git-am.sh

   1 #!/bin/sh
   2 #
   3 #
   4 . git-sh-setup || die "Not a git archive"
   5
   6 files=$(git-diff-index --cached --name-only HEAD) || exit
   7 if [ "$files" ]; then
   8    echo "Dirty index: cannot apply patches (dirty: $files)" >&2
   9    exit 1
  10 fi
  11
  12 usage () {
  13     echo >&2 "usage: $0 [--signoff] [--dotest=<dir>] [--utf8] [--3way] <mbox>"
  14     echo >&2 "  or, when resuming"
  15     echo >&2 "  $0 [--skip]"
  16     exit 1;
  17 }
  18
  19 stop_here () {
  20     echo "$1" >"$dotest/next"
  21     exit 1
  22 }
  23
  24 go_next () {
  25         rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
  26                 "$dotest/patch" "$dotest/info"
  27         echo "$next" >"$dotest/next"
  28         this=$next
  29 }
  30
  31 fall_back_3way () {
  32     O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
  33
  34     rm -fr "$dotest"/patch-merge-*
  35     mkdir "$dotest/patch-merge-tmp-dir"
  36
  37     # First see if the patch records the index info that we can use.
  38     if git-apply --show-index-info "$dotest/patch" \
  39         >"$dotest/patch-merge-index-info" 2>/dev/null &&
  40         GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  41         git-update-index --index-info <"$dotest/patch-merge-index-info" &&
  42         GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  43         git-write-tree >"$dotest/patch-merge-base+" &&
  44         # index has the base tree now.
  45         (
  46             cd "$dotest/patch-merge-tmp-dir" &&
  47             GIT_INDEX_FILE="../patch-merge-tmp-index" \
  48             GIT_OBJECT_DIRECTORY="$O_OBJECT" \
  49             git-apply --index <../patch
  50         )
  51     then
  52         echo Using index info to reconstruct a base tree...
  53         mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
  54         mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
  55     else
  56         # Otherwise, try nearby trees that can be used to apply the
  57         # patch.
  58         (
  59             N=10
  60
  61             # Hoping the patch is against our recent commits...
  62             git-rev-list --max-count=$N HEAD
  63
  64             # or hoping the patch is against known tags...
  65             git-ls-remote --tags .
  66         ) |
  67         while read base junk
  68         do
  69             # See if we have it as a tree...
  70             git-cat-file tree "$base" >/dev/null 2>&1 || continue
  71
  72             rm -fr "$dotest"/patch-merge-* &&
  73             mkdir "$dotest/patch-merge-tmp-dir" || break
  74             (
  75                 cd "$dotest/patch-merge-tmp-dir" &&
  76                 GIT_INDEX_FILE=../patch-merge-tmp-index &&
  77                 GIT_OBJECT_DIRECTORY="$O_OBJECT" &&
  78                 export GIT_INDEX_FILE GIT_OBJECT_DIRECTORY &&
  79                 git-read-tree "$base" &&
  80                 git-apply --index &&
  81                 mv ../patch-merge-tmp-index ../patch-merge-index &&
  82                 echo "$base" >../patch-merge-base
  83             ) <"$dotest/patch"  2>/dev/null && break
  84         done
  85     fi
  86
  87     test -f "$dotest/patch-merge-index" &&
  88     his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git-write-tree) &&
  89     orig_tree=$(cat "$dotest/patch-merge-base") &&
  90     rm -fr "$dotest"/patch-merge-* || exit 1
  91
  92     echo Falling back to patching base and 3-way merge...
  93
  94     # This is not so wrong.  Depending on which base we picked,
  95     # orig_tree may be wildly different from ours, but his_tree
  96     # has the same set of wildly different changes in parts the
  97     # patch did not touch, so resolve ends up cancelling them,
  98     # saying that we reverted all those changes.
