Merge pull request #360 from kjwierenga/feature/require-posix-spawn

Feature/require posix spawn

lib/foreman/cli.rb

@@ -34,6 +34,7 @@ class Foreman::CLI < Thor
   end
 
   def start(process=nil)
+    require_posix_spawn_for_ruby_18!
     check_procfile!
     load_environment!
     engine.load_procfile(procfile)
@@ -137,6 +138,14 @@ private ######################################################################
     end
   end
 
+  def require_posix_spawn_for_ruby_18!
+    begin
+      Kernel.require 'posix/spawn' # Use Kernel explicitly so we can mock the require call in the spec
+    rescue LoadError
+      error "foreman requires gem `posix-spawn` on Ruby #{RUBY_VERSION}. Please `gem install posix-spawn`."
+    end if Foreman.ruby_18?
+  end
+
   def procfile
     case
       when options[:procfile] then options[:procfile]

spec/foreman/cli_spec.rb

@@ -100,4 +100,12 @@ describe "Foreman::CLI", :fakefs do
     end
   end
 
+  describe "when posix-spawn is not present on ruby 1.8" do
+    it "should fail with an error" do
+      mock(Kernel).require('posix/spawn') { raise LoadError }
+      output = foreman("start -f #{resource_path("Procfile")}")
+      output.should == "ERROR: foreman requires gem `posix-spawn` on Ruby #{RUBY_VERSION}. Please `gem install posix-spawn`.\n"
+    end
+  end if running_ruby_18?
+
 end

spec/spec_helper.rb

@@ -10,6 +10,15 @@ require "fakefs/spec_helpers"
 
 $:.unshift File.expand_path("../../lib", __FILE__)
 
+begin
+  def running_ruby_18?
+    defined?(RUBY_VERSION) and RUBY_VERSION =~ /^1\.8\.\d+/
+  end
+  require 'posix/spawn' if running_ruby_18?
+rescue LoadError
+  STDERR.puts "WARNING: foreman requires gem `posix-spawn` on Ruby #{RUBY_VERSION}. Please `gem install posix-spawn`."
+end
+
 def mock_export_error(message)
   lambda { yield }.should raise_error(Foreman::Export::Exception, message)
 end
@@ -36,8 +45,7 @@ end
 
 def forked_foreman(args)
   rd, wr = make_pipe
-  if Foreman.jruby_18? || Foreman.ruby_18?
-    require 'posix/spawn'
+  if running_ruby_18?
     POSIX::Spawn.spawn({}, "bundle exec bin/foreman #{args}", :out => wr, :err => wr)
   else
     Process.spawn("bundle exec bin/foreman #{args}", :out => wr, :err => wr)
@@ -66,8 +74,7 @@ def fork_and_capture(&blk)
 end
 
 def fork_and_get_exitstatus(args)
-  pid = if Foreman.jruby_18? || Foreman.ruby_18?
-    require 'posix/spawn'
+  pid = if running_ruby_18?
     POSIX::Spawn.spawn({}, "bundle exec bin/foreman #{args}", :out => "/dev/null", :err => "/dev/null")
   else
     Process.spawn("bundle exec bin/foreman #{args}", :out => "/dev/null", :err => "/dev/null")
@@ -170,4 +177,5 @@ RSpec.configure do |config|
   config.order = 'rand'
   config.include FakeFS::SpecHelpers, :fakefs
   config.mock_with :rr
+  config.backtrace_clean_patterns = []
 end