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from __future__ import annotations
import os
import warnings
from pathlib import Path
from editables import EditableProject
from packaging.utils import canonicalize_name
from pdm.backend.exceptions import ConfigError, PDMWarning
from pdm.backend.hooks.base import Context
from pdm.backend.utils import to_filename
from pdm.backend.wheel import WheelBuilder
def is_subpath(path: str, parent: str) -> bool:
return os.path.normcase(path).startswith(os.path.normcase(parent))
class EditableBuildHook:
def pdm_build_initialize(self, context: Context) -> None:
editables = self._prepare_editable(context)
context.config.metadata.setdefault("dependencies", []).extend(
editables.dependencies()
)
context.editables = editables
def pdm_build_update_files(self, context: Context, files: dict[str, Path]) -> None:
packages: list[str] = context.config.convert_package_paths()["packages"]
proxied = {p.replace(".", "/") for p in packages}
for relpath in list(files):
if os.path.splitext(relpath)[1] in (".py", ".pyc", ".pyo"):
# All .py[cod] files are proxied
del files[relpath]
elif any(is_subpath(relpath, p) for p in proxied):
# also exclude data files in proxied packages
del files[relpath]
editables: EditableProject = context.editables
context.ensure_build_dir()
for name, content in editables.files():
with open(os.path.join(context.build_dir, name), "w", newline="") as f:
f.write(content)
files[name] = context.build_dir.joinpath(name)
def _prepare_editable(self, context: Context) -> EditableProject:
config = context.config
try:
editables = EditableProject(
to_filename(canonicalize_name(config.metadata["name"])),
context.root.as_posix(),
)
except ValueError as e:
raise ConfigError(str(e)) from None
package_paths = config.convert_package_paths()
build_config = config.build_config
package_dir = build_config.package_dir
if build_config.editable_backend == "editables":
for package in package_paths.get("packages", []):
if "." in package:
continue
editables.map(package, os.path.join(package_dir, package))
for module in package_paths.get("py_modules", []):
if "." in module:
continue
patterns: tuple[str, ...] = (f"{module}.py",)
if os.name == "nt":
patterns += (f"{module}.*.pyd",)
else:
patterns += (f"{module}.*.so",)
for pattern in patterns:
path = next(Path(package_dir).glob(pattern), None)
if path:
editables.map(module, path.as_posix())
break
if not editables.redirections:
# For implicit namespace packages, modules cannot be mapped.
# Fallback to .pth method in this case.
if build_config.editable_backend == "editables":
warnings.warn(
"editables backend is not available for namespace packages, "
"fallback to path entries",
PDMWarning,
)
editables.add_to_path(package_dir)
return editables
class EditableBuilder(WheelBuilder):
target = "editable"
hooks = WheelBuilder.hooks + [EditableBuildHook()]
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