init

firmware/config/config.exs

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+# This file is responsible for configuring your application
+# and its dependencies with the aid of the Mix.Config module.
+#
+# This configuration file is loaded before any dependency and
+# is restricted to this project.
+use Mix.Config
+
+config :firmware, target: Mix.target()
+
+# Customize non-Elixir parts of the firmware. See
+# https://hexdocs.pm/nerves/advanced-configuration.html for details.
+
+config :nerves, :firmware, rootfs_overlay: "rootfs_overlay"
+
+# Use shoehorn to start the main application. See the shoehorn
+# docs for separating out critical OTP applications such as those
+# involved with firmware updates.
+
+config :shoehorn,
+  init: [:nerves_runtime, :nerves_init_gadget],
+  app: Mix.Project.config()[:app]
+
+# Use Ringlogger as the logger backend and remove :console.
+# See https://hexdocs.pm/ring_logger/readme.html for more information on
+# configuring ring_logger.
+
+config :logger, backends: [RingLogger]
+
+config :ui, UiWeb.Endpoint,
+  url: [host: "localhost"],
+  http: [port: 80],
+  secret_key_base: "HEY05EB1dFVSu6KykKHuS4rQPQzSHv4F7mGVB/gnDLrIu75wE/ytBXy2TaL3A6RA",
+  root: Path.dirname(__DIR__),
+  server: true,
+  render_errors: [view: UiWeb.ErrorView, accepts: ~w(html json)],
+  pubsub: [name: Nerves.PubSub, adapter: Phoenix.PubSub.PG2],
+  code_reloader: false
+
+config :phoenix, :json_library, Jason
+
+if Mix.target() != :host do
+  import_config "target.exs"
+end

firmware/config/target.exs

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+use Mix.Config
+
+# Authorize the device to receive firmware using your public key.
+# See https://hexdocs.pm/nerves_firmware_ssh/readme.html for more information
+# on configuring nerves_firmware_ssh.
+
+keys =
+  [
+    Path.join([System.user_home!(), ".ssh", "id_rsa.pub"]),
+    Path.join([System.user_home!(), ".ssh", "id_ecdsa.pub"]),
+    Path.join([System.user_home!(), ".ssh", "id_ed25519.pub"])
+  ]
+  |> Enum.filter(&File.exists?/1)
+
+if keys == [],
+  do:
+    Mix.raise("""
+    No SSH public keys found in ~/.ssh. An ssh authorized key is needed to
+    log into the Nerves device and update firmware on it using ssh.
+    See your project's config.exs for this error message.
+    """)
+
+config :nerves_firmware_ssh,
+  authorized_keys: Enum.map(keys, &File.read!/1)
+
+# Configure nerves_init_gadget.
+# See https://hexdocs.pm/nerves_init_gadget/readme.html for more information.
+
+# Setting the node_name will enable Erlang Distribution.
+# Only enable this for prod if you understand the risks.
+node_name = if Mix.env() != :prod, do: "firmware"
+
+config :nerves_init_gadget,
+  ifname: "usb0",
+  address_method: :dhcpd,
+  mdns_domain: "nerves.local",
+  node_name: node_name,
+  node_host: :mdns_domain
+
+# Import target specific config. This must remain at the bottom
+# of this file so it overrides the configuration defined above.
+# Uncomment to use target specific configurations
+
+# import_config "#{Mix.target()}.exs"