git-am.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005, 2006 Junio C Hamano
   4
   5 SUBDIRECTORY_OK=Yes
   6 OPTIONS_KEEPDASHDASH=
   7 OPTIONS_SPEC="\
   8 git am [options] [<mbox>|<Maildir>...]
   9 git am [options] (--resolved | --skip | --abort)
  10 --
  11 i,interactive   run interactively
  12 b,binary*       (historical option -- no-op)
  13 3,3way          allow fall back on 3way merging if needed
  14 q,quiet         be quiet
  15 s,signoff       add a Signed-off-by line to the commit message
  16 u,utf8          recode into utf8 (default)
  17 k,keep          pass -k flag to git-mailinfo
  18 whitespace=     pass it through git-apply
  19 directory=      pass it through git-apply
  20 C=              pass it through git-apply
  21 p=              pass it through git-apply
  22 patch-format=   format the patch(es) are in
  23 reject          pass it through git-apply
  24 resolvemsg=     override error message when patch failure occurs
  25 r,resolved      to be used after a patch failure
  26 skip            skip the current patch
  27 abort           restore the original branch and abort the patching operation.
  28 committer-date-is-author-date    lie about committer date
  29 ignore-date     use current timestamp for author date
  30 rebasing*       (internal use for git-rebase)"
  31
  32 . git-sh-setup
  33 prefix=$(git rev-parse --show-prefix)
  34 set_reflog_action am
  35 require_work_tree
  36 cd_to_toplevel
  37
  38 git var GIT_COMMITTER_IDENT >/dev/null ||
  39         die "You need to set your committer info first"
  40
  41 if git rev-parse --verify -q HEAD >/dev/null
  42 then
  43         HAS_HEAD=yes
  44 else
  45         HAS_HEAD=
  46 fi
  47
  48 sq () {
  49         git rev-parse --sq-quote "$@"
  50 }
  51
  52 stop_here () {
  53     echo "$1" >"$dotest/next"
  54     exit 1
  55 }
  56
  57 stop_here_user_resolve () {
  58     if [ -n "$resolvemsg" ]; then
  59             printf '%s\n' "$resolvemsg"
  60             stop_here $1
  61     fi
  62     cmdline="git am"
  63     if test '' != "$interactive"
  64     then
  65         cmdline="$cmdline -i"
  66     fi
  67     if test '' != "$threeway"
  68     then
  69         cmdline="$cmdline -3"
  70     fi
  71     echo "When you have resolved this problem run \"$cmdline --resolved\"."
  72     echo "If you would prefer to skip this patch, instead run \"$cmdline --skip\"."
  73     echo "To restore the original branch and stop patching run \"$cmdline --abort\"."
  74
  75     stop_here $1
  76 }
  77
  78 go_next () {
  79         rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
  80                 "$dotest/patch" "$dotest/info"
  81         echo "$next" >"$dotest/next"
  82         this=$next
  83 }
  84
  85 cannot_fallback () {
  86         echo "$1"
  87         echo "Cannot fall back to three-way merge."
  88         exit 1
  89 }
  90
  91 fall_back_3way () {
  92     O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
  93
  94     rm -fr "$dotest"/patch-merge-*
  95     mkdir "$dotest/patch-merge-tmp-dir"
  96
  97     # First see if the patch records the index info that we can use.
  98     git apply --build-fake-ancestor "$dotest/patch-merge-tmp-index" \
  99         "$dotest/patch" &&
 100     GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
 101     git write-tree >"$dotest/patch-merge-base+" ||
 102     cannot_fallback "Repository lacks necessary blobs to fall back on 3-way merge."
 103
 104     say Using index info to reconstruct a base tree...
 105     if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
 106         git apply --cached <"$dotest/patch"
 107     then
 108         mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
 109         mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
 110     else
 111         cannot_fallback "Did you hand edit your patch?
 112 It does not apply to blobs recorded in its index."
 113     fi
 114
 115     test -f "$dotest/patch-merge-index" &&
 116     his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git write-tree) &&
 117     orig_tree=$(cat "$dotest/patch-merge-base") &&
 118     rm -fr "$dotest"/patch-merge-* || exit 1
 119
 120     say Falling back to patching base and 3-way merge...
