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annotate lib/python3.8/site-packages/wheel/metadata.py @ 0:9e54283cc701 draft

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"planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
author guerler
date Mon, 27 Jul 2020 03:47:31 -0400
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1 """
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2 Tools for converting old- to new-style metadata.
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3 """
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4
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5 import os.path
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6 import re
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7 import textwrap
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8
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9 import pkg_resources
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10
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11 from .pkginfo import read_pkg_info
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12
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13 # Support markers syntax with the extra at the end only
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14 EXTRA_RE = re.compile(
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15 r"""^(?P<package>.*?)(;\s*(?P<condition>.*?)(extra == '(?P<extra>.*?)')?)$""")
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16
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17
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18 def requires_to_requires_dist(requirement):
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19 """Return the version specifier for a requirement in PEP 345/566 fashion."""
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20 if getattr(requirement, 'url', None):
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21 return " @ " + requirement.url
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22
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23 requires_dist = []
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24 for op, ver in requirement.specs:
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25 requires_dist.append(op + ver)
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26 if not requires_dist:
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27 return ''
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28 return " (%s)" % ','.join(sorted(requires_dist))
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29
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30
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31 def convert_requirements(requirements):
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32 """Yield Requires-Dist: strings for parsed requirements strings."""
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33 for req in requirements:
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34 parsed_requirement = pkg_resources.Requirement.parse(req)
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35 spec = requires_to_requires_dist(parsed_requirement)
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36 extras = ",".join(sorted(parsed_requirement.extras))
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37 if extras:
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38 extras = "[%s]" % extras
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39 yield (parsed_requirement.project_name + extras + spec)
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40
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41
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42 def generate_requirements(extras_require):
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43 """
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44 Convert requirements from a setup()-style dictionary to ('Requires-Dist', 'requirement')
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45 and ('Provides-Extra', 'extra') tuples.
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46
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47 extras_require is a dictionary of {extra: [requirements]} as passed to setup(),
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48 using the empty extra {'': [requirements]} to hold install_requires.
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49 """
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50 for extra, depends in extras_require.items():
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51 condition = ''
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52 extra = extra or ''
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53 if ':' in extra: # setuptools extra:condition syntax
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54 extra, condition = extra.split(':', 1)
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55
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56 extra = pkg_resources.safe_extra(extra)
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57 if extra:
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58 yield 'Provides-Extra', extra
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59 if condition:
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60 condition = "(" + condition + ") and "
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61 condition += "extra == '%s'" % extra
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62
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63 if condition:
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64 condition = ' ; ' + condition
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65
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66 for new_req in convert_requirements(depends):
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67 yield 'Requires-Dist', new_req + condition
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68
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69
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70 def pkginfo_to_metadata(egg_info_path, pkginfo_path):
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71 """
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72 Convert .egg-info directory with PKG-INFO to the Metadata 2.1 format
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73 """
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74 pkg_info = read_pkg_info(pkginfo_path)
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75 pkg_info.replace_header('Metadata-Version', '2.1')
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76 # Those will be regenerated from `requires.txt`.
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77 del pkg_info['Provides-Extra']
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78 del pkg_info['Requires-Dist']
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79 requires_path = os.path.join(egg_info_path, 'requires.txt')
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80 if os.path.exists(requires_path):
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81 with open(requires_path) as requires_file:
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82 requires = requires_file.read()
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83
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84 parsed_requirements = sorted(pkg_resources.split_sections(requires),
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85 key=lambda x: x[0] or '')
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86 for extra, reqs in parsed_requirements:
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87 for key, value in generate_requirements({extra: reqs}):
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88 if (key, value) not in pkg_info.items():
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89 pkg_info[key] = value
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90
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91 description = pkg_info['Description']
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92 if description:
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93 pkg_info.set_payload(dedent_description(pkg_info))
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94 del pkg_info['Description']
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95
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96 return pkg_info
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97
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98
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99 def pkginfo_unicode(pkg_info, field):
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100 """Hack to coax Unicode out of an email Message() - Python 3.3+"""
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101 text = pkg_info[field]
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102 field = field.lower()
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103 if not isinstance(text, str):
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104 for item in pkg_info.raw_items():
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105 if item[0].lower() == field:
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106 text = item[1].encode('ascii', 'surrogateescape') \
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107 .decode('utf-8')
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108 break
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109
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110 return text
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111
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112
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113 def dedent_description(pkg_info):
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114 """
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115 Dedent and convert pkg_info['Description'] to Unicode.
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116 """
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117 description = pkg_info['Description']
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118
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119 # Python 3 Unicode handling, sorta.
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120 surrogates = False
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121 if not isinstance(description, str):
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122 surrogates = True
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123 description = pkginfo_unicode(pkg_info, 'Description')
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124
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125 description_lines = description.splitlines()
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126 description_dedent = '\n'.join(
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
127 # if the first line of long_description is blank,
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
128 # the first line here will be indented.
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
129 (description_lines[0].lstrip(),
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
130 textwrap.dedent('\n'.join(description_lines[1:])),
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
131 '\n'))
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
132
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
133 if surrogates:
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
134 description_dedent = description_dedent \
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
135 .encode("utf8") \
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
136 .decode("ascii", "surrogateescape")
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
137
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
138 return description_dedent