clearfog: fancy flashing
There's no need to use emergency.target anymore, the `run usbboot` (or
its longer equivalent if we're in Marvell's factory U-Boot) will perform
the flashing automatically.
It's a bit complex because one has to wait for /dev/sda1 to appear
first. That needs udev to be running. Then one has to mount the image.
In the end I decided to go for a unit generator because it is not clear
whether the actual .device unit is just `dev-sda1.unit` or something
much more interesting like `sys-devices-platform-soc-soc:internal\x2dregs-f10f8000.usb3-usb2-2\x2d1-2\x2d1:1.0-host4-target4:0:0-4:0:0:0-block-sda-sda1.device`.
Change-Id: I1d1bc64e453c94c568cb84bc52f61dafa2a3b15d
diff --git a/package/czechlight-rauc/czechlight-usb-flash-mount-generator b/package/czechlight-rauc/czechlight-usb-flash-mount-generator
new file mode 100644
index 0000000..67cdf10
--- /dev/null
+++ b/package/czechlight-rauc/czechlight-usb-flash-mount-generator
@@ -0,0 +1,18 @@
+#!/bin/sh
+
+grep -q systemd.unit=usb-flash.service /proc/cmdline || exit 0
+
+cat > $1/mnt.mount <<EOF
+[Unit]
+Description=Mount USB flash at /mnt
+DefaultDependencies=no
+Conflicts=umount.target
+Before=local-fs.target umount.target
+Requires=systemd-udevd.service
+
+[Mount]
+What=/dev/sda1
+Where=/mnt
+Type=auto
+Options=relatime,nosuid,nodev
+EOF