Adding a JAR to jarman - teunjojo/jarman GitHub Wiki
The following shows an example of how to add ViaVersion.jar
to jarman. The file does NOT need to exist already as it will be downloaded automatically using jarman. Except the filename is the name that the file will ultimately get and can be anything as long as it ends with .jar
$ ./jarman.sh ~/mcserver/plugins/ --add "ViaVersion.jar"
After registering the JAR file will be downloaded using jarman. For the registration process, see: