Don't show the difficult terrain measurement hint when no terrain module is enabled

CHANGELOG.md

@@ -1,3 +1,8 @@
+## In development
+### Bugfixes
+- The hint that tells users how to enable difficult terrain measurement in Drag Ruler is no longer shown if no terrain layer module is installed.
+
+
 ## 1.5.0
 ### New features
 - In combat Drag Ruler will now remember the path that was taken by a token during the turn. Picking the token up during the same turn will continue the previous measurement, taking steps that are already taken into account.

src/compatibility.js

@@ -61,6 +61,7 @@ export function checkDependencies() {
 			else if (game.modules.get("TerrainLayer")?.active) {
 				enabledTerrainModule = game.modules.get("TerrainLayer").data.title;
 			}
+			if (enabledTerrainModule) {
 				new Dialog({
 					title: game.i18n.localize("drag-ruler.dependencies.terrain-ruler.title"),
 					content: `<h2>${game.i18n.localize("drag-ruler.dependencies.terrain-ruler.title")}</h2><p>${game.i18n.format("drag-ruler.dependencies.terrain-ruler.text", {moduleName: enabledTerrainModule})}</p>`,
@@ -80,5 +81,6 @@ export function checkDependencies() {
 				}).render(true);
 			}
 		}
+	}
 }