Andrew's git - gitweb.git/blob - git-legacy-rebase.sh

   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
  23X,strategy-option=! pass the argument through to the merge strategy
  24no-ff!             cherry-pick all commits, even if unchanged
  25f,force-rebase!    cherry-pick all commits, even if unchanged
  26m,merge!           use merging strategies to rebase
  27i,interactive!     let the user edit the list of commits to rebase
  28x,exec=!           add exec lines after each commit of the editable list
  29k,keep-empty       preserve empty commits during rebase
  30allow-empty-message allow rebasing commits with empty messages
  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
  37signoff            add a Signed-off-by: line to each commit
  38committer-date-is-author-date! passed to 'git am'
  39ignore-date!       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=
  60
  61squash_onto=
  62unset onto
  63unset restrict_revision
  64cmd=
  65strategy=
  66strategy_opts=
  67do_merge=
  68merge_dir="$GIT_DIR"/rebase-merge
  69apply_dir="$GIT_DIR"/rebase-apply
  70verbose=
  71diffstat=
  72test "$(git config --bool rebase.stat)" = true && diffstat=t
  73autostash="$(git config --bool rebase.autostash || echo false)"
  74fork_point=auto
  75git_am_opt=
  76git_format_patch_opt=
  77rebase_root=
  78force_rebase=
  79allow_rerere_autoupdate=
  80# Non-empty if a rebase was in progress when 'git rebase' was invoked
  81in_progress=
  82# One of {am, merge, interactive}
  83type=
  84# One of {"$GIT_DIR"/rebase-apply, "$GIT_DIR"/rebase-merge}
  85state_dir=
  86# One of {'', continue, skip, abort}, as parsed from command line
  87action=
  88rebase_merges=
  89rebase_cousins=
  90preserve_merges=
  91autosquash=
  92keep_empty=
  93allow_empty_message=--allow-empty-message
  94signoff=
  95test "$(git config --bool rebase.autosquash)" = "true" && autosquash=t
  96case "$(git config --bool commit.gpgsign)" in
  97true)   gpg_sign_opt=-S ;;
  98*)      gpg_sign_opt= ;;
  99esac
 100. git-rebase--common
 101
 102read_basic_state () {
 103        test -f "$state_dir/head-name" &&
 104        test -f "$state_dir/onto" &&
 105        head_name=$(cat "$state_dir"/head-name) &&
 106        onto=$(cat "$state_dir"/onto) &&
 107        # We always write to orig-head, but interactive rebase used to write to
 108        # head. Fall back to reading from head to cover for the case that the
 109        # user upgraded git with an ongoing interactive rebase.
 110        if test -f "$state_dir"/orig-head
 111        then
 112                orig_head=$(cat "$state_dir"/orig-head)
 113        else
 114                orig_head=$(cat "$state_dir"/head)
 115        fi &&
 116        test -f "$state_dir"/quiet && GIT_QUIET=t
 117        test -f "$state_dir"/verbose && verbose=t
 118        test -f "$state_dir"/strategy && strategy="$(cat "$state_dir"/strategy)"
 119        test -f "$state_dir"/strategy_opts &&
 120                strategy_opts="$(cat "$state_dir"/strategy_opts)"
 121        test -f "$state_dir"/allow_rerere_autoupdate &&
 122                allow_rerere_autoupdate="$(cat "$state_dir"/allow_rerere_autoupdate)"
 123        test -f "$state_dir"/gpg_sign_opt &&
 124                gpg_sign_opt="$(cat "$state_dir"/gpg_sign_opt)"
 125        test -f "$state_dir"/signoff && {
 126                signoff="$(cat "$state_dir"/signoff)"
 127                force_rebase=t
 128        }
 129}
 130
 131finish_rebase () {
 132        rm -f "$(git rev-parse --git-path REBASE_HEAD)"
 133        apply_autostash &&
 134        { git gc --auto || true; } &&
 135        rm -rf "$state_dir"
 136}
 137
 138run_interactive () {
 139        GIT_CHERRY_PICK_HELP="$resolvemsg"
 140        export GIT_CHERRY_PICK_HELP
 141
 142        test -n "$keep_empty" && keep_empty="--keep-empty"
 143        test -n "$rebase_merges" && rebase_merges="--rebase-merges"
 144        test -n "$rebase_cousins" && rebase_cousins="--rebase-cousins"
 145        test -n "$autosquash" && autosquash="--autosquash"
 146        test -n "$verbose" && verbose="--verbose"
 147        test -n "$force_rebase" && force_rebase="--no-ff"
 148        test -n "$restrict_revision" && \
 149                restrict_revision="--restrict-revision=^$restrict_revision"
