#461: fix JSON merger to create file

configurator/src/main/java/com/devonfw/tools/ide/configurator/merge/JsonMerger.java

@@ -29,7 +29,7 @@
 import com.devonfw.tools.ide.logging.Log;
 
 /**
- * TODO hohwille This type ...
+ * Implementation of {@link FileTypeMerger} for JSON.
  *
  * @since 3.0.0
  */
@@ -125,6 +125,9 @@ private JsonValue mergeAndResolve(JsonValue json, JsonValue mergeJson, VariableR
         return mergeAndResolve(mergeJson, null, resolver, status);
       }
     } else {
+      if (mergeJson == null) {
+        status.updated = true; // JSON to merge does not exist and needs to be created
+      }
       switch (json.getValueType()) {
         case OBJECT:
           return mergeAndResolveObject((JsonObject) json, (JsonObject) mergeJson, resolver, status);

configurator/src/test/java/com/devonfw/tools/ide/configurator/ConfiguratorTest.java

@@ -77,6 +77,10 @@ public void testConfigurator() throws Exception {
         + "        \"foo\": \"" + DEVON_IDE_HOME + "/foo\"\n" //
         + "    }\n" //
         + "}");
+    assertThat(new File(jsonFolder, "update.json")).hasContent("\n" // this newline is rather a bug of JSON-P impl
+        + "{\n" //
+        + "    \"key\": \"value\"\n" //
+        + "}");
 
     File configFolder = new File(workspaceDir, "config");
     assertThat(configFolder).isDirectory();

configurator/src/test/resources/templates/update/json/update.json

@@ -0,0 +1,3 @@
+{
+  "key": "value"
+}