#!/usr/bin/rc

## 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:

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

shift
sys=`{cran2deb which_system}
mkdir -p /var/cache/cran2deb/results/$sys || exit 1
#update_period=10800
update_period=108
if (~ $1 full || ![ -e /var/cache/cran2deb/cache.rda ] ) {
    delta=`{awk 'END{print '^$update_period^'+1}' </dev/null}
    echo Forcing cache update
} else {
    delta=`{awk 'END{print '^`{date +%s}^-^`{stat -c '%Y' /var/cache/cran2deb/cache.rda}^'}' </dev/null}
    echo Cache is $delta seconds out of date, auto-update after $update_period seconds.
}
if (![ -e /var/cache/cran2deb/cache.rda ] || [ $delta -gt $update_period ]) {
    mode=create
    if ([ -e /var/cache/pbuilder/base-cran2deb-$sys.tgz ]) {
        mode=update
    }
    echo C: sudo pbuilder $mode --override-config --configfile /etc/cran2deb/sys/$sys/pbuilderrc
    echo "Executing sudo pbuilder $mode --override-config --configfile /etc/cran2deb/sys/$sys/pbuilderrc"
    sudo pbuilder $mode --override-config --configfile /etc/cran2deb/sys/$sys/pbuilderrc
    echo "Executing $root/exec/update_cache $root"
    $root/exec/update_cache $root
}