#!/bin/bash

# Copyright (C) 2011-2013 by Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
# Copyright (C) 2015      by Mihai Moldovan <ionic@ionic.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.

export PATH=~/bin:$PATH

GIT_USER="gituser"
GIT_HOSTNAME="git.mydomain.org"

RPMEMAIL="firstname.lastname@mydomain.org"
RPMFULLNAME="Firstname Lastname"
GPG_KEY=""
RPM_DISTS_SUPPORTED="fedora epel opensuse sle"
FEDORA_DISTROS="18,19,20,21,rawhide"
EPEL_DISTROS="6,7"
OPENSUSE_DISTROS="12.2,12.3,13.1,13.2"
SLE_DISTROS="11.2,11.3,12.0"
RPM_REPOS_BASE=/var/www/
RPM_WANT_EXTRA_REPOS="0"
RPM_MOCK_CONFIG_DIR="/etc/mock"
RPM_EXTRA_REPO_MOCK_CONFIG_BASE=""
RPM_EXTRA_REPO_MOCK_CONFIG_FULL_NAME=""


COMPONENT_MAIN="main"
COMPONENT_NIGHTLY="nightly"
COMPONENT_BUNDLES="bundle-release1 bundle-release2"
REPOS_SERVER="packages.mydomain.org"
PACKAGES_WITHOUT_OTHERMIRROR="keyring"
GNUPGHOME=$HOME/.gnupg

OPENSUSE_DOWNLOAD_URL="http://download.opensuse.org/distribution/#VERSION#/repo/oss/suse/"
SLE_DOWNLOAD_URL="/srv/mirrors/non-public/sle/#VERSION#/rpms/"

test -z $1 && { echo "usage: $(basename $0) [<subpath>/]<git-project> {main,main/<codename>,nightly,nightly/<codename>} [<git-checkout>]"; exit -1; }

PREFIX=$(echo `basename $0` | cut -d"-" -f1)
test -f ~/.buildscripts/$PREFIX.conf && . ~/.buildscripts/$PREFIX.conf || { echo "$0 has no valid context prefix..."; exit -1; }

NO_DELAY=${NO_DELAY:-"no"}
FORCE_BUILD=${FORCE_BUILD:-"no"}
RPM_BUILD_FOR=${RPM_BUILD_FOR:-"fedora:$FEDORA_DISTROS epel:$EPEL_DISTROSi opensuse:$OPENSUSE_DISTROS" sle:$SLE_DISTROS}

# These parts are not user-servicable.
TMP_MOCK_CFG_DIR=""
TMP_MOCK_CFG_FILE=""
# End of non-user-servicable part.

set -ex

# Cleans up temporary directories and files.
# RFC SHOULD be called by trap handlers.
cleanup () {
	# We always assume the temporary mock config file is below the temporary config directory.
	if [ -n "${TMP_MOCK_CFG_DIR}" ]; then
		# Take care of the config file first.
		if [ -n "${TMP_MOCK_CFG_FILE}" ]; then
			if [ -e "${TMP_MOCK_CFG_FILE}" ]; then
				# Explicit test after the general existence test so that we can
				# print an error message if the file we're looking at is not a
				# regular file.
				# BEWARE OF RACE CONDITIONS, though.
				if [ -f "${TMP_MOCK_CFG_FILE}" ]; then
					rm "${TMP_MOCK_CFG_DIR}/${TMP_MOCK_CFG_FILE}"
				else
					echo "Warning: file '$(readlink -nf "${TMP_MOCK_CFG_DIR}/${TMP_MOCK_CFG_FILE}")' is not a regular file. Not unlinking." >&2
				fi
			else
				echo "Warning: mock temporary config directory set as ${TMP_MOCK_CFG_DIR}, but mock temporary config file ${TMP_MOCK_CFG_FILE} does not exist." >&2
			fi
		else
			echo "Warning: mock temporary config directory set as ${TMP_MOCK_CFG_DIR}, but mock temporary config file unknown." >&2
		fi

		# And only later of the directory itself.
		if [ -e "${TMP_MOCK_CFG_DIR}" ]; then
			if [ -d "${TMP_MOCK_CFG_DIR}" ]; then
				rmdir "${TMP_MOCK_CFG_DIR}" || echo "Warning: unable to remove mock temporary config directory ${TMP_MOCK_CFG_DIR}. Is it non-empty?" >&2
			else
				echo "Warning: mock temporary config directory ${TMP_MOCK_CFG_DIR} is not actually a directory. Not unlinking." >&2
			fi
		else
			echo "Warning: mock temporary config directory ${TMP_MOCK_CFG_DIR} does not exist." >&2
		fi
	else
		if [ -n "${TMP_MOCK_CFG_FILE}" ]; then
			echo "Warning: mock temp not set, but temporary mock config file ${TMP_MOCK_CFG_FILE} set." >&2
		else
			echo "Warning: did not find any mock temporary config directory or file set. Not removing anything." >&2
		fi
	fi
}

# Run cleanup() automatically.
trap cleanup EXIT SIGTERM SIGINT SIGHUP SIGPIPE SIGALRM SIGUSR1 SIGUSR2

# FIXME: this should really be in a common.(sh) file!
function make_boolean () {
	typeset -l OPTION="${1}"

	case "${OPTION}" in
		("0"|"no"|"false"|"") OPTION="0";;
		(*) OPTION="1";;
	esac

	printf "${OPTION}"
}

set_vars() {
	TEMP_BASE="$HOME/tmp/"
	mkdir -p "$TEMP_BASE"
	chmod 2770 "$TEMP_BASE"

	# first argv is the name of the Git project
	PROJECT_PATH="$1"
	PROJECT_PATH=${PROJECT_PATH/%.git/}
	PROJECT="$(basename $PROJECT_PATH)"

