warn and exit if there's no config at all

lib/app_config.rb

@@ -6,11 +6,16 @@ class AppConfig
 
   cattr_accessor :config_vars
   cattr_accessor :base_file_path
+  cattr_accessor :file_path
   
   def self.base_file_path
     @@base_file_path || File.join(Rails.root, "config", "app_base.yml")
   end
   
+  def self.file_path
+    @@file_path || File.join(Rails.root, "config", "app.yml")
+  end
+  
   def self.[](key)
     config_vars[key]
   end
@@ -38,8 +43,8 @@ class AppConfig
       $stderr.puts "OH NO! Required file #{base_file_path} doesn't exist! Did you move it?"
       all_envs = {}
     end
-    if File.exist? "#{Rails.root}/config/app.yml"
-      all_envs_custom = load_config_yaml "#{Rails.root}/config/app.yml"
+    if File.exist?(file_path)
+      all_envs_custom = load_config_yaml(file_path)
       all_envs.deep_merge!(all_envs_custom)
     elsif File.exist? "#{Rails.root}/config/app_config.yml"
       all_envs_custom = load_config_yaml "#{Rails.root}/config/app_config.yml"
@@ -51,6 +56,12 @@ class AppConfig
       end
     end
 
+    # Is there a config at all?
+    unless all_envs['default']
+      $stderr.puts "What did you do? There's no config at all!"
+      Process.exit(false)
+    end
+
     env = env.to_s
     if all_envs[env]
       self.config_vars = all_envs['default'].merge(all_envs[env]).symbolize_keys

spec/lib/app_config_spec.rb

@@ -32,11 +32,23 @@ describe AppConfig do
     end
     it "prints error if base file is missing" do
       AppConfig.base_file_path = "/no/such/file"
+      AppConfig.file_path = File.join(Rails.root, "config", "app_base.yml")
 
       AppConfig.load_config_for_environment(:test)
       $stderr.rewind
       $stderr.string.chomp.should_not be_blank
     end
+    it "prints error and exits if there's no config at all" do
+      AppConfig.base_file_path = "/no/such/file"
+      AppConfig.file_path = "/no/such/file"
+      
+      lambda {
+        AppConfig.load_config_for_environment(:test)
+      }.should raise_error SystemExit
+      
+      $stderr.rewind
+      $stderr.string.chomp.should_not be_blank
+    end
   end
   describe ".generate_pod_uri" do
     describe "when pod_url is prefixed with protocol" do
@@ -64,4 +76,4 @@ describe AppConfig do
       end
     end
   end
-end
+end