兼容ruby 1.9

lib/grack/lib/grack/git.rb

@@ -19,15 +19,26 @@ module Grack
       # _Not_ the same as `IO.popen(...).read`
       # By using a block we tell IO.popen to close (wait for) the child process
       # after we are done reading its output.
+      if RUBY_VERSION.start_with?("2")
         IO.popen(popen_env, cmd, popen_options) { |p| p.read }
+      else
+        IO.popen(cmd, popen_options) { |p| p.read }
+      end
     end
 
     def execute(cmd)
       cmd = command(cmd)
       if block_given?
+
+        if RUBY_VERSION.start_with?("2")
           IO.popen(popen_env, cmd, File::RDWR, popen_options) do |pipe|
             yield(pipe)
           end
+        else
+          IO.popen(cmd, File::RDWR, popen_options) do |pipe|
+            yield(pipe)
+          end
+        end
       else
         capture(cmd).chomp
       end
@@ -61,10 +72,12 @@ module Grack
 
       match = execute(%W(rev-parse --git-dir)).match(/\.$|\.git$/)
       
+      if RUBY_VERSION.start_with?("2")
         if match.to_s == '.git'
           # Since the parent could be a git repo, we want to make sure the actual repo contains a git dir.
           return false unless Dir.entries(repo).include?('.git')
         end
+      end
 
       match
     end