git-am.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005, 2006 Junio C Hamano
   4
   5 OPTIONS_KEEPDASHDASH=
   6 OPTIONS_SPEC="\
   7 git-am [options] <mbox>|<Maildir>...
   8 git-am [options] --resolved
   9 git-am [options] --skip
  10 --
  11 d,dotest=       use <dir> and not .dotest
  12 i,interactive   run interactively
  13 b,binary        pass --allo-binary-replacement to git-apply
  14 3,3way          allow fall back on 3way merging if needed
  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 C=              pass it through git-apply
  20 p=              pass it through git-apply
  21 resolvemsg=     override error message when patch failure occurs
  22 r,resolved      to be used after a patch failure
  23 skip            skip the current patch"
  24
  25 . git-sh-setup
  26 set_reflog_action am
  27 require_work_tree
  28
  29 git var GIT_COMMITTER_IDENT >/dev/null || exit
  30
  31 stop_here () {
  32     echo "$1" >"$dotest/next"
  33     exit 1
  34 }
  35
  36 stop_here_user_resolve () {
  37     if [ -n "$resolvemsg" ]; then
  38             printf '%s\n' "$resolvemsg"
  39             stop_here $1
  40     fi
  41     cmdline=$(basename $0)
  42     if test '' != "$interactive"
  43     then
  44         cmdline="$cmdline -i"
  45     fi
  46     if test '' != "$threeway"
  47     then
  48         cmdline="$cmdline -3"
  49     fi
  50     if test '.dotest' != "$dotest"
  51     then
  52         cmdline="$cmdline -d=$dotest"
  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_$his_tree='"$SUBJECT"'
 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 reread_subject () {
 121         git stripspace <"$1" | sed -e 1q
 122 }
 123
 124 prec=4
 125 dotest=.dotest sign= utf8=t keep= skip= interactive= resolved= binary=
 126 resolvemsg= resume=
 127 git_apply_opt=
 128
 129 while test $# != 0
 130 do
 131         case "$1" in
 132         -i|--interactive)
 133                 interactive=t ;;
 134         -b|--binary)
 135                 binary=t ;;
 136         -3|--3way)
 137                 threeway=t ;;
 138         -s|--signoff)
 139                 sign=t ;;
 140         -u|--utf8)
 141                 utf8=t ;; # this is now default
 142         --no-utf8)
 143                 utf8= ;;
 144         -k|--keep)
 145                 keep=t ;;
 146         -r|--resolved)
 147                 resolved=t ;;
 148         --skip)
 149                 skip=t ;;
 150         -d|--dotest)
 151                 shift; dotest=$1;;
 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         git mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" ||  {
 208                 rm -fr "$dotest"
 209                 exit 1
 210         }
 211
 212         # -b, -s, -u, -k and --whitespace flags are kept for the
 213         # resuming session after a patch failure.
 214         # -3 and -i can and must be given when resuming.
 215         echo "$binary" >"$dotest/binary"
 216         echo " $ws" >"$dotest/whitespace"
 217         echo "$sign" >"$dotest/sign"
 218         echo "$utf8" >"$dotest/utf8"
 219         echo "$keep" >"$dotest/keep"
 220         echo 1 >"$dotest/next"
 221 fi
 222
 223 case "$resolved" in
 224 '')
 225         files=$(git diff-index --cached --name-only HEAD --) || exit
 226         if [ "$files" ]; then
 227            echo "Dirty index: cannot apply patches (dirty: $files)" >&2
 228            exit 1
 229         fi
 230 esac
 231
 232 if test "$(cat "$dotest/binary")" = t
 233 then
 234         binary=--allow-binary-replacement
 235 fi
 236 if test "$(cat "$dotest/utf8")" = t
 237 then
 238         utf8=-u
 239 else
 240         utf8=-n
 241 fi
 242 if test "$(cat "$dotest/keep")" = t
 243 then
 244         keep=-k
 245 fi
 246 ws=`cat "$dotest/whitespace"`
 247 if test "$(cat "$dotest/sign")" = t
 248 then
 249         SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
 250                         s/>.*/>/
 251                         s/^/Signed-off-by: /'
 252                 `
 253 else
 254         SIGNOFF=
 255 fi
 256
 257 last=`cat "$dotest/last"`
 258 this=`cat "$dotest/next"`
 259 if test "$skip" = t
 260 then
 261         git rerere clear
 262         this=`expr "$this" + 1`
 263         resume=
 264 fi
 265
 266 if test "$this" -gt "$last"
 267 then
 268         echo Nothing to do.
 269         rm -fr "$dotest"
 270         exit
 271 fi
 272
 273 while test "$this" -le "$last"
 274 do
 275         msgnum=`printf "%0${prec}d" $this`
 276         next=`expr "$this" + 1`
 277         test -f "$dotest/$msgnum" || {
 278                 resume=
 279                 go_next
 280                 continue
 281         }
 282
 283         # If we are not resuming, parse and extract the patch information
 284         # into separate files:
 285         #  - info records the authorship and title
 286         #  - msg is the rest of commit log message
 287         #  - patch is the patch body.
 288         #
 289         # When we are resuming, these files are either already prepared
 290         # by the user, or the user can tell us to do so by --resolved flag.
 291         case "$resume" in
 292         '')
 293                 git mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
 294                         <"$dotest/$msgnum" >"$dotest/info" ||
 295                         stop_here $this
 296
 297                 # skip pine's internal folder data
 298                 grep '^Author: Mail System Internal Data$' \
 299                         <"$dotest"/info >/dev/null &&
 300                         go_next && continue
 301
 302                 test -s $dotest/patch || {
 303                         echo "Patch is empty.  Was it split wrong?"