 121
 122     # This is not so wrong.  Depending on which base we picked,
 123     # orig_tree may be wildly different from ours, but his_tree
 124     # has the same set of wildly different changes in parts the
 125     # patch did not touch, so recursive ends up canceling them,
 126     # saying that we reverted all those changes.
 127
 128     eval GITHEAD_$his_tree='"$FIRSTLINE"'
 129     export GITHEAD_$his_tree
 130     if test -n "$GIT_QUIET"
 131     then
 132             export GIT_MERGE_VERBOSITY=0
 133     fi
 134     git-merge-recursive $orig_tree -- HEAD $his_tree || {
 135             git rerere
 136             echo Failed to merge in the changes.
 137             exit 1
 138     }
 139     unset GITHEAD_$his_tree
 140 }
 141
 142 clean_abort () {
 143         test $# = 0 || echo >&2 "$@"
 144         rm -fr "$dotest"
 145         exit 1
 146 }
 147
 148 patch_format=
 149
 150 check_patch_format () {
 151         # early return if patch_format was set from the command line
 152         if test -n "$patch_format"
 153         then
 154                 return 0
 155         fi
 156
 157         # we default to mbox format if input is from stdin and for
 158         # directories
 159         if test $# = 0 || test "x$1" = "x-" || test -d "$1"
 160         then
 161                 patch_format=mbox
 162                 return 0
 163         fi
 164
 165         # otherwise, check the first few lines of the first patch to try
 166         # to detect its format
 167         {
 168                 read l1
 169                 read l2
 170                 read l3
 171                 case "$l1" in
 172                 "From "* | "From: "*)
 173                         patch_format=mbox
 174                         ;;
 175                 '# This series applies on GIT commit'*)
 176                         patch_format=stgit-series
 177                         ;;
 178                 "# HG changeset patch")
 179                         patch_format=hg
 180                         ;;
 181                 *)
 182                         # if the second line is empty and the third is
 183                         # a From, Author or Date entry, this is very
 184                         # likely an StGIT patch
 185                         case "$l2,$l3" in
 186                         ,"From: "* | ,"Author: "* | ,"Date: "*)
 187                                 patch_format=stgit
 188                                 ;;
 189                         *)
 190                                 ;;
 191                         esac
 192                         ;;
 193                 esac
 194                 if test -z "$patch_format" &&
 195                         test -n "$l1" &&
 196                         test -n "$l2" &&
 197                         test -n "$l3"
 198                 then
 199                         # This begins with three non-empty lines.  Is this a
 200                         # piece of e-mail a-la RFC2822?  Grab all the headers,
 201                         # discarding the indented remainder of folded lines,
 202                         # and see if it looks like that they all begin with the
 203                         # header field names...
 204                         sed -n -e '/^$/q' -e '/^[       ]/d' -e p "$1" |
 205                         egrep -v '^[A-Za-z]+(-[A-Za-z]+)*:' >/dev/null ||
 206                         patch_format=mbox
 207                 fi
 208         } < "$1" || clean_abort
 209 }
 210
 211 split_patches () {
 212         case "$patch_format" in
 213         mbox)
 214                 git mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" ||
 215                 clean_abort
 216                 ;;
 217         stgit-series)
 218                 if test $# -ne 1
 219                 then
 220                         clean_abort "Only one StGIT patch series can be applied at once"
 221                 fi
 222                 series_dir=`dirname "$1"`
 223                 series_file="$1"
 224                 shift
 225                 {
 226                         set x
 227                         while read filename
 228                         do
 229                                 set "$@" "$series_dir/$filename"
 230                         done
 231                         # remove the safety x
 232                         shift
 233                         # remove the arg coming from the first-line comment
 234                         shift
 235                 } < "$series_file" || clean_abort
 236                 # set the patch format appropriately
 237                 patch_format=stgit
 238                 # now handle the actual StGIT patches
 239                 split_patches "$@"
 240                 ;;
 241         stgit)
 242                 this=0
 243                 for stgit in "$@"
 244                 do
 245                         this=`expr "$this" + 1`
 246                         msgnum=`printf "%0${prec}d" $this`
 247                         # Perl version of StGIT parse_patch. The first nonemptyline
 248                         # not starting with Author, From or Date is the
 249                         # subject, and the body starts with the next nonempty
 250                         # line not starting with Author, From or Date
 251                         perl -ne 'BEGIN { $subject = 0 }
 252                                 if ($subject > 1) { print ; }
 253                                 elsif (/^\s+$/) { next ; }
 254                                 elsif (/^Author:/) { print s/Author/From/ ; }
 255                                 elsif (/^(From|Date)/) { print ; }
 256                                 elsif ($subject) {
 257                                         $subject = 2 ;
 258                                         print "\n" ;
 259                                         print ;
 260                                 } else {
 261                                         print "Subject: ", $_ ;
 262                                         $subject = 1;
 263                                 }
 264                         ' < "$stgit" > "$dotest/$msgnum" || clean_abort
 265                 done
 266                 echo "$this" > "$dotest/last"
 267                 this=
 268                 msgnum=
 269                 ;;
 270         *)
 271                 clean_abort "Patch format $patch_format is not supported."
