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annotate lib/python3.8/site-packages/pip/_vendor/pep517/build.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 """Build a project using PEP 517 hooks.
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2 """
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3 import argparse
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4 import logging
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5 import os
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6 import toml
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7 import shutil
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8
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9 from .envbuild import BuildEnvironment
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10 from .wrappers import Pep517HookCaller
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11 from .dirtools import tempdir, mkdir_p
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12 from .compat import FileNotFoundError
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13
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14 log = logging.getLogger(__name__)
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15
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16
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17 def validate_system(system):
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18 """
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19 Ensure build system has the requisite fields.
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20 """
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21 required = {'requires', 'build-backend'}
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22 if not (required <= set(system)):
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23 message = "Missing required fields: {missing}".format(
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24 missing=required-set(system),
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25 )
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26 raise ValueError(message)
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27
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28
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29 def load_system(source_dir):
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30 """
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31 Load the build system from a source dir (pyproject.toml).
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32 """
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33 pyproject = os.path.join(source_dir, 'pyproject.toml')
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34 with open(pyproject) as f:
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35 pyproject_data = toml.load(f)
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36 return pyproject_data['build-system']
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37
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38
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39 def compat_system(source_dir):
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40 """
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41 Given a source dir, attempt to get a build system backend
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42 and requirements from pyproject.toml. Fallback to
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43 setuptools but only if the file was not found or a build
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44 system was not indicated.
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45 """
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46 try:
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47 system = load_system(source_dir)
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48 except (FileNotFoundError, KeyError):
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49 system = {}
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50 system.setdefault(
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51 'build-backend',
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52 'setuptools.build_meta:__legacy__',
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53 )
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54 system.setdefault('requires', ['setuptools', 'wheel'])
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55 return system
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56
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57
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58 def _do_build(hooks, env, dist, dest):
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59 get_requires_name = 'get_requires_for_build_{dist}'.format(**locals())
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60 get_requires = getattr(hooks, get_requires_name)
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61 reqs = get_requires({})
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62 log.info('Got build requires: %s', reqs)
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63
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64 env.pip_install(reqs)
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65 log.info('Installed dynamic build dependencies')
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66
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67 with tempdir() as td:
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68 log.info('Trying to build %s in %s', dist, td)
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69 build_name = 'build_{dist}'.format(**locals())
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70 build = getattr(hooks, build_name)
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71 filename = build(td, {})
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72 source = os.path.join(td, filename)
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73 shutil.move(source, os.path.join(dest, os.path.basename(filename)))
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74
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75
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76 def build(source_dir, dist, dest=None, system=None):
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77 system = system or load_system(source_dir)
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78 dest = os.path.join(source_dir, dest or 'dist')
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79 mkdir_p(dest)
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80
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81 validate_system(system)
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82 hooks = Pep517HookCaller(
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83 source_dir, system['build-backend'], system.get('backend-path')
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84 )
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85
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86 with BuildEnvironment() as env:
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87 env.pip_install(system['requires'])
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88 _do_build(hooks, env, dist, dest)
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89
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90
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91 parser = argparse.ArgumentParser()
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92 parser.add_argument(
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93 'source_dir',
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94 help="A directory containing pyproject.toml",
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95 )
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96 parser.add_argument(
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97 '--binary', '-b',
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98 action='store_true',
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99 default=False,
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100 )
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101 parser.add_argument(
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102 '--source', '-s',
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103 action='store_true',
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104 default=False,
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105 )
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106 parser.add_argument(
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107 '--out-dir', '-o',
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108 help="Destination in which to save the builds relative to source dir",
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109 )
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110
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111
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112 def main(args):
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113 # determine which dists to build
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114 dists = list(filter(None, (
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115 'sdist' if args.source or not args.binary else None,
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116 'wheel' if args.binary or not args.source else None,
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117 )))
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118
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119 for dist in dists:
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120 build(args.source_dir, dist, args.out_dir)
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121
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122
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123 if __name__ == '__main__':
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124 main(parser.parse_args())