git-rebase.shon commit rebase: fix documentation formatting (81d395c)
   1#!/bin/sh
   2#
   3# Copyright (c) 2005 Junio C Hamano.
   4#
   5
   6SUBDIRECTORY_OK=Yes
   7OPTIONS_KEEPDASHDASH=
   8OPTIONS_STUCKLONG=t
   9OPTIONS_SPEC="\
  10git rebase [-i] [options] [--exec <cmd>] [--onto <newbase>] [<upstream>] [<branch>]
  11git rebase [-i] [options] [--exec <cmd>] [--onto <newbase>] --root [<branch>]
  12git rebase --continue | --abort | --skip | --edit-todo
  13--
  14 Available options are
  15v,verbose!         display a diffstat of what changed upstream
  16q,quiet!           be quiet. implies --no-stat
  17autostash          automatically stash/stash pop before and after
  18fork-point         use 'merge-base --fork-point' to refine upstream
  19onto=!             rebase onto given branch instead of upstream
  20r,rebase-merges?   try to rebase merges instead of skipping them
  21p,preserve-merges! try to recreate merges instead of ignoring them
  22s,strategy=!       use the given merge strategy
  23no-ff!             cherry-pick all commits, even if unchanged
  24m,merge!           use merging strategies to rebase
  25i,interactive!     let the user edit the list of commits to rebase
  26x,exec=!           add exec lines after each commit of the editable list
  27k,keep-empty       preserve empty commits during rebase
  28allow-empty-message allow rebasing commits with empty messages
  29f,force-rebase!    force rebase even if branch is up to date
  30X,strategy-option=! pass the argument through to the merge strategy
  31stat!              display a diffstat of what changed upstream
  32n,no-stat!         do not show diffstat of what changed upstream
  33verify             allow pre-rebase hook to run
  34rerere-autoupdate  allow rerere to update index with resolved conflicts
  35root!              rebase all reachable commits up to the root(s)
  36autosquash         move commits that begin with squash!/fixup! under -i
  37committer-date-is-author-date! passed to 'git am'
  38ignore-date!       passed to 'git am'
  39signoff            passed to 'git am'
  40whitespace=!       passed to 'git apply'
  41ignore-whitespace! passed to 'git apply'
  42C=!                passed to 'git apply'
  43S,gpg-sign?        GPG-sign commits
  44 Actions:
  45continue!          continue
  46abort!             abort and check out the original branch
  47skip!              skip current patch and continue
  48edit-todo!         edit the todo list during an interactive rebase
  49quit!              abort but keep HEAD where it is
  50show-current-patch! show the patch file being applied or merged
  51"
  52. git-sh-setup
  53set_reflog_action rebase
  54require_work_tree_exists
  55cd_to_toplevel
  56
  57LF='
  58'
  59ok_to_skip_pre_rebase=
  60resolvemsg="
  61$(gettext 'Resolve all conflicts manually, mark them as resolved with
  62"git add/rm <conflicted_files>", then run "git rebase --continue".
  63You can instead skip this commit: run "git rebase --skip".
  64To abort and get back to the state before "git rebase", run "git rebase --abort".')
  65"
  66squash_onto=
  67unset onto
  68unset restrict_revision
  69cmd=
  70strategy=
  71strategy_opts=
  72do_merge=
  73merge_dir="$GIT_DIR"/rebase-merge
  74apply_dir="$GIT_DIR"/rebase-apply
  75verbose=
  76diffstat=
  77test "$(git config --bool rebase.stat)" = true && diffstat=t
  78autostash="$(git config --bool rebase.autostash || echo false)"
  79fork_point=auto
  80git_am_opt=
  81git_format_patch_opt=
  82rebase_root=
  83force_rebase=
  84allow_rerere_autoupdate=
  85# Non-empty if a rebase was in progress when 'git rebase' was invoked
  86in_progress=
  87# One of {am, merge, interactive}
  88type=
  89# One of {"$GIT_DIR"/rebase-apply, "$GIT_DIR"/rebase-merge}
  90state_dir=
  91# One of {'', continue, skip, abort}, as parsed from command line
  92action=
  93rebase_merges=
  94rebase_cousins=
  95preserve_merges=
  96autosquash=
  97keep_empty=
  98allow_empty_message=
  99signoff=
 100test "$(git config --bool rebase.autosquash)" = "true" && autosquash=t
 101case "$(git config --bool commit.gpgsign)" in
 102true)   gpg_sign_opt=-S ;;
 103*)      gpg_sign_opt= ;;
 104esac
 105
 106read_basic_state () {
 107        test -f "$state_dir/head-name" &&
 108        test -f "$state_dir/onto" &&
 109        head_name=$(cat "$state_dir"/head-name) &&
 110        onto=$(cat "$state_dir"/onto) &&
 111        # We always write to orig-head, but interactive rebase used to write to
 112        # head. Fall back to reading from head to cover for the case that the
 113        # user upgraded git with an ongoing interactive rebase.
 114        if test -f "$state_dir"/orig-head
 115        then
 116                orig_head=$(cat "$state_dir"/orig-head)
 117        else
 118                orig_head=$(cat "$state_dir"/head)
 119        fi &&
 120        GIT_QUIET=$(cat "$state_dir"/quiet) &&
 121        test -f "$state_dir"/verbose && verbose=t
 122        test -f "$state_dir"/strategy && strategy="$(cat "$state_dir"/strategy)"
 123        test -f "$state_dir"/strategy_opts &&
 124                strategy_opts="$(cat "$state_dir"/strategy_opts)"
 125        test -f "$state_dir"/allow_rerere_autoupdate &&
 126                allow_rerere_autoupdate="$(cat "$state_dir"/allow_rerere_autoupdate)"
 127        test -f "$state_dir"/gpg_sign_opt &&
 128                gpg_sign_opt="$(cat "$state_dir"/gpg_sign_opt)"
 129        test -f "$state_dir"/signoff && {
 130                signoff="$(cat "$state_dir"/signoff)"
 131                force_rebase=t
 132        }
 133}
 134
 135write_basic_state () {
 136        echo "$head_name" > "$state_dir"/head-name &&
 137        echo "$onto" > "$state_dir"/onto &&
 138        echo "$orig_head" > "$state_dir"/orig-head &&
 139        echo "$GIT_QUIET" > "$state_dir"/quiet &&
 140        test t = "$verbose" && : > "$state_dir"/verbose
 141        test -n "$strategy" && echo "$strategy" > "$state_dir"/strategy
 142        test -n "$strategy_opts" && echo "$strategy_opts" > \
 143                "$state_dir"/strategy_opts
 144        test -n "$allow_rerere_autoupdate" && echo "$allow_rerere_autoupdate" > \
 145                "$state_dir"/allow_rerere_autoupdate
 146        test -n "$gpg_sign_opt" && echo "$gpg_sign_opt" > "$state_dir"/gpg_sign_opt
 147        test -n "$signoff" && echo "$signoff" >"$state_dir"/signoff
 148}
 149
 150output () {
 151        case "$verbose" in
 152        '')
 153                output=$("$@" 2>&1 )
 154                status=$?
 155                test $status != 0 && printf "%s\n" "$output"
 156                return $status
 157                ;;
 158        *)
 159                "$@"
 160                ;;
 161        esac
 162}
 163
 164move_to_original_branch () {
 165        case "$head_name" in
 166        refs/*)
 167                message="rebase finished: $head_name onto $onto"
 168                git update-ref -m "$message" \
 169                        $head_name $(git rev-parse HEAD) $orig_head &&
 170                git symbolic-ref \
 171                        -m "rebase finished: returning to $head_name" \
 172                        HEAD $head_name ||
 173                die "$(eval_gettext "Could not move back to \$head_name")"
 174                ;;
 175        esac
 176}
 177
 178apply_autostash () {
 179        if test -f "$state_dir/autostash"
 180        then
 181                stash_sha1=$(cat "$state_dir/autostash")
 182                if git stash apply $stash_sha1 >/dev/null 2>&1
 183                then
 184                        echo "$(gettext 'Applied autostash.')" >&2
 185                else
 186                        git stash store -m "autostash" -q $stash_sha1 ||
 187                        die "$(eval_gettext "Cannot store \$stash_sha1")"
 188                        gettext 'Applying autostash resulted in conflicts.
 189Your changes are safe in the stash.
 190You can run "git stash pop" or "git stash drop" at any time.
 191' >&2
 192                fi
 193        fi
 194}
 195
 196finish_rebase () {
 197        rm -f "$(git rev-parse --git-path REBASE_HEAD)"
 198        apply_autostash &&
 199        { git gc --auto || true; } &&
 200        rm -rf "$state_dir"
 201}
 202
 203run_specific_rebase () {
 204        if [ "$interactive_rebase" = implied ]; then
 205                GIT_EDITOR=:
 206                export GIT_EDITOR
 207                autosquash=
 208        fi
 209        . git-rebase--$type
 210        git_rebase__$type${preserve_merges:+__preserve_merges}
 211        ret=$?
 212        if test $ret -eq 0
 213        then
 214                finish_rebase
 215        elif test $ret -eq 2 # special exit status for rebase -i
 216        then
 217                apply_autostash &&
 218                rm -rf "$state_dir" &&
 219                die "Nothing to do"
 220        fi
 221        exit $ret
 222}
 223
 224run_pre_rebase_hook () {
 225        if test -z "$ok_to_skip_pre_rebase" &&
 226           test -x "$(git rev-parse --git-path hooks/pre-rebase)"
 227        then
 228                "$(git rev-parse --git-path hooks/pre-rebase)" ${1+"$@"} ||
 229                die "$(gettext "The pre-rebase hook refused to rebase.")"
 230        fi
 231}
 232
 233test -f "$apply_dir"/applying &&
 234        die "$(gettext "It looks like 'git am' is in progress. Cannot rebase.")"
 235
 236if test -d "$apply_dir"
 237then
 238        type=am
 239        state_dir="$apply_dir"
 240elif test -d "$merge_dir"
 241then
 242        if test -f "$merge_dir"/interactive
 243        then
 244                type=interactive
 245                interactive_rebase=explicit
 246        else
 247                type=merge
 248        fi
 249        state_dir="$merge_dir"
 250fi
 251test -n "$type" && in_progress=t
 252
 253total_argc=$#
 254while test $# != 0
 255do
 256        case "$1" in
 257        --no-verify)
 258                ok_to_skip_pre_rebase=yes
 259                ;;
 260        --verify)
 261                ok_to_skip_pre_rebase=
 262                ;;
 263        --continue|--skip|--abort|--quit|--edit-todo|--show-current-patch)
 264                test $total_argc -eq 2 || usage
 265                action=${1##--}
 266                ;;
 267        --onto=*)
 268                onto="${1#--onto=}"
 269                ;;
 270        --exec=*)
 271                cmd="${cmd}exec ${1#--exec=}${LF}"
 272                test -z "$interactive_rebase" && interactive_rebase=implied
 273                ;;
 274        --interactive)
 275                interactive_rebase=explicit
 276                ;;
 277        --keep-empty)
 278                keep_empty=yes
 279                ;;
 280        --allow-empty-message)
 281                allow_empty_message=--allow-empty-message
 282                ;;
 283        --no-keep-empty)
 284                keep_empty=
 285                ;;
 286        --rebase-merges)
 287                rebase_merges=t
 288                test -z "$interactive_rebase" && interactive_rebase=implied
 289                ;;
 290        --rebase-merges=*)
 291                rebase_merges=t
 292                case "${1#*=}" in
 293                rebase-cousins) rebase_cousins=t;;
 294                no-rebase-cousins) rebase_cousins=;;
 295                *) die "Unknown mode: $1";;
 296                esac
 297                test -z "$interactive_rebase" && interactive_rebase=implied
 298                ;;
 299        --preserve-merges)
 300                preserve_merges=t
 301                test -z "$interactive_rebase" && interactive_rebase=implied
 302                ;;
 303        --autosquash)
 304                autosquash=t
 305                ;;
 306        --no-autosquash)
 307                autosquash=
 308                ;;
 309        --fork-point)
 310                fork_point=t
 311                ;;
 312        --no-fork-point)
 313                fork_point=
 314                ;;
 315        --merge)
 316                do_merge=t
 317                ;;
 318        --strategy-option=*)
 319                strategy_opts="$strategy_opts $(git rev-parse --sq-quote "--${1#--strategy-option=}")"
 320                do_merge=t
 321                test -z "$strategy" && strategy=recursive
 322                ;;
 323        --strategy=*)
 324                strategy="${1#--strategy=}"
 325                do_merge=t
 326                ;;
 327        --no-stat)
 328                diffstat=
 329                ;;
 330        --stat)
 331                diffstat=t
 332                ;;
 333        --autostash)
 334                autostash=true
 335                ;;
 336        --no-autostash)
 337                autostash=false
 338                ;;
 339        --verbose)
 340                verbose=t
 341                diffstat=t
 342                GIT_QUIET=
 343                ;;
 344        --quiet)
 345                GIT_QUIET=t
 346                git_am_opt="$git_am_opt -q"
 347                verbose=
 348                diffstat=
 349                ;;
 350        --whitespace=*)
 351                git_am_opt="$git_am_opt --whitespace=${1#--whitespace=}"
 352                case "${1#--whitespace=}" in
 353                fix|strip)
 354                        force_rebase=t
 355                        ;;
 356                esac
 357                ;;
 358        --ignore-whitespace)
 359                git_am_opt="$git_am_opt $1"
 360                ;;
 361        --signoff)
 362                signoff=--signoff
 363                ;;
 364        --no-signoff)
 365                signoff=
 366                ;;
 367        --committer-date-is-author-date|--ignore-date)
 368                git_am_opt="$git_am_opt $1"
 369                force_rebase=t
 370                ;;
 371        -C*)
 372                git_am_opt="$git_am_opt $1"
 373                ;;
 374        --root)
 375                rebase_root=t
 376                ;;
 377        --force-rebase|--no-ff)
 378                force_rebase=t
 379                ;;
 380        --rerere-autoupdate|--no-rerere-autoupdate)
 381                allow_rerere_autoupdate="$1"
 382                ;;
 383        --gpg-sign)
 384                gpg_sign_opt=-S
 385                ;;
 386        --gpg-sign=*)
 387                gpg_sign_opt="-S${1#--gpg-sign=}"
 388                ;;
 389        --)
 390                shift
 391                break
 392                ;;
 393        *)
 394                usage
 395                ;;
 396        esac
 397        shift
 398done
 399test $# -gt 2 && usage
 400
 401if test -n "$action"
 402then
 403        test -z "$in_progress" && die "$(gettext "No rebase in progress?")"
 404        # Only interactive rebase uses detailed reflog messages
 405        if test "$type" = interactive && test "$GIT_REFLOG_ACTION" = rebase
 406        then
 407                GIT_REFLOG_ACTION="rebase -i ($action)"
 408                export GIT_REFLOG_ACTION
 409        fi
 410fi
 411
 412if test "$action" = "edit-todo" && test "$type" != "interactive"
 413then
 414        die "$(gettext "The --edit-todo action can only be used during interactive rebase.")"
 415fi
 416
 417case "$action" in
 418continue)
 419        # Sanity check
 420        git rev-parse --verify HEAD >/dev/null ||
 421                die "$(gettext "Cannot read HEAD")"
 422        git update-index --ignore-submodules --refresh &&
 423        git diff-files --quiet --ignore-submodules || {
 424                echo "$(gettext "You must edit all merge conflicts and then
 425mark them as resolved using git add")"
 426                exit 1
 427        }
 428        read_basic_state
 429        run_specific_rebase
 430        ;;
 431skip)
 432        output git reset --hard HEAD || exit $?
 433        read_basic_state
 434        run_specific_rebase
 435        ;;
 436abort)
 437        git rerere clear
 438        read_basic_state
 439        case "$head_name" in
 440        refs/*)
 441                git symbolic-ref -m "rebase: aborting" HEAD $head_name ||
 442                die "$(eval_gettext "Could not move back to \$head_name")"
 443                ;;
 444        esac
 445        output git reset --hard $orig_head
 446        finish_rebase
 447        exit
 448        ;;
 449quit)
 450        exec rm -rf "$state_dir"
 451        ;;
 452edit-todo)
 453        run_specific_rebase
 454        ;;
 455show-current-patch)
 456        run_specific_rebase
 457        die "BUG: run_specific_rebase is not supposed to return here"
 458        ;;
 459esac
 460
 461# Make sure no rebase is in progress
 462if test -n "$in_progress"
 463then
 464        state_dir_base=${state_dir##*/}
 465        cmd_live_rebase="git rebase (--continue | --abort | --skip)"
 466        cmd_clear_stale_rebase="rm -fr \"$state_dir\""
 467        die "
 468$(eval_gettext 'It seems that there is already a $state_dir_base directory, and
 469I wonder if you are in the middle of another rebase.  If that is the
 470case, please try
 471        $cmd_live_rebase
 472If that is not the case, please
 473        $cmd_clear_stale_rebase
 474and run me again.  I am stopping in case you still have something
 475valuable there.')"
