#!/bin/bash
# OpenRA packaging script for Debian based distributions

LINUX_BUILD_ROOT="$(readlink -f "$2")"
DEB_BUILD_ROOT=./root

LIBDIR=/usr/lib/openra
DOCDIR=/usr/share/doc/openra

E_BADARGS=85
if [ $# -ne "3" ]
then
    echo "Usage: `basename $0` version root-dir outputdir"
    exit $E_BADARGS
fi
DATE=`echo $1 | grep -o "[0-9]\\+-\\?[0-9]\\?"`
TYPE=`echo $1 | grep -o "^[a-z]*"`
VERSION="$DATE.$TYPE"

# Copy template files into a clean build directory (required)
mkdir "${DEB_BUILD_ROOT}"
cp -R DEBIAN "${DEB_BUILD_ROOT}"
cp -R "${LINUX_BUILD_ROOT}/usr" "${DEB_BUILD_ROOT}"

# Binaries go in /usr/games
mv "${DEB_BUILD_ROOT}/usr/bin/" "${DEB_BUILD_ROOT}/usr/games/"
sed "s|/usr/bin|/usr/games|g" "${DEB_BUILD_ROOT}/usr/games/openra" > temp
mv -f temp "${DEB_BUILD_ROOT}/usr/games/openra"
chmod +x "${DEB_BUILD_ROOT}/usr/games/openra"
sed "s|/usr/bin|/usr/games|g" "${DEB_BUILD_ROOT}/usr/games/openra-editor" > temp
mv -f temp "${DEB_BUILD_ROOT}/usr/games/openra-editor"
chmod +x "${DEB_BUILD_ROOT}/usr/games/openra-editor"

# Put the copyright and changelog in /usr/share/doc/openra/
mkdir -p "${DEB_BUILD_ROOT}/${DOCDIR}"
cp copyright "${DEB_BUILD_ROOT}/${DOCDIR}/copyright"
cp "${DEB_BUILD_ROOT}/${LIBDIR}/AUTHORS" "${DEB_BUILD_ROOT}/${DOCDIR}"
gzip -9 "${DEB_BUILD_ROOT}/${DOCDIR}/AUTHORS"
DATE=`date -R`

echo -e "openra (${VERSION}) unstable; urgency=low\n" > "${DEB_BUILD_ROOT}/${DOCDIR}/changelog"
cat "../../../Changelog.md" >> "${DEB_BUILD_ROOT}/${DOCDIR}/changelog"
echo -e "\n\n-- Paul Chote <paul@chote.net> ${DATE}" >> "${DEB_BUILD_ROOT}/${DOCDIR}/changelog"
gzip -9 "${DEB_BUILD_ROOT}/${DOCDIR}/changelog"
rm "${DEB_BUILD_ROOT}/${LIBDIR}/COPYING"

# Create the control file
PACKAGE_SIZE=`du --apparent-size -c "${DEB_BUILD_ROOT}/usr" | grep "total" | awk '{print $1}'`
sed "s/{VERSION}/$VERSION/" DEBIAN/control | sed "s/{SIZE}/$PACKAGE_SIZE/" > "${DEB_BUILD_ROOT}/DEBIAN/control"

# Build it in the temp directory, but place the finished deb in our starting directory
pushd "${DEB_BUILD_ROOT}"

# Calculate md5sums and clean up the ./usr/ part of them
find . -type f -not -path "./DEBIAN/*" -print0 | xargs -0 -n1 md5sum | sed 's|\./usr/|/usr/|' > DEBIAN/md5sums
chmod 0644 DEBIAN/md5sums

# Replace any dashes in the version string with periods
PKGVERSION=`echo $1 | sed "s/-/\\./g"`

# Start building, the file should appear in the output directory
fakeroot dpkg-deb -b . "$3/openra_${PKGVERSION}_all.deb"

# Clean up
popd
rm -rf "${DEB_BUILD_ROOT}"