git-am.sh

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