	# 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:-${COMPONENT:-$COMPONENT_NIGHTLY}}"
	CODENAMES="${ARGV2_CODENAME:-${CODENAMES}}"
	[ -n "$ARGV2_CODENAME" ] && FORCE_BUILD="yes" || true
	DATE="${DATE:-$(date +%Y%m%d)}"
	if [ "x$COMPONENT" = "x$COMPONENT_MAIN" ]; then
		CHECKOUT="${3:-build-main}"
	elif [ "x$COMPONENT" = "x${COMPONENT_MAIN}-test" ]; then
		CHECKOUT="${3:-build-main-test}"
		COMPONENT="maintest"
	elif echo "$COMPONENT_RELEASES" | grep "$COMPONENT" >/dev/null; then
		CHECKOUT="${3:-build-$COMPONENT}"
	elif [ "x$COMPONENT" = "x$COMPONENT_NIGHTLY" ]; then
		CHECKOUT="${3:-master}"
	else
		echo "error: no such package component area for this Git project. 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/$PROJECT"
	PKGDIST="$HOME/pkg-dist/$COMPONENT/$PROJECT"

	# lock file
	LOCK_FILE=$PROJECT_DIR/../.$PROJECT.lock

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

	return 0
}

# Check that mock version is at least the given version number.
# Returns 0 if the mock version is greater or equal the specified input,
# 1 otherwise.
check_mock_version_atleast () {
	typeset MAJOR="${1:?"Error: no major version passed to ${FUNCNAME}()."}"
	typeset MINOR="${2:?"Error: no minor version passed to ${FUNCNAME}()."}"
	typeset PATCH="${3:?"Error: no patch version passed to ${FUNCNAME}()."}"

	# Check input parameters for sanity.
	typeset SANITY_CHECK_MAJOR="$(sed -e 's/^\([0-9][0-9]*\)$//' <<< "${MAJOR}")"
	typeset SANITY_CHECK_MINOR="$(sed -e 's/^\([0-9][0-9]*\)$//' <<< "${MINOR}")"
	typeset SANITY_CHECK_PATCH="$(sed -e 's/^\([0-9][0-9]*\)$//' <<< "${PATCH}")"

	if [ -n "${SANITY_CHECK_MAJOR}" ] || [ -n "${SANITY_CHECK_MINOR}" ] || [ -n "${SANITY_CHECK_PATCH}" ]; then
		echo "Error: input parameters of ${FUNCNAME}() are not pure integers and failed sanity check." >&2
		exit -1
	fi

	typeset MOCK_VER="$(mock --version)"

	# Sanitize ${MOCK_VER}:
	# Only take the first line into account.
	MOCK_VER="$(head -n 1 <<< "${MOCK_VER}")"

	# Only accept a string that has number.number.number somewhere.
	MOCK_VER="$(grep -Eo '[0-9]+\.[0-9]+\.[0-9]+' <<< "${MOCK_VER}")"

	if [ -z "${MOCK_VER}" ]; then
		echo "Error: the reported mock version can not be handled by ${FUNCNAME}()." >&2
		exit -1
	fi

	# The reason for this weird [0-9][0-9]* construct is that POSIX BRE does only specify *
	# as a special character. POSIX ERE supports + as a special character, but sed is
	# specified by POSIX to only support BRE. GNU sed supports a \+ special character in
	# POSIX BRE standard mode, but this is a GNU extension.
	typeset MOCK_VER_MAJOR="$(sed -e 's/^\([0-9][0-9]*\)\.[0-9][0-9]*\.[0-9][0-9]*/\1/' <<< "${MOCK_VER}")"
	typeset MOCK_VER_MINOR="$(sed -e 's/^[0-9][0-9]*\.\([0-9][0-9]*\)\.[0-9][0-9]*/\1/' <<< "${MOCK_VER}")"
	typeset MOCK_VER_PATCH="$(sed -e 's/^[0-9][0-9]*\.[0-9][0-9]*\.\([0-9][0-9]*\)/\1/' <<< "${MOCK_VER}")"

	if [ -z "${MOCK_VER_MAJOR}" ] || [ -z "${MOCK_VER_MINOR}" ] || [ -z "${MOCK_VER_PATCH}" ]; then
		echo "Error: unable to parse mock version in ${FUNCNAME}()." >&2
		exit -1
	else
		typeset ret="1"
		if [ "${MOCK_VER_MAJOR}" -gt "${MAJOR}" ]; then
			ret="0"
		elif [ "${MOCK_VER_MAJOR}" -eq "${MAJOR}" ]; then
			if [ "${MOCK_VER_MINOR}" -gt "${MINOR}" ]; then
				ret="0"
			elif [ "${MOCK_VER_MINOR}" -eq "${MINOR}" ]; then
				if [ "${MOCK_VER_PATCH}" -gt "${PATCH}" ] || \
				   [ "${MOCK_VER_PATCH}" -eq "${PATCH}" ]; then
					ret="0"
				fi
			fi
		fi

		return "${ret}"
	fi
}

# Repeats an input string.
# Returns the repeated input string.
repeat_str () { # INPUT COUNT
	typeset INPUT="${1:?"Error: no input string passed to ${FUNCNAME}()."}"
	typeset COUNT="${2:?"Error: no count passed to ${FUNCNAME}()."}"

	typeset ret=""
	typeset -i i=0
	while [ "${i}" -lt "${COUNT}" ]; do
		ret="${ret}$(printf "${INPUT}")"
		i=$(($i + 1))
	done
	printf "${ret}"
}

# Creates a custom mock config file given a base config (taken from
# /etc/mock/), the build component and the target specification ("full" or "base").
# Base refers to adding x2go-extras only, while full means also
# adding the full X2Go upstream repository with all published files.
# The created config file path is returned.
create_mock_config () { # MOCK_BASE CUSTOM_REPO COMPONENT TARGET
	typeset MOCK_BASE="${1:?"Error: no mock base config passed to ${FUNCNAME}()."}"
	typeset COMPONENT="${2:?"Error: no component (X2Go release group) passed to ${FUNCNAME}()."}"
	typeset TARGET="${3:?"Error: no target (full or base) passed to ${FUNCNAME}()."}"

	typeset ret=""

