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import ast |
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import json |
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import textwrap |
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from pathlib import Path |
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def iter_namespace_pkgs(namespace): |
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parts = namespace.split(".") |
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for i in range(len(parts)): |
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yield ".".join(parts[: i + 1]) |
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def build_namespace_package(tmpdir, name, version="1.0", impl="pkg_resources"): |
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src_dir = tmpdir / name |
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src_dir.mkdir() |
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setup_py = src_dir / 'setup.py' |
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namespace, _, rest = name.rpartition('.') |
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namespaces = list(iter_namespace_pkgs(namespace)) |
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setup_args = { |
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"name": name, |
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"version": version, |
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"packages": namespaces, |
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} |
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if impl == "pkg_resources": |
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tmpl = '__import__("pkg_resources").declare_namespace(__name__)' |
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setup_args["namespace_packages"] = namespaces |
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elif impl == "pkgutil": |
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tmpl = '__path__ = __import__("pkgutil").extend_path(__path__, __name__)' |
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else: |
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raise ValueError(f"Cannot recognise {impl=} when creating namespaces") |
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args = json.dumps(setup_args, indent=4) |
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assert ast.literal_eval(args) |
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script = textwrap.dedent( |
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"""\ |
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import setuptools |
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args = {args} |
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setuptools.setup(**args) |
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""" |
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).format(args=args) |
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setup_py.write_text(script, encoding='utf-8') |
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ns_pkg_dir = Path(src_dir, namespace.replace(".", "/")) |
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ns_pkg_dir.mkdir(parents=True) |
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for ns in namespaces: |
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pkg_init = src_dir / ns.replace(".", "/") / '__init__.py' |
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pkg_init.write_text(tmpl, encoding='utf-8') |
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pkg_mod = ns_pkg_dir / (rest + '.py') |
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some_functionality = 'name = {rest!r}'.format(**locals()) |
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pkg_mod.write_text(some_functionality, encoding='utf-8') |
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return src_dir |
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def build_pep420_namespace_package(tmpdir, name): |
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src_dir = tmpdir / name |
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src_dir.mkdir() |
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pyproject = src_dir / "pyproject.toml" |
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namespace, _, rest = name.rpartition(".") |
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script = f"""\ |
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[build-system] |
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requires = ["setuptools"] |
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build-backend = "setuptools.build_meta" |
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[project] |
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name = "{name}" |
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version = "3.14159" |
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""" |
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pyproject.write_text(textwrap.dedent(script), encoding='utf-8') |
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ns_pkg_dir = Path(src_dir, namespace.replace(".", "/")) |
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ns_pkg_dir.mkdir(parents=True) |
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pkg_mod = ns_pkg_dir / (rest + ".py") |
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some_functionality = f"name = {rest!r}" |
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pkg_mod.write_text(some_functionality, encoding='utf-8') |
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return src_dir |
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def make_site_dir(target): |
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""" |
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Add a sitecustomize.py module in target to cause |
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target to be added to site dirs such that .pth files |
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are processed there. |
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""" |
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sc = target / 'sitecustomize.py' |
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target_str = str(target) |
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tmpl = '__import__("site").addsitedir({target_str!r})' |
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sc.write_text(tmpl.format(**locals()), encoding='utf-8') |
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