mirror of
https://github.com/git/git
synced 2024-08-28 12:09:19 +00:00
![Junio C Hamano](/assets/img/avatar_default.png)
We said "fix up by hand" after failed automerge, which was a big "Huh? Now what?". Be a bit more explicit without being too verbose. Suggested by Carl Worth. Signed-off-by: Junio C Hamano <junkio@cox.net>
340 lines
7.2 KiB
Bash
Executable file
340 lines
7.2 KiB
Bash
Executable file
#!/bin/sh
|
|
#
|
|
# Copyright (c) 2005 Junio C Hamano
|
|
#
|
|
|
|
|
|
USAGE='[-n] [--no-commit] [-s <strategy>]... <merge-message> <head> <remote>+'
|
|
. git-sh-setup
|
|
|
|
LF='
|
|
'
|
|
|
|
all_strategies='recursive octopus resolve stupid ours'
|
|
default_twohead_strategies='recursive'
|
|
default_octopus_strategies='octopus'
|
|
no_trivial_merge_strategies='ours'
|
|
use_strategies=
|
|
|
|
index_merge=t
|
|
if test "@@NO_PYTHON@@"; then
|
|
all_strategies='resolve octopus stupid ours'
|
|
default_twohead_strategies='resolve'
|
|
fi
|
|
|
|
dropsave() {
|
|
rm -f -- "$GIT_DIR/MERGE_HEAD" "$GIT_DIR/MERGE_MSG" \
|
|
"$GIT_DIR/MERGE_SAVE" || exit 1
|
|
}
|
|
|
|
savestate() {
|
|
# Stash away any local modifications.
|
|
git-diff-index -z --name-only $head |
|
|
cpio -0 -o >"$GIT_DIR/MERGE_SAVE"
|
|
}
|
|
|
|
restorestate() {
|
|
if test -f "$GIT_DIR/MERGE_SAVE"
|
|
then
|
|
git reset --hard $head
|
|
cpio -iuv <"$GIT_DIR/MERGE_SAVE"
|
|
git-update-index --refresh >/dev/null
|
|
fi
|
|
}
|
|
|
|
finish () {
|
|
test '' = "$2" || echo "$2"
|
|
case "$merge_msg" in
|
|
'')
|
|
echo "No merge message -- not updating HEAD"
|
|
;;
|
|
*)
|
|
git-update-ref HEAD "$1" "$head" || exit 1
|
|
;;
|
|
esac
|
|
|
|
case "$no_summary" in
|
|
'')
|
|
git-diff-tree -p -M "$head" "$1" |
|
|
git-apply --stat --summary
|
|
;;
|
|
esac
|
|
}
|
|
|
|
while case "$#" in 0) break ;; esac
|
|
do
|
|
case "$1" in
|
|
-n|--n|--no|--no-|--no-s|--no-su|--no-sum|--no-summ|\
|
|
--no-summa|--no-summar|--no-summary)
|
|
no_summary=t ;;
|
|
--no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit)
|
|
no_commit=t ;;
|
|
-s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\
|
|
--strateg=*|--strategy=*|\
|
|
-s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy)
|
|
case "$#,$1" in
|
|
*,*=*)
|
|
strategy=`expr "$1" : '-[^=]*=\(.*\)'` ;;
|
|
1,*)
|
|
usage ;;
|
|
*)
|
|
strategy="$2"
|
|
shift ;;
|
|
esac
|
|
case " $all_strategies " in
|
|
*" $strategy "*)
|
|
use_strategies="$use_strategies$strategy " ;;
|
|
*)
|
|
die "available strategies are: $all_strategies" ;;
|
|
esac
|
|
;;
|
|
-*) usage ;;
|
|
*) break ;;
|
|
esac
|
|
shift
|
|
done
|
|
|
|
merge_msg="$1"
|
|
shift
|
|
head_arg="$1"
|
|
head=$(git-rev-parse --verify "$1"^0) || usage
|
|
shift
|
|
|
|
# All the rest are remote heads
|
|
test "$#" = 0 && usage ;# we need at least one remote head.
