feat(tmpfiles): defer per-service file permissions to reduce boot time

2026-02-12 18:48:29 -05:00
parent 84cbe82cb0
commit 82add97a80
19 changed files with 139 additions and 53 deletions
--- a/modules/lib.nix
+++ b/modules/lib.nix
@@ -155,5 +155,28 @@ inputs.nixpkgs.lib.extend (
        #  }
        #];
      };
+
+    serviceFilePerms =
+      serviceName: tmpfilesRules:
+      { pkgs, ... }:
+      let
+        confFile = pkgs.writeText "${serviceName}-file-perms.conf" (lib.concatStringsSep "\n" tmpfilesRules);
+      in
+      {
+        systemd.services."${serviceName}-file-perms" = {
+          after = [ "${serviceName}-mounts.service" ];
+          before = [ "${serviceName}.service" ];
+          serviceConfig = {
+            Type = "oneshot";
+            RemainAfterExit = true;
+            ExecStart = "${pkgs.systemd}/bin/systemd-tmpfiles --create ${confFile}";
+          };
+        };
+
+        systemd.services.${serviceName} = {
+          wants = [ "${serviceName}-file-perms.service" ];
+          after = [ "${serviceName}-file-perms.service" ];
+        };
+      };
  }
 )