#!/bin/bash

# Script to automate backporting r-base for CRAN

# Author: Johannes Ranke <jranke@uni-bremen.de>

# Developed in parallel with Vincent Goulet <vincent.goulet@act.ulaval.ca>
# On Debian I used to run this script as root. On Ubuntu I now run it with 
# sudo -E sh backport_r-base.sh

# Preconditions: - shell variables DIST and ARCH
#                - sid sources in /etc/apt/sources/list
#                - cdbs installed (and maybe more)

export DEBEMAIL="jranke@uni-bremen.de"
export DEBFULLNAME="Johannes Ranke"
echo Distribution is $DIST
echo Architecture is $ARCH

if [ -d r-base-* ]
then
    rm -rf `ls -d r-base-*`
fi

apt-get update
apt-get source r-base

# Change any ~ in the name of the build directory for a - to avoid a
# bug in texi2dvi. Thanks Vincent
if [ -d r-base-*~* ]
then
    dir=`ls -d r-base-*~*`
    mv $dir `echo $dir | sed y/~/-/`
fi

cd r-base-*

# Old version
oldversion=`dpkg-parsechangelog | grep ^Version | cut -f2 -d " "`
cranversion=$oldversion"~"$DIST"cran.0"

echo Old version is $oldversion
echo CRAN version is $cranversion

# Add new version to changelog
dch -v "${cranversion}" --force-distribution -D $DIST-cran -b "Backport from Debian unstable to Debian $DIST"

# Reverts for squeeze:
    # 1. Starting with Debian packages for R 2.15.3 there is a build
    # dependency on 'libtiff5-dev' which is not in squeeze. Changing to
    # libtiff-dev, which is libtiff4-dev on squeeze.

    sed -i '/^Build-Depends/s/libtiff5-dev/libtiff-dev/' debian/control
    dch -a "debian/control: Change Build-Depends: from libtiff5-dev to libtiff-dev"

pbuilder update
pdebuild --debbuildopts '-sa' --buildresult /home/ranke/svn/website/www/ranke/r-cran/$DIST-cran3/ -- --distribution $DIST --basetgz /var/cache/pbuilder/$DIST-$ARCH-base.tgz --aptcache /var/cache/pbuilder/$DIST-$ARCH/aptcache --buildplace /var/cache/pbuilder/$DIST-$ARCH/build
if [ $? -ne 0 ]; then
    exit 
fi

cd ..