simplify: support .xgrep file

bin/xgrep

@@ -2,7 +2,14 @@
 
 require_relative '../lib/xgrep/commander'
 
-commander = Xgrep::Commander.new(ARGV)
+if File.exist? './.xgrep'
+  project_argv = File.read('./.xgrep').split(/\s/).reject { |x| x.strip == "" }
+  argv = project_argv + ARGV
+else
+  argv = ARGV
+end
+
+commander = Xgrep::Commander.new(argv)
 if commander.valid?
   commander.execute
 else

lib/xgrep/commander.rb

@@ -59,6 +59,7 @@ module Xgrep
 
       @option_parser.parse!(argv)
       options.terms = argv # must be after parse!
+
       if options.exclude_pathspec.size > 0 and options.include_pathspec.size == 0
         options.pathspec = ['.'] + options.exclude_pathspec
       else
@@ -115,11 +116,7 @@ module Xgrep
     private
 
     def default_environment
-      if File.exist?('./.xgrep')
-        Xgrep::CustomEnv.new
-      else
-        Xgrep::SimpleEnv.new
-      end
+      Xgrep::SimpleEnv.new
     end
   end