Andrew's git / gitweb.git / git-rebase.sh
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git-rebase.shon commit pack-objects: don't check size when the object is bad (660b373)
   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
  20p,preserve-merges! try to recreate merges instead of ignoring them
  21s,strategy=!       use the given merge strategy
  22no-ff!             cherry-pick all commits, even if unchanged
  23m,merge!           use merging strategies to rebase
  24i,interactive!     let the user edit the list of commits to rebase
  25x,exec=!           add exec lines after each commit of the editable list
  26k,keep-empty       preserve empty commits during rebase
  27allow-empty-message allow rebasing commits with empty messages
  28f,force-rebase!    force rebase even if branch is up to date
  29X,strategy-option=! pass the argument through to the merge strategy
  30stat!              display a diffstat of what changed upstream
  31n,no-stat!         do not show diffstat of what changed upstream
  32verify             allow pre-rebase hook to run
  33rerere-autoupdate  allow rerere to update index with resolved conflicts
  34root!              rebase all reachable commits up to the root(s)
  35autosquash         move commits that begin with squash!/fixup! under -i
  36committer-date-is-author-date! passed to 'git am'
  37ignore-date!       passed to 'git am'
  38signoff            passed to 'git am'
  39whitespace=!       passed to 'git apply'
  40ignore-whitespace! passed to 'git apply'
  41C=!                passed to 'git apply'
  42S,gpg-sign?        GPG-sign commits
  43 Actions:
  44continue!          continue
  45abort!             abort and check out the original branch
  46skip!              skip current patch and continue
  47edit-todo!         edit the todo list during an interactive rebase
  48quit!              abort but keep HEAD where it is
  49show-current-patch! show the patch file being applied or merged
  50"
  51. git-sh-setup
  52set_reflog_action rebase
  53require_work_tree_exists
  54cd_to_toplevel
  55
  56LF='
  57'
  58ok_to_skip_pre_rebase=
  59resolvemsg="
  60$(gettext 'Resolve all conflicts manually, mark them as resolved with
  61"git add/rm <conflicted_files>", then run "git rebase --continue".
  62You can instead skip this commit: run "git rebase --skip".
  63To abort and get back to the state before "git rebase", run "git rebase --abort".')
  64"
  65unset onto
  66unset restrict_revision
  67cmd=
  68strategy=
  69strategy_opts=
  70do_merge=
  71merge_dir="$GIT_DIR"/rebase-merge
  72apply_dir="$GIT_DIR"/rebase-apply
  73verbose=
  74diffstat=
  75test "$(git config --bool rebase.stat)" = true && diffstat=t
  76autostash="$(git config --bool rebase.autostash || echo false)"
  77fork_point=auto
  78git_am_opt=
  79git_format_patch_opt=
  80rebase_root=
  81force_rebase=
  82allow_rerere_autoupdate=
  83# Non-empty if a rebase was in progress when 'git rebase' was invoked
  84in_progress=
  85# One of {am, merge, interactive}
  86type=
  87# One of {"$GIT_DIR"/rebase-apply, "$GIT_DIR"/rebase-merge}
  88state_dir=
  89# One of {'', continue, skip, abort}, as parsed from command line
  90action=
  91preserve_merges=
  92autosquash=
  93keep_empty=
  94allow_empty_message=
  95test "$(git config --bool rebase.autosquash)" = "true" && autosquash=t
  96case "$(git config --bool commit.gpgsign)" in
  97true)   gpg_sign_opt=-S ;;
  98*)      gpg_sign_opt= ;;
  99esac
 100
 101read_basic_state () {
 102        test -f "$state_dir/head-name" &&
 103        test -f "$state_dir/onto" &&
 104        head_name=$(cat "$state_dir"/head-name) &&
 105        onto=$(cat "$state_dir"/onto) &&
 106        # We always write to orig-head, but interactive rebase used to write to
 107        # head. Fall back to reading from head to cover for the case that the
 108        # user upgraded git with an ongoing interactive rebase.
