fix: replace deprecated GUtil API

src/main/groovy/com/github/spotbugs/snom/internal/SpotBugsTaskFactory.java

@@ -28,7 +28,6 @@
 import org.gradle.api.plugins.JavaPluginExtension;
 import org.gradle.api.tasks.SourceSetContainer;
 import org.gradle.api.tasks.compile.JavaCompile;
-import org.gradle.util.GUtil;
 import org.gradle.util.GradleVersion;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -80,6 +79,15 @@ private void generateForJava(Project project) {
             });
   }
 
+  static String toLowerCamelCase(String head, String tail) {
+    if (tail == null || tail.isEmpty()) {
+      return head;
+    }
+    StringBuilder builder = new StringBuilder(head.length() + tail.length());
+    builder.append(head).append(Character.toUpperCase(tail.charAt(0))).append(tail.substring(1));
+    return builder.toString();
+  }
+
   private void generateForAndroid(Project project) {
 
     @SuppressWarnings("rawtypes")
@@ -98,8 +106,7 @@ private void generateForAndroid(Project project) {
               }
               variants.all(
                   (BaseVariant variant) -> {
-                    String spotbugsTaskName =
-                        GUtil.toLowerCamelCase("spotbugs " + variant.getName());
+                    String spotbugsTaskName = toLowerCamelCase("spotbugs", variant.getName());
                     log.debug("Creating SpotBugsTask for {}", variant.getName());
                     project
                         .getTasks()

src/test/java/com/github/spotbugs/snom/internal/SpotBugsTaskFactoryTest.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2021 SpotBugs team
+ *
+ * <p>Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of the License at
+ *
+ * <p>http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * <p>Unless required by applicable law or agreed to in writing, software distributed under the
+ * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.github.spotbugs.snom.internal;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+class SpotBugsTaskFactoryTest {
+  @Test
+  void toLowerCamelCase() {
+    assertEquals("spotbugs", SpotBugsTaskFactory.toLowerCamelCase("spotbugs", null));
+    assertEquals("spotbugs", SpotBugsTaskFactory.toLowerCamelCase("spotbugs", ""));
+    assertEquals("spotbugsMain", SpotBugsTaskFactory.toLowerCamelCase("spotbugs", "main"));
+    assertEquals("spotbugsMainCode", SpotBugsTaskFactory.toLowerCamelCase("spotbugs", "mainCode"));
+  }
+}