Use POSIX::Spawn to make foreman ruby 1.8 compatible and have all specs passing.

Gemfile

@@ -6,7 +6,7 @@ platform :mingw do
   gem "win32console", "~> 1.3.0"
 end
 
-platform :jruby do
+platform :jruby, :ruby_18 do
   gem "posix-spawn", "~> 0.3.6"
 end
 

lib/foreman/process.rb

@@ -52,18 +52,10 @@ class Foreman::Process
       Dir.chdir(cwd) do
         Process.spawn env, expanded_command(env), :out => output, :err => output
       end
-    elsif Foreman.jruby_18?
+    elsif Foreman.jruby_18? || Foreman.ruby_18?
       require "posix/spawn"
       wrapped_command = "#{Foreman.runner} -d '#{cwd}' -p -- #{command}"
       POSIX::Spawn.spawn env, wrapped_command, :out => output, :err => output
-    elsif Foreman.ruby_18?
-      fork do
-        $stdout.reopen output
-        $stderr.reopen output
-        env.each { |k,v| ENV[k] = v }
-        wrapped_command = "#{Foreman.runner} -d '#{cwd}' -p -- #{command}"
-        Kernel.exec wrapped_command
-      end
     else
       wrapped_command = "#{Foreman.runner} -d '#{cwd}' -p -- #{command}"
       Process.spawn env, wrapped_command, :out => output, :err => output

spec/spec_helper.rb

@@ -36,7 +36,12 @@ end
 
 def forked_foreman(args)
   rd, wr = make_pipe
-  Process.spawn("bundle exec bin/foreman #{args}", :out => wr, :err => wr)
+  if Foreman.jruby_18? || Foreman.ruby_18?
+    require 'posix/spawn'
+    POSIX::Spawn.spawn({}, "bundle exec bin/foreman #{args}", :out => wr, :err => wr)
+  else
+    Process.spawn("bundle exec bin/foreman #{args}", :out => wr, :err => wr)
+  end
   wr.close
   rd.read
 end
@@ -61,7 +66,12 @@ def fork_and_capture(&blk)
 end
 
 def fork_and_get_exitstatus(args)
-  pid = Process.spawn("bundle exec bin/foreman #{args}", :out => "/dev/null", :err => "/dev/null")
+  pid = if Foreman.jruby_18? || Foreman.ruby_18?
+    require 'posix/spawn'
+    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")
+  end
   Process.wait(pid)
   $?.exitstatus
 end