git-am.sh

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