Embedded JavaScript

ejs.js

var File = function(name) {
    this.file = new java.io.File(name);
};

File.prototype.map = function(fn) {
    var fin = new java.util.Scanner(this.file);
    var content = [];
    while (fin.hasNextLine()) {
        content.push(fn(fin.nextLine()));
    }
    fin.close();
    return content;
};

var map = function(list, fn) {
    var rs = [];
    for (var i = 0; i < list.length; i++) {
        rs.push(fn(list[i]));
    }
    return rs;
};

var code = map(arguments, function(name) {
    var file = new File(name);
    return file.map(function(line) {
        if (line.charAt(0) === 37) {
            return line.substring(1).concat('\n');
        } else {
            return map(line.split("(?=\\[=)|(?<==\\])"), function(e) {
                if (e.matches('\\[=.*?=\\]')) {
                    return 'print(' + e.replaceAll('^\\[=|=\\]$', '') + ');\n';
                } else {
                    return 'print("' + e.replaceAll('"', '\\\\"') + '");\n';
                }
            }).join('') + 'print("\\n");\n';
        }
    }).join('');
}).join('\n');

eval(code);

ejs.sh

#!/bin/bash

exec jrunscript -f "$(cygpath -w "$HOME/lib/js/ejs.js")" $@