clight: init (#64309)

clight: init

5 files changed, 174 insertions, 51 deletions

diff --git a/nixos/modules/config/timezone.nix b/nixos/modules/config/locale.nix
index b15948f6e2e5..6f0565881877 100644
--- a/nixos/modules/config/timezone.nix
+++ b/nixos/modules/config/locale.nix
@@ -9,6 +9,8 @@ let
   timezone = types.nullOr (types.addCheck types.str nospace)
     // { description = "null or string without spaces"; };
 
+  lcfg = config.location;
+
 in
 
 {
@@ -37,12 +39,45 @@ in
       };
 
     };
+
+    location = {
+
+      latitude = mkOption {
+        type = types.float;
+        description = ''
+          Your current latitude, between
+          <literal>-90.0</literal> and <literal>90.0</literal>. Must be provided
+          along with longitude.
+        '';
+      };
+
+      longitude = mkOption {
+        type = types.float;
+        description = ''
+          Your current longitude, between
+          between <literal>-180.0</literal> and <literal>180.0</literal>. Must be
+          provided along with latitude.
+        '';
+      };
+
+      provider = mkOption {
+        type = types.enum [ "manual" "geoclue2" ];
+        default = "manual";
+        description = ''
+          The location provider to use for determining your location. If set to
+          <literal>manual</literal> you must also provide latitude/longitude.
+        '';
+      };
+
+    };
   };
 
   config = {
 
     environment.sessionVariables.TZDIR = "/etc/zoneinfo";
 
+    services.geoclue2.enable = mkIf (lcfg.provider == "geoclue2") true;
+
     # This way services are restarted when tzdata changes.
     systemd.globalEnvironment.TZDIR = tzdir;
 
diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index c775345ba4c0..3d4c41bbbdb8 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -20,6 +20,7 @@
   ./config/iproute2.nix
   ./config/krb5/default.nix
   ./config/ldap.nix
+  ./config/locale.nix
   ./config/malloc.nix
   ./config/networking.nix
   ./config/no-x-libs.nix
@@ -33,7 +34,6 @@
   ./config/system-environment.nix
   ./config/system-path.nix
   ./config/terminfo.nix
-  ./config/timezone.nix
   ./config/unix-odbc-drivers.nix
   ./config/users-groups.nix
   ./config/vpnc.nix
@@ -820,6 +820,7 @@
   ./services/web-servers/varnish/default.nix
   ./services/web-servers/zope2.nix
   ./services/x11/extra-layouts.nix
+  ./services/x11/clight.nix
   ./services/x11/colord.nix
   ./services/x11/compton.nix
   ./services/x11/unclutter.nix
diff --git a/nixos/modules/rename.nix b/nixos/modules/rename.nix
index 4ae642222740..6228c95ae91e 100644
--- a/nixos/modules/rename.nix
+++ b/nixos/modules/rename.nix
@@ -257,6 +257,20 @@ with lib;
     (mkRenamedOptionModule [ "networking" "extraResolvconfConf" ] [ "networking" "resolvconf" "extraConfig" ])
     (mkRenamedOptionModule [ "networking" "resolvconfOptions" ] [ "networking" "resolvconf" "extraOptions" ])
 
