Add support for Windows.

guard-rails.gemspec

@@ -20,6 +20,8 @@ Gem::Specification.new do |s|
   s.require_paths = ["lib"]
 
   s.add_dependency 'guard', '>= 0.2.2'
+  s.add_dependency 'childprocess'
+  s.add_dependency 'sys-proctable'
 
   s.add_development_dependency 'rspec', '~> 2.6.0'
   s.add_development_dependency 'mocha'

lib/guard/rails/runner.rb

@@ -1,9 +1,10 @@
 require 'fileutils'
+require 'timeout'
+require 'childprocess'
+require 'sys/proctable'
 
 module Guard
   class RailsRunner
-    MAX_WAIT_COUNT = 10
-
     attr_reader :options
 
     def initialize(options)
@@ -12,14 +13,19 @@ module Guard
 
     def start
       kill_unmanaged_pid! if options[:force_run]
-      run_rails_command!
-      wait_for_pid
+      process = run_rails_command!
+      rails_started = wait_for_rails
+      File.open(pid_file, "w") {|file| file.write process.pid} if rails_started
+      rails_started
     end
 
     def stop
-      if File.file?(pid_file)
-        system %{kill -SIGINT #{File.read(pid_file).strip}}
-        wait_for_no_pid if $?.exitstatus == 0
+      if has_pid?
+        unless windows?
+          Process.kill Signal.list["INT"], pid rescue nil
+        else
+          kill_all_child_processes
+        end
         FileUtils.rm pid_file, :force => true
       end
     end
@@ -40,7 +46,11 @@ module Guard
       rails_options << '-u' if options[:debugger]
       rails_options << options[:server] if options[:server]
 
-      %{sh -c 'cd #{Dir.pwd} && RAILS_ENV=#{options[:environment]} rails s #{rails_options.join(' ')} &'}
+      cmd = []
+      if windows?
+        cmd << 'cmd' << '/C'
+      end
+      cmd << "rails server #{rails_options.join(' ')}"
     end
 
     def pid_file
@@ -51,56 +61,78 @@ module Guard
       File.file?(pid_file) ? File.read(pid_file).to_i : nil
     end
 
-    def sleep_time
-      options[:timeout].to_f / MAX_WAIT_COUNT.to_f
-    end
-
     private
+
     def run_rails_command!
-      system build_rails_command
+      process = ChildProcess.build *build_rails_command
+      process.environment["RAILS_ENV"] = options[:environment]
+      process.io.inherit!
+      process.start
+      process
     end
 
     def has_pid?
       File.file?(pid_file)
     end
 
-    def wait_for_pid_action
-      sleep sleep_time
-    end
-
     def kill_unmanaged_pid!
       if pid = unmanaged_pid
-        system %{kill -KILL #{pid}}
-        FileUtils.rm pid_file
-        wait_for_no_pid
+        Process.kill Signal.list["KILL"], pid
+        FileUtils.rm pid_file if has_pid?
       end
     end
 
     def unmanaged_pid
+      unless windows?
         %x{lsof -n -i TCP:#{options[:port]}}.each_line { |line|
           if line["*:#{options[:port]} "]
             return line.split("\s")[1]
           end
         }
+      else
+        %x{netstat -ano}.each_line { |line| 
+          protocol, local_address, _, state, pid = line.strip.split(/\s+/)          
+          return pid.to_i if protocol == "TCP" && 
+                          state == "LISTENING" && 
+                          local_address =~ /:#{options[:port]}$/
+        }
+      end
       nil
     end
 
     private
-    def wait_for_pid
-      wait_for_pid_loop
+
+    def wait_for_rails
+      Timeout.timeout(options[:timeout]) {sleep 1 until rails_running?}
+      true
+    rescue Timeout::Error
+      false
     end
 
-    def wait_for_no_pid
-      wait_for_pid_loop(false)
+    def rails_running?
+      return false unless has_pid?
+      TCPSocket.new('127.0.0.1', options[:port]).close
+      true
+    rescue Errno::ECONNREFUSED
+      false
     end
 
