# vim: ft=sh

## Simple echo wrappers #########################################################
echo_stage() {
	echo -e "\033[1;34m========== $@ ==========\033[0m ($(date))" >&2
}
echo_info() {
	echo -e "\033[1;32m---------- $@ ----------\033[0m" >&2
}
echo_debug() {
	echo -e "\033[1;30m--- $@ ---\033[0m" >&2
}
echo_fail() {
	echo -e "\033[1;31m---------- $@ ----------\033[0m" >&2
	return 1
}

## Cleanup handler ##############################################################
_LAMINAR_LOCKS=""
_handle_exit() {
	# Release all locks
	for LOCK in $_LAMINAR_LOCKS; do
		laminarc release "$(basename "$0")-$LOCK"
	done
}
trap _handle_exit EXIT

# Verify that we are running in process that was configured with trap (not in
# subprocess)
_check_trap() {
	[ -n "$(trap -p EXIT)" ] || \
		echo_fail "Unable to use this function as trap handling is not available in subprocess"
}

#################################################################################
# Fetch bare git repository to WORKSPACE
# First argument has to be a source URL
# Second argument is name of directory to which will be repository cloned to.
git_fetch_bare() {
	if [ -d "$WORKSPACE/$2" ]; then
		git --git-dir="$WORKSPACE/$2" --bare remote update --prune
	else
		git clone --mirror "$1" "$WORKSPACE/$2"
	fi
}

# Calls git_fetch_bare and then creates detached work tree in run directory
# First agument has to be a source URL
# Second argument is name of directory to which will be directory cloned in.
# Second argument is optional and should be branch name (master is used if not
# provided).
git_fetch() {
	git_fetch_bare "$1" "$2"
	local BRANCH="$3"
	[ -n "$BRANCH" ] || BRANCH=master
	git --git-dir="$WORKSPACE/$2" --bare worktree add --detach $2 $BRANCH
}

# Lock special lock for this job
# Extension appended to lock name has to be provided as first argument
laminar_self_lock() {
	_check_trap
	_LAMINAR_LOCKS="$_LAMINAR_LOCKS $1"
	laminarc lock "$(basename "$0")-$1"
	echo_debug "Locking $1"
}

# Unlock special lock for this job
# Extension appended to lock name has to be provided as first argument
laminar_self_release() {
	_check_trap
	laminarc release "$(basename "$0")-$1"
	_LAMINAR_LOCKS="$(echo "$_LAMINAR_LOCKS" | sed "s/ $1//")"
	echo_debug "Releasing $1"
}