git-rebase--interactive.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2006 Johannes E. Schindelin
   4
   5 # SHORT DESCRIPTION
   6 #
   7 # This script makes it easy to fix up commits in the middle of a series,
   8 # and rearrange commits.
   9 #
  10 # The original idea comes from Eric W. Biederman, in
  11 # http://article.gmane.org/gmane.comp.version-control.git/22407
  12
  13 OPTIONS_KEEPDASHDASH=
  14 OPTIONS_SPEC="\
  15 git-rebase [-i] [options] [--] <upstream> [<branch>]
  16 git-rebase [-i] (--continue | --abort | --skip)
  17 --
  18  Available options are
  19 v,verbose          display a diffstat of what changed upstream
  20 onto=              rebase onto given branch instead of upstream
  21 p,preserve-merges  try to recreate merges instead of ignoring them
  22 s,strategy=        use the given merge strategy
  23 m,merge            always used (no-op)
  24 i,interactive      always used (no-op)
  25  Actions:
  26 continue           continue rebasing process
  27 abort              abort rebasing process and restore original branch
  28 skip               skip current patch and continue rebasing process
  29 no-verify          override pre-rebase hook from stopping the operation
  30 "
  31
  32 . git-sh-setup
  33 require_work_tree
  34
  35 DOTEST="$GIT_DIR/rebase-merge"
  36 TODO="$DOTEST"/git-rebase-todo
  37 DONE="$DOTEST"/done
  38 MSG="$DOTEST"/message
  39 SQUASH_MSG="$DOTEST"/message-squash
  40 REWRITTEN="$DOTEST"/rewritten
  41 DROPPED="$DOTEST"/dropped
  42 PRESERVE_MERGES=
  43 STRATEGY=
  44 ONTO=
  45 VERBOSE=
  46 OK_TO_SKIP_PRE_REBASE=
  47
  48 GIT_CHERRY_PICK_HELP="  After resolving the conflicts,
  49 mark the corrected paths with 'git add <paths>', and
  50 run 'git rebase --continue'"
  51 export GIT_CHERRY_PICK_HELP
  52
  53 warn () {
  54         echo "$*" >&2
  55 }
  56
  57 output () {
  58         case "$VERBOSE" in
  59         '')
  60                 output=$("$@" 2>&1 )
  61                 status=$?
  62                 test $status != 0 && printf "%s\n" "$output"
  63                 return $status
  64                 ;;
  65         *)
  66                 "$@"
  67                 ;;
  68         esac
  69 }
  70
  71 run_pre_rebase_hook () {
  72         if test -z "$OK_TO_SKIP_PRE_REBASE" &&
  73            test -x "$GIT_DIR/hooks/pre-rebase"
  74         then
  75                 "$GIT_DIR/hooks/pre-rebase" ${1+"$@"} || {
  76                         echo >&2 "The pre-rebase hook refused to rebase."
  77                         exit 1
  78                 }
  79         fi
  80 }
  81
  82 require_clean_work_tree () {
  83         # test if working tree is dirty
  84         git rev-parse --verify HEAD > /dev/null &&
  85         git update-index --ignore-submodules --refresh &&
  86         git diff-files --quiet --ignore-submodules &&
  87         git diff-index --cached --quiet HEAD --ignore-submodules -- ||
  88         die "Working tree is dirty"
  89 }
  90
  91 ORIG_REFLOG_ACTION="$GIT_REFLOG_ACTION"
  92
  93 comment_for_reflog () {
  94         case "$ORIG_REFLOG_ACTION" in
  95         ''|rebase*)
  96                 GIT_REFLOG_ACTION="rebase -i ($1)"
  97                 export GIT_REFLOG_ACTION
  98                 ;;
  99         esac
 100 }
 101
 102 last_count=
 103 mark_action_done () {
 104         sed -e 1q < "$TODO" >> "$DONE"
 105         sed -e 1d < "$TODO" >> "$TODO".new
 106         mv -f "$TODO".new "$TODO"
 107         count=$(grep -c '^[^#]' < "$DONE")
 108         total=$(($count+$(grep -c '^[^#]' < "$TODO")))
 109         if test "$last_count" != "$count"
 110         then
 111                 last_count=$count
 112                 printf "Rebasing (%d/%d)\r" $count $total
 113                 test -z "$VERBOSE" || echo
 114         fi
 115 }
 116
 117 make_patch () {
 118         parent_sha1=$(git rev-parse --verify "$1"^) ||
 119                 die "Cannot get patch for $1^"
 120         git diff-tree -p "$parent_sha1".."$1" > "$DOTEST"/patch
 121         test -f "$DOTEST"/message ||
 122                 git cat-file commit "$1" | sed "1,/^$/d" > "$DOTEST"/message
 123         test -f "$DOTEST"/author-script ||
 124                 get_author_ident_from_commit "$1" > "$DOTEST"/author-script
 125 }
 126
 127 die_with_patch () {
 128         make_patch "$1"
