[Jython-users] Using Jbang to run Jython scripts with Maven dependencies

[Werner F. <wer...@gm...>]

 Jython scripts occasionally require access to JAR files from Maven
Central. Unlike Groovy, Jython lacks a built-in mechanism to resolve these
dependencies. However, one can bootstrap a Jython script along with its
Maven dependencies using JBang. This technique ensures that your Jython
scripts can seamlessly access the necessary dependencies from Maven
Central. See https://www.jbang.dev/ for information about JBang.

<Step 1> - create file *Jython.java* with JBang support and required Maven
dependencies.

----------
///usr/bin/env jbang "$0" "$@" ; exit $?
//DEPS org.python:jython-standalone:2.7.4
//DEPS io.leego:banana:2.1.0
import org.python.util.jython;
public class Jython {
    public static void main(String... args) {
        jython.main(args);
    }
}
----------

<Step 2> - create a Jython script (*test.py*)

----------
from __future__ import print_function

import io.leego.banana.BananaUtils as BananaUtils
import io.leego.banana.Font as Font

text0 = "Jython 2.7"
text1 = BananaUtils.bananaify(text0, Font.STANDARD)

print(text1)
----------

<Step 3> -run the Jython script

$ jbang run Jython.java test.py

[jbang] Resolving dependencies...
[jbang]    org.python:jython-standalone:2.7.4
[jbang]    io.leego:banana:2.1.0
[jbang] Dependencies resolved
[jbang] Building jar for Jython.java...
Jython 2.7    # Displayed as banner text

Happy Jython scripting!
-- 
Werner Fouché