#!/bin/bash

# Buildpkg script for producing RPM packages. (Does not require root access.)
# Buildpkg is designed to be used by both buildbot (to automate rpm production)
# and by J Random User (to build an rpm for kicks).  The odd way of handling
# all optioins through environment variables is a product of buildbot.
#
# AMVER: the version of amanda we're working on.  This will become part of the
#     rpm name.  AMVER must line up with the version number mentioned in the
#     .spec file.
# AMTARBALL: the name of the tarball which contains the source code.  it must
#     unpack into a directory named AMVER.  It's easiest and safest to just 
#     let the script create a new one for you, even if it's a bit more overhead
# AMPKGDIR: Rpmbuild expects absolute paths, so we provide this var.  It also
#     allows you to build somewhere other than `pwd`.  You probably don't want
#     to use the system-wide location, as the script tries to blow these
#     directories away.
# 
# Other Hints:
# Not everyone will want to use the ./configure options we provide.  The
# easiest way to change them is by editing the .spec file.  This isn't so
# easy, unfortunately.  Look at the %build section, and the %define xxxx 
# statements immediately above it. good luck.

# This is useful for debugging
set -x
# Buildbot exports some useful env variables.
# Check for $AMVER.  I couldn't come up with a good way to detect it.
if [ -z $AMVER ]; then
    AMVER=amanda-2.6.1
fi

# Check for AMTARBALL variable.
if [ -z $AMTARBALL ]; then 
    AMTARBALL=$AMVER.tar.gz
fi

# Check for AMTARBALL file, if it's not there, create it.
if [ ! -f ${AMTARBALL} ]; then
    mkdir ${AMVER}
    cp -Rfp * ${AMVER}/
    tar -cf ${AMTARBALL} -z ${AMVER} || exit 1
    rm -rf ${AMVER}
fi

# Check for the packaging dirs.
if [ -z $AMPKGDIR ]; then
    AMPKGDIR=${PWD}
fi
if [ ! -d ${AMPKGDIR} ]; then
    mkdir ${AMPKGDIR} || exit 1
fi
cd ${AMPKGDIR}

if [ -d rpm ]; then
    rm -rf rpm || exit 1
fi
mkdir rpm
mkdir rpm/SOURCES
mkdir rpm/SRPMS
mkdir rpm/SPECS
mkdir rpm/BUILD
mkdir rpm/RPMS || exit 1

# Make a copy of the tarball with the name that rpmbuild expects
cp ${AMTARBALL} rpm/SOURCES/${AMVER}.tar.gz || exit 1
cp packaging/rpm/amanda.spec rpm/SPECS || exit 1
# Rpmbuild requires absolute paths.  annoying.  If you need to change the 
# default value of some rpm.spec variable, just pass extra --define options.
# this is useful for changing %amanda_release or %amanda_version
rpmbuild -ba --define "_topdir ${AMPKGDIR}/rpm" \
             ${AMPKGDIR}/rpm/SPECS/amanda.spec || exit 1
cp rpm/RPMS/*/*.rpm . || exit 1
cp rpm/SRPMS/*.rpm . || exit 1