···

       
49
       
 
       
          '';

     

       
50
       
 
       
        };

     

       
51
       
 
       


     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
52
       
 
       
      };

     

       
53
       
 
       


     

       
54
       
 
       
    };

     
···

       
63
       
 
       
        let

     

       
64
       
 
       
          light = "${pkgs.light}/bin/light";

     

       
65
       
 
       
          step = builtins.toString cfg.brightnessKeys.step;

     

       
0
       
 
       

     

       
66
       
 
       
        in

     

       
67
       
 
       
        [

     

       
68
       
 
       
          {

     

       
69
       
 
       
            keys = [ 224 ];

     

       
70
       
 
       
            events = [ "key" ];

     

       
71
       
-
       
            # Use minimum brightness 0.1 so the display won't go totally black.

     

       
72
       
-
       
            command = "${light} -N 0.1 && ${light} -U ${step}";

     

       
73
       
 
       
          }

     

       
74
       
 
       
          {

     

       
75
       
 
       
            keys = [ 225 ];

     

···

       
49
       
 
       
          '';

     

       
50
       
 
       
        };

     

       
51
       
 
       


     

       
52
       
+
       
        minBrightness = lib.mkOption {

     

       
53
       
+
       
          type = lib.types.numbers.between 0 100;

     

       
54
       
+
       
          default = 0.1;

     

       
55
       
+
       
          description = ''

     

       
56
       
+
       
            The minimum authorized brightness value, e.g. to avoid the

     

       
57
       
+
       
            display going dark.

     

       
58
       
+
       
          '';

     

       
59
       
+
       
        };

     

       
60
       
+
       


     

       
61
       
 
       
      };

     

       
62
       
 
       


     

       
63
       
 
       
    };

     
···

       
72
       
 
       
        let

     

       
73
       
 
       
          light = "${pkgs.light}/bin/light";

     

       
74
       
 
       
          step = builtins.toString cfg.brightnessKeys.step;

     

       
75
       
+
       
          minBrightness = builtins.toString cfg.brightnessKeys.minBrightness;

     

       
76
       
 
       
        in

     

       
77
       
 
       
        [

     

       
78
       
 
       
          {

     

       
79
       
 
       
            keys = [ 224 ];

     

       
80
       
 
       
            events = [ "key" ];

     

       
81
       
+
       
            # -N is used to ensure that value >= minBrightness

     

       
82
       
+
       
            command = "${light} -N ${minBrightness} && ${light} -U ${step}";

     

       
83
       
 
       
          }

     

       
84
       
 
       
          {

     

       
85
       
 
       
            keys = [ 225 ];