diff --git a/src/it/projects/MJAVADOC-619_copyright-year/invoker.properties b/src/it/projects/MJAVADOC-619_copyright-year/invoker.properties
new file mode 100644
index 000000000..7a948bb3e
--- /dev/null
+++ b/src/it/projects/MJAVADOC-619_copyright-year/invoker.properties
@@ -0,0 +1,17 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you 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.
+invoker.goals = compile javadoc:javadoc
diff --git a/src/it/projects/MJAVADOC-619_copyright-year/pom.xml b/src/it/projects/MJAVADOC-619_copyright-year/pom.xml
new file mode 100644
index 000000000..d009ed4c4
--- /dev/null
+++ b/src/it/projects/MJAVADOC-619_copyright-year/pom.xml
@@ -0,0 +1,43 @@
+
+
+
+ 4.0.0
+
+ foo
+ bar
+ 0.1.0-SNAPSHOT
+
+
+ UTF-8
+ 2020-03-12T06:39:23Z
+
+
+
+
+
+ org.apache.maven.plugins
+ maven-javadoc-plugin
+ @project.version@
+
+
+
+
diff --git a/src/it/projects/MJAVADOC-619_copyright-year/src/main/java/foo/Bar.java b/src/it/projects/MJAVADOC-619_copyright-year/src/main/java/foo/Bar.java
new file mode 100644
index 000000000..e68b7043a
--- /dev/null
+++ b/src/it/projects/MJAVADOC-619_copyright-year/src/main/java/foo/Bar.java
@@ -0,0 +1,32 @@
+package foo;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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.
+ */
+
+/**
+ * Bar.
+ */
+public class Bar
+{
+ public void run()
+ {
+ System.out.println( "Bar" );
+ }
+
+}
diff --git a/src/it/projects/MJAVADOC-619_copyright-year/verify.groovy b/src/it/projects/MJAVADOC-619_copyright-year/verify.groovy
new file mode 100644
index 000000000..525b39c02
--- /dev/null
+++ b/src/it/projects/MJAVADOC-619_copyright-year/verify.groovy
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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.
+ */
+
+def file = new File( basedir, 'target/site/apidocs/options' )
+
+assert file.text.contains("'Copyright © 2020. All rights reserved.'")
diff --git a/src/main/java/org/apache/maven/plugins/javadoc/AbstractJavadocMojo.java b/src/main/java/org/apache/maven/plugins/javadoc/AbstractJavadocMojo.java
index db58e7750..0dbd61a4c 100644
--- a/src/main/java/org/apache/maven/plugins/javadoc/AbstractJavadocMojo.java
+++ b/src/main/java/org/apache/maven/plugins/javadoc/AbstractJavadocMojo.java
@@ -117,6 +117,8 @@
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardCopyOption;
+import java.time.format.DateTimeFormatter;
+import java.time.temporal.ChronoField;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
@@ -155,6 +157,11 @@
public abstract class AbstractJavadocMojo
extends AbstractMojo
{
+ /**
+ * Property with timestamp used for reproducible builds
+ */
+ private static final String PROJECT_BUILD_OUTPUTTIMESTAMP = "project.build.outputTimestamp";
+
/**
* Classifier used in the name of the javadoc-options XML file, and in the resources bundle
* artifact that gets attached to the project. This one is used for non-test javadocs.
@@ -923,9 +930,12 @@ public abstract class AbstractJavadocMojo
* Specifies the text to be placed at the bottom of each output file.
* If you want to use html, you have to put it in a CDATA section,
* e.g. <![CDATA[Copyright 2005, <a href="http://www.mycompany.com">MyCompany, Inc.<a>]]>
- *
+ *
+ * Note:If the project has the property project.build.outputTimestamp
, its year will
+ * be used as {currentYear}. This way it is possible to generate reproducible javadoc jars.
+ *
* See bottom.
- *
+ *
*/
@Parameter( property = "bottom",
defaultValue = "Copyright © {inceptionYear}–{currentYear} {organizationName}. "
@@ -2977,8 +2987,18 @@ private void populateCompileArtifactMap( Map compileArtifactMa
*/
private String getBottomText()
{
- int currentYear = Calendar.getInstance().get( Calendar.YEAR );
- String year = String.valueOf( currentYear );
+ final String year;
+ String buildTime = project.getProperties().getProperty( PROJECT_BUILD_OUTPUTTIMESTAMP );
+ if ( buildTime != null )
+ {
+ year = String.valueOf( DateTimeFormatter.ISO_DATE_TIME.parse( buildTime ).get( ChronoField.YEAR ) );
+ }
+ else
+ {
+ getLog().debug( "Using current year due to unavailable property '" + PROJECT_BUILD_OUTPUTTIMESTAMP + "'" );
+ int currentYear = Calendar.getInstance().get( Calendar.YEAR );
+ year = String.valueOf( currentYear );
+ }
String inceptionYear = project.getInceptionYear();