inventory tests: generalize update-vars.py

... and move to pkgs/scripts/

pkgs/scripts/update-vars.py

@@ -0,0 +1,127 @@
+#! /usr/bin/env python3
+
+import json
+import os
+import subprocess
+from pathlib import Path
+from typing import Any
+
+from clan_cli.flake import Flake
+from clan_cli.machines.machines import Machine
+from clan_cli.nix import nix_build, nix_config, nix_eval
+from clan_cli.vars.generate import generate_vars
+from clan_cli.vars.keygen import keygen
+
+if _project_root := os.environ.get("PRJ_ROOT"):
+    clan_core_dir = Path(_project_root)
+else:
+    msg = "PRJ_ROOT not set. Enter the dev environment first"
+    raise Exception(msg)  # noqa TRY002
+
+test_name = "dummy-inventory-test"
+
+
+def _test_dir(test_name: str) -> Path:
+    return Path(clan_core_dir / "checks" / test_name)
+
+
+def machine_names(test_name: str) -> list[str]:
+    """
+    Get the machine names from the test flake
+    """
+    cmd = nix_eval(
+        [
+            f"{clan_core_dir}#checks.{nix_config()['system']}.{test_name}.nodes",
+            "--apply",
+            "builtins.attrNames",
+        ]
+    )
+    out = subprocess.run(cmd, check=True, text=True, stdout=subprocess.PIPE)
+    return json.loads(out.stdout.strip())
+
+
+class TestMachine(Machine):
+    """
+    Machine class which is able to deal with not having an actual flake.
+    All nix build and eval calls will be forwarded to:
+      clan-core#checks.<system>.<test_name>.nodes.<machine_name>.<attr>
+    """
+
+    @property
+    def deployment(self) -> dict:
+        if getattr(self, "_deployment", None):
+            return self._deployment
+        cmd = nix_build(
+            [
+                f"{clan_core_dir}#checks.{nix_config()['system']}.{test_name}.nodes.{self.name}.system.clan.deployment.file"
+            ]
+        )
+        out = subprocess.run(cmd, check=True, text=True, stdout=subprocess.PIPE)
+        self._deployment = json.loads(Path(out.stdout.strip()).read_text())
+        return self._deployment
+
+    def eval_nix(
+        self,
+        attr: str,
+        refresh: bool = False,
+        extra_config: None | dict = None,
+        nix_options: list[str] | None = None,
+    ) -> Any:
+        """
+        eval a nix attribute of the machine
+        @attr: the attribute to get
+        """
+
+        if nix_options is None:
+            nix_options = []
+
+        # return self.nix("eval", attr, nix_options)
+        cmd = nix_eval(
+            [
+                f"{clan_core_dir}#checks.{nix_config()['system']}.{test_name}.nodes.{self.name}.{attr}"
+            ]
+        )
+        out = subprocess.run(cmd, check=True, text=True, stdout=subprocess.PIPE)
+        return json.loads(out.stdout.strip())
+
+    def build_nix(
+        self,
+        attr: str,
+        extra_config: None | dict = None,
+        nix_options: list[str] | None = None,
+    ) -> Path:
+        """
+        build a nix attribute of the machine
+        @attr: the attribute to get
+        """
+
+        if nix_options is None:
+            nix_options = []
+
+        cmd = nix_build(
+            [
+                f"{clan_core_dir}#checks.{nix_config()['system']}.{test_name}.nodes.{self.name}.{attr}"
+            ]
+        )
+        out = subprocess.run(cmd, check=True, text=True, stdout=subprocess.PIPE)
+        return Path(out.stdout.strip())
+
+    def flush_caches(self) -> None:
+        """
+        Disable flush, because it calls prefetch() which resets the overridden Flake._path
+        """
+        return
+
+
+if __name__ == "__main__":
+    os.environ["CLAN_NO_COMMIT"] = "1"
+    test_dir = _test_dir(test_name)
+    subprocess.run(["rm", "-rf", f"{test_dir}/vars", f"{test_dir}/sops"])
+    flake = Flake(str(test_dir))
+    flake._path = test_dir  # noqa SLF001
+    flake._is_local = True  # noqa SLF001
+    machines = [TestMachine(name, flake) for name in machine_names(test_name)]
+    user = "admin"
+    if not Path(flake.path / "sops" / "users" / user / "key.json").exists():
+        keygen(user, flake, False)
+    generate_vars(list(machines))