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[gitweb.git] / git-rebase--interactive.sh
index f3950767ea6256cd9c2dceabbe7c91fa62e3f3aa..f28c3df204214f691de87cb48c513f1eb5d767e6 100755 (executable)
@@ -17,8 +17,10 @@ USAGE='(--continue | --abort | --skip | [--preserve-merges] [--verbose]
 require_work_tree
 
 DOTEST="$GIT_DIR/.dotest-merge"
-TODO="$DOTEST"/todo
+TODO="$DOTEST"/git-rebase-todo
 DONE="$DOTEST"/done
+MSG="$DOTEST"/message
+SQUASH_MSG="$DOTEST"/message-squash
 REWRITTEN="$DOTEST"/rewritten
 PRESERVE_MERGES=
 STRATEGY=
@@ -31,6 +33,20 @@ warn () {
        echo "$*" >&2
 }
 
+output () {
+       case "$VERBOSE" in
+       '')
+               "$@" > "$DOTEST"/output 2>&1
+               status=$?
+               test $status != 0 &&
+                       cat "$DOTEST"/output
+               return $status
+       ;;
+       *)
+               "$@"
+       esac
+}
+
 require_clean_work_tree () {
        # test if working tree is dirty
        git rev-parse --verify HEAD > /dev/null &&
@@ -54,11 +70,15 @@ mark_action_done () {
        sed -e 1q < "$TODO" >> "$DONE"
        sed -e 1d < "$TODO" >> "$TODO".new
        mv -f "$TODO".new "$TODO"
+       count=$(($(wc -l < "$DONE")))
+       total=$(($count+$(wc -l < "$TODO")))
+       printf "Rebasing (%d/%d)\r" $count $total
+       test -z "$VERBOSE" || echo
 }
 
 make_patch () {
        parent_sha1=$(git rev-parse --verify "$1"^ 2> /dev/null)
-       git diff "$parent_sha1".."$1" > "$DOTEST"/patch
+       git diff-tree -p "$parent_sha1".."$1" > "$DOTEST"/patch
 }
 
 die_with_patch () {
@@ -76,19 +96,20 @@ die_abort () {
 }
 
 pick_one () {
-       case "$1" in -n) sha1=$2 ;; *) sha1=$1 ;; esac
-       git rev-parse --verify $sha1 || die "Invalid commit name: $sha1"
+       no_ff=
+       case "$1" in -n) sha1=$2; no_ff=t ;; *) sha1=$1 ;; esac
+       output git rev-parse --verify $sha1 || die "Invalid commit name: $sha1"
        test -d "$REWRITTEN" &&
                pick_one_preserving_merges "$@" && return
        parent_sha1=$(git rev-parse --verify $sha1^ 2>/dev/null)
        current_sha1=$(git rev-parse --verify HEAD)
-       if [ $current_sha1 = $parent_sha1 ]; then
-               git reset --hard $sha1
-               test "a$1" = a-n && git reset --soft $current_sha1
+       if test $no_ff$current_sha1 = $parent_sha1; then
+               output git reset --hard $sha1
+               test "a$1" = a-n && output git reset --soft $current_sha1
                sha1=$(git rev-parse --short $sha1)
-               warn Fast forward to $sha1
+               output warn Fast forward to $sha1
        else
-               git cherry-pick $STRATEGY "$@"
+               output git cherry-pick "$@"
        fi
 }
 
@@ -96,7 +117,7 @@ pick_one_preserving_merges () {
        case "$1" in -n) sha1=$2 ;; *) sha1=$1 ;; esac
        sha1=$(git rev-parse $sha1)
 
-       if [ -f "$DOTEST"/current-commit ]
+       if test -f "$DOTEST"/current-commit
        then
                current_commit=$(cat "$DOTEST"/current-commit) &&
                git rev-parse HEAD > "$REWRITTEN"/$current_commit &&
@@ -110,7 +131,7 @@ pick_one_preserving_merges () {
        new_parents=
        for p in $(git rev-list --parents -1 $sha1 | cut -d\  -f2-)
        do
-               if [ -f "$REWRITTEN"/$p ]
+               if test -f "$REWRITTEN"/$p
                then
                        preserve=f
                        new_p=$(cat "$REWRITTEN"/$p)
@@ -125,7 +146,7 @@ pick_one_preserving_merges () {
        done
        case $fast_forward in
        t)
-               echo "Fast forward to $sha1"
+               output warn "Fast forward to $sha1"
                test $preserve=f && echo $sha1 > "$REWRITTEN"/$sha1
                ;;
        f)
@@ -133,7 +154,7 @@ pick_one_preserving_merges () {
 
