
||||||
esac
|
esac
|
||||||
|
case "$fall_back_3way" in
|
||||||
|
t) : >.dotest/.3way
|
||||||
|
esac
|
||||||
case "$keep_subject" in
|
case "$keep_subject" in
|
||||||
-k) : >.dotest/.keep_subject
|
-k) : >.dotest/.keep_subject
|
||||||
esac
|
esac
|
||||||
|
|
|
@ -22,6 +22,8 @@ query_apply=.dotest/.query_apply
|
||||||
## if this file exists.
|
## if this file exists.
|
||||||
keep_subject=.dotest/.keep_subject
|
keep_subject=.dotest/.keep_subject
|
||||||
|
|
||||||
|
## We do not attempt the 3-way merge fallback unless this file exists.
|
||||||
|
fall_back_3way=.dotest/.3way
|
||||||
|
|
||||||
MSGFILE=$1
|
MSGFILE=$1
|
||||||
PATCHFILE=$2
|
PATCHFILE=$2
|
||||||
|
@ -102,10 +104,79 @@ echo Applying "'$SUBJECT'"
|
||||||
echo
|
echo
|
||||||
|
|
||||||
git-apply --index "$PATCHFILE" || {
|
git-apply --index "$PATCHFILE" || {
|
||||||
|
|
||||||
|
# git-apply exits with status 1 when the patch does not apply,
|
||||||
|
# but it die()s with other failures, most notably upon corrupt
|
||||||
|
# patch. In the latter case, there is no point to try applying
|
||||||
|
# it to another tree and do 3-way merge.
|
||||||
|
test $? = 1 || exit 1
|
||||||
|
|
||||||
|
test -f "$fall_back_3way" || exit 1
|
||||||
|
|
||||||
# Here if we know which revision the patch applies to,
|
# Here if we know which revision the patch applies to,
|
||||||
# we create a temporary working tree and index, apply the
|
# we create a temporary working tree and index, apply the
|
||||||
# patch, and attempt 3-way merge with the resulting tree.
|
# patch, and attempt 3-way merge with the resulting tree.
|
||||||
exit 1
|
|
||||||
|
O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
|
||||||
|
rm -fr .patch-merge-*
|
||||||
|
|
||||||
|
(
|
||||||
|
N=10
|
||||||
|
|
||||||
|
# if the patch records the base tree...
|
||||||
|
sed -ne '
|
||||||
|
/^diff /q
|
||||||
|
/^applies-to: \([0-9a-f]*\)$/{
|
||||||
|
s//\1/p
|
||||||
|
q
|
||||||
|
}
|
||||||
|
' "$PATCHFILE"
|
||||||
|
|
||||||
|
# or hoping the patch is against our recent commits...
|
||||||
|
git-rev-list --max-count=$N HEAD
|
||||||
|
|
||||||
|
# or hoping the patch is against known tags...
|
||||||
|
git-ls-remote --tags .
|
||||||
|
) |
|
||||||
|
while read base junk
|
||||||
|
do
|
||||||
|
# Try it if we have it as a tree.
|
||||||
|
git-cat-file tree "$base" >/dev/null 2>&1 || continue
|
||||||
|
|
||||||
|
rm -fr .patch-merge-tmp-* &&
|
||||||
|
mkdir .patch-merge-tmp-dir || break
|
||||||
|
(
|
||||||
|
cd .patch-merge-tmp-dir &&
|
||||||
|
GIT_INDEX_FILE=../.patch-merge-tmp-index &&
|
||||||
|
GIT_OBJECT_DIRECTORY="$O_OBJECT" &&
|
||||||
|
export GIT_INDEX_FILE GIT_OBJECT_DIRECTORY &&
|
||||||
|
git-read-tree "$base" &&
|
||||||
|
git-apply --index &&
|
||||||
|
mv ../.patch-merge-tmp-index ../.patch-merge-index &&
|
||||||
|
echo "$base" >../.patch-merge-base
|
||||||
|
) <"$PATCHFILE" 2>/dev/null && break
|
||||||
|
done
|
||||||
|
|
||||||
|
test -f .patch-merge-index &&
|
||||||
|
his_tree=$(GIT_INDEX_FILE=.patch-merge-index git-write-tree) &&
|
||||||
|
orig_tree=$(cat .patch-merge-base) &&
|
||||||
|
rm -fr .patch-merge-* || exit 1
|
||||||
|
|
||||||
|
echo Falling back to patching base and 3-way merge using $orig_tree...
|
||||||
|
|
||||||
|
# This is not so wrong. Depending on which base we picked,
|
||||||
|
# orig_tree may be wildly different from ours, but his_tree
|
||||||
|
# has the same set of wildly different changes in parts the
|
||||||
|
# patch did not touch, so resolve ends up cancelling them,
|
||||||
|
# saying that we reverted all those changes.
|
||||||
|
|
||||||
|
if git-merge-resolve $orig_tree -- HEAD $his_tree
|
||||||
|
then
|
||||||
|
echo Done.
|
||||||
|
else
|
||||||
|
echo Failed to merge in the changes.
|
||||||
|
exit 1
|
||||||
|
fi
|
||||||
}
|
}
|
||||||
|
|
||||||
if test -x "$GIT_DIR"/hooks/pre-applypatch
|
if test -x "$GIT_DIR"/hooks/pre-applypatch
|
||||||
|
|
Loading…
Reference in a new issue