Class: GitObjectBrowser::Models::PackedObject

Inherits:
Bindata
  • Object
show all
Defined in:
lib/git-object-browser/models/packed_object.rb

Constant Summary collapse

TYPES = 
%w{
  undefined
  commit
  tree
  blob
  tag
  undefined
  ofs_delta
  ref_delta
}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Bindata

#binstr, #byte, #bytes, #find_char, #hex, #int, #peek, #raw, #seek, #skip, #switch_source

Constructor Details

#initialize(index, input) ⇒ PackedObject

Returns a new instance of PackedObject.



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# File 'lib/git-object-browser/models/packed_object.rb', line 27

def initialize(index, input)
  super(input)
  @index = index
end

Instance Attribute Details

#header ⇒ Object (readonly)

Returns the value of attribute header.



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# File 'lib/git-object-browser/models/packed_object.rb', line 13

def header
  @header
end

#object ⇒ Object (readonly)

Returns the value of attribute object.



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# File 'lib/git-object-browser/models/packed_object.rb', line 14

def object
  @object
end

#raw_data ⇒ Object (readonly)

Returns the value of attribute raw_data.



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# File 'lib/git-object-browser/models/packed_object.rb', line 13

def raw_data
  @raw_data
end

Class Method Details

.path?(relpath) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/git-object-browser/models/packed_object.rb', line 89

def self.path?(relpath)
  return relpath =~ %r{\Aobjects/pack/pack-[0-9a-f]{40}\.pack\z}
end

Instance Method Details

#parse(offset) ⇒ Object 



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# File 'lib/git-object-browser/models/packed_object.rb', line 32

def parse(offset)
  parse_raw(offset)
  input = "#{ @object_type } #{ @object_size }\0" + @raw_data
  @object = GitObject.new(nil).parse_inflated(input)
  self
end

#parse_header(offset) ⇒ Object 



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# File 'lib/git-object-browser/models/packed_object.rb', line 56

def parse_header(offset)
  seek(offset)
  (type, size, header_size) = parse_type_and_size
  type = TYPES[type]
  { :type => type, :size => size, :header_size => header_size }
end

#parse_ofs_delta_header(offset, header) ⇒ Object 



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# File 'lib/git-object-browser/models/packed_object.rb', line 63

def parse_ofs_delta_header(offset, header)
  (delta_offset, delta_header_size) = parse_delta_offset
  header[:base_offset] = offset - delta_offset
  header[:header_size] += delta_header_size
  header
end

#parse_raw(offset) ⇒ Object 



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# File 'lib/git-object-browser/models/packed_object.rb', line 39

def parse_raw(offset)
  @offset = offset
  @header = parse_header(offset)

  if @header[:type] == 'ofs_delta'
    obj_ofs_delta
  elsif @header[:type] == 'ref_delta'
    obj_ref_delta
  else
    @object_type = @header[:type]
    @object_size = @header[:size]
    @raw_data = zlib_inflate
  end

  [@object_type, @object_size]
end

#parse_ref_delta_header(header) ⇒ Object 



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# File 'lib/git-object-browser/models/packed_object.rb', line 70

def parse_ref_delta_header(header)
  header[:base_sha1]   = hex(20)
  header[:header_size] += 20
  header
end

#to_hash ⇒ Object 



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# File 'lib/git-object-browser/models/packed_object.rb', line 76

def to_hash
  return {
    :offset => @offset,
    :type => @header[:type], # commit, tree, blob, tag, ofs_delta, ref_delta
    :size => @header[:size],
    :header_size => @header[:header_size],
    :base_offset => @header[:base_offset],
    :delta_commands => @delta_commands,
    :base_size => @base_size,
    :object => @object.to_hash,
  }
end