# Copyright (c) 2005 Junio C Hamano
#
-. git-sh-setup || die "Not a git archive"
+
+USAGE='[-n] [--no-commit] [-s <strategy>]... <merge-message> <head> <remote>+'
+. git-sh-setup
LF='
'
-usage () {
- die "git-merge [-n] [-s <strategy>]... <merge-message> <head> <remote>+"
-}
-
-# all_strategies='resolve recursive stupid octopus'
-
-all_strategies='recursive octopus resolve stupid'
-default_strategies='resolve octopus'
+all_strategies='recursive octopus resolve stupid ours'
+default_strategies='recursive'
use_strategies=
dropsave() {
savestate() {
# Stash away any local modifications.
- git-diff-index -r -z --name-only $head |
+ git-diff-index -z --name-only $head |
cpio -0 -o >"$GIT_DIR/MERGE_SAVE"
}
-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)
shift
done
-case "$use_strategies" in
-'')
- use_strategies=$default_strategies
- ;;
-esac
test "$#" -le 2 && usage ;# we need at least two heads.
merge_msg="$1"
shift
# All the rest are remote heads
+remoteheads=
for remote
do
- git-rev-parse --verify "$remote"^0 >/dev/null ||
+ remotehead=$(git-rev-parse --verify "$remote"^0) ||
die "$remote - not something we can merge"
+ remoteheads="${remoteheads}$remotehead "
done
+set x $remoteheads ; shift
-common=$(git-show-branch --merge-base $head "$@")
+case "$#" in
+1)
+ common=$(git-merge-base --all $head "$@")
+ ;;
+*)
+ common=$(git-show-branch --merge-base $head "$@")
+ ;;
+esac
echo "$head" >"$GIT_DIR/ORIG_HEAD"
-case "$#,$common" in
-*,'')
+case "$#,$common,$no_commit" in
+*,'',*)
# No common ancestors found. We need a real merge.
;;
-1,"$1")
+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")
+1,"$head",*)
# Again the most common case of merging one remote.
echo "Updating from $head to $1."
git-update-index --refresh 2>/dev/null
dropsave
exit 0
;;
-1,?*"$LF"?*)
+1,?*"$LF"?*,*)
# We are not doing octopus and not fast forward. Need a
# real merge.
;;
-1,*)
+1,*,)
# We are not doing octopus, not fast forward, and have only
# one common. See if it is really trivial.
echo "Trying really trivial in-index merge..."
up_to_date=t
for remote
do
- common_one=$(git-merge-base $head $remote)
+ common_one=$(git-merge-base --all $head $remote)
if test "$common_one" != "$remote"
then
up_to_date=f
;;
esac
+case "$use_strategies" in
+'')
+ case "$#" in
+ 1)
+ use_strategies="$default_strategies" ;;
+ *)
+ use_strategies=octopus ;;
+ esac
+ ;;
+esac
+
# 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
# Remember which strategy left the state in the working tree
wt_strategy=$strategy
- git-merge-$strategy $common -- "$head_arg" "$@" || {
+ git-merge-$strategy $common -- "$head_arg" "$@"
+ exit=$?
+ if test "$no_commit" = t && test "$exit" = 0
+ then
+ exit=1 ;# pretend it left conflicts.
+ fi
+
+ test "$exit" = 0 || {
# The backend exits with 1 when conflicts are left to be resolved,
# with 2 when it does not handle the given merge at all.
- exit=$?
if test "$exit" -eq 1
then
cnt=`{
case "$best_strategy" in
'')
restorestate
- die "No merge strategy handled the merge."
+ echo >&2 "No merge strategy handled the merge."
+ exit 2
;;
"$wt_strategy")
# We already have its result in the working tree.
done >"$GIT_DIR/MERGE_HEAD"
echo $merge_msg >"$GIT_DIR/MERGE_MSG"
-die "Automatic merge failed; fix up by hand"
+die "Automatic merge failed/prevented; fix up by hand"