-    def wait_for_pid_loop(check_for_existince = true)
-      count = 0
-      while !(check_for_existince ? has_pid? : !has_pid?) && count < MAX_WAIT_COUNT
-        wait_for_pid_action
-        count += 1
+    def windows?
+      RUBY_PLATFORM =~ /mswin|msys|mingw/ 
     end
-      !(count == MAX_WAIT_COUNT)
+    
+    def kill_all_child_processes
+      all_pids_for(pid).each do |pid|
+        Process.kill Signal.list["KILL"], pid rescue nil
+      end
+    end
+
+    def all_pids_for(parent_pid)
+      pids = [parent_pid]
+      Sys::ProcTable.ps do |process|
+        pids += all_pids_for(process.pid) if process.ppid == parent_pid
+      end
+      pids
     end
   end
 end

spec/lib/guard/rails/runner_spec.rb

@@ -36,7 +36,7 @@ describe Guard::RailsRunner do
   describe '#build_rails_command' do
     context 'no daemon' do
       it "should not have a daemon switch" do
-        runner.build_rails_command.should_not match(%r{ -d})
+        runner.build_rails_command.last.should_not match(%r{ -d})
       end
     end
 
@@ -44,7 +44,7 @@ describe Guard::RailsRunner do
       let(:options) { default_options.merge(:daemon => true) }
 
       it "should have a daemon switch" do
-        runner.build_rails_command.should match(%r{ -d})
+        runner.build_rails_command.last.should match(%r{ -d})
       end
     end
     
@@ -52,7 +52,7 @@ describe Guard::RailsRunner do
       let(:options) { default_options.merge(:debugger => true) }
 
       it "should have a debugger switch" do
-        runner.build_rails_command.should match(%r{ -u})
+        runner.build_rails_command.last.should match(%r{ -u})
       end
     end
 
@@ -60,24 +60,29 @@ describe Guard::RailsRunner do
       let(:options) { default_options.merge(:server => 'thin') }
 
       it "should have the server name" do
-        runner.build_rails_command.should match(%r{thin})
+        runner.build_rails_command.last.should match(%r{thin})
       end
     end
   end
 
   describe '#start' do
+    include FakeFS::SpecHelpers
+
     let(:kill_expectation) { runner.expects(:kill_unmanaged_pid!) }
     let(:pid_stub) { runner.stubs(:has_pid?) }
 
     before do
-      runner.expects(:run_rails_command!).once
+      FileUtils.mkdir_p File.split(runner.pid_file).first
+      process = mock('process')
+      process.stubs(:pid).returns(123)
+      runner.expects(:run_rails_command!).once.returns(process)
     end
 
     context 'do not force run' do
       before do
         pid_stub.returns(true)
         kill_expectation.never
-        runner.expects(:wait_for_pid_action).never
+        runner.stubs(:rails_running?).once.returns(true)
       end
 
       it "should act properly" do
@@ -91,7 +96,7 @@ describe Guard::RailsRunner do
       before do
         pid_stub.returns(true)
         kill_expectation.once
-        runner.expects(:wait_for_pid_action).never
+        runner.stubs(:rails_running?).once.returns(true)
       end
 
       it "should act properly" do
@@ -100,10 +105,12 @@ describe Guard::RailsRunner do
     end
 
     context "don't write the pid" do
+      let(:options) { default_options.merge(:timeout => 0.1) }
+
       before do
         pid_stub.returns(false)
         kill_expectation.never
-        runner.expects(:wait_for_pid_action).times(Guard::RailsRunner::MAX_WAIT_COUNT)
+        runner.stubs(:rails_running?).once.returns(false)
       end
 
       it "should act properly" do
@@ -112,12 +119,4 @@ describe Guard::RailsRunner do
     end
   end
 
-  describe '#sleep_time' do
-    let(:timeout) { 30 }
-    let(:options) { default_options.merge(:timeout => timeout) }
-
-    it "should adjust the sleep time as necessary" do
-      runner.sleep_time.should == (timeout.to_f / Guard::RailsRunner::MAX_WAIT_COUNT.to_f)
-    end
-  end
 end