	# Check argument sanity.
	typeset DISTRO=""
	typeset TMP_REGEX='^([[:alpha:]]+)-[[:alnum:]]+-[[:alnum:]].cfg$'
				# distribution -  version   - arch
	if [[ ! "${MOCK_BASE}" =~ ${TMP_REGEX} ]]; then
		echo "Error: MOCK_BASE parameter not well formed. Must be: 'distro-version-arch.cfg'." >&2
		exit -1
	else
		DISTRO="${BASH_REMATCH[1]}"
	fi

	typeset CUSTOM_REPO="${RPM_EXTRA_REPO_MOCK_CONFIG_BASE}-${DISTRO}.repo"

	typeset CFG_FILE=""
	TMP_REGEX='/'
	for CFG_FILE in MOCK_BASE CUSTOM_REPO; do
		# Must be plain file.
		if [[ "${!CFG_FILE}" =~ ${TMP_REGEX} ]]; then
			echo "Error: (implicit) ${CFG_FILE} parameter must not be a path but a simple file name." >&2
			exit -1
		fi

		# Must exist and be readable.
		if [ ! -f "${RPM_MOCK_CONFIG_DIR}/${!CFG_FILE}" ] || [ ! -r "${RPM_MOCK_CONFIG_DIR}/${!CFG_FILE}" ]; then
			echo "Error: ${CFG_FILE} parameter must exist, be a regular file and readable." >&2
			exit -1
		fi
	done

	# Rename "main" to "release" and "heuler" to "nightly".
	if [ "${COMPONENT}" = "main" ]; then
		COMPONENT="release"
	elif [ "${COMPONENT}" = "heuler" ]; then
		COMPONENT="nightly"
	fi

	# Note: there is no way to check for the component's validity,
	# as LTS releases have "random" names assigned to them.

	if [ "${TARGET}" != "base" ] && [ "${TARGET}" != "full" ]; then
		echo "Error: TARGET parameter must be either full or base." >&2
		exit -1
	fi

	# Create temporary directory for our soon-to-be temporary mock config file.
	TMP_MOCK_CFG_DIR="$(mktemp -d --tmpdir="${TEMP_BASE}" "${RPM_EXTRA_REPO_MOCK_CONFIG_BASE}-mock-$(repeat_str "X" "24")")"
	if [ "$?" -ne "0" ]; then
		echo "Error: creating mock temporary config directory failed. Aborting." >&2
		exit -1
	fi

	TMP_MOCK_CFG_FILE="$(mktemp --tmpdir="${TEMP_BASE}" "$(basename "${TMP_MOCK_CFG_DIR}")/${MOCK_BASE}-${RPM_EXTRA_REPO_MOCK_CONFIG_BASE}-${COMPONENT}-${TARGET}.$(repeat_str "X" "24").cfg")"
	if [ "$?" -ne "0" ]; then
		echo "Error: creating mock temporary config file failed. Aborting." >&2
		exit -1
	fi

	# Save old input field separator value and set it to newline only.
	OLDIFS="${IFS}"
	IFS="$(printf '\n')"

	# Fetch the requested lines from ${CUSTOM_REPO} and store them in arrays.
	typeset -a extra_repo
	typeset -a full_repo
	typeset -i FETCH_EXTRA_SECTION=0
	typeset -i FETCH_FULL_SECTION=0
	typeset TMP_REGEX_EXTRA="^[[:space:]]*\[[[:space:]]*${RPM_EXTRA_REPO_MOCK_CONFIG_BASE}-extras-${DISTRO}[[:space:]]*\][[:space:]]*\$"
	typeset TMP_REGEX_FULL="^[[:space:]]*\[[[:space:]]*${RPM_EXTRA_REPO_MOCK_CONFIG_BASE}-${COMPONENT}-${DISTRO}[[:space:]]*\][[:space:]]*\$"
	typeset TMP_REGEX_OTHER='^[[:space:]]*\[.*\][[:space:]]*$'

	while read line; do
		if [[ "${line}" =~ ${TMP_REGEX_EXTRA} ]]; then
			FETCH_EXTRA_SECTION=1
			FETCH_FULL_SECTION=0
		elif [[ "${line}" =~ ${TMP_REGEX_FULL} ]]; then
			FETCH_FULL_SECTION=1
			FETCH_EXTRA_SECTION=0
		elif [[ "${line}" =~ ${TMP_REGEX_OTHER} ]]; then
			FETCH_FULL_SECTION=0
			FETCH_EXTRA_SECTION=0
		fi

		if [ "${FETCH_EXTRA_SECTION}" -eq "1" ]; then
			extra_repo+=("${line}")
		elif [ "${FETCH_FULL_SECTION}" -eq "1" ]; then
			full_repo+=("${line}")
		fi
	done < "/etc/mock/${CUSTOM_REPO}"

	typeset -i REPO_START=0
	TMP_REGEX='^[[:space:]]*config_opts\['"'"'yum\.conf'"'"'\][[:space:]]*=[[:space:]]*"""[[:space:]]*$'
	typeset TMP_REGEX_END='^[[:space:]]*"""[[:space:]]*$'

	while read line; do
		if [[ "${line}" =~ ${TMP_REGEX} ]]; then
			REPO_START=1
		elif [ "${REPO_START}" -eq "1" ] && [[ "${line}" =~ ${TMP_REGEX_END} ]]; then
			# Time to insert whatever is required.
			printf '\n' >> "${TMP_MOCK_CFG_FILE}"

			# Extras repo.
			typeset -i i=0
			for ((i = 0; i < ${#extra_repo[@]}; ++i)); do
				echo "${extra_repo[${i}]}" >> "${TMP_MOCK_CFG_FILE}"
			done

