generated from Luis/nextjs-python-web-template
48 lines
1.5 KiB
Python
48 lines
1.5 KiB
Python
import json
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import subprocess
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import sys
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from pathlib import Path
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from typing import Optional
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from ..dirs import get_clan_flake_toplevel
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def schema_for_machine(machine_name: str, flake: Optional[Path] = None) -> dict:
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if flake is None:
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flake = get_clan_flake_toplevel()
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# use nix eval to read from .#clanModules.<module_name>.options
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proc = subprocess.run(
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[
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"nix",
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"eval",
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"--json",
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"--impure",
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"--show-trace",
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"--extra-experimental-features",
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"nix-command flakes",
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"--expr",
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f"""
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let
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flake = builtins.getFlake (toString {flake});
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lib = flake.inputs.nixpkgs.lib;
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module = builtins.trace (builtins.attrNames flake) flake.clanModules.machine-{machine_name};
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evaled = lib.evalModules {{
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modules = [module];
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}};
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clanOptions = evaled.options.clan;
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jsonschemaLib = import {Path(__file__).parent / "jsonschema"} {{ inherit lib; }};
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jsonschema = jsonschemaLib.parseOptions clanOptions;
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in
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jsonschema
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""",
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],
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capture_output=True,
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text=True,
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)
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if proc.returncode != 0:
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print(proc.stderr, file=sys.stderr)
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raise Exception(
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f"Failed to read schema for machine {machine_name}:\n{proc.stderr}"
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)
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return json.loads(proc.stdout)
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