 150        test -n "$upstream" && upstream="--upstream=$upstream"
 151        test -n "$onto" && onto="--onto=$onto"
 152        test -n "$squash_onto" && squash_onto="--squash-onto=$squash_onto"
 153        test -n "$onto_name" && onto_name="--onto-name=$onto_name"
 154        test -n "$head_name" && head_name="--head-name=$head_name"
 155        test -n "$strategy" && strategy="--strategy=$strategy"
 156        test -n "$strategy_opts" && strategy_opts="--strategy-opts=$strategy_opts"
 157        test -n "$switch_to" && switch_to="--switch-to=$switch_to"
 158        test -n "$cmd" && cmd="--cmd=$cmd"
 159        test -n "$action" && action="--$action"
 160
 161        exec git rebase--interactive "$action" "$keep_empty" "$rebase_merges" "$rebase_cousins" \
 162                "$upstream" "$onto" "$squash_onto" "$restrict_revision" \
 163                "$allow_empty_message" "$autosquash" "$verbose" \
 164                "$force_rebase" "$onto_name" "$head_name" "$strategy" \
 165                "$strategy_opts" "$cmd" "$switch_to" \
 166                "$allow_rerere_autoupdate" "$gpg_sign_opt" "$signoff"
 167}
 168
 169run_specific_rebase () {
 170        if [ "$interactive_rebase" = implied ]; then
 171                GIT_EDITOR=:
 172                export GIT_EDITOR
 173                autosquash=
 174        fi
 175
 176        if test -n "$interactive_rebase" -a -z "$preserve_merges"
 177        then
 178                run_interactive
 179        else
 180                . git-rebase--$type
 181
 182                if test -z "$preserve_merges"
 183                then
 184                        git_rebase__$type
 185                else
 186                        git_rebase__preserve_merges
 187                fi
 188        fi
 189
 190        ret=$?
 191        if test $ret -eq 0
 192        then
 193                finish_rebase
 194        elif test $ret -eq 2 # special exit status for rebase -p
 195        then
 196                apply_autostash &&
 197                rm -rf "$state_dir" &&
 198                die "Nothing to do"
 199        fi
 200        exit $ret
 201}
 202
 203run_pre_rebase_hook () {
 204        if test -z "$ok_to_skip_pre_rebase" &&
 205           test -x "$(git rev-parse --git-path hooks/pre-rebase)"
 206        then
 207                "$(git rev-parse --git-path hooks/pre-rebase)" ${1+"$@"} ||
 208                die "$(gettext "The pre-rebase hook refused to rebase.")"
 209        fi
 210}
 211
 212test -f "$apply_dir"/applying &&
 213        die "$(gettext "It looks like 'git am' is in progress. Cannot rebase.")"
 214
 215if test -d "$apply_dir"
 216then
 217        type=am
 218        state_dir="$apply_dir"
 219elif test -d "$merge_dir"
 220then
 221        type=interactive
 222        if test -d "$merge_dir"/rewritten
 223        then
 224                type=preserve-merges
 225                interactive_rebase=explicit
 226                preserve_merges=t
 227        elif test -f "$merge_dir"/interactive
 228        then
 229                interactive_rebase=explicit
 230        fi
 231        state_dir="$merge_dir"
 232fi
 233test -n "$type" && in_progress=t
 234
 235total_argc=$#
 236while test $# != 0
 237do
 238        case "$1" in
 239        --no-verify)
 240                ok_to_skip_pre_rebase=yes
 241                ;;
 242        --verify)
 243                ok_to_skip_pre_rebase=
 244                ;;
 245        --continue|--skip|--abort|--quit|--edit-todo|--show-current-patch)
 246                test $total_argc -eq 2 || usage
 247                action=${1##--}
 248                ;;
 249        --onto=*)
 250                onto="${1#--onto=}"
 251                ;;
 252        --exec=*)
 253                cmd="${cmd}exec ${1#--exec=}${LF}"
 254                test -z "$interactive_rebase" && interactive_rebase=implied
 255                ;;
 256        --interactive)
 257                interactive_rebase=explicit
 258                ;;
 259        --keep-empty)
 260                keep_empty=yes
 261                ;;
 262        --allow-empty-message)
 263                allow_empty_message=--allow-empty-message
 264                ;;
 265        --no-keep-empty)
