jpackage does not include extra files from app-image when creating Debian package?

Andy Herrick andy.herrick at
Sat Feb 27 13:42:11 UTC 2021

If you want to find the app dir directly on all platforms, use a command 
line option as Michael does in HalfPipe, except directly:


this $APPDIR will be expanded when jli is invoked to point to the 
applications app dir. ($BINDIR, and $ROOTDIR can be used in similar ways)


On 2/27/2021 6:51 AM, Tobias Oelgarte wrote:
> On 27.02.21 11:22, Michael Hall wrote:
>>> On Feb 27, 2021, at 1:31 AM, Tobias Oelgarte 
>>> <tobias.oelgarte at> wrote:
>>>> No, there is no platform independent and reliable way to get the 
>>>> path to 'app' directory. However you can get location of one of 
>>>> your app's classes through Class.getResource(). See 
>>>> <> 
>>> That isn't helpful at all. All i get is either the URL 
>>> jrt:/<modulename> or null, but not the installation directory or 
>>> something similar.
>> System property? java.home, java.launcher.path, java.library.path, 
>> java.class.path
>> My application indicates a security policy…
>> Which actually gets you into the app directory.
>> On virtual box Windows showing...
>> C:\Program Files\HalfPipe\app/all.policy
> java.home points to the runtime directory, which is fine, but it is 
> placed differently on Windows and Linux. In Windows it is 
> 'AppName/runtime' with app directory 'AppName/app' and under Linux it 
> is 'AppName/lib/runtime' with app directory 'AppName/app'. So i have 
> to query the operating system first, before deciding where the 'app' 
> directory would be. Additionally i can't create a *.deb including the 
> app folder, because jpackage fails to include the app directory.
> java.launcher.path is not available under Linux with JDK 16. Instead i 
> would have to use
> java.library.path is a list of paths pointing outside of the 
> application directory. For example: 
> '/usr/java/packages/lib:/usr/lib64:/lib64:/lib:/usr/lib'
> java.class.path is empty in case of a modular application.
> Using a security policy file is also an awkward way, to only get the 
> app directory. But at least it is doable.

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