first attempt at screen-based running

lib/foreman/cli.rb

@@ -20,6 +20,13 @@ class Foreman::CLI < Thor
     Foreman::Engine.new(procfile).execute(process)
   end
 
+  desc "screen [PROCFILE]", "Run the app described in PROCFILE as screen windows"
+
+  def screen(procfile="Procfile")
+    error "#{procfile} does not exist." unless procfile_exists?(procfile)
+    Foreman::Engine.new(procfile).screen
+  end
+
   desc "export APP [PROCFILE] [FORMAT]", "Export the app described in PROCFILE as APP to another FORMAT"
 
   def export(app, procfile="Procfile", format="upstart")

lib/foreman/engine.rb

@@ -1,5 +1,6 @@
 require "foreman"
 require "foreman/process"
+require "tempfile"
 
 class Foreman::Engine
 
@@ -34,6 +35,19 @@ class Foreman::Engine
     run_loop
   end
 
+  def screen
+    tempfile = Tempfile.new("foreman")
+    tempfile.puts "sessionname foreman"
+    processes.each do |name, process|
+      tempfile.puts "screen -t #{name} #{process.command}"
+    end
+    tempfile.close
+
+    system "screen -c #{tempfile.path}"
+
+    tempfile.delete
+  end
+
   def execute(name)
     run(processes[name], false)
   end