 304                         stop_here $this
 305                 }
 306                 git stripspace < "$dotest/msg" > "$dotest/msg-clean"
 307                 ;;
 308         esac
 309
 310         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 311         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 312         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 313
 314         if test -z "$GIT_AUTHOR_EMAIL"
 315         then
 316                 echo "Patch does not have a valid e-mail address."
 317                 stop_here $this
 318         fi
 319
 320         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 321
 322         SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
 323         case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
 324
 325         case "$resume" in
 326         '')
 327             if test '' != "$SIGNOFF"
 328             then
 329                 LAST_SIGNED_OFF_BY=`
 330                     sed -ne '/^Signed-off-by: /p' \
 331                     "$dotest/msg-clean" |
 332                     tail -n 1
 333                 `
 334                 ADD_SIGNOFF=`
 335                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 336                     test '' = "$LAST_SIGNED_OFF_BY" && echo
 337                     echo "$SIGNOFF"
 338                 }`
 339             else
 340                 ADD_SIGNOFF=
 341             fi
 342             {
 343                 printf '%s\n' "$SUBJECT"
 344                 if test -s "$dotest/msg-clean"
 345                 then
 346                         echo
 347                         cat "$dotest/msg-clean"
 348                 fi
 349                 if test '' != "$ADD_SIGNOFF"
 350                 then
 351                         echo "$ADD_SIGNOFF"
 352                 fi
 353             } >"$dotest/final-commit"
 354             ;;
 355         *)
 356                 case "$resolved$interactive" in
 357                 tt)
 358                         # This is used only for interactive view option.
 359                         git diff-index -p --cached HEAD -- >"$dotest/patch"
 360                         ;;
 361                 esac
 362         esac
 363
 364         resume=
 365         if test "$interactive" = t
 366         then
 367             test -t 0 ||
 368             die "cannot be interactive without stdin connected to a terminal."
 369             action=again
 370             while test "$action" = again
 371             do
 372                 echo "Commit Body is:"
 373                 echo "--------------------------"
 374                 cat "$dotest/final-commit"
 375                 echo "--------------------------"
 376                 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
 377                 read reply
 378                 case "$reply" in
 379                 [yY]*) action=yes ;;
 380                 [aA]*) action=yes interactive= ;;
 381                 [nN]*) action=skip ;;
 382                 [eE]*) git_editor "$dotest/final-commit"
 383                        SUBJECT=$(reread_subject "$dotest/final-commit")
 384                        action=again ;;
 385                 [vV]*) action=again
 386                        LESS=-S ${PAGER:-less} "$dotest/patch" ;;
 387                 *)     action=again ;;
 388                 esac
 389             done
 390         else
 391             action=yes
 392         fi
 393
 394         if test $action = skip
 395         then
 396                 go_next
 397                 continue
 398         fi
 399
 400         if test -x "$GIT_DIR"/hooks/applypatch-msg
 401         then
 402                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 403                 stop_here $this
 404         fi
 405
 406         printf 'Applying %s\n' "$SUBJECT"
 407
 408         case "$resolved" in
 409         '')
 410                 git apply $git_apply_opt $binary --index "$dotest/patch"
 411                 apply_status=$?
 412                 ;;
 413         t)
 414                 # Resolved means the user did all the hard work, and
 415                 # we do not have to do any patch application.  Just
 416                 # trust what the user has in the index file and the
 417                 # working tree.
 418                 resolved=
 419                 git diff-index --quiet --cached HEAD -- && {
 420                         echo "No changes - did you forget to use 'git add'?"
 421                         stop_here_user_resolve $this
 422                 }
 423                 unmerged=$(git ls-files -u)
 424                 if test -n "$unmerged"
 425                 then
 426                         echo "You still have unmerged paths in your index"
 427                         echo "did you forget to use 'git add'?"
 428                         stop_here_user_resolve $this
 429                 fi
 430                 apply_status=0
 431                 git rerere
 432                 ;;
 433         esac
 434
 435         if test $apply_status = 1 && test "$threeway" = t
 436         then
 437                 if (fall_back_3way)
 438                 then
 439                     # Applying the patch to an earlier tree and merging the
 440                     # result may have produced the same tree as ours.
 441                     git diff-index --quiet --cached HEAD -- && {
 442                         echo No changes -- Patch already applied.
 443                         go_next
 444                         continue
 445                     }
 446                     # clear apply_status -- we have successfully merged.
 447                     apply_status=0
 448                 fi
 449         fi
 450         if test $apply_status != 0
 451         then
 452                 echo Patch failed at $msgnum.
 453                 stop_here_user_resolve $this
 454         fi
 455
 456         if test -x "$GIT_DIR"/hooks/pre-applypatch
 457         then
 458                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 459         fi
 460
 461         tree=$(git write-tree) &&
 462         parent=$(git rev-parse --verify HEAD) &&
 463         commit=$(git commit-tree $tree -p $parent <"$dotest/final-commit") &&
 464         git update-ref -m "$GIT_REFLOG_ACTION: $SUBJECT" HEAD $commit $parent ||
 465         stop_here $this
 466
 467         if test -x "$GIT_DIR"/hooks/post-applypatch
 468         then
 469                 "$GIT_DIR"/hooks/post-applypatch
 470         fi
 471
 472         go_next
 473 done
 474
 475 git gc --auto
 476
 477 rm -fr "$dotest"