nixos/paperless: replace systemd script with ExecStart

nixos/modules/services/misc/paperless.nix

@@ -664,6 +664,9 @@ in
           serviceConfig = {
             User = cfg.user;
             WorkingDirectory = cfg.dataDir;
+            ExecStart = "${manage}/bin/paperless-manage document_exporter ${cfg.exporter.directory} ${
+              lib.cli.toCommandLineShellGNU { } cfg.exporter.settings
+            }";
           };
           unitConfig =
             let
@@ -682,13 +685,7 @@ in
               OnFailure = services;
               OnSuccess = services;
             };
-          enableStrictShellChecks = true;
           path = [ manage ];
-          script = ''
-            paperless-manage document_exporter ${cfg.exporter.directory} ${
-              lib.cli.toCommandLineShellGNU { } cfg.exporter.settings
-            }
-          '';
         };
       })
     ]

nixos/tests/paperless.nix

@@ -116,9 +116,9 @@
           assert "1 timers listed." in timers, "incorrect number of timers"
 
           # Double check that our attrset option override works as expected
-          cmdline = node.succeed("grep 'paperless-manage' $(systemctl cat paperless-exporter | grep ExecStart | cut -f 2 -d=)")
+          cmdline = node.succeed("systemctl cat paperless-exporter | grep ExecStart | grep 'paperless-manage' | cut -f 2 -d=")
           print(f"Exporter command line {cmdline!r}")
-          assert cmdline.strip() == "paperless-manage document_exporter /var/lib/paperless/export --compare-checksums --delete --no-progress-bar --no-thumbnail", "Unexpected exporter command line"
+          assert cmdline.strip().endswith("paperless-manage document_exporter /var/lib/paperless/export --compare-checksums --delete --no-progress-bar --no-thumbnail"), "Unexpected exporter command line"
 
     test_paperless(simple)
     simple.send_monitor_command("quit")