Class: LibGems::OldFormat

Inherits:
Object
  • Object
show all
Defined in:
lib/libgems/old_format.rb

Overview

The format class knows the guts of the RubyGem .gem file format and provides the capability to read gem files

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(gem_path) ⇒ OldFormat

Constructs an instance of a Format object, representing the gem’s data structure.

gem
String

The file name of the gem



23
24
25
26
27
28
29
 
# File 'lib/libgems/old_format.rb', line 23

def initialize(gem_path)
  require 'fileutils'
  require 'zlib'
  LibGems.load_yaml

  @gem_path = gem_path
end

Instance Attribute Details

#file_entries ⇒ Object

Returns the value of attribute file_entries.



15
16
17
 
# File 'lib/libgems/old_format.rb', line 15

def file_entries
  @file_entries
end

#gem_path ⇒ Object

Returns the value of attribute gem_path.



15
16
17
 
# File 'lib/libgems/old_format.rb', line 15

def gem_path
  @gem_path
end

#spec ⇒ Object

Returns the value of attribute spec.



15
16
17
 
# File 'lib/libgems/old_format.rb', line 15

def spec
  @spec
end

Class Method Details

.from_file_by_path(file_path) ⇒ Object

Reads the named gem file and returns a Format object, representing the data from the gem file

file_path
String

Path to the gem file



37
38
39
40
41
42
43
44
45
 
# File 'lib/libgems/old_format.rb', line 37

def self.from_file_by_path(file_path)
  unless File.exist?(file_path)
    raise LibGems::Exception, "Cannot load gem file [#{file_path}]"
  end

  File.open(file_path, 'rb') do |file|
    from_io(file, file_path)
  end
end

.from_io(io, gem_path = "(io)") ⇒ Object

Reads a gem from an io stream and returns a Format object, representing the data from the gem file

io
IO

Stream from which to read the gem



53
54
55
56
57
58
59
60
61
62
 
# File 'lib/libgems/old_format.rb', line 53

def self.from_io(io, gem_path="(io)")
  format = self.new(gem_path)
  skip_ruby(io)
  format.spec = read_spec(io)
  format.file_entries = []
  read_files_from_gem(io) do |entry, file_data|
    format.file_entries << [entry, file_data]
  end
  format
end