build(core): add profile to create empty javadoc jar for release

Author: paul58914080

github-crawler-starter/pom.xml

@@ -41,4 +41,33 @@
       </plugin>
     </plugins>
   </build>
+  <profiles>
+    <profile>
+      <!-- The starter has no source, so Dokka produces no javadoc jar. Maven Central still
+           requires one, so we attach an empty javadoc jar for the release build. -->
+      <id>makeRelease</id>
+      <build>
+        <plugins>
+          <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-jar-plugin</artifactId>
+            <executions>
+              <execution>
+                <id>empty-javadoc-jar</id>
+                <phase>package</phase>
+                <goals>
+                  <goal>jar</goal>
+                </goals>
+                <configuration>
+                  <classifier>javadoc</classifier>
+                  <classesDirectory>${project.build.directory}/empty-javadoc</classesDirectory>
+                  <forceCreation>true</forceCreation>
+                </configuration>
+              </execution>
+            </executions>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
+  </profiles>
 </project>