X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=git-am.sh;h=afe322b20fb0b40dfeb1cb17dc3cad09096e943a;hb=a06f678eb998862ea83b73e46ece32f99132935b;hp=97ec2d0c7db521047e254e53120ffc83829868a9;hpb=328b710d800dc3786fe2b8595e5553dc4a4af424;p=git.git

diff --git a/git-am.sh b/git-am.sh
index 97ec2d0c7..afe322b20 100755
--- a/git-am.sh
+++ b/git-am.sh
@@ -45,6 +45,12 @@ go_next () {
 	this=$next
 }
 
+cannot_fallback () {
+	echo "$1"
+	echo "Cannot fall back to three-way merge."
+	exit 1
+}
+
 fall_back_3way () {
     O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
 
@@ -52,19 +58,23 @@ fall_back_3way () {
     mkdir "$dotest/patch-merge-tmp-dir"
 
     # First see if the patch records the index info that we can use.
-    if git-apply -z --index-info "$dotest/patch" \
-	>"$dotest/patch-merge-index-info" 2>/dev/null &&
-	GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
-	git-update-index -z --index-info <"$dotest/patch-merge-index-info" &&
-	GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
-	git-write-tree >"$dotest/patch-merge-base+" &&
-	# index has the base tree now.
-	GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
+    git-apply -z --index-info "$dotest/patch" \
+	>"$dotest/patch-merge-index-info" &&
+    GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
+    git-update-index -z --index-info <"$dotest/patch-merge-index-info" &&
+    GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
+    git-write-tree >"$dotest/patch-merge-base+" ||
+    cannot_fallback "Patch does not record usable index information."
+
+    echo Using index info to reconstruct a base tree...
+    if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
 	git-apply $binary --cached <"$dotest/patch"
     then
-	echo Using index info to reconstruct a base tree...
 	mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
 	mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
+    else
+        cannot_fallback "Did you hand edit your patch?
+It does not apply to blobs recorded in its index."
     fi
 
     test -f "$dotest/patch-merge-index" &&
@@ -77,7 +87,7 @@ fall_back_3way () {
     # 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,
+    # patch did not touch, so resolve ends up canceling them,
     # saying that we reverted all those changes.
 
     git-merge-resolve $orig_tree -- HEAD $his_tree || {
@@ -91,13 +101,14 @@ fall_back_3way () {
 }
 
 prec=4
+rloga=am
 dotest=.dotest sign= utf8= keep= skip= interactive= resolved= binary= ws= resolvemsg=
 
 while case "$#" in 0) break;; esac
 do
 	case "$1" in
 	-d=*|--d=*|--do=*|--dot=*|--dote=*|--dotes=*|--dotest=*)
-	dotest=`expr "$1" : '-[^=]*=\(.*\)'`; shift ;;
+	dotest=`expr "z$1" : 'z-[^=]*=\(.*\)'`; shift ;;
 	-d|--d|--do|--dot|--dote|--dotes|--dotest)
 	case "$#" in 1) usage ;; esac; shift
 	dotest="$1"; shift;;
@@ -130,6 +141,9 @@ do
 	--resolvemsg=*)
 	resolvemsg=$(echo "$1" | sed -e "s/^--resolvemsg=//"); shift ;;
 
+	--reflog-action=*)
+	rloga=`expr "z$1" : 'z-[^=]*=\(.*\)'`; shift ;;
+
 	--)
 	shift; break ;;
 	-*)
@@ -152,7 +166,24 @@ fi
 
 if test -d "$dotest"
 then
-	test ",$#," = ",0," ||
+	case "$#,$skip$resolved" in
+	0,*t*)
+		# Explicit resume command and we do not have file, so
+		# we are happy.
+		: ;;
+	0,)
+		# No file input but without resume parameters; catch
+		# user error to feed us a patch from standard input
+		# when there is already .dotest.  This is somewhat
+		# unreliable -- stdin could be /dev/null for example
+		# and the caller did not intend to feed us a patch but
+		# wanted to continue unattended.
+		tty -s
+		;;
+	*)
+		false
+		;;
+	esac ||
 	die "previous dotest directory $dotest still exists but mbox given."
 	resume=yes
 else
@@ -413,7 +444,7 @@ do
 	parent=$(git-rev-parse --verify HEAD) &&
 	commit=$(git-commit-tree $tree -p $parent <"$dotest/final-commit") &&
 	echo Committed: $commit &&
-	git-update-ref HEAD $commit $parent ||
+	git-update-ref -m "$rloga: $SUBJECT" HEAD $commit $parent ||
 	stop_here $this
 
 	if test -x "$GIT_DIR"/hooks/post-applypatch