nixos/grafana: set plugins path, fix image generation

Also add options to configure which organization should have anonymous access.

nixos/modules/services/monitoring/grafana.nix

···
 
   envOptions = {
     PATHS_DATA = cfg.dataDir;
+    PATHS_PLUGINS = "${cfg.dataDir}/plugins";
     PATHS_LOGS = "${cfg.dataDir}/log";
 
     SERVER_PROTOCOL = cfg.protocol;
···
     USERS_AUTO_ASSIGN_ORG_ROLE = cfg.users.autoAssignOrgRole;
 
     AUTH_ANONYMOUS_ENABLED = b2s cfg.auth.anonymous.enable;
+    AUTH_ANONYMOUS_ORG_NAME = cfg.auth.anonymous.org_name;
+    AUTH_ANONYMOUS_ORG_ROLE = cfg.auth.anonymous.org_role;
 
     ANALYTICS_REPORTING_ENABLED = b2s cfg.analytics.reporting.enable;
   } // cfg.extraOptions;
···
         default = false;
         type = types.bool;
       };
+      org_name = mkOption {
+        description = "Which organization to allow anonymous access to";
+        default = "Main Org.";
+        type = types.str;
+      };
+      org_role = mkOption {
+        description = "Which role anonymous users have in the organization";
+        default = "Viewer";
+        type = types.str;
+      };
+
     };
 
     analytics.reporting = {
···
       "Grafana passwords will be stored as plaintext in the Nix store!"
     ];
 
+    environment.systemPackages = [ cfg.package ];
+
     systemd.services.grafana = {
       description = "Grafana Service Daemon";
       wantedBy = ["multi-user.target"];
···
       };
       preStart = ''
         ln -fs ${cfg.package}/share/grafana/conf ${cfg.dataDir}
+        ln -fs ${cfg.package}/share/grafana/vendor ${cfg.dataDir}
       '';
     };
 

pkgs/servers/monitoring/grafana/default.nix

···
-{ lib, buildGoPackage, fetchurl, fetchFromGitHub }:
+{ lib, buildGoPackage, fetchurl, fetchFromGitHub, phantomjs2 }:
 
 buildGoPackage rec {
   version = "3.1.0";
···
   postInstall = ''
     tar -xvf $srcStatic
     mkdir -p $bin/share/grafana
-    mv grafana-*/{public,conf} $bin/share/grafana/
+    mv grafana-*/{public,conf,vendor} $bin/share/grafana/
+    ln -sf ${phantomjs2}/bin/phantomjs $bin/share/grafana/vendor/phantomjs/phantomjs
   '';
 
   meta = with lib; {