jib-maven-plugin fails if maven-war-plugin "warName" property is set

Environment:

• Jib version: 1.8.0, 1.7.0
• Build tool: Maven 3.6.3
• OS: Fedora / Windows

Description of the issue: Between 1.6.1 and 1.7.0, the behaviour of the jib-maven-plugin changed and no longer works if the WAR name is not according to the default (artifactID-version.war), but changed using the “warName” property of the maven-war-plugin.

Expected behavior: Upgrading the jib-plugin from 1.6.1 to 1.7.0 does not change the result of the build.

Steps to reproduce: I created a small repository that you can clone: https://github.com/padyx/jib-test-repository

Working configuration (initial repository state):

1. Alter the pom.xml File in helloworld.ui.html.app.war and change the target image to a location you can push to.
2. Execute the build as follows: mvn -Djib.to.auth.username=xxxxx -Djib.to.auth.password=xxxxx -DskipTests -P docker clean package (Success)

Error if upgrading:

1. Change the jib-maven-plugin Version to 1.7.0 (or 1.8.0) in the helloworld/pom.xml File.
2. Rerun the build with the command above.

jib-maven-plugin Configuration:

<!-- From parent module (build / pluginManagement) -->
<plugin>
  <groupId>com.google.cloud.tools</groupId>
    <artifactId>jib-maven-plugin</artifactId>
    <version>1.7.0</version>
    <executions>
      <execution>
      <phase>package</phase>
      <goals>
        <goal>build</goal>
      </goals>
    </execution>
  </executions>
</plugin>

<!-- From build in actual module-->
<plugin>
  <groupId>com.google.cloud.tools</groupId>
  <artifactId>jib-maven-plugin</artifactId>
  <configuration>
    <from>
      <image>tomcat:9-jdk11</image>
    </from>
    <to>
      <image>padyx/testimage</image>
    </to>
  </configuration>
</plugin>

Log output: [ERROR] Failed to execute goal com.google.cloud.tools:jib-maven-plugin:1.7.0:build (default) on project helloworld.ui.html.app.war: Obtaining project build output files failed; make sure you have compiled your project before trying to build the image. (Did you accidentally run "mvn clean jib:build" instead of "mvn clean compile jib:build"?): /home/chakotay/eclipse-workspace/helloworld/helloworld.ui.html.app.war/target/org.eclipse.scout.apps.helloworld.ui.html.war -> [Help 1]

Additional information The configuration for the war name is: (helloworld.ui.html.app.war POM File)

<plugin>
  <artifactId>maven-war-plugin</artifactId>
  <configuration>
    <warName>uihtml</warName>
  </configuration>
</plugin>

[TadCordle]

@padyx 2.0.0 has been released with this fix!

[padyx]

Awesome, thank you! 😻 I tried this out locally by building 1.8.1-SNAPSHOT and I can confirm it works now.