#!/bin/bash -ex

orig_git=$HOME/caas

# want to make sure that what is pointed to has a .git directory ...
git_dir=$(cd "$orig_git" 2>/dev/null && git rev-parse --git-dir 2>/dev/null)
if test $? -ne 0; then
	echo "Not a git repository: \"$orig_git\""
	exit 128
fi

case "$git_dir" in
	.git)
		git_dir="$orig_git/.git"
		;;
	.)
		git_dir=$orig_git
		;;
esac

# don't link to a configured bare repository
isbare=$(git --git-dir="$git_dir" config --bool --get core.bare)
if test ztrue = "z$isbare"; then
	echo "\"$git_dir\" has core.bare set to true, remove from \"$git_dir/config\" to use $0"
	exit 128
fi

# don't link to a workdir
if test -h "$git_dir/config"; then
	echo "\"$orig_git\" is a working directory only, please specify a complete repository."
	exit 128
fi

# make sure the links in the workdir have full paths to the original repo
git_dir=$(cd "$git_dir" && pwd) || exit 1

mkdir -p "$WORKSPACE/.git"

# create the links to the original repo.  explicitly exclude index, HEAD and
# logs/HEAD from the list since they are purely related to the current working
# directory, and should not be shared.
for x in config refs logs/refs objects info hooks packed-refs remotes rr-cache svn
do
	# create a containing directory if needed
	case $x in
		*/*)
			mkdir -p "$WORKSPACE/.git/${x%/*}"
			;;
	esac

	ln -s "$git_dir/$x" "$WORKSPACE/.git/$x"
done

# copy the HEAD from the original repository as a default branch
cp "$git_dir/HEAD" $WORKSPACE/.git/HEAD