#!/bin/sh
#
# distfiles-clean
#
# Cleans unused files from Portage distfiles directory.
#
# José Fonseca <j_r_fonseca@yahoo.co.uk>

PORTDIR=/usr/portage
DISTDIR=$PORTDIR/distfiles
CACHEDIR=$PORTDIR/metadata/cache
PKGDBDIR=/var/db/pkg

TMPFILE=`mktemp /tmp/$0.XXXXXX`

find $PKGDBDIR -name '*.ebuild' | sed -n -e "s:^$PKGDBDIR/\([^/]*\)/\([^/]*\)/\([^/]*\)\.ebuild$:$CACHEDIR/\1/\3:p" | xargs -l sed -e '4!d;s/[[:space:]]\+/\n/g' | sed -n -e 's:^.*/::p' | sort -u > $TMPFILE

ls -1 $DISTDIR | sort -m - $TMPFILE | uniq -u | sed -e "s:^:$DISTDIR/:" | xargs rm -f

rm $TMPFILE