 109        if test -f "$state_dir"/orig-head
 110        then
 111                orig_head=$(cat "$state_dir"/orig-head)
 112        else
 113                orig_head=$(cat "$state_dir"/head)
 114        fi &&
 115        GIT_QUIET=$(cat "$state_dir"/quiet) &&
 116        test -f "$state_dir"/verbose && verbose=t
 117        test -f "$state_dir"/strategy && strategy="$(cat "$state_dir"/strategy)"
 118        test -f "$state_dir"/strategy_opts &&
 119                strategy_opts="$(cat "$state_dir"/strategy_opts)"
 120        test -f "$state_dir"/allow_rerere_autoupdate &&
 121                allow_rerere_autoupdate="$(cat "$state_dir"/allow_rerere_autoupdate)"
 122        test -f "$state_dir"/gpg_sign_opt &&
 123                gpg_sign_opt="$(cat "$state_dir"/gpg_sign_opt)"
 124}
 125
 126write_basic_state () {
 127        echo "$head_name" > "$state_dir"/head-name &&
 128        echo "$onto" > "$state_dir"/onto &&
 129        echo "$orig_head" > "$state_dir"/orig-head &&
 130        echo "$GIT_QUIET" > "$state_dir"/quiet &&
 131        test t = "$verbose" && : > "$state_dir"/verbose
 132        test -n "$strategy" && echo "$strategy" > "$state_dir"/strategy
 133        test -n "$strategy_opts" && echo "$strategy_opts" > \
 134                "$state_dir"/strategy_opts
 135        test -n "$allow_rerere_autoupdate" && echo "$allow_rerere_autoupdate" > \
 136                "$state_dir"/allow_rerere_autoupdate
 137        test -n "$gpg_sign_opt" && echo "$gpg_sign_opt" > "$state_dir"/gpg_sign_opt
 138}
 139
 140output () {
 141        case "$verbose" in
 142        '')
 143                output=$("$@" 2>&1 )
 144                status=$?
 145                test $status != 0 && printf "%s\n" "$output"
 146                return $status
 147                ;;
 148        *)
 149                "$@"
 150                ;;
 151        esac
 152}
 153
 154move_to_original_branch () {
 155        case "$head_name" in
 156        refs/*)
 157                message="rebase finished: $head_name onto $onto"
 158                git update-ref -m "$message" \
 159                        $head_name $(git rev-parse HEAD) $orig_head &&
 160                git symbolic-ref \
 161                        -m "rebase finished: returning to $head_name" \
 162                        HEAD $head_name ||
 163                die "$(eval_gettext "Could not move back to \$head_name")"
 164                ;;
 165        esac
 166}
 167
 168apply_autostash () {
 169        if test -f "$state_dir/autostash"
 170        then
 171                stash_sha1=$(cat "$state_dir/autostash")
 172                if git stash apply $stash_sha1 >/dev/null 2>&1
 173                then
 174                        echo "$(gettext 'Applied autostash.')" >&2
 175                else
 176                        git stash store -m "autostash" -q $stash_sha1 ||
 177                        die "$(eval_gettext "Cannot store \$stash_sha1")"
 178                        gettext 'Applying autostash resulted in conflicts.
 179Your changes are safe in the stash.
 180You can run "git stash pop" or "git stash drop" at any time.
 181' >&2
 182                fi
 183        fi
 184}
 185
 186finish_rebase () {
 187        rm -f "$(git rev-parse --git-path REBASE_HEAD)"
 188        apply_autostash &&
 189        { git gc --auto || true; } &&
 190        rm -rf "$state_dir"
 191}
 192
 193run_specific_rebase () {
 194        if [ "$interactive_rebase" = implied ]; then
 195                GIT_EDITOR=:
 196                export GIT_EDITOR
 197                autosquash=
 198        fi
 199        . git-rebase--$type
 200        git_rebase__$type${preserve_merges:+__preserve_merges}
 201        ret=$?
