extraDirectory should maintain same project structure

Description of the issue: Currently, when using <extraDirectories>, it dumps all files in the specific directory into the root of the docker container.

Expected behavior: Similar to while using src/main/jib/..., <extraDirectories> should just use the directory structure when copying it into the docker container.

Environment: Maven

[TadCordle]

I think I might understand. Jib just takes the contents of the directory you specify and moves it to the root directory in the image, which is intended. To get the files where you need them to go, you need to setup the exact intended destination directory structure within your extra directory.

If you want your secret files to be in /.build/secrets/decrypted on your container, for example, then you would need to configure your extra directory, and have the extra directory itself contain .build/secrets/decrypted/....

E.g. configure <extraDirectories><paths>${project.basedir}/secretsDir</paths></extraDirectories> then put your secret files in <project dir>/secretsDir/.build/secrets/decrypted/... to get your files in /.build/secrets/decrypted/ on your image.

But I think I can see why you might not want to do this, if the .build directory contains other files that you don’t want to add to the container, and you only want to add those secret files, but you don’t want to add them to /. Extra layers in Jib is still an incubating feature, though, so if the current design doesn’t match your use case and you have any suggestions for how you’d like it to work, feel free to let us know.

Let me know if this does/doesn’t make sense, or if I’m misinterpreting the problem!

[bspradling]

Hey @TadCordle. I have a single module Maven project and the following is the Jib plugin configuration within my pom.xml:

      <plugin>
        <groupId>com.google.cloud.tools</groupId>
        <artifactId>jib-maven-plugin</artifactId>
        <version>0.9.10</version>
        <configuration>
          <from>
            <image>anapsix/alpine-java:8_server-jre_unlimited</image>
          </from>
          <to>
            <image>my-image:built-with-jib</image>
          </to>
          <extraDirectories><paths>${project.basedir}/.build/secrets/decrypted</paths></extraDirectories>
        </configuration>
      </plugin>

I’m trying to mount some secret files from .build/secrets/decrypted but when the image is created, I can exec into the container and see the expected files in the root (/) directory.

Let me know if there is anything else that I can provide or I am doing something wrong!