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 c,scissors      strip everything before a scissors line
  19 whitespace=     pass it through git-apply
  20 ignore-space-change pass it through git-apply
  21 ignore-whitespace pass it through git-apply
  22 directory=      pass it through git-apply
  23 C=              pass it through git-apply
  24 p=              pass it through git-apply
  25 patch-format=   format the patch(es) are in
  26 reject          pass it through git-apply
  27 resolvemsg=     override error message when patch failure occurs
  28 r,resolved      to be used after a patch failure
  29 skip            skip the current patch
  30 abort           restore the original branch and abort the patching operation.
  31 committer-date-is-author-date    lie about committer date
  32 ignore-date     use current timestamp for author date
  33 rerere-autoupdate update the index with reused conflict resolution if possible
  34 rebasing*       (internal use for git-rebase)"
  35
  36 . git-sh-setup
  37 prefix=$(git rev-parse --show-prefix)
  38 set_reflog_action am
  39 require_work_tree
  40 cd_to_toplevel
  41
  42 git var GIT_COMMITTER_IDENT >/dev/null ||
  43         die "You need to set your committer info first"
  44
  45 if git rev-parse --verify -q HEAD >/dev/null
  46 then
  47         HAS_HEAD=yes
  48 else
  49         HAS_HEAD=
  50 fi
  51
  52 sq () {
  53         git rev-parse --sq-quote "$@"
  54 }
  55
  56 stop_here () {
  57     echo "$1" >"$dotest/next"
  58     exit 1
  59 }
  60
  61 stop_here_user_resolve () {
  62     if [ -n "$resolvemsg" ]; then
  63             printf '%s\n' "$resolvemsg"
  64             stop_here $1
  65     fi
  66     cmdline="git am"
  67     if test '' != "$interactive"
  68     then
  69         cmdline="$cmdline -i"
  70     fi
  71     if test '' != "$threeway"
  72     then
  73         cmdline="$cmdline -3"
  74     fi
  75     echo "When you have resolved this problem run \"$cmdline --resolved\"."
  76     echo "If you would prefer to skip this patch, instead run \"$cmdline --skip\"."
  77     echo "To restore the original branch and stop patching run \"$cmdline --abort\"."
  78
  79     stop_here $1
  80 }
  81
  82 go_next () {
  83         rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
  84                 "$dotest/patch" "$dotest/info"
  85         echo "$next" >"$dotest/next"
  86         this=$next
  87 }
  88
  89 cannot_fallback () {
  90         echo "$1"
  91         echo "Cannot fall back to three-way merge."
  92         exit 1
  93 }
  94
  95 fall_back_3way () {
  96     O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
  97
  98     rm -fr "$dotest"/patch-merge-*
  99     mkdir "$dotest/patch-merge-tmp-dir"
 100
 101     # First see if the patch records the index info that we can use.
 102     git apply --build-fake-ancestor "$dotest/patch-merge-tmp-index" \
 103         "$dotest/patch" &&
 104     GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
 105     git write-tree >"$dotest/patch-merge-base+" ||
 106     cannot_fallback "Repository lacks necessary blobs to fall back on 3-way merge."
 107
 108     say Using index info to reconstruct a base tree...
 109     if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
 110         git apply --cached <"$dotest/patch"
 111     then
 112         mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
 113         mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
 114     else
 115         cannot_fallback "Did you hand edit your patch?
 116 It does not apply to blobs recorded in its index."
 117     fi
 118
 119     test -f "$dotest/patch-merge-index" &&
 120     his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git write-tree) &&
 121     orig_tree=$(cat "$dotest/patch-merge-base") &&
 122     rm -fr "$dotest"/patch-merge-* || exit 1
 123
 124     say Falling back to patching base and 3-way merge...
 125
 126     # This is not so wrong.  Depending on which base we picked,
 127     # orig_tree may be wildly different from ours, but his_tree
 128     # has the same set of wildly different changes in parts the
 129     # patch did not touch, so recursive ends up canceling them,
 130     # saying that we reverted all those changes.
 131
 132     eval GITHEAD_$his_tree='"$FIRSTLINE"'
 133     export GITHEAD_$his_tree
 134     if test -n "$GIT_QUIET"
 135     then
 136             export GIT_MERGE_VERBOSITY=0
 137     fi
 138     git-merge-recursive $orig_tree -- HEAD $his_tree || {
 139             git rerere $allow_rerere_autoupdate
 140             echo Failed to merge in the changes.