+    # Redshift
+    (mkChangedOptionModule [ "services" "redshift" "latitude" ] [ "location" "latitude" ]
+      (config:
+        let value = getAttrFromPath [ "services" "redshift" "latitude" ] config;
+        in if value == null then
+          throw "services.redshift.latitude is set to null, you can remove this"
+          else builtins.fromJSON value))
+    (mkChangedOptionModule [ "services" "redshift" "longitude" ] [ "location" "longitude" ]
+      (config:
+        let value = getAttrFromPath [ "services" "redshift" "longitude" ] config;
+        in if value == null then
+          throw "services.redshift.longitude is set to null, you can remove this"
+          else builtins.fromJSON value))
+
   ] ++ (flip map [ "blackboxExporter" "collectdExporter" "fritzboxExporter"
                    "jsonExporter" "minioExporter" "nginxExporter" "nodeExporter"
                    "snmpExporter" "unifiExporter" "varnishExporter" ]
diff --git a/nixos/modules/services/x11/clight.nix b/nixos/modules/services/x11/clight.nix
new file mode 100644
index 000000000000..6ec395bb05ec
--- /dev/null
+++ b/nixos/modules/services/x11/clight.nix
@@ -0,0 +1,115 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let
+  cfg = config.services.clight;
+
+  toConf = v:
+    if builtins.isFloat v then toString v
+    else if isInt v       then toString v
+    else if isBool v      then boolToString v
+    else if isString v    then ''"${escape [''"''] v}"''
+    else if isList v      then "[ " + concatMapStringsSep ", " toConf v + " ]"
+    else abort "clight.toConf: unexpected type (v = ${v})";
+
+  clightConf = pkgs.writeText "clight.conf"
+    (concatStringsSep "\n" (mapAttrsToList
+      (name: value: "${toString name} = ${toConf value};")
+      (filterAttrs
+        (_: value: value != null)
+        cfg.settings)));
+in {
+  options.services.clight = {
+    enable = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        Whether to enable clight or not.
+      '';
+    };
+
+    temperature = {
+      day = mkOption {
+        type = types.int;
+        default = 5500;
+        description = ''
+          Colour temperature to use during the day, between
+          <literal>1000</literal> and <literal>25000</literal> K.
+        '';
+      };
+      night = mkOption {
+        type = types.int;
+        default = 3700;
+        description = ''
+          Colour temperature to use at night, between
+          <literal>1000</literal> and <literal>25000</literal> K.
+        '';
+      };
+    };
+
+    settings = let
+      validConfigTypes = with types; either int (either str (either bool float));
+    in mkOption {
+      type = with types; attrsOf (nullOr (either validConfigTypes (listOf validConfigTypes)));
+      default = {};
+      example = { captures = 20; gamma_long_transition = true; ac_capture_timeouts = [ 120 300 60 ]; };
+      description = ''
+        Additional configuration to extend clight.conf. See
+        <link xlink:href="https://github.com/FedeDP/Clight/blob/master/Extra/clight.conf"/> for a
+        sample configuration file.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    boot.kernelModules = [ "i2c_dev" ];
+    environment.systemPackages = with pkgs; [ clight clightd ];
+    services.dbus.packages = with pkgs; [ clight clightd ];
+    services.upower.enable = true;
+
+    services.clight.settings = {
+      gamma_temp = with cfg.temperature; mkDefault [ day night ];
+    } // (optionalAttrs (config.location.provider == "manual") {
+      latitude = mkDefault config.location.latitude;
+      longitude = mkDefault config.location.longitude;
+    });
+
+    services.geoclue2.appConfig."clightc" = {
+      isAllowed = true;
+      isSystem = true;
+    };
+
+    systemd.services.clightd = {
+      requires = [ "polkit.service" ];
+      wantedBy = [ "multi-user.target" ];
+
+      description = "Bus service to manage various screen related properties (gamma, dpms, backlight)";
+      serviceConfig = {
+        Type = "dbus";
+        BusName = "org.clightd.clightd";
+        Restart = "on-failure";
+        RestartSec = 5;
+        ExecStart = ''
+          ${pkgs.clightd}/bin/clightd
+        '';
+      };
+    };
+
+    systemd.user.services.clight = {
+      after = [ "upower.service" "clightd.service" ];
+      wants = [ "upower.service" "clightd.service" ];
+      partOf = [ "graphical-session.target" ];
+      wantedBy = [ "graphical-session.target" ];
+
+      description = "C daemon to adjust screen brightness to match ambient brightness, as computed capturing frames from webcam";
+      serviceConfig = {
+        Restart = "on-failure";
+        RestartSec = 5;
+        ExecStart = ''
+          ${pkgs.clight}/bin/clight --conf-file ${clightConf}
+        '';
+      };
+    };
+  };
+}
diff --git a/nixos/modules/services/x11/redshift.nix b/nixos/modules/services/x11/redshift.nix
index 4345a3348081..55f8f75021bc 100644
--- a/nixos/modules/services/x11/redshift.nix
+++ b/nixos/modules/services/x11/redshift.nix
@@ -5,6 +5,7 @@ with lib;
 let
 
   cfg = config.services.redshift;
+  lcfg = config.location;
 
 in {
 
@@ -18,35 +19,6 @@ in {
       '';
     };
 
-    latitude = mkOption {
-      type = types.nullOr types.str;
-      default = null;
-      description = ''
-        Your current latitude, between
-        <literal>-90.0</literal> and <literal>90.0</literal>. Must be provided
-        along with longitude.
-      '';
-    };
-
-    longitude = mkOption {
-      type = types.nullOr types.str;
-      default = null;
-      description = ''
-        Your current longitude, between
-        between <literal>-180.0</literal> and <literal>180.0</literal>. Must be
-        provided along with latitude.
-      '';
-    };
-
-    provider = mkOption {
-      type = types.enum [ "manual" "geoclue2" ];
-      default = "manual";
-      description = ''
-        The location provider to use for determining your location. If set to
-        <literal>manual</literal> you must also provide latitude/longitude.
-      '';
-    };
-
     temperature = {
       day = mkOption {
         type = types.int;
@@ -106,33 +78,19 @@ in {
   };
 
   config = mkIf cfg.enable {
-    assertions = [ 
-      {
-        assertion = 
-          if cfg.provider == "manual"
-          then (cfg.latitude != null && cfg.longitude != null) 
-          else (cfg.latitude == null && cfg.longitude == null);
-        message = "Latitude and longitude must be provided together, and with provider set to null.";
-      }
-    ];
-
     # needed so that .desktop files are installed, which geoclue cares about
     environment.systemPackages = [ cfg.package ];
 
-    services.geoclue2 = mkIf (cfg.provider == "geoclue2") {
-      enable = true;
-      appConfig."redshift" = {
-        isAllowed = true;
-        isSystem = true;
-      };
+    services.geoclue2.appConfig."redshift" = {
+      isAllowed = true;
+      isSystem = true;
     };
 
-    systemd.user.services.redshift = 
+    systemd.user.services.redshift =
     let
-      providerString = 
-        if cfg.provider == "manual"
-        then "${cfg.latitude}:${cfg.longitude}"
-        else cfg.provider;
+      providerString = if lcfg.provider == "manual"
+        then "${toString lcfg.latitude}:${toString lcfg.longitude}"
+        else lcfg.provider;
     in
     {
       description = "Redshift colour temperature adjuster";