 272                 ;;
 273         esac
 274 }
 275
 276 prec=4
 277 dotest="$GIT_DIR/rebase-apply"
 278 sign= utf8=t keep= skip= interactive= resolved= rebasing= abort=
 279 resolvemsg= resume=
 280 git_apply_opt=
 281 committer_date_is_author_date=
 282 ignore_date=
 283
 284 while test $# != 0
 285 do
 286         case "$1" in
 287         -i|--interactive)
 288                 interactive=t ;;
 289         -b|--binary)
 290                 : ;;
 291         -3|--3way)
 292                 threeway=t ;;
 293         -s|--signoff)
 294                 sign=t ;;
 295         -u|--utf8)
 296                 utf8=t ;; # this is now default
 297         --no-utf8)
 298                 utf8= ;;
 299         -k|--keep)
 300                 keep=t ;;
 301         -r|--resolved)
 302                 resolved=t ;;
 303         --skip)
 304                 skip=t ;;
 305         --abort)
 306                 abort=t ;;
 307         --rebasing)
 308                 rebasing=t threeway=t keep=t ;;
 309         -d|--dotest)
 310                 die "-d option is no longer supported.  Do not use."
 311                 ;;
 312         --resolvemsg)
 313                 shift; resolvemsg=$1 ;;
 314         --whitespace|--directory)
 315                 git_apply_opt="$git_apply_opt $(sq "$1=$2")"; shift ;;
 316         -C|-p)
 317                 git_apply_opt="$git_apply_opt $(sq "$1$2")"; shift ;;
 318         --patch-format)
 319                 shift ; patch_format="$1" ;;
 320         --reject)
 321                 git_apply_opt="$git_apply_opt $1" ;;
 322         --committer-date-is-author-date)
 323                 committer_date_is_author_date=t ;;
 324         --ignore-date)
 325                 ignore_date=t ;;
 326         -q|--quiet)
 327                 GIT_QUIET=t ;;
 328         --)
 329                 shift; break ;;
 330         *)
 331                 usage ;;
 332         esac
 333         shift
 334 done
 335
 336 # If the dotest directory exists, but we have finished applying all the
 337 # patches in them, clear it out.
 338 if test -d "$dotest" &&
 339    last=$(cat "$dotest/last") &&
 340    next=$(cat "$dotest/next") &&
 341    test $# != 0 &&
 342    test "$next" -gt "$last"
 343 then
 344    rm -fr "$dotest"
 345 fi
 346
 347 if test -d "$dotest"
 348 then
 349         case "$#,$skip$resolved$abort" in
 350         0,*t*)
 351                 # Explicit resume command and we do not have file, so
 352                 # we are happy.
 353                 : ;;
 354         0,)
 355                 # No file input but without resume parameters; catch
 356                 # user error to feed us a patch from standard input
 357                 # when there is already $dotest.  This is somewhat
 358                 # unreliable -- stdin could be /dev/null for example
 359                 # and the caller did not intend to feed us a patch but
 360                 # wanted to continue unattended.
