Extract verify-configuration.sh from setup-teslausb

setup/pi/setup-teslausb

@@ -102,6 +102,12 @@ function check_available_space () {
   setup_progress "There is sufficient space available."
 }
 
+function verify_configuration () {
+  get_script /tmp verify-configuration.sh setup/pi
+  
+  /tmp/verify-configuration.sh
+}
+
 function get_script () {
   local local_path="$1"
   local name="$2"
@@ -195,9 +201,7 @@ headless_setup_progress_flash 1
 
 setup_progress "Verifying that the requested configuration is valid..."
 
-check_variable "campercent"
-
-check_available_space
+verify_configuration
 
 # Flash for Stage 3 headless (grab scripts)
 headless_setup_progress_flash 2

setup/pi/verify-configuration.sh

@@ -0,0 +1,28 @@
+#!/bin/bash -eu
+
+function check_variable () {
+  local var_name="$1"
+  if [ -z "${!var_name+x}" ]
+  then
+    setup_progress "STOP: Define the variable $var_name like this: export $var_name=value"
+    exit 1
+  fi
+}
+
+function check_available_space () {
+  setup_progress "Verifying that there is sufficient space available on the MicroSD card..."
+
+  local available_space="$( parted -m /dev/mmcblk0 u b print free | tail -1 | cut -d ":" -f 4 | sed 's/B//g' )"
+
+  if [ "$available_space" -lt  4294967296 ]
+  then
+    setup_progress "STOP: The MicroSD card is too small."
+    exit 1
+  fi
+
+  setup_progress "There is sufficient space available."
+}
+
+check_variable "campercent"
+
+check_available_space