closes #204: adds maven wrapper and uses it in CI solutions

.github/workflows/build.yaml

@@ -36,4 +36,4 @@ jobs:
           key: ${{ runner.os }}-mvn-cache-${{ hashFiles('**/pom.xml') }}
           restore-keys: ${{ runner.os }}-mvn-cache-
       - name: Build
-        run: mvn -B -V -Prun-its clean verify
+        run: ./mvnw -B -V -Prun-its clean verify

.mvn/wrapper/MavenWrapperDownloader.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright 2007-present the original author or authors.
+ *
+ * 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
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+import java.net.*;
+import java.io.*;
+import java.nio.channels.*;
+import java.util.Properties;
+
+public class MavenWrapperDownloader {
+
+    private static final String WRAPPER_VERSION = "0.5.6";
+    /**
+     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
+     */
+    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+        + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
+
+    /**
+     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
+     * use instead of the default one.
+     */
+    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
+            ".mvn/wrapper/maven-wrapper.properties";
+
+    /**
+     * Path where the maven-wrapper.jar will be saved to.
+     */
+    private static final String MAVEN_WRAPPER_JAR_PATH =
+            ".mvn/wrapper/maven-wrapper.jar";
+
+    /**
+     * Name of the property which should be used to override the default download url for the wrapper.
+     */
+    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
+
+    public static void main(String args[]) {
+        System.out.println("- Downloader started");
+        File baseDirectory = new File(args[0]);
+        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
+
+        // If the maven-wrapper.properties exists, read it and check if it contains a custom
+        // wrapperUrl parameter.
+        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
+        String url = DEFAULT_DOWNLOAD_URL;
+        if(mavenWrapperPropertyFile.exists()) {
+            FileInputStream mavenWrapperPropertyFileInputStream = null;
+            try {
+                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
+                Properties mavenWrapperProperties = new Properties();
+                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
+                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
+            } catch (IOException e) {
+                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
+            } finally {
+                try {
+                    if(mavenWrapperPropertyFileInputStream != null) {
+                        mavenWrapperPropertyFileInputStream.close();
+                    }
+                } catch (IOException e) {
+                    // Ignore ...
+                }
+            }
+        }
+        System.out.println("- Downloading from: " + url);
+
+        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
+        if(!outputFile.getParentFile().exists()) {
+            if(!outputFile.getParentFile().mkdirs()) {
+                System.out.println(
+                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
+            }
+        }
+        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
+        try {
+            downloadFileFromURL(url, outputFile);
+            System.out.println("Done");
+            System.exit(0);
+        } catch (Throwable e) {
+            System.out.println("- Error downloading");
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            String username = System.getenv("MVNW_USERNAME");
+            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
+                @Override
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
+                }
+            });
+        }
+        URL website = new URL(urlString);
+        ReadableByteChannel rbc;
+        rbc = Channels.newChannel(website.openStream());
+        FileOutputStream fos = new FileOutputStream(destination);
+        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+        fos.close();
+        rbc.close();
+    }
+
+}

.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

.travis.yml

@@ -7,11 +7,11 @@ jdk:
 # skip installation step entirely
 install: true
 script:
-  - mvn -B -V -Prun-its clean verify jacoco:report
+  - ./mvnw -B -V -Prun-its clean verify jacoco:report
 after_success:
   # 'coveralls:report' goal is responsible for updating coverall.io stats once travisCI build completes
   # Look for the article 'Coveralls.io configuration for maven projects' in the wiki (https://github.com/asciidoctor/asciidoctor/wiki) for more details
-  - mvn coveralls:report
+  - ./mvnw coveralls:report
 cache:
   directories:
     - $HOME/.m2

CHANGELOG.adoc

@@ -45,4 +45,5 @@ Build / Infrastructure::
   * Simplify TravisCI and AppVeyor to run Java 8 and 11 only (#460)
   * Upgrade Maven from v3.5.0 to 3.6.3 in AppVeyor (#460)
   * Updated jacoco-maven-plugin version from v0.8.2 to 0.8.5 (#479)
-  * Use maven-javadoc-plugin version defined in `pluginManagement` + update to v3.2.0 (#481)
+  * Use maven-javadoc-plugin version defined in `pluginManagement` + update to v3.2.0 (#481)
+  * Add Maven Wrapper to project and CI builds (#484)

README.adoc

@@ -759,16 +759,16 @@ Unit tests are written with http://spockframework.org/[Spock].
 This will be downloaded by Maven and can be run from IntelliJ without any additional setup.
 Tests are run simply by:
 
- mvn clean test
+ ./mvnw clean test
 
 Or any of the other goals which run tests.
 
 Integration tests under `src/it` are run using link:https://maven.apache.org/plugins/maven-invoker-plugin/[maven-invoker-plugin] and the `runt-its` profile.
 To only run them without excluding unit tests, use:
 
- mvn clean verify -DskipTests -Prun-its
+ ./mvnw clean verify -DskipTests -Prun-its
 
-To run all tests at once just use `mvn clean verify -DskipTests -Prun-its`.
+To run all tests at once just use `./mvnw clean verify -DskipTests -Prun-its`.
 
 == Tips & Tricks
 

appveyor.yml

@@ -7,22 +7,13 @@ environment:
     - JAVA_HOME: C:\Program Files\Java\jdk1.8.0
     - JAVA_HOME: C:\Program Files\Java\jdk11
 install:
-  - ps: |
-      Add-Type -AssemblyName System.IO.Compression.FileSystem
-      if (!(Test-Path -Path "C:\maven" )) {
-        Write-Host "Downloading Maven $env:MAVEN_VERSION"
-        (new-object System.Net.WebClient).DownloadFile("https://repo1.maven.org/maven2/org/apache/maven/apache-maven/$env:MAVEN_VERSION/apache-maven-$env:MAVEN_VERSION-bin.zip", 'C:\maven-bin.zip')
-        [System.IO.Compression.ZipFile]::ExtractToDirectory("C:\maven-bin.zip", "C:\maven")
-      }
-  - cmd: SET M2_HOME=C:\maven\apache-maven-%MAVEN_VERSION%
   # Prepend Java entry, remove Ruby entry (C:\Ruby193\bin;) from PATH
-  - cmd: SET PATH=%M2_HOME%\bin;%JAVA_HOME%\bin;%PATH:C:\Ruby193\bin;=%;
+  - cmd: SET PATH=%JAVA_HOME%\bin;%PATH:C:\Ruby193\bin;=%;
   - cmd: SET MAVEN_OPTS=-XX:MaxPermSize=1g -Xmx2g
   - cmd: SET JAVA_OPTS=-XX:MaxPermSize=1g -Xmx2g
   - cmd: mvn --version
   - cmd: java -version
 build_script:
-  - mvn -B -V -Prun-its clean verify
+  - ./mvnw -B -V -Prun-its clean verify
 cache:
-  - C:\maven\ -> appveyor.yml
   - C:\Users\appveyor\.m2\ -> pom.xml