/**
 * readFile
 * @param {string} filename - path to file, relative to Minecraft server root
 * @return {string}
 *
 * Reads the contents of a file from the filesystem.
 */
export function readFile(filename) {
    const FileReader = java.io.FileReader
    const BufferedReader = java.io.BufferedReader
    const buffered = new BufferedReader(new FileReader(filename))
    let code = ''
    let line
    while ((line = buffered.readLine()) !== null) {
        code += line + '\n'
    }
    buffered.close()
    return code
}