			# Full repo if required.
			if [ "${TARGET}" = "full" ]; then
				printf '\n' >> "${TMP_MOCK_CFG_FILE}"

				typeset -i i=0
				for ((i = 0; i < ${#full_repo[@]}; ++i)); do
					echo "${full_repo[${i}]}" >> "${TMP_MOCK_CFG_FILE}"
				done
			fi

			echo "${line}" >> "${TMP_MOCK_CFG_FILE}"
		elif [ "${REPO_START}" -eq "0" ] && [[ "${line}" =~ ${TMP_REGEX_END} ]]; then
			echo "Error: Parsing mock base config file failed: unexpected end of yum configuration, no start found." >&2
			exit -1
		else
			# Write-through.
			echo "${line}" >> "${TMP_MOCK_CFG_FILE}"
		fi
	done < "/etc/mock/${MOCK_BASE}"

	# Reset input field separator to original value.
	IFS="${OLDIFS}"

	# Strictly speaking not necessary, but do it anyway.
	printf "${TMP_MOCK_CFG_FILE}"
}

# Fetches extras repositories, if requested.
# Takes the build system type (suse or redhat -- implicitly means OBS or mock),
# the distribution, its version (either a real number or a codename),
# the build component (X2Go release group), the package, the architecture
# and an optional boolean value that determines whether to add any additional
# repositories at all.
# Returns a string that can be passed to obs-build or mock.
get_extra_repository () {
	typeset TYPE="${1:?"Error: no type passed to ${FUNCNAME}()."}"
	typeset DIST="${2:?"Error: no distribution passed to ${FUNCNAME}()."}"
	typeset CODENAME="${3:?"Error: no codename (distro 'version') passed to ${FUNCNAME}()."}"
	typeset COMPONENT="${4:?"Error: no component (X2Go release group) passed to ${FUNCNAME}()."}"
	typeset PACKAGE="${5:?"Error: no package passed to ${FUNCAME}()."}"
	typeset ARCH="${6:?"Error: no architecture passed to ${FUNCNAME}()."}"
	typeset WANT_EXTRA="$(make_boolean "${7}")"

	typeset ret=""
	# Note: we always add the extras repo, because that's defined as "packages missing from the main repository".
	case "${TYPE}" in
		"suse")
			# FIXME: make this package repository consistent with our main ones.
			ret="--repo http://${REPOS_SERVER}/${DIST}/${CODENAME}/extras"
			if [ -z "${PACKAGE_WITHOUT_OTHERMIRROR}" ] || [ "${PACKAGE_WITHOUT_OTHERMIRROR}" != "${PACKAGE}" ]; then
				ret="${ret} --repo http://${REPOS_SERVER}/${DIST}/${CODENAME}/${COMPONENT}/${ARCH}"
			fi
			;;
		"redhat")
			# Always use -r.
			ret="-r "
			if [ -n "${RPM_MOCK_CONFIG_DIR}" ]; then
				# FIXME: these files should probably be autogenerated to lessen maintenance load.

				# Itsy-bitsy problem here: mock versions prior to 1.2.0 are buggy in the sense that
				# they *always* prepend /etc/mock/ and append .cfg to any chroot file specified
				# via -r, even if the argument is an absolute path.
				# We have to work around that by specifying ../..//PATH/TO/MOCK-CONFIG and leaving
				# out the ".cfg" part.
				# Find out if we're using a buggy version.
				check_mock_version_atleast "1" "2" "0" && typeset MOCK_BUGGY="0" || typeset MOCK_BUGGY="1"

				[ "${MOCK_BUGGY}" -eq "1" ] && ret="${ret}../../"

				# Add config base dir if specified.
				ret="${ret}${RPM_MOCK_CONFIG_DIR}/"

				# Mock config file names shall follow the format:
				# distname-distversion-arch[-component-extra_repo_base_name[-extra_repo_full_name]]
				# ^------ mandatory ------^^---------------------- optional ----------------------^
				# ^------- default -------^            ^--- for extras ---^^--- for everything ---^

				# Add mandatory, default value.
				ret="${ret}${DIST}-${CODENAME}-${ARCH}"
				if [ -n "${RPM_EXTRA_REPO_MOCK_CONFIG_BASE}" ]; then
					ret="${ret}-${COMPONENT}-${RPM_EXTRA_REPO_MOCK_CONFIG_BASE}"

					if [ -n "${RPM_EXTRA_REPO_MOCK_CONFIG_FULL_NAME}" ] && [ -z "${PACKAGE_WITHOUT_OTHERMIRROR}" ] || \
					   [ "${PACKAGE_WITHOUT_OTHERMIRROR}" != "${PACKAGE}" ]; then
						ret="${ret}-${RPM_EXTRA_REPO_MOCK_CONFIG_FULL_NAME}"
					fi
				fi

				# Add .cfg extension.
				[ "${MOCK_BUGGY}" -eq "0" ] && ret="${ret}.cfg"
			else
				# As the default directory /etc/mock is non-writable, assume we don't have
				# special mock configs.
				ret="${ret}${DIST}-${CODENAME}-${ARCH}"
			fi
			;;
		*)
			echo "Error: unknown type passed to ${FUNCNAME}()" >&2
			echo "Valid values: suse, redhat." >&2
			exit -1
			;;
	esac

	echo "${ret}"
}

prepare_workspace() {
	# make sure our local working copy is up to date...
	if [ -d "$PROJECT_DIR/.git" ]; then 
		cd "$PROJECT_DIR" && git reset --hard
		git checkout --force $CHECKOUT || git checkout --force -b $CHECKOUT
		git pull origin $CHECKOUT
		git fetch origin upstream:upstream || true
		git fetch origin pristine-tar:pristine-tar || true
		# and again, get the $CHECKOUT refspec in pure state
		git reset --hard
		git clean -df
	else
		cd "$(dirname $PROJECT_DIR)"
		git clone git://$GIT_HOSTNAME/$PROJECT_PATH.git
		cd "$PROJECT"
		git checkout --force $CHECKOUT || git checkout --force -b $CHECKOUT;
		git fetch origin upstream:upstream
		git fetch origin pristine-tar:pristine-tar || true
		git clean -df
	fi

