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#!/bin/bash

# Copyright (C) 2011 by Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
#
# This programme is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This programme is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the
# Free Software Foundation, Inc.,
# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.

test -z $1 && { echo "usage: <x2go-git-project> {main,main/<codename>,heuler,heuler/<codename>} [<git-checkout>]"; exit -1; }

set -ex

set_vars() {
	USE_SUDO="yes"
	PDEBUILD="pdebuild --pbuilder qemubuilder"
	TEMP_BASE="$HOME/tmp/"

	# first argv is the name of the Git project
	PROJECT=$1

	# grab repository component area from command line (2nd argv) or guess it
	ARGV2_COMPONENT=$(echo "$2/" | cut -d"/" -f1)
	ARGV2_CODENAME=$(echo "$2/" | cut -d"/" -f2)
	COMPONENT=${ARGV2_COMPONENT:-${COMPONENT:-heuler}}
	CODENAMES=${ARGV2_CODENAME:-${CODENAMES}}
	[ -n "$ARGV2_CODENAME" ] && FORCE_BUILD=0 || FORCE_BUILD=-1
	if [ "x$COMPONENT" = "xmain" ]; then
		CHECKOUT=${3:-build-main}
	elif [ "x$COMPONENT" = "xheuler" ]; then
		CHECKOUT=${3:-master}
		DATE="~${DATE:-$(date +%Y%m%d)}"
	else
		echo "error: no such package component area for X2go packages. Aborting..."
		exit -1
	fi
	# the DATE might be given as ,,today'' from the command line
	[ "x$DATE" = "xtoday" ] && DATE="~$(date +%Y%m%d)"

	# setting paths
	PROJECT_DIR=$HOME/build/$COMPONENT/$PROJECT
	DIST_SUPPORTED="debian ubuntu"
	PKGDIST="$HOME/pkg-dist/$COMPONENT/$PROJECT"

	# creating paths
	mkdir -p "$TEMP_BASE"
	mkdir -p $PROJECT_DIR
	mkdir -p $PKGDIST

	return 0
}

clear_pkgdist() {

	# pkgdist directory cleanup
	cat BUILDS_FOR | egrep -v '(^$|^#.*$)' | while read line; do
		l_DIST=$(echo $line | cut -d":" -f1 | tr [A-Z] [a-z])
		CODENAMES=${CODENAMES:-$(echo $line | cut -d":" -f2- | tr [A-Z] [a#-z])}
		echo "$DIST_SUPPORTED" | grep $l_DIST >/dev/null && {
			for l_CODENAME in $CODENAMES; do
				for l_ARCH in amd64 i386; do
					mkdir -p $PKGDIST/$l_DIST/$l_CODENAME
					rm -f $PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/$PROJECT_*.changes
					rm -f $PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/$PROJECT_*.upload
					rm -f $PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/$PROJECT_*.build
					rm -f $PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/$PROJECT_*.dsc
					rm -f $PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/$PROJECT_*.tar.gz
					rm -f $PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/*.deb
				done
			done
		}
	done
	return 0
}

prepare_workspace() {
	# in any case remove the BUILDS_FOR file
	rm -f $PROJECT_DIR/BUILDS_FOR

	# make sure our local working copy is up to date...
	if [ -d $PROJECT_DIR/.git ]; then 
		cd $PROJECT_DIR && git reset --hard
		git pull origin $CHECKOUT
		git checkout $CHECKOUT || git checkout -b $CHECKOUT
	else
		cd $(dirname $PROJECT_DIR)
		git clone git://code.x2go.org/$PROJECT.git
		cd $PROJECT 
		git checkout $CHECKOUT || git checkout -b $CHECKOUT;
	fi
	cd $PROJECT_DIR

	# by default we build for all current debian versions
	test -f BUILDS_FOR || cat > BUILDS_FOR <<EOF
debian: squeeze wheezy sid
#ubuntu: lucid maverick natty
EOF
	return 0
}

build_packages() {
	# use pbuilder for building all variants of this package
	cat BUILDS_FOR | egrep -v '(^$|^#.*$)' | while read line; do
		l_DIST=$(echo $line | cut -d":" -f1 | tr [A-Z] [a-z])
		CODENAMES=${CODENAMES:-$(echo $line | cut -d":" -f2- | tr [A-Z] [a#-z])}
		echo "$DIST_SUPPORTED" | grep $l_DIST >/dev/null && {
			for l_CODENAME in $CODENAMES; do
				TEMP_DIR="$(mktemp -d --tmpdir=$TEMP_BASE)"
				mkdir -p $TEMP_DIR/$PROJECT
				git clone --local $PROJECT_DIR $TEMP_DIR/$PROJECT/ 
				cd $TEMP_DIR/$PROJECT
				git checkout $CHECKOUT || git checkout master
				GITREV=$(x2go-gitrevno)
				# translate the version name for Debian releases
				[ "x$l_CODENAME" = "xsid" ] && VERSION=unstable
				[ "x$l_CODENAME" = "xwheezy" ] && VERSION=testing
				[ "x$l_CODENAME" = "xsqueeze" ] && VERSION=stable
				[ "x$l_CODENAME" = "xlenny" ] && VERSION=oldstable
				
