build/compress: compression stage; closes #56

Makefile

@@ -23,10 +23,10 @@
 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 # SUCH DAMAGE.
 
-STEPS=		arm base boot chroot clean core distfiles download \
-		dvd info kernel nano plugins ports prefetch print \
-		rebase release rename serial sign skim test update \
-		upload verify vga vm xtools
+STEPS=		arm base boot chroot clean compress core distfiles download \
+		dvd info kernel nano plugins ports prefetch print rebase \
+		release rename serial sign skim test update upload verify \
+		vga vm xtools
 SCRIPTS=	batch nightly refresh pkg_fingerprint pkg_sign
 .PHONY:		${STEPS}
 

README.md

@@ -374,6 +374,14 @@ they can be printed selectively using:
 
     # make print-<variable1>[,<variable2>]
 
+Compressing images
+------------------
+
+For distribution images are compressed ussing bzip2(1).  This can
+be invoked manually using:
+
+    # make compress-<image1>[,<image2>]
+
 Composite build steps
 ---------------------
 

build/compress.sh

@@ -0,0 +1,45 @@
+#!/bin/sh
+
+# Copyright (c) 2018 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
+
+SELF=compress
+
+. ./common.sh
+
+for ARG in ${@}; do
+	case ${ARG} in
+	arm|dvd|nano|serial|vga|vm)
+		for FILE in $(find ${IMAGESDIR} -name \
+		    "*-${PRODUCT_FLAVOUR}-${ARG}-*" \! -name "*.bz2"); do
+			echo -n ">>> Compressing ${ARG} image... "
+			bzip2 ${FILE}
+			echo "done"
+		done
+		;;
+	esac
+done