lib/git/raw/repository.rb

   1 #
   2 # converted from the gitrb project
   3 #
   4 # authors:
   5 #    Matthias Lederhofer <matled@gmx.net>
   6 #    Simon 'corecode' Schubert <corecode@fs.ei.tum.de>
   7 #
   8 # provides native ruby access to git objects and pack files
   9 #
  10
  11 require 'git/raw/internal/object'
  12 require 'git/raw/internal/pack'
  13 require 'git/raw/internal/loose'
  14 require 'git/raw/object'
  15
  16 module Git
  17   module Raw
  18
  19     class Repository
  20       def initialize(git_dir)
  21         @git_dir = git_dir
  22         @loose = Raw::Internal::LooseStorage.new(git_path("objects"))
  23         @packs = []
  24         initpacks
  25       end
  26
  27       def show
  28         @packs.each do |p|
  29           puts p.name
  30           puts
  31           p.each_sha1 do |s|
  32             puts "**#{p[s].type}**"
  33             if p[s].type.to_s == 'commit'
  34               puts s.unpack('H*')
  35               puts p[s].content
  36             end
  37           end
  38           puts
  39         end
  40       end
  41
  42       def object(sha)
  43         o = get_raw_object_by_sha1(sha)
  44         c = Git::Raw::Object.from_raw(o)
  45       end
  46
  47       def cat_file(sha)
  48         object(sha).raw_content
  49       end
  50
  51       def log(sha, count = 30)
  52         output = ''
  53         i = 0
  54
  55         while sha && (i < count) do
  56           o = get_raw_object_by_sha1(sha)
  57           c = Git::Raw::Object.from_raw(o)
  58
  59           output += "commit #{sha}\n"
  60           output += o.content + "\n"
  61
  62           sha = c.parent.first
  63           i += 1
  64         end
  65
  66         output
  67       end
  68
  69       def get_object_by_sha1(sha1)
  70         r = get_raw_object_by_sha1(sha1)
  71         return nil if !r
  72         Object.from_raw(r, self)
  73       end
  74
  75       def get_raw_object_by_sha1(sha1)
  76         sha1 = [sha1].pack("H*")
  77
  78         # try packs
  79         @packs.each do |pack|
  80           o = pack[sha1]
  81           return o if o
  82         end
  83
  84         # try loose storage
  85         o = @loose[sha1]
  86         return o if o
  87
  88         # try packs again, maybe the object got packed in the meantime
  89         initpacks
  90         @packs.each do |pack|
  91           o = pack[sha1]
  92           return o if o
  93         end
  94
  95         nil
  96       end
  97
  98       protected
  99
 100         def git_path(path)
 101           return "#@git_dir/#{path}"
 102         end
 103
 104       private
 105
 106         def initpacks
 107           @packs.each do |pack|
 108             pack.close
 109           end
 110           @packs = []
 111           Dir.open(git_path("objects/pack/")) do |dir|
 112             dir.each do |entry|
 113               if entry =~ /\.pack$/i
 114                 @packs << Git::Raw::Internal::PackStorage.new(git_path("objects/pack/" \
 115                                                                   + entry))
 116               end
 117             end
 118           end
 119         end
 120
 121     end
 122
 123   end
 124 end