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 $his_tree || {
  91             git-rerere
  92             echo Failed to merge in the changes.
  93             exit 1
  94     }
  95 }
  96
  97 prec=4
  98 dotest=.dotest sign= utf8= keep= skip= interactive= resolved= binary=
  99
 100 while case "$#" in 0) break;; esac
 101 do
 102         case "$1" in
 103         -d=*|--d=*|--do=*|--dot=*|--dote=*|--dotes=*|--dotest=*)
 104         dotest=`expr "$1" : '-[^=]*=\(.*\)'`; shift ;;
 105         -d|--d|--do|--dot|--dote|--dotes|--dotest)
 106         case "$#" in 1) usage ;; esac; shift
 107         dotest="$1"; shift;;
 108
 109         -i|--i|--in|--int|--inte|--inter|--intera|--interac|--interact|\
 110         --interacti|--interactiv|--interactive)
 111         interactive=t; shift ;;
 112
 113         -b|--b|--bi|--bin|--bina|--binar|--binary)
 114         binary=t; shift ;;
 115
 116         -3|--3|--3w|--3wa|--3way)
 117         threeway=t; shift ;;
 118         -s|--s|--si|--sig|--sign|--signo|--signof|--signoff)
 119         sign=t; shift ;;
 120         -u|--u|--ut|--utf|--utf8)
 121         utf8=t; shift ;;
 122         -k|--k|--ke|--kee|--keep)
 123         keep=t; shift ;;
 124
 125         -r|--r|--re|--res|--reso|--resol|--resolv|--resolve|--resolved)
 126         resolved=t; shift ;;
 127
 128         --sk|--ski|--skip)
 129         skip=t; shift ;;
 130
 131         --)
 132         shift; break ;;
 133         -*)
 134         usage ;;
 135         *)
 136         break ;;
 137         esac
 138 done
 139
 140 # If the dotest directory exists, but we have finished applying all the
 141 # patches in them, clear it out.
 142 if test -d "$dotest" &&
 143    last=$(cat "$dotest/last") &&
 144    next=$(cat "$dotest/next") &&
 145    test $# != 0 &&
 146    test "$next" -gt "$last"
 147 then
 148    rm -fr "$dotest"
 149 fi
 150
 151 if test -d "$dotest"
 152 then
 153         test ",$#," = ",0," ||
 154         die "previous dotest directory $dotest still exists but mbox given."
 155         resume=yes
 156 else
 157         # Make sure we are not given --skip nor --resolved
 158         test ",$skip,$resolved," = ,,, ||
 159                 die "we are not resuming."
 160
 161         # Start afresh.
 162         mkdir -p "$dotest" || exit
 163
 164         git-mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" ||  {
 165                 rm -fr "$dotest"
 166                 exit 1
 167         }
 168
 169         # -b, -s, -u and -k flags are kept for the resuming session after
 170         # a patch failure.
 171         # -3 and -i can and must be given when resuming.
 172         echo "$binary" >"$dotest/binary"
 173         echo "$sign" >"$dotest/sign"
 174         echo "$utf8" >"$dotest/utf8"
 175         echo "$keep" >"$dotest/keep"
 176         echo 1 >"$dotest/next"
 177 fi
 178
 179 case "$resolved" in
 180 '')
 181         files=$(git-diff-index --cached --name-only HEAD) || exit
 182         if [ "$files" ]; then
 183            echo "Dirty index: cannot apply patches (dirty: $files)" >&2
 184            exit 1
 185         fi
 186 esac
 187
 188 if test "$(cat "$dotest/binary")" = t
 189 then
 190         binary=--allow-binary-replacement
 191 fi
 192 if test "$(cat "$dotest/utf8")" = t
 193 then
 194         utf8=-u
 195 fi
 196 if test "$(cat "$dotest/keep")" = t
 197 then
 198         keep=-k
 199 fi
 200 if test "$(cat "$dotest/sign")" = t
 201 then
 202         SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
 203                         s/>.*/>/
 204                         s/^/Signed-off-by: /'
 205                 `
 206 else
 207         SIGNOFF=
 208 fi
 209
 210 last=`cat "$dotest/last"`
 211 this=`cat "$dotest/next"`
 212 if test "$skip" = t
 213 then
 214         this=`expr "$this" + 1`
 215         resume=
 216 fi
 217
 218 if test "$this" -gt "$last"
 219 then
 220         echo Nothing to do.
 221         rm -fr "$dotest"
 222         exit
 223 fi
 224
 225 while test "$this" -le "$last"
 226 do
 227         msgnum=`printf "%0${prec}d" $this`
 228         next=`expr "$this" + 1`
 229         test -f "$dotest/$msgnum" || {
 230                 resume=
 231                 go_next
 232                 continue
 233         }
 234
 235         # If we are not resuming, parse and extract the patch information
 236         # into separate files:
 237         #  - info records the authorship and title
 238         #  - msg is the rest of commit log message
 239         #  - patch is the patch body.
 240         #
 241         # When we are resuming, these files are either already prepared
 242         # by the user, or the user can tell us to do so by --resolved flag.
