feat(snapshot-manager): migrate snapshot management to Rust

common/optional/zfs/default.nix

@@ -1,5 +1,4 @@
 {
-  inputs,
   lib,
   pkgs,
   ...
@@ -15,7 +14,6 @@
   services = {
     snapshot_manager = {
       enable = lib.mkDefault true;
-      PYTHONPATH = "${inputs.self}/";
     };
 
     zfs = {

common/optional/zfs/snapshot.nix

@@ -1,5 +1,4 @@
 {
-  inputs,
   pkgs,
   lib,
   config,
@@ -7,23 +6,18 @@
 }:
 let
   cfg = config.services.snapshot_manager;
-  snapshotManagerPackages = ps: with ps; [ typer ];
+  snapshotManager = pkgs.callPackage ../../../rust/snapshot_manager/package.nix { };
 in
 {
   options = {
     services.snapshot_manager = {
       enable = lib.mkEnableOption "ZFS snapshot manager";
+      signalAlerts = lib.mkEnableOption "Signal failure alerts for the snapshot manager";
       path = lib.mkOption {
         type = lib.types.path;
         default = ./snapshot_config.toml;
         description = "Path to the snapshot_manager TOML config.";
       };
-      PYTHONPATH = lib.mkOption {
-        type = lib.types.str;
-        description = ''
-          the PYTHONPATH to use for the snapshot_manager service.
-        '';
-      };
       EnvironmentFile = lib.mkOption {
         type = lib.types.nullOr (lib.types.coercedTo lib.types.path toString lib.types.str);
         default = null;
@@ -36,40 +30,7 @@ in
   };
 
   config = lib.mkIf cfg.enable {
-    nixpkgs.overlays = [
-      (final: _prev: {
-        snapshot_manager_python = final.python314.withPackages snapshotManagerPackages;
-        snapshot_manager_test_python = final.python314.withPackages (
-          ps:
-          snapshotManagerPackages ps
-          ++ (with ps; [
-            pyfakefs
-            pytest
-            pytest-asyncio
-            pytest-mock
-            pytest-xdist
-          ])
-        );
-        snapshot_manager_tests =
-          final.runCommand "snapshot-manager-tests"
-            {
-              nativeBuildInputs = [ final.snapshot_manager_test_python ];
-            }
-            ''
-              export HOME="$TMPDIR"
-              cd ${inputs.self}
-              pytest \
-                -o cache_dir="$TMPDIR/pytest-cache" \
-                tests/test_common.py \
-                tests/test_signal_alert.py \
-                tests/test_snapshot_manager.py \
-                tests/test_zfs.py
-              touch "$out"
-            '';
-      })
-    ];
-
-    system.checks = [ pkgs.snapshot_manager_tests ];
+    system.checks = [ snapshotManager ];
 
     systemd = {
       services.snapshot_manager = {
@@ -77,12 +38,9 @@ in
         requires = [ "zfs-import.target" ];
         after = [ "zfs-import.target" ];
         path = [ pkgs.zfs ];
-        environment = {
-          PYTHONPATH = cfg.PYTHONPATH;
-        };
         serviceConfig = {
           Type = "oneshot";
-          ExecStart = "${pkgs.snapshot_manager_python}/bin/python -m python.tools.snapshot_manager ${lib.escapeShellArg cfg.path}";
+          ExecStart = "${snapshotManager}/bin/snapshot-manager ${lib.escapeShellArg cfg.path} --signal-alerts ${lib.boolToString cfg.signalAlerts}";
         }
         // lib.optionalAttrs (cfg.EnvironmentFile != null) {
           EnvironmentFile = cfg.EnvironmentFile;