  99
 100     git-merge-resolve $orig_tree -- HEAD $his_tree || {
 101             echo Failed to merge in the changes.
 102             exit 1
 103     }
 104 }
 105
 106 prec=4
 107 dotest=.dotest sign= utf8= keep= skip= interactive=
 108
 109 while case "$#" in 0) break;; esac
 110 do
 111         case "$1" in
 112         -d=*|--d=*|--do=*|--dot=*|--dote=*|--dotes=*|--dotest=*)
 113         dotest=`expr "$1" : '-[^=]*=\(.*\)'`; shift ;;
 114         -d|--d|--do|--dot|--dote|--dotes|--dotest)
 115         case "$#" in 1) usage ;; esac; shift
 116         dotest="$1"; shift;;
 117
 118         -i|--i|--in|--int|--inte|--inter|--intera|--interac|--interact|\
 119         --interacti|--interactiv|--interactive)
 120         interactive=t; shift ;;
 121
 122         -3|--3|--3w|--3wa|--3way)
 123         threeway=t; shift ;;
 124         -s|--s|--si|--sig|--sign|--signo|--signof|--signoff)
 125         sign=t; shift ;;
 126         -u|--u|--ut|--utf|--utf8)
 127         utf8=t; shift ;;
 128         -k|--k|--ke|--kee|--keep)
 129         keep=t; shift ;;
 130
 131         --sk|--ski|--skip)
 132         skip=t; shift ;;
 133
 134         --)
 135         shift; break ;;
 136         -*)
 137         usage ;;
 138         *)
 139         break ;;
 140         esac
 141 done
 142
 143 if test -d "$dotest" &&
 144    last=$(cat "$dotest/last") &&
 145    next=$(cat "$dotest/next") &&
 146    test $# != 0 &&
 147    test "$next" -gt "$last"
 148 then
 149    rm -fr "$dotest"
 150 fi
 151
 152 if test -d "$dotest"
 153 then
 154         test ",$#," = ",0," ||
 155         die "previous dotest directory $dotest still exists but mbox given."
 156 else
 157         # Make sure we are not given --skip
 158         test ",$skip," = ,, ||
 159         die "we are not resuming."
 160
 161         # Start afresh.
 162         mkdir -p "$dotest" || exit
 163
 164         # cat does the right thing for us, including '-' to mean
 165         # standard input.
 166         cat "$@" |
 167         git-mailsplit -d$prec "$dotest/" >"$dotest/last" || {
 168                 rm -fr "$dotest"
 169                 exit 1
 170         }
 171
 172         echo "$sign" >"$dotest/sign"
 173         echo "$utf8" >"$dotest/utf8"
 174         echo "$keep" >"$dotest/keep"
 175         echo 1 >"$dotest/next"
 176 fi
 177
 178 if test "$(cat "$dotest/utf8")" = t
 179 then
 180         utf8=-u
 181 fi
 182 if test "$(cat "$dotest/keep")" = t
 183 then
 184         keep=-k
 185 fi
 186 if test "$(cat "$dotest/sign")" = t
 187 then
 188         SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
 189                         s/>.*/>/
 190                         s/^/Signed-off-by: /'
 191                 `
 192 else
 193         SIGNOFF=
 194 fi
 195
 196 last=`cat "$dotest/last"`
 197 this=`cat "$dotest/next"`
 198 if test "$skip" = t
 199 then
 200         this=`expr "$this" + 1`
 201 fi
 202
 203 if test "$this" -gt "$last"
 204 then
 205         echo Nothing to do.
