#!/bin/sh
#
destination=FETCH_HEAD

merge_repo=$1
merge_name=${2:-HEAD}
if [ "$2" = "tag" ]; then
	merge_name="refs/tags/$3"
	destination="$merge_name"
fi

: ${GIT_DIR=.git}
: ${GIT_OBJECT_DIRECTORY="${SHA1_FILE_DIRECTORY-"$GIT_DIR/objects"}"}
TMP_HEAD="$GIT_DIR/TMP_HEAD"

case "$merge_repo" in
http://*)
	head=$(wget -q -O - "$merge_repo/$merge_name") || exit 1
	echo Fetching $head using http
	git-http-pull -v -a "$head" "$merge_repo/"
	;;
rsync://*)
	rsync -L "$merge_repo/$merge_name" "$TMP_HEAD" || exit 1
	head=$(git-rev-parse TMP_HEAD)
	rm -f "$TMP_HEAD"
	rsync -avz --ignore-existing "$merge_repo/objects/" "$GIT_OBJECT_DIRECTORY/"
	;;
*)
	head=$(git-fetch-pack "$merge_repo" "$merge_name")
	;;
esac || exit 1
git-rev-parse --verify "$head" > /dev/null || exit 1
echo "$head" > "$GIT_DIR/$destination"