1 require 'git/internal/object'

2 require 'git/internal/pack'

3 require 'git/internal/loose'

5 module Git

6   class Repository

7     def initialize(git_dir)

8       @git_dir = git_dir

9     end

11     def get_object_by_sha1(sha1)

12       r = get_raw_object_by_sha1(sha1)

13       return nil if !r

15       case r.type

16       when :blob

17         return Blob.new(r, self)

18       when :tree

19         return Tree.new(r, self)

20       when :commit

21         return Commit.new(r, self)

22       when :tag

23         return Tag.new(r, self)

24       else

25         raise RuntimeError, "got invalid object-type"

26       end

27     end

29     def get_raw_object_by_sha1(sha1)

30       sha1 = [sha1].pack("H*")

31       packs = Dir.glob(@git_dir + '/objects/pack/pack-*.pack')

33       # try packs

34       packs.each do |pack|

35         storage = Git::Internal::PackStorage.new(pack)

36         o = storage[sha1]

37         return o if o

38       end

40       # try loose storage

41       storage = Git::Internal::LooseStorage.new(@git_dir+'/objects')

42       o = storage[sha1]

43       return o if o

45       # try packs again, maybe the object got packed in the meantime

46       packs.each do |pack|

47         storage = Git::Internal::PackStorage.new(pack)

48         o = storage[sha1]

49         return o if o

50       end

52       return nil

53     end

54   end

55 end