Add runit export format.

Fix #28

lib/foreman/cli.rb

@@ -42,6 +42,7 @@ class Foreman::CLI < Thor
       when "inittab" then Foreman::Export::Inittab
       when "upstart" then Foreman::Export::Upstart
       when "bluepill" then Foreman::Export::Bluepill
+      when "runit"    then Foreman::Export::Runit
       else error "Unknown export format: #{format}."
     end
 

lib/foreman/export.rb

@@ -8,3 +8,4 @@ require "foreman/export/base"
 require "foreman/export/inittab"
 require "foreman/export/upstart"
 require "foreman/export/bluepill"
+require "foreman/export/runit"

lib/foreman/export/runit.rb

@@ -0,0 +1,60 @@
+require "erb"
+require "foreman/export"
+
+class Foreman::Export::Runit < Foreman::Export::Base
+  ENV_VARIABLE_REGEX = /([a-zA-Z_]+[a-zA-Z0-9_]*)=(\S+)/
+  
+  def export(location, options={})
+    error("Must specify a location") unless location
+    
+    app = options[:app] || File.basename(engine.directory)
+    user = options[:user] || app
+    log_root = options[:log] || "/var/log/#{app}"
+    template_root = options[:template]
+    
+    concurrency = Foreman::Utils.parse_concurrency(options[:concurrency])
+    
+    run_template = export_template('runit', 'run.erb', template_root)
+    log_run_template = export_template('runit', 'log_run.erb', template_root)
+
+    engine.processes.each do |process|
+      1.upto(concurrency[process.name]) do |num|
+        process_directory     = "#{location}/#{app}-#{process.name}-#{num}"
+        process_env_directory = "#{process_directory}/env"
+        process_log_directory = "#{process_directory}/log"
+        
+        create_directory process_directory
+        create_directory process_env_directory
+        create_directory process_log_directory
+        
+        run = ERB.new(run_template).result(binding)
+        write_file "#{process_directory}/run", run
+        
+        port = engine.port_for(process, num, options[:port])
+        environment_variables = {'PORT' => port}.
+            merge(engine.environment).
+            merge(inline_variables(process.command))
+            
+        environment_variables.each_pair do |var, env|
+          write_file "#{process_env_directory}/#{var.upcase}", env
+        end
+        
+        log_run = ERB.new(log_run_template).result(binding)
+        write_file "#{process_log_directory}/run", log_run
+        
+      end
+    end
+    
+  end
+  
+  private
+  def create_directory(location)
+    say "creating: #{location}"
+    FileUtils.mkdir(location)
+  end
+  
+  def inline_variables(command)
+    variable_name_regex = 
+    Hash[*command.scan(ENV_VARIABLE_REGEX).flatten]
+  end
+end