new place for common custom buildroot packages (like mruby), and fix tzdata.

* mruby is a test package for now, but it can now be configured from all the systems.
* tzdata fixed
   * tzdata's default behavior is to download a file randomly to its `:code.priv_dir`  (which is read-only), now we dont download it ever
   * we needed the files it _would_ download, so i packaged them into `farmbot_system`'s priv dir, then copy it to `/tmp/` (which is read-write) at every boot.

Makefile

@@ -13,7 +13,7 @@ prod_env:
 
 clean:
 	$(info Cleaning)
-	rm -rf apps/NERVES_SYSTEM_*
+	# rm -rf apps/NERVES_SYSTEM_*
 	rm -rf apps/farmbot/_images
 	rm -rf deps
 	rm -rf _build
@@ -109,4 +109,4 @@ release-rpi2: rpi2
 ## end rpi2 portion.
 
 ## Release will build all the systems.
-release: clean  release-rpi release-rpi3 release-rpi2
+release: clean  release-rpi release-rpi3 release-rpi2

apps/farmbot/config/prod.exs

@@ -3,3 +3,5 @@ config :nerves, :firmware,
   rootfs_additions: "config/hardware/#{Mix.Project.config[:target]}/rootfs-additions"
 
 config :farmbot_configurator, port: 80
+config :tzdata, :data_dir, "/tmp"
+config :tzdata, :autoupdate, :disabled

apps/farmbot/mix.exs

@@ -59,16 +59,16 @@ defmodule Farmbot.Mixfile do
       :rsa,
       :runtime_tools,
       :mustache,
-      :timex,
       :vmq_commons,
       :amnesia,
-      :quantum,
       :gen_stage,
       :nerves,
       :"farmbot_system_#{target(Mix.env)}",
       :farmbot_system,
       :farmbot_auth,
       :farmbot_configurator,
+      :quantum, # Quantum needs to start AFTER farmbot_system, so we can set up its dirs
+      :timex, # Timex needs to start AFTER farmbot_system, so we can set up its dirs
    ]
   end
 

apps/farmbot_system_nerves_common/lib/farmbot_system_fs_nerves.ex

@@ -12,6 +12,7 @@ defmodule Farmbot.System.NervesCommon.FileSystem do
     block_device: block_device)
   do
     quote do
+      require Logger
       # mount -t ext4 -o ro,remount /dev/mmcblk0p3 /state
 
       @doc false
@@ -31,6 +32,25 @@ defmodule Farmbot.System.NervesCommon.FileSystem do
           # If not, we are fine. continue
           _ -> :ok
         end
+
+        :ok = tzdata_hack()
+      end
+
+      @doc """
+        This needs to happen because tzdata by default polls and downloads
+        things to its release dir, which is read only in nerves environments.
+        to fix this we bundle the file it would normally download, and package
+        it into farmbot_system, then copy it to a configured dir for tzdata to
+        use because /tmp is read-write, we will just copy it there at every
+        boot becase its easier.
+      """
+      def tzdata_hack() do
+        Logger.debug ">> Hacking tzdata..."
+        # File.cp "#{:code.priv_dir(:tzdata)}/release_ets/2016j.ets", "/tmp"
+        File.mkdir "/tmp/release_ets"
+        File.cp_r "#{:code.priv_dir(:farmbot_system)}/release_ets/2016j.ets", "/tmp/release_ets/2016j.ets"
+        Logger.debug ">> Hacked!"
+        :ok
       end
 
       @doc false

apps/nerves_packages_farmbot/.gitignore

@@ -0,0 +1,7 @@
+/_build
+/cover
+/deps
+erl_crash.dump
+*.ez
+build.log
+.nerves

apps/nerves_packages_farmbot/Config.in

@@ -0,0 +1 @@
+source "$NERVES_DEFCONFIG_DIR/../nerves_packages_farmbot/package/mruby/Config.in"

apps/nerves_packages_farmbot/mix.exs

@@ -0,0 +1,41 @@
+defmodule NervesPackagesFarmbot.Mixfile do
+  use Mix.Project
+
+  @version Path.join([__DIR__, "..", "farmbot", "VERSION"])
+  |> File.read!
+  |> String.strip
+
+
+  def project do
+    [app: :nerves_packages_farmbot,
+     version: @version,
+     elixir: "~> 1.4",
+     archives: [nerves_bootstrap: "~> 0.2.1"],
+     aliases: ["deps.precompile": ["nerves.env", "deps.precompile"]],
+     compilers: Mix.compilers ++ [:nerves_package],
+     description: description(),
+     package: package(),
+     lockfile: "../../mix.lock",
+     deps: deps()]
+  end
+
+  def application, do: []
+
+  defp deps do
+    [{:nerves, "~> 0.4.0"},
+     {:nerves_system_br, "~> 0.8.1"}]
+  end
+
+  defp description do
+    """
+    Buildroot packages common to Farmbot
+    """
+  end
+
+  defp package do
+    [maintainers: ["Connor Rigby"],
+    files: ["mix.exs", "Config.in", ".gitignore"],
+     licenses: ["MIT"],
+     links: %{"Github" => "https://github.com/farmbot/farmbot_os"}]
+  end
+end

apps/nerves_system_rpi/Config.in

@@ -2,3 +2,4 @@
 #
 # If these are non-proprietary, please consider contributing them back to
 # Nerves or Buildroot.
+source "$NERVES_DEFCONFIG_DIR/../nerves_packages_farmbot/Config.in"

apps/nerves_system_rpi/nerves_defconfig

@@ -77,3 +77,4 @@ BR2_PACKAGE_ERLANG_HISTORY=y
 BR2_PACKAGE_NERVES_CONFIG=y
 BR2_PACKAGE_NERVES_CONFIG_NO_ERLINIT_CONF=y
 BR2_PACKAGE_NERVES_CONFIG_APPS="crypto"
+BR2_PACKAGE_MRUBY=y

apps/nerves_system_rpi2/Config.in

@@ -2,3 +2,4 @@
 #
 # If these are non-proprietary, please consider contributing them back to
 # Nerves or Buildroot.
+source "$NERVES_DEFCONFIG_DIR/../nerves_packages_farmbot/Config.in"

apps/nerves_system_rpi2/nerves_defconfig

@@ -72,3 +72,4 @@ BR2_PACKAGE_ERLANG_HISTORY=y
 BR2_PACKAGE_NERVES_CONFIG=y
 BR2_PACKAGE_NERVES_CONFIG_NO_ERLINIT_CONF=y
 BR2_PACKAGE_NERVES_CONFIG_APPS="crypto"
+BR2_PACKAGE_MRUBY=y

apps/nerves_system_rpi3/Config.in

@@ -1 +1 @@
-source "$NERVES_DEFCONFIG_DIR/package/mruby/Config.in"
+source "$NERVES_DEFCONFIG_DIR/../nerves_packages_farmbot/Config.in"