 141             exit 1
 142     }
 143     unset GITHEAD_$his_tree
 144 }
 145
 146 clean_abort () {
 147         test $# = 0 || echo >&2 "$@"
 148         rm -fr "$dotest"
 149         exit 1
 150 }
 151
 152 patch_format=
 153
 154 check_patch_format () {
 155         # early return if patch_format was set from the command line
 156         if test -n "$patch_format"
 157         then
 158                 return 0
 159         fi
 160
 161         # we default to mbox format if input is from stdin and for
 162         # directories
 163         if test $# = 0 || test "x$1" = "x-" || test -d "$1"
 164         then
 165                 patch_format=mbox
 166                 return 0
 167         fi
 168
 169         # otherwise, check the first few lines of the first patch to try
 170         # to detect its format
 171         {
 172                 read l1
 173                 read l2
 174                 read l3
 175                 case "$l1" in
 176                 "From "* | "From: "*)
 177                         patch_format=mbox
 178                         ;;
 179                 '# This series applies on GIT commit'*)
 180                         patch_format=stgit-series
 181                         ;;
 182                 "# HG changeset patch")
 183                         patch_format=hg
 184                         ;;
 185                 *)
 186                         # if the second line is empty and the third is
 187                         # a From, Author or Date entry, this is very
 188                         # likely an StGIT patch
 189                         case "$l2,$l3" in
 190                         ,"From: "* | ,"Author: "* | ,"Date: "*)
 191                                 patch_format=stgit
 192                                 ;;
 193                         *)
 194                                 ;;
 195                         esac
 196                         ;;
 197                 esac
 198                 if test -z "$patch_format" &&
 199                         test -n "$l1" &&
 200                         test -n "$l2" &&
 201                         test -n "$l3"
 202                 then
 203                         # This begins with three non-empty lines.  Is this a
 204                         # piece of e-mail a-la RFC2822?  Grab all the headers,
 205                         # discarding the indented remainder of folded lines,
 206                         # and see if it looks like that they all begin with the
 207                         # header field names...
 208                         tr -d '\015' <"$1" |
 209                         sed -n -e '/^$/q' -e '/^[       ]/d' -e p |
 210                         sane_egrep -v '^[!-9;-~]+:' >/dev/null ||
 211                         patch_format=mbox
 212                 fi
 213         } < "$1" || clean_abort
 214 }
 215
 216 split_patches () {
 217         case "$patch_format" in
 218         mbox)
 219                 case "$rebasing" in
 220                 '')
 221                         keep_cr= ;;
 222                 ?*)
 223                         keep_cr=--keep-cr ;;
 224                 esac
 225                 git mailsplit -d"$prec" -o"$dotest" -b $keep_cr -- "$@" > "$dotest/last" ||
 226                 clean_abort
 227                 ;;
 228         stgit-series)
 229                 if test $# -ne 1
 230                 then
 231                         clean_abort "Only one StGIT patch series can be applied at once"
 232                 fi
 233                 series_dir=`dirname "$1"`
 234                 series_file="$1"
 235                 shift
 236                 {
 237                         set x
 238                         while read filename
 239                         do
 240                                 set "$@" "$series_dir/$filename"
 241                         done
 242                         # remove the safety x
 243                         shift
 244                         # remove the arg coming from the first-line comment
 245                         shift
 246                 } < "$series_file" || clean_abort
 247                 # set the patch format appropriately
 248                 patch_format=stgit
 249                 # now handle the actual StGIT patches
 250                 split_patches "$@"
 251                 ;;
 252         stgit)
 253                 this=0
 254                 for stgit in "$@"
 255                 do
 256                         this=`expr "$this" + 1`
 257                         msgnum=`printf "%0${prec}d" $this`
 258                         # Perl version of StGIT parse_patch. The first nonemptyline
 259                         # not starting with Author, From or Date is the
 260                         # subject, and the body starts with the next nonempty
 261                         # line not starting with Author, From or Date
 262                         perl -ne 'BEGIN { $subject = 0 }
 263                                 if ($subject > 1) { print ; }
 264                                 elsif (/^\s+$/) { next ; }
 265                                 elsif (/^Author:/) { print s/Author/From/ ; }
 266                                 elsif (/^(From|Date)/) { print ; }
 267                                 elsif ($subject) {
 268                                         $subject = 2 ;
 269                                         print "\n" ;
 270                                         print ;
 271                                 } else {
 272                                         print "Subject: ", $_ ;
 273                                         $subject = 1;
 274                                 }
 275                         ' < "$stgit" > "$dotest/$msgnum" || clean_abort
 276                 done
 277                 echo "$this" > "$dotest/last"
 278                 this=
 279                 msgnum=
 280                 ;;
 281         *)
 282                 if test -n "$parse_patch" ; then
 283                         clean_abort "Patch format $patch_format is not supported."
