1import os
2import hashlib
3import zipfile
4import tarfile
5
6def uncompress_file_to_dir(compressed_file, uncompress_dir):
7    command = None
8    extension = os.path.splitext(compressed_file)[1]
9
10    try:
11        os.mkdir(uncompress_dir)
12    except FileExistsError as e:
13        pass
14
15    if extension == '.gz':
16        tar = tarfile.open(compressed_file)
17        tar.extractall(uncompress_dir)
18        tar.close()
19    elif extension == '.zip':
20        zip_file = zipfile.ZipFile(compressed_file)
21        zip_file.extractall(uncompress_dir)
22        zip_file.close()
23
24        uncompress_dir = os.path.join(uncompress_dir, os.listdir(uncompress_dir)[0])
25        if " " in os.listdir(uncompress_dir)[0]:
26            print("replacing whitespace in directory name")
27            os.rename(os.path.join(uncompress_dir, os.listdir(uncompress_dir)[0]),
28                            os.path.join(uncompress_dir, os.listdir(uncompress_dir)[0].replace(" ", "_")))
29    else:
30        print("Error: unknown extension " + extension)
31
32    return os.path.join(uncompress_dir, os.listdir(uncompress_dir)[0])
33
34BUF_SIZE = 1048576
35
36def get_hash(file_path):
37    sha512 = hashlib.sha512()
38    with open(file_path, 'rb') as f:
39        while True:
40            data = f.read(BUF_SIZE)
41            if not data:
42                break
43            sha512.update(data)
44        return sha512.hexdigest()
45
46def get_file_info(mar_file, url):
47    filesize = os.path.getsize(mar_file)
48    data = { 'hash' : get_hash(mar_file),
49            'hashFunction' : 'sha512',
50            'size' : filesize,
51            'url' : url + os.path.basename(mar_file)}
52
53    return data
54
55def replace_variables_in_string(string, **kwargs):
56    new_string = string
57    for key, val in kwargs.items():
58        new_string = new_string.replace('$(%s)'%key, val)
59
60    return new_string
61
62def make_complete_mar_name(target_dir, filename_prefix):
63    filename = filename_prefix + "_complete.mar"
64    return os.path.join(target_dir, filename)
65