#!/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

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=$(cran2deb which_system)
mkdir -p /var/cache/cran2deb/results/$sys
#update_period=10800
update_period=108

if [ ! $1 = full ] || [ ! -e /var/cache/cran2deb/cache.rda ]; then
    delta=$(($update_period+1))
    echo Forcing cache update
else
    seconds_time=$(date +%s)
    seconds_file=$(stat -c '%Y' /var/cache/cran2deb/cache.rda)
    delta=$(($seconds_time-$seconds_file))
    echo Cache is $delta seconds out of date, auto-update after $update_period seconds.
fi

if [ ! -e /var/cache/cran2deb/cache.rda ] || [ $delta -gt $update_period ]; then
    mode=create
    if [ -e /var/cache/pbuilder/base-cran2deb-$sys.tgz ]; then
        mode=update
    fi
    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
fi