yazi: allow literal string for initLua

modules/programs/yazi.nix

@@ -141,7 +141,7 @@ in {
     };
 
     initLua = mkOption {
-      type = with types; nullOr path;
+      type = with types; nullOr (either path lines);
       default = null;
       description = ''
         The init.lua for Yazi itself.
@@ -210,7 +210,12 @@ in {
       "yazi/theme.toml" = mkIf (cfg.theme != { }) {
         source = tomlFormat.generate "yazi-theme" cfg.theme;
       };
-      "yazi/init.lua" = mkIf (cfg.initLua != null) { source = cfg.initLua; };
+      "yazi/init.lua" = mkIf (cfg.initLua != null)
+        (if builtins.isPath cfg.initLua then {
+          source = cfg.initLua;
+        } else {
+          text = cfg.initLua;
+        });
     } // (mapAttrs' (name: value:
       nameValuePair "yazi/flavors/${name}.yazi" { source = value; })
       cfg.flavors) // (mapAttrs' (name: value:

tests/modules/programs/yazi/default.nix

@@ -1,5 +1,6 @@
 {
   yazi-settings = ./settings.nix;
+  yazi-init-lua-string = ./init-lua-string.nix;
   yazi-bash-integration-enabled = ./bash-integration-enabled.nix;
   yazi-zsh-integration-enabled = ./zsh-integration-enabled.nix;
   yazi-fish-integration-enabled = ./fish-integration-enabled.nix;

tests/modules/programs/yazi/init-lua-string.nix

@@ -0,0 +1,14 @@
+{ ... }: {
+  programs.yazi = {
+    enable = true;
+
+    initLua = builtins.readFile ./init.lua;
+  };
+
+  test.stubs.yazi = { };
+
+  nmt.script = ''
+    assertFileContent home-files/.config/yazi/init.lua \
+      ${./init.lua}
+  '';
+}