build/configure: persistent build options

Inspired by: Shawn Webb's HardenedBSD patches

.gitignore

@@ -0,0 +1 @@
+/config/build.conf

build/common.sh

@@ -27,6 +27,13 @@
 
 set -e
 
+BUILD_CONF=../config/build.conf
+
+# load previous settings
+if [ -f ${BUILD_CONF} ]; then
+	. ${BUILD_CONF}
+fi
+
 # important build settings
 export PRODUCT_VERSION=${PRODUCT_VERSION:-$(date '+%Y%m%d%H%M')}
 export PRODUCT_FLAVOUR=${PRODUCT_FLAVOUR:-"OpenSSL"}
@@ -67,7 +74,17 @@ export VGAIMG="${IMAGESDIR}/${PRODUCT_RELEASE}-vga-${ARCH}.img"
 export NANOIMG="${IMAGESDIR}/${PRODUCT_RELEASE}-nano-${ARCH}.img"
 
 # print environment to showcase all of our variables
-env
+env | sort
+
+setup_env()
+{
+	rm -f ${BUILD_CONF}
+
+	# these variables are allowed to steer the build
+	[ -n "${1}" ] && echo "export PRODUCT_NAME=${1}" >> ${BUILD_CONF}
+	[ -n "${2}" ] && echo "export PRODUCT_FLAVOUR=${2}" >> ${BUILD_CONF}
+	[ -n "${3}" ] && echo "export PRODUCT_VERSION=${3}" >> ${BUILD_CONF}
+}
 
 git_clear()
 {

build/configure.sh

@@ -0,0 +1,50 @@
+#!/bin/sh
+
+# Copyright (c) 2015 Franco Fichtner <franco@opnsense.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+
+set -e
+
+. ./common.sh
+
+while getopts n:f:v: OPT; do
+	case ${OPT} in
+	f)
+		FLAVOUR=${OPTARG}
+		;;
+	n)
+		NAME=${OPTARG}
+		;;
+	v)
+		VERSION=${OPTARG}
+		;;
+	*)
+		echo "Usage: configure.sh [-f flavour] [-n name] [-v version]" >&2
+		exit 1
+		;;
+	esac
+done
+
+setup_env "${NAME}" "${FLAVOUR}" "${VERSION}"