 476fi
 477
 478if test -n "$rebase_root" && test -z "$onto"
 479then
 480        test -z "$interactive_rebase" && interactive_rebase=implied
 481fi
 482
 483if test -n "$keep_empty"
 484then
 485        test -z "$interactive_rebase" && interactive_rebase=implied
 486fi
 487
 488if test -n "$interactive_rebase"
 489then
 490        type=interactive
 491        state_dir="$merge_dir"
 492elif test -n "$do_merge"
 493then
 494        type=merge
 495        state_dir="$merge_dir"
 496else
 497        type=am
 498        state_dir="$apply_dir"
 499fi
 500
 501if test -t 2 && test -z "$GIT_QUIET"
 502then
 503        git_format_patch_opt="$git_format_patch_opt --progress"
 504fi
 505
 506if test -n "$signoff"
 507then
 508        test -n "$preserve_merges" &&
 509                die "$(gettext "error: cannot combine '--signoff' with '--preserve-merges'")"
 510        git_am_opt="$git_am_opt $signoff"
 511        force_rebase=t
 512fi
 513
 514if test -z "$rebase_root"
 515then
 516        case "$#" in
 517        0)
 518                if ! upstream_name=$(git rev-parse --symbolic-full-name \
 519                        --verify -q @{upstream} 2>/dev/null)
 520                then
 521                        . git-parse-remote
 522                        error_on_missing_default_upstream "rebase" "rebase" \
 523                                "against" "git rebase $(gettext '<branch>')"
 524                fi
 525
 526                test "$fork_point" = auto && fork_point=t
 527                ;;
 528        *)      upstream_name="$1"
 529                if test "$upstream_name" = "-"
 530                then
 531                        upstream_name="@{-1}"
 532                fi
 533                shift
 534                ;;
 535        esac
 536        upstream=$(peel_committish "${upstream_name}") ||
 537        die "$(eval_gettext "invalid upstream '\$upstream_name'")"
 538        upstream_arg="$upstream_name"
 539else
 540        if test -z "$onto"
 541        then
 542                empty_tree=$(git hash-object -t tree /dev/null)
 543                onto=$(git commit-tree $empty_tree </dev/null)
 544                squash_onto="$onto"
 545        fi
 546        unset upstream_name
 547        unset upstream
 548        test $# -gt 1 && usage
 549        upstream_arg=--root
 550fi
 551
 552# Make sure the branch to rebase onto is valid.
 553onto_name=${onto-"$upstream_name"}
 554case "$onto_name" in
 555*...*)
 556        if      left=${onto_name%...*} right=${onto_name#*...} &&
 557                onto=$(git merge-base --all ${left:-HEAD} ${right:-HEAD})
 558        then
 559                case "$onto" in
 560                ?*"$LF"?*)
 561                        die "$(eval_gettext "\$onto_name: there are more than one merge bases")"
 562                        ;;
 563                '')
 564                        die "$(eval_gettext "\$onto_name: there is no merge base")"
 565                        ;;
 566                esac
 567        else
 568                die "$(eval_gettext "\$onto_name: there is no merge base")"
 569        fi
 570        ;;
 571*)
 572        onto=$(peel_committish "$onto_name") ||
 573        die "$(eval_gettext "Does not point to a valid commit: \$onto_name")"
 574        ;;
 575esac
 576
 577# If the branch to rebase is given, that is the branch we will rebase
 578# $branch_name -- branch/commit being rebased, or HEAD (already detached)
 579# $orig_head -- commit object name of tip of the branch before rebasing
 580# $head_name -- refs/heads/<that-branch> or "detached HEAD"
 581switch_to=
 582case "$#" in
 5831)
 584        # Is it "rebase other $branchname" or "rebase other $commit"?
 585        branch_name="$1"
 586        switch_to="$1"
 587
 588        # Is it a local branch?
 589        if git show-ref --verify --quiet -- "refs/heads/$branch_name" &&
 590           orig_head=$(git rev-parse -q --verify "refs/heads/$branch_name")
 591        then
 592                head_name="refs/heads/$branch_name"
 593        # If not is it a valid ref (branch or commit)?
 594        elif orig_head=$(git rev-parse -q --verify "$branch_name")
 595        then
 596                head_name="detached HEAD"
 597
 598        else
 599                die "$(eval_gettext "fatal: no such branch/commit '\$branch_name'")"
 600        fi
 601        ;;
 6020)
 603        # Do not need to switch branches, we are already on it.