 129         git rerere
 130         die "$2"
 131 }
 132
 133 die_abort () {
 134         rm -rf "$DOTEST"
 135         die "$1"
 136 }
 137
 138 has_action () {
 139         grep '^[^#]' "$1" >/dev/null
 140 }
 141
 142 pick_one () {
 143         no_ff=
 144         case "$1" in -n) sha1=$2; no_ff=t ;; *) sha1=$1 ;; esac
 145         output git rev-parse --verify $sha1 || die "Invalid commit name: $sha1"
 146         test -d "$REWRITTEN" &&
 147                 pick_one_preserving_merges "$@" && return
 148         parent_sha1=$(git rev-parse --verify $sha1^) ||
 149                 die "Could not get the parent of $sha1"
 150         current_sha1=$(git rev-parse --verify HEAD)
 151         if test "$no_ff$current_sha1" = "$parent_sha1"; then
 152                 output git reset --hard $sha1
 153                 test "a$1" = a-n && output git reset --soft $current_sha1
 154                 sha1=$(git rev-parse --short $sha1)
 155                 output warn Fast forward to $sha1
 156         else
 157                 output git cherry-pick "$@"
 158         fi
 159 }
 160
 161 pick_one_preserving_merges () {
 162         fast_forward=t
 163         case "$1" in
 164         -n)
 165                 fast_forward=f
 166                 sha1=$2
 167                 ;;
 168         *)
 169                 sha1=$1
 170                 ;;
 171         esac
 172         sha1=$(git rev-parse $sha1)
 173
 174         if test -f "$DOTEST"/current-commit
 175         then
 176                 current_commit=$(cat "$DOTEST"/current-commit) &&
 177                 git rev-parse HEAD > "$REWRITTEN"/$current_commit &&
 178                 rm "$DOTEST"/current-commit ||
 179                 die "Cannot write current commit's replacement sha1"
 180         fi
 181
 182         echo $sha1 > "$DOTEST"/current-commit
 183
 184         # rewrite parents; if none were rewritten, we can fast-forward.
 185         new_parents=
 186         pend=" $(git rev-list --parents -1 $sha1 | cut -d' ' -f2-)"
 187         while [ "$pend" != "" ]
 188         do
 189                 p=$(expr "$pend" : ' \([^ ]*\)')
 190                 pend="${pend# $p}"
 191
 192                 if test -f "$REWRITTEN"/$p
 193                 then
 194                         new_p=$(cat "$REWRITTEN"/$p)
 195                         test $p != $new_p && fast_forward=f
 196                         case "$new_parents" in
 197                         *$new_p*)
 198                                 ;; # do nothing; that parent is already there
 199                         *)
 200                                 new_parents="$new_parents $new_p"
 201                                 ;;
 202                         esac
 203                 else
 204                         if test -f "$DROPPED"/$p
 205                         then
 206                                 fast_forward=f
 207                                 pend=" $(cat "$DROPPED"/$p)$pend"
 208                         else
 209                                 new_parents="$new_parents $p"
 210                         fi
 211                 fi
 212         done
 213         case $fast_forward in
 214         t)
 215                 output warn "Fast forward to $sha1"
 216                 output git reset --hard $sha1 ||
 217                         die "Cannot fast forward to $sha1"
 218                 ;;
 219         f)
 220                 test "a$1" = a-n && die "Refusing to squash a merge: $sha1"
 221
 222                 first_parent=$(expr "$new_parents" : ' \([^ ]*\)')
 223                 # detach HEAD to current parent
 224                 output git checkout $first_parent 2> /dev/null ||
 225                         die "Cannot move HEAD to $first_parent"
 226
 227                 case "$new_parents" in
 228                 ' '*' '*)
 229                         # redo merge
 230                         author_script=$(get_author_ident_from_commit $sha1)
 231                         eval "$author_script"
 232                         msg="$(git cat-file commit $sha1 | sed -e '1,/^$/d')"
 233                         # No point in merging the first parent, that's HEAD
 234                         new_parents=${new_parents# $first_parent}
 235                         if ! GIT_AUTHOR_NAME="$GIT_AUTHOR_NAME" \