 361                 test -t 0
 362                 ;;
 363         *)
 364                 false
 365                 ;;
 366         esac ||
 367         die "previous rebase directory $dotest still exists but mbox given."
 368         resume=yes
 369
 370         case "$skip,$abort" in
 371         t,t)
 372                 die "Please make up your mind. --skip or --abort?"
 373                 ;;
 374         t,)
 375                 git rerere clear
 376                 git read-tree --reset -u HEAD HEAD
 377                 orig_head=$(cat "$GIT_DIR/ORIG_HEAD")
 378                 git reset HEAD
 379                 git update-ref ORIG_HEAD $orig_head
 380                 ;;
 381         ,t)
 382                 if test -f "$dotest/rebasing"
 383                 then
 384                         exec git rebase --abort
 385                 fi
 386                 git rerere clear
 387                 test -f "$dotest/dirtyindex" || {
 388                         git read-tree --reset -u HEAD ORIG_HEAD
 389                         git reset ORIG_HEAD
 390                 }
 391                 rm -fr "$dotest"
 392                 exit ;;
 393         esac
 394         rm -f "$dotest/dirtyindex"
 395 else
 396         # Make sure we are not given --skip, --resolved, nor --abort
 397         test "$skip$resolved$abort" = "" ||
 398                 die "Resolve operation not in progress, we are not resuming."
 399
 400         # Start afresh.
 401         mkdir -p "$dotest" || exit
 402
 403         if test -n "$prefix" && test $# != 0
 404         then
 405                 first=t
 406                 for arg
 407                 do
 408                         test -n "$first" && {
 409                                 set x
 410                                 first=
 411                         }
 412                         case "$arg" in
 413                         /*)
 414                                 set "$@" "$arg" ;;
 415                         *)
 416                                 set "$@" "$prefix$arg" ;;
 417                         esac
 418                 done
 419                 shift
 420         fi
 421
 422         check_patch_format "$@"
 423
 424         split_patches "$@"
 425
 426         # -s, -u, -k, --whitespace, -3, -C, -q and -p flags are kept
 427         # for the resuming session after a patch failure.
 428         # -i can and must be given when resuming.
 429         echo " $git_apply_opt" >"$dotest/apply-opt"
 430         echo "$threeway" >"$dotest/threeway"
 431         echo "$sign" >"$dotest/sign"
 432         echo "$utf8" >"$dotest/utf8"
 433         echo "$keep" >"$dotest/keep"
 434         echo "$GIT_QUIET" >"$dotest/quiet"
 435         echo 1 >"$dotest/next"
 436         if test -n "$rebasing"
 437         then
 438                 : >"$dotest/rebasing"
 439         else
 440                 : >"$dotest/applying"
 441                 if test -n "$HAS_HEAD"
 442                 then
 443                         git update-ref ORIG_HEAD HEAD
 444                 else
 445                         git update-ref -d ORIG_HEAD >/dev/null 2>&1
 446                 fi
 447         fi
 448 fi
 449
 450 case "$resolved" in
 451 '')
 452         case "$HAS_HEAD" in
 453         '')
 454                 files=$(git ls-files) ;;
 455         ?*)
 456                 files=$(git diff-index --cached --name-only HEAD --) ;;
 457         esac || exit
 458         if test "$files"
 459         then
 460                 test -n "$HAS_HEAD" && : >"$dotest/dirtyindex"
 461                 die "Dirty index: cannot apply patches (dirty: $files)"
 462         fi
 463 esac
 464
 465 if test "$(cat "$dotest/utf8")" = t
 466 then
 467         utf8=-u
 468 else
 469         utf8=-n
 470 fi
 471 if test "$(cat "$dotest/keep")" = t
 472 then
 473         keep=-k
 474 fi
 475 if test "$(cat "$dotest/quiet")" = t
 476 then
 477         GIT_QUIET=t
 478 fi
 479 if test "$(cat "$dotest/threeway")" = t
 480 then
 481         threeway=t
 482 fi
 483 git_apply_opt=$(cat "$dotest/apply-opt")
 484 if test "$(cat "$dotest/sign")" = t
 485 then
 486         SIGNOFF=`git var GIT_COMMITTER_IDENT | sed -e '
 487                         s/>.*/>/
 488                         s/^/Signed-off-by: /'
 489                 `
 490 else
 491         SIGNOFF=
 492 fi
 493
 494 last=`cat "$dotest/last"`
 495 this=`cat "$dotest/next"`
 496 if test "$skip" = t
 497 then
 498         this=`expr "$this" + 1`
 499         resume=
 500 fi
 501
 502 if test "$this" -gt "$last"
 503 then
 504         say Nothing to do.