 202        if test $ret -eq 0
 203        then
 204                finish_rebase
 205        elif test $ret -eq 2 # special exit status for rebase -i
 206        then
 207                apply_autostash &&
 208                rm -rf "$state_dir" &&
 209                die "Nothing to do"
 210        fi
 211        exit $ret
 212}
 213
 214run_pre_rebase_hook () {
 215        if test -z "$ok_to_skip_pre_rebase" &&
 216           test -x "$(git rev-parse --git-path hooks/pre-rebase)"
 217        then
 218                "$(git rev-parse --git-path hooks/pre-rebase)" ${1+"$@"} ||
 219                die "$(gettext "The pre-rebase hook refused to rebase.")"
 220        fi
 221}
 222
 223test -f "$apply_dir"/applying &&
 224        die "$(gettext "It looks like 'git am' is in progress. Cannot rebase.")"
 225
 226if test -d "$apply_dir"
 227then
 228        type=am
 229        state_dir="$apply_dir"
 230elif test -d "$merge_dir"
 231then
 232        if test -f "$merge_dir"/interactive
 233        then
 234                type=interactive
 235                interactive_rebase=explicit
 236        else
 237                type=merge
 238        fi
 239        state_dir="$merge_dir"
 240fi
 241test -n "$type" && in_progress=t
 242
 243total_argc=$#
 244while test $# != 0
 245do
 246        case "$1" in
 247        --no-verify)
 248                ok_to_skip_pre_rebase=yes
 249                ;;
 250        --verify)
 251                ok_to_skip_pre_rebase=
 252                ;;
 253        --continue|--skip|--abort|--quit|--edit-todo|--show-current-patch)
 254                test $total_argc -eq 2 || usage
 255                action=${1##--}
 256                ;;
 257        --onto=*)
 258                onto="${1#--onto=}"
 259                ;;
 260        --exec=*)
 261                cmd="${cmd}exec ${1#--exec=}${LF}"
 262                test -z "$interactive_rebase" && interactive_rebase=implied
 263                ;;
 264        --interactive)
 265                interactive_rebase=explicit
 266                ;;
 267        --keep-empty)
 268                keep_empty=yes
 269                ;;
 270        --allow-empty-message)
 271                allow_empty_message=--allow-empty-message
 272                ;;
 273        --preserve-merges)
 274                preserve_merges=t
 275                test -z "$interactive_rebase" && interactive_rebase=implied
 276                ;;
 277        --autosquash)
 278                autosquash=t
 279                ;;
 280        --no-autosquash)
 281                autosquash=
 282                ;;
 283        --fork-point)
 284                fork_point=t
 285                ;;
 286        --no-fork-point)
 287                fork_point=
 288                ;;
 289        --merge)
 290                do_merge=t
 291                ;;
 292        --strategy-option=*)
 293                strategy_opts="$strategy_opts $(git rev-parse --sq-quote "--${1#--strategy-option=}")"
 294                do_merge=t
 295                test -z "$strategy" && strategy=recursive
 296                ;;
 297        --strategy=*)
 298                strategy="${1#--strategy=}"
 299                do_merge=t
 300                ;;
 301        --no-stat)
 302                diffstat=
 303                ;;
 304        --stat)
 305                diffstat=t
 306                ;;
 307        --autostash)
 308                autostash=true
 309                ;;
 310        --no-autostash)
 311                autostash=false
 312                ;;
 313        --verbose)
 314                verbose=t
 315                diffstat=t
 316                GIT_QUIET=
 317                ;;
 318        --quiet)
 319                GIT_QUIET=t
 320                git_am_opt="$git_am_opt -q"
 321                verbose=
 322                diffstat=
 323                ;;
 324        --whitespace=*)
 325                git_am_opt="$git_am_opt --whitespace=${1#--whitespace=}"
 326                case "${1#--whitespace=}" in
 327                fix|strip)
 328                        force_rebase=t
 329                        ;;
 330                esac
 331                ;;
 332        --ignore-whitespace)
 333                git_am_opt="$git_am_opt $1"
 334                ;;
 335        --committer-date-is-author-date|--ignore-date|--signoff|--no-signoff)
 336                git_am_opt="$git_am_opt $1"
 337                force_rebase=t
 338                ;;
 339        -C*)
 340                git_am_opt="$git_am_opt $1"
 341                ;;
 342        --root)
 343                rebase_root=t
 344                ;;
 345        --force-rebase|--no-ff)
 346                force_rebase=t
 347                ;;
 348        --rerere-autoupdate|--no-rerere-autoupdate)
 349                allow_rerere_autoupdate="$1"
 350                ;;
 351        --gpg-sign)
 352                gpg_sign_opt=-S
 353                ;;
 354        --gpg-sign=*)
 355                gpg_sign_opt="-S${1#--gpg-sign=}"
 356                ;;
 357        --)
 358                shift
 359                break
 360                ;;
 361        *)
 362                usage
 363                ;;
 364        esac
 365        shift
 366done
 367test $# -gt 2 && usage
 368
 369if test -n "$action"
 370then
 371        test -z "$in_progress" && die "$(gettext "No rebase in progress?")"
