git-am.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005, 2006 Junio C Hamano
   4
   5 USAGE='[--signoff] [--dotest=<dir>] [--keep] [--utf8 | --no-utf8]
   6   [--3way] [--interactive] [--binary]
   7   [--whitespace=<option>] [-C<n>] [-p<n>]
   8   <mbox>|<Maildir>...
   9   or, when resuming [--skip | --resolved]'
  10 . git-sh-setup
  11 set_reflog_action am
  12 require_work_tree
  13
  14 git var GIT_COMMITTER_IDENT >/dev/null || exit
  15
  16 stop_here () {
  17     echo "$1" >"$dotest/next"
  18     exit 1
  19 }
  20
  21 stop_here_user_resolve () {
  22     if [ -n "$resolvemsg" ]; then
  23             printf '%s\n' "$resolvemsg"
  24             stop_here $1
  25     fi
  26     cmdline=$(basename $0)
  27     if test '' != "$interactive"
  28     then
  29         cmdline="$cmdline -i"
  30     fi
  31     if test '' != "$threeway"
  32     then
  33         cmdline="$cmdline -3"
  34     fi
  35     if test '.dotest' != "$dotest"
  36     then
  37         cmdline="$cmdline -d=$dotest"
  38     fi
  39     echo "When you have resolved this problem run \"$cmdline --resolved\"."
  40     echo "If you would prefer to skip this patch, instead run \"$cmdline --skip\"."
  41
  42     stop_here $1
  43 }
  44
  45 go_next () {
  46         rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
  47                 "$dotest/patch" "$dotest/info"
  48         echo "$next" >"$dotest/next"
  49         this=$next
  50 }
  51
  52 cannot_fallback () {
  53         echo "$1"
  54         echo "Cannot fall back to three-way merge."
  55         exit 1
  56 }
  57
  58 fall_back_3way () {
  59     O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
  60
  61     rm -fr "$dotest"/patch-merge-*
  62     mkdir "$dotest/patch-merge-tmp-dir"
  63
  64     # First see if the patch records the index info that we can use.
  65     git apply --build-fake-ancestor "$dotest/patch-merge-tmp-index" \
  66         "$dotest/patch" &&
  67     GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  68     git write-tree >"$dotest/patch-merge-base+" ||
  69     cannot_fallback "Repository lacks necessary blobs to fall back on 3-way merge."
  70
  71     echo Using index info to reconstruct a base tree...
  72     if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  73         git apply $binary --cached <"$dotest/patch"
  74     then
  75         mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
  76         mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
  77     else
  78         cannot_fallback "Did you hand edit your patch?
  79 It does not apply to blobs recorded in its index."
  80     fi
  81
  82     test -f "$dotest/patch-merge-index" &&
  83     his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git write-tree) &&
  84     orig_tree=$(cat "$dotest/patch-merge-base") &&
  85     rm -fr "$dotest"/patch-merge-* || exit 1
  86
  87     echo Falling back to patching base and 3-way merge...
  88
  89     # This is not so wrong.  Depending on which base we picked,
  90     # orig_tree may be wildly different from ours, but his_tree
  91     # has the same set of wildly different changes in parts the
  92     # patch did not touch, so recursive ends up canceling them,
  93     # saying that we reverted all those changes.
  94
  95     eval GITHEAD_$his_tree='"$SUBJECT"'
  96     export GITHEAD_$his_tree
  97     git-merge-recursive $orig_tree -- HEAD $his_tree || {
  98             git rerere
  99             echo Failed to merge in the changes.