 284                 else
 285                         clean_abort "Patch format detection failed."
 286                 fi
 287                 ;;
 288         esac
 289 }
 290
 291 prec=4
 292 dotest="$GIT_DIR/rebase-apply"
 293 sign= utf8=t keep= skip= interactive= resolved= rebasing= abort=
 294 resolvemsg= resume= scissors= no_inbody_headers=
 295 git_apply_opt=
 296 committer_date_is_author_date=
 297 ignore_date=
 298 allow_rerere_autoupdate=
 299
 300 while test $# != 0
 301 do
 302         case "$1" in
 303         -i|--interactive)
 304                 interactive=t ;;
 305         -b|--binary)
 306                 : ;;
 307         -3|--3way)
 308                 threeway=t ;;
 309         -s|--signoff)
 310                 sign=t ;;
 311         -u|--utf8)
 312                 utf8=t ;; # this is now default
 313         --no-utf8)
 314                 utf8= ;;
 315         -k|--keep)
 316                 keep=t ;;
 317         -c|--scissors)
 318                 scissors=t ;;
 319         --no-scissors)
 320                 scissors=f ;;
 321         -r|--resolved)
 322                 resolved=t ;;
 323         --skip)
 324                 skip=t ;;
 325         --abort)
 326                 abort=t ;;
 327         --rebasing)
 328                 rebasing=t threeway=t keep=t scissors=f no_inbody_headers=t ;;
 329         -d|--dotest)
 330                 die "-d option is no longer supported.  Do not use."
 331                 ;;
 332         --resolvemsg)
 333                 shift; resolvemsg=$1 ;;
 334         --whitespace|--directory)
 335                 git_apply_opt="$git_apply_opt $(sq "$1=$2")"; shift ;;
 336         -C|-p)
 337                 git_apply_opt="$git_apply_opt $(sq "$1$2")"; shift ;;
 338         --patch-format)
 339                 shift ; patch_format="$1" ;;
 340         --reject|--ignore-whitespace|--ignore-space-change)
 341                 git_apply_opt="$git_apply_opt $1" ;;
 342         --committer-date-is-author-date)
 343                 committer_date_is_author_date=t ;;
 344         --ignore-date)
 345                 ignore_date=t ;;
 346         --rerere-autoupdate|--no-rerere-autoupdate)
 347                 allow_rerere_autoupdate="$1" ;;
 348         -q|--quiet)
 349                 GIT_QUIET=t ;;
 350         --)
 351                 shift; break ;;
 352         *)
 353                 usage ;;
 354         esac
 355         shift
 356 done
 357
 358 # If the dotest directory exists, but we have finished applying all the
 359 # patches in them, clear it out.
 360 if test -d "$dotest" &&
 361    last=$(cat "$dotest/last") &&
 362    next=$(cat "$dotest/next") &&
 363    test $# != 0 &&
 364    test "$next" -gt "$last"
 365 then
 366    rm -fr "$dotest"
 367 fi
 368
 369 if test -d "$dotest"
 370 then
 371         case "$#,$skip$resolved$abort" in
 372         0,*t*)
 373                 # Explicit resume command and we do not have file, so
 374                 # we are happy.
 375                 : ;;
 376         0,)
 377                 # No file input but without resume parameters; catch
 378                 # user error to feed us a patch from standard input
 379                 # when there is already $dotest.  This is somewhat
 380                 # unreliable -- stdin could be /dev/null for example
 381                 # and the caller did not intend to feed us a patch but
 382                 # wanted to continue unattended.
 383                 test -t 0
 384                 ;;
 385         *)
 386                 false
 387                 ;;
 388         esac ||
 389         die "previous rebase directory $dotest still exists but mbox given."