 236                                 GIT_AUTHOR_EMAIL="$GIT_AUTHOR_EMAIL" \
 237                                 GIT_AUTHOR_DATE="$GIT_AUTHOR_DATE" \
 238                                 output git merge $STRATEGY -m "$msg" \
 239                                         $new_parents
 240                         then
 241                                 git rerere
 242                                 printf "%s\n" "$msg" > "$GIT_DIR"/MERGE_MSG
 243                                 die Error redoing merge $sha1
 244                         fi
 245                         ;;
 246                 *)
 247                         output git cherry-pick "$@" ||
 248                                 die_with_patch $sha1 "Could not pick $sha1"
 249                         ;;
 250                 esac
 251                 ;;
 252         esac
 253 }
 254
 255 nth_string () {
 256         case "$1" in
 257         *1[0-9]|*[04-9]) echo "$1"th;;
 258         *1) echo "$1"st;;
 259         *2) echo "$1"nd;;
 260         *3) echo "$1"rd;;
 261         esac
 262 }
 263
 264 make_squash_message () {
 265         if test -f "$SQUASH_MSG"; then
 266                 COUNT=$(($(sed -n "s/^# This is [^0-9]*\([1-9][0-9]*\).*/\1/p" \
 267                         < "$SQUASH_MSG" | sed -ne '$p')+1))
 268                 echo "# This is a combination of $COUNT commits."
 269                 sed -e 1d -e '2,/^./{
 270                         /^$/d
 271                 }' <"$SQUASH_MSG"
 272         else
 273                 COUNT=2
 274                 echo "# This is a combination of two commits."
 275                 echo "# The first commit's message is:"
 276                 echo
 277                 git cat-file commit HEAD | sed -e '1,/^$/d'
 278         fi
 279         echo
 280         echo "# This is the $(nth_string $COUNT) commit message:"
 281         echo
 282         git cat-file commit $1 | sed -e '1,/^$/d'
 283 }
 284
 285 peek_next_command () {
 286         sed -n "1s/ .*$//p" < "$TODO"
 287 }
 288
 289 do_next () {
 290         rm -f "$DOTEST"/message "$DOTEST"/author-script \
 291                 "$DOTEST"/amend || exit
 292         read command sha1 rest < "$TODO"
 293         case "$command" in
 294         '#'*|''|noop)
 295                 mark_action_done
 296                 ;;
 297         pick|p)
 298                 comment_for_reflog pick
 299
 300                 mark_action_done
 301                 pick_one $sha1 ||
 302                         die_with_patch $sha1 "Could not apply $sha1... $rest"
 303                 ;;
 304         edit|e)
 305                 comment_for_reflog edit
 306
 307                 mark_action_done
 308                 pick_one $sha1 ||
 309                         die_with_patch $sha1 "Could not apply $sha1... $rest"
 310                 make_patch $sha1
 311                 git rev-parse --verify HEAD > "$DOTEST"/amend
 312                 warn "Stopped at $sha1... $rest"
 313                 warn "You can amend the commit now, with"
 314                 warn
 315                 warn "  git commit --amend"
 316                 warn
 317                 warn "Once you are satisfied with your changes, run"
 318                 warn
 319                 warn "  git rebase --continue"
 320                 warn
 321                 exit 0
 322                 ;;
 323         squash|s)
 324                 comment_for_reflog squash
 325
 326                 has_action "$DONE" ||
 327                         die "Cannot 'squash' without a previous commit"
 328
 329                 mark_action_done
 330                 make_squash_message $sha1 > "$MSG"
 331                 failed=f
 332                 author_script=$(get_author_ident_from_commit HEAD)
 333                 output git reset --soft HEAD^
 334                 pick_one -n $sha1 || failed=t
 335                 case "$(peek_next_command)" in
 336                 squash|s)
 337                         EDIT_COMMIT=
 338                         USE_OUTPUT=output
 339                         MSG_OPT=-F
 340                         MSG_FILE="$MSG"
 341                         cp "$MSG" "$SQUASH_MSG"
 342                         ;;
 343                 *)
 344                         EDIT_COMMIT=-e
 345                         USE_OUTPUT=
 346                         MSG_OPT=
 347                         MSG_FILE=
