feh: add themes option (#6074)

- added themes option
- added themes test
- updated broken man page links

tests/modules/programs/feh/default.nix

@@ -1,4 +1,5 @@
 {
   feh-empty-config = ./feh-empty-settings.nix;
   feh-bindings = ./feh-bindings.nix;
+  feh-themes = ./feh-themes.nix;
 }

tests/modules/programs/feh/feh-empty-settings.nix

@@ -9,6 +9,7 @@
     nmt.script = ''
       assertPathNotExists home-files/.config/feh/buttons
       assertPathNotExists home-files/.config/feh/keys
+      assertPathNotExists home-files/.config/feh/themes
     '';
   };
 }

tests/modules/programs/feh/feh-themes-expected

@@ -0,0 +1,6 @@
+booth --full-screen --hide-pointer --slideshow-delay 20
+example --info 'foo bar'
+feh --image-bg black
+imagemap -rVq --thumb-width 40 --thumb-height 30 --index-info '%n\n%wx%h'
+present --full-screen --sort name --hide-pointer
+webcam --multiwindow --reload 20

tests/modules/programs/feh/feh-themes.nix

@@ -0,0 +1,32 @@
+{ pkgs, ... }:
+
+{
+  config = {
+    programs.feh.enable = true;
+
+    programs.feh.themes = {
+      feh = [ "--image-bg" "black" ];
+      webcam = [ "--multiwindow" "--reload" "20" ];
+      present = [ "--full-screen" "--sort" "name" "--hide-pointer" ];
+      booth = [ "--full-screen" "--hide-pointer" "--slideshow-delay" "20" ];
+      imagemap = [
+        "-rVq"
+        "--thumb-width"
+        "40"
+        "--thumb-height"
+        "30"
+        "--index-info"
+        "%n\\n%wx%h"
+      ];
+      example = [ "--info" "foo bar" ];
+    };
+
+    test.stubs.feh = { };
+
+    nmt.script = ''
+      assertFileContent \
+        home-files/.config/feh/themes \
+        ${./feh-themes-expected}
+    '';
+  };
+}