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