RFR: 8227529: With malformed --app-image the error messages are awful

Thu Nov 30 22:28:04 UTC 2023

On Thu, 30 Nov 2023 14:14:56 GMT, Alexey Semenyuk <asemenyuk at openjdk.org> wrote:

> Add tests to make sure jpackage emits meaningful error messages when used with invalid app images.
> 
> Added `JPackageCommand.nullableOutputBundle()` function that returns an empty `Optional` instance if it fails to deduce a path to the output bundle from jpackage command line. This is the case when jpackage command is used with `--app-image` cli option and referenced app image directory is missing `.jpackage.xml` file.

Looks good.

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Marked as reviewed by almatvee (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/16901#pullrequestreview-1758569694