nixos manuals: bring back package references

This reverts most of 89e983786a, as those references are sanitized now.
Fixes #10039, at least most of it.

The `sane` case wasn't fixed, as it calls a *function* in pkgs to get
the default value.

nixos/modules/programs/ssh.nix

@@ -36,6 +36,7 @@ in
 
       askPassword = mkOption {
         type = types.str;
+        default = "${pkgs.x11_ssh_askpass}/libexec/x11-ssh-askpass";
         description = ''Program used by SSH to ask for passwords.'';
       };
 
@@ -226,7 +227,5 @@ in
 
     environment.variables.SSH_ASKPASS = optionalString config.services.xserver.enable askPassword;
 
-    programs.ssh.askPassword = mkDefault "${pkgs.x11_ssh_askpass}/libexec/x11-ssh-askpass";
-
   };
 }

nixos/modules/programs/venus.nix

@@ -99,6 +99,7 @@ in
       };
 
       outputTheme = mkOption {
+        default = "${pkgs.venus}/themes/classic_fancy";
         type = types.path;
         description = ''
           Directory containing a config.ini file which is merged with this one.
@@ -169,7 +170,5 @@ in
         startAt = cfg.dates;
       };
 
-    services.venus.outputTheme = mkDefault "${pkgs.venus}/themes/classic_fancy";
-
   };
 }

nixos/modules/services/amqp/activemq/default.nix

@@ -32,6 +32,7 @@ in {
         '';
       };
       configurationDir = mkOption {
+        default = "${activemq}/conf";
         description = ''
           The base directory for ActiveMQ's configuration.
           By default, this directory is searched for a file named activemq.xml,
@@ -125,8 +126,6 @@ in {
       '';
     };
 
-    services.activemq.configurationDir = mkDefault "${activemq}/conf";
-
   };
 
 }

nixos/modules/services/misc/nixos-manual.nix

@@ -96,6 +96,7 @@ in
 
     services.nixosManual.browser = mkOption {
       type = types.path;
+      default = "${pkgs.w3m-nox}/bin/w3m";
       description = ''
         Browser used to show the manual.
       '';
@@ -133,8 +134,6 @@ in
     services.mingetty.helpLine = mkIf cfg.showManual
       "\nPress <Alt-F${toString cfg.ttyNumber}> for the NixOS manual.";
 
-    services.nixosManual.browser = mkDefault "${pkgs.w3m-nox}/bin/w3m";
-
   };
 
 }

nixos/modules/services/misc/subsonic.nix

@@ -97,6 +97,7 @@ in
 
       transcoders = mkOption {
         type = types.listOf types.path;
+        default = [ "${pkgs.ffmpeg}/bin/ffmpeg" ];
         description = ''
           List of paths to transcoder executables that should be accessible
           from Subsonic. Symlinks will be created to each executable inside
@@ -152,8 +153,5 @@ in
     };
 
     users.extraGroups.subsonic.gid = config.ids.gids.subsonic;
-
-    services.subsonic.transcoders = mkDefault [ "${pkgs.ffmpeg}/bin/ffmpeg" ];
-
   };
 }

nixos/modules/services/monitoring/grafana.nix

@@ -87,6 +87,7 @@ in {
 
     staticRootPath = mkOption {
       description = "Root path for static assets.";
+      default = "${cfg.package.out}/share/grafana/public";
       type = types.str;
     };
 
@@ -232,8 +233,5 @@ in {
       home = cfg.dataDir;
       createHome = true;
     };
-
-    services.grafana.staticRootPath = mkDefault "${cfg.package}/share/grafana/public";
-
   };
 }

nixos/modules/services/networking/dnscrypt-proxy.nix

@@ -52,7 +52,10 @@ in
         default = "opendns";
         type = types.nullOr types.string;
         description = ''
-          The name of the upstream DNSCrypt resolver to use.
+          The name of the upstream DNSCrypt resolver to use. See
+          <literal>${resolverListFile}</literal> for alternative resolvers
+          (e.g., if you are concerned about logging and/or server
+          location).
         '';
       };
       customResolver = mkOption {

nixos/modules/services/web-servers/phpfpm.nix

@@ -46,7 +46,8 @@ in {
 
       phpIni = mkOption {
         type = types.path;
-        description = "PHP configuration file to use.";
+        default = "${cfg.phpPackage}/etc/php-recommended.ini";
+        description = "php.ini file to use.";
       };
 
       poolConfigs = mkOption {
@@ -87,7 +88,5 @@ in {
       };
     };
 
-    services.phpfpm.phpIni = mkDefault "${cfg.phpPackage}/etc/php-recommended.ini";
-
   };
 }

nixos/modules/services/x11/display-managers/lightdm.nix

@@ -87,6 +87,7 @@ in
 
       background = mkOption {
         type = types.str;
+        default = "${pkgs.nixos-artwork}/share/artwork/gnome/Gnome_Dark.png";
         description = ''
           The background image or color to use.
         '';
@@ -152,9 +153,6 @@ in
     };
 
     users.extraGroups.lightdm.gid = config.ids.gids.lightdm;
-
-    services.xserver.displayManager.lightdm.background = mkDefault "${pkgs.nixos-artwork}/share/artwork/gnome/Gnome_Dark.png";
-
     services.xserver.tty     = null; # We might start multiple X servers so let the tty increment themselves..
     services.xserver.display = null; # We specify our own display (and logfile) in xserver-wrapper up there
   };