 348                         rm -f "$SQUASH_MSG" || exit
 349                         cp "$MSG" "$GIT_DIR"/SQUASH_MSG
 350                         rm -f "$GIT_DIR"/MERGE_MSG || exit
 351                         ;;
 352                 esac
 353                 echo "$author_script" > "$DOTEST"/author-script
 354                 if test $failed = f
 355                 then
 356                         # This is like --amend, but with a different message
 357                         eval "$author_script"
 358                         GIT_AUTHOR_NAME="$GIT_AUTHOR_NAME" \
 359                         GIT_AUTHOR_EMAIL="$GIT_AUTHOR_EMAIL" \
 360                         GIT_AUTHOR_DATE="$GIT_AUTHOR_DATE" \
 361                         $USE_OUTPUT git commit --no-verify $MSG_OPT "$MSG_FILE" $EDIT_COMMIT || failed=t
 362                 fi
 363                 if test $failed = t
 364                 then
 365                         cp "$MSG" "$GIT_DIR"/MERGE_MSG
 366                         warn
 367                         warn "Could not apply $sha1... $rest"
 368                         die_with_patch $sha1 ""
 369                 fi
 370                 ;;
 371         *)
 372                 warn "Unknown command: $command $sha1 $rest"
 373                 die_with_patch $sha1 "Please fix this in the file $TODO."
 374                 ;;
 375         esac
 376         test -s "$TODO" && return
 377
 378         comment_for_reflog finish &&
 379         HEADNAME=$(cat "$DOTEST"/head-name) &&
 380         OLDHEAD=$(cat "$DOTEST"/head) &&
 381         SHORTONTO=$(git rev-parse --short $(cat "$DOTEST"/onto)) &&
 382         if test -d "$REWRITTEN"
 383         then
 384                 test -f "$DOTEST"/current-commit &&
 385                         current_commit=$(cat "$DOTEST"/current-commit) &&
 386                         git rev-parse HEAD > "$REWRITTEN"/$current_commit
 387                 if test -f "$REWRITTEN"/$OLDHEAD
 388                 then
 389                         NEWHEAD=$(cat "$REWRITTEN"/$OLDHEAD)
 390                 else
 391                         NEWHEAD=$OLDHEAD
 392                 fi
 393         else
 394                 NEWHEAD=$(git rev-parse HEAD)
 395         fi &&
 396         case $HEADNAME in
 397         refs/*)
 398                 message="$GIT_REFLOG_ACTION: $HEADNAME onto $SHORTONTO)" &&
 399                 git update-ref -m "$message" $HEADNAME $NEWHEAD $OLDHEAD &&
 400                 git symbolic-ref HEAD $HEADNAME
 401                 ;;
 402         esac && {
 403                 test ! -f "$DOTEST"/verbose ||
 404                         git diff-tree --stat $(cat "$DOTEST"/head)..HEAD
 405         } &&
 406         rm -rf "$DOTEST" &&
 407         git gc --auto &&
 408         warn "Successfully rebased and updated $HEADNAME."
 409
 410         exit
 411 }
 412
 413 do_rest () {
 414         while :
 415         do
 416                 do_next
 417         done
 418 }
 419
 420 # check if no other options are set
 421 is_standalone () {
 422         test $# -eq 2 -a "$2" = '--' &&
 423         test -z "$ONTO" &&
 424         test -z "$PRESERVE_MERGES" &&
 425         test -z "$STRATEGY" &&
 426         test -z "$VERBOSE"
 427 }
 428
 429 get_saved_options () {
 430         test -d "$REWRITTEN" && PRESERVE_MERGES=t
 431         test -f "$DOTEST"/strategy && STRATEGY="$(cat "$DOTEST"/strategy)"
 432         test -f "$DOTEST"/verbose && VERBOSE=t
 433 }
 434
 435 while test $# != 0
 436 do
 437         case "$1" in
 438         --no-verify)
 439                 OK_TO_SKIP_PRE_REBASE=yes
 440                 ;;
 441         --verify)
 442                 ;;
 443         --continue)
 444                 is_standalone "$@" || usage
 445                 get_saved_options
 446                 comment_for_reflog continue
 447
 448                 test -d "$DOTEST" || die "No interactive rebase running"
 449
 450                 # Sanity check
 451                 git rev-parse --verify HEAD >/dev/null ||
 452                         die "Cannot read HEAD"
 453                 git update-index --ignore-submodules --refresh &&
 454                         git diff-files --quiet --ignore-submodules ||
 455                         die "Working tree is dirty"
 456
 457                 # do we have anything to commit?
