git-resolve-script

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005 Linus Torvalds
   4 #
   5 # Resolve two trees.
   6 #
   7 . git-sh-setup-script || die "Not a git archive"
   8
   9 head=$(git-rev-parse --verify "$1")
  10 merge=$(git-rev-parse --verify "$2")
  11 merge_msg="$3"
  12
  13 dropheads() {
  14         rm -f -- "$GIT_DIR/MERGE_HEAD" \
  15                 "$GIT_DIR/LAST_MERGE" || exit 1
  16 }
  17
  18 #
  19 # The remote name is just used for the message,
  20 # but we do want it.
  21 #
  22 if [ -z "$head" -o -z "$merge" -o -z "$merge_msg" ]; then
  23         die "git-resolve-script <head> <remote> <merge-message>"
  24 fi
  25
  26 dropheads
  27 echo $head > "$GIT_DIR"/ORIG_HEAD
  28 echo $merge > "$GIT_DIR"/LAST_MERGE
  29
  30 common=$(git-merge-base $head $merge)
  31 if [ -z "$common" ]; then
  32         die "Unable to find common commit between" $merge $head
  33 fi
  34
  35 if [ "$common" == "$merge" ]; then
  36         echo "Already up-to-date. Yeeah!"
  37         dropheads
  38         exit 0
  39 fi
  40 if [ "$common" == "$head" ]; then
  41         echo "Updating from $head to $merge."
  42         git-read-tree -u -m $head $merge || exit 1
  43         echo $merge > "$GIT_DIR"/HEAD
  44         git-diff-tree -p $head $merge | git-apply --stat
  45         dropheads
  46         exit 0
  47 fi
  48 echo "Trying to merge $merge into $head"
  49 git-read-tree -u -m $common $head $merge || exit 1
  50 result_tree=$(git-write-tree  2> /dev/null)
  51 if [ $? -ne 0 ]; then
  52         echo "Simple merge failed, trying Automatic merge"
  53         git-merge-cache -o git-merge-one-file-script -a
  54         if [ $? -ne 0 ]; then
  55                 echo $merge > "$GIT_DIR"/MERGE_HEAD
  56                 die "Automatic merge failed, fix up by hand"
  57         fi
  58         result_tree=$(git-write-tree) || exit 1
  59 fi
  60 result_commit=$(echo "$merge_msg" | git-commit-tree $result_tree -p $head -p $merge)
  61 echo "Committed merge $result_commit"
  62 echo $result_commit > "$GIT_DIR"/HEAD
  63 git-diff-tree -p $head $result_commit | git-apply --stat
  64 dropheads