95 lines
2.7 KiB
Python
95 lines
2.7 KiB
Python
import collections
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import logging
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from typing import Generator, List, Optional, Sequence, Tuple
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from pip._internal.utils.logging import indent_log
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from .req_file import parse_requirements
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from .req_install import InstallRequirement
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from .req_set import RequirementSet
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__all__ = [
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"RequirementSet",
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"InstallRequirement",
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"parse_requirements",
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"install_given_reqs",
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]
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logger = logging.getLogger(__name__)
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class InstallationResult:
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def __init__(self, name: str) -> None:
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self.name = name
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def __repr__(self) -> str:
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return f"InstallationResult(name={self.name!r})"
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def _validate_requirements(
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requirements: List[InstallRequirement],
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) -> Generator[Tuple[str, InstallRequirement], None, None]:
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for req in requirements:
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assert req.name, f"invalid to-be-installed requirement: {req}"
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yield req.name, req
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def install_given_reqs(
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requirements: List[InstallRequirement],
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install_options: List[str],
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global_options: Sequence[str],
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root: Optional[str],
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home: Optional[str],
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prefix: Optional[str],
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warn_script_location: bool,
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use_user_site: bool,
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pycompile: bool,
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) -> List[InstallationResult]:
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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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to_install = collections.OrderedDict(_validate_requirements(requirements))
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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(to_install.keys()),
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)
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installed = []
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with indent_log():
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for req_name, requirement in to_install.items():
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if requirement.should_reinstall:
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logger.info("Attempting uninstall: %s", req_name)
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with indent_log():
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uninstalled_pathset = requirement.uninstall(auto_confirm=True)
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else:
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uninstalled_pathset = None
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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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root=root,
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home=home,
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prefix=prefix,
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warn_script_location=warn_script_location,
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use_user_site=use_user_site,
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pycompile=pycompile,
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)
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except Exception:
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# if install did not succeed, rollback previous uninstall
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if uninstalled_pathset and not requirement.install_succeeded:
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uninstalled_pathset.rollback()
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raise
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else:
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if uninstalled_pathset and requirement.install_succeeded:
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uninstalled_pathset.commit()
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installed.append(InstallationResult(req_name))
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return installed
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