mirror of https://github.com/pypa/pip
70 lines
2.0 KiB
Python
70 lines
2.0 KiB
Python
from __future__ import absolute_import
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import logging
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from .req_install import InstallRequirement
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from .req_set import RequirementSet
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from .req_file import parse_requirements
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from pip._internal.utils.logging import indent_log
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__all__ = [
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"RequirementSet", "InstallRequirement",
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"parse_requirements", "install_given_reqs",
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]
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logger = logging.getLogger(__name__)
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def install_given_reqs(to_install, install_options, global_options=(),
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*args, **kwargs):
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"""
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Install everything in the given list.
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(to be called after having downloaded and unpacked the packages)
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"""
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if to_install:
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logger.info(
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'Installing collected packages: %s',
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', '.join([req.name for req in to_install]),
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)
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with indent_log():
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for requirement in to_install:
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if requirement.conflicts_with:
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logger.info(
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'Found existing installation: %s',
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requirement.conflicts_with,
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)
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with indent_log():
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uninstalled_pathset = requirement.uninstall(
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auto_confirm=True
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)
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try:
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requirement.install(
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install_options,
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global_options,
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*args,
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**kwargs
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)
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except Exception:
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should_rollback = (
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requirement.conflicts_with and
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not requirement.install_succeeded
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)
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# if install did not succeed, rollback previous uninstall
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if should_rollback:
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uninstalled_pathset.rollback()
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raise
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else:
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should_commit = (
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requirement.conflicts_with and
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requirement.install_succeeded
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)
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if should_commit:
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uninstalled_pathset.commit()
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requirement.remove_temporary_source()
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return to_install
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