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
  10 git-am [options] --skip
  11 --
  12 d,dotest=       (removed -- do not use)
  13 i,interactive   run interactively
  14 b,binary        pass --allow-binary-replacement to git-apply
  15 3,3way          allow fall back on 3way merging if needed
  16 s,signoff       add a Signed-off-by line to the commit message
  17 u,utf8          recode into utf8 (default)
  18 k,keep          pass -k flag to git-mailinfo
  19 whitespace=     pass it through git-apply
  20 C=              pass it through git-apply
  21 p=              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 rebasing        (internal use for git-rebase)"
  26
  27 . git-sh-setup
  28 prefix=$(git rev-parse --show-prefix)
  29 set_reflog_action am
  30 require_work_tree
  31 cd_to_toplevel
  32
  33 git var GIT_COMMITTER_IDENT >/dev/null ||
  34         die "You need to set your committer info first"
  35
  36 stop_here () {
  37     echo "$1" >"$dotest/next"
  38     exit 1
  39 }
  40
  41 stop_here_user_resolve () {
  42     if [ -n "$resolvemsg" ]; then
  43             printf '%s\n' "$resolvemsg"
  44             stop_here $1
  45     fi
  46     cmdline=$(basename $0)
  47     if test '' != "$interactive"
  48     then
  49         cmdline="$cmdline -i"
  50     fi
  51     if test '' != "$threeway"
  52     then
  53         cmdline="$cmdline -3"
  54     fi
  55     echo "When you have resolved this problem run \"$cmdline --resolved\"."
  56     echo "If you would prefer to skip this patch, instead run \"$cmdline --skip\"."
  57
  58     stop_here $1
  59 }
  60
  61 go_next () {
  62         rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
  63                 "$dotest/patch" "$dotest/info"
  64         echo "$next" >"$dotest/next"
  65         this=$next
  66 }
  67
  68 cannot_fallback () {
  69         echo "$1"
  70         echo "Cannot fall back to three-way merge."
  71         exit 1
  72 }
  73
  74 fall_back_3way () {
  75     O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
  76
  77     rm -fr "$dotest"/patch-merge-*
  78     mkdir "$dotest/patch-merge-tmp-dir"
  79
  80     # First see if the patch records the index info that we can use.
  81     git apply --build-fake-ancestor "$dotest/patch-merge-tmp-index" \
  82         "$dotest/patch" &&
  83     GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  84     git write-tree >"$dotest/patch-merge-base+" ||
  85     cannot_fallback "Repository lacks necessary blobs to fall back on 3-way merge."
  86
  87     echo Using index info to reconstruct a base tree...
  88     if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  89         git apply $binary --cached <"$dotest/patch"
  90     then
  91         mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
  92         mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
  93     else
  94         cannot_fallback "Did you hand edit your patch?
  95 It does not apply to blobs recorded in its index."
  96     fi
  97
  98     test -f "$dotest/patch-merge-index" &&
  99     his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git write-tree) &&
 100     orig_tree=$(cat "$dotest/patch-merge-base") &&
 101     rm -fr "$dotest"/patch-merge-* || exit 1
 102
 103     echo Falling back to patching base and 3-way merge...
 104
 105     # This is not so wrong.  Depending on which base we picked,
 106     # orig_tree may be wildly different from ours, but his_tree
 107     # has the same set of wildly different changes in parts the
 108     # patch did not touch, so recursive ends up canceling them,
 109     # saying that we reverted all those changes.
 110
 111     eval GITHEAD_$his_tree='"$FIRSTLINE"'
 112     export GITHEAD_$his_tree
 113     git-merge-recursive $orig_tree -- HEAD $his_tree || {
 114             git rerere
 115             echo Failed to merge in the changes.
