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 || exit
  34
  35 stop_here () {
  36     echo "$1" >"$dotest/next"
  37     exit 1
  38 }
  39
  40 stop_here_user_resolve () {
  41     if [ -n "$resolvemsg" ]; then
  42             printf '%s\n' "$resolvemsg"
  43             stop_here $1
  44     fi
  45     cmdline=$(basename $0)
  46     if test '' != "$interactive"
  47     then
  48         cmdline="$cmdline -i"
  49     fi
  50     if test '' != "$threeway"
  51     then
  52         cmdline="$cmdline -3"
  53     fi
  54     echo "When you have resolved this problem run \"$cmdline --resolved\"."
  55     echo "If you would prefer to skip this patch, instead run \"$cmdline --skip\"."
  56
  57     stop_here $1
  58 }
  59
  60 go_next () {
  61         rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
  62                 "$dotest/patch" "$dotest/info"
  63         echo "$next" >"$dotest/next"
  64         this=$next
  65 }
  66
  67 cannot_fallback () {
  68         echo "$1"
  69         echo "Cannot fall back to three-way merge."
  70         exit 1
  71 }
  72
  73 fall_back_3way () {
  74     O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
  75
  76     rm -fr "$dotest"/patch-merge-*
  77     mkdir "$dotest/patch-merge-tmp-dir"
  78
  79     # First see if the patch records the index info that we can use.
  80     git apply --build-fake-ancestor "$dotest/patch-merge-tmp-index" \
  81         "$dotest/patch" &&
  82     GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  83     git write-tree >"$dotest/patch-merge-base+" ||
  84     cannot_fallback "Repository lacks necessary blobs to fall back on 3-way merge."
  85
  86     echo Using index info to reconstruct a base tree...
  87     if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  88         git apply $binary --cached <"$dotest/patch"
  89     then
  90         mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
  91         mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
  92     else
  93         cannot_fallback "Did you hand edit your patch?
  94 It does not apply to blobs recorded in its index."
  95     fi
  96
  97     test -f "$dotest/patch-merge-index" &&
  98     his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git write-tree) &&
  99     orig_tree=$(cat "$dotest/patch-merge-base") &&
 100     rm -fr "$dotest"/patch-merge-* || exit 1
 101
 102     echo Falling back to patching base and 3-way merge...
 103
 104     # This is not so wrong.  Depending on which base we picked,
 105     # orig_tree may be wildly different from ours, but his_tree
 106     # has the same set of wildly different changes in parts the
 107     # patch did not touch, so recursive ends up canceling them,
 108     # saying that we reverted all those changes.
 109
 110     eval GITHEAD_$his_tree='"$FIRSTLINE"'
 111     export GITHEAD_$his_tree
 112     git-merge-recursive $orig_tree -- HEAD $his_tree || {
 113             git rerere
 114             echo Failed to merge in the changes.
 115             exit 1
 116     }
 117     unset GITHEAD_$his_tree
 118 }
 119
 120 prec=4
 121 dotest=".dotest"
 122 sign= utf8=t keep= skip= interactive= resolved= binary= rebasing=
 123 resolvemsg= resume=
 124 git_apply_opt=
 125
 126 while test $# != 0
 127 do
 128         case "$1" in
 129         -i|--interactive)
 130                 interactive=t ;;
 131         -b|--binary)
 132                 binary=t ;;
 133         -3|--3way)
 134                 threeway=t ;;
 135         -s|--signoff)
 136                 sign=t ;;
 137         -u|--utf8)
 138                 utf8=t ;; # this is now default
 139         --no-utf8)
 140                 utf8= ;;
 141         -k|--keep)
 142                 keep=t ;;
 143         -r|--resolved)
 144                 resolved=t ;;
 145         --skip)
 146                 skip=t ;;
 147         --rebasing)
 148                 rebasing=t threeway=t keep=t binary=t ;;
 149         -d|--dotest)
 150                 die "-d option is no longer supported.  Do not use."
 151                 ;;
 152         --resolvemsg)
 153                 shift; resolvemsg=$1 ;;
 154         --whitespace)
 155                 git_apply_opt="$git_apply_opt $1=$2"; shift ;;
 156         -C|-p)
 157                 git_apply_opt="$git_apply_opt $1$2"; shift ;;
 158         --)
 159                 shift; break ;;
 160         *)
 161                 usage ;;
 162         esac
 163         shift
 164 done
 165
 166 # If the dotest directory exists, but we have finished applying all the
 167 # patches in them, clear it out.
 168 if test -d "$dotest" &&
 169    last=$(cat "$dotest/last") &&
 170    next=$(cat "$dotest/next") &&
 171    test $# != 0 &&
 172    test "$next" -gt "$last"
 173 then
 174    rm -fr "$dotest"
 175 fi
 176
 177 if test -d "$dotest"
 178 then
 179         case "$#,$skip$resolved" in
 180         0,*t*)
 181                 # Explicit resume command and we do not have file, so
 182                 # we are happy.
 183                 : ;;
 184         0,)
 185                 # No file input but without resume parameters; catch
 186                 # user error to feed us a patch from standard input
 187                 # when there is already $dotest.  This is somewhat
 188                 # unreliable -- stdin could be /dev/null for example
 189                 # and the caller did not intend to feed us a patch but
 190                 # wanted to continue unattended.
 191                 tty -s
 192                 ;;
 193         *)
 194                 false
 195                 ;;
 196         esac ||
 197         die "previous dotest directory $dotest still exists but mbox given."
 198         resume=yes
 199 else
 200         # Make sure we are not given --skip nor --resolved
 201         test ",$skip,$resolved," = ,,, ||
 202                 die "Resolve operation not in progress, we are not resuming."
 203
 204         # Start afresh.
 205         mkdir -p "$dotest" || exit
 206
 207         if test -n "$prefix" && test $# != 0
 208         then
 209                 first=t
 210                 for arg
 211                 do
 212                         test -n "$first" && {
 213                                 set x
 214                                 first=
 215                         }
 216                         case "$arg" in
 217                         /*)
 218                                 set "$@" "$arg" ;;
 219                         *)
 220                                 set "$@" "$prefix$arg" ;;
 221                         esac
 222                 done
 223                 shift
 224         fi
 225         git mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" ||  {
 226                 rm -fr "$dotest"
 227                 exit 1
 228         }
 229
 230         # -b, -s, -u, -k and --whitespace flags are kept for the
 231         # resuming session after a patch failure.
 232         # -3 and -i can and must be given when resuming.
 233         echo "$binary" >"$dotest/binary"
 234         echo " $ws" >"$dotest/whitespace"
 235         echo "$sign" >"$dotest/sign"
 236         echo "$utf8" >"$dotest/utf8"
 237         echo "$keep" >"$dotest/keep"
 238         echo 1 >"$dotest/next"
 239         if test -n "$rebasing"
 240         then
 241                 : >"$dotest/rebasing"
 242         else
 243                 : >"$dotest/applying"
 244                 git update-ref ORIG_HEAD HEAD
 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"