 372        # Only interactive rebase uses detailed reflog messages
 373        if test "$type" = interactive && test "$GIT_REFLOG_ACTION" = rebase
 374        then
 375                GIT_REFLOG_ACTION="rebase -i ($action)"
 376                export GIT_REFLOG_ACTION
 377        fi
 378fi
 379
 380if test "$action" = "edit-todo" && test "$type" != "interactive"
 381then
 382        die "$(gettext "The --edit-todo action can only be used during interactive rebase.")"
 383fi
 384
 385case "$action" in
 386continue)
 387        # Sanity check
 388        git rev-parse --verify HEAD >/dev/null ||
 389                die "$(gettext "Cannot read HEAD")"
 390        git update-index --ignore-submodules --refresh &&
 391        git diff-files --quiet --ignore-submodules || {
 392                echo "$(gettext "You must edit all merge conflicts and then
 393mark them as resolved using git add")"
 394                exit 1
 395        }
 396        read_basic_state
 397        run_specific_rebase
 398        ;;
 399skip)
 400        output git reset --hard HEAD || exit $?
 401        read_basic_state
 402        run_specific_rebase
 403        ;;
 404abort)
 405        git rerere clear
 406        read_basic_state
 407        case "$head_name" in
 408        refs/*)
 409                git symbolic-ref -m "rebase: aborting" HEAD $head_name ||
 410                die "$(eval_gettext "Could not move back to \$head_name")"
 411                ;;
 412        esac
 413        output git reset --hard $orig_head
 414        finish_rebase
 415        exit
 416        ;;
 417quit)
 418        exec rm -rf "$state_dir"
 419        ;;
 420edit-todo)
 421        run_specific_rebase
 422        ;;
 423show-current-patch)
 424        run_specific_rebase
 425        die "BUG: run_specific_rebase is not supposed to return here"
 426        ;;
 427esac
 428
 429# Make sure no rebase is in progress
 430if test -n "$in_progress"
 431then
 432        state_dir_base=${state_dir##*/}
 433        cmd_live_rebase="git rebase (--continue | --abort | --skip)"
 434        cmd_clear_stale_rebase="rm -fr \"$state_dir\""
 435        die "
 436$(eval_gettext 'It seems that there is already a $state_dir_base directory, and
 437I wonder if you are in the middle of another rebase.  If that is the
 438case, please try
 439        $cmd_live_rebase
 440If that is not the case, please
 441        $cmd_clear_stale_rebase
 442and run me again.  I am stopping in case you still have something
 443valuable there.')"
