enable paperless-ngx document management

modules/common/default.nix

@@ -75,6 +75,10 @@
         type = lib.types.str;
         description = "Hostname for metrics server.";
       };
+      paperless = lib.mkOption {
+        type = lib.types.str;
+        description = "Hostname for document server (paperless-ngx).";
+      };
       prometheus = lib.mkOption {
         type = lib.types.str;
         description = "Hostname for Prometheus server.";

modules/nixos/services/default.nix

@@ -19,6 +19,7 @@
     ./n8n.nix
     ./netdata.nix
     ./nextcloud.nix
+    ./paperless.nix
     ./prometheus.nix
     ./samba.nix
     ./secrets.nix

modules/nixos/services/paperless.nix

@@ -0,0 +1,48 @@
+{ config, lib, ... }: {
+
+  config = lib.mkIf config.services.paperless.enable {
+
+    services.paperless = {
+      mediaDir = "/data/generic/paperless";
+      passwordFile = config.secrets.paperless.dest;
+      extraConfig = {
+        PAPERLESS_OCR_USER_ARGS =
+          builtins.toJSON { invalidate_digital_signatures = true; };
+
+        # Enable if changing the path name in Caddy
+        # PAPERLESS_FORCE_SCRIPT_NAME = "/paperless";
+        # PAPERLESS_STATIC_URL = "/paperless/static/";
+      };
+    };
+
+    users.users.paperless.extraGroups = [ "generic" ];
+
+    caddy.routes = [{
+      match = [{
+        host = [ config.hostnames.paperless ];
+        # path = [ "/paperless*" ]; # Change path name in Caddy
+      }];
+      handle = [{
+        handler = "reverse_proxy";
+        upstreams = [{
+          dial =
+            "localhost:${builtins.toString config.services.paperless.port}";
+        }];
+      }];
+    }];
+
+    secrets.paperless = {
+      source = ../../../private/prometheus.age;
+      dest = "${config.secretsDirectory}/paperless";
+      owner = "paperless";
+      group = "paperless";
+      permissions = "0440";
+    };
+    systemd.services.paperless-secret = {
+      requiredBy = [ "paperless.service" ];
+      before = [ "paperless.service" ];
+    };
+
+  };
+
+}