So I have an AEM website with the entire folder structure including the core package with java files. The way I'm currently exporting it to be able to run on any other machine is that I download the "samplewebsite.all.SNAPSHOT " through CRXDE and upload the same on the other machine through CRXDE. For the core package, I do a maven build and then upload the "samplewebsite.core.SNAPSHOT" jar through system/console/bundles. I'm curious to know if this process can be reduced down to just one package upload which contains the core package files as well?
When you have an AEM content package, with a bundle (JAR FILE) within the /apps/my-site/install folder, the when the AEM content package is installed into AEM, the bundle will be atomically installed by the OSGI installer, documentation: https://sling.apache.org/documentation/bundles/jcr-installer-provider.html; taking a look at the ui.apps (AEM content package) artefact produced by the aem-project-archetype, you can see the core bundle is embedded in the /apps/my-site/install folder.
if you are working with the latest archetype, it should happen with "all" package automatically. If you still have issues, see if you have mistakenly install a versioned package/jar file that is causing problems.