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