lib/dependency-checker.js

@@ -134,13 +134,21 @@ class EmberCLIDependencyChecker {
   }
 
   normalizedBowerDependencies() {
-    const npmDependencies = this.project.dependencies();
-    const bowerDependencies = this.project.bowerDependencies();
-    Object.keys(bowerDependencies).forEach((pkg) => {
-      if(npmDependencies.hasOwnProperty(`@bower_components/${pkg}`)) {
-        delete bowerDependencies[pkg];
-      }
-    });
+    let bowerDependencies = {};
+
+    const bowerPath = path.join(this.project.root, 'bower.json');
+
+    if (fs.existsSync(bowerPath)) {
+      const npmDependencies = this.project.dependencies();
+      bowerDependencies = this.project.bowerDependencies();
+
+      Object.keys(bowerDependencies).forEach((pkg) => {
+        if(npmDependencies.hasOwnProperty(`@bower_components/${pkg}`)) {
+          delete bowerDependencies[pkg];
+        }
+      });
+    }
+
     return bowerDependencies;
   }
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ember-cli-dependency-checker",
-  "version": "3.3.0",
+  "version": "3.3.1",
   "description": "Ember CLI addon for detecting missing npm and bower dependencies before executing ember commands",
   "keywords": [
     "bower",
@@ -54,7 +54,7 @@
     "sinon": "^13.0.0"
   },
   "peerDependencies": {
-    "ember-cli": "~3.2.0"
+    "ember-cli": "^3.2.0 || ^4.0.0"
   },
   "engines": {
     "node": ">= 6"