 206         rm -fr "$dotest"
 207         exit
 208 fi
 209
 210 while test "$this" -le "$last"
 211 do
 212         msgnum=`printf "%0${prec}d" $this`
 213         next=`expr "$this" + 1`
 214         test -f "$dotest/$msgnum" || {
 215                 go_next
 216                 continue
 217         }
 218         git-mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
 219                 <"$dotest/$msgnum" >"$dotest/info" ||
 220                 stop_here $this
 221         git-stripspace < "$dotest/msg" > "$dotest/msg-clean"
 222
 223         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 224         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 225         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 226         SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
 227
 228         case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
 229         if test '' != "$SIGNOFF"
 230         then
 231                 LAST_SIGNED_OFF_BY=`
 232                         sed -ne '/^Signed-off-by: /p' "$dotest/msg-clean" |
 233                         tail -n 1
 234                 `
 235                 ADD_SIGNOFF=$(test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 236                     test '' = "$LAST_SIGNED_OFF_BY" && echo
 237                     echo "$SIGNOFF"
 238                 })
 239         else
 240                 ADD_SIGNOFF=
 241         fi
 242         {
 243                 echo "$SUBJECT"
 244                 if test -s "$dotest/msg-clean"
 245                 then
 246                         echo
 247                         cat "$dotest/msg-clean"
 248                 fi
 249                 if test '' != "$ADD_SIGNOFF"
 250                 then
 251                         echo "$ADD_SIGNOFF"
 252                 fi
 253         } >"$dotest/final-commit"
 254
 255         if test "$interactive" = t
 256         then
 257             test -t 0 ||
 258             die "cannot be interactive without stdin connected to a terminal."
 259             action=again
 260             while test "$action" = again
 261             do
 262                 echo "Commit Body is:"
 263                 echo "--------------------------"
 264                 cat "$dotest/final-commit"
 265                 echo "--------------------------"
 266                 echo -n "Apply? [y]es/[n]o/[e]dit/[a]ccept all "
 267                 read reply
 268                 case "$reply" in
 269                 y*|Y*) action=yes ;;
 270                 a*|A*) action=yes interactive= ;;
 271                 n*|N*) action=skip ;;
 272                 e*|E*) "${VISUAL:-${EDITOR:-vi}}" "$dotest/final-commit"
 273                        action=again ;;
 274                 esac
 275             done
 276         else
 277             action=yes
 278         fi
 279
 280         if test $action = skip
 281         then
 282                 go_next
 283                 continue
 284         fi
 285
 286         if test -x "$GIT_DIR"/hooks/applypatch-msg
 287         then
 288                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 289                 stop_here $this
 290         fi
 291
 292         echo
 293         echo "Applying '$SUBJECT'"
 294         echo
 295
 296         git-apply --index "$dotest/patch"; apply_status=$?
 297         if test $apply_status = 1 && test "$threeway" = t
 298         then
 299                 if (fall_back_3way)
 300                 then
 301                     # Applying the patch to an earlier tree and merging the
 302                     # result may have produced the same tree as ours.
 303                     changed="$(git-diff-index --cached --name-only -z HEAD)"
 304                     if test '' = "$changed"
 305                     then
 306                             echo No changes -- Patch already applied.
 307                             go_next
 308                             continue
 309                     fi
 310                     # clear apply_status -- we have successfully merged.
 311                     apply_status=0
 312                 fi
 313         fi
 314         if test $apply_status != 0
 315         then
 316                 echo Patch failed at $msgnum.
 317                 stop_here $this
 318         fi
 319
 320         if test -x "$GIT_DIR"/hooks/pre-applypatch
 321         then
 322                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 323         fi
 324
 325         tree=$(git-write-tree) &&
 326         echo Wrote tree $tree &&
 327         parent=$(git-rev-parse --verify HEAD) &&
 328         commit=$(git-commit-tree $tree -p $parent <"$dotest/final-commit") &&
 329         echo Committed: $commit &&
 330         git-update-ref HEAD $commit $parent ||
 331         stop_here $this
 332
 333         if test -x "$GIT_DIR"/hooks/post-applypatch
 334         then
 335                 "$GIT_DIR"/hooks/post-applypatch
 336         fi
 337
 338         go_next
 339 done
 340
 341 rm -fr "$dotest"