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