 116             exit 1
 117     }
 118     unset GITHEAD_$his_tree
 119 }
 120
 121 prec=4
 122 dotest=".dotest"
 123 sign= utf8=t keep= skip= interactive= resolved= binary= rebasing=
 124 resolvemsg= resume=
 125 git_apply_opt=
 126
 127 while test $# != 0
 128 do
 129         case "$1" in
 130         -i|--interactive)
 131                 interactive=t ;;
 132         -b|--binary)
 133                 binary=t ;;
 134         -3|--3way)
 135                 threeway=t ;;
 136         -s|--signoff)
 137                 sign=t ;;
 138         -u|--utf8)
 139                 utf8=t ;; # this is now default
 140         --no-utf8)
 141                 utf8= ;;
 142         -k|--keep)
 143                 keep=t ;;
 144         -r|--resolved)
 145                 resolved=t ;;
 146         --skip)
 147                 skip=t ;;
 148         --rebasing)
 149                 rebasing=t threeway=t keep=t binary=t ;;
 150         -d|--dotest)
 151                 die "-d option is no longer supported.  Do not use."
 152                 ;;
 153         --resolvemsg)
 154                 shift; resolvemsg=$1 ;;
 155         --whitespace)
 156                 git_apply_opt="$git_apply_opt $1=$2"; shift ;;
 157         -C|-p)
 158                 git_apply_opt="$git_apply_opt $1$2"; shift ;;
 159         --)
 160                 shift; break ;;
 161         *)
 162                 usage ;;
 163         esac
 164         shift
 165 done
 166
 167 # If the dotest directory exists, but we have finished applying all the
 168 # patches in them, clear it out.
 169 if test -d "$dotest" &&
 170    last=$(cat "$dotest/last") &&
 171    next=$(cat "$dotest/next") &&
 172    test $# != 0 &&
 173    test "$next" -gt "$last"
 174 then
 175    rm -fr "$dotest"
 176 fi
 177
 178 if test -d "$dotest"
 179 then
 180         case "$#,$skip$resolved" in
 181         0,*t*)
 182                 # Explicit resume command and we do not have file, so
 183                 # we are happy.
 184                 : ;;
 185         0,)
 186                 # No file input but without resume parameters; catch
 187                 # user error to feed us a patch from standard input
 188                 # when there is already $dotest.  This is somewhat
 189                 # unreliable -- stdin could be /dev/null for example
 190                 # and the caller did not intend to feed us a patch but
 191                 # wanted to continue unattended.
 192                 tty -s
 193                 ;;
 194         *)
 195                 false
 196                 ;;
 197         esac ||
 198         die "previous dotest directory $dotest still exists but mbox given."
 199         resume=yes
 200 else
 201         # Make sure we are not given --skip nor --resolved
 202         test ",$skip,$resolved," = ,,, ||
 203                 die "Resolve operation not in progress, we are not resuming."
 204
 205         # Start afresh.
 206         mkdir -p "$dotest" || exit
 207
 208         if test -n "$prefix" && test $# != 0
 209         then
 210                 first=t
 211                 for arg
 212                 do
 213                         test -n "$first" && {
 214                                 set x
 215                                 first=
 216                         }
 217                         case "$arg" in
 218                         /*)
 219                                 set "$@" "$arg" ;;
 220                         *)
 221                                 set "$@" "$prefix$arg" ;;
 222                         esac
 223                 done
 224                 shift
 225         fi
 226         git mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" ||  {
 227                 rm -fr "$dotest"
 228                 exit 1
 229         }
 230
 231         # -b, -s, -u, -k and --whitespace flags are kept for the
 232         # resuming session after a patch failure.
 233         # -3 and -i can and must be given when resuming.
