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=
 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="$1"; shift;;
 113
 114         -i|--i|--in|--int|--inte|--inter|--intera|--interac|--interact|\
 115         --interacti|--interactiv|--interactive)
 116         interactive=t; shift ;;
 117
 118         -b|--b|--bi|--bin|--bina|--binar|--binary)
 119         binary=t; shift ;;
 120
 121         -3|--3|--3w|--3wa|--3way)
 122         threeway=t; shift ;;
 123         -s|--s|--si|--sig|--sign|--signo|--signof|--signoff)
 124         sign=t; shift ;;
 125         -u|--u|--ut|--utf|--utf8)
 126         utf8=t; shift ;;
 127         -k|--k|--ke|--kee|--keep)
 128         keep=t; shift ;;
 129
 130         -r|--r|--re|--res|--reso|--resol|--resolv|--resolve|--resolved)
 131         resolved=t; shift ;;
 132
 133         --sk|--ski|--skip)
 134         skip=t; shift ;;
 135
 136         --)
 137         shift; break ;;
 138         -*)
 139         usage ;;
 140         *)
 141         break ;;
 142         esac
 143 done
 144
 145 # If the dotest directory exists, but we have finished applying all the
 146 # patches in them, clear it out.
 147 if test -d "$dotest" &&
 148    last=$(cat "$dotest/last") &&
 149    next=$(cat "$dotest/next") &&
 150    test $# != 0 &&
 151    test "$next" -gt "$last"
 152 then
 153    rm -fr "$dotest"
 154 fi
 155
 156 if test -d "$dotest"
 157 then
 158         test ",$#," = ",0," ||
 159         die "previous dotest directory $dotest still exists but mbox given."
 160         resume=yes
 161 else
 162         # Make sure we are not given --skip nor --resolved
 163         test ",$skip,$resolved," = ,,, ||
 164                 die "we are not resuming."
 165
 166         # Start afresh.
 167         mkdir -p "$dotest" || exit
 168
 169         git-mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" ||  {
 170                 rm -fr "$dotest"
 171                 exit 1
 172         }
 173
 174         # -b, -s, -u and -k flags are kept for the resuming session after
 175         # a patch failure.
 176         # -3 and -i can and must be given when resuming.
 177         echo "$binary" >"$dotest/binary"
 178         echo "$sign" >"$dotest/sign"
 179         echo "$utf8" >"$dotest/utf8"
 180         echo "$keep" >"$dotest/keep"
 181         echo 1 >"$dotest/next"
 182 fi
 183
 184 case "$resolved" in
 185 '')
 186         files=$(git-diff-index --cached --name-only HEAD) || exit
 187         if [ "$files" ]; then
 188            echo "Dirty index: cannot apply patches (dirty: $files)" >&2
 189            exit 1
 190         fi
 191 esac
 192
 193 if test "$(cat "$dotest/binary")" = t
 194 then
 195         binary=--allow-binary-replacement
 196 fi
 197 if test "$(cat "$dotest/utf8")" = t
 198 then
 199         utf8=-u
 200 fi
 201 if test "$(cat "$dotest/keep")" = t
 202 then
 203         keep=-k
 204 fi
 205 if test "$(cat "$dotest/sign")" = t
 206 then
 207         SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
 208                         s/>.*/>/
 209                         s/^/Signed-off-by: /'
 210                 `
 211 else
 212         SIGNOFF=
 213 fi
 214
 215 last=`cat "$dotest/last"`
 216 this=`cat "$dotest/next"`
 217 if test "$skip" = t
 218 then
 219         this=`expr "$this" + 1`
 220         resume=
 221 fi
 222
 223 if test "$this" -gt "$last"
 224 then
 225         echo Nothing to do.
 226         rm -fr "$dotest"
 227         exit
 228 fi
 229
 230 while test "$this" -le "$last"
 231 do
 232         msgnum=`printf "%0${prec}d" $this`
 233         next=`expr "$this" + 1`
 234         test -f "$dotest/$msgnum" || {
 235                 resume=
 236                 go_next
 237                 continue
 238         }
 239
 240         # If we are not resuming, parse and extract the patch information
 241         # into separate files:
 242         #  - info records the authorship and title
 243         #  - msg is the rest of commit log message
 244         #  - patch is the patch body.
 245         #
 246         # When we are resuming, these files are either already prepared
 247         # by the user, or the user can tell us to do so by --resolved flag.
 248         case "$resume" in
 249         '')
 250                 git-mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
 251                         <"$dotest/$msgnum" >"$dotest/info" ||
 252                         stop_here $this
 253                 git-stripspace < "$dotest/msg" > "$dotest/msg-clean"
 254                 ;;
 255         esac
 256
 257         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 258         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 259         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 260
 261         if test -z "$GIT_AUTHOR_EMAIL"
 262         then
 263                 echo "Patch does not have a valid e-mail address."
