git-am.sh

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