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annotate lib/python3.8/site-packages/pip/_internal/distributions/sdist.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 import logging
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2
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3 from pip._internal.build_env import BuildEnvironment
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4 from pip._internal.distributions.base import AbstractDistribution
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5 from pip._internal.exceptions import InstallationError
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6 from pip._internal.utils.subprocess import runner_with_spinner_message
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7 from pip._internal.utils.typing import MYPY_CHECK_RUNNING
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8
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9 if MYPY_CHECK_RUNNING:
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10 from typing import Set, Tuple
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11
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12 from pip._vendor.pkg_resources import Distribution
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13 from pip._internal.index.package_finder import PackageFinder
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14
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15
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16 logger = logging.getLogger(__name__)
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17
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18
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19 class SourceDistribution(AbstractDistribution):
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20 """Represents a source distribution.
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21
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22 The preparation step for these needs metadata for the packages to be
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23 generated, either using PEP 517 or using the legacy `setup.py egg_info`.
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24 """
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25
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26 def get_pkg_resources_distribution(self):
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27 # type: () -> Distribution
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28 return self.req.get_dist()
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29
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30 def prepare_distribution_metadata(self, finder, build_isolation):
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31 # type: (PackageFinder, bool) -> None
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32 # Load pyproject.toml, to determine whether PEP 517 is to be used
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33 self.req.load_pyproject_toml()
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34
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35 # Set up the build isolation, if this requirement should be isolated
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36 should_isolate = self.req.use_pep517 and build_isolation
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37 if should_isolate:
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38 self._setup_isolation(finder)
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39
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40 self.req.prepare_metadata()
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41
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42 def _setup_isolation(self, finder):
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43 # type: (PackageFinder) -> None
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44 def _raise_conflicts(conflicting_with, conflicting_reqs):
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45 # type: (str, Set[Tuple[str, str]]) -> None
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46 format_string = (
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47 "Some build dependencies for {requirement} "
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48 "conflict with {conflicting_with}: {description}."
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49 )
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50 error_message = format_string.format(
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51 requirement=self.req,
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52 conflicting_with=conflicting_with,
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53 description=', '.join(
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54 '{} is incompatible with {}'.format(installed, wanted)
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55 for installed, wanted in sorted(conflicting)
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56 )
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57 )
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58 raise InstallationError(error_message)
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59
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60 # Isolate in a BuildEnvironment and install the build-time
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61 # requirements.
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62 pyproject_requires = self.req.pyproject_requires
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63 assert pyproject_requires is not None
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64
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65 self.req.build_env = BuildEnvironment()
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66 self.req.build_env.install_requirements(
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67 finder, pyproject_requires, 'overlay',
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68 "Installing build dependencies"
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69 )
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70 conflicting, missing = self.req.build_env.check_requirements(
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71 self.req.requirements_to_check
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72 )
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73 if conflicting:
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74 _raise_conflicts("PEP 517/518 supported requirements",
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75 conflicting)
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76 if missing:
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77 logger.warning(
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78 "Missing build requirements in pyproject.toml for %s.",
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79 self.req,
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80 )
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81 logger.warning(
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82 "The project does not specify a build backend, and "
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83 "pip cannot fall back to setuptools without %s.",
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84 " and ".join(map(repr, sorted(missing)))
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85 )
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86 # Install any extra build dependencies that the backend requests.
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87 # This must be done in a second pass, as the pyproject.toml
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88 # dependencies must be installed before we can call the backend.
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89 with self.req.build_env:
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90 runner = runner_with_spinner_message(
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91 "Getting requirements to build wheel"
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92 )
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93 backend = self.req.pep517_backend
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94 assert backend is not None
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95 with backend.subprocess_runner(runner):
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96 reqs = backend.get_requires_for_build_wheel()
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97
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98 conflicting, missing = self.req.build_env.check_requirements(reqs)
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99 if conflicting:
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100 _raise_conflicts("the backend dependencies", conflicting)
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101 self.req.build_env.install_requirements(
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102 finder, missing, 'normal',
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103 "Installing backend dependencies"
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104 )