build/prefetch: add a script to load compiled base/kernel

In most cases, one wants to skip building the sources and go straight
for packages and all...

Makefile

@@ -1,5 +1,5 @@
-STEPS=		base clean core distfiles kernel \
-		iso memstick nano plugins ports \
+STEPS=		base clean core distfiles kernel iso \
+		memstick nano plugins ports prefetch \
 		rebase regress release skim
 .PHONY:		${STEPS}
 

README.md

@@ -135,6 +135,10 @@ distribution files before running the actual build:
 
     # make distfiles
 
+Compiled base and kernel sets can be prefetched from a mirror:
+
+    # make prefetch VERSION=version.to.prefetch
+
 Core packages (pristine copies) can be batch-built using:
 
     # make core-<repo_branch_or_tag>[,...]

build/prefetch.sh

@@ -0,0 +1,41 @@
+#!/bin/sh
+
+# Copyright (c) 2016 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 && $(${SCRUB_ARGS})
+
+MIRROR="https://pkg.opnsense.org/sets"
+
+sh ./clean.sh base kernel
+
+URL="${MIRROR}/base-${PRODUCT_VERSION}-${ARCH}"
+fetch -o ${SETSDIR} ${URL}.obsolete
+fetch -o ${SETSDIR} ${URL}.txz
+
+URL="${MIRROR}/kernel-${PRODUCT_VERSION}-${ARCH}"
+fetch -o ${SETSDIR} ${URL}.txz