#!/bin/sh
set -eu

usage() {
	cat <<-'EOF'
		Usage:
		  dynmake.sh
		  dynmake.sh -h
	EOF
}

help() {
	cat <<-'EOF'

		Options:
		  -h, --help    show this message
	EOF
}

for flag in "$@"; do
	case "$flag" in
		--)
			break
			;;
		--help)
			usage
			help
			exit
			;;
		*)
			;;
	esac
done

while getopts 'h' flag; do
	case "$flag" in
		h)
			usage
			help
			exit
			;;
		*)
			usage >&2
			exit 2
			;;
	esac
done
shift $((OPTIND - 1))

assert_arg() {
	if [ -z "$1" ]; then
		printf 'Missing %s.\n' "$2" >&2
		exit 2
	fi
}



varlist() {
	sed -e 's/^/	/' \
	    -e 's/$/ \\/'
}

#
# Pastebins
#

pastebins() {
	find src/content/pastebin/ -name '*.md'
}

printf 'pastebins.md = \\\n'
pastebins | varlist
printf '\n'

pastebins | sed 's/^\(.*\)\.md$/\1.html: \1.env/'



#
# torrent files
#

torrents() {
	find resources/ \
		-name '*.flac' -or \
		-name '*.webm'
}

printf 'torrent-files = \\\n'
torrents | sed 's|$|.torrent|' | varlist
printf '\n'

torrents | awk '{ printf "%s.torrent: %s\n", $0, $0 }'


#
# Lilypond files
#

lilyponds() {
	find music/ -name '*.ly'
}

printf 'lilypond.ly = \\\n'
lilyponds | varlist
printf '\n'

lilyponds | sed 's/^\(.*\)\.ly$/\1.pdf: \1.midi/'


#
# Podcasts
#

podcasts() {
	find resources/podcasts/ -name '*.flac'
}

printf 'podcasts.flac = \\\n'
podcasts | varlist
printf '\n'