                first_parent=$(expr "$new_parents" : " \([^ ]*\)")
                # detach HEAD to current parent
-               git checkout $first_parent 2> /dev/null ||
+               output git checkout $first_parent 2> /dev/null ||
                        die "Cannot move HEAD to $first_parent"
 
                echo $sha1 > "$DOTEST"/current-commit
@@ -144,20 +165,54 @@ pick_one_preserving_merges () {
                        eval "$author_script"
                        msg="$(git cat-file commit $sha1 | \
                                sed -e '1,/^$/d' -e "s/[\"\\]/\\\\&/g")"
+                       # No point in merging the first parent, that's HEAD
+                       new_parents=${new_parents# $first_parent}
                        # NEEDSWORK: give rerere a chance
-                       if ! git merge $STRATEGY -m "$msg" $new_parents
+                       if ! output git merge $STRATEGY -m "$msg" $new_parents
                        then
                                echo "$msg" > "$GIT_DIR"/MERGE_MSG
                                die Error redoing merge $sha1
                        fi
                        ;;
                *)
-                       git cherry-pick $STRATEGY "$@" ||
+                       output git cherry-pick "$@" ||
                                die_with_patch $sha1 "Could not pick $sha1"
                esac
        esac
 }
 
+nth_string () {
+       case "$1" in
+       *1[0-9]|*[04-9]) echo "$1"th;;
+       *1) echo "$1"st;;
+       *2) echo "$1"nd;;
+       *3) echo "$1"rd;;
+       esac
+}
+
+make_squash_message () {
+       if test -f "$SQUASH_MSG"; then
+               COUNT=$(($(sed -n "s/^# This is [^0-9]*\([1-9][0-9]*\).*/\1/p" \
+                       < "$SQUASH_MSG" | tail -n 1)+1))
+               echo "# This is a combination of $COUNT commits."
+               sed -n "2,\$p" < "$SQUASH_MSG"
+       else
+               COUNT=2
+               echo "# This is a combination of two commits."
+               echo "# The first commit's message is:"
+               echo
+               git cat-file commit HEAD | sed -e '1,/^$/d'
+               echo
+       fi
+       echo "# This is the $(nth_string $COUNT) commit message:"
+       echo
+       git cat-file commit $1 | sed -e '1,/^$/d'
+}
+
+peek_next_command () {
+       sed -n "1s/ .*$//p" < "$TODO"
+}
+
 do_next () {
        test -f "$DOTEST"/message && rm "$DOTEST"/message
        test -f "$DOTEST"/author-script && rm "$DOTEST"/author-script
@@ -194,26 +249,30 @@ do_next () {
                        die "Cannot 'squash' without a previous commit"
 
                mark_action_done
-               MSG="$DOTEST"/message
-               echo "# This is a combination of two commits." > "$MSG"
-               echo "# The first commit's message is:" >> "$MSG"
-               echo >> "$MSG"
-               git cat-file commit HEAD | sed -e '1,/^$/d' >> "$MSG"
-               echo >> "$MSG"
+               make_squash_message $sha1 > "$MSG"
+               case "$(peek_next_command)" in
+               squash)
+                       EDIT_COMMIT=
+                       USE_OUTPUT=output
+                       cp "$MSG" "$SQUASH_MSG"
+               ;;
+               *)
+                       EDIT_COMMIT=-e
+                       USE_OUTPUT=
+                       test -f "$SQUASH_MSG" && rm "$SQUASH_MSG"
+               esac
+
                failed=f
+               author_script=$(get_author_ident_from_commit HEAD)
+               output git reset --soft HEAD^
                pick_one -n $sha1 || failed=t
-               echo "# And this is the 2nd commit message:" >> "$MSG"
-               echo >> "$MSG"
-               git cat-file commit $sha1 | sed -e '1,/^$/d' >> "$MSG"
-               git reset --soft HEAD^
-               author_script=$(get_author_ident_from_commit $sha1)
                echo "$author_script" > "$DOTEST"/author-script
                case $failed in
                f)
                        # This is like --amend, but with a different message
                        eval "$author_script"
                        export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
-                       git commit -F "$MSG" -e
+                       $USE_OUTPUT git commit -F "$MSG" $EDIT_COMMIT
                        ;;
                t)
                        cp "$MSG" "$GIT_DIR"/MERGE_MSG
@@ -232,7 +291,7 @@ do_next () {
        HEADNAME=$(cat "$DOTEST"/head-name) &&
        OLDHEAD=$(cat "$DOTEST"/head) &&
        SHORTONTO=$(git rev-parse --short $(cat "$DOTEST"/onto)) &&
-       if [ -d "$REWRITTEN" ]
+       if test -d "$REWRITTEN"
        then
                test -f "$DOTEST"/current-commit &&
                        current_commit=$(cat "$DOTEST"/current-commit) &&
@@ -245,7 +304,7 @@ do_next () {
        git update-ref -m "$message" $HEADNAME $NEWHEAD $OLDHEAD &&
        git symbolic-ref HEAD $HEADNAME && {
                test ! -f "$DOTEST"/verbose ||
-                       git diff --stat $(cat "$DOTEST"/head)..HEAD
+                       git diff-tree --stat $(cat "$DOTEST"/head)..HEAD
        } &&
        rm -rf "$DOTEST" &&
        warn "Successfully rebased and updated $HEADNAME."
@@ -260,7 +319,7 @@ do_rest () {
        done
 }
 
