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#!/bin/sh
set -euo pipefail


usage() {
	echo 'Usage: adoc [-x] [-s] [-n INDENT_LEN] FILENAME.adoc'
}

EXTRACT_CODE=false
STANDALONE=false
INDENT_LEN=0
while getopts 'xsn:' flag; do
	case "$flag" in
		(x)
			EXTRACT_CODE=true
			;;
		(s)
			STANDALONE=true
			;;
		(n)
			INDENT_LEN="$OPTARG"
			;;
		(*)
			usage >&2
			exit 2
			;;
	esac
done
shift $((OPTIND - 1))

FILENAME="${1:-}"
eval "$(assert-arg -- "$FILENAME" 'FILENAME.adoc')"


plaintext_links() {
	awk -v BASE="$(basename "$FILENAME" .adoc)".html '
	{ print }
	/^----$/ {
		in_block = !in_block
		if (in_block) {
			next
		}
		file = BASE "." count++ ".txt"
		print "[role=plaintext]"
		print "link:" file "[plaintext]"
	}' "$1"
}

runtidy() {
	statusconv 1:0 tidy \
		-quiet                  \
		-indent                 \
		--indent-attributes yes \
		--show-body-only yes    \
		--show-warnings no      \
		--tidy-mark no          \
		--wrap 120
}

indent_4_blocks() {
	printf '<div><div><div><div>%s</div></div></div></div>' "$(cat -)" |
	runtidy    |
	head -n -4 |
	tail -n +5
}

plaintext_links "$FILENAME" | asciidoctor -s - | indent_4_blocks