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getter is a little Java program that is useful inside containers where curl is not yet installed. It downloads a tgz file and streams it to a locally installed tar executable to extract the contents.

./gradlew textEncodeClasses

The base64 encoded version of GetTgz is located in build/classesAsText

You can then reconstitute the java class file on a remote system by echoing the contents of the b64 file via base64 decoding and un-gzipping:

echo "...contents of b64 file..."  | base64 -d | gzip -d > GetTgz.class