allow concurrency to be used in development mode

lib/foreman/cli.rb

@@ -9,17 +9,19 @@ class Foreman::CLI < Thor
 
   desc "start [PROCESS]", "Start the application, or a specific process"
 
-  method_option :screen,   :type => :boolean, :aliases => "-s"
+  method_option :screen,      :type => :boolean, :aliases => "-s"
+  method_option :concurrency, :type => :string,  :aliases => "-c",
+    :banner => '"alpha=5,bar=3"'
 
   def start(process=nil)
     check_procfile!
 
     if process
-      engine.execute(process)
+      engine.execute(process, options)
     elsif options[:screen]
       engine.screen
     else
-      engine.start
+      engine.start(options)
     end
   end
 

lib/foreman/engine.rb

@@ -1,5 +1,6 @@
 require "foreman"
 require "foreman/process"
+require "foreman/utils"
 require "pty"
 require "tempfile"
 require "term/ansicolor"
@@ -12,28 +13,42 @@ class Foreman::Engine
 
   extend Term::ANSIColor
 
-  COLORS = [ cyan, yellow, green, magenta, on_blue ]
+  COLORS = [ cyan, yellow, green, magenta, red ]
 
   def initialize(procfile)
     @procfile  = read_procfile(procfile)
     @directory = File.expand_path(File.dirname(procfile))
   end
 
-  def processes
+  def processes(concurrency=nil)
     @processes ||= begin
+      concurrency = Foreman::Utils.parse_concurrency(concurrency)
+
       procfile.split("\n").inject({}) do |hash, line|
         next if line.strip == ""
-        process = Foreman::Process.new(*line.split(" ", 2))
-        process.color = next_color
-        hash.update(process.name => process)
+        name, command = line.split(" ", 2)
+
+        if concurrency[name] > 1 then
+          1.upto(concurrency[name]) do |num|
+            process = Foreman::Process.new("#{name}.#{num}", command)
+            process.color = next_color
+            hash[process.name] = process
+          end
+        else
+          process = Foreman::Process.new(name, command)
+          process.color = next_color
+          hash[process.name] = process
+        end
+
+        hash
       end
     end
   end
 
-  def start
+  def start(options={})
     proctitle "ruby: foreman master"
 
-    processes.each do |name, process|
+    processes(options[:concurrency]).each do |name, process|
       fork process
     end
 
@@ -56,8 +71,17 @@ class Foreman::Engine
     tempfile.delete
   end
 
-  def execute(name)
-    run(processes[name], false)
+  def execute(name, options={})
+    processes(options[:concurrency]).values.select do |process|
+      process.name =~ /\A#{name}\.?\d*\Z/
+    end.each do |process|
+      fork process
+    end
+
+    trap("TERM") { kill_and_exit("TERM") }
+    trap("INT")  { kill_and_exit("INT")  }
+
+    watch_for_termination
   end
 
 private ######################################################################

lib/foreman/export/base.rb

@@ -1,4 +1,5 @@
 require "foreman/export"
+require "foreman/utils"
 
 class Foreman::Export::Base
 
@@ -26,16 +27,6 @@ private ######################################################################
     File.read(File.expand_path("../../../../export/#{name}", __FILE__))
   end
 
-  def parse_concurrency(concurrency)
-    @concurrency ||= begin
-      pairs = concurrency.to_s.gsub(/\s/, "").split(",")
-      pairs.inject(Hash.new(1)) do |hash, pair|
-        process, amount = pair.split("=")
-        hash.update(process => amount.to_i)        
-      end
-    end
-  end
-
   def port_for(base_port, app, num)
     base_port ||= 5000
     offset = engine.processes.keys.sort.index(app) * 100

lib/foreman/utils.rb

@@ -0,0 +1,15 @@
+require "foreman"
+
+class Foreman::Utils
+
+  def self.parse_concurrency(concurrency)
+    @concurrency ||= begin
+      pairs = concurrency.to_s.gsub(/\s/, "").split(",")
+      pairs.inject(Hash.new(1)) do |hash, pair|
+        process, amount = pair.split("=")
+        hash.update(process => amount.to_i)        
+      end
+    end
+  end
+
+end

man/foreman.1.ronn

@@ -25,6 +25,10 @@ application type.
 
 The following options control how the application is run:
 
+  * `-c`, `--concurrency`:
+    Specify the number of each process type to run. The value passed in
+    should be in the format `process=num,process=num`
+
   * `-s`, `--screen`:
     Run the application as a series of screen windows rather than interleaved
     in stdout.

spec/foreman/cli_spec.rb

@@ -19,7 +19,7 @@ describe "Foreman::CLI" do
 
       it "runs successfully" do
         dont_allow(subject).error
-        mock.instance_of(Foreman::Engine).start
+        mock.instance_of(Foreman::Engine).start({})
         subject.start
       end
     end

spec/foreman/engine_spec.rb

@@ -33,7 +33,8 @@ describe "Foreman::Engine" do
   describe "execute" do
     it "runs the processes" do
       write_procfile
-      mock(subject).run(subject.processes["alpha"], false)
+      mock(subject).fork(subject.processes["alpha"])
+      mock(subject).watch_for_termination
       subject.execute("alpha")
     end
   end