Merge git://git.bogomips.org/git-svn

diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
index 21ac20c3056062892f938297f44c7e82145e2b61..314cd364b8f4df5e170dd0ffd9e874b3e6c2737c 100755 (executable)
--- a/git-rebase--interactive.sh
+++ b/git-rebase--interactive.sh
@@ -373,17 +373,15 @@ 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
@@ -397,7 +395,8 @@ 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
@@ -443,6 +442,30 @@ do_rest () {
        done
 }
 
+# skip picking commits whose parents are unchanged
+skip_unnecessary_picks () {
+       fd=3
+       while read command sha1 rest
+       do
+               # fd=3 means we skip the command
+               case "$fd,$command,$(git rev-parse --verify --quiet $sha1^)" in
+               3,pick,"$ONTO"*|3,p,"$ONTO"*)
+                       # pick a commit whose parent is current $ONTO -> skip
+                       ONTO=$sha1
+                       ;;
+               3,#*|3,,*)
+                       # copy comments
+                       ;;
+               *)
+                       fd=1
+                       ;;
+               esac
+               echo "$command${sha1:+ }$sha1${rest:+ }$rest" >&$fd
+       done <"$TODO" >"$TODO.new" 3>>"$DONE" &&
+       mv -f "$TODO".new "$TODO" ||
+       die "Could not skip unnecessary pick commands"
+}
+
 # check if no other options are set
 is_standalone () {
        test $# -eq 2 -a "$2" = '--' &&
@@ -456,7 +479,7 @@ get_saved_options () {
        test -d "$REWRITTEN" && PRESERVE_MERGES=t
        test -f "$DOTEST"/strategy && STRATEGY="$(cat "$DOTEST"/strategy)"
        test -f "$DOTEST"/verbose && VERBOSE=t
-       test ! -s "$DOTEST"/upstream && REBASE_ROOT=t
+       test -f "$DOTEST"/rebase-root && REBASE_ROOT=t
 }
 
 while test $# != 0
@@ -571,7 +594,8 @@ first and then run 'git rebase --continue' again."
                ;;
        --)
                shift
-               test ! -z "$REBASE_ROOT" -o $# -eq 1 -o $# -eq 2 || usage
+               test -z "$REBASE_ROOT" -a $# -ge 1 -a $# -le 2 ||
+               test ! -z "$REBASE_ROOT" -a $# -le 1 || usage
                test -d "$DOTEST" &&
                        die "Interactive rebase already started"
 
@@ -585,6 +609,7 @@ first and then run 'git rebase --continue' again."
                        test -z "$ONTO" && ONTO=$UPSTREAM
                        shift
                else
+                       UPSTREAM=
                        UPSTREAM_ARG=--root
                        test -z "$ONTO" &&
                                die "You must specify --onto when using --root"
@@ -611,7 +636,12 @@ first and then run 'git rebase --continue' again."
                        echo "detached HEAD" > "$DOTEST"/head-name
 
                echo $HEAD > "$DOTEST"/head
-               echo $UPSTREAM > "$DOTEST"/upstream
+               case "$REBASE_ROOT" in
+               '')
+                       rm -f "$DOTEST"/rebase-root ;;
+               *)
+                       : >"$DOTEST"/rebase-root ;;
+               esac
                echo $ONTO > "$DOTEST"/onto
                test -z "$STRATEGY" || echo "$STRATEGY" > "$DOTEST"/strategy
                test t = "$VERBOSE" && : > "$DOTEST"/verbose
@@ -740,6 +770,8 @@ EOF
                has_action "$TODO" ||
                        die_abort "Nothing to do"
 
+               test -d "$REWRITTEN" || skip_unnecessary_picks
+
                git update-ref ORIG_HEAD $HEAD
                output git checkout $ONTO && do_rest
                ;;