	GIT_OBJECT_ID=`git show-ref -s heads/master`
	cd "$PROJECT_DIR"

	if [ "x$ARGV2_CODENAME" != "x" ]; then
		if echo "$FEDORA_DISTROS" | grep $ARGV2_CODENAME >/dev/null; then
			RPM_BUILD_FOR="fedora:$ARGV2_CODENAME"
		elif echo "$EPEL_DISTROS" | grep $ARGV2_CODENAME >/dev/null; then
			RPM_BUILD_FOR="epel:$ARGV2_CODENAME"
		fi
	fi
	return 0
}

clear_pkgdist() {
	# pkgdist directory cleanup
	echo "$RPM_BUILD_FOR" | sed -e 's/ /\n/g' | while read line; do
		l_DIST="$(echo ${line/: /:} | cut -d":" -f1 | tr [:upper:] [:lower:])"
		l_CODENAMES="${CODENAMES:-$(echo ${line/: /:} | cut -d":" -f2- | sed -e 's/,/ /g' | tr [:upper:] [:lower:])}"
		echo "$RPM_DISTS_SUPPORTED" | grep $l_DIST >/dev/null && {
			for l_CODENAME in $l_CODENAMES; do

				test -z $CODENAMES || echo $line | grep $CODENAMES || break

				# Yes, "SRPM" is technically not an architecture.
				for l_ARCH in x86_64 i386 SRPM; do
					if [ "x$SKIP_ARCH" != "x$l_ARCH" ]; then
						mkdir -p "$PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH"
						rm -f "$PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/rpmbuild/SOURCES/"*
						rm -f "$PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/rpmbuild/SRPMS/$PROJECT-"*.src.rpm
						rm -f "$PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/"*.rpm
					fi
				done
			done
		}
	done
	return 0
}

build_packages() {
	echo "$RPM_BUILD_FOR" | sed -e 's/ /\n/g' | while read line; do
		l_DIST="$(echo ${line/: /:} | cut -d":" -f1 | tr [:upper:] [:lower:])"
		l_CODENAMES="${CODENAMES:-$(echo ${line/: /:} | cut -d":" -f2- | sed -e 's/,/ /g' | tr [:upper:] [:lower:])}"
		echo "$RPM_DISTS_SUPPORTED" | grep $l_DIST >/dev/null && {
			for l_CODENAME in $l_CODENAMES; do

				test -z $CODENAMES || echo $line | grep $CODENAMES || break

				# create rpmbuild subdirectories
				mkdir -p $PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/rpmbuild/SOURCES

				# tar upstream sources from our Git clone
				TEMP_DIR="$(mktemp -d --tmpdir=$TEMP_BASE)"
				mkdir -p "$TEMP_DIR/$PROJECT"
				chmod 2770 "$TEMP_DIR" -Rf

				cd "$PROJECT_DIR"
				git clone "$PROJECT_DIR" "$TEMP_DIR/$PROJECT/"
				cd $TEMP_DIR
				GITREV=$(cd $PROJECT && gitrevno && cd - 1>/dev/null)

				# create git changelog immediately prior to building the SRPM package
				cd $PROJECT && git --no-pager log --since "2 years ago" --format="%ai %aN (%h) %n%n%x09*%w(68,0,10) %s%d%n" > ChangeLog.gitlog && cd - 1>/dev/null

				rm -Rf "$PROJECT/.git"
				mv $PROJECT/$PROJECT.spec .

				UPSTREAM_VERSION=$(cat $PROJECT.spec | egrep "^Version:.*" | awk '{ print $2 }')
				PKG_RELEASE=$(cat $PROJECT.spec | egrep "^Release:.*" | awk '{ print $2 }')
				PKG_SRCRELEASE=$(echo $PKG_RELEASE | sed -e 's/%{?dist}//')

				IS_NOARCH=$(cat $PROJECT.spec | egrep "^BuildArch:.*noarch\$" 1>/dev/null 2>/dev/null && echo yes || echo no)

				if [ "$COMPONENT" = "$COMPONENT_NIGHTLY" ]; then
					IS_RELEASE="0"
				else
					IS_RELEASE="1"
				fi
				sed -i $PROJECT.spec -e "s/%{?dist}/.$IS_RELEASE.git$DATE.$GITREV.$COMPONENT%{?dist}/"

				# apply patches from debian/patches/* so that they end up in the tarbal
				# ... esp. relevant for NX (redistributed)
				if [ -f $PROJECT/debian/patches/series ]; then
					( cd $PROJECT && QUILT_PATCHES=debian/patches quilt push -a && rm .pc/ -Rf; )
				fi

				cat $PROJECT.spec | egrep "^Source[1-9]+:.*" | sed "s/%{name}/$PROJECT/" | awk '{ print $2 }' | while read source_file; do
					find $PROJECT/rpm/$source_file -maxdepth 0 1> /dev/null && cp $PROJECT/rpm/$source_file $PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/rpmbuild/SOURCES/ && continue
					find $PROJECT/$source_file -maxdepth 0 1> /dev/null && cp $PROJECT/$source_file $PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/rpmbuild/SOURCES/
				done

				mv $TEMP_DIR/$PROJECT $TEMP_DIR/$PROJECT-$UPSTREAM_VERSION
				tar -czf $PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/rpmbuild/SOURCES/$PROJECT-$UPSTREAM_VERSION.tar.gz $PROJECT-$UPSTREAM_VERSION

				cp $PROJECT.spec $PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/rpmbuild/SOURCES

				if [ "x$l_DIST" = "xfedora" ] || [ "x$l_DIST" = "xepel" ]; then
					while [ -d ~mock/${l_DIST}-${l_CODENAME}-x86_64 ]; do
						echo "Waiting for some other build to finish..."
						sleep 30
					done
					rm -f $PKGDIST/$l_DIST/$l_CODENAME/x86_64/build.log

