#!/bin/bash

## DOC: cran2deb update
## DOC:     update the cran2deb cache and database
## DOC: cran2deb update full
## DOC:     force a full update of the cran2deb cache and database
## DOC:

set -e
cachedir="${CRAN2DEB_CACHE:-/var/cache/cran2deb}/results/"
pbuildercache="${CRAN2DEB_PBUILDER_CACHE:-/var/cache/pbuilder/}"

umask 002
root=$1
if [ -z "$root" ]; then
       echo "You need to specify the root of your installation, i.e. the folder in which to find the exec subdirectory."
       exit 1
fi

shift
sys=$(cran2deb which_system)
mkdir -p "${cachedir}"/"$sys"
#update_period=10800
update_period=108

cache_rda="${cachedir}/cache.rda"
if [ ! $1 = full ] || [ ! -e "${cache_rda}" ]; then
    delta=$(($update_period+1))
    echo Forcing cache update
else
    seconds_time=$(date +%s)
    seconds_file=$(stat -c '%Y' "${cache_rda}")
    delta=$(($seconds_time-$seconds_file))
    echo Cache is $delta seconds out of date, auto-update after $update_period seconds.
fi

if [ ! -e "${cache_rda}" ] || [ $delta -gt $update_period ]; then
    if [ "${CRAN2DEB_BUILD}" == "yes" ]; then
	mode=create
	if [ -e "${pbuilder_cache}"/base-cran2deb-$sys.tgz ]; then
            mode=update
	fi
	echo C: sudo pbuilder $mode --override-config --configfile "${CRAN2DEB_CONFDIR:-/etc/cran2deb}"/sys/"$sys"/pbuilderrc
	echo "Executing sudo pbuilder $mode --override-config --configfile ${CRAN2DEB_CONFDIR:-/etc/cran2deb}/sys/$sys/pbuilderrc"
	sudo pbuilder $mode --override-config --configfile "${CRAN2DEB_CONFDIR:-/etc/cran2deb}"/sys/"$sys"/pbuilderrc
    fi;
    echo "Executing $root/exec/update_cache $root"
    $root/exec/update_cache $root
fi