 266                keep_empty=
 267                ;;
 268        --rebase-merges)
 269                rebase_merges=t
 270                test -z "$interactive_rebase" && interactive_rebase=implied
 271                ;;
 272        --rebase-merges=*)
 273                rebase_merges=t
 274                case "${1#*=}" in
 275                rebase-cousins) rebase_cousins=t;;
 276                no-rebase-cousins) rebase_cousins=;;
 277                *) die "Unknown mode: $1";;
 278                esac
 279                test -z "$interactive_rebase" && interactive_rebase=implied
 280                ;;
 281        --preserve-merges)
 282                preserve_merges=t
 283                test -z "$interactive_rebase" && interactive_rebase=implied
 284                ;;
 285        --autosquash)
 286                autosquash=t
 287                ;;
 288        --no-autosquash)
 289                autosquash=
 290                ;;
 291        --fork-point)
 292                fork_point=t
 293                ;;
 294        --no-fork-point)
 295                fork_point=
 296                ;;
 297        --merge)
 298                do_merge=t
 299                ;;
 300        --strategy-option=*)
 301                strategy_opts="$strategy_opts $(git rev-parse --sq-quote "--${1#--strategy-option=}" | sed -e s/^.//)"
 302                do_merge=t
 303                test -z "$strategy" && strategy=recursive
 304                ;;
 305        --strategy=*)
 306                strategy="${1#--strategy=}"
 307                do_merge=t
 308                ;;
 309        --no-stat)
 310                diffstat=
 311                ;;
 312        --stat)
 313                diffstat=t
 314                ;;
 315        --autostash)
 316                autostash=true
 317                ;;
 318        --no-autostash)
 319                autostash=false
 320                ;;
 321        --verbose)
 322                verbose=t
 323                diffstat=t
 324                GIT_QUIET=
 325                ;;
 326        --quiet)
 327                GIT_QUIET=t
 328                git_am_opt="$git_am_opt -q"
 329                verbose=
 330                diffstat=
 331                ;;
 332        --whitespace=*)
 333                git_am_opt="$git_am_opt --whitespace=${1#--whitespace=}"
 334                case "${1#--whitespace=}" in
 335                fix|strip)
 336                        force_rebase=t
 337                        ;;
 338                warn|nowarn|error|error-all)
 339                        ;; # okay, known whitespace option
 340                *)
 341                        die "fatal: Invalid whitespace option: '${1#*=}'"
 342                        ;;
 343                esac
 344                ;;
 345        --ignore-whitespace)
 346                git_am_opt="$git_am_opt $1"
 347                ;;
 348        --signoff)
 349                signoff=--signoff
 350                ;;
 351        --no-signoff)
 352                signoff=
 353                ;;
 354        --committer-date-is-author-date|--ignore-date)
 355                git_am_opt="$git_am_opt $1"
 356                force_rebase=t
 357                ;;
 358        -C*[!0-9]*)
 359                die "fatal: switch \`C' expects a numerical value"
 360                ;;
 361        -C*)
 362                git_am_opt="$git_am_opt $1"
 363                ;;
 364        --root)
 365                rebase_root=t
 366                ;;
 367        --force-rebase|--no-ff)
 368                force_rebase=t
 369                ;;
 370        --rerere-autoupdate|--no-rerere-autoupdate)
 371                allow_rerere_autoupdate="$1"
 372                ;;
 373        --gpg-sign)
 374                gpg_sign_opt=-S
 375                ;;
 376        --gpg-sign=*)
 377                gpg_sign_opt="-S${1#--gpg-sign=}"
 378                ;;
 379        --)
 380                shift
 381                break
 382                ;;
 383        *)
 384                usage
 385                ;;
 386        esac
 387        shift
 388done
 389test $# -gt 2 && usage
 390
 391if test -n "$action"
 392then
 393        test -z "$in_progress" && die "$(gettext "No rebase in progress?")"
