nashorn-jjs-node-polyfill.js

if (typeof console === 'undefined') {
    // also see
    //
    // https://blogs.oracle.com/nashorn/entry/setinterval_and_settimeout_javascript_functions
    // https://gist.github.com/kayhadrin/4bf141103420b79126e434dfcf6d4826
    //
    // https://avatar-js.java.net/index.html
    // https://java.net/projects/avatar-js/sources
  
    var console = {};
    console.debug = print;
    console.log = print;
    console.warn = print;
    console.error = print;

    var global = this;
    var window = this;

    process = {
        env: new JSAdapter({
            __get__ : function (name) {
                    return java.lang.System.getenv(name);
            },
            __has__ : function (name) {
                    return java.lang.System.getenv().containsKey(name);
            },
            __getIds__ : function() {
                    return java.lang.System.getenv().keySet().toArray();
            },
            __delete__ : function(name) {
                    println("can't delete env item");
            },
            __put__ : function (name, value) {
                    println("can't change env item");
            },
            toJSON: function() {
                    return java.lang.System.getenv().toString();
            },
            toString: function() {
                    return java.lang.System.getenv().toString();
            }
        }),
        argv: [
            'jjs',
            'this',
        ].concat(arguments)
    };
}

console.log('args', Object.keys(process.env));