 243         case "$resume" in
 244         '')
 245                 git-mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
 246                         <"$dotest/$msgnum" >"$dotest/info" ||
 247                         stop_here $this
 248                 git-stripspace < "$dotest/msg" > "$dotest/msg-clean"
 249                 ;;
 250         esac
 251
 252         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 253         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 254         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 255
 256         if test -z "$GIT_AUTHOR_EMAIL"
 257         then
 258                 echo "Patch does not have a valid e-mail address."
 259                 stop_here $this
 260         fi
 261
 262         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 263
 264         SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
 265         case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
 266
 267         case "$resume" in
 268         '')
 269             if test '' != "$SIGNOFF"
 270             then
 271                 LAST_SIGNED_OFF_BY=`
 272                     sed -ne '/^Signed-off-by: /p' \
 273                     "$dotest/msg-clean" |
 274                     tail -n 1
 275                 `
 276                 ADD_SIGNOFF=`
 277                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 278                     test '' = "$LAST_SIGNED_OFF_BY" && echo
 279                     echo "$SIGNOFF"
 280                 }`
 281             else
 282                 ADD_SIGNOFF=
 283             fi
 284             {
 285                 echo "$SUBJECT"
 286                 if test -s "$dotest/msg-clean"
 287                 then
 288                         echo
 289                         cat "$dotest/msg-clean"
 290                 fi
 291                 if test '' != "$ADD_SIGNOFF"
 292                 then
 293                         echo "$ADD_SIGNOFF"
 294                 fi
 295             } >"$dotest/final-commit"
 296             ;;
 297         *)
 298                 case "$resolved,$interactive" in
 299                 tt)
 300                         # This is used only for interactive view option.
 301                         git-diff-index -p --cached HEAD >"$dotest/patch"
 302                         ;;
 303                 esac
 304         esac
 305
 306         resume=
 307         if test "$interactive" = t
 308         then
 309             test -t 0 ||
 310             die "cannot be interactive without stdin connected to a terminal."
 311             action=again
 312             while test "$action" = again
 313             do
 314                 echo "Commit Body is:"
 315                 echo "--------------------------"
 316                 cat "$dotest/final-commit"
 317                 echo "--------------------------"
 318                 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
 319                 read reply
 320                 case "$reply" in
 321                 [yY]*) action=yes ;;
 322                 [aA]*) action=yes interactive= ;;
 323                 [nN]*) action=skip ;;
 324                 [eE]*) "${VISUAL:-${EDITOR:-vi}}" "$dotest/final-commit"
 325                        action=again ;;
 326                 [vV]*) action=again
 327                        LESS=-S ${PAGER:-less} "$dotest/patch" ;;
 328                 *)     action=again ;;
 329                 esac
 330             done
 331         else
 332             action=yes
 333         fi
 334
 335         if test $action = skip
 336         then
 337                 go_next
 338                 continue
 339         fi
 340
 341         if test -x "$GIT_DIR"/hooks/applypatch-msg
 342         then
 343                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 344                 stop_here $this
 345         fi
 346
 347         echo
 348         echo "Applying '$SUBJECT'"
 349         echo
 350
 351         case "$resolved" in
 352         '')
 353                 git-apply $binary --index "$dotest/patch"
 354                 apply_status=$?
 355                 ;;
 356         t)
 357                 # Resolved means the user did all the hard work, and
 358                 # we do not have to do any patch application.  Just
 359                 # trust what the user has in the index file and the
 360                 # working tree.
 361                 resolved=
 362                 apply_status=0
 363                 ;;
 364         esac
 365
 366         if test $apply_status = 1 && test "$threeway" = t
 367         then
 368                 if (fall_back_3way)
 369                 then
 370                     # Applying the patch to an earlier tree and merging the
 371                     # result may have produced the same tree as ours.
 372                     changed="$(git-diff-index --cached --name-only -z HEAD)"
 373                     if test '' = "$changed"
 374                     then
 375                             echo No changes -- Patch already applied.
 376                             go_next
 377                             continue
 378                     fi
 379                     # clear apply_status -- we have successfully merged.
 380                     apply_status=0
 381                 fi
 382         fi
 383         if test $apply_status != 0
 384         then
 385                 echo Patch failed at $msgnum.
 386                 stop_here $this
 387         fi
 388
 389         if test -x "$GIT_DIR"/hooks/pre-applypatch
 390         then
 391                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 392         fi
 393
 394         tree=$(git-write-tree) &&
 395         echo Wrote tree $tree &&
 396         parent=$(git-rev-parse --verify HEAD) &&
 397         commit=$(git-commit-tree $tree -p $parent <"$dotest/final-commit") &&
 398         echo Committed: $commit &&
 399         git-update-ref HEAD $commit $parent ||
 400         stop_here $this
 401
 402         if test -x "$GIT_DIR"/hooks/post-applypatch
 403         then
 404                 "$GIT_DIR"/hooks/post-applypatch
 405         fi
 406
 407         go_next
 408 done
 409
 410 rm -fr "$dotest"