 394        # Only interactive rebase uses detailed reflog messages
 395        if test -n "$interactive_rebase" && test "$GIT_REFLOG_ACTION" = rebase
 396        then
 397                GIT_REFLOG_ACTION="rebase -i ($action)"
 398                export GIT_REFLOG_ACTION
 399        fi
 400fi
 401
 402if test "$action" = "edit-todo" && test -z "$interactive_rebase"
 403then
 404        die "$(gettext "The --edit-todo action can only be used during interactive rebase.")"
 405fi
 406
 407case "$action" in
 408continue)
 409        # Sanity check
 410        git rev-parse --verify HEAD >/dev/null ||
 411                die "$(gettext "Cannot read HEAD")"
 412        git update-index --ignore-submodules --refresh &&
 413        git diff-files --quiet --ignore-submodules || {
 414                echo "$(gettext "You must edit all merge conflicts and then
 415mark them as resolved using git add")"
 416                exit 1
 417        }
 418        read_basic_state
 419        run_specific_rebase
 420        ;;
 421skip)
 422        output git reset --hard HEAD || exit $?
 423        read_basic_state
 424        run_specific_rebase
 425        ;;
 426abort)
 427        git rerere clear
 428        read_basic_state
 429        case "$head_name" in
 430        refs/*)
 431                git symbolic-ref -m "rebase: aborting" HEAD $head_name ||
 432                die "$(eval_gettext "Could not move back to \$head_name")"
 433                ;;
 434        esac
 435        output git reset --hard $orig_head
 436        finish_rebase
 437        exit
 438        ;;
 439quit)
 440        exec rm -rf "$state_dir"
 441        ;;
 442edit-todo)
 443        run_specific_rebase
 444        ;;
 445show-current-patch)
 446        run_specific_rebase
 447        die "BUG: run_specific_rebase is not supposed to return here"
 448        ;;
 449esac
 450
 451# Make sure no rebase is in progress
 452if test -n "$in_progress"
 453then
 454        state_dir_base=${state_dir##*/}
 455        cmd_live_rebase="git rebase (--continue | --abort | --skip)"
 456        cmd_clear_stale_rebase="rm -fr \"$state_dir\""
 457        die "
 458$(eval_gettext 'It seems that there is already a $state_dir_base directory, and
 459I wonder if you are in the middle of another rebase.  If that is the
 460case, please try
 461        $cmd_live_rebase
 462If that is not the case, please
 463        $cmd_clear_stale_rebase
 464and run me again.  I am stopping in case you still have something
 465valuable there.')"
 466fi
 467
 468if test -n "$rebase_root" && test -z "$onto"
 469then
 470        test -z "$interactive_rebase" && interactive_rebase=implied
 471fi
 472
 473if test -n "$keep_empty"
 474then
 475        test -z "$interactive_rebase" && interactive_rebase=implied
 476fi
 477
 478actually_interactive=
 479if test -n "$interactive_rebase"
 480then
 481        if test -z "$preserve_merges"
 482        then
 483                type=interactive
 484        else
 485                type=preserve-merges
 486        fi
 487        actually_interactive=t
 488        state_dir="$merge_dir"
 489elif test -n "$do_merge"
 490then
 491        interactive_rebase=implied
 492        type=interactive
 493        state_dir="$merge_dir"
 494else
 495        type=am
 496        state_dir="$apply_dir"
 497fi
 498
 499if test -t 2 && test -z "$GIT_QUIET"
 500then
 501        git_format_patch_opt="$git_format_patch_opt --progress"
 502fi
 503
 504incompatible_opts=$(echo " $git_am_opt " | \
 505                    sed -e 's/ -q / /g' -e 's/^ \(.*\) $/\1/')
 506if test -n "$incompatible_opts"
 507then
 508        if test -n "$actually_interactive" || test "$do_merge"
 509        then
 510                die "$(gettext "fatal: cannot combine am options with either interactive or merge options")"
 511        fi
 512fi
 513
 514if test -n "$signoff"
 515then
 516        test -n "$preserve_merges" &&
 517                die "$(gettext "fatal: cannot combine '--signoff' with '--preserve-merges'")"
 518        git_am_opt="$git_am_opt $signoff"
 519        force_rebase=t
 520fi
 521
 522if test -n "$preserve_merges"
 523then
