Add -A option so that one can pass in the URL of a APT Proxy (eg apt-cacher-ng) so that rebuilding is much faster

scripts/create_sibling.sh

@@ -17,6 +17,7 @@ OPT_PROVISION_ONLY=0
 OPT_CHECK_DEPS_ONLY=0
 OPT_IMAGE_PROVIDED=0
 OPT_RASPBIAN_VERSION='latest'
+OPT_APTPROXY=""
 
 SUPPORTED_RASPBIAN_VERSIONS=( 'latest' 'buster' 'stretch' )
 
@@ -111,6 +112,12 @@ function provision_raspbian() {
   set -eu
   export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
 
+  if [ ! -z "${OPT_APTPROXY}" ];
+  then
+	echo "[+] Using Proxy ${OPT_APTPROXY}"
+	echo "Acquire::http { Proxy \"${OPT_APTPROXY}\"; }" >/etc/apt/apt.conf.d/99pwnagotchi_proxy
+  fi
+
   uname -a
 
   apt-get -y update
@@ -226,8 +233,11 @@ EOF
   exit 0
 }
 
-while getopts ":n:i:o:s:v:dph" o; do
+while getopts "A:n:i:o:s:v:dph" o; do
   case "${o}" in
+    A)
+      OPT_APTPROXY="${OPTARG}"
+      ;;
     n)
       PWNI_NAME="${OPTARG}"
       ;;