Class: Falcon::Configuration::Loader

Inherits:
Object
  • Object
show all
Defined in:
lib/falcon/configuration.rb

Overview

The domain specific language for loading configuration files.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(configuration, root = nil) ⇒ Loader

Initialize the loader, attached to a specific configuration instance. Any environments generated by the loader will be added to the configuration.



94
95
96
97
98
99
 
# File 'lib/falcon/configuration.rb', line 94

def initialize(configuration, root = nil)
	@loaded = {}
	@configuration = configuration
	@environments = {}
	@root = root
end

Instance Attribute Details

#configuration ⇒ Object (readonly)

The attached configuration instance.



107
108
109
 
# File 'lib/falcon/configuration.rb', line 107

def configuration
  @configuration
end

#root ⇒ Object (readonly)

The file-system root path which is injected into the environments as required.



103
104
105
 
# File 'lib/falcon/configuration.rb', line 103

def root
  @root
end

Class Method Details

.load_file(configuration, path) ⇒ Object

Load the specified file into the given configuration.



112
113
114
115
116
117
118
119
 
# File 'lib/falcon/configuration.rb', line 112

def self.load_file(configuration, path)
	path = File.realpath(path)
	root = File.dirname(path)
	
	loader = self.new(configuration, root)
	
	loader.instance_eval(File.read(path), path)
end

Instance Method Details

#environment(name, *parents, &block) ⇒ Object

Add the named environment, with zero or more parent environments, defined using the specified `block`.

Raises:

  • (KeyError) 


151
152
153
154
 
# File 'lib/falcon/configuration.rb', line 151

def environment(name, *parents, &block)
	raise KeyError.new("#{name} is already set", key: name) if @environments.key?(name)
	@environments[name] = merge(name, *parents, &block)
end

#host(name, *parents, &block) ⇒ Object

Define a host with the specified name. Adds `root` and `authority` keys.



159
160
161
162
163
164
165
166
 
# File 'lib/falcon/configuration.rb', line 159

def host(name, *parents, &block)
	environment = merge(name, *parents, &block)
	
	environment[:root] = @root
	environment[:authority] = name
	
	@configuration.add(environment.flatten)
end

#load(*features) ⇒ Object

Load specific features into the current configuration.

Falcon provides default environments for different purposes. These are included in the gem, in the `environments/` directory. This method loads the code in those files into the current configuration.



126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
 
# File 'lib/falcon/configuration.rb', line 126

def load(*features)
	features.each do |feature|
		next if @loaded.include?(feature)
		
		case feature
		when Symbol
			relative_path = File.join(__dir__, "environments", "#{feature}.rb")
			
			self.instance_eval(File.read(relative_path), relative_path)
			
			@loaded[feature] = relative_path
		when Module
			feature.load(self)
			
			@loaded[feature] = feature
		else
			raise LoadError, "Unsure about how to load #{feature}!"
		end
	end
end

#proxy(name, *parents, &block) ⇒ Object

Define a proxy with the specified name. Adds `root` and `authority` keys.



171
172
173
174
175
176
177
178
 
# File 'lib/falcon/configuration.rb', line 171

def proxy(name, *parents, &block)
	environment = merge(name, :proxy, *parents, &block)
	
	environment[:root] = @root
	environment[:authority] = name
	
	@configuration.add(environment.flatten)
end

#rack(name, *parents, &block) ⇒ Object

Define a rack application with the specified name. Adds `root` and `authority` keys.



183
184
185
186
187
188
189
190
 
# File 'lib/falcon/configuration.rb', line 183

def rack(name, *parents, &block)
	environment = merge(name, :rack, *parents, &block)
	
	environment[:root] = @root
	environment[:authority] = name
	
	@configuration.add(environment.flatten)
end

#supervisor(&block) ⇒ Object

Define a supervisor instance Adds `root` key.



194
195
196
197
198
199
200
201
 
# File 'lib/falcon/configuration.rb', line 194

def supervisor(&block)
	name = File.join(@root, "supervisor")
	environment = merge(name, :supervisor, &block)
	
	environment[:root] = @root
	
	@configuration.add(environment.flatten)
end