Add localbackup clan service

clanServices/localbackup/tests/vm/default.nix

@@ -0,0 +1,62 @@
+{ ... }:
+{
+  name = "service-localbackup";
+
+  clan = {
+    directory = ./.;
+    test.useContainers = true;
+    inventory = {
+
+      machines.machine = { };
+
+      instances = {
+        localbackup = {
+          module.name = "@clan/localbackup";
+          module.input = "self";
+          roles.default.machines."machine".settings = {
+
+            targets.hdd = {
+              directory = "/mnt/external-disk";
+              preMountHook = ''
+                touch /run/mount-external-disk
+              '';
+              postUnmountHook = ''
+                touch /run/unmount-external-disk
+              '';
+            };
+          };
+        };
+      };
+    };
+  };
+
+  nodes.machine = {
+    clan.core.state.test-backups.folders = [ "/var/test-backups" ];
+  };
+
+  testScript = ''
+    import json
+    start_all()
+
+    machine.systemctl("start network-online.target")
+    machine.wait_for_unit("network-online.target")
+
+    # dummy data
+    machine.succeed("mkdir -p /var/test-backups")
+    machine.succeed("echo testing > /var/test-backups/somefile")
+
+    # create
+    machine.succeed("localbackup-create >&2")
+    machine.wait_until_succeeds("! systemctl is-active localbackup-job-serverone >&2")
+
+    # list
+    snapshot_list = machine.succeed("localbackup-list").strip()
+    assert json.loads(snapshot_list)[0]["name"].strip() == "hdd::/mnt/external-disk/snapshot.0"
+
+    # borgbackup restore
+    machine.succeed("rm -f /var/test-backups/somefile")
+
+    machine.succeed("NAME=/mnt/external-disk/snapshot.0 FOLDERS=/var/test-backups /run/current-system/sw/bin/localbackup-restore >&2")
+    assert machine.succeed("cat /var/test-backups/somefile").strip() == "testing", "restore failed"
+  '';
+}