|
|
|
|
remoteheads=
|
|
for remote
|
|
do
|
|
remotehead=$(git-rev-parse --verify "$remote"^0) ||
|
|
die "$remote - not something we can merge"
|
|
remoteheads="${remoteheads}$remotehead "
|
|
done
|
|
set x $remoteheads ; shift
|
|
|
|
case "$use_strategies" in
|
|
'')
|
|
case "$#" in
|
|
1)
|
|
use_strategies="$default_twohead_strategies" ;;
|
|
*)
|
|
use_strategies="$default_octopus_strategies" ;;
|
|
esac
|
|
;;
|
|
esac
|
|
|
|
for s in $use_strategies
|
|
do
|
|
case " $s " in
|
|
*" $no_trivial_merge_strategies "*)
|
|
index_merge=f
|
|
break
|
|
;;
|
|
esac
|
|
done
|
|
|
|
case "$#" in
|
|
1)
|
|
common=$(git-merge-base --all $head "$@")
|
|
;;
|
|
*)
|
|
common=$(git-show-branch --merge-base $head "$@")
|
|
;;
|
|
esac
|
|
echo "$head" >"$GIT_DIR/ORIG_HEAD"
|
|
|
|
case "$index_merge,$#,$common,$no_commit" in
|
|
f,*)
|
|
# We've been told not to try anything clever. Skip to real merge.
|
|
;;
|
|
?,*,'',*)
|
|
# No common ancestors found. We need a real merge.
|
|
;;
|
|
?,1,"$1",*)
|
|
# If head can reach all the merge then we are up to date.
|
|
# but first the most common case of merging one remote.
|
|
echo "Already up-to-date."
|
|
dropsave
|
|
exit 0
|
|
;;
|
|
?,1,"$head",*)
|
|
# Again the most common case of merging one remote.
|
|
echo "Updating from $head to $1"
|
|
git-update-index --refresh 2>/dev/null
|
|
new_head=$(git-rev-parse --verify "$1^0") &&
|
|
git-read-tree -u -v -m $head "$new_head" &&
|
|
finish "$new_head" "Fast forward"
|
|
dropsave
|
|
exit 0
|
|
;;
|
|
?,1,?*"$LF"?*,*)
|
|
# We are not doing octopus and not fast forward. Need a
|
|
# real merge.
|
|
;;
|
|
?,1,*,)
|
|
# We are not doing octopus, not fast forward, and have only
|
|
# one common. See if it is really trivial.
|
|
git var GIT_COMMITTER_IDENT >/dev/null || exit
|
|
|
|
echo "Trying really trivial in-index merge..."
|
|
git-update-index --refresh 2>/dev/null
|
|
if git-read-tree --trivial -m -u -v $common $head "$1" &&
|
|
result_tree=$(git-write-tree)
|
|
then
|
|
echo "Wonderful."
|
|
result_commit=$(
|
|
echo "$merge_msg" |
|
|
git-commit-tree $result_tree -p HEAD -p "$1"
|
|
) || exit
|
|
finish "$result_commit" "In-index merge"
|
|
dropsave
|
|
exit 0
|
|
fi
|
|
echo "Nope."
|
|
;;
|
|
*)
|
|
# An octopus. If we can reach all the remote we are up to date.
|
|
up_to_date=t
|
|
for remote
|
|
do
|
|
common_one=$(git-merge-base --all $head $remote)
|
|
if test "$common_one" != "$remote"
|
|
then
|
|
up_to_date=f
|
|
break
|
|
fi
|
|
done
|
|
if test "$up_to_date" = t
|
|
then
|
|
echo "Already up-to-date. Yeeah!"