 505         rm -fr "$dotest"
 506         exit
 507 fi
 508
 509 while test "$this" -le "$last"
 510 do
 511         msgnum=`printf "%0${prec}d" $this`
 512         next=`expr "$this" + 1`
 513         test -f "$dotest/$msgnum" || {
 514                 resume=
 515                 go_next
 516                 continue
 517         }
 518
 519         # If we are not resuming, parse and extract the patch information
 520         # into separate files:
 521         #  - info records the authorship and title
 522         #  - msg is the rest of commit log message
 523         #  - patch is the patch body.
 524         #
 525         # When we are resuming, these files are either already prepared
 526         # by the user, or the user can tell us to do so by --resolved flag.
 527         case "$resume" in
 528         '')
 529                 git mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
 530                         <"$dotest/$msgnum" >"$dotest/info" ||
 531                         stop_here $this
 532
 533                 # skip pine's internal folder data
 534                 grep '^Author: Mail System Internal Data$' \
 535                         <"$dotest"/info >/dev/null &&
 536                         go_next && continue
 537
 538                 test -s "$dotest/patch" || {
 539                         echo "Patch is empty.  Was it split wrong?"
 540                         stop_here $this
 541                 }
 542                 if test -f "$dotest/rebasing" &&
 543                         commit=$(sed -e 's/^From \([0-9a-f]*\) .*/\1/' \
 544                                 -e q "$dotest/$msgnum") &&
 545                         test "$(git cat-file -t "$commit")" = commit
 546                 then
 547                         git cat-file commit "$commit" |
 548                         sed -e '1,/^$/d' >"$dotest/msg-clean"
 549                 else
 550                         SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
 551                         case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
 552
 553                         (printf '%s\n\n' "$SUBJECT"; cat "$dotest/msg") |
 554                                 git stripspace > "$dotest/msg-clean"
 555                 fi
 556                 ;;
 557         esac
 558
 559         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 560         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 561         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 562
 563         if test -z "$GIT_AUTHOR_EMAIL"
 564         then
 565                 echo "Patch does not have a valid e-mail address."
 566                 stop_here $this
 567         fi
 568
 569         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 570
 571         case "$resume" in
 572         '')
 573             if test '' != "$SIGNOFF"
 574             then
 575                 LAST_SIGNED_OFF_BY=`
 576                     sed -ne '/^Signed-off-by: /p' \
 577                     "$dotest/msg-clean" |
 578                     sed -ne '$p'
 579                 `
 580                 ADD_SIGNOFF=`
 581                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 582                     test '' = "$LAST_SIGNED_OFF_BY" && echo
 583                     echo "$SIGNOFF"
 584                 }`
 585             else
 586                 ADD_SIGNOFF=
 587             fi
 588             {
 589                 if test -s "$dotest/msg-clean"
 590                 then
 591                         cat "$dotest/msg-clean"
 592                 fi
 593                 if test '' != "$ADD_SIGNOFF"
 594                 then
 595                         echo "$ADD_SIGNOFF"
 596                 fi
 597             } >"$dotest/final-commit"
 598             ;;
 599         *)
 600                 case "$resolved$interactive" in
 601                 tt)
 602                         # This is used only for interactive view option.
 603                         git diff-index -p --cached HEAD -- >"$dotest/patch"
 604                         ;;
 605                 esac
 606         esac
 607
 608         resume=
 609         if test "$interactive" = t
 610         then
 611             test -t 0 ||
 612             die "cannot be interactive without stdin connected to a terminal."