 390         resume=yes
 391
 392         case "$skip,$abort" in
 393         t,t)
 394                 die "Please make up your mind. --skip or --abort?"
 395                 ;;
 396         t,)
 397                 git rerere clear
 398                 git read-tree --reset -u HEAD HEAD
 399                 orig_head=$(cat "$GIT_DIR/ORIG_HEAD")
 400                 git reset HEAD
 401                 git update-ref ORIG_HEAD $orig_head
 402                 ;;
 403         ,t)
 404                 if test -f "$dotest/rebasing"
 405                 then
 406                         exec git rebase --abort
 407                 fi
 408                 git rerere clear
 409                 test -f "$dotest/dirtyindex" || {
 410                         git read-tree --reset -u HEAD ORIG_HEAD
 411                         git reset ORIG_HEAD
 412                 }
 413                 rm -fr "$dotest"
 414                 exit ;;
 415         esac
 416         rm -f "$dotest/dirtyindex"
 417 else
 418         # Make sure we are not given --skip, --resolved, nor --abort
 419         test "$skip$resolved$abort" = "" ||
 420                 die "Resolve operation not in progress, we are not resuming."
 421
 422         # Start afresh.
 423         mkdir -p "$dotest" || exit
 424
 425         if test -n "$prefix" && test $# != 0
 426         then
 427                 first=t
 428                 for arg
 429                 do
 430                         test -n "$first" && {
 431                                 set x
 432                                 first=
 433                         }
 434                         case "$arg" in
 435                         /*)
 436                                 set "$@" "$arg" ;;
 437                         *)
 438                                 set "$@" "$prefix$arg" ;;
 439                         esac
 440                 done
 441                 shift
 442         fi
 443
 444         check_patch_format "$@"
 445
 446         split_patches "$@"
 447
 448         # -i can and must be given when resuming; everything
 449         # else is kept
 450         echo " $git_apply_opt" >"$dotest/apply-opt"
 451         echo "$threeway" >"$dotest/threeway"
 452         echo "$sign" >"$dotest/sign"
 453         echo "$utf8" >"$dotest/utf8"
 454         echo "$keep" >"$dotest/keep"
 455         echo "$scissors" >"$dotest/scissors"
 456         echo "$no_inbody_headers" >"$dotest/no_inbody_headers"
 457         echo "$GIT_QUIET" >"$dotest/quiet"
 458         echo 1 >"$dotest/next"
 459         if test -n "$rebasing"
 460         then
 461                 : >"$dotest/rebasing"
 462         else
 463                 : >"$dotest/applying"
 464                 if test -n "$HAS_HEAD"
 465                 then
 466                         git update-ref ORIG_HEAD HEAD
 467                 else
 468                         git update-ref -d ORIG_HEAD >/dev/null 2>&1
 469                 fi
 470         fi
 471 fi
 472
 473 case "$resolved" in
 474 '')
 475         case "$HAS_HEAD" in
 476         '')
 477                 files=$(git ls-files) ;;
 478         ?*)
 479                 files=$(git diff-index --cached --name-only HEAD --) ;;
 480         esac || exit
 481         if test "$files"
 482         then
 483                 test -n "$HAS_HEAD" && : >"$dotest/dirtyindex"
 484                 die "Dirty index: cannot apply patches (dirty: $files)"
 485         fi
 486 esac
 487
 488 if test "$(cat "$dotest/utf8")" = t
 489 then
 490         utf8=-u
 491 else
 492         utf8=-n
 493 fi
 494 if test "$(cat "$dotest/keep")" = t
 495 then
 496         keep=-k
 497 fi
 498 case "$(cat "$dotest/scissors")" in
 499 t)
 500         scissors=--scissors ;;
 501 f)
 502         scissors=--no-scissors ;;
 503 esac
 504 if test "$(cat "$dotest/no_inbody_headers")" = t
 505 then
 506         no_inbody_headers=--no-inbody-headers
 507 else
 508         no_inbody_headers=
 509 fi
 510 if test "$(cat "$dotest/quiet")" = t
 511 then
 512         GIT_QUIET=t
 513 fi
 514 if test "$(cat "$dotest/threeway")" = t
 515 then
 516         threeway=t
 517 fi
 518 git_apply_opt=$(cat "$dotest/apply-opt")
 519 if test "$(cat "$dotest/sign")" = t
 520 then
 521         SIGNOFF=`git var GIT_COMMITTER_IDENT | sed -e '
 522                         s/>.*/>/
 523                         s/^/Signed-off-by: /'
 524                 `
 525 else
 526         SIGNOFF=
 527 fi
 528
 529 last=`cat "$dotest/last"`
 530 this=`cat "$dotest/next"`
 531 if test "$skip" = t
 532 then
 533         this=`expr "$this" + 1`
 534         resume=
 535 fi
 536
 537 if test "$this" -gt "$last"
 538 then
 539         say Nothing to do.
