Add firstboot provisioning

ctl.sh

@@ -1,17 +1,45 @@
 #!/usr/bin/env bash
 
 function info {
-  echo "PI-Lab Utils"
+  echo "Lab Utils"
 }
 
 function build {
   function image {
+    local image_config=${1:-$(ls  packer | fzf)}
+    [[ -z "$image_config" ]] && die "Config not found"
     docker run --rm --privileged \
       -v /dev:/dev \
       -v ${PWD}:/build mkaczanowski/packer-builder-arm:latest \
-      build packer/raspios.pkr.hcl
+      build packer/${image_config}
   }
   ${@:-info}
 }
 
+function flash {
+  local input_file=${1:-raspios-arm64.img}
+  local output_file=${2:-$(lsblk -d -o NAME | fzf --height=10 --prompt="Select a block device: " | sed 's/^/\/dev\//')}
+
+  [[ -z "$input_file" ]] && die "No device image selected."
+  [[ -z "$output_file" ]] && die "No block device selected."
+
+  confirm "Flash ${input_file} to ${output_file}?" && {
+    echo "Proceeding..."
+    sudo dd if=${input_file} of=${output_file} bs=4M status=progress oflag=sync
+  } || {
+    echo "Aborting."
+    exit 1
+  }
+}
+
+function confirm {
+  read -p "$1 (Y/N): " -n 1 -r; echo
+  [[ $REPLY =~ ^[Yy]$ ]]
+}
+
+function die {
+  echo "$1" >&2
+  exit 1
+}
+
 ${@:-info}