[ SEA-GHOST MINI SHELL]
#!/bin/sh
#
# Copyright (c) 2005 Linus Torvalds
#
# Resolve two trees.
#
echo 'WARNING: This command is DEPRECATED and will be removed very soon.' >&2
echo 'WARNING: Please use git-merge or git-pull instead.' >&2
sleep 2
USAGE='<head> <remote> <merge-message>'
. git-sh-setup
dropheads() {
rm -f -- "$GIT_DIR/MERGE_HEAD" \
"$GIT_DIR/LAST_MERGE" || exit 1
}
head=$(git rev-parse --verify "$1"^0) &&
merge=$(git rev-parse --verify "$2"^0) &&
merge_name="$2" &&
merge_msg="$3" || usage
#
# The remote name is just used for the message,
# but we do want it.
#
if [ -z "$head" -o -z "$merge" -o -z "$merge_msg" ]; then
usage
fi
dropheads
echo $head > "$GIT_DIR"/ORIG_HEAD
echo $merge > "$GIT_DIR"/LAST_MERGE
common=$(git merge-base $head $merge)
if [ -z "$common" ]; then
die "Unable to find common commit between" $merge $head
fi
case "$common" in
"$merge")
echo "Already up-to-date. Yeeah!"
dropheads
exit 0
;;
"$head")
echo "Updating $(git rev-parse --short $head)..$(git rev-parse --short $merge)"
git read-tree -u -m $head $merge || exit 1
git update-ref -m "resolve $merge_name: Fast-forward" \
HEAD "$merge" "$head"
git diff-tree -p $head $merge | git apply --stat
dropheads
exit 0
;;
esac
# We are going to make a new commit.
git var GIT_COMMITTER_IDENT >/dev/null || exit
# Find an optimum merge base if there are more than one candidates.
LF='
'
common=$(git merge-base -a $head $merge)
case "$common" in
?*"$LF"?*)
echo "Trying to find the optimum merge base."
G=.tmp-index$$
best=
best_cnt=-1
for c in $common
do
rm -f $G
GIT_INDEX_FILE=$G git read-tree -m $c $head $merge \
2>/dev/null || continue
# Count the paths that are unmerged.
cnt=`GIT_INDEX_FILE=$G git ls-files --unmerged | wc -l`
if test $best_cnt -le 0 -o $cnt -le $best_cnt
then
best=$c
best_cnt=$cnt
if test "$best_cnt" -eq 0
then
# Cannot do any better than all trivial merge.
break
fi
fi
done
rm -f $G
common="$best"
esac
echo "Trying to merge $merge into $head using $common."
git update-index --refresh 2>/dev/null
git read-tree -u -m $common $head $merge || exit 1
result_tree=$(git write-tree 2> /dev/null)
if [ $? -ne 0 ]; then
echo "Simple merge failed, trying Automatic merge"
git-merge-index -o git-merge-one-file -a
if [ $? -ne 0 ]; then
echo $merge > "$GIT_DIR"/MERGE_HEAD
die "Automatic merge failed, fix up by hand"
fi
result_tree=$(git write-tree) || exit 1
fi
result_commit=$(echo "$merge_msg" | git commit-tree $result_tree -p $head -p $merge)
echo "Committed merge $result_commit"
git update-ref -m "resolve $merge_name: In-index merge" \
HEAD "$result_commit" "$head"
git diff-tree -p $head $result_commit | git apply --stat
dropheads
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