 444fi
 445
 446if test -n "$rebase_root" && test -z "$onto"
 447then
 448        test -z "$interactive_rebase" && interactive_rebase=implied
 449fi
 450
 451if test -n "$interactive_rebase"
 452then
 453        type=interactive
 454        state_dir="$merge_dir"
 455elif test -n "$do_merge"
 456then
 457        type=merge
 458        state_dir="$merge_dir"
 459else
 460        type=am
 461        state_dir="$apply_dir"
 462fi
 463
 464if test -t 2 && test -z "$GIT_QUIET"
 465then
 466        git_format_patch_opt="$git_format_patch_opt --progress"
 467fi
 468
 469if test -z "$rebase_root"
 470then
 471        case "$#" in
 472        0)
 473                if ! upstream_name=$(git rev-parse --symbolic-full-name \
 474                        --verify -q @{upstream} 2>/dev/null)
 475                then
 476                        . git-parse-remote
 477                        error_on_missing_default_upstream "rebase" "rebase" \
 478                                "against" "git rebase $(gettext '<branch>')"
 479                fi
 480
 481                test "$fork_point" = auto && fork_point=t
 482                ;;
 483        *)      upstream_name="$1"
 484                if test "$upstream_name" = "-"
 485                then
 486                        upstream_name="@{-1}"
 487                fi
 488                shift
 489                ;;
 490        esac
 491        upstream=$(peel_committish "${upstream_name}") ||
 492        die "$(eval_gettext "invalid upstream '\$upstream_name'")"
 493        upstream_arg="$upstream_name"
 494else
 495        if test -z "$onto"
 496        then
 497                empty_tree=$(git hash-object -t tree /dev/null)
 498                onto=$(git commit-tree $empty_tree </dev/null)
 499                squash_onto="$onto"
 500        fi
 501        unset upstream_name
 502        unset upstream
 503        test $# -gt 1 && usage
 504        upstream_arg=--root
 505fi
 506
 507# Make sure the branch to rebase onto is valid.
 508onto_name=${onto-"$upstream_name"}
 509case "$onto_name" in
 510*...*)
 511        if      left=${onto_name%...*} right=${onto_name#*...} &&
 512                onto=$(git merge-base --all ${left:-HEAD} ${right:-HEAD})
 513        then
 514                case "$onto" in
 515                ?*"$LF"?*)
 516                        die "$(eval_gettext "\$onto_name: there are more than one merge bases")"
 517                        ;;
 518                '')
 519                        die "$(eval_gettext "\$onto_name: there is no merge base")"
 520                        ;;
 521                esac
 522        else
 523                die "$(eval_gettext "\$onto_name: there is no merge base")"
 524        fi
 525        ;;
 526*)
 527        onto=$(peel_committish "$onto_name") ||
 528        die "$(eval_gettext "Does not point to a valid commit: \$onto_name")"
 529        ;;
 530esac
 531
 532# If the branch to rebase is given, that is the branch we will rebase
 533# $branch_name -- branch/commit being rebased, or HEAD (already detached)
 534# $orig_head -- commit object name of tip of the branch before rebasing
 535# $head_name -- refs/heads/<that-branch> or "detached HEAD"
 536switch_to=
 537case "$#" in
 5381)
 539        # Is it "rebase other $branchname" or "rebase other $commit"?
 540        branch_name="$1"
 541        switch_to="$1"
 542
 543        # Is it a local branch?
 544        if git show-ref --verify --quiet -- "refs/heads/$branch_name" &&
 545           orig_head=$(git rev-parse -q --verify "refs/heads/$branch_name")
 546        then
 547                head_name="refs/heads/$branch_name"
 548        # If not is it a valid ref (branch or commit)?
 549        elif orig_head=$(git rev-parse -q --verify "$branch_name")
 550        then
 551                head_name="detached HEAD"
 552
 553        else
 554                die "$(eval_gettext "fatal: no such branch/commit '\$branch_name'")"
 555        fi
 556        ;;
 5570)
 558        # Do not need to switch branches, we are already on it.