-while case $# in 0) break ;; esac
+while test $# != 0
 do
        case "$1" in
        --continue)
@@ -288,7 +347,7 @@ do
                HEADNAME=$(cat "$DOTEST"/head-name)
                HEAD=$(cat "$DOTEST"/head)
                git symbolic-ref HEAD $HEADNAME &&
-               git reset --hard $HEAD &&
+               output git reset --hard $HEAD &&
                rm -rf "$DOTEST"
                exit
                ;;
@@ -297,10 +356,9 @@ do
 
                test -d "$DOTEST" || die "No interactive rebase running"
 
-               git reset --hard && do_rest
+               output git reset --hard && do_rest
                ;;
        -s|--strategy)
-               shift
                case "$#,$1" in
                *,*=*)
                        STRATEGY="-s `expr "z$1" : 'z-[^=]*=\(.*\)'`" ;;
@@ -349,11 +407,12 @@ do
 
                require_clean_work_tree
 
-               if [ ! -z "$2"]
+               mkdir "$DOTEST" || die "Could not create temporary $DOTEST"
+               if test ! -z "$2"
                then
-                       git show-ref --verify --quiet "refs/heads/$2" ||
+                       output git show-ref --verify --quiet "refs/heads/$2" ||
                                die "Invalid branchname: $2"
-                       git checkout "$2" ||
+                       output git checkout "$2" ||
                                die "Could not checkout $2"
                fi
 
@@ -362,7 +421,6 @@ do
 
                test -z "$ONTO" && ONTO=$UPSTREAM
 
-               mkdir "$DOTEST" || die "Could not create temporary $DOTEST"
                : > "$DOTEST"/interactive || die "Could not mark as interactive"
                git symbolic-ref HEAD > "$DOTEST"/head-name ||
                        die "Could not get HEAD"
@@ -372,7 +430,7 @@ do
                echo $ONTO > "$DOTEST"/onto
                test -z "$STRATEGY" || echo "$STRATEGY" > "$DOTEST"/strategy
                test t = "$VERBOSE" && : > "$DOTEST"/verbose
-               if [ t = "$PRESERVE_MERGES" ]
+               if test t = "$PRESERVE_MERGES"
                then
                        # $REWRITTEN contains files for each commit that is
                        # reachable by at least one merge base of $HEAD and
@@ -407,20 +465,21 @@ do
 #
 EOF
                git rev-list $MERGES_OPTION --pretty=oneline --abbrev-commit \
-                       --abbrev=7 --reverse $UPSTREAM..$HEAD | \
-                       sed "s/^/pick /" >> "$TODO"
+                       --abbrev=7 --reverse --left-right --cherry-pick \
+                       $UPSTREAM...$HEAD | \
+                       sed -n "s/^>/pick /p" >> "$TODO"
 
                test -z "$(grep -ve '^$' -e '^#' < $TODO)" &&
                        die_abort "Nothing to do"
 
                cp "$TODO" "$TODO".backup
-               ${VISUAL:-${EDITOR:-vi}} "$TODO" ||
+               git_editor "$TODO" ||
                        die "Could not execute editor"
 
                test -z "$(grep -ve '^$' -e '^#' < $TODO)" &&
                        die_abort "Nothing to do"
 
-               git checkout $ONTO && do_rest
+               output git checkout $ONTO && do_rest
        esac
        shift
 done