 613             action=again
 614             while test "$action" = again
 615             do
 616                 echo "Commit Body is:"
 617                 echo "--------------------------"
 618                 cat "$dotest/final-commit"
 619                 echo "--------------------------"
 620                 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
 621                 read reply
 622                 case "$reply" in
 623                 [yY]*) action=yes ;;
 624                 [aA]*) action=yes interactive= ;;
 625                 [nN]*) action=skip ;;
 626                 [eE]*) git_editor "$dotest/final-commit"
 627                        action=again ;;
 628                 [vV]*) action=again
 629                        LESS=-S ${PAGER:-less} "$dotest/patch" ;;
 630                 *)     action=again ;;
 631                 esac
 632             done
 633         else
 634             action=yes
 635         fi
 636         FIRSTLINE=$(sed 1q "$dotest/final-commit")
 637
 638         if test $action = skip
 639         then
 640                 go_next
 641                 continue
 642         fi
 643
 644         if test -x "$GIT_DIR"/hooks/applypatch-msg
 645         then
 646                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 647                 stop_here $this
 648         fi
 649
 650         say "Applying: $FIRSTLINE"
 651
 652         case "$resolved" in
 653         '')
 654                 # When we are allowed to fall back to 3-way later, don't give
 655                 # false errors during the initial attempt.
 656                 squelch=
 657                 if test "$threeway" = t
 658                 then
 659                         squelch='>/dev/null 2>&1 '
 660                 fi
 661                 eval "git apply $squelch$git_apply_opt"' --index "$dotest/patch"'
 662                 apply_status=$?
 663                 ;;
 664         t)
 665                 # Resolved means the user did all the hard work, and
 666                 # we do not have to do any patch application.  Just
 667                 # trust what the user has in the index file and the
 668                 # working tree.
 669                 resolved=
 670                 git diff-index --quiet --cached HEAD -- && {
 671                         echo "No changes - did you forget to use 'git add'?"
 672                         stop_here_user_resolve $this
 673                 }
 674                 unmerged=$(git ls-files -u)
 675                 if test -n "$unmerged"
 676                 then
 677                         echo "You still have unmerged paths in your index"
 678                         echo "did you forget to use 'git add'?"
 679                         stop_here_user_resolve $this
 680                 fi
 681                 apply_status=0
 682                 git rerere
 683                 ;;
 684         esac
 685
 686         if test $apply_status = 1 && test "$threeway" = t
 687         then
 688                 if (fall_back_3way)
 689                 then
 690                     # Applying the patch to an earlier tree and merging the
 691                     # result may have produced the same tree as ours.
 692                     git diff-index --quiet --cached HEAD -- && {
 693                         say No changes -- Patch already applied.
 694                         go_next
 695                         continue
 696                     }
 697                     # clear apply_status -- we have successfully merged.
 698                     apply_status=0
 699                 fi
 700         fi
 701         if test $apply_status != 0
 702         then
 703                 printf 'Patch failed at %s %s\n' "$msgnum" "$FIRSTLINE"
 704                 stop_here_user_resolve $this
 705         fi
 706
 707         if test -x "$GIT_DIR"/hooks/pre-applypatch
 708         then
 709                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 710         fi
 711
 712         tree=$(git write-tree) &&
 713         commit=$(
 714                 if test -n "$ignore_date"
 715                 then
 716                         GIT_AUTHOR_DATE=
 717                 fi
 718                 parent=$(git rev-parse --verify -q HEAD) ||
 719                 say >&2 "applying to an empty history"
 720
 721                 if test -n "$committer_date_is_author_date"
 722                 then
 723                         GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"
 724                         export GIT_COMMITTER_DATE
 725                 fi &&
 726                 git commit-tree $tree ${parent:+-p} $parent <"$dotest/final-commit"
 727         ) &&
 728         git update-ref -m "$GIT_REFLOG_ACTION: $FIRSTLINE" HEAD $commit $parent ||
 729         stop_here $this
 730
 731         if test -x "$GIT_DIR"/hooks/post-applypatch
 732         then
 733                 "$GIT_DIR"/hooks/post-applypatch
 734         fi
 735
 736         go_next
 737 done
 738
 739 git gc --auto
 740
 741 rm -fr "$dotest"