[PATCH 1/2] lib-rebase.sh: fake-editor.sh: Allow checking of commit header(s) in $GIT_EDITOR

@@ -4,6 +4,8 @@
 #
 # - override the commit message with $FAKE_COMMIT_MESSAGE
 # - amend the commit message with $FAKE_COMMIT_AMEND
+# - check that the commit header(s) text shown in the editor matches that in the
+#   file $EXPECT_HEADER.
 # - check that non-commit messages have a certain line count with $EXPECT_COUNT
 # - check the commit count in the commit message header with $EXPECT_HEADER_COUNT
 # - rewrite a rebase -i script as directed by $FAKE_LINES.

@@ -34,6 +36,12 @@ case "$1" in
 	exit
 	;;
 esac
+test -z "$EXPECT_HEADER" ||
+	(
+		grep '^pick' < "$1" | cut -d' ' -f3- > commit_headers.$$ &&
+		diff "$EXPECT_HEADER" commit_headers.$$ > /dev/null
+	) ||
+	exit
 test -z "$EXPECT_COUNT" ||
 	test "$EXPECT_COUNT" = $(sed -e '/^#/d' -e '/^$/d' < "$1" | wc -l) ||
 	exit