preacher

Install

npm install --save preacher

Goal

• To easily integrate visionmedia's debug into any javascript logging framework for node or the browser.
• Lazy log level evaluation
• Easy log namespace management via spawning.

API

preacher(options = {})

Options:

• ### loggerToWrap (required)
  • Logging instance that is wrapped. Typically this would be winston, console or $log (angular).
• ### debugApi (optional)
  • A visionmedia debug instance if one is not provided then one is created for you.
• ### enable (optional)
  • Comma delimmited string. If it is not defined it defaults to debug's ENV variable of DEBUG.
• ### levelFns (optional)
  • Array of strings, typically ['info', 'warn', 'error']. Levels to evaulate and possibly wrap.
• ### doFileLine (optional)
  • boolean defaults to false. Currently this is for node only to diplay the file and line number of the log output.
• ### decorLevels (optional)
  • Array of strings, typically ['info', 'warn', 'error']. Levels to add lazy evaluation and decorations (color-wrap, file info) to.

Basic Example:

const preacher = require('preacher');
 
console.debug = console.log; // for example for node, no need in the browser
 
const rootLogger = preacher({
  loggerToWrap: console, // or $log
  enable: 'demo,other', //,hidden uncomment to unhide
  doFileLine: true});
 
const demoLogger = rootLogger('demo');
const otherLogger = rootLogger('other');
const hiddenLogger = rootLogger('hidden');
 
const log1 = demoLogger.spawn('worker1');
const log2 = demoLogger.spawn('worker2');
const log3 = demoLogger.spawn('worker3');
const log4 = otherLogger.spawn('worker4');
 
const log5 = hiddenLogger.spawn('worker5');
 
log1.error('not really an error.');
log1.info('info');
log1.warn('not really a warning.');
setInterval( () => log1.debug('one'), 1000);
setInterval( () => log1.debug.red('red'), 1000); // works but color is only for node
setInterval(() =>  log2.debug(() => 'two'), 1100);
setInterval(() =>  log3.debug('three'), 1200);
setInterval(() =>  log4.debug(() => 'four'), 1150);
setInterval(() =>  {
  // notice nothing is logged
  hiddenLogger.debug(() => 'hidden root');
  log5.debug(() => 'five');
}, 1155);