Fix to allow nothing in the default scope, only custom scopes being used

Author: rbygrave

inject-generator/src/main/java/io/avaje/inject/generator/ScopeInfo.java

@@ -30,6 +30,7 @@ class ScopeInfo {
   private String moduleFullName;
   private String moduleShortName;
   private JavaFileObject moduleFile;
+  private boolean emptyModule;
 
   /**
    * Create for the main/global module scope.
@@ -74,11 +75,14 @@ private String initName(String topPackage) {
   }
 
   void initialiseName(String topPackage) throws IOException {
-    modulePackage = topPackage;
-    final String name = initName(modulePackage);
-    moduleShortName = name + "Module";
-    moduleFullName = modulePackage + "." + moduleShortName;
-    moduleFile = context.createWriter(moduleFullName);
+    emptyModule = topPackage == null;
+    if (!emptyModule) {
+      modulePackage = topPackage;
+      final String name = initName(modulePackage);
+      moduleShortName = name + "Module";
+      moduleFullName = modulePackage + "." + moduleShortName;
+      moduleFile = context.createWriter(moduleFullName);
+    }
   }
 
   JavaFileObject moduleFile() {
@@ -155,7 +159,15 @@ void writeModule() {
       context.logError("already written module " + name);
       return;
     }
-    MetaDataOrdering ordering = new MetaDataOrdering(metaData.values(), context, this);
+    final Collection<MetaData> meta = metaData.values();
+    if (emptyModule) {
+      // typically nothing in the default scope, only custom scopes
+      if (meta.size() > 0) {
+        context.logWarn("Empty module but meta is not empty? " + meta);
+      }
+      return;
+    }
+    MetaDataOrdering ordering = new MetaDataOrdering(meta, context, this);
     int remaining = ordering.processQueue();
     if (remaining > 0) {
       ordering.logWarnings();

inject-generator/src/main/java/io/avaje/inject/generator/SimpleModuleWriter.java

@@ -80,7 +80,6 @@ private void writeServicesFile() {
         writer.write(fullName);
         writer.close();
       }
-
     } catch (IOException e) {
       e.printStackTrace();
       context.logError("Failed to write services file " + e.getMessage());