 524        # Note: incompatibility with --signoff handled in signoff block above
 525        # Note: incompatibility with --interactive is just a strong warning;
 526        #       git-rebase.txt caveats with "unless you know what you are doing"
 527        test -n "$rebase_merges" &&
 528                die "$(gettext "fatal: cannot combine '--preserve-merges' with '--rebase-merges'")"
 529fi
 530
 531if test -n "$rebase_merges"
 532then
 533        test -n "$strategy_opts" &&
 534                die "$(gettext "fatal: cannot combine '--rebase-merges' with '--strategy-option'")"
 535        test -n "$strategy" &&
 536                die "$(gettext "fatal: cannot combine '--rebase-merges' with '--strategy'")"
 537fi
 538
 539if test -z "$rebase_root"
 540then
 541        case "$#" in
 542        0)
 543                if ! upstream_name=$(git rev-parse --symbolic-full-name \
 544                        --verify -q @{upstream} 2>/dev/null)
 545                then
 546                        . git-parse-remote
 547                        error_on_missing_default_upstream "rebase" "rebase" \
 548                                "against" "git rebase $(gettext '<branch>')"
 549                fi
 550
 551                test "$fork_point" = auto && fork_point=t
 552                ;;
 553        *)      upstream_name="$1"
 554                if test "$upstream_name" = "-"
 555                then
 556                        upstream_name="@{-1}"
 557                fi
 558                shift
 559                ;;
 560        esac
 561        upstream=$(peel_committish "${upstream_name}") ||
 562        die "$(eval_gettext "invalid upstream '\$upstream_name'")"
 563        upstream_arg="$upstream_name"
 564else
 565        if test -z "$onto"
 566        then
 567                empty_tree=$(git hash-object -t tree /dev/null)
 568                onto=$(git commit-tree $empty_tree </dev/null)
 569                squash_onto="$onto"
 570        fi
 571        unset upstream_name
 572        unset upstream
 573        test $# -gt 1 && usage
 574        upstream_arg=--root
 575fi
 576
 577# Make sure the branch to rebase onto is valid.
 578onto_name=${onto-"$upstream_name"}
 579case "$onto_name" in
 580*...*)
 581        if      left=${onto_name%...*} right=${onto_name#*...} &&
 582                onto=$(git merge-base --all ${left:-HEAD} ${right:-HEAD})
 583        then
 584                case "$onto" in
 585                ?*"$LF"?*)
 586                        die "$(eval_gettext "\$onto_name: there are more than one merge bases")"
 587                        ;;
 588                '')
 589                        die "$(eval_gettext "\$onto_name: there is no merge base")"
 590                        ;;
 591                esac
 592        else
 593                die "$(eval_gettext "\$onto_name: there is no merge base")"
 594        fi
 595        ;;
 596*)
 597        onto=$(peel_committish "$onto_name") ||
 598        die "$(eval_gettext "Does not point to a valid commit: \$onto_name")"
 599        ;;
 600esac
 601
 602# If the branch to rebase is given, that is the branch we will rebase
 603# $branch_name -- branch/commit being rebased, or HEAD (already detached)
 604# $orig_head -- commit object name of tip of the branch before rebasing
 605# $head_name -- refs/heads/<that-branch> or "detached HEAD"
 606switch_to=
 607case "$#" in
 6081)
 609        # Is it "rebase other $branchname" or "rebase other $commit"?
 610        branch_name="$1"
 611        switch_to="$1"
 612
 613        # Is it a local branch?
 614        if git show-ref --verify --quiet -- "refs/heads/$branch_name" &&
 615           orig_head=$(git rev-parse -q --verify "refs/heads/$branch_name")
 616        then
 617                head_name="refs/heads/$branch_name"
 618        # If not is it a valid ref (branch or commit)?
 619        elif orig_head=$(git rev-parse -q --verify "$branch_name")
 620        then
 621                head_name="detached HEAD"
 622
 623        else
 624                die "$(eval_gettext "fatal: no such branch/commit '\$branch_name'")"
 625        fi
 626        ;;
 6270)
 628        # Do not need to switch branches, we are already on it.
