update envrc template and improve local dev tooling (#971)

Author: panentheos

.envrc.template

@@ -17,6 +17,25 @@ export API_V3_URL=https://api-dev-green.mbtace.com
 #export CHELSEA_BRIDGE_USERNAME=
 #export CHELSEA_BRIDGE_PASSWORD=
 
+# URL and access key for Watts. Required. The staging key can be found in the shared 1Password vault,
+# in the "Watts Staging API key" entry.
+export WATTS_URL=https://watts-staging.mbtace.com
+#export WATTS_API_KEY=
+
+# URL and access key for Screenplay. Required. API keys can be found in the shared 1Password vault,
+# search for "Screenplay"
+export SCREENPLAY_BASE_URL=https://screenplay-dev.mbtace.com
+#export SCREENPLAY_API_KEY=
+
+# Mapping of SCU names to hosts. Optional. Leave unset to skip sending messages to Scully, or uncomment
+# to use a locally running instance.
+#export SCU_IP_MAP="{\"*\": \"localhost:4010\"}"
+#export SCULLY_API_KEY=
+
 # URLs of the enhanced trip-update and vehicle-position feeds.
 #export TRIP_UPDATE_URL="https://s3.amazonaws.com/mbta-gtfs-s3/concentrate/TripUpdates_enhanced.json"
 #export VEHICLE_POSITIONS_URL="https://s3.amazonaws.com/mbta-gtfs-s3/concentrate/VehiclePositions_enhanced.json"
+
+# Comma seprated list of sign ids to run for debugging purposes. If specified, these signs processes
+# will be run in isolation to reduce log noise.
+#export ONLY_SIGN_IDS=lab_test_1

config/runtime.exs

@@ -26,7 +26,7 @@ if config_env() != :test do
     scully_api_key: System.get_env("SCULLY_API_KEY"),
     watts_url: System.get_env("WATTS_URL"),
     watts_api_key: System.get_env("WATTS_API_KEY"),
-    scu_ip_map: System.get_env("SCU_IP_MAP", "null") |> Jason.decode!(),
+    scu_ip_map: System.get_env("SCU_IP_MAP", "{}") |> Jason.decode!(),
     chelsea_bridge_password: System.get_env("CHELSEA_BRIDGE_PASSWORD"),
     chelsea_bridge_username: System.get_env("CHELSEA_BRIDGE_USERNAME"),
     number_of_http_updaters:
@@ -43,7 +43,12 @@ end
 
 if config_env() == :dev do
   config :realtime_signs,
-    sign_config_file: System.get_env("SIGN_CONFIG_FILE")
+    sign_config_file: System.get_env("SIGN_CONFIG_FILE"),
+    only_sign_ids:
+      (case System.get_env("ONLY_SIGN_IDS") do
+         nil -> nil
+         string -> String.split(string, ",")
+       end)
 end
 
 message_log_job =

lib/pa_ess/scu_updater.ex

@@ -39,9 +39,11 @@ defmodule PaEss.ScuUpdater do
     scu_ip_map = Application.get_env(:realtime_signs, :scu_ip_map)
     scully_api_key = Application.get_env(:realtime_signs, :scully_api_key)
 
-    if scu_ip_map do
+    address = scu_ip_map[scu_id] || scu_ip_map["*"]
+
+    if address do
       http_poster.post(
-        "http://#{Map.fetch!(scu_ip_map, scu_id)}#{path}",
+        "http://#{address}#{path}",
         body,
         [{"Content-type", "application/json"}, {"x-api-key", scully_api_key}],
         hackney: [pool: :arinc_pool]

lib/signs/supervisor.ex

@@ -8,7 +8,10 @@ defmodule Signs.Supervisor do
 
   @impl true
   def init(_init_arg) do
-    for sign_config <- Signs.Utilities.SignsConfig.children_config() do
+    only_sign_ids = Application.get_env(:realtime_signs, :only_sign_ids)
+
+    for sign_config <- Signs.Utilities.SignsConfig.children_config(),
+        !only_sign_ids or sign_config["id"] in only_sign_ids do
       sign_module =
         case sign_config do
           %{"type" => "realtime"} -> Signs.Realtime