X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=git-merge.sh;h=c2092a204035ad0315a3d37ed2f70097e68ed052;hb=511707d42b3b3e57d9623493092590546ffeae80;hp=485253032adf002f9c5845091b5e93aa50f26b80;hpb=5be60078c935ed08ee8eb5a32680bdfb6bb5bdf3;p=git.git

diff --git a/git-merge.sh b/git-merge.sh
index 485253032..c2092a204 100755
--- a/git-merge.sh
+++ b/git-merge.sh
@@ -3,7 +3,7 @@
 # Copyright (c) 2005 Junio C Hamano
 #
 
-USAGE='[-n] [--summary] [--no-commit] [--squash] [-s <strategy>] [-m=<merge-message>] <commit>+'
+USAGE='[-n] [--summary] [--[no-]commit] [--[no-]squash] [--[no-]ff] [-s <strategy>] [-m=<merge-message>] <commit>+'
 
 SUBDIRECTORY_OK=Yes
 . git-sh-setup
@@ -19,10 +19,12 @@ LF='
 all_strategies='recur recursive octopus resolve stupid ours subtree'
 default_twohead_strategies='recursive'
 default_octopus_strategies='octopus'
-no_trivial_merge_strategies='ours subtree'
+no_fast_forward_strategies='subtree ours'
+no_trivial_strategies='recursive recur subtree ours'
 use_strategies=
 
-index_merge=t
+allow_fast_forward=t
+allow_trivial_merge=t
 
 dropsave() {
 	rm -f -- "$GIT_DIR/MERGE_HEAD" "$GIT_DIR/MERGE_MSG" \
@@ -57,7 +59,7 @@ finish_up_to_date () {
 squash_message () {
 	echo Squashed commit of the following:
 	echo
-	git log --no-merges ^"$head" $remote
+	git log --no-merges ^"$head" $remoteheads
 }
 
 finish () {
@@ -80,6 +82,7 @@ finish () {
 			;;
 		*)
 			git update-ref -m "$rlogm" HEAD "$1" "$head" || exit 1
+			git gc --auto
 			;;
 		esac
 		;;
@@ -95,6 +98,19 @@ finish () {
 		fi
 		;;
 	esac
+
+	# Run a post-merge hook
+        if test -x "$GIT_DIR"/hooks/post-merge
+        then
+	    case "$squash" in
+	    t)
+                "$GIT_DIR"/hooks/post-merge 1
+		;;
+	    '')
+                "$GIT_DIR"/hooks/post-merge 0
+		;;
+	    esac
+        fi
 }
 
 merge_name () {
@@ -117,11 +133,7 @@ merge_name () {
 	fi
 }
 
-case "$#" in 0) usage ;; esac
-
-have_message=
-while case "$#" in 0) break ;; esac
-do
+parse_option () {
 	case "$1" in
 	-n|--n|--no|--no-|--no-s|--no-su|--no-sum|--no-summ|\
 		--no-summa|--no-summar|--no-summary)
@@ -129,9 +141,17 @@ do
 	--summary)
 		show_diffstat=t ;;
 	--sq|--squ|--squa|--squas|--squash)
-		squash=t no_commit=t ;;
+		allow_fast_forward=t squash=t no_commit=t ;;
+	--no-sq|--no-squ|--no-squa|--no-squas|--no-squash)
+		allow_fast_forward=t squash= no_commit= ;;
+	--c|--co|--com|--comm|--commi|--commit)
+		allow_fast_forward=t squash= no_commit= ;;
 	--no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit)
-		no_commit=t ;;
+		allow_fast_forward=t squash= no_commit=t ;;
+	--ff)
+		allow_fast_forward=t squash= no_commit= ;;
+	--no-ff)
+		allow_fast_forward=false squash= no_commit= ;;
 	-s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\
 		--strateg=*|--strategy=*|\
 	-s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy)
@@ -164,9 +184,42 @@ do
 		have_message=t
 		;;
 	-*)	usage ;;
-	*)	break ;;
+	*)	return 1 ;;
 	esac
 	shift
+	args_left=$#
+}
+
+parse_config () {
+	while test $# -gt 0
+	do
+		parse_option "$@" || usage
+		while test $args_left -lt $#
+		do
+			shift
+		done
+	done
+}
+
+test $# != 0 || usage
+
+have_message=
+
+if branch=$(git-symbolic-ref -q HEAD)
+then
+	mergeopts=$(git config "branch.${branch#refs/heads/}.mergeoptions")
+	if test -n "$mergeopts"
+	then
+		parse_config $mergeopts
+	fi
+fi
+
+while parse_option "$@"
+do
+	while test $args_left -lt $#
+	do
+		shift
+	done
 done
 
 if test -z "$show_diffstat"; then
@@ -265,11 +318,20 @@ esac
 
 for s in $use_strategies
 do
-	for nt in $no_trivial_merge_strategies
+	for ss in $no_fast_forward_strategies
 	do
 		case " $s " in
-		*" $nt "*)
-			index_merge=f
+		*" $ss "*)
+			allow_fast_forward=f
+			break
+			;;
+		esac
+	done
+	for ss in $no_trivial_strategies
+	do
+		case " $s " in
+		*" $ss "*)
+			allow_trivial_merge=f
 			break
 			;;
 		esac
@@ -286,10 +348,7 @@ case "$#" in
 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.
-	;;
+case "$allow_fast_forward,$#,$common,$no_commit" in
 ?,*,'',*)
 	# No common ancestors found. We need a real merge.
 	;;
@@ -299,7 +358,7 @@ f,*)
 	finish_up_to_date "Already up-to-date."
 	exit 0
 	;;
-?,1,"$head",*)
+t,1,"$head",*)
 	# Again the most common case of merging one remote.
 	echo "Updating $(git rev-parse --short $head)..$(git rev-parse --short $1)"
 	git update-index --refresh 2>/dev/null
@@ -322,11 +381,8 @@ f,*)
 	# We are not doing octopus, not fast forward, and have only
 	# one common.
 	git update-index --refresh 2>/dev/null
-	case " $use_strategies " in
-	*' recursive '*|*' recur '*)
-		: run merge later
-		;;
-	*)
+	case "$allow_trivial_merge" in
+	t)
 		# See if it is really trivial.
 		git var GIT_COMMITTER_IDENT >/dev/null || exit
 		echo "Trying really trivial in-index merge..."
@@ -439,7 +495,13 @@ done
 # auto resolved the merge cleanly.
 if test '' != "$result_tree"
 then
-    parents=$(git show-branch --independent "$head" "$@" | sed -e 's/^/-p /')
+    if test "$allow_fast_forward" = "t"
+    then
+        parents=$(git show-branch --independent "$head" "$@")
+    else
+        parents=$(git rev-parse "$head" "$@")
+    fi
+    parents=$(echo "$parents" | sed -e 's/^/-p /')
     result_commit=$(printf '%s\n' "$merge_msg" | git commit-tree $result_tree $parents) || exit
     finish "$result_commit" "Merge made by $wt_strategy."
     dropsave
@@ -496,9 +558,6 @@ Conflicts:
 		sed -e 's/^[^	]*	/	/' |
 		uniq
 	} >>"$GIT_DIR/MERGE_MSG"
-	if test -d "$GIT_DIR/rr-cache"
-	then
-		git rerere
-	fi
+	git rerere
 	die "Automatic merge failed; fix conflicts and then commit the result."
 fi