find-build-dirs.sh

#!/usr/bin/bash

set -e

protected_packages=(linux-amd-staging-drm-next)
protect_packages() {
	local pkg_name
	for pkg_name; do
		protected_packages+=({,lib32-}"$pkg_name"{,-bin,-git,-hg})
	done
}
protect_packages \
	amdvlk \
	radeontop

declare -a base_dirs
declare -a ignored_packages
while getopts ":d:i:I:p" opt; do
	case ${opt} in
		d)
			base_dirs+=("$OPTARG")
			;;
		i)
			ignored_packages+=("$OPTARG")
			;;
		I)
			ignored_packages+=({,lib32-}"$OPTARG"{,-bin,-git,-hg})
			;;
		p)
			ignored_packages+=("${protected_packages[@]}")
			;;
		\?)
			echo "Unknown argument: -$OPTARG" >&2
			exit 1
			;;
		:)
			printf 'Invalid argument: -%s requires an argument\n' "$OPTARG" >&2
			exit 1
			;;
	esac
done
shift $((OPTIND - 1))

[ ${#base_dirs[@]} -ge 1 ] || base_dirs=(.)

find_build_dirs() {
	if [ $# -lt 1 ]; then
		echo 'Usage: find_build_dirs BASE_DIR' >&2
		return 1
	fi
	local d
	for d in src pkg; do
		find "$1" -mindepth 2 -maxdepth 3 -type d -name "$d"
	done
}

filter_ignored() {
	if [ $# -lt 1 ]; then
		echo 'Usage: filter_ignored BASE_DIR' >&2
		return 1
	fi
	if [ ${#ignored_packages[@]} -lt 1 ]; then
		tee /dev/null
		return $?
	fi
	local pattern="^$1/("
	local pkg_name
	for pkg_name in "${ignored_packages[@]}"; do
		pattern="$pattern($pkg_name)|"
	done
	pattern="${pattern%|})/"
	grep -vE "$pattern"
}

for d in "${base_dirs[@]}"; do
	find_build_dirs "$d" | filter_ignored "$d"
done