					# Obtain packages from our RPM repository.
					MOCK_CHROOT_CONFIG="$(get_extra_repository "redhat" "${l_DIST}" "${l_CODENAME}" "${COMPONENT}" "${PROJECT}" "x86_64")"
					if mock --buildsrpm \
					          ${MOCK_CHROOT_CONFIG} \
					          --resultdir="$PKGDIST/$l_DIST/$l_CODENAME/rpmbuild/SRPMS" \
					          --spec "$PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/rpmbuild/SOURCES/$PROJECT.spec" \
					          --sources "$PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/rpmbuild/SOURCES/"; then
						cat "$PKGDIST/$l_DIST/$l_CODENAME/rpmbuild/SRPMS/build.log"
						rm -Rf "$PKGDIST/$l_DIST/$l_CODENAME/rpmbuild/SRPMS/build.log"
					else
						cat $PKGDIST/$l_DIST/$l_CODENAME/rpmbuild/SRPMS/build.log
						rm -Rf "$TEMP_DIR"
						exit -1
					fi
				fi

				# clean up the Git clone from the temp folder
				cd && rm $TEMP_DIR/$PROJECT -Rf

				# modify changelog for this build
				### TODO: add changelog entry for this automatic build

				mkdir -p $PKGDIST/$l_DIST/$l_CODENAME/{x86_64,i386,SRPM}

				if [ "x$SKIP_ARCH" != "xx86_64" ] || [ "$IS_NOARCH" = "yes" ]; then
					if [ "x$l_DIST" = "xopensuse" ] || [ "x$l_DIST" = "xsle" ]; then
						BUILD_RESULT=/home/abuild/rpmbuild/
						if [ "x$l_DIST" = "xopensuse" ]; then
							DOWNLOAD_URL=$(echo "$OPENSUSE_DOWNLOAD_URL" | sed "s/#VERSION#/$l_CODENAME/")
						elif [ "x$l_DIST" = "xsle" ]; then
							DOWNLOAD_URL=$(echo "$SLE_DOWNLOAD_URL" | sed "s/#VERSION#/$l_CODENAME/")
							if [ "$l_CODENAME" = "11.2" ] || [ "$l_CODENAME" = "11.3" ]; then
								BUILD_RESULT=/usr/src/packages
							fi
						fi
						while ps ax | grep -E "build.*/var/cache/obs-build/$l_DIST/$l_CODENAME/x86_64/" | grep "sudo obs"; do
							echo "Waiting for some other build to finish..."
							sleep 30
						done

						# Obtain packages from our RPM repository.
						OTHERMIRROR="$(get_extra_repository "suse" "${l_DIST}" "${l_CODENAME}" "${COMPONENT}" "${PROJECT}" "x86_64")"
						if sudo obs-build \
						             --nosignature \
						             ${OTHERMIRROR} \
						             --repo "$DOWNLOAD_URL" \
						             --root "/var/cache/obs-build/$l_DIST/$l_CODENAME/x86_64/" \
						             --clean \
						             $PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/rpmbuild/SOURCES/$PROJECT.spec; then
							mkdir -p "$PKGDIST/$l_DIST/$l_CODENAME/x86_64/"
							find "/var/cache/obs-build/$l_DIST/$l_CODENAME/x86_64/$BUILD_RESULT/RPMS/" -type f | egrep '.*\.rpm$' | egrep -v '.*\.src\.rpm$' | while read rpmfile; do
								cp "$rpmfile" "$PKGDIST/$l_DIST/$l_CODENAME/x86_64/"
							done
							rpmsign-unattended -D "%_gpg_name debian@x2go.org" --addsign "$PKGDIST/$l_DIST/$l_CODENAME/x86_64/"*.rpm

							# also copy and sign source RPM's
							find "/var/cache/obs-build/$l_DIST/$l_CODENAME/x86_64/$BUILD_RESULT/SRPMS/" -type f | egrep '.*\.rpm$' | while read rpmfile; do
								cp "$rpmfile" "$PKGDIST/$l_DIST/$l_CODENAME/SRPM/"
							done
							rpmsign-unattended -D "%_gpg_name debian@x2go.org" --addsign "$PKGDIST/$l_DIST/$l_CODENAME/SRPM/"*.rpm
						else
							rm -Rf "$TEMP_DIR"
							exit -1
						fi
					else
						rm -f $PKGDIST/$l_DIST/$l_CODENAME/x86_64/build.log
						while [ -d ~mock/${l_DIST}-${l_CODENAME}-x86_64 ]; do
							echo "Waiting for some other build to finish..."
							sleep 30
						done

						# Obtain packages from our RPM repository.
						MOCK_CHROOT_CONFIG="$(get_extra_repository "redhat" "${l_DIST}" "${l_CODENAME}" "${COMPONENT}" "${PROJECT}" "x86_64")"
						ls $PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/rpmbuild/SRPMS/$PROJECT-$UPSTREAM_VERSION-$PKG_SRCRELEASE.$IS_RELEASE.git$DATE.$GITREV.$COMPONENT.*.src.rpm | while read srpm; do
							if mock ${MOCK_CHROOT_CONFIG} --resultdir="$PKGDIST/$l_DIST/$l_CODENAME/x86_64" "$srpm"; then
								# copy and later sign source RPM
								cp "$srpm" "$PKGDIST/$l_DIST/$l_CODENAME/SRPM/"

								# Clean up source RPM files. We copy them manually.
								find "${PKGDIST}/${l_DIST}/${l_CODENAME}/x86_64" -type 'f' -iname '*.src.rpm' -exec rm -f '{}' \;

