#!/bin/bash -e

# This takes one commandline argument, the name of the package.  If no

# name is given, then we'll end up just using the name associated with

# an arbitrary .tar.gz file in the rootdir.  That's fine: there's probably

# only one.

#

# Run this from the 'packages' directory, just under rootdir

## Set LIB to lib if exporting a library, empty-string else

LIB=

#LIB=lib

PACKAGE="$1"

VERSION="$2"

# We can only build Debian packages, if the Debian build tools are installed

if [ \! -x /usr/bin/debuild ]; then

  echo "Cannot find /usr/bin/debuild. Not building Debian packages." 1>&2

  exit 0

fi

# Double-check we're in the packages directory, just under rootdir

if [ \! -r ../Makefile -a \! -r ../INSTALL ]; then

  echo "Must run $0 in the 'packages' directory, under the root directory." 1>&2

  echo "Also, you must run \"make dist\" before running this script." 1>&2

  exit 0

fi

# Find the top directory for this package

topdir="${PWD%/*}"

# Find the tar archive built by "make dist"

archive="$PACKAGE-$VERSION"

if [ -z "${archive}" ]; then

  echo "Cannot find ../$PACKAGE*.tar.gz. Run \"make dist\" first." 1>&2

  exit 0

fi

# Create a pristine directory for building the Debian package files

trap 'rm -rf '`pwd`/tmp'; exit $?' EXIT SIGHUP SIGINT SIGTERM

rm -rf tmp

mkdir -p tmp

cd tmp

package="google-glog_$VERSION"

# Debian has very specific requirements about the naming of build

# directories, and tar archives. It also wants to write all generated

# packages to the parent of the source directory. We accommodate these

# requirements by building directly from the tar file.

ln -s "${topdir}/${archive}.tar.gz" "${LIB}${package}.orig.tar.gz"

tar zfx "${LIB}${package}.orig.tar.gz"

mv "${archive}" "${LIB}${package}"

cd "${LIB}${package}"

# This is one of those 'specific requirements': where the deb control files live

cp -a "packages/deb" "debian"

# Now, we can call Debian's standard build tool

debuild -uc -us

cd ../..                            # get back to the original top-level dir

# We'll put the result in a subdirectory that's named after the OS version

# we've made this .deb file for.

destdir="debian-$(cat /etc/debian_version 2>/dev/null || echo UNKNOWN)"

rm -rf "$destdir"

mkdir -p "$destdir"

mv $(find tmp -mindepth 1 -maxdepth 1 -type f) "$destdir"

echo

echo "The Debian package files are located in $PWD/$destdir"