Initial rewrite to consolidate VM image build scripts into one.

There may be some very sharp edges here while refactoring.

 - Move amd64/mk-vmimage.sh -> scripts/mk-vmimage.sh.
 - Remove vm-base target from Makefile.vm.
 - In vm-image target, use getopts flags for argument passing.
 - Create tools/vmimage.subr, containing default and prototype
   for the following functions that are used to drive the build,
   run in this order:

   vm_install_base()
   vm_extra_install_base()
   vm_extra_install_packages()
   vm_extra_install_ports()
   vm_extra_enable_services()
   vm_extra_pre_umount()
   vm_create_disk()
   vm_extra_create_disk()

 - In tools/azure.conf, override:

   vm_extra_install_base()
   vm_extra_pre_umount()
   vm_extra_create_disk()

 - In tools/openstack.conf, override:

   vm_extra_install_base()
   vm_extra_pre_umount()

Sponsored by:	The FreeBSD Foundation

1 files changed, 150 insertions, 0 deletions

diff --git a/release/tools/vmimage.subr b/release/tools/vmimage.subr
new file mode 100644
index 0000000..622e0fc
--- /dev/null
+++ b/release/tools/vmimage.subr
@@ -0,0 +1,150 @@
+#!/bin/sh
+#
+# $FreeBSD$
+#
+#
+# Common functions for virtual machine image build scripts.
+#
+
+export PATH="/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin:/usr/local/sbin"
+trap "cleanup" INT QUIT TRAP ABRT TERM
+
+mkimg_bootcode="/boot/pmbr"
+mkimg_partitions="-p freebsd-boot/bootfs:=/boot/gptboot"
+mkimg_partitions="${mkimg_partitions} -p freebsd-swap/swapfs::1G"
+mkimg_partitions="${mkimg_partitions} freebsd-ufs/rootfs:=${VMBASE}"
+
+usage() {
+	echo "${0} usage:"
+	echo "${@}"
+	return 1
+}
+
+err() {
+	printf "${@}\n"
+	cleanup
+	return 1
+}
+
+cleanup() {
+	if [ ! -z "${mddev}" ]; then
+		mdconfig -d -u ${mddev}
+	fi
+	umount ${DESTDIR}/dev
+	umount ${DESTDIR}
+
+	return 0
+}
+
+vm_create_base() {
+	# Creates the UFS root filesystem for the virtual machine disk,
+	# written to the formatted disk image with mkimg(1).
+
+	mkdir -p ${DESTDIR}
+	truncate -s ${VMSIZE} ${VMBASE}
+	mddev=$(mdconfig -f ${VMBASE})
+	newfs -j /dev/${mddev}
+	mount /dev/${mddev} ${DESTDIR}
+
+	return 0
+}
+
+vm_install_base() {
+	# Installs the FreeBSD userland/kernel to the virtual machine disk.
+
+	cd ${WORLDDIR} && \
+		make DESTDIR=${DESTDIR} \
+		installworld installkernel distribution || \
+		err "\n\nCannot install the base system to ${DESTDIR}."
+
+	echo '# Custom /etc/fstab for FreeBSD VM images' \
+		> ${DESTDIR}/etc/fstab
+	echo '/dev/gpt/rootfs   /       ufs     rw      1       1' \
+		>> ${DESTDIR}/etc/fstab
+	echo '/dev/gpt/swapfs  none    swap    sw      0       0' \
+		>> ${DESTDIR}/etc/fstab
+
+	chroot ${DESTDIR} /usr/bin/newaliases
+	chroot ${DESTDIR} /etc/rc.d/ldconfig forcestart
+
+	return 0
+}
+
+vm_extra_install_base() {
+	# Prototype.  When overridden, runs extra post-installworld commands
+	# as needed, based on the target virtual machine image or cloud
+	# provider image target.
+
+	return 0
+}
+
+vm_extra_enable_services() {
+	if [ ! -z "${VM_RC_LIST}" ]; then
+		for _rcvar in ${VM_RC_LIST}; do
+			echo ${_rcvar}_enable="YES" >> ${DESTDIR}/etc/rc.conf
+		done
+	fi
+
+	return 0
+}
+
+vm_extra_install_packages() {
+	chroot ${DESTDIR} env ASSUME_ALWAYS_YES=yes \
+		/usr/sbin/pkg bootstrap -y
+	if [ ! -z "${VM_EXTRA_PACKAGES}" ]; then
+		chroot ${DESTDIR} env ASSUME_ALWAYS_YES=yes \
+			/usr/sbin/pkg install -y ${VM_EXTRA_PACKAGES}
+	fi
+
+	return 0
+}
+
+vm_extra_install_ports() {
+	# Prototype.  When overridden, installs additional ports within the
+	# virtual machine environment.
+
+	return 0
+}
+
+vm_umount_base() {
+	i=0
+	sync
+	while ! umount ${DESTDIR}/dev ${DESTDIR}; do
+		i=$(( $i + 1 ))
+		if [ $i -ge 10 ]; then
+			# This should never happen.  But, it has happened.
+			msg="Cannot umount(8) ${DESTDIR}\n"
+			msg="${msg}Something has gone horribly wrong."
+			err "${msg}"
+		fi
+		sleep 1
+	done
+
+	return 0
+}
+
+vm_create_disk() {
+	if [ -z "${mkimg_paritions}" ]; then
+		err "No partition types specified.  Skipping."
+		return 1
+	fi
+	echo "Creating image...  Please wait."
+	echo
+	mkimg -f ${mkimg_format} -s ${mkimg_scheme} \
+		${mkimg_bootcode} \
+		${mkimg_partitions} \
+		${mkimg_outfile}
+
+	mkimg 	-b /boot/pmbr -p freebsd-boot/bootfs:=/boot/gptboot \
+		-p freebsd-swap/swapfs::1G \
+		-p freebsd-ufs/rootfs:=${VMBASE} \
+		-o ${VMIMAGE}.raw
+
+	return 0
+}
+
+vm_extra_create_disk() {
+
+	return 0
+}
+