114 lines
2.9 KiB
Python
114 lines
2.9 KiB
Python
import json
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import os
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import tempfile
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from pathlib import Path
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from typing import Any
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from .cmd import run
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from .dirs import nixpkgs_flake, nixpkgs_source
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def nix_command(flags: list[str]) -> list[str]:
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return ["nix", "--extra-experimental-features", "nix-command flakes", *flags]
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def nix_flake_show(flake_url: str | Path) -> list[str]:
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return nix_command(
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[
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"flake",
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"show",
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"--json",
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"--show-trace",
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"--no-write-lock-file",
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f"{flake_url}",
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]
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)
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def nix_build(flags: list[str], gcroot: Path | None = None) -> list[str]:
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if gcroot is not None:
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return (
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nix_command(
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[
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"build",
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"--out-link",
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str(gcroot),
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"--print-out-paths",
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"--no-write-lock-file",
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]
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)
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+ flags
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)
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else:
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return (
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nix_command(
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[
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"build",
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"--no-link",
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"--print-out-paths",
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"--no-write-lock-file",
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]
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)
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+ flags
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)
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def nix_add_to_gcroots(nix_path: Path, dest: Path) -> None:
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cmd = ["nix-store", "--realise", f"{nix_path}", "--add-root", f"{dest}"]
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run(cmd)
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def nix_config() -> dict[str, Any]:
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cmd = nix_command(["show-config", "--json"])
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proc = run(cmd)
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data = json.loads(proc.stdout)
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config = {}
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for key, value in data.items():
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config[key] = value["value"]
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return config
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def nix_eval(flags: list[str]) -> list[str]:
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default_flags = nix_command(
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[
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"eval",
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"--show-trace",
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"--json",
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"--no-write-lock-file",
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]
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)
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if os.environ.get("IN_NIX_SANDBOX"):
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with tempfile.TemporaryDirectory() as nix_store:
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return [
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*default_flags,
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"--override-input",
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"nixpkgs",
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str(nixpkgs_source()),
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# --store is required to prevent this error:
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# error: cannot unlink '/nix/store/6xg259477c90a229xwmb53pdfkn6ig3g-default-builder.sh': Operation not permitted
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"--store",
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nix_store,
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*flags,
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]
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return default_flags + flags
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def nix_metadata(flake_url: str | Path) -> dict[str, Any]:
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cmd = nix_command(["flake", "metadata", "--json", f"{flake_url}"])
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proc = run(cmd)
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data = json.loads(proc.stdout)
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return data
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def nix_shell(packages: list[str], cmd: list[str]) -> list[str]:
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# we cannot use nix-shell inside the nix sandbox
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# in our tests we just make sure we have all the packages
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if os.environ.get("IN_NIX_SANDBOX"):
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return cmd
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return [
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*nix_command(["shell", "--offline", "--inputs-from", f"{nixpkgs_flake()!s}"]),
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*packages,
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"-c",
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*cmd,
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]
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