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Experimental support for pip dependencies
In the absence of an external interface to pip's resolver (see e.g. pypa/pip#7819), this uses Poetry's resolution logic to convert pip requirements from environment.yaml to either transitive dependencies (in the case of env output) or direct references (in the case of explicit output). In explicit mode these are emitted as comment lines that `conda-lock install` can unpack and pass to `pip install` inside of the target environment.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,197 @@ | ||
| import re | ||
| import sys | ||
|
|
||
| from pathlib import Path | ||
| from typing import Optional, TypedDict | ||
| from urllib.parse import urldefrag | ||
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| from clikit.api.io.flags import VERY_VERBOSE | ||
| from clikit.io import ConsoleIO | ||
| from packaging.tags import compatible_tags, cpython_tags | ||
| from poetry.core.packages import Dependency, Package, ProjectPackage, URLDependency | ||
| from poetry.installation.chooser import Chooser | ||
| from poetry.installation.operations import Install | ||
| from poetry.installation.operations.uninstall import Uninstall | ||
| from poetry.puzzle import Solver | ||
| from poetry.repositories.pool import Pool | ||
| from poetry.repositories.pypi_repository import PyPiRepository | ||
| from poetry.repositories.repository import Repository | ||
| from poetry.utils.env import Env | ||
|
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| from conda_lock.src_parser.pyproject_toml import get_lookup as get_forward_lookup | ||
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| class PlatformEnv(Env): | ||
| def __init__(self, python_version, platform): | ||
| super().__init__(path=Path(sys.prefix)) | ||
| if platform == "linux-64": | ||
| # FIXME: in principle these depend on the glibc in the conda env | ||
| self._platforms = ["manylinux_2_17_x86_64", "manylinux2014_x86_64"] | ||
| else: | ||
| raise ValueError(f"Unsupported platform '{platform}'") | ||
| self._python_version = tuple(map(int, python_version.split("."))) | ||
|
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| def get_supported_tags(self): | ||
| """ | ||
| Mimic the output of packaging.tags.sys_tags() on the given platform | ||
| """ | ||
| return list( | ||
| cpython_tags(python_version=self._python_version, platforms=self._platforms) | ||
| ) + list( | ||
| compatible_tags( | ||
| python_version=self._python_version, platforms=self._platforms | ||
| ) | ||
| ) | ||
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| class PipRequirement(TypedDict): | ||
| name: str | ||
| version: Optional[str] | ||
| url: str | ||
| hashes: list[str] | ||
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| REQUIREMENT_PATTERN = re.compile( | ||
| r""" | ||
| ^ | ||
| (?P<name>[a-zA-Z0-9_-]+) # package name | ||
| (?:\[(?P<extras>(?:\s?[a-zA-Z0-9_-]+(?:\s?\,\s?)?)+)\])? # extras | ||
| (?: | ||
| (?: # a direct reference | ||
| \s?@\s?(?P<url>.*) | ||
| ) | ||
| | | ||
| (?: # one or more PEP440 version specifiers | ||
| \s?(?P<constraint> | ||
| (?:\s? | ||
| (?: | ||
| (?:=|[><~=!])?= | ||
| | | ||
| [<>] | ||
| ) | ||
| \s? | ||
| (?: | ||
| [A-Za-z0-9\.-_\*]+ # a version tuple, e.g. x.y.z | ||
| (?:-[A-Za-z]+(?:\.[0-9]+)?)? # a post-release tag, e.g. -alpha.2 | ||
| (?:\s?\,\s?)? | ||
| ) | ||
| )+ | ||
| ) | ||
| ) | ||
| )? | ||
| $ | ||
| """, | ||
| re.VERBOSE, | ||
| ) | ||
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| def parse_pip_requirement(requirement: str) -> Optional[dict[str, str]]: | ||
| match = REQUIREMENT_PATTERN.match(requirement) | ||
| if not match: | ||
| return None | ||
| return match.groupdict() | ||
|
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|
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| def get_dependency(requirement: str) -> Dependency: | ||