 100             exit 1
 101     }
 102     unset GITHEAD_$his_tree
 103 }
 104
 105 reread_subject () {
 106         git stripspace <"$1" | sed -e 1q
 107 }
 108
 109 prec=4
 110 dotest=.dotest sign= utf8=t keep= skip= interactive= resolved= binary=
 111 resolvemsg= resume=
 112 git_apply_opt=
 113
 114 while test $# != 0
 115 do
 116         case "$1" in
 117         -d=*|--d=*|--do=*|--dot=*|--dote=*|--dotes=*|--dotest=*)
 118         dotest=`expr "z$1" : 'z-[^=]*=\(.*\)'`; shift ;;
 119         -d|--d|--do|--dot|--dote|--dotes|--dotest)
 120         case "$#" in 1) usage ;; esac; shift
 121         dotest="$1"; shift;;
 122
 123         -i|--i|--in|--int|--inte|--inter|--intera|--interac|--interact|\
 124         --interacti|--interactiv|--interactive)
 125         interactive=t; shift ;;
 126
 127         -b|--b|--bi|--bin|--bina|--binar|--binary)
 128         binary=t; shift ;;
 129
 130         -3|--3|--3w|--3wa|--3way)
 131         threeway=t; shift ;;
 132         -s|--s|--si|--sig|--sign|--signo|--signof|--signoff)
 133         sign=t; shift ;;
 134         -u|--u|--ut|--utf|--utf8)
 135         utf8=t; shift ;; # this is now default
 136         --no-u|--no-ut|--no-utf|--no-utf8)
 137         utf8=; shift ;;
 138         -k|--k|--ke|--kee|--keep)
 139         keep=t; shift ;;
 140
 141         -r|--r|--re|--res|--reso|--resol|--resolv|--resolve|--resolved)
 142         resolved=t; shift ;;
 143
 144         --sk|--ski|--skip)
 145         skip=t; shift ;;
 146
 147         --whitespace=*|-C*|-p*)
 148         git_apply_opt="$git_apply_opt $1"; shift ;;
 149
 150         --resolvemsg=*)
 151         resolvemsg=${1#--resolvemsg=}; shift ;;
 152
 153         --)
 154         shift; break ;;
 155         -*)
 156         usage ;;
 157         *)
 158         break ;;
 159         esac
 160 done
 161
 162 # If the dotest directory exists, but we have finished applying all the
 163 # patches in them, clear it out.
 164 if test -d "$dotest" &&
 165    last=$(cat "$dotest/last") &&
 166    next=$(cat "$dotest/next") &&
 167    test $# != 0 &&
 168    test "$next" -gt "$last"
 169 then
 170    rm -fr "$dotest"
 171 fi
 172
 173 if test -d "$dotest"
 174 then
 175         case "$#,$skip$resolved" in
 176         0,*t*)
 177                 # Explicit resume command and we do not have file, so
 178                 # we are happy.
 179                 : ;;
 180         0,)
 181                 # No file input but without resume parameters; catch
 182                 # user error to feed us a patch from standard input
 183                 # when there is already .dotest.  This is somewhat
 184                 # unreliable -- stdin could be /dev/null for example
 185                 # and the caller did not intend to feed us a patch but
 186                 # wanted to continue unattended.
 187                 tty -s
 188                 ;;
 189         *)
 190                 false
 191                 ;;
 192         esac ||
 193         die "previous dotest directory $dotest still exists but mbox given."
 194         resume=yes
 195 else
 196         # Make sure we are not given --skip nor --resolved
 197         test ",$skip,$resolved," = ,,, ||
 198                 die "Resolve operation not in progress, we are not resuming."
 199
 200         # Start afresh.
 201         mkdir -p "$dotest" || exit
 202
 203         git mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" ||  {
 204                 rm -fr "$dotest"
 205                 exit 1
 206         }
 207
 208         # -b, -s, -u, -k and --whitespace flags are kept for the
 209         # resuming session after a patch failure.
 210         # -3 and -i can and must be given when resuming.