 604        if branch_name=$(git symbolic-ref -q HEAD)
 605        then
 606                head_name=$branch_name
 607                branch_name=$(expr "z$branch_name" : 'zrefs/heads/\(.*\)')
 608        else
 609                head_name="detached HEAD"
 610                branch_name=HEAD
 611        fi
 612        orig_head=$(git rev-parse --verify HEAD) || exit
 613        ;;
 614*)
 615        die "BUG: unexpected number of arguments left to parse"
 616        ;;
 617esac
 618
 619if test "$fork_point" = t
 620then
 621        new_upstream=$(git merge-base --fork-point "$upstream_name" \
 622                        "${switch_to:-HEAD}")
 623        if test -n "$new_upstream"
 624        then
 625                restrict_revision=$new_upstream
 626        fi
 627fi
 628
 629if test "$autostash" = true && ! (require_clean_work_tree) 2>/dev/null
 630then
 631        stash_sha1=$(git stash create "autostash") ||
 632        die "$(gettext 'Cannot autostash')"
 633
 634        mkdir -p "$state_dir" &&
 635        echo $stash_sha1 >"$state_dir/autostash" &&
 636        stash_abbrev=$(git rev-parse --short $stash_sha1) &&
 637        echo "$(eval_gettext 'Created autostash: $stash_abbrev')" &&
 638        git reset --hard
 639fi
 640
 641require_clean_work_tree "rebase" "$(gettext "Please commit or stash them.")"
 642
 643# Now we are rebasing commits $upstream..$orig_head (or with --root,
 644# everything leading up to $orig_head) on top of $onto
 645
 646# Check if we are already based on $onto with linear history,
 647# but this should be done only when upstream and onto are the same
 648# and if this is not an interactive rebase.
 649mb=$(git merge-base "$onto" "$orig_head")
 650if test "$type" != interactive && test "$upstream" = "$onto" &&
 651        test "$mb" = "$onto" && test -z "$restrict_revision" &&
 652        # linear history?
 653        ! (git rev-list --parents "$onto".."$orig_head" | sane_grep " .* ") > /dev/null
 654then
 655        if test -z "$force_rebase"
 656        then
 657                # Lazily switch to the target branch if needed...
 658                test -z "$switch_to" ||
 659                GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: checkout $switch_to" \
 660                        git checkout -q "$switch_to" --
 661                if test "$branch_name" = "HEAD" &&
 662                         ! git symbolic-ref -q HEAD
 663                then
 664                        say "$(eval_gettext "HEAD is up to date.")"
 665                else
 666                        say "$(eval_gettext "Current branch \$branch_name is up to date.")"
 667                fi
 668                finish_rebase
 669                exit 0
 670        else
 671                if test "$branch_name" = "HEAD" &&
 672                         ! git symbolic-ref -q HEAD
 673                then
 674                        say "$(eval_gettext "HEAD is up to date, rebase forced.")"
 675                else
 676                        say "$(eval_gettext "Current branch \$branch_name is up to date, rebase forced.")"
 677                fi
 678        fi
 679fi
 680
 681# If a hook exists, give it a chance to interrupt
 682run_pre_rebase_hook "$upstream_arg" "$@"
 683
 684if test -n "$diffstat"
 685then
 686        if test -n "$verbose"
 687        then
 688                echo "$(eval_gettext "Changes from \$mb to \$onto:")"
 689        fi
 690        # We want color (if set), but no pager
 691        GIT_PAGER='' git diff --stat --summary "$mb" "$onto"
 692fi
 693
 694test "$type" = interactive && run_specific_rebase
 695
 696# Detach HEAD and reset the tree
 697say "$(gettext "First, rewinding head to replay your work on top of it...")"
 698
 699GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: checkout $onto_name" \
 700        git checkout -q "$onto^0" || die "could not detach HEAD"
 701git update-ref ORIG_HEAD $orig_head
 702
 703# If the $onto is a proper descendant of the tip of the branch, then
 704# we just fast-forwarded.
 705if test "$mb" = "$orig_head"
 706then
 707        say "$(eval_gettext "Fast-forwarded \$branch_name to \$onto_name.")"
 708        move_to_original_branch
 709        finish_rebase
 710        exit 0
 711fi
 712
 713if test -n "$rebase_root"
 714then
 715        revisions="$onto..$orig_head"
 716else
 717        revisions="${restrict_revision-$upstream}..$orig_head"
 718fi
 719
 720run_specific_rebase