 458                 if git diff-index --cached --quiet --ignore-submodules HEAD --
 459                 then
 460                         : Nothing to commit -- skip this
 461                 else
 462                         . "$DOTEST"/author-script ||
 463                                 die "Cannot find the author identity"
 464                         amend=
 465                         if test -f "$DOTEST"/amend
 466                         then
 467                                 amend=$(git rev-parse --verify HEAD)
 468                                 test "$amend" = $(cat "$DOTEST"/amend) ||
 469                                 die "\
 470 You have uncommitted changes in your working tree. Please, commit them
 471 first and then run 'git rebase --continue' again."
 472                                 git reset --soft HEAD^ ||
 473                                 die "Cannot rewind the HEAD"
 474                         fi
 475                         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE &&
 476                         git commit --no-verify -F "$DOTEST"/message -e || {
 477                                 test -n "$amend" && git reset --soft $amend
 478                                 die "Could not commit staged changes."
 479                         }
 480                 fi
 481
 482                 require_clean_work_tree
 483                 do_rest
 484                 ;;
 485         --abort)
 486                 is_standalone "$@" || usage
 487                 get_saved_options
 488                 comment_for_reflog abort
 489
 490                 git rerere clear
 491                 test -d "$DOTEST" || die "No interactive rebase running"
 492
 493                 HEADNAME=$(cat "$DOTEST"/head-name)
 494                 HEAD=$(cat "$DOTEST"/head)
 495                 case $HEADNAME in
 496                 refs/*)
 497                         git symbolic-ref HEAD $HEADNAME
 498                         ;;
 499                 esac &&
 500                 output git reset --hard $HEAD &&
 501                 rm -rf "$DOTEST"
 502                 exit
 503                 ;;
 504         --skip)
 505                 is_standalone "$@" || usage
 506                 get_saved_options
 507                 comment_for_reflog skip
 508
 509                 git rerere clear
 510                 test -d "$DOTEST" || die "No interactive rebase running"
 511
 512                 output git reset --hard && do_rest
 513                 ;;
 514         -s)
 515                 case "$#,$1" in
 516                 *,*=*)
 517                         STRATEGY="-s "$(expr "z$1" : 'z-[^=]*=\(.*\)') ;;
 518                 1,*)
 519                         usage ;;
 520                 *)
 521                         STRATEGY="-s $2"
 522                         shift ;;
 523                 esac
 524                 ;;
 525         -m)
 526                 # we use merge anyway
 527                 ;;
 528         -v)
 529                 VERBOSE=t
 530                 ;;
 531         -p)
 532                 PRESERVE_MERGES=t
 533                 ;;
 534         -i)
 535                 # yeah, we know
 536                 ;;
 537         --onto)
 538                 shift
 539                 ONTO=$(git rev-parse --verify "$1") ||
 540                         die "Does not point to a valid commit: $1"
 541                 ;;
 542         --)
 543                 shift
 544                 run_pre_rebase_hook ${1+"$@"}
 545                 test $# -eq 1 -o $# -eq 2 || usage
 546                 test -d "$DOTEST" &&
 547                         die "Interactive rebase already started"
 548
 549                 git var GIT_COMMITTER_IDENT >/dev/null ||
 550                         die "You need to set your committer info first"
 551
 552                 comment_for_reflog start
 553
 554                 require_clean_work_tree
 555
 556                 UPSTREAM=$(git rev-parse --verify "$1") || die "Invalid base"
 557                 test -z "$ONTO" && ONTO=$UPSTREAM
 558
 559                 if test ! -z "$2"
 560                 then
 561                         output git show-ref --verify --quiet "refs/heads/$2" ||
 562                                 die "Invalid branchname: $2"
 563                         output git checkout "$2" ||
 564                                 die "Could not checkout $2"
