from pathlib import Path
from textwrap import dedent
from pyodide_lock.spec import PackageSpec
def create_pypa_index(
packages: dict[str, PackageSpec], target_dir: Path, dist_url: str
) -> None:
"""Create a pip-compatible Python package (pypa) index to be used with a Pyodide virtual
environment.
To use, pass as an `--index-url` or `--extra-index-url` parameter to pip.
The argument should be a `file:` url pointing to the `pypa_index` folder (or
if you serve `pypa_index` it can be a normal url). It is also used
automatically by Pyodide virtual environments created from a release version
of Pyodide.
Parameters
----------
packages:
A dictionary of packages that we want to index. This should be the
"packages" field from pyodide-lock.json.
target_dir:
Where to put the index. It will be placed in a subfolder of
target_dir called `pypa_index`. `target_dir` should exist but
`target_dir/pypa_index` should not exist.
dist_url:
The CDN url to download packages from. This will be hard coded into the
generated index. If you wish to install from local files, then prefix
with `file:` e.g., `f"file:{pyodide_root}/dist"`.
"""
# We only want to index the wheels
packages = {
pkgname: pkginfo
for (pkgname, pkginfo) in packages.items()
if pkginfo.file_name.endswith(".whl")
}
if not target_dir.exists():
raise RuntimeError(f"target_dir={target_dir} does not exist")
index_dir = target_dir / "pypa_index"
if index_dir.exists():
raise RuntimeError(f"{index_dir} already exists")
index_dir.mkdir()
# Create top level index
packages_str = "\n".join(f'{x}' for x in packages.keys())
index_html = dedent(
f"""
Simple index
{packages_str}
"""
).strip()
(index_dir / "index.html").write_text(index_html)
files_template = dedent(
"""
Links for {pkgname}
Links for {pkgname}
{links}
"""
).strip()
for pkgname, pkginfo in packages.items():
pkgdir = index_dir / pkgname
filename = pkginfo.file_name
shasum = pkginfo.sha256
href = f"{dist_url}{filename}#sha256={shasum}"
links_str = f'{pkgname}\n'
files_html = files_template.format(pkgname=pkgname, links=links_str)
pkgdir.mkdir()
(pkgdir / "index.html").write_text(files_html)