 234         echo "$binary" >"$dotest/binary"
 235         echo " $ws" >"$dotest/whitespace"
 236         echo "$sign" >"$dotest/sign"
 237         echo "$utf8" >"$dotest/utf8"
 238         echo "$keep" >"$dotest/keep"
 239         echo 1 >"$dotest/next"
 240         if test -n "$rebasing"
 241         then
 242                 : >"$dotest/rebasing"
 243         else
 244                 : >"$dotest/applying"
 245         fi
 246 fi
 247
 248 case "$resolved" in
 249 '')
 250         files=$(git diff-index --cached --name-only HEAD --) || exit
 251         if [ "$files" ]; then
 252            echo "Dirty index: cannot apply patches (dirty: $files)" >&2
 253            exit 1
 254         fi
 255 esac
 256
 257 if test "$(cat "$dotest/binary")" = t
 258 then
 259         binary=--allow-binary-replacement
 260 fi
 261 if test "$(cat "$dotest/utf8")" = t
 262 then
 263         utf8=-u
 264 else
 265         utf8=-n
 266 fi
 267 if test "$(cat "$dotest/keep")" = t
 268 then
 269         keep=-k
 270 fi
 271 ws=`cat "$dotest/whitespace"`
 272 if test "$(cat "$dotest/sign")" = t
 273 then
 274         SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
 275                         s/>.*/>/
 276                         s/^/Signed-off-by: /'
 277                 `
 278 else
 279         SIGNOFF=
 280 fi
 281
 282 last=`cat "$dotest/last"`
 283 this=`cat "$dotest/next"`
 284 if test "$skip" = t
 285 then
 286         git rerere clear
 287         this=`expr "$this" + 1`
 288         resume=
 289 fi
 290
 291 if test "$this" -gt "$last"
 292 then
 293         echo Nothing to do.
 294         rm -fr "$dotest"
 295         exit
 296 fi
 297
 298 while test "$this" -le "$last"
 299 do
 300         msgnum=`printf "%0${prec}d" $this`
 301         next=`expr "$this" + 1`
 302         test -f "$dotest/$msgnum" || {
 303                 resume=
 304                 go_next
 305                 continue
 306         }
 307
 308         # If we are not resuming, parse and extract the patch information
 309         # into separate files:
 310         #  - info records the authorship and title
 311         #  - msg is the rest of commit log message
 312         #  - patch is the patch body.
 313         #
 314         # When we are resuming, these files are either already prepared
 315         # by the user, or the user can tell us to do so by --resolved flag.
 316         case "$resume" in
 317         '')
 318                 git mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
 319                         <"$dotest/$msgnum" >"$dotest/info" ||
 320                         stop_here $this
 321
 322                 # skip pine's internal folder data
 323                 grep '^Author: Mail System Internal Data$' \
 324                         <"$dotest"/info >/dev/null &&
 325                         go_next && continue
 326
 327                 test -s $dotest/patch || {
 328                         echo "Patch is empty.  Was it split wrong?"
 329                         stop_here $this
 330                 }
 331                 if test -f "$dotest/rebasing" &&
 332                         commit=$(sed -e 's/^From \([0-9a-f]*\) .*/\1/' \
 333                                 -e q "$dotest/$msgnum") &&
 334                         test "$(git cat-file -t "$commit")" = commit
 335                 then
 336                         git cat-file commit "$commit" |
 337                         sed -e '1,/^$/d' >"$dotest/msg-clean"
 338                 else
 339                         SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
 340                         case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
 341
 342                         (printf '%s\n\n' "$SUBJECT"; cat "$dotest/msg") |
 343                                 git stripspace > "$dotest/msg-clean"
 344                 fi
 345                 ;;
 346         esac
 347
 348         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 349         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 350         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 351
 352         if test -z "$GIT_AUTHOR_EMAIL"
 353         then
 354                 echo "Patch does not have a valid e-mail address."
 355                 stop_here $this
 356         fi
 357
 358         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 359
 360         case "$resume" in
 361         '')
 362             if test '' != "$SIGNOFF"
 363             then
 364                 LAST_SIGNED_OFF_BY=`
 365                     sed -ne '/^Signed-off-by: /p' \
 366                     "$dotest/msg-clean" |
 367                     sed -ne '$p'
 368                 `
 369                 ADD_SIGNOFF=`
 370                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 371                     test '' = "$LAST_SIGNED_OFF_BY" && echo
 372                     echo "$SIGNOFF"
 373                 }`
 374             else
 375                 ADD_SIGNOFF=
 376             fi
 377             {
 378                 if test -s "$dotest/msg-clean"
 379                 then
 380                         cat "$dotest/msg-clean"
 381                 fi
 382                 if test '' != "$ADD_SIGNOFF"
 383                 then
 384                         echo "$ADD_SIGNOFF"
 385                 fi
 386             } >"$dotest/final-commit"
 387             ;;
 388         *)
 389                 case "$resolved$interactive" in
 390                 tt)
 391                         # This is used only for interactive view option.
