Add persistent mac address for eth0

Author: longsleep

snappy/gadget/meta/hooks/prepare-device

@@ -1,5 +1,10 @@
 #!/bin/sh
 
-set -x
+set -ex
 
-# TODO(longsleep): pin eth0 mac address to uboot environment.
+# Pin eth0 mac address to uboot environment.
+
+MAC=$(cat /sys/class/net/eth0/address)
+cat <<EOF | /usr/bin/fw_setenv -s -
+ethaddr ${MAC}
+EOF

snappy/gadget/meta/snap.yaml

@@ -1,5 +1,5 @@
 name: pine64
-version: 16.04-2
+version: 16.04-3
 summary: Pine64 support package
 description: |
  Support files for booting Pine64

snappy/gadget/uboot.env.in

@@ -24,7 +24,7 @@ snappy_trial_boot=0
 
 console=ttyS0,115200
 mmcrootfstype=ext4 rootwait
-mmcargs=setenv bootargs console=${console} earlycon=uart,mmio32,0x01c28000 root=${mmcroot} rootfstype=${mmcrootfstype}
+mmcargs=setenv bootargs console=${console} earlycon=uart,mmio32,0x01c28000 root=${mmcroot} rootfstype=${mmcrootfstype} mac_addr=${ethaddr} sunxi_serial=${sunxi_serial}
 
 mmcbootcmd=run snappy_boot
 bootcmd=run mmcbootcmd