| parsed = parse_pip_requirement(requirement) | ||
| if parsed is None: | ||
| raise ValueError(f"Unknown pip requirement '{requirement}'") | ||
| extras = re.split(r"\s?\,\s?", parsed["extras"]) if parsed["extras"] else None | ||
| if parsed["url"]: | ||
| return URLDependency(name=parsed["name"], url=parsed["url"], extras=extras) | ||
| else: | ||
| return Dependency( | ||
| name=parsed["name"], constraint=parsed["constraint"] or "*", extras=extras | ||
| ) | ||
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| PYPI_LOOKUP: Optional[dict] = None | ||
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| def get_lookup() -> dict: | ||
| global PYPI_LOOKUP | ||
| if PYPI_LOOKUP is None: | ||
| PYPI_LOOKUP = { | ||
| record["conda_name"]: record for record in get_forward_lookup().values() | ||
| } | ||
| return PYPI_LOOKUP | ||
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| def normalize_conda_name(name: str): | ||
| return get_lookup().get(name, {"pypi_name": name})["pypi_name"] | ||
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| def solve_pypi( | ||
| dependencies: list[str], | ||
| conda_installed: list[tuple[str, str]], | ||
| python_version: str, | ||
| platform: str, | ||
| verbose: bool = False, | ||
| ) -> list[PipRequirement]: | ||
| dummy_package = ProjectPackage("_dummy_package_", "0.0.0") | ||
| dummy_package.python_versions = f"=={python_version}" | ||
| for spec in dependencies: | ||
| dummy_package.add_dependency(get_dependency(spec)) | ||
|
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| pypi = PyPiRepository() | ||
| pool = Pool(repositories=[pypi]) | ||
|
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| installed = Repository() | ||
| locked = Repository() | ||
|
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| python_packages = dict() | ||
| for name, version in conda_installed: | ||
| pypi_name = normalize_conda_name(name) | ||
| # Prefer the Python package when its name collides with the Conda package | ||
| # for the underlying library, e.g. python-xxhash (pypi: xxhash) over xxhash | ||
| # (pypi: no equivalent) | ||
| if pypi_name not in python_packages or pypi_name != name: | ||
| python_packages[pypi_name] = version | ||
| for name, version in python_packages.items(): | ||
| for repo in (locked, installed): | ||
| repo.add_package(Package(name=name, version=version)) | ||
|
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| io = ConsoleIO() | ||
| if verbose: | ||
| io.set_verbosity(VERY_VERBOSE) | ||
| s = Solver( | ||
| dummy_package, | ||
| pool=pool, | ||
| installed=installed, | ||
| locked=locked, | ||
| io=io, | ||
| ) | ||
| result = s.solve(use_latest=dependencies) | ||
|
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| chooser = Chooser(pool, env=PlatformEnv(python_version, platform)) | ||
|
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| # Extract distributions from Poetry package plan, ignoring uninstalls | ||
| # (usually: conda package with no pypi equivalent) and skipped ops | ||
| # (already installed) | ||
| requirements: list[PipRequirement] = [] | ||
| for op in result: | ||
| if not isinstance(op, Uninstall) and not op.skipped: | ||
| # Take direct references verbatim | ||
| if op.package.source_type == "url": | ||
| url, fragment = urldefrag(op.package.source_url) | ||
| requirements.append( | ||
| { | ||
| "name": op.package.name, | ||
| "version": None, | ||
| "url": url, | ||
| "hashes": [fragment.replace("=", ":")], | ||
| } | ||
| ) | ||
| # Choose the most specific distribution for the target | ||
| else: | ||
| link = chooser.choose_for(op.package) | ||
| requirements.append( | ||
| { | ||
| "name": op.package.name, | ||
| "version": str(op.package.version), | ||
| "url": link.url_without_fragment, | ||
| "hashes": [f"{link.hash_name}:{link.hash}"], | ||
| } | ||
| ) | ||
|
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| return requirements |
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