#!/bin/bash
# debuginfofs-cleanup - simple script to purge unneeded debuginfo files
# Copyright 2009 Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
# 
# Author: Will Woods <wwoods@redhat.com>

function duration {
    str="$1"
    total=""
    days=${str%%d*}
    [ "$days" != "$str" ] && str=${str##${days}d} || days=0
    hours=${str%%h*}
    [ "$hours" != "$str" ] && str=${str##${hours}h} || hours=0
    mins=${str%%m*} 
    [ "$mins" != "$str" ] || mins=0
    if [[ "$days$hours$mins" =~ ^[0-9]+$ ]]; then 
        total=$((($days*24+$hours)*60+$mins))
    fi
    echo "$total"
}
    
function usage {
    echo "usage: debuginfofs-cleanup DURATION"
    echo "removes any debuginfofs files which haven't been updated recently."
    echo "DURATION is a string of the form: XdXhXm, e.g. '3d', '2h5m'"
    exit 1
}

if [[ ! "$1" =~ ^([0-9]+[dhm])+$ ]]; then
    usage
else
    age=$(duration $1)
    if [ "$age" == "" ]; then
        echo "error: unparseable duration $1"
        usage
    fi
fi

exportdir="$(sed -ne 's/ *exportdir *=\(.*\)$/\1/p' /etc/debuginfofs.conf 2>/dev/null)"

if [ ! -w "$exportdir/build-id" ]; then
    echo "Can't remove files from $exportdir. Aborting."
    exit 1
fi

echo "Looking for files older than $1 ($age min)"
count=$(find $exportdir/build-id -type f -mmin "+$age" | wc -l)
if [ $count -eq 0 ]; then
    echo "Nothing to clean up."
    exit 0
else
    echo "Removing $count debuginfo files"
fi

echo "Before:"
df -h $exportdir
find $exportdir/build-id -type f -mmin "+$age" -delete
find $exportdir/packages -mindepth 3 -maxdepth 3 -mmin "+$age" \
     -exec rm -rf {} +
echo "Now:"
df -h $exportdir