#!/bin/sh

set -e
set -u

main()
{
	case "${1-}" in
		'')
			config
			;;
		'clean')
			clean
			;;
	esac
}

msg()
{
	printf 'config: '
	printf "${@}"
	printf '\n'
}

config()
{
	local plat=
	local pkg=

	plat="$(sed '1{s/^config-\([^ ][^ ]*\) (.*$/\1/;};1!q;' changelog)"

	# Make "-common" package to provide source package documentation files.
	mkdir -p "config-${plat}-common.pkg"
	cat >"config-${plat}-common.pkg/control" <<-EOF
		Architecture: all
		Platform: all
		Description: "${plat}" platform configuration - common files
		EOF
	>"config-${plat}-common.pkg/docs"
	msg 'Metadata for package "%s" generated.' "config-${plat}-common"

	# Make each config-* package.
	for pkg in src/build/*; do
		pkg="${pkg#src/build/}"
		mkdir -p "config-${pkg}-${plat}.pkg"
		cat >"config-${pkg}-${plat}.pkg/control" <<-EOF
			Architecture: all
			Platform: all
			Depends: config-${plat}-common (= \${Binary-Version})
			Description: "${plat}" platform configuration for ${pkg}
			EOF
		msg 'Metadata for package "%s" generated.' \
			"config-${pkg}-${plat}"
	done
	for pkg in src/run/*; do
		pkg="${pkg#src/run/}"
		mkdir -p "config-${pkg}.pkg"
		cat >"config-${pkg}.pkg/control" <<-EOF
			Architecture: all
			Platform: ${plat}
			Depends: config-${plat}-common (= \${Binary-Version})
			Description: "${plat}" platform configuration for ${pkg}
			EOF
		msg 'Metadata for package "%s" generated.' \
			"config-${pkg}"
	done
}

clean()
{
	rm -Rf config-*.pkg/
}

main "${@}"