Merge pull request #9542 from srzamfir/feature/BAEL-4090_Finding_Unused_Gradle_Dependencies

Feature/bael 4090 finding unused gradle dependencies

gradle-5/.gitignore

@@ -0,0 +1,2 @@
+**/build/**
+/build/

gradle-5/build.gradle

@@ -1,54 +1,21 @@
-plugins {
-    id "application"
-}
-apply plugin :"java"
-
-description = "Java MainClass execution examples"
-group = "com.baeldung"
-version = "0.0.1"
-sourceCompatibility = "1.8"
-targetCompatibility = "1.8"
-
-ext {
-   javaMainClass = "com.baeldung.gradle.exec.MainClass"
+plugins{
+    id "nebula.lint" version "16.9.0"
 }
 
-jar {
-    manifest {
-        attributes(
-            "Main-Class": javaMainClass
-        )
+description = "Gradle 5 root project"
+allprojects {
+    apply plugin :"java"
+    apply plugin :"nebula.lint"
+    gradleLint {
+        rules=['unused-dependency']
+        reportFormat = 'text'
     }
-}
+    group = "com.baeldung"
+    version = "0.0.1"
+    sourceCompatibility = "1.8"
+    targetCompatibility = "1.8"
 
-application {
-    mainClassName = javaMainClass
-}
-
-task runWithJavaExec(type: JavaExec) {
-    group = "Execution"
-    description = "Run the main class with JavaExecTask"
-    classpath = sourceSets.main.runtimeClasspath
-    main = javaMainClass
-}
-
-task runWithExec(type: Exec) {
-    dependsOn build
-    group = "Execution"
-    description = "Run the main class with ExecTask"
-    commandLine "java", "-classpath", sourceSets.main.runtimeClasspath.getAsPath(), javaMainClass
-}
-
-task runWithExecJarExecutable(type: Exec) {
-    dependsOn jar
-    group = "Execution"
-    description = "Run the output executable jar with ExecTask"
-    commandLine "java", "-jar", jar.archiveFile.get()
-}
-
-task runWithExecJarOnClassPath(type: Exec) {
-    dependsOn jar
-    group = "Execution"
-    description = "Run the mainClass from the output jar in classpath with ExecTask"
-    commandLine "java", "-classpath", jar.archiveFile.get() , javaMainClass
+    repositories {
+        jcenter()
+    }
 }

gradle-5/gradle/wrapper/gradle-wrapper.properties

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.5.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-bin.zip

gradle-5/java-exec/.gitignore

@@ -0,0 +1 @@
+/build/

gradle-5/java-exec/build.gradle

@@ -0,0 +1,47 @@
+apply plugin: "application"
+
+description = "Java MainClass execution examples"
+
+ext {
+   javaMainClass = "com.baeldung.gradle.exec.MainClass"
+}
+
+jar {
+    manifest {
+        attributes(
+            "Main-Class": javaMainClass
+        )
+    }
+}
+
+application {
+    mainClassName = javaMainClass
+}
+
+task runWithJavaExec(type: JavaExec) {
+    group = "Execution"
+    description = "Run the main class with JavaExecTask"
+    classpath = sourceSets.main.runtimeClasspath
+    main = javaMainClass
+}
+
+task runWithExec(type: Exec) {
+    dependsOn build
+    group = "Execution"
+    description = "Run the main class with ExecTask"
+    commandLine "java", "-classpath", sourceSets.main.runtimeClasspath.getAsPath(), javaMainClass
+}
+
+task runWithExecJarExecutable(type: Exec) {
+    dependsOn jar
+    group = "Execution"
+    description = "Run the output executable jar with ExecTask"
+    commandLine "java", "-jar", jar.archiveFile.get()
+}
+
+task runWithExecJarOnClassPath(type: Exec) {
+    dependsOn jar
+    group = "Execution"
+    description = "Run the mainClass from the output jar in classpath with ExecTask"
+    commandLine "java", "-classpath", jar.archiveFile.get() , javaMainClass
+}

gradle-5/settings.gradle

@@ -0,0 +1,3 @@
+rootProject.name='gradle-5-articles'
+include 'java-exec'
+include 'unused-dependencies'

gradle-5/unused-dependencies/.gitignore

@@ -0,0 +1 @@
+/build/

gradle-5/unused-dependencies/build.gradle

@@ -0,0 +1,8 @@
+
+description = "Gradle Unused Dependencies example"
+
+dependencies {
+    implementation('com.google.guava:guava:29.0-jre')
+    implementation('org.apache.httpcomponents:httpclient:4.5.12')
+    testImplementation('junit:junit:4.12')
+}

gradle-5/unused-dependencies/src/main/java/com/baeldung/unused/UnusedDependencies.java

@@ -0,0 +1,39 @@
+package com.baeldung.unused;
+
+import java.lang.reflect.Method;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import org.apache.http.ssl.SSLContextBuilder;
+
+import com.google.common.collect.ImmutableList;
+
+public class UnusedDependencies {
+
+    public static void main(String[] args) {
+        System.out.println("Hello world");
+        useGuava();
+        useHttpCore();
+        useHttpClientWithReflection();
+    }
+
+    private static void useGuava() {
+        List<String> list = ImmutableList.of("Baledung", "is", "cool");
+        System.out.println(list.stream()
+            .collect(Collectors.joining(" ")));
+    }
+
+    private static void useHttpCore() {
+        SSLContextBuilder.create();
+    }
+
+    private static void useHttpClientWithReflection() {
+        try {
+            Class<?> httpBuilder = Class.forName("org.apache.http.impl.client.HttpClientBuilder");
+            Method create = httpBuilder.getMethod("create", null);
+            create.invoke(httpBuilder, null);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}