!7

sS options = "-f 140/171"; // audio only
static File outputDir;

static StringBuilder output;

p {
  print("args: " + struct(args));
  S url = or2(first(args), "https://www.youtube.com/watch?v=99Q31nyH16w");
  
  // get youtube-dl
  File youtubeDL = installYouTubeDL();
  S outputTemplate = f2s(new File(or(outputDir, programDir()), "%(title)s-%(id)s.%(ext)s"));
  
  output = new StringBuilder;

  // update console title with percentages
  final new LastLineBuffer buf;
  O onOutput = voidfunc(S s) {
    S fixed = fixNewLines(s);
    buf.append(fixed);
    output.append(fixed);
    S percent = regexpFirstGroup("([0-9.]+)%", buf.lastCompleteLine());
    if (nempty(percent))
      consoleTitle(percent + "% - " + programTitle());
  };

  // do the job
  backtickToConsoleX(platformQuote(youtubeDL) + " " + options + " -o " + bashQuote(outputTemplate) + " " + platformQuote(url), onOutput);
  
  // done
  consoleTitle("DONE - " + programTitle());
}