1  """
 2  Compress module
 3  """
 4  
 5  import os
 6  
 7  
 8  class Compress:
 9      """
10      Base class for Compress instances.
11      """
12  
13      def pack(self, path, output):
14          """
15          Compresses files in directory path to file output.
16  
17          Args:
18              path: input directory path
19              output: output file
20          """
21  
22          raise NotImplementedError
23  
24      def unpack(self, path, output):
25          """
26          Extracts all files in path to output.
27  
28          Args:
29              path: input file path
30              output: output directory
31          """
32  
33          raise NotImplementedError
34  
35      def validate(self, directory, path):
36          """
37          Validates path is under directory.
38  
39          Args:
40              directory: base directory
41              path: path to validate
42  
43          Returns:
44              True if path is under directory, False otherwise
45          """
46  
47          directory = os.path.abspath(directory)
48          path = os.path.abspath(path)
49          prefix = os.path.commonprefix([directory, path])
50  
51          return prefix == directory