								if [ "$l_DIST" = "epel" ] && [ "$l_CODENAME" = "5" ]; then
									# References:
									# /usr/lib/rpm/macros
									# http://adminotes.blogspot.fr/2011/12/centos-6-rpm-sign-problem-v4-signatures.html
									RPMMACRO_V3SIGN="%__gpg_sign_cmd %{__gpg} /usr/bin/gpg --force-v3-sigs --digest-algo=sha1 --batch --no-verbose --no-armor --passphrase-fd 3 --no-secmem-warning -u \"%{_gpg_name}\" -sbo %{__signature_filename} %{__plaintext_filename}"
									rpmsign-unattended -D "%_gpg_name debian@x2go.org" -D "$RPMMACRO_V3SIGN" --addsign $PKGDIST/$l_DIST/$l_CODENAME/x86_64/*.rpm
									rpmsign-unattended -D "%_gpg_name debian@x2go.org" -D "$RPMMACRO_V3SIGN" --addsign $PKGDIST/$l_DIST/$l_CODENAME/SRPM/*.rpm
								else
									rpmsign-unattended -D "%_gpg_name debian@x2go.org" --addsign $PKGDIST/$l_DIST/$l_CODENAME/x86_64/*.rpm
									rpmsign-unattended -D "%_gpg_name debian@x2go.org" --addsign $PKGDIST/$l_DIST/$l_CODENAME/SRPM/*.rpm
								fi
								cat $PKGDIST/$l_DIST/$l_CODENAME/x86_64/build.log
							else
								cat $PKGDIST/$l_DIST/$l_CODENAME/x86_64/build.log
								rm -Rf "$TEMP_DIR"
								exit -1
							fi
						done
					fi
				fi
				if [ "x$SKIP_ARCH" != "xi386" ] && [ "$IS_NOARCH" != "yes" ]; then
					if [ "x$l_DIST" = "xopensuse" ] || [ "x$l_DIST" = "xsle" ]; then
						BUILD_RESULT=/home/abuild/rpmbuild/
						if [ "x$l_DIST" = "xopensuse" ]; then
							DOWNLOAD_URL=$(echo "$OPENSUSE_DOWNLOAD_URL" | sed "s/#VERSION#/$l_CODENAME/")
						elif [ "x$l_DIST" = "xsle" ]; then
							DOWNLOAD_URL=$(echo "$SLE_DOWNLOAD_URL" | sed "s/#VERSION#/$l_CODENAME/")
							if [ "$l_CODENAME" = "11.2" ] || [ "$l_CODENAME" = "11.3" ]; then
								BUILD_RESULT=/usr/src/packages
							fi
						fi
						while ps ax | grep -E "build.*/var/cache/obs-build/$l_DIST/$l_CODENAME/i386/" | grep "sudo obs"; do
							echo "Waiting for some other build to finish..."
							sleep 30
						done

						# Obtain packages from our RPM repository.
						OTHERMIRROR="$(get_extra_repository "suse" "${l_DIST}" "${l_CODENAME}" "${COMPONENT}" "${PROJECT}" "i386")"
						if linux32 sudo obs-build \
						                    --nosignature \
						                    ${OTHERMIRROR} \
						                    --repo "$DOWNLOAD_URL" \
						                    --root "/var/cache/obs-build/$l_DIST/$l_CODENAME/i386/" \
						                    --clean \
						                    $PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/rpmbuild/SOURCES/$PROJECT.spec; then
							mkdir -p "$PKGDIST/$l_DIST/$l_CODENAME/i386/"
							find "/var/cache/obs-build/$l_DIST/$l_CODENAME/i386/$BUILD_RESULT/RPMS/" -type f | egrep '.*\.rpm$' | egrep -v '.*\.src\.rpm$' | while read rpmfile; do
								cp "$rpmfile" "$PKGDIST/$l_DIST/$l_CODENAME/i386/"
							done
							rpmsign-unattended -D "%_gpg_name debian@x2go.org" --addsign "$PKGDIST/$l_DIST/$l_CODENAME/i386/"*.rpm

							# copy and later sign source RPM's, if needed (that is, not already generated by x86_64/noarch code above)
							SEARCH_SRPM="$(find "$PKGDIST/$l_DIST/$l_CODENAME/SRPM" -type 'f' -name "*.src.rpm" -print)"
							if [ -z "$SEARCH_SRPM" ]; then
								find "/var/cache/obs-build/$l_DIST/$l_CODENAME/i386/$BUILD_RESULT/SRPMS/" -type 'f' | egrep '.*\.src\.rpm$' | while read rpmfile; do
									cp "$rpmfile" "$PKGDIST/$l_DIST/$l_CODENAME/SRPM/"
								done
								rpmsign-unattended -D "%_gpg_name debian@x2go.org" --addsign "$PKGDIST/$l_DIST/$l_CODENAME/SRPM/"*.rpm
							fi
						else
							rm -Rf "$TEMP_DIR"
							exit -1
						fi
					else
						while [ -d ~mock/${l_DIST}-${l_CODENAME}-i386 ]; do
							echo "Waiting for some other build to finish..."
							sleep 30
						done
						rm -f $PKGDIST/$l_DIST/$l_CODENAME/i386/build.log

						# Obtain packages from our RPM repository.
						MOCK_CHROOT_CONFIG="$(get_extra_repository "redhat" "${l_DIST}" "${l_CODENAME}" "${COMPONENT}" "${PROJECT}" "i386")"
						ls $PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH/rpmbuild/SRPMS/$PROJECT-$UPSTREAM_VERSION-$PKG_SRCRELEASE.$IS_RELEASE.git$DATE.$GITREV.$COMPONENT.*.src.rpm | while read srpm; do
							if nice mock ${MOCK_CHROOT_CONFIG} --resultdir="$PKGDIST/$l_DIST/$l_CODENAME/i386" "$srpm"; then
								# only copy and sign source RPM if necessary
								SIGN_SRPM=0
								if [ ! -e "$PKGDIST/$l_DIST/$l_CODENAME/SRPM/$(basename "$srpm")" ]; then
									cp "$srpm" "$PKGDIST/$l_DIST/$l_CODENAME/SRPM/"
									SIGN_SRPM=1
								fi

