clanModules/state-version: init state-version

This adds a clanModule that will initialize the `system.stateVersion`
upon deploying the machine for the first time.

If the machine is completely reinstalled, then the state version might be
regenerated. But care should be taken if rebuilding from backups.

clanModules/flake-module.nix

@@ -21,6 +21,7 @@
     postgresql = ./postgresql;
     root-password = ./root-password;
     single-disk = ./single-disk;
+    state-version = ./state-version;
     sshd = ./sshd;
     static-hosts = ./static-hosts;
     sunshine = ./sunshine;

clanModules/state-version/README.md

@@ -0,0 +1,7 @@
+---
+description = "Automatically generate the state version of the nixos installation."
+---
+
+This module generates the `system.stateVersion` of the nixos installation automatically.
+
+Options: [system.stateVersion](https://search.nixos.org/options?channel=unstable&show=system.stateVersion&from=0&size=50&sort=relevance&type=packages&query=stateVersion)

clanModules/state-version/default.nix

@@ -1,7 +1,14 @@
 { config, lib, ... }:
+let
+  var = config.clan.core.vars.generators.state-version.files.version or { };
+in
 {
-  system.stateVersion = config.clan.core.vars.generators.state-version.files.version.value;
+  config = lib.mkMerge [
+    (lib.mkIf ((var.value or null) != null) {
+      system.stateVersion = lib.mkDefault (lib.removeSuffix "\n" var.value);
+    })
 
+    {
       clan.core.vars.generators.state-version = {
         files.version.secret = false;
         runtimeInputs = [ ];
@@ -9,4 +16,6 @@
           echo ${lib.versions.majorMinor lib.version} > $out/version
         '';
       };
+    }
+  ];
 }

clanModules/state-version/roles/default.nix

@@ -0,0 +1 @@
+{ }

docs/mkdocs.yml

@@ -60,24 +60,24 @@ nav:
           - reference/clanModules/borgbackup.md
           - reference/clanModules/deltachat.md
           - reference/clanModules/dyndns.md
-          - reference/clanModules/nginx.md
-          - reference/clanModules/vaultwarden.md
           - reference/clanModules/ergochat.md
           - reference/clanModules/garage.md
           - reference/clanModules/golem-provider.md
+          - reference/clanModules/heisenbridge.md
           - reference/clanModules/index.md
           - reference/clanModules/iwd.md
           - reference/clanModules/localbackup.md
           - reference/clanModules/localsend.md
           - reference/clanModules/matrix-synapse.md
-          - reference/clanModules/heisenbridge.md
           - reference/clanModules/moonlight.md
           - reference/clanModules/mumble.md
+          - reference/clanModules/nginx.md
           - reference/clanModules/packages.md
           - reference/clanModules/postgresql.md
           - reference/clanModules/root-password.md
           - reference/clanModules/single-disk.md
           - reference/clanModules/sshd.md
+          - reference/clanModules/state-version.md
           - reference/clanModules/static-hosts.md
           - reference/clanModules/sunshine.md
           - reference/clanModules/syncthing-static-peers.md
@@ -85,6 +85,7 @@ nav:
           - reference/clanModules/thelounge.md
           - reference/clanModules/trusted-nix-caches.md
           - reference/clanModules/user-password.md
+          - reference/clanModules/vaultwarden.md
           - reference/clanModules/xfce.md
           - reference/clanModules/zerotier-static-peers.md
           - reference/clanModules/zt-tcp-relay.md

pkgs/clan-cli/clan_cli/inventory/classes.py

@@ -218,6 +218,37 @@ class ServiceSingleDisk:
     machines: dict[str, ServiceSingleDiskMachine] = field(default_factory = dict)
 
 
+@dataclass
+class StateVersionConfig:
+    pass
+
+@dataclass
+class ServiceStateVersionMachine:
+    config: StateVersionConfig = field(default_factory = StateVersionConfig)
+    imports: list[str] = field(default_factory = list)
+
+
+@dataclass
+class ServiceStateVersionRoleDefault:
+    config: StateVersionConfig = field(default_factory = StateVersionConfig)
+    imports: list[str] = field(default_factory = list)
+    machines: list[str] = field(default_factory = list)
+    tags: list[str] = field(default_factory = list)
+
+
+@dataclass
+class ServiceStateVersionRole:
+    default: ServiceStateVersionRoleDefault
+
+
+@dataclass
+class ServiceStateVersion:
+    meta: ServiceMeta
+    roles: ServiceStateVersionRole
+    config: StateVersionConfig = field(default_factory = StateVersionConfig)
+    machines: dict[str, ServiceStateVersionMachine] = field(default_factory = dict)
+
+
 @dataclass
 class Service:
     admin: dict[str, ServiceAdmin] = field(default_factory = dict)
@@ -225,6 +256,7 @@ class Service:
     iwd: dict[str, ServiceIwd] = field(default_factory = dict)
     packages: dict[str, ServicePackage] = field(default_factory = dict)
     single_disk: dict[str, ServiceSingleDisk] = field(default_factory = dict, metadata = {"alias": "single-disk"})
+    state_version: dict[str, ServiceStateVersion] = field(default_factory = dict, metadata = {"alias": "state-version"})
 
 
 @dataclass