 264                 stop_here $this
 265         fi
 266
 267         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 268
 269         SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
 270         case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
 271
 272         case "$resume" in
 273         '')
 274             if test '' != "$SIGNOFF"
 275             then
 276                 LAST_SIGNED_OFF_BY=`
 277                     sed -ne '/^Signed-off-by: /p' \
 278                     "$dotest/msg-clean" |
 279                     tail -n 1
 280                 `
 281                 ADD_SIGNOFF=`
 282                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 283                     test '' = "$LAST_SIGNED_OFF_BY" && echo
 284                     echo "$SIGNOFF"
 285                 }`
 286             else
 287                 ADD_SIGNOFF=
 288             fi
 289             {
 290                 echo "$SUBJECT"
 291                 if test -s "$dotest/msg-clean"
 292                 then
 293                         echo
 294                         cat "$dotest/msg-clean"
 295                 fi
 296                 if test '' != "$ADD_SIGNOFF"
 297                 then
 298                         echo "$ADD_SIGNOFF"
 299                 fi
 300             } >"$dotest/final-commit"
 301             ;;
 302         *)
 303                 case "$resolved,$interactive" in
 304                 tt)
 305                         # This is used only for interactive view option.
 306                         git-diff-index -p --cached HEAD >"$dotest/patch"
 307                         ;;
 308                 esac
 309         esac
 310
 311         resume=
 312         if test "$interactive" = t
 313         then
 314             test -t 0 ||
 315             die "cannot be interactive without stdin connected to a terminal."
 316             action=again
 317             while test "$action" = again
 318             do
 319                 echo "Commit Body is:"
 320                 echo "--------------------------"
 321                 cat "$dotest/final-commit"
 322                 echo "--------------------------"
 323                 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
 324                 read reply
 325                 case "$reply" in
 326                 [yY]*) action=yes ;;
 327                 [aA]*) action=yes interactive= ;;
 328                 [nN]*) action=skip ;;
 329                 [eE]*) "${VISUAL:-${EDITOR:-vi}}" "$dotest/final-commit"
 330                        action=again ;;
 331                 [vV]*) action=again
 332                        LESS=-S ${PAGER:-less} "$dotest/patch" ;;
 333                 *)     action=again ;;
 334                 esac
 335             done
 336         else
 337             action=yes
 338         fi
 339
 340         if test $action = skip
 341         then
 342                 go_next
 343                 continue
 344         fi
 345
 346         if test -x "$GIT_DIR"/hooks/applypatch-msg
 347         then
 348                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 349                 stop_here $this
 350         fi
 351
 352         echo
 353         echo "Applying '$SUBJECT'"
 354         echo
 355
 356         case "$resolved" in
 357         '')
 358                 git-apply $binary --index "$dotest/patch"
 359                 apply_status=$?
 360                 ;;
 361         t)
 362                 # Resolved means the user did all the hard work, and
 363                 # we do not have to do any patch application.  Just
 364                 # trust what the user has in the index file and the
 365                 # working tree.
 366                 resolved=
 367                 apply_status=0
 368                 ;;
 369         esac
 370
 371         if test $apply_status = 1 && test "$threeway" = t
 372         then
 373                 if (fall_back_3way)
 374                 then
 375                     # Applying the patch to an earlier tree and merging the
 376                     # result may have produced the same tree as ours.
 377                     changed="$(git-diff-index --cached --name-only -z HEAD)"
 378                     if test '' = "$changed"
 379                     then
 380                             echo No changes -- Patch already applied.
 381                             go_next
 382                             continue
 383                     fi
 384                     # clear apply_status -- we have successfully merged.
 385                     apply_status=0
 386                 fi
 387         fi
 388         if test $apply_status != 0
 389         then
 390                 echo Patch failed at $msgnum.
 391                 stop_here $this
 392         fi
 393
 394         if test -x "$GIT_DIR"/hooks/pre-applypatch
 395         then
 396                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 397         fi
 398
 399         tree=$(git-write-tree) &&
 400         echo Wrote tree $tree &&
 401         parent=$(git-rev-parse --verify HEAD) &&
 402         commit=$(git-commit-tree $tree -p $parent <"$dotest/final-commit") &&
 403         echo Committed: $commit &&
 404         git-update-ref HEAD $commit $parent ||
 405         stop_here $this
 406
 407         if test -x "$GIT_DIR"/hooks/post-applypatch
 408         then
 409                 "$GIT_DIR"/hooks/post-applypatch
 410         fi
 411
 412         go_next
 413 done
 414
 415 rm -fr "$dotest"