clan-cli: init machine from inventory

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

@@ -194,7 +194,7 @@ def install_command(args: argparse.Namespace) -> None:
 
         if not args.yes:
             ask = input(
-                f"Install {args.machine} to {machine.target_host_address}? [y/N] "
+                f"Install {args.machine} to {machine.target_host().target}? [y/N] "
             )
             if ask != "y":
                 return None

pkgs/clan-cli/clan_lib/api/network.py

@@ -21,7 +21,8 @@ class ConnectionOptions:
 def check_machine_online(
     machine: Machine, opts: ConnectionOptions | None = None
 ) -> Literal["Online", "Offline"]:
-    hostname = machine.target_host_address
+    hostname = machine.target_host().target
+
     if not hostname:
         msg = f"Machine {machine.name} does not specify a targetHost"
         raise ClanError(msg)

pkgs/clan-cli/clan_lib/machines/machines.py

@@ -5,16 +5,19 @@ import re
 from dataclasses import dataclass, field
 from functools import cached_property
 from pathlib import Path
-from typing import TYPE_CHECKING, Any
+from typing import TYPE_CHECKING, Any, Literal
 
 from clan_cli.facts import public_modules as facts_public_modules
 from clan_cli.facts import secret_modules as facts_secret_modules
 from clan_cli.ssh.host_key import HostKeyCheck
 from clan_cli.vars._types import StoreBase
 
+from clan_lib.api import API
 from clan_lib.errors import ClanCmdError, ClanError
 from clan_lib.flake import Flake
 from clan_lib.nix import nix_config, nix_test_store
+from clan_lib.nix_models.clan import InventoryMachine
+from clan_lib.persist.inventory_store import InventoryStore
 from clan_lib.ssh.remote import Remote
 
 log = logging.getLogger(__name__)
@@ -34,6 +37,18 @@ class Machine:
     private_key: Path | None = None
     host_key_check: HostKeyCheck = HostKeyCheck.STRICT
 
+    def get_inv_machine(self) -> "InventoryMachine":
+        inventory_store = InventoryStore(flake=self.flake)
+        inv = inventory_store.read()
+
+        inv_machine = inv.get("machines", {}).get(self.name, None)
+
+        if inv_machine is None:
+            msg = f"Machine '{self.name}' not found in clan"
+            raise ClanError(msg, description="Check your inventory configuration.")
+
+        return inv_machine
+
     def get_id(self) -> str:
         return f"{self.flake}#{self.name}"
 
@@ -54,6 +69,10 @@ class Machine:
         kwargs.update({"extra": {"command_prefix": self.name}})
         log.info(msg, *args, **kwargs)
 
+    def warn(self, msg: str, *args: Any, **kwargs: Any) -> None:
+        kwargs.update({"extra": {"command_prefix": self.name}})
+        log.warning(msg, *args, **kwargs)
+
     def error(self, msg: str, *args: Any, **kwargs: Any) -> None:
         kwargs.update({"extra": {"command_prefix": self.name}})
         log.error(msg, *args, **kwargs)
@@ -83,17 +102,6 @@ class Machine:
         )
         return deployment
 
-    @property
-    def target_host_address(self) -> str:
-        val = self.override_target_host or self.deployment.get("targetHost")
-        if val is None:
-            msg = f"'targetHost' is not set for machine '{self.name}'"
-            raise ClanError(
-                msg,
-                description="See https://docs.clan.lol/guides/getting-started/deploy/#setting-the-target-host for more information.",
-            )
-        return val
-
     @cached_property
     def secret_facts_store(self) -> facts_secret_modules.SecretStoreBase:
         module = importlib.import_module(self.deployment["facts"]["secretModule"])
@@ -144,30 +152,40 @@ class Machine:
         return self.flake.path
 
     def target_host(self) -> Remote:
+        if self.override_target_host:
             return Remote.from_deployment_address(
                 machine_name=self.name,
-            address=self.target_host_address,
+                address=self.override_target_host,
                 host_key_check=self.host_key_check,
                 private_key=self.private_key,
             )
 
+        remote = get_target_host(self.name, self.flake)
+        if remote is None:
+            msg = f"'targetHost' is not set for machine '{self.name}'"
+            raise ClanError(
+                msg,
+                description="See https://docs.clan.lol/guides/getting-started/deploy/#setting-the-target-host for more information.",
+            )
+        return remote.data
+
     def build_host(self) -> Remote | None:
         """
         The host where the machine is built and deployed from.
         Can be the same as the target host.
         """
-        address = self.override_build_host or self.deployment.get("buildHost")
-        if address is None:
-            return None
-        # enable ssh agent forwarding to allow the build host to access the target host
-        host = Remote.from_deployment_address(
+
+        if self.override_build_host:
+            return Remote.from_deployment_address(
                 machine_name=self.name,
-            address=address,
+                address=self.override_build_host,
                 host_key_check=self.host_key_check,
-            forward_agent=True,
                 private_key=self.private_key,
             )
-        return host
+
+        remote = get_build_host(self)
+
+        return remote.data if remote else None
 
     def nix(
         self,
@@ -234,3 +252,73 @@ class Machine:
             return output
         msg = "build_nix returned not a Path"
         raise ClanError(msg)
+
+
+@dataclass(frozen=True)
+class RemoteSource:
+    data: Remote
+    source: Literal["inventory", "nix_machine"]
+
+
+@API.register
+def get_target_host(name: str, flake: Flake) -> RemoteSource | None:
+    """
+    Get the build host for a machine.
+    """
+    machine = Machine(name=name, flake=flake)
+    inv_machine = machine.get_inv_machine()
+
+    source = "inventory"
+    target_host_str = inv_machine.get("deploy", {}).get("targetHost")
+
+    if target_host_str is None:
+        machine.info(
+            "'targetHost' is not set in inventory, falling back to slow Nix config"
+        )
+        target_host_str = machine.eval_nix("config.clan.core.networking.targetHost")
+        source = "nix_machine"
+
+    if not target_host_str:
+        return None
+
+    return RemoteSource(
+        data=Remote.from_deployment_address(
+            machine_name=machine.name,
+            address=target_host_str,
+            host_key_check=machine.host_key_check,
+            private_key=machine.private_key,
+        ),
+        source=source,
+    )
+
+
+@API.register
+def get_build_host(name: str, flake: Flake) -> RemoteSource | None:
+    """
+    Get the build host for a machine.
+    """
+    machine = Machine(name=name, flake=flake)
+    inv_machine = machine.get_inv_machine()
+
+    source = "inventory"
+    target_host_str = inv_machine.get("deploy", {}).get("buildHost")
+
+    if target_host_str is None:
+        machine.info(
+            "'buildHost' is not set in inventory, falling back to slow Nix config"
+        )
+        target_host_str = machine.eval_nix("config.clan.core.networking.buildHost")
+        source = "nix_machine"
+
+    if not target_host_str:
+        return None
+
+    return RemoteSource(
+        data=Remote.from_deployment_address(
+            machine_name=machine.name,
+            address=target_host_str,
+            host_key_check=machine.host_key_check,
+            private_key=machine.private_key,
+        ),
+        source=source,
+    )