Don't block waiting to initialize geoclue

README.md

@@ -18,8 +18,4 @@ Then you can run the program with
 crystal run src/gtktest.cr
 ```
 
-You can build for production with
-
-```
-shards build -Dpreview_mt --release --no-debug
-```
+You can build for production with `make` and install with `make install`

src/modules/api/location.cr

@@ -1,10 +1,27 @@
 module Wince::Location
   extend self
 
-  @@client = Geoclue::Simple.new_sync("space.quietfeathers.Wince", Geoclue::AccuracyLevel::Street, nil)
+  @@channel = Channel(Geoclue::Simple).new(1)
+  @@client : Geoclue::Simple? = nil
+  @@fiber : Fiber = spawn setup_client
 
-  def find_location()
-    location = @@client.location
-    [location.latitude, location.longitude]
+  def setup_client
+    @@channel.send Geoclue::Simple.new_sync("space.quietfeathers.Wince", Geoclue::AccuracyLevel::Street, nil)
+    Fiber.yield
+  end
+
+  # returns latlon if available, otherwise empty array
+  def find_location
+    if !@@fiber.dead?
+      return [] of Float64
+    end
+
+    if @@client.nil?
+      @@client = @@channel.receive
+    end
+
+    location = @@client.try do |c|
+      [c.location.latitude, c.location.longitude]
+    end || [] of Float64
   end
 end

src/modules/views/main.cr

@@ -62,7 +62,10 @@ module Wince
 
   def handle_geolocate
     latlon = Location.find_location()
-    LOCATION_ENTRY.text = "#{latlon[0]}, #{latlon[1]}"
+
+    if !latlon.empty?
+      LOCATION_ENTRY.text = "#{latlon[0]}, #{latlon[1]}"
+    end
   end
 
   def yelp_response_to_business_ids(response : JSON::Any)