Merge branch 'ek/maint-1.6.1-filter-branch-bare' into maint-1.6.1

diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
index 1172e47571dfe1d6dd088381d63045fd5eae3db3..1ceb57ae8302dc3f0673779cf60f70df5c26a64d 100755 (executable)
--- a/git-rebase--interactive.sh
+++ b/git-rebase--interactive.sh
@@ -115,9 +115,18 @@ mark_action_done () {
 }
 
 make_patch () {
-       parent_sha1=$(git rev-parse --verify "$1"^) ||
-               die "Cannot get patch for $1^"
-       git diff-tree -p "$parent_sha1".."$1" > "$DOTEST"/patch
+       sha1_and_parents="$(git rev-list --parents -1 "$1")"
+       case "$sha1_and_parents" in
+       ?*' '?*' '?*)
+               git diff --cc $sha1_and_parents
+               ;;
+       ?*' '?*)
+               git diff-tree -p "$1^!"
+               ;;
+       *)
+               echo "Root commit"
+               ;;
+       esac > "$DOTEST"/patch
        test -f "$DOTEST"/message ||
                git cat-file commit "$1" | sed "1,/^$/d" > "$DOTEST"/message
        test -f "$DOTEST"/author-script ||
@@ -256,9 +265,8 @@ pick_one_preserving_merges () {
                                output git merge $STRATEGY -m "$msg" \
                                        $new_parents
                        then
-                               git rerere
                                printf "%s\n" "$msg" > "$GIT_DIR"/MERGE_MSG
-                               die Error redoing merge $sha1
+                               die_with_patch $sha1 "Error redoing merge $sha1"
                        fi
                        ;;
                *)
@@ -341,7 +349,7 @@ do_next () {
        squash|s)
                comment_for_reflog squash
 
-               has_action "$DONE" ||
+               test -f "$DONE" && has_action "$DONE" ||
                        die "Cannot 'squash' without a previous commit"
 
                mark_action_done
@@ -352,17 +360,15 @@ do_next () {
                pick_one -n $sha1 || failed=t
                case "$(peek_next_command)" in
                squash|s)
-                       EDIT_COMMIT=
                        USE_OUTPUT=output
                        MSG_OPT=-F
-                       MSG_FILE="$MSG"
+                       EDIT_OR_FILE="$MSG"
                        cp "$MSG" "$SQUASH_MSG"
                        ;;
                *)
-                       EDIT_COMMIT=-e
                        USE_OUTPUT=
                        MSG_OPT=
-                       MSG_FILE=
+                       EDIT_OR_FILE=-e
                        rm -f "$SQUASH_MSG" || exit
                        cp "$MSG" "$GIT_DIR"/SQUASH_MSG
                        rm -f "$GIT_DIR"/MERGE_MSG || exit
@@ -376,7 +382,8 @@ do_next () {
                        GIT_AUTHOR_NAME="$GIT_AUTHOR_NAME" \
                        GIT_AUTHOR_EMAIL="$GIT_AUTHOR_EMAIL" \
                        GIT_AUTHOR_DATE="$GIT_AUTHOR_DATE" \
-                       $USE_OUTPUT git commit --no-verify $MSG_OPT "$MSG_FILE" $EDIT_COMMIT || failed=t
+                       $USE_OUTPUT git commit --no-verify \
+                               $MSG_OPT "$EDIT_OR_FILE" || failed=t
                fi
                if test $failed = t
                then