 392                         git diff-index -p --cached HEAD -- >"$dotest/patch"
 393                         ;;
 394                 esac
 395         esac
 396
 397         resume=
 398         if test "$interactive" = t
 399         then
 400             test -t 0 ||
 401             die "cannot be interactive without stdin connected to a terminal."
 402             action=again
 403             while test "$action" = again
 404             do
 405                 echo "Commit Body is:"
 406                 echo "--------------------------"
 407                 cat "$dotest/final-commit"
 408                 echo "--------------------------"
 409                 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
 410                 read reply
 411                 case "$reply" in
 412                 [yY]*) action=yes ;;
 413                 [aA]*) action=yes interactive= ;;
 414                 [nN]*) action=skip ;;
 415                 [eE]*) git_editor "$dotest/final-commit"
 416                        action=again ;;
 417                 [vV]*) action=again
 418                        LESS=-S ${PAGER:-less} "$dotest/patch" ;;
 419                 *)     action=again ;;
 420                 esac
 421             done
 422         else
 423             action=yes
 424         fi
 425         FIRSTLINE=$(sed 1q "$dotest/final-commit")
 426
 427         if test $action = skip
 428         then
 429                 go_next
 430                 continue
 431         fi
 432
 433         if test -x "$GIT_DIR"/hooks/applypatch-msg
 434         then
 435                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 436                 stop_here $this
 437         fi
 438
 439         printf 'Applying %s\n' "$FIRSTLINE"
 440
 441         case "$resolved" in
 442         '')
 443                 git apply $git_apply_opt $binary --index "$dotest/patch"
 444                 apply_status=$?
 445                 ;;
 446         t)
 447                 # Resolved means the user did all the hard work, and
 448                 # we do not have to do any patch application.  Just
 449                 # trust what the user has in the index file and the
 450                 # working tree.
 451                 resolved=
 452                 git diff-index --quiet --cached HEAD -- && {
 453                         echo "No changes - did you forget to use 'git add'?"
 454                         stop_here_user_resolve $this
 455                 }
 456                 unmerged=$(git ls-files -u)
 457                 if test -n "$unmerged"
 458                 then
 459                         echo "You still have unmerged paths in your index"
 460                         echo "did you forget to use 'git add'?"
 461                         stop_here_user_resolve $this
 462                 fi
 463                 apply_status=0
 464                 git rerere
 465                 ;;
 466         esac
 467
 468         if test $apply_status = 1 && test "$threeway" = t
 469         then
 470                 if (fall_back_3way)
 471                 then
 472                     # Applying the patch to an earlier tree and merging the
 473                     # result may have produced the same tree as ours.
 474                     git diff-index --quiet --cached HEAD -- && {
 475                         echo No changes -- Patch already applied.
 476                         go_next
 477                         continue
 478                     }
 479                     # clear apply_status -- we have successfully merged.
 480                     apply_status=0
 481                 fi
 482         fi
 483         if test $apply_status != 0
 484         then
 485                 echo Patch failed at $msgnum.
 486                 stop_here_user_resolve $this
 487         fi
 488
 489         if test -x "$GIT_DIR"/hooks/pre-applypatch
 490         then
 491                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 492         fi
 493
 494         tree=$(git write-tree) &&
 495         parent=$(git rev-parse --verify HEAD) &&
 496         commit=$(git commit-tree $tree -p $parent <"$dotest/final-commit") &&
 497         git update-ref -m "$GIT_REFLOG_ACTION: $FIRSTLINE" HEAD $commit $parent ||
 498         stop_here $this
 499
 500         if test -x "$GIT_DIR"/hooks/post-applypatch
 501         then
 502                 "$GIT_DIR"/hooks/post-applypatch
 503         fi
 504
 505         go_next
 506 done
 507
 508 git gc --auto
 509
 510 rm -fr "$dotest"