list all possible environments

Rakefile

@@ -1,6 +1,7 @@
 $LOAD_PATH << 'lib'
 
 require 'rubygems'
+require 'yaml'
 
 require 'apache'
 require 'spec/rake/spectask'

lib/apache/rake/create.rb

@@ -1,16 +1,16 @@
 require 'fileutils'
+require 'yaml'
 require 'apache/config'
 require 'apache/rake/create'
-require 'yaml'
 require 'rainbow'
 
+CONFIG = Hash[YAML.load_file('config.yml').collect { |k,v| [ k.to_sym, v ] }]
+
 namespace :apache do
   desc "Create all defined configs for the specified environment"
   task :create, :environment do |t, args|
     APACHE_ENV = (args[:environment] || 'production').to_sym
 
-    CONFIG = Hash[YAML.load_file('config.yml').collect { |k,v| [ k.to_sym, v ] }]
-
     CONFIG[:source_path] = File.expand_path(CONFIG[:source])
     CONFIG[:dest_path] = File.expand_path(CONFIG[:destination])
 
@@ -24,4 +24,13 @@ namespace :apache do
       require file
     end
   end
+
+  desc "List all possible environments"
+  task :environments do
+    CONFIG[:source_path] = File.expand_path(CONFIG[:source])
+
+    puts Dir[File.join(CONFIG[:source_path], '**', '*.rb')].collect { |file|
+      File.readlines(file).find_all { |line| line[%r{(if_environment|build_if)}] }.collect { |line| line.scan(%r{:[a-z_]+}) }
+    }.flatten.uniq.sort.collect { |name| name[1..-1] } * "\n"
+  end
 end