#!/bin/bash
set -x

# use a mandatory first arg of "run" when not running as GIT_SSH
if [ "run" != "$1" ]; then
        # just exec ssh with some extra arguments
	exec ssh \
		-i "$git_publish_keyfile"	\
		-o "StrictHostKeyChecking no"	\
		"$@"
fi

# running as git push script

export GIT_SSH="$0"

# set some defaults if not already set
#
git_tag=""	# if set then pushing tag instead of branch
git_force=""

# parse commandline arguments
#
shift	# drop the mandatory "run" argument
while (( $# > 0 )) ; do
	case $1 in
		--local_branch)
			git_local_branch=$2
			shift
			;;
		--remote_branch)
			git_remote_branch=$2
			shift
			;;
		--remote_repo)
			git_remote_repo=$2
			shift
			;;
		--tag)
			git_tag=$2
			shift
			;;
		-f|--force)
			git_force="-f"
			;;
		--keyfile)
			export git_publish_keyfile=$2
			shift
			;;
	esac
	shift
done

[ -n "$git_publish_keyfile" ] || { echo "--keyfile KEYFILENAME is required"; exit 1; }

remote_name=remote_random_$RANDOM
git remote add $remote_name $git_remote_branch

if [ $git_tag ]
then
	git push $git_force $git_remote_repo $git_tag
else
	git push $git_force $git_remote_repo $git_local_branch:refs/heads/$git_remote_branch
fi

# cleanup
git remote rm $remote_name

exit 0