#!/bin/bash

PORTDIR=$(portageq portdir)
DISTDIR=$(portageq envvar DISTDIR)

cd "${PORTDIR}"
[[ $# -le 0 ]] \
	&& SEARCH_PATHS=$(ls -d *-*) \
	|| SEARCH_PATHS="${@}"

# Broken digest (wrong SHA256 on some $DISTFILES files)
find ${SEARCH_PATHS} -name "digest-*" | \
while read digest ; do
	pkgdir="${digest%%/files/*}"
	ebuild="${pkgdir}/${digest##*/files/digest-}.ebuild"
	sed -n 's:^SHA256 \([0-9a-f]\+\) \([^ ]\+\) .*:\2 \1:p' "${digest}" | \
	while read digest_file digest_sha ; do
		[[ -f ${DISTDIR}/${digest_file} ]] || continue
		good_sha=$(sha256deep "${DISTDIR}/${digest_file}")
		good_sha="${good_sha%% *}"
		[[ ${good_sha} == ${digest_sha} ]] && continue
		echo "Wrong digest for ${ebuild} on ${digest_file}"
		#fix: ebuild "${ebuild}" digest
	done
done

# Broken Manifest (wrong SHA256 on some $PORTDIR files)
find ${SEARCH_PATHS} -name "Manifest" | \
while read manifest ; do
	pkgdir="${manifest%%/Manifest}"
	ebuild=$(ls -1 ${pkgdir}/*.ebuild 2>/dev/null | head -n 1) || continue
	sed -n 's:^SHA256 \([0-9a-f]\+\) \([^ ]\+\) .*:\2 \1:p' "${manifest}" | \
	while read manifest_file manifest_sha ; do
		[[ -f ${pkgdir}/${manifest_file} ]] || continue
		good_sha=$(sha256deep "${pkgdir}/${manifest_file}")
		good_sha="${good_sha%% *}"
		[[ ${good_sha} == ${manifest_sha} ]] && continue
		echo "Wrong Manifest in ${pkgdir} on ${manifest_file}"
		#fix: ebuild "${ebuild}" digest
	done
done