git-fetch/push/pull: documentation.

diff --git a/git-merge.sh b/git-merge.sh
index 29e86c695320b3d575314bc7c0be9eea0fd1b04a..3465041bc4c9b2512623ee6c06317ecb7689e528 100755 (executable)
--- a/git-merge.sh
+++ b/git-merge.sh
@@ -26,7 +26,7 @@ dropsave() {
 savestate() {
        # Stash away any local modifications.
        git-diff-index -r -z --name-only $head |
-       cpio -0 -o >"$GIR_DIR/MERGE_SAVE"
+       cpio -0 -o >"$GIT_DIR/MERGE_SAVE"
 }
 
 restorestate() {
@@ -103,7 +103,7 @@ echo "$head" >"$GIT_DIR/ORIG_HEAD"
 
 case "$#,$common" in
 *,'')
-       die "Unable to find common commit between $head_arg and $*"
+       # No common ancestors found. We need a real merge.
        ;;
 1,"$1")
        # If head can reach all the merge then we are up to date.
@@ -123,10 +123,30 @@ case "$#,$common" in
        dropsave
        exit 0
        ;;
-1,*)
+1,?*"$LF"?*)
        # We are not doing octopus and not fast forward.  Need a
        # real merge.
        ;;
+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..."
+       git-update-index --refresh 2>/dev/null
+       if git-read-tree --trivial -m -u $common $head "$1" &&
+          result_tree=$(git-write-tree)
+       then
+           echo "Wonderful."
+           result_commit=$(
+               echo "$merge_msg" |
+               git-commit-tree $result_tree -p HEAD -p "$1"
+           ) || exit
+           git-update-ref HEAD $result_commit $head
+           summary $result_commit
+           dropsave
+           exit 0
+       fi
+       echo "Nope."
+       ;;
 *)
        # An octopus.  If we can reach all the remote we are up to date.
        up_to_date=t