 565                 fi
 566
 567                 HEAD=$(git rev-parse --verify HEAD) || die "No HEAD?"
 568                 mkdir "$DOTEST" || die "Could not create temporary $DOTEST"
 569
 570                 : > "$DOTEST"/interactive || die "Could not mark as interactive"
 571                 git symbolic-ref HEAD > "$DOTEST"/head-name 2> /dev/null ||
 572                         echo "detached HEAD" > "$DOTEST"/head-name
 573
 574                 echo $HEAD > "$DOTEST"/head
 575                 echo $UPSTREAM > "$DOTEST"/upstream
 576                 echo $ONTO > "$DOTEST"/onto
 577                 test -z "$STRATEGY" || echo "$STRATEGY" > "$DOTEST"/strategy
 578                 test t = "$VERBOSE" && : > "$DOTEST"/verbose
 579                 if test t = "$PRESERVE_MERGES"
 580                 then
 581                         # $REWRITTEN contains files for each commit that is
 582                         # reachable by at least one merge base of $HEAD and
 583                         # $UPSTREAM. They are not necessarily rewritten, but
 584                         # their children might be.
 585                         # This ensures that commits on merged, but otherwise
 586                         # unrelated side branches are left alone. (Think "X"
 587                         # in the man page's example.)
 588                         mkdir "$REWRITTEN" &&
 589                         for c in $(git merge-base --all $HEAD $UPSTREAM)
 590                         do
 591                                 echo $ONTO > "$REWRITTEN"/$c ||
 592                                         die "Could not init rewritten commits"
 593                         done
 594                         MERGES_OPTION=
 595                 else
 596                         MERGES_OPTION=--no-merges
 597                 fi
 598
 599                 SHORTUPSTREAM=$(git rev-parse --short $UPSTREAM)
 600                 SHORTHEAD=$(git rev-parse --short $HEAD)
 601                 SHORTONTO=$(git rev-parse --short $ONTO)
 602                 git rev-list $MERGES_OPTION --pretty=oneline --abbrev-commit \
 603                         --abbrev=7 --reverse --left-right --cherry-pick \
 604                         $UPSTREAM...$HEAD | \
 605                         sed -n "s/^>/pick /p" > "$TODO"
 606                 test -s "$TODO" || echo noop >> "$TODO"
 607                 cat >> "$TODO" << EOF
 608
 609 # Rebase $SHORTUPSTREAM..$SHORTHEAD onto $SHORTONTO
 610 #
 611 # Commands:
 612 #  p, pick = use commit
 613 #  e, edit = use commit, but stop for amending
 614 #  s, squash = use commit, but meld into previous commit
 615 #
 616 # If you remove a line here THAT COMMIT WILL BE LOST.
 617 # However, if you remove everything, the rebase will be aborted.
 618 #
 619 EOF
 620
 621                 # Watch for commits that been dropped by --cherry-pick
 622                 if test t = "$PRESERVE_MERGES"
 623                 then
 624                         mkdir "$DROPPED"
 625                         # drop the --cherry-pick parameter this time
 626                         git rev-list $MERGES_OPTION --abbrev-commit \
 627                                 --abbrev=7 $UPSTREAM...$HEAD --left-right | \
 628                                 sed -n "s/^>//p" | while read rev
 629                         do
 630                                 grep --quiet "$rev" "$TODO"
 631                                 if [ $? -ne 0 ]
 632                                 then
 633                                         # Use -f2 because if rev-list is telling this commit is not
 634                                         # worthwhile, we don't want to track its multiple heads,
 635                                         # just the history of its first-parent for others that will
 636                                         # be rebasing on top of us
 637                                         full=$(git rev-parse $rev)
 638                                         git rev-list --parents -1 $rev | cut -d' ' -f2 > "$DROPPED"/$full
 639                                 fi
 640                         done
 641                 fi
 642
 643                 has_action "$TODO" ||
 644                         die_abort "Nothing to do"
 645
 646                 cp "$TODO" "$TODO".backup
 647                 git_editor "$TODO" ||
 648                         die "Could not execute editor"
 649
 650                 has_action "$TODO" ||
 651                         die_abort "Nothing to do"
 652
 653                 git update-ref ORIG_HEAD $HEAD
 654                 output git checkout $ONTO && do_rest
 655                 ;;
 656         esac
 657         shift
 658 done