git.rb

   1 require 'git/internal/object'
   2 require 'git/internal/pack'
   3 require 'git/internal/loose'
   4 require 'git/object'
   5
   6 module Git
   7   class Repository
   8     def initialize(git_dir)
   9       @git_dir = git_dir
  10       @loose = Internal::LooseStorage.new(git_path("objects"))
  11       @packs = []
  12       initpacks
  13     end
  14
  15     def git_path(path)
  16       return "#@git_dir/#{path}"
  17     end
  18
  19     def get_object_by_sha1(sha1)
  20       r = get_raw_object_by_sha1(sha1)
  21       return nil if !r
  22       Object.from_raw(r, self)
  23     end
  24
  25     def get_raw_object_by_sha1(sha1)
  26       sha1 = [sha1].pack("H*")
  27
  28       # try packs
  29       @packs.each do |pack|
  30         o = pack[sha1]
  31         return o if o
  32       end
  33
  34       # try loose storage
  35       o = @loose[sha1]
  36       return o if o
  37
  38       # try packs again, maybe the object got packed in the meantime
  39       initpacks
  40       @packs.each do |pack|
  41         o = pack[sha1]
  42         return o if o
  43       end
  44
  45       nil
  46     end
  47
  48     def initpacks
  49       @packs.each do |pack|
  50         pack.close
  51       end
  52       @packs = []
  53       Dir.open(git_path("objects/pack/")) do |dir|
  54         dir.each do |entry|
  55           if entry =~ /\.pack$/i
  56             @packs << Git::Internal::PackStorage.new(git_path("objects/pack/" \
  57                                                               + entry))
  58           end
  59         end
  60       end
  61     end
  62   end
  63 end
  64
  65 if $0 == __FILE__
  66   require 'git'
  67   r = Git::Repository.new(ARGV[0])
  68   ARGV[1..-1].each do |sha1|
  69     o = r.get_object_by_sha1(sha1)
  70     if !o
  71       puts 'no such object'
  72       next
  73     end
  74     puts o.type
  75     case o.type
  76     when :blob
  77       puts o.content
  78     when :tree
  79       puts o.entry.collect { |e| "%s %s" % [e.sha1, e.name] }.join("\n")
  80     when :commit
  81       puts o.raw_content
  82     when :tag
  83       puts o.raw_content
  84     end
  85   end
  86 end