git-am.sh

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