Add environment parser.

.jshintrc

@@ -0,0 +1,6 @@
+{
+    "node": true,
+    "laxcomma": true,
+    "sub": true,
+    "expr": true
+}

README.md

@@ -2,7 +2,7 @@
 
 # CLogger #
 
-A [node.js](http://nodejs.org) module with various configurable and
+A [node.js](http://nodejs.org) logging module with various configurable and
 extendable transports. As per default, the **CLogger** prints its
 colored messages to the node-console, but it can be configured to
 logs to a [TaffyDB](http://www.taffydb.com) instance, a log-file

lib/clogger.js

@@ -9,7 +9,8 @@ var _ = require('lodash')
  * @param {string} id (optional) - An internal identifier.
  * @param {object} opts (optional) - An object, holding options to configure the logger instance.
  * At the moment, the only configurable options, are an array of transports to be used and an
- * array of visible log-levels.
+ * array of visible log-levels. Log-levels can be given as environment-variables in the form of
+ * 'VISIBLE=info,warn,error node app.js'.
  * @example
  * var clogger = require('node-clogger');
  * var logger = new clogger.CLogger('server', {
@@ -23,7 +24,7 @@ var _ = require('lodash')
 function CLogger(id, opts) {
     if (arguments.length === 1 && _.isPlainObject(id)) {
         config = id;
-        id = 'default'
+        id = 'default';
     }
 
     this.id = id || 'default';
@@ -40,7 +41,7 @@ function CLogger(id, opts) {
             'debug',
             'error'
         ]
-    }).load(opts || {});
+    }).load(opts || {}).parseEnv();
 }
 
 /**
@@ -77,7 +78,7 @@ CLogger.prototype.log = function(level, message) {
     var args = _.toArray(arguments).slice(2)
         , visible = this.config.getValue('visible');
 
-    if (visible.indexOf(level) > -1) {
+    if ((_.isString(visible) && visible === level) || (_.isArray(visible) && _.indexOf(visible, level) > -1)) {
         var timestamp = new Date().getTime();
 
         message = util.format.apply(null, [message].concat(args));
@@ -163,6 +164,6 @@ CLogger.prototype.extend = function(obj) {
     } else {
         throw new TypeError('CLogger extends only "objects"!');
     }
-}
+};
 
 module.exports = CLogger;

test/clogger.spec.js

@@ -48,7 +48,7 @@ describe('CLogger', function() {
         logger.warn('dlc');
         logger.debug('dlc');
 
-        logger.config.getValue('visible').push('trace');
+        logger.config.getValue('visible', ['info', 'warn', 'trace']);
         logger.trace('dlc');
     });
 });