 540         rm -fr "$dotest"
 541         exit
 542 fi
 543
 544 while test "$this" -le "$last"
 545 do
 546         msgnum=`printf "%0${prec}d" $this`
 547         next=`expr "$this" + 1`
 548         test -f "$dotest/$msgnum" || {
 549                 resume=
 550                 go_next
 551                 continue
 552         }
 553
 554         # If we are not resuming, parse and extract the patch information
 555         # into separate files:
 556         #  - info records the authorship and title
 557         #  - msg is the rest of commit log message
 558         #  - patch is the patch body.
 559         #
 560         # When we are resuming, these files are either already prepared
 561         # by the user, or the user can tell us to do so by --resolved flag.
 562         case "$resume" in
 563         '')
 564                 git mailinfo $keep $no_inbody_headers $scissors $utf8 "$dotest/msg" "$dotest/patch" \
 565                         <"$dotest/$msgnum" >"$dotest/info" ||
 566                         stop_here $this
 567
 568                 # skip pine's internal folder data
 569                 sane_grep '^Author: Mail System Internal Data$' \
 570                         <"$dotest"/info >/dev/null &&
 571                         go_next && continue
 572
 573                 test -s "$dotest/patch" || {
 574                         echo "Patch is empty.  Was it split wrong?"
 575                         stop_here $this
 576                 }
 577                 if test -f "$dotest/rebasing" &&
 578                         commit=$(sed -e 's/^From \([0-9a-f]*\) .*/\1/' \
 579                                 -e q "$dotest/$msgnum") &&
 580                         test "$(git cat-file -t "$commit")" = commit
 581                 then
 582                         git cat-file commit "$commit" |
 583                         sed -e '1,/^$/d' >"$dotest/msg-clean"
 584                 else
 585                         {
 586                                 sed -n '/^Subject/ s/Subject: //p' "$dotest/info"
 587                                 echo
 588                                 cat "$dotest/msg"
 589                         } |
 590                         git stripspace > "$dotest/msg-clean"
 591                 fi
 592                 ;;
 593         esac
 594
 595         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 596         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 597         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 598
 599         if test -z "$GIT_AUTHOR_EMAIL"
 600         then
 601                 echo "Patch does not have a valid e-mail address."
 602                 stop_here $this
 603         fi
 604
 605         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 606
 607         case "$resume" in
 608         '')
 609             if test '' != "$SIGNOFF"
 610             then
 611                 LAST_SIGNED_OFF_BY=`
 612                     sed -ne '/^Signed-off-by: /p' \
 613                     "$dotest/msg-clean" |
 614                     sed -ne '$p'
 615                 `
 616                 ADD_SIGNOFF=`
 617                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 618                     test '' = "$LAST_SIGNED_OFF_BY" && echo
 619                     echo "$SIGNOFF"
 620                 }`
 621             else
 622                 ADD_SIGNOFF=
 623             fi
 624             {
 625                 if test -s "$dotest/msg-clean"
 626                 then
 627                         cat "$dotest/msg-clean"
 628                 fi
 629                 if test '' != "$ADD_SIGNOFF"
 630                 then
 631                         echo "$ADD_SIGNOFF"
 632                 fi
 633             } >"$dotest/final-commit"
 634             ;;
 635         *)
 636                 case "$resolved$interactive" in
 637                 tt)
 638                         # This is used only for interactive view option.
 639                         git diff-index -p --cached HEAD -- >"$dotest/patch"
 640                         ;;
 641                 esac
 642         esac
 643
 644         resume=
 645         if test "$interactive" = t
 646         then
 647             test -t 0 ||
 648             die "cannot be interactive without stdin connected to a terminal."
