Override jar task for project with bootJar behavior

I just upgraded the Gradle SpringBoot plugin version to 2.5.2 and found out about the difference between the jar and bootJar tasks - the former builds an artifact suffixed with -plain.jar whereas the latter builds an actual executable artifact. I also have a custom plugin that consumes the output of the jar task as follows:

    @Override
    void apply(Project project) {
         project.copy {
                     from project.jar
                     into someDir
         }
    }

Given that project.jar is a -plain.jar that isn't actually executable, is there any way to modify the behavior of the jar task such that I won't have to modify the plugin? The artifact that is to be copied must be the executable application.

It looks like your plugin was relying on the jar and bootJar tasks creating a jar file with the same name. This isn’t ideal. For example, in the code that you have shown above, there’s no guarantee that bootJar will have built the executable jar file before it is copied. If at all possible, I would recommend updating the plugin to copy from bootJar rather than jar.

If you are unable to change the plugin, you should be able to reinstate the old behaviour by disabling the jar task and removing its classifier:

jar {
    enabled = false
    classifier = ''
}

This will resulting in the jar task having the same output location as the bootJar task and disable it so that the output from one task isn’t overwritten by the other.