				# modify the section for non-main package builds
				[ "x$COMPONENT" = "xmain" ] || {
					mv debian/control debian/control.tmp
					cat debian/control.tmp | sed  "s#Section:[\ ]*\(.*\)#Section: $COMPONENT/\1#g" > debian/control
				}
				
				# modify changelog for this build
				DEBEMAIL=git-admin@x2go.org DEBFULLNAME="X2go Git Administrator" dch --distribution $VERSION --force-distribution -l "+$l_CODENAME~$COMPONENT$DATE~$GITREV~build" "Auto-built $l_DIST $l_CODENAME package for packages.x2go.org repository."
				mkdir -p $PKGDIST/$l_DIST/$l_CODENAME/{amd64,i386}
				OTHERMIRROR="deb http://packages.x2go.org/debian $l_CODENAME $COMPONENT"
				[ "x$USE_SUDO" != "xyes" ] && {
					cat debian/control | egrep 'Architecture.*(all|any|amd64)' >/dev/null && {
						DIST=$l_DIST CODENAME=$l_CODENAME ARCH=amd64 $PDEBUILD --auto-debsign --debsign-k F4A7678C9C6B0B2B --buildresult $PKGDIST/$l_DIST/$l_CODENAME/amd64
					}
					cat debian/control | egrep 'Architecture.*(any|i386)' >/dev/null && {
						DIST=$l_DIST CODENAME=$l_CODENAME ARCH=i386  $PDEBUILD --auto-debsign --debsign-k F4A7678C9C6B0B2B --buildresult $PKGDIST/$l_DIST/$l_CODENAME/i386 -- --binary-arch
					}
				}
				[ "x$USE_SUDO" = "xyes" ] && {
					cat debian/control | egrep 'Architecture.*(all|any|amd64)' >/dev/null && {
					    sudo DIST=$l_DIST CODENAME=$l_CODENAME ARCH=amd64 OTHERMIRROR="$OTHERMIRROR" $PDEBUILD --auto-debsign --debsign-k F4A7678C9C6B0B2B --buildresult $PKGDIST/$l_DIST/$l_CODENAME/amd64
					}
					cat debian/control | egrep 'Architecture.*(any|i386)' >/dev/null && {
					    sudo DIST=$l_DIST CODENAME=$l_CODENAME ARCH=i386  OTHERMIRROR="$OTHERMIRROR" $PDEBUILD --auto-debsign --debsign-k F4A7678C9C6B0B2B --buildresult $PKGDIST/$l_DIST/$l_CODENAME/i386 -- --binary-arch
					}
				}
				cd -
				rm -Rf $TEMP_DIR
			done
			echo
		}
		echo
	done
	return 0
}

upload_packages() {
	# dupload the new packages to the reprepro repository
	cd $PKGDIST
	cat $PROJECT_DIR/BUILDS_FOR | egrep -v '(^$|^#.*$)' | while read line; do
		l_DIST=$(echo $line | cut -d":" -f1 | tr [A-Z] [a-z])
		CODENAMES=${CODENAMES:-$(echo $line | cut -d":" -f2- | tr [A-Z] [a#-z])}
		for l_CODENAME in $CODENAMES; do
			for l_ARCH in amd64 i386; do 
				cd $PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH
				ls $PROJECT_*.changes &>/dev/null && dupload --to x2go-$l_DIST-$l_CODENAME $PROJECT_*.changes
				cd -
			done
		done
	done
	cd -
	return 0
}

### MAIN ###
set_vars $@ && {
	if [ "x$(basename $0)" = "xx2go-build-package" ] || [ "x$(basename $0)" = "xx2go-build+upload-package" ]; then
		cd $PROJECT_DIR && x2go-pkgneedsbuild $CHECKOUT || [ "$FORCE_BUILD" -eq 0 ] && {
			clear_pkgdist
			prepare_workspace && {
				build_packages
			}
		}
	fi
	if [ "x$(basename $0)" = "xx2go-upload-package" ] || [ "x$(basename $0)" = "xx2go-build+upload-package" ]; then
		upload_packages
	fi
}