#!/bin/bash

# Purpose: To discover which of your installed packages is broken
# with modular X. Uses a binary search and greps emerge output for blocks on
# X. Will work even if multiple packages are not ported to modular X.

PORTDIR=$(/usr/bin/portageq envvar PORTDIR)
PKGFILE="/var/lib/portage/world"
CATEGORY=$1

decho() {
	if [[ -n "$DEBUG" ]]; then
		echo $@
	fi
}

usage() {
	echo
	echo "${0##*/} [ CATEGORY ]"
	echo "  Discover packages that haven't been ported to modular X dependencies."
	echo "  By default, acts on ${PKGFILE}. If passed CATEGORY,"
	echo "  it will check ${PORTDIR}/CATEGORY instead."
	exit 1
}

# Get all the packages in a given category
get_category_packages() {
	local PORTDIR=$1
	local CATEGORY=$2
	local PKG PKGS
	pushd $PORTDIR &> /dev/null
	for PKG in $(ls $CATEGORY); do
		if [[ "${PKG}" == "CVS" ]]; then
			continue
		elif [[ -d ${CATEGORY}/${PKG} ]]; then
			PKGS="$PKGS ${CATEGORY}/${PKG}"
		fi
	done
	popd &> /dev/null

	echo $PKGS
}

# Takes list of packages, returns list of those blocking modular X
# **char find_blocker(**char full_array)
find_blocker() {
	python /root/modular/find_broken_modular_package.py "${@}"
}

if [[ "$1" = -h ]] || [[ "$1" = --help ]]; then
	usage
fi

if [[ -n "$CATEGORY" ]]; then
	PKGS=$(get_category_packages $PORTDIR $CATEGORY)
else
	PKGS=$(<$PKGFILE)
fi

find_blocker $PKGS