API: Disk templates, persist original values

pkgs/clan-cli/clan_cli/api/disk.py

@@ -3,7 +3,7 @@ import logging
 from collections.abc import Callable
 from dataclasses import dataclass
 from pathlib import Path
-from typing import Any
+from typing import Any, TypedDict
 from uuid import uuid4
 
 from clan_cli.api import API
@@ -124,6 +124,11 @@ def get_disk_schemas(
     return disk_schemas
 
 
+class MachineDiskMatter(TypedDict):
+    schema_name: str
+    placeholders: dict[str, str]
+
+
 @API.register
 def set_machine_disk_schema(
     base_path: Path,
@@ -134,7 +139,7 @@ def set_machine_disk_schema(
     placeholders: dict[str, str],
     force: bool = False,
 ) -> None:
-    """ "
+    """
     Set the disk placeholders of the template
     """
     # Assert the hw-config must exist before setting the disk
@@ -183,8 +188,13 @@ def set_machine_disk_schema(
             )
             raise ClanError(msg, description=f"Valid options: {ph.options}")
 
+    placeholders_toml = "\n".join(
+        [f"""# {k} = "{v}""" for k, v in placeholders.items() if v is not None]
+    )
     header = f"""# ---
 # schema = "{schema_name}"
+# [placeholders]
+{placeholders_toml}
 # ---
 # This file was automatically generated!
 # CHANGING this configuration requires wiping and reinstalling the machine

pkgs/clan-cli/clan_cli/machines/list.py

@@ -6,6 +6,7 @@ from pathlib import Path
 from typing import Literal
 
 from clan_cli.api import API
+from clan_cli.api.disk import MachineDiskMatter
 from clan_cli.api.modules import parse_frontmatter
 from clan_cli.api.serde import dataclass_to_dict
 from clan_cli.cmd import RunOpts, run_no_stdout
@@ -41,7 +42,7 @@ def list_inventory_machines(flake_url: str | Path) -> dict[str, Machine]:
 class MachineDetails:
     machine: Machine
     hw_config: HardwareConfig | None = None
-    disk_schema: str | None = None
+    disk_schema: MachineDiskMatter | None = None
 
 
 import re
@@ -69,7 +70,7 @@ def get_inventory_machine_details(flake_url: Path, machine_name: str) -> Machine
     hw_config = HardwareConfig.detect_type(flake_url, machine_name)
 
     machine_dir = specific_machine_dir(flake_url, machine_name)
-    disk_schema: str | None = None
+    disk_schema: MachineDiskMatter | None = None
     disk_path = machine_dir / "disko.nix"
     if disk_path.exists():
         with disk_path.open() as f:
@@ -77,7 +78,7 @@ def get_inventory_machine_details(flake_url: Path, machine_name: str) -> Machine
             header = extract_header(content)
             data, _rest = parse_frontmatter(header)
             if data:
-                disk_schema = data.get("schema")
+                disk_schema = data  # type: ignore
 
     return MachineDetails(machine=machine, hw_config=hw_config, disk_schema=disk_schema)