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+#!/usr/bin/env ruby
+
+# This is a command line client that can do a number of read operations
+# on a git repository in pure ruby. This may be helpful if you have access
+# to a computer that has no C compiler but you want to do some git stuff 
+# on it.  It's also helpful for me to test Git stuff with.
+# 
+# author : Scott Chacon (schacon@gmail.com)
+#
+# todo:
+#   add --git-dir 
+#   add --log-file 
+#   add --help
+
+#require 'lib/git'
+require 'rubygems'
+require 'git'
+require 'logger'
+
+command = ARGV[0]
+
+if !command
+  puts 'You have to provide a command'
+  puts 'usage: gitr (command) [args]'
+  puts
+  puts 'commands: log'
+  puts '          log-shas'
+  puts '          cat-file'
+  puts '          rev-parse'
+  puts '          branches'
+  puts '          config'
+  exit
+end
+
+git_dir = ENV['GIT_DIR'] || '.git'
+@git = Git.bare(git_dir, :log => Logger.new(STDOUT))
+
+case command
+when 'log'
+  # gitr log
+  @git.log.each do |l|
+    puts 'commit ' + l.sha
+    puts l.contents
+    puts
+  end
+when 'log-shas'
+  # gitr log-shas
+  puts @git.log
+when 'cat-file'
+  # gitr cat-file
+  puts @git.cat_file(ARGV[1])
+when 'rev-parse'
+  # gitr rev-parse
+  puts @git.revparse(ARGV[1])  
+when 'branches'
+  # gitr branches
+  puts @git.branches
+when 'config'
+  # gitr config
+  @git.config.sort.each do |k,v|
+    puts "#{k} : #{v}"
+  end
+end
+
+# gitr ls-tree
+# gitr pack-browse
+
+# gitr diff / stats ?
+# output in yaml?
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