git-pull-script

   1 #!/bin/sh
   2 #
   3 # use "$1" or something in a real script, this
   4 # just hard-codes it.
   5 #
   6 merge_repo=$1
   7
   8 echo "Getting object database"
   9 rsync -avz --ignore-existing $merge_repo/ .git/
  10
  11 echo "Getting remote head"
  12 rsync -avz $merge_repo/HEAD .git/MERGE_HEAD
  13
  14 head=$(cat .git/HEAD)
  15 merge_head=$(cat .git/MERGE_HEAD)
  16 common=$(merge-base $head $merge_head)
  17 if [ -z "$common" ]; then
  18         echo "Unable to find common commit between" $merge_head $head
  19         exit 1
  20 fi
  21
  22 # Get the trees associated with those commits
  23 common_tree=$(cat-file commit $common | sed 's/tree //;q')
  24 head_tree=$(cat-file commit $head | sed 's/tree //;q')
  25 merge_tree=$(cat-file commit $merge_head | sed 's/tree //;q')
  26
  27 if [ "$common" == "$merge_head" ]; then
  28         echo "Already up-to-date. Yeeah!"
  29         exit 0
  30 fi
  31 if [ "$common" == "$head" ]; then
  32         echo "Updating from $head to $merge_head."
  33         echo "Destroying all noncommitted data!"
  34         echo "Kill me within 3 seconds.."
  35         sleep 3
  36         read-tree $merge_tree && checkout-cache -f -a && update-cache --refresh
  37         echo $merge_head > .git/HEAD
  38         exit 0
  39 fi
  40 echo "Trying to merge $merge_head into $head"
  41 read-tree -m $common_tree $head_tree $merge_tree
  42 result_tree=$(write-tree) || exit 1
  43 result_commit=$(echo "Merge $merge_repo" | commit-tree $result_tree -p $head -p $merge_head)
  44 echo "Committed merge $result_commit"
  45 echo $result_commit > .git/HEAD
  46 read-tree $result_tree && checkout-cache -f -a && update-cache --refresh