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#!/bin/bash

# Script to automate building of r-base and r-recommended packages for
# the Ubuntu release specified in file /etc/lsb-release. This script
# should be run as root, in one way or another.

# Author: Vincent Goulet <vincent.goulet@act.ulaval.ca>
# Modified for backporting to Debian etch by 
# Johannes Ranke <jranke@uni-bremen.de>
# Last Change: 2008 Apr 24

export DEBEMAIL="Johannes Ranke <jranke@uni-bremen.de>"

rm -rf r-base* r-base-core* r-mathlib*

apt-get update
apt-get source -t unstable r-base
cd r-base-*

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

# Add new version to changelog
dch -v "${cranversion}" -D etch-cran -b "Backport form Debian unstable to Debian etch"

# Reverts for etch:
#
# 1. Starting with Debian packages for R 2.6.1-2, the build dependency
#    to 'refblas3-dev|atlas3-base-dev' is changed to 'libblas-dev' to
#    use the new gfortran-built BLAS libraries. From R 2.7.0, the
#    dependency is on 'libblas-dev | libatlas-base-dev' for
#    r-base-dev.

sed -i '/^Build-Depends/s/libblas-dev/refblas3-dev|atlas3-base-dev/' debian/control
sed -i '/^Depends/s/libblas-dev | libatlas-base-dev/refblas3-dev|atlas3-base-dev/' debian/control
dch -a "debian/control: revert Build-Depends: to 'refblas3-dev|atlas3-base-dev' and Depends: to 'refblas3-dev|atlas3-base-dev' since etch does not have the new gfortran-built BLAS libraries"

# 2. Starting with Debian packages for R 2.6.2, new build dependency
#    on liblapack-dev to switch back to using Debian's Lapack rather
#    than the version supplied by R. From R 2.7.0, the dependency is
#    on 'liblapack-dev (>= 3.1.1)' for r-base and 'liblapack-dev |
#    libatlas-base-dev' for r-base-dev.

sed -i '/^Build-Depends/s/liblapack-dev (>= 3.1.1), //' debian/control
sed -i '/^Depends/s/liblapack-dev | libatlas-base-dev, //' debian/control
    dch -a "debian/control: revert Build-Depends: and Depends: fields since we use the Lapack supplied with R"
    sed -i '/^lapack/{
s/lapack/\#lapack/
a\
# jr 24 Apr 2008 Set to =no for Debian etch
a\lapack		= --with-lapack=no
}'  debian/rules
    dch -a "debian/rules: Accordingly, do not configure --with-lapack"

# 3. Requirement for tk8.4 >= 8.4.16-2 introduced in r-base 2.6.0-4 to
#    circumvent a breakage with 8.4.16-1. The version in etch is 8.4.12-1etch2.

rm debian/shlibs.local
dch -a "delete debian/shlibs.local since the dependency on tk8.4 is not an issue for Debian etch"

# 4. The TeX distribution in etch is tetex

sed -i '/^Build-Depends/s/texlive-base, texlive-latex-base, texlive-generic-recommended, texlive-fonts-recommended, texlive-extra-utils, texlive-latex-recommended, texlive-latex-extra, texinfo, texi2html/tetex-bin, tetex-extra/' debian/control
dch -a "debian/control: revert Build-Depends: to 'tetex-bin, tetex-extra' since etch does not have texlive"

# Build package showing all messages and separating output to build and error logs
(dpkg-buildpackage -tc | tee ../build_log_r-base_i386) 3>&1 1>&2 2>&3 | tee ../build_errors_r-base_i386
if [ $? -ne 0 ]; then
    exit 1
fi

cd ..

# Create diff to Debian unstable
interdiff -z *.diff.gz > interdiff_to_debian_sid

# Sign logs and interdiff
for i in interdiff_to_debian_sid build_log_r-base_i386 build_errors_r-base_i386
do
  gpg --clearsign $i
  mv $i.asc $i
done

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