yadsil/lib/yadsil.js

Yet Another Dead-SImple Log on stderr for CLI tools.

'use strict';
var Log, colors, util;

require('source-map-support').install();

util = require('util');

colors = require('colors');

Log = (function() {
  function Log(appName) {
    this.appName = appName;
    this.isTTY = process.stderr.isTTY;
    this.stderr = process.stderr;
    this.exitFunc = process.exit;
    this.haveColor = this.isTTY;
    this.isVerbose = false;
  }

  Log.prototype.verbose = function(value) {
    if (value == null) {
      return this.isVerbose;
    }
    return this.isVerbose = value;
  };

  Log.prototype.color = function(value) {
    if (value == null) {
      return this.haveColor;
    }
    return this.haveColor = value;
  };

  Log.prototype.any = function(args, level, color) {
    var message;
    message = util.format.apply(null, args);
    if (!this.isTTY) {
      this.stderr.write("" + this.appName + ": ");
    }
    if (level) {
      if (color && this.haveColor) {
        this.stderr.write("" + level[color] + ": ");
      } else {
        this.stderr.write("" + level + ": ");
      }
    }
    return this.stderr.write("" + message + "\n");
  };

  Log.prototype.fatal = function(errorCode) {
    this.any([].slice.apply(arguments).slice(1), 'fatal error', 'red');
    return this.exitFunc(errorCode);
  };

  Log.prototype.error = function() {
    return this.any(arguments, 'error', 'red');
  };

  Log.prototype.warning = function() {
    return this.any(arguments, 'warning', 'yellow');
  };

  Log.prototype.notice = function() {
    return this.any(arguments, 'notice', 'green');
  };

  Log.prototype.info = function() {
    if (!this.isVerbose) {
      return;
    }
    return this.any(arguments);
  };

  Log.prototype.debug = function() {
    if (!this.isVerbose) {
      return;
    }
    return this.any(arguments, 'debug', 'magenta');
  };

  return Log;

})();

module.exports = function(appName) {
  return new Log(appName);
};

/*
//@ sourceMappingURL=yadsil.js.map
*/