 211         echo "$binary" >"$dotest/binary"
 212         echo " $ws" >"$dotest/whitespace"
 213         echo "$sign" >"$dotest/sign"
 214         echo "$utf8" >"$dotest/utf8"
 215         echo "$keep" >"$dotest/keep"
 216         echo 1 >"$dotest/next"
 217 fi
 218
 219 case "$resolved" in
 220 '')
 221         files=$(git diff-index --cached --name-only HEAD --) || exit
 222         if [ "$files" ]; then
 223            echo "Dirty index: cannot apply patches (dirty: $files)" >&2
 224            exit 1
 225         fi
 226 esac
 227
 228 if test "$(cat "$dotest/binary")" = t
 229 then
 230         binary=--allow-binary-replacement
 231 fi
 232 if test "$(cat "$dotest/utf8")" = t
 233 then
 234         utf8=-u
 235 else
 236         utf8=-n
 237 fi
 238 if test "$(cat "$dotest/keep")" = t
 239 then
 240         keep=-k
 241 fi
 242 ws=`cat "$dotest/whitespace"`
 243 if test "$(cat "$dotest/sign")" = t
 244 then
 245         SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
 246                         s/>.*/>/
 247                         s/^/Signed-off-by: /'
 248                 `
 249 else
 250         SIGNOFF=
 251 fi
 252
 253 last=`cat "$dotest/last"`
 254 this=`cat "$dotest/next"`
 255 if test "$skip" = t
 256 then
 257         git rerere clear
 258         this=`expr "$this" + 1`
 259         resume=
 260 fi
 261
 262 if test "$this" -gt "$last"
 263 then
 264         echo Nothing to do.
 265         rm -fr "$dotest"
 266         exit
 267 fi
 268
 269 while test "$this" -le "$last"
 270 do
 271         msgnum=`printf "%0${prec}d" $this`
 272         next=`expr "$this" + 1`
 273         test -f "$dotest/$msgnum" || {
 274                 resume=
 275                 go_next
 276                 continue
 277         }
 278
 279         # If we are not resuming, parse and extract the patch information
 280         # into separate files:
 281         #  - info records the authorship and title
 282         #  - msg is the rest of commit log message
 283         #  - patch is the patch body.
 284         #
 285         # When we are resuming, these files are either already prepared
 286         # by the user, or the user can tell us to do so by --resolved flag.
 287         case "$resume" in
 288         '')
 289                 git mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
 290                         <"$dotest/$msgnum" >"$dotest/info" ||
 291                         stop_here $this
 292
 293                 # skip pine's internal folder data
 294                 grep '^Author: Mail System Internal Data$' \
 295                         <"$dotest"/info >/dev/null &&
 296                         go_next && continue
 297
 298                 test -s $dotest/patch || {
 299                         echo "Patch is empty.  Was it split wrong?"
 300                         stop_here $this
 301                 }
 302                 git stripspace < "$dotest/msg" > "$dotest/msg-clean"
 303                 ;;
 304         esac
 305
 306         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 307         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 308         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 309
 310         if test -z "$GIT_AUTHOR_EMAIL"
 311         then
 312                 echo "Patch does not have a valid e-mail address."
 313                 stop_here $this
 314         fi
 315
 316         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 317
 318         SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
 319         case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
 320
 321         case "$resume" in
 322         '')
 323             if test '' != "$SIGNOFF"
 324             then
 325                 LAST_SIGNED_OFF_BY=`
 326                     sed -ne '/^Signed-off-by: /p' \
 327                     "$dotest/msg-clean" |
 328                     tail -n 1
 329                 `
 330                 ADD_SIGNOFF=`
 331                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 332                     test '' = "$LAST_SIGNED_OFF_BY" && echo
 333                     echo "$SIGNOFF"
 334                 }`
 335             else
 336                 ADD_SIGNOFF=
 337             fi
 338             {
 339                 printf '%s\n' "$SUBJECT"
 340                 if test -s "$dotest/msg-clean"
 341                 then
 342                         echo
 343                         cat "$dotest/msg-clean"
 344                 fi
 345                 if test '' != "$ADD_SIGNOFF"
 346                 then
 347                         echo "$ADD_SIGNOFF"
 348                 fi
 349             } >"$dotest/final-commit"
 350             ;;
 351         *)
 352                 case "$resolved$interactive" in
 353                 tt)
 354                         # This is used only for interactive view option.
