[PATCH] HTTP partial transfer support for object, pack, and index transfers

[git.git] / git-merge.sh

diff --git a/git-merge.sh b/git-merge.sh
index 413bfca..29e86c6 100755 (executable)
--- a/git-merge.sh
+++ b/git-merge.sh
@@ -19,18 +19,23 @@ default_strategies='resolve octopus'
 use_strategies=
 
 dropsave() {
-       rm -f -- "$GIT_DIR/MERGE_HEAD" \
+       rm -f -- "$GIT_DIR/MERGE_HEAD" "$GIT_DIR/MERGE_MSG" \
                 "$GIT_DIR/MERGE_SAVE" || exit 1
 }
 
 savestate() {
-       git diff -r -z --name-only $head | cpio -0 -o >"$GIR_DIR/MERGE_SAVE"
+       # Stash away any local modifications.
+       git-diff-index -r -z --name-only $head |
+       cpio -0 -o >"$GIR_DIR/MERGE_SAVE"
 }
 
 restorestate() {
-       git reset --hard $head
-       cpio -iuv <"$GIT_DIR/MERGE_SAVE"
-       git-update-index --refresh >/dev/null
+        if test -f "$GIT_DIR/MERGE_SAVE"
+       then
+               git reset --hard $head
+               cpio -iuv <"$GIT_DIR/MERGE_SAVE"
+               git-update-index --refresh >/dev/null
+       fi
 }
 
 summary() {
@@ -111,8 +116,9 @@ case "$#,$common" in
        # Again the most common case of merging one remote.
        echo "Updating from $head to $1."
        git-update-index --refresh 2>/dev/null
-       git-read-tree -u -m $head "$1" || exit 1
-       git-rev-parse --verify "$1^0" > "$GIT_DIR/HEAD"
+       git-read-tree -u -m $head "$1" &&
+       new_head=$(git-rev-parse --verify "$1^0") &&
+       git-update-ref HEAD "$new_head" "$head" || exit 1
        summary "$1"
        dropsave
        exit 0
@@ -146,12 +152,7 @@ esac
 # we use, it would operate on the index, possibly affecting the
 # working tree, and when resolved cleanly, have the desired tree
 # in the index -- this means that the index must be in sync with
-# the $head commit.
-files=$(git-diff-index --cached --name-only $head) || exit
-if [ "$files" ]; then
-   echo >&2 "Dirty index: cannot merge (dirty: $files)"
-   exit 1
-fi
+# the $head commit.  The strategies are responsible to ensure this.
 
 case "$use_strategies" in
 ?*' '?*)
@@ -160,6 +161,7 @@ case "$use_strategies" in
     single_strategy=no
     ;;
 *)
+    rm -f "$GIT_DIR/MERGE_SAVE"
     single_strategy=yes
     ;;
 esac
@@ -214,9 +216,9 @@ then
     do
         parents="$parents -p $remote"
     done
-    result_commit=$(echo "$merge_msg" | git-commit-tree $result_tree $parents)
+    result_commit=$(echo "$merge_msg" | git-commit-tree $result_tree $parents) || exit
     echo "Committed merge $result_commit, made by $wt_strategy."
-    echo $result_commit >"$GIT_DIR/HEAD"
+    git-update-ref HEAD $result_commit $head
     summary $result_commit
     dropsave
     exit 0
@@ -242,4 +244,6 @@ for remote
 do
        echo $remote
 done >"$GIT_DIR/MERGE_HEAD"
+echo $merge_msg >"$GIT_DIR/MERGE_MSG"
+
 die "Automatic merge failed; fix up by hand"