Ability to add file to a specific directory

Description of the issue: Some web apps require static files to be copied into resources’ staticdirectory. When adding arbitrary files to Jib, it can be more useful to be able to specify target directory.

Similar to the way that a JAR is constructed: https://github.com/oktadeveloper/okta-angular-deployment-example/blob/jar/notes-api/build.gradle.kts#L79

Current workaround is to copy the files into src/main/resources, but these are generated files and shouldn’t go into src. See https://github.com/oktadeveloper/okta-angular-deployment-example/blob/jar/notes-api/build.gradle.kts#L98

jib-gradle-plugin Configuration: See https://github.com/oktadeveloper/okta-angular-deployment-example/blob/jar/notes-api/build.gradle.kts#L98

Additional Information:

cc @mraible

[TadCordle]

I think this covers what you’re asking for: https://github.com/GoogleContainerTools/jib/issues/1581

tl;dr - extraDirectories will allow something similar to the following:

maven:

<extraDirectories>
  <paths>
    <path>
      <from>src/main/custom-dir</from>
      <into>/target/on/container</into>
    </path>
    ...
  </paths>
</extraDirectories>

gradle:

jib {
  extraDirectories {
    paths {
      path {
        from = 'src/main/custom-dir'
        into = '/target/on/container'
      }
      ...
    }
  }
}

[chanseokoh]

@saturnism @mraible Jib 2.3.0 is released with this very handy feature. Now you can designate target directories with jib.extraDirectories.paths.path.into. See https://github.com/GoogleContainerTools/jib/issues/1581#issuecomment-632393257 for an example.