 355                         git diff-index -p --cached HEAD -- >"$dotest/patch"
 356                         ;;
 357                 esac
 358         esac
 359
 360         resume=
 361         if test "$interactive" = t
 362         then
 363             test -t 0 ||
 364             die "cannot be interactive without stdin connected to a terminal."
 365             action=again
 366             while test "$action" = again
 367             do
 368                 echo "Commit Body is:"
 369                 echo "--------------------------"
 370                 cat "$dotest/final-commit"
 371                 echo "--------------------------"
 372                 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
 373                 read reply
 374                 case "$reply" in
 375                 [yY]*) action=yes ;;
 376                 [aA]*) action=yes interactive= ;;
 377                 [nN]*) action=skip ;;
 378                 [eE]*) git_editor "$dotest/final-commit"
 379                        SUBJECT=$(reread_subject "$dotest/final-commit")
 380                        action=again ;;
 381                 [vV]*) action=again
 382                        LESS=-S ${PAGER:-less} "$dotest/patch" ;;
 383                 *)     action=again ;;
 384                 esac
 385             done
 386         else
 387             action=yes
 388         fi
 389
 390         if test $action = skip
 391         then
 392                 go_next
 393                 continue
 394         fi
 395
 396         if test -x "$GIT_DIR"/hooks/applypatch-msg
 397         then
 398                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 399                 stop_here $this
 400         fi
 401
 402         echo
 403         printf 'Applying %s\n' "$SUBJECT"
 404         echo
 405
 406         case "$resolved" in
 407         '')
 408                 git apply $git_apply_opt $binary --index "$dotest/patch"
 409                 apply_status=$?
 410                 ;;
 411         t)
 412                 # Resolved means the user did all the hard work, and
 413                 # we do not have to do any patch application.  Just
 414                 # trust what the user has in the index file and the
 415                 # working tree.
 416                 resolved=
 417                 git diff-index --quiet --cached HEAD -- && {
 418                         echo "No changes - did you forget to use 'git add'?"
 419                         stop_here_user_resolve $this
 420                 }
 421                 unmerged=$(git ls-files -u)
 422                 if test -n "$unmerged"
 423                 then
 424                         echo "You still have unmerged paths in your index"
 425                         echo "did you forget to use 'git add'?"
 426                         stop_here_user_resolve $this
 427                 fi
 428                 apply_status=0
 429                 git rerere
 430                 ;;
 431         esac
 432
 433         if test $apply_status = 1 && test "$threeway" = t
 434         then
 435                 if (fall_back_3way)
 436                 then
 437                     # Applying the patch to an earlier tree and merging the
 438                     # result may have produced the same tree as ours.
 439                     git diff-index --quiet --cached HEAD -- && {
 440                         echo No changes -- Patch already applied.
 441                         go_next
 442                         continue
 443                     }
 444                     # clear apply_status -- we have successfully merged.
 445                     apply_status=0
 446                 fi
 447         fi
 448         if test $apply_status != 0
 449         then
 450                 echo Patch failed at $msgnum.
 451                 stop_here_user_resolve $this
 452         fi
 453
 454         if test -x "$GIT_DIR"/hooks/pre-applypatch
 455         then
 456                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 457         fi
 458
 459         tree=$(git write-tree) &&
 460         echo Wrote tree $tree &&
 461         parent=$(git rev-parse --verify HEAD) &&
 462         commit=$(git commit-tree $tree -p $parent <"$dotest/final-commit") &&
 463         echo Committed: $commit &&
 464         git update-ref -m "$GIT_REFLOG_ACTION: $SUBJECT" HEAD $commit $parent ||
 465         stop_here $this
 466
 467         if test -x "$GIT_DIR"/hooks/post-applypatch
 468         then
 469                 "$GIT_DIR"/hooks/post-applypatch
 470         fi
 471
 472         go_next
 473 done
 474
 475 rm -fr "$dotest"