 629        if branch_name=$(git symbolic-ref -q HEAD)
 630        then
 631                head_name=$branch_name
 632                branch_name=$(expr "z$branch_name" : 'zrefs/heads/\(.*\)')
 633        else
 634                head_name="detached HEAD"
 635                branch_name=HEAD
 636        fi
 637        orig_head=$(git rev-parse --verify HEAD) || exit
 638        ;;
 639*)
 640        die "BUG: unexpected number of arguments left to parse"
 641        ;;
 642esac
 643
 644if test "$fork_point" = t
 645then
 646        new_upstream=$(git merge-base --fork-point "$upstream_name" \
 647                        "${switch_to:-HEAD}")
 648        if test -n "$new_upstream"
 649        then
 650                restrict_revision=$new_upstream
 651        fi
 652fi
 653
 654if test "$autostash" = true && ! (require_clean_work_tree) 2>/dev/null
 655then
 656        stash_sha1=$(git stash create "autostash") ||
 657        die "$(gettext 'Cannot autostash')"
 658
 659        mkdir -p "$state_dir" &&
 660        echo $stash_sha1 >"$state_dir/autostash" &&
 661        stash_abbrev=$(git rev-parse --short $stash_sha1) &&
 662        echo "$(eval_gettext 'Created autostash: $stash_abbrev')" &&
 663        git reset --hard
 664fi
 665
 666require_clean_work_tree "rebase" "$(gettext "Please commit or stash them.")"
 667
 668# Now we are rebasing commits $upstream..$orig_head (or with --root,
 669# everything leading up to $orig_head) on top of $onto
 670
 671# Check if we are already based on $onto with linear history,
 672# but this should be done only when upstream and onto are the same
 673# and if this is not an interactive rebase.
 674mb=$(git merge-base "$onto" "$orig_head")
 675if test -z "$actually_interactive" && test "$upstream" = "$onto" &&
 676        test "$mb" = "$onto" && test -z "$restrict_revision" &&
 677        # linear history?
 678        ! (git rev-list --parents "$onto".."$orig_head" | sane_grep " .* ") > /dev/null
 679then
 680        if test -z "$force_rebase"
 681        then
 682                # Lazily switch to the target branch if needed...
 683                test -z "$switch_to" ||
 684                GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: checkout $switch_to" \
 685                        git checkout -q "$switch_to" --
 686                if test "$branch_name" = "HEAD" &&
 687                         ! git symbolic-ref -q HEAD
 688                then
 689                        say "$(eval_gettext "HEAD is up to date.")"
 690                else
 691                        say "$(eval_gettext "Current branch \$branch_name is up to date.")"
 692                fi
 693                finish_rebase
 694                exit 0
 695        else
 696                if test "$branch_name" = "HEAD" &&
 697                         ! git symbolic-ref -q HEAD
 698                then
 699                        say "$(eval_gettext "HEAD is up to date, rebase forced.")"
 700                else
 701                        say "$(eval_gettext "Current branch \$branch_name is up to date, rebase forced.")"
 702                fi
 703        fi
 704fi
 705
 706# If a hook exists, give it a chance to interrupt
 707run_pre_rebase_hook "$upstream_arg" "$@"
 708
 709if test -n "$diffstat"
 710then
 711        if test -n "$verbose"
 712        then
 713                if test -z "$mb"
 714                then
 715                        echo "$(eval_gettext "Changes to \$onto:")"
 716                else
 717                        echo "$(eval_gettext "Changes from \$mb to \$onto:")"
 718                fi
 719        fi
 720        mb_tree="${mb:-$(git hash-object -t tree /dev/null)}"
 721        # We want color (if set), but no pager
 722        GIT_PAGER='' git diff --stat --summary "$mb_tree" "$onto"
 723fi
 724
 725if test -z "$actually_interactive" && test "$mb" = "$orig_head"
 726then
 727        say "$(eval_gettext "Fast-forwarded \$branch_name to \$onto_name.")"
 728        GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: checkout $onto_name" \
 729                git checkout -q "$onto^0" || die "could not detach HEAD"
 730        # If the $onto is a proper descendant of the tip of the branch, then
 731        # we just fast-forwarded.
 732        git update-ref ORIG_HEAD $orig_head
 733        move_to_original_branch
 734        finish_rebase
 735        exit 0
 736fi
 737
 738test -n "$interactive_rebase" && run_specific_rebase
 739
 740# Detach HEAD and reset the tree
 741say "$(gettext "First, rewinding head to replay your work on top of it...")"
 742
 743GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: checkout $onto_name" \
 744        git checkout -q "$onto^0" || die "could not detach HEAD"
 745git update-ref ORIG_HEAD $orig_head
 746
 747if test -n "$rebase_root"
 748then
 749        revisions="$onto..$orig_head"
 750else
 751        revisions="${restrict_revision-$upstream}..$orig_head"
 752fi
 753
 754run_specific_rebase