Include directory from resources while compiling native Image via gluon client maven plugin

[rnayabed]

I wrote a custom alert/combobox implementation for my project. Could not
use Gluon Mobile because its integrated tightly with our custom Theme
API. It works now!!

However, I have a small issue. My project root currently looks like this

root

 - src

 - resources

     - default/

         - config.xml

         - Themes/

         - Profiles/

         - Icons/

     - style.css

     - Roboto.ttf

When the config.xml file isnt found on local disk, the program just
copies all the contents of the default directory to the disk.

I am using gluon client and their maven plugin
However, when i try to get Main.class.getResource("default/").toURI()
it returns a nullpointer. i added -H:IncludeResources='*/*.*' to
<nativeImageArgs> but it doesnt work. I also tried adding that under
<resourcesList> but that too did not work.

Any leads on how I can embed all the directories/files/ everything from
the resources folder onto the native image

GraalVM Version : 20.2.0
Platform : x64 Linux

[kkriske]

The pattern passed to IncludeResources is a regex, see the docs: https://github.com/oracle/graal/blob/master/substratevm/Resources.md

So the "regex" */*.* simply does not what you think it does. To include everything in the default dir, adding default/.* should normally do the trick.

As for the resourceList option of the gluon maven plugin, it writes the pattern to a resources-config.json file, you have exactly the same problem there.

Small note of caution: the patterns count towards all files, not only files in the resource directory, as the content of src and resource directories normally get merged in jars, so adding .* will add everything, including class files, to resources, which you don't want.
Just be careful with broad wildcards.

[rnayabed]

@kkriske i tried -H:IncludeResources='Default/.*' but it did not work as well :(

The line new File(Main.class.getResource("Default/").toURI()) is causing NullPointerException

[kkriske]

What I think that's happening, without having the stacktrace: You are looking up a directory, which is not a resource, so getResource returns null. Looking up a file in the directory should work.

Walking through resources as a directory structure is not (yet) supported, as mentioned here: #2762 under Improve support for resource registration

[rnayabed]

@kkriske yes, looking up a file inside the resources folder work, but looking up directory doesnt. Ill try something like this new File(Main.class.getResource("Default/config.xml").toURI()).getAbsoluteFile().getParentFile()

[rnayabed]

@kkriske so now after pointing to the file and then going up one direcotry, it throws a java.lang.IllegalArgumentException: URI is not hierarchical :/

[rnayabed]

I think i need to zip the folder into a zip, and then unzip it

[rnayabed]

@kkriske I think I discovered an issue

class.getResourceAsStream("filename") works. But class.getResource("filename") returns resource:<file location>, which doesn't work if I want to read a file, copy it somewhere.

Closing it because in the end, what the workaround was to zip the directory, and then extract it to a location.