Use initramfs.dev only if exists and newer

Makefile

@@ -16,9 +16,16 @@ qemu_vm_ip = 10.2.2.10
 qemu_disk = tmp/qemu-disk.img
 qemu_target ?= debian-stretch
 qemu_kernel = $(qemu_target).linux
-qemu_initramfs = $(qemu_target).initramfs.dev
 qemu_torrent = $(qemu_target).torrent
 
+qemu_initramfs = $(shell \
+if [ -e $(qemu_target).initramfs.dev ] && [ `date -r $(qemu_target).initramfs.dev +%s` -gt `date -r $(qemu_target).initramfs +%s` ]; then \
+	echo "$(qemu_target).initramfs.dev"; \
+else \
+	echo "$(qemu_target).initramfs"; \
+fi \
+)
+
 .PHONY: default
 default: dockerimg images/debian-stretch.squashfs images/debian-stretch.torrent
 
@@ -101,6 +108,10 @@ tmp/tftproot/debian-installer/amd64/boot-screens/txt.cfg: txt.cfg
 /sys/devices/virtual/net/$(qemu_ifname_br)/brif/$(qemu_ifname_tap): /sys/devices/virtual/net/$(qemu_ifname_tap) /sys/devices/virtual/net/$(qemu_ifname_br)
 	sudo brctl addif $(qemu_ifname_br) $(qemu_ifname_tap)
 
+.PHONY: docker-services
+docker-services:
+	docker-compose up -d
+
 .PHONY: qemu-network
 qemu-network:  /sys/devices/virtual/net/$(qemu_ifname_br)/brif/$(qemu_ifname_tap)
 	if ! ip addr show dev $(qemu_ifname_br) | grep -F "$(qemu_host_ip)/$(qemu_netmask)"; then \
@@ -110,7 +121,7 @@ qemu-network:  /sys/devices/virtual/net/$(qemu_ifname_br)/brif/$(qemu_ifname_tap
 	sudo ip link set $(qemu_ifname_br) up
 
 .PHONY: qemu
-qemu: qemu-network $(qemu_disk)
+qemu: qemu-network $(qemu_disk) docker-services
 	qemu-system-x86_64 \
 		-kernel "images/$(qemu_kernel)" \
 		-initrd "images/$(qemu_initramfs)" \
@@ -121,7 +132,7 @@ qemu: qemu-network $(qemu_disk)
 		-net nic \
 		-net tap,ifname=$(qemu_ifname_tap),script=no,downscript=no
 
-.PHONY: qemu-tftp
+.PHONY: qemu-tftp docker-services
 qemu-tftp: tmp/tftproot tmp/tftproot/images tmp/tftproot/debian-installer/amd64/boot-screens/txt.cfg qemu-network $(qemu_disk)
 	qemu-system-x86_64 \
 		-net nic -net tap,ifname=$(qemu_ifname_tap),script=no,downscript=no \