Debug

script

// debug.js
// RV 2020-03-07 at 23:07

// Function to log to external file
// Captures console.log() to file in iCloud Drive.

// load js library from iCloud drive:
// require('debug.js'); // USE THIS at start of code!!

// insert next line anywhere in code for debug: 
// console.log(11, 'sample', 108, etc); // line # first!
// supply line number first, and then any variables
// separated by commas.

// Copy script below to iCloud Drive:
// as '/Drafts/Library/Scripts/debug.js'

// ------------- start of file ------------------
// debug.js
// Captures console.log() to file:
var captLog = '';
var clearLog = true; // clear log on first run

(function(){
    var oldLog = console.log;
    console.log = function (message) {
        captLog = Array.prototype.join.call(arguments, '\n\t');
        oldLog.apply(console, arguments);
        writeLog()
    };
})();

function writeLog() {
  // function to send log to external file
  const now = new Date();
  const tm = now.toString("yyyy-MM-dd HH:mm");
  
  let msg = 'line: ' + captLog;
  let shortMsg = msg.split('\n\t').join(': ').slice(0, 20);
  
  // For interactive log, use either (or none) of these two lines:
  // app.displayInfoMessage(shortMsg)
  alert(msg)
  
  let path = '/debug_log.txt';
  let fm = FileManager.create(false);
  log = fm.readString(path);
  if (clearLog) {
    log = tm + msg; // new log
    clearLog = false;
  } else {
    log = log + '\n' + tm + ': ' + msg; // append to log
  }
  let success = fm.writeString(path, log);
}
// -------------- end of file --------------

// Sample. To be used anywhere in code:
// code … 
console.log(60, 'sample: open this script for instructions!', 108, ['string', 15, false]); 
// code …