Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/pip/_vendor/packaging/utils.py: 24%

1# This file is dual licensed under the terms of the Apache License, Version 

2# 2.0, and the BSD License. See the LICENSE file in the root of this repository 

3# for complete details. 

4 

5import re 

6from typing import FrozenSet, NewType, Tuple, Union, cast 

7 

8from .tags import Tag, parse_tag 

9from .version import InvalidVersion, Version 

10 

11BuildTag = Union[Tuple[()], Tuple[int, str]] 

12NormalizedName = NewType("NormalizedName", str) 

13 

14 

15class InvalidWheelFilename(ValueError): 

16 """ 

17 An invalid wheel filename was found, users should refer to PEP 427. 

18 """ 

19 

20 

21class InvalidSdistFilename(ValueError): 

22 """ 

23 An invalid sdist filename was found, users should refer to the packaging user guide. 

24 """ 

25 

26 

27_canonicalize_regex = re.compile(r"[-_.]+") 

28# PEP 427: The build number must start with a digit. 

29_build_tag_regex = re.compile(r"(\d+)(.*)") 

30 

31 

32def canonicalize_name(name: str) -> NormalizedName: 

33 # This is taken from PEP 503. 

34 value = _canonicalize_regex.sub("-", name).lower() 

35 return cast(NormalizedName, value) 

36 

37 

38def canonicalize_version(version: Union[Version, str]) -> str: 

39 """ 

40 This is very similar to Version.__str__, but has one subtle difference 

41 with the way it handles the release segment. 

42 """ 

43 if isinstance(version, str): 

44 try: 

45 parsed = Version(version) 

46 except InvalidVersion: 

47 # Legacy versions cannot be normalized 

48 return version 

49 else: 

50 parsed = version 

51 

52 parts = [] 

53 

54 # Epoch 

55 if parsed.epoch != 0: 

56 parts.append(f"{parsed.epoch}!") 

57 

58 # Release segment 

59 # NB: This strips trailing '.0's to normalize 

60 parts.append(re.sub(r"(\.0)+$", "", ".".join(str(x) for x in parsed.release))) 

61 

62 # Pre-release 

63 if parsed.pre is not None: 

64 parts.append("".join(str(x) for x in parsed.pre)) 

65 

66 # Post-release 

67 if parsed.post is not None: 

68 parts.append(f".post{parsed.post}") 

69 

70 # Development release 

71 if parsed.dev is not None: 

72 parts.append(f".dev{parsed.dev}") 

73 

74 # Local version segment 

75 if parsed.local is not None: 

76 parts.append(f"+{parsed.local}") 

77 

78 return "".join(parts) 

79 

80 

81def parse_wheel_filename( 

82 filename: str, 

83) -> Tuple[NormalizedName, Version, BuildTag, FrozenSet[Tag]]: 

84 if not filename.endswith(".whl"): 

85 raise InvalidWheelFilename( 

86 f"Invalid wheel filename (extension must be '.whl'): {filename}" 

87 ) 

88 

89 filename = filename[:-4] 

90 dashes = filename.count("-") 

91 if dashes not in (4, 5): 

92 raise InvalidWheelFilename( 

93 f"Invalid wheel filename (wrong number of parts): {filename}" 

94 ) 

95 

96 parts = filename.split("-", dashes - 2) 

97 name_part = parts[0] 

98 # See PEP 427 for the rules on escaping the project name 

99 if "__" in name_part or re.match(r"^[\w\d._]*$", name_part, re.UNICODE) is None: 

100 raise InvalidWheelFilename(f"Invalid project name: {filename}") 

101 name = canonicalize_name(name_part) 

102 version = Version(parts[1]) 

103 if dashes == 5: 

104 build_part = parts[2] 

105 build_match = _build_tag_regex.match(build_part) 

106 if build_match is None: 

107 raise InvalidWheelFilename( 

108 f"Invalid build number: {build_part} in '{filename}'" 

109 ) 

110 build = cast(BuildTag, (int(build_match.group(1)), build_match.group(2))) 

111 else: 

112 build = () 

113 tags = parse_tag(parts[-1]) 

114 return (name, version, build, tags) 

115 

116 

117def parse_sdist_filename(filename: str) -> Tuple[NormalizedName, Version]: 

118 if filename.endswith(".tar.gz"): 

119 file_stem = filename[: -len(".tar.gz")] 

120 elif filename.endswith(".zip"): 

121 file_stem = filename[: -len(".zip")] 

122 else: 

123 raise InvalidSdistFilename( 

124 f"Invalid sdist filename (extension must be '.tar.gz' or '.zip'):" 

125 f" {filename}" 

126 ) 

127 

128 # We are requiring a PEP 440 version, which cannot contain dashes, 

129 # so we split on the last dash. 

130 name_part, sep, version_part = file_stem.rpartition("-") 

131 if not sep: 

132 raise InvalidSdistFilename(f"Invalid sdist filename: {filename}") 

133 

134 name = canonicalize_name(name_part) 

135 version = Version(version_part) 

136 return (name, version)