								# Clean up source RPM files. We copy them manually.
								find "${PKGDIST}/${l_DIST}/${l_CODENAME}/i386" -type 'f' -iname '*.src.rpm' -exec rm -f '{}' \;

								if [ "$l_DIST" = "epel" ] && [ "$l_CODENAME" = "5" ]; then
									RPMMACRO_V3SIGN="%__gpg_sign_cmd /usr/bin/gpg --force-v3-sigs --digest-algo=sha1 --batch --no-verbose --no-armor --passphrase-fd 3 --no-secmem-warning -u \"%_gpg_name\" -sbo %{__signature_filename} %{__plaintext_filename}"
									rpmsign-unattended -D "%_gpg_name debian@x2go.org" -D "$RPMMACRO_V3SIGN" --addsign $PKGDIST/$l_DIST/$l_CODENAME/i386/*.rpm
									[ "x$SIGN_SRPM" = "x1" ] && rpmsign-unattended -D "%_gpg_name debian@x2go.org" -D "$RPMMACRO_V3SIGN" --addsign $PKGDIST/$l_DIST/$l_CODENAME/SRPM/*.rpm
								else
									rpmsign-unattended -D "%_gpg_name debian@x2go.org" --addsign $PKGDIST/$l_DIST/$l_CODENAME/i386/*.rpm
									[ "x$SIGN_SRPM" = "x1" ] && rpmsign-unattended -D "%_gpg_name debian@x2go.org" --addsign $PKGDIST/$l_DIST/$l_CODENAME/i386/*.rpm
								fi
								cat $PKGDIST/$l_DIST/$l_CODENAME/i386/build.log
							else
								cat $PKGDIST/$l_DIST/$l_CODENAME/i386/build.log
								rm -Rf "$TEMP_DIR"
								exit -1
							fi
						done
					fi
				fi
			done
		}
	done
	rm -Rf "$TEMP_DIR"
	return 0
}

upload_packages() {
	# dupload the new packages to the reprepro repository

	echo "$RPM_BUILD_FOR" | sed -e 's/ /\n/g' | while read line; do
		l_DIST="$(echo ${line/: /:} | cut -d":" -f1 | tr [:upper:] [:lower:])"
		l_CODENAMES="${CODENAMES:-$(echo ${line/: /:} | cut -d":" -f2- | sed -e 's/,/ /g' | tr [:upper:] [:lower:])}"
		for l_CODENAME in $l_CODENAMES; do

			test -z $CODENAMES || echo $line | grep $CODENAMES || break

			# Yes, "SRPM" is technically not an architecture.
			for l_ARCH in x86_64 i386 SRPM; do
				if [ "x$SKIP_ARCH" != "x$l_ARCH" ]; then

					# create remote directories in archive
					0</dev/null ssh $REPOS_SERVER mkdir -p $RPM_REPOS_BASE/$l_DIST/$l_CODENAME/$COMPONENT/$l_ARCH/rpms/$PROJECT
					0</dev/null ssh $REPOS_SERVER mkdir -p $RPM_REPOS_BASE/$l_DIST/$l_CODENAME/$COMPONENT/$l_ARCH/repodata

					# remove rpm packages of the same name (pattern)
					0</dev/null ssh $REPOS_SERVER rm -f $RPM_REPOS_BASE/$l_DIST/$l_CODENAME/$COMPONENT/$l_ARCH/rpms/$PROJECT/*.rpm

					# copy (s)rpms into repo
					cd "$PKGDIST/$l_DIST/$l_CODENAME/$l_ARCH"
					scp *.rpm $REPOS_SERVER:$RPM_REPOS_BASE/$l_DIST/$l_CODENAME/$COMPONENT/$l_ARCH/rpms/$PROJECT/ || true

					CREATEREPO_OPTS=""
					if [ "$l_DIST" = "epel" ] && [ "$l_CODENAME" = "5" ]; then
						CREATEREPO_OPTS="-s sha"
					fi
					0</dev/null ssh $REPOS_SERVER "cd $RPM_REPOS_BASE/$l_DIST/$l_CODENAME/$COMPONENT/$l_ARCH/ && createrepo ${CREATEREPO_OPTS} ."

					0</dev/null ssh $REPOS_SERVER "cd $RPM_REPOS_BASE/$l_DIST/$l_CODENAME/$COMPONENT/$l_ARCH/repodata &&  rm -f repomd.xml.asc && gpg -a -u ${GPG_KEY} --detach-sign repomd.xml" 1>/dev/null 2>/dev/null
					0</dev/null ssh $REPOS_SERVER "cd $RPM_REPOS_BASE/$l_DIST/$l_CODENAME/$COMPONENT/$l_ARCH/repodata && test -e repomd.xml.key || gpg -a --output repomd.xml.key --export ${GPG_KEY} "

				fi
			done
		done
	done
	return 0
}

wait_for_lock() {
	while [ -f $LOCK_FILE ]; do
		pid=$(head -n1 $LOCK_FILE)
		if ! ps $pid 1>/dev/null; then rm -f $LOCK_FILE
		else
			echo "PROJECT directory is locked, sleeping for 10 seconds..."
			sleep 10
		fi
	done
}

lock_workspace() {
	wait_for_lock
	echo $$ > $LOCK_FILE
}

unlock_workspace() {
	rm -f $LOCK_FILE
}

delay_build() {
	sleep $[ ( ( $RANDOM % 10 )  + 1 ) * 10 ]s
}


### MAIN ###
set_vars $@ && {
	if [ "x$(basename $0)" = "x$PREFIX-build-rpm-package" ] || [ "x$(basename $0)" = "x$PREFIX-build+upload-rpm-package" ]; then
								# Treat any value other than "no" and "0" as true.
		cd $PROJECT_DIR && pkgneedsbuild $CHECKOUT || ( [ "x$FORCE_BUILD" != "xno" ] && [ "x$FORCE_BUILD" != "x0" ] ) && {
			if [ "x$FORCE_BUILD" != "xno" ] && [ "x$FORCE_BUILD" != "x0" ] && ( [ "x$NO_DELAY" = "xno" ] || [ "x$NO_DELAY" = "x0" ] ); then
				delay_build
			fi
			lock_workspace
			prepare_workspace && {
				unlock_workspace
				clear_pkgdist
				build_packages
			}
			unlock_workspace
		}
	fi
	if [ "x$(basename $0)" = "x$PREFIX-upload-rpm-package" ] || [ "x$(basename $0)" = "x$PREFIX-build+upload-rpm-package" ]; then
		upload_packages
	fi
}