wc.groovy

// g100pon #46 wc
cli = new CliBuilder(usage:"wc [-clmw] [file ...]")
cli.with {
    c longOpt:'bytes', 'The number of bytes in each input file is written to the standard output.  This will cancel out any prior usage of the -m option.'
    l longOpt:'length', 'The number of lines in each input file is written to the standard output.'
    m longOpt:'characters', 'The number of characters in each input file is written to the standard output.  If the current locale does not support multibyte characters, this is equivalent to the -c option.  This will cancel out any prior usage of the -c option.'
    w longOpt:'words', 'The number of words in each input file is written to the standard output.'
}

opt = cli.parse(args)
if (!opt.arguments().size()) {
    cli.usage()
    System.exit 0
}

def result = []
opt.arguments().each {
    def list = []
    if (opt.l) list << (new File(it).text =~ /(?m)(^.*$)/).size().toString().padLeft(6)
    if (opt.w) list << (new File(it).text =~ /(\S+\s*)/).size().toString().padLeft(6)
    if (opt.c || opt.m) list << new File(it).size().toString().padLeft(6)
    list << ' ' + it
    result << list.join('')
}
println result.join('\n')