Add light theme support

.direnv/flake-profile

@@ -1 +1 @@
-flake-profile-1-link
+flake-profile-2-link

.direnv/flake-profile-2-link

@@ -0,0 +1 @@
+/nix/store/di1jdvlfxza2mnh3f0gdl8h9a5gd41yh-nix-shell-env

README.md

@@ -31,6 +31,7 @@ Options:
       --rotate-hue <ROTATE_HUE>  Rotate colors along the hue axis [default: 0]
       --lighten <LIGHTEN>        Lighten/darken colors [default: 0]
       --saturate <SATURATE>      Saturate/desaturate colors [default: 0]
+  -l, --light                    Generate a light colorscheme
   -h, --help                     Print help
   -V, --version                  Print version
 ```

flake.nix

@@ -73,8 +73,8 @@
                 builtins.listToAttrs (lib.lists.imap0 (i: v: {
                   name = builtins.toString i;
                   value = v;
-                }) (lib.strings.splitString "\n"
-                  (builtins.readFile (generate name image args))));
+                }) (lib.strings.splitString "\n" (lib.strings.removeSuffix "\n"
+                  (builtins.readFile (generate name image args)))));
             in {
               environment.graphical.colors = lib.attrsets.mapAttrs
                 (name: value: formattedColors name value.image value.params)

src/main.rs

@@ -27,6 +27,9 @@ struct Args {
     /// Saturate/desaturate colors
     #[arg(long, default_value_t = 0.0, value_parser = validate_color_delta, allow_hyphen_values = true)]
     saturate: f64,
+    /// Generate a light colorscheme
+    #[arg(short, long)]
+    light: bool,
 }
 
 fn main() -> Result<()> {
@@ -58,13 +61,18 @@ fn main() -> Result<()> {
     }
 
     // Apply color transformations, if any
-    let colors: Vec<_> = colors
+    let mut colors: Vec<_> = colors
         .into_iter()
         .map(|c| c.rotate_hue(args.rotate_hue))
         .map(|c| c.lighten(args.lighten))
         .map(|c| c.saturate(args.saturate))
         .collect();
 
+    // Light theme transformations
+    if args.light {
+        colors.reverse();
+    }
+
     let brush = Brush::from_mode(Some(ansi::Mode::TrueColor));
 
     // Print colors with formatting turned off for pipes