 559        if branch_name=$(git symbolic-ref -q HEAD)
 560        then
 561                head_name=$branch_name
 562                branch_name=$(expr "z$branch_name" : 'zrefs/heads/\(.*\)')
 563        else
 564                head_name="detached HEAD"
 565                branch_name=HEAD
 566        fi
 567        orig_head=$(git rev-parse --verify HEAD) || exit
 568        ;;
 569*)
 570        die "BUG: unexpected number of arguments left to parse"
 571        ;;
 572esac
 573
 574if test "$fork_point" = t
 575then
 576        new_upstream=$(git merge-base --fork-point "$upstream_name" \
 577                        "${switch_to:-HEAD}")
 578        if test -n "$new_upstream"
 579        then
 580                restrict_revision=$new_upstream
 581        fi
 582fi
 583
 584if test "$autostash" = true && ! (require_clean_work_tree) 2>/dev/null
 585then
 586        stash_sha1=$(git stash create "autostash") ||
 587        die "$(gettext 'Cannot autostash')"
 588
 589        mkdir -p "$state_dir" &&
 590        echo $stash_sha1 >"$state_dir/autostash" &&
 591        stash_abbrev=$(git rev-parse --short $stash_sha1) &&
 592        echo "$(eval_gettext 'Created autostash: $stash_abbrev')" &&
 593        git reset --hard
 594fi
 595
 596require_clean_work_tree "rebase" "$(gettext "Please commit or stash them.")"
 597
 598# Now we are rebasing commits $upstream..$orig_head (or with --root,
 599# everything leading up to $orig_head) on top of $onto
 600
 601# Check if we are already based on $onto with linear history,
 602# but this should be done only when upstream and onto are the same
 603# and if this is not an interactive rebase.
 604mb=$(git merge-base "$onto" "$orig_head")
 605if test "$type" != interactive && test "$upstream" = "$onto" &&
 606        test "$mb" = "$onto" && test -z "$restrict_revision" &&
 607        # linear history?
 608        ! (git rev-list --parents "$onto".."$orig_head" | sane_grep " .* ") > /dev/null
 609then
 610        if test -z "$force_rebase"
 611        then
 612                # Lazily switch to the target branch if needed...
 613                test -z "$switch_to" ||
 614                GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: checkout $switch_to" \
 615                        git checkout -q "$switch_to" --
 616                if test "$branch_name" = "HEAD" &&
 617                         ! git symbolic-ref -q HEAD
 618                then
 619                        say "$(eval_gettext "HEAD is up to date.")"
 620                else
 621                        say "$(eval_gettext "Current branch \$branch_name is up to date.")"
 622                fi
 623                finish_rebase
 624                exit 0
 625        else
 626                if test "$branch_name" = "HEAD" &&
 627                         ! git symbolic-ref -q HEAD
 628                then
 629                        say "$(eval_gettext "HEAD is up to date, rebase forced.")"
 630                else
 631                        say "$(eval_gettext "Current branch \$branch_name is up to date, rebase forced.")"
 632                fi
 633        fi
 634fi
 635
 636# If a hook exists, give it a chance to interrupt
 637run_pre_rebase_hook "$upstream_arg" "$@"
 638
 639if test -n "$diffstat"
 640then
 641        if test -n "$verbose"
 642        then
 643                echo "$(eval_gettext "Changes from \$mb to \$onto:")"
 644        fi
 645        # We want color (if set), but no pager
 646        GIT_PAGER='' git diff --stat --summary "$mb" "$onto"
 647fi
 648
 649test "$type" = interactive && run_specific_rebase
 650
 651# Detach HEAD and reset the tree
 652say "$(gettext "First, rewinding head to replay your work on top of it...")"
 653
 654GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: checkout $onto_name" \
 655        git checkout -q "$onto^0" || die "could not detach HEAD"
 656git update-ref ORIG_HEAD $orig_head
 657
 658# If the $onto is a proper descendant of the tip of the branch, then
 659# we just fast-forwarded.
 660if test "$mb" = "$orig_head"
 661then
 662        say "$(eval_gettext "Fast-forwarded \$branch_name to \$onto_name.")"
 663        move_to_original_branch
 664        finish_rebase
 665        exit 0
 666fi
 667
 668if test -n "$rebase_root"
 669then
 670        revisions="$onto..$orig_head"
 671else
 672        revisions="${restrict_revision-$upstream}..$orig_head"
 673fi
 674
 675run_specific_rebase