INNER CODE UNIT · Python

render_environment

PKU-EMBL/BASALT · BASALT_setup_China_mainland.py:317

def render_environment(source: Path, destination: Path, channels: Sequence[str]) -> None:
    """Render a temporary environment file containing explicit channels."""
    lines = source.read_text(encoding="utf-8").splitlines()
    try:
        channel_start = next(
            index for index, line in enumerate(lines) if line.strip() == "channels:"
        )
        dependency_start = next(
            index
            for index, line in enumerate(lines[channel_start + 1 :], channel_start + 1)
            if line.strip() == "dependencies:"
        )
    except StopIteration as exc:
        raise InstallationError(
            "Invalid basalt_environment.yml: channels/dependencies section missing."
        ) from exc

    rendered = lines[:channel_start] + ["channels:"]

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