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