 649             action=again
 650             while test "$action" = again
 651             do
 652                 echo "Commit Body is:"
 653                 echo "--------------------------"
 654                 cat "$dotest/final-commit"
 655                 echo "--------------------------"
 656                 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
 657                 read reply
 658                 case "$reply" in
 659                 [yY]*) action=yes ;;
 660                 [aA]*) action=yes interactive= ;;
 661                 [nN]*) action=skip ;;
 662                 [eE]*) git_editor "$dotest/final-commit"
 663                        action=again ;;
 664                 [vV]*) action=again
 665                        : ${GIT_PAGER=$(git var GIT_PAGER)}
 666                        : ${LESS=-FRSX}
 667                        export LESS
 668                        $GIT_PAGER "$dotest/patch" ;;
 669                 *)     action=again ;;
 670                 esac
 671             done
 672         else
 673             action=yes
 674         fi
 675         FIRSTLINE=$(sed 1q "$dotest/final-commit")
 676
 677         if test $action = skip
 678         then
 679                 go_next
 680                 continue
 681         fi
 682
 683         if test -x "$GIT_DIR"/hooks/applypatch-msg
 684         then
 685                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 686                 stop_here $this
 687         fi
 688
 689         say "Applying: $FIRSTLINE"
 690
 691         case "$resolved" in
 692         '')
 693                 # When we are allowed to fall back to 3-way later, don't give
 694                 # false errors during the initial attempt.
 695                 squelch=
 696                 if test "$threeway" = t
 697                 then
 698                         squelch='>/dev/null 2>&1 '
 699                 fi
 700                 eval "git apply $squelch$git_apply_opt"' --index "$dotest/patch"'
 701                 apply_status=$?
 702                 ;;
 703         t)
 704                 # Resolved means the user did all the hard work, and
 705                 # we do not have to do any patch application.  Just
 706                 # trust what the user has in the index file and the
 707                 # working tree.
 708                 resolved=
 709                 git diff-index --quiet --cached HEAD -- && {
 710                         echo "No changes - did you forget to use 'git add'?"
 711                         stop_here_user_resolve $this
 712                 }
 713                 unmerged=$(git ls-files -u)
 714                 if test -n "$unmerged"
 715                 then
 716                         echo "You still have unmerged paths in your index"
 717                         echo "did you forget to use 'git add'?"
 718                         stop_here_user_resolve $this
 719                 fi
 720                 apply_status=0
 721                 git rerere
 722                 ;;
 723         esac
 724
 725         if test $apply_status = 1 && test "$threeway" = t
 726         then
 727                 if (fall_back_3way)
 728                 then
 729                     # Applying the patch to an earlier tree and merging the
 730                     # result may have produced the same tree as ours.
 731                     git diff-index --quiet --cached HEAD -- && {
 732                         say No changes -- Patch already applied.
 733                         go_next
 734                         continue
 735                     }
 736                     # clear apply_status -- we have successfully merged.
 737                     apply_status=0
 738                 fi
 739         fi
 740         if test $apply_status != 0
 741         then
 742                 printf 'Patch failed at %s %s\n' "$msgnum" "$FIRSTLINE"
 743                 stop_here_user_resolve $this
 744         fi
 745
 746         if test -x "$GIT_DIR"/hooks/pre-applypatch
 747         then
 748                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 749         fi
 750
 751         tree=$(git write-tree) &&
 752         commit=$(
 753                 if test -n "$ignore_date"
 754                 then
 755                         GIT_AUTHOR_DATE=
 756                 fi
 757                 parent=$(git rev-parse --verify -q HEAD) ||
 758                 say >&2 "applying to an empty history"
 759
 760                 if test -n "$committer_date_is_author_date"
 761                 then
 762                         GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"
 763                         export GIT_COMMITTER_DATE
 764                 fi &&
 765                 git commit-tree $tree ${parent:+-p} $parent <"$dotest/final-commit"
 766         ) &&
 767         git update-ref -m "$GIT_REFLOG_ACTION: $FIRSTLINE" HEAD $commit $parent ||
 768         stop_here $this
 769
 770         if test -x "$GIT_DIR"/hooks/post-applypatch
 771         then
 772                 "$GIT_DIR"/hooks/post-applypatch
 773         fi
 774
 775         go_next
 776 done
 777
 778 git gc --auto
 779
 780 rm -fr "$dotest"