|
|
dropsave
|
|
exit 0
|
|
fi
|
|
;;
|
|
esac
|
|
|
|
# We are going to make a new commit.
|
|
git var GIT_COMMITTER_IDENT >/dev/null || exit
|
|
|
|
# At this point, we need a real merge. No matter what strategy
|
|
# we use, it would operate on the index, possibly affecting the
|
|
# working tree, and when resolved cleanly, have the desired tree
|
|
# in the index -- this means that the index must be in sync with
|
|
# the $head commit. The strategies are responsible to ensure this.
|
|
|
|
case "$use_strategies" in
|
|
?*' '?*)
|
|
# Stash away the local changes so that we can try more than one.
|
|
savestate
|
|
single_strategy=no
|
|
;;
|
|
*)
|
|
rm -f "$GIT_DIR/MERGE_SAVE"
|
|
single_strategy=yes
|
|
;;
|
|
esac
|
|
|
|
result_tree= best_cnt=-1 best_strategy= wt_strategy=
|
|
merge_was_ok=
|
|
for strategy in $use_strategies
|
|
do
|
|
test "$wt_strategy" = '' || {
|
|
echo "Rewinding the tree to pristine..."
|
|
restorestate
|
|
}
|
|
case "$single_strategy" in
|
|
no)
|
|
echo "Trying merge strategy $strategy..."
|
|
;;
|
|
esac
|
|
|
|
# Remember which strategy left the state in the working tree
|
|
wt_strategy=$strategy
|
|
|
|
git-merge-$strategy $common -- "$head_arg" "$@"
|
|
exit=$?
|
|
if test "$no_commit" = t && test "$exit" = 0
|
|
then
|
|
merge_was_ok=t
|
|
exit=1 ;# pretend it left conflicts.
|
|
fi
|
|
|
|
test "$exit" = 0 || {
|
|
|
|
# The backend exits with 1 when conflicts are left to be resolved,
|
|
# with 2 when it does not handle the given merge at all.
|
|
|
|
if test "$exit" -eq 1
|
|
then
|
|
cnt=`{
|
|
git-diff-files --name-only
|
|
git-ls-files --unmerged
|
|
} | wc -l`
|
|
if test $best_cnt -le 0 -o $cnt -le $best_cnt
|
|
then
|
|
best_strategy=$strategy
|
|
best_cnt=$cnt
|
|
fi
|
|
fi
|
|
continue
|
|
}
|
|
|
|
# Automerge succeeded.
|
|
result_tree=$(git-write-tree) && break
|
|
done
|
|
|
|
# If we have a resulting tree, that means the strategy module
|
|
# auto resolved the merge cleanly.
|
|
if test '' != "$result_tree"
|
|
then
|
|
parents=$(git-show-branch --independent "$head" "$@" | sed -e 's/^/-p /')
|
|
result_commit=$(echo "$merge_msg" | git-commit-tree $result_tree $parents) || exit
|
|
finish "$result_commit" "Merge $result_commit, made by $wt_strategy."
|
|
dropsave
|
|
exit 0
|
|
fi
|
|
|
|
# Pick the result from the best strategy and have the user fix it up.
|
|
case "$best_strategy" in
|
|
'')
|
|
restorestate
|
|
echo >&2 "No merge strategy handled the merge."
|
|
exit 2
|
|
;;
|
|
"$wt_strategy")
|
|
# We already have its result in the working tree.
|
|
;;
|
|
*)
|
|
echo "Rewinding the tree to pristine..."
|
|
restorestate
|
|
echo "Using the $best_strategy to prepare resolving by hand."
|
|
git-merge-$best_strategy $common -- "$head_arg" "$@"
|
|
;;
|
|
esac
|
|
for remote
|
|
do
|
|
echo $remote
|
|
done >"$GIT_DIR/MERGE_HEAD"
|
|
echo "$merge_msg" >"$GIT_DIR/MERGE_MSG"
|
|
|
|
if test "$merge_was_ok" = t
|
|
then
|
|
echo >&2 \
|
|
"Automatic merge went well; stopped before committing as requested"
|
|
exit 0
|
|
else
|
|
{
|
|
echo '
|
|
Conflicts:
|
|
'
|
|
git ls-files --unmerged |
|
|
sed -e 's/^[^ ]* / /' |
|
|
uniq
|
|
} >>"$GIT_DIR/MERGE_MSG"
|
|
if test -d "$GIT_DIR/rr-cache"
|
|
then
|
|
git-rerere
|
|
fi
|
|
die "Automatic merge failed; fix conflicts and then commit the result."
|
|
fi
|