nixos/varnish: reduce overusage of lib (NixOS#208242)

Author: ctheune

nixos/modules/services/web-servers/varnish/default.nix

@@ -5,65 +5,62 @@
   ...
 }:
 
-with lib;
-
 let
   cfg = config.services.varnish;
 
   commandLine =
     "-f ${pkgs.writeText "default.vcl" cfg.config}"
     +
-      optionalString (cfg.extraModules != [ ])
+      lib.optionalString (cfg.extraModules != [ ])
         " -p vmod_path='${
-           makeSearchPathOutput "lib" "lib/varnish/vmods" ([ cfg.package ] ++ cfg.extraModules)
+           lib.makeSearchPathOutput "lib" "lib/varnish/vmods" ([ cfg.package ] ++ cfg.extraModules)
          }' -r vmod_path";
 in
 {
   options = {
     services.varnish = {
-      enable = mkEnableOption "Varnish Server";
+      enable = lib.mkEnableOption "Varnish Server";
 
-      enableConfigCheck = mkEnableOption "checking the config during build time" // {
+      enableConfigCheck = lib.mkEnableOption "checking the config during build time" // {
         default = true;
       };
 
-      package = mkPackageOption pkgs "varnish" { };
+      package = lib.mkPackageOption pkgs "varnish" { };
 
-      http_address = mkOption {
-        type = types.str;
+      http_address = lib.mkOption {
+        type = lib.types.str;
         default = "*:6081";
         description = ''
           HTTP listen address and port.
         '';
       };
 
-      config = mkOption {
-        type = types.lines;
+      config = lib.mkOption {
+        type = lib.types.lines;
         description = ''
           Verbatim default.vcl configuration.
         '';
       };
 
-      stateDir = mkOption {
-        type = types.path;
+      stateDir = lib.mkOption {
+        type = lib.types.path;
         default = "/run/varnish/${config.networking.hostName}";
-        defaultText = literalExpression ''"/run/varnish/''${config.networking.hostName}"'';
+        defaultText = lib.literalExpression ''"/run/varnish/''${config.networking.hostName}"'';
         description = ''
           Directory holding all state for Varnish to run. Note that this should be a tmpfs in order to avoid performance issues and crashes.
         '';
       };
-
-      extraModules = mkOption {
-        type = types.listOf types.package;
+      extraModules = lib.mkOption {
+        type = lib.types.listOf lib.types.package;
         default = [ ];
-        example = literalExpression "[ pkgs.varnishPackages.geoip ]";
+        example = lib.literalExpression "[ pkgs.varnishPackages.geoip ]";
         description = ''
           Varnish modules (except 'std').
         '';
       };
 
-      extraCommandLine = mkOption {
-        type = types.str;
+      extraCommandLine = lib.mkOption {
+        type = lib.types.str;
         default = "";
         example = "-s malloc,256M";
         description = ''
@@ -74,17 +71,16 @@ in
 
   };
 
-  config = mkIf cfg.enable {
-
+  config = lib.mkIf cfg.enable {
     systemd.services.varnish = {
       description = "Varnish";
       wantedBy = [ "multi-user.target" ];
       after = [ "network.target" ];
-      preStart = mkIf (!(lib.hasPrefix "/run/" cfg.stateDir)) ''
+      preStart = lib.mkIf (!(lib.hasPrefix "/run/" cfg.stateDir)) ''
         mkdir -p ${cfg.stateDir}
         chown -R varnish:varnish ${cfg.stateDir}
       '';
-      postStop = mkIf (!(lib.hasPrefix "/run/" cfg.stateDir)) ''
+      postStop = lib.mkIf (!(lib.hasPrefix "/run/" cfg.stateDir)) ''
         rm -rf ${cfg.stateDir}
       '';
       serviceConfig = {
@@ -95,7 +91,7 @@ in
         RestartSec = "5s";
         User = "varnish";
         Group = "varnish";
-        RuntimeDirectory = mkIf (lib.hasPrefix "/run/" cfg.stateDir) (
+        RuntimeDirectory = lib.mkIf (lib.hasPrefix "/run/" cfg.stateDir) (
           lib.removePrefix "/run/" cfg.stateDir
         );
         AmbientCapabilities = "cap_net_bind_service";
@@ -107,7 +103,7 @@ in
     environment.systemPackages = [ cfg.package ];
 
     # check .vcl syntax at compile time (e.g. before nixops deployment)
-    system.checks = mkIf cfg.enableConfigCheck [
+    system.checks = lib.mkIf cfg.enableConfigCheck [
       (pkgs.runCommand "check-varnish-syntax" { } ''
         ${cfg.package}/bin/varnishd -C ${commandLine} 2> $out || (cat $out; exit 1)
       '')