ensure nodejs library can pass an env parameter with the line

README.md

@@ -30,7 +30,8 @@ var options = {
     hostname: myHostname,
     ip: ipAddress,
     mac: macAddress,
-    app: appName
+    app: appName,
+    env: envName
 };
 
 // Defaults to false, when true ensures meta object will be searchable
@@ -141,6 +142,16 @@ Max Length: `32`
 
 The default hostname passed along with every log sent through this instance.
 
+##### env
+
+_**Optional**_
+Type: `String`
+Default: `''`
+Values: `YourCustomEnvironment`
+Max Length: `32`
+
+The default environment passed along with every log sent through this instance.
+
 ##### index_meta
 
 _**Optional**_
@@ -253,6 +264,16 @@ Max Length: `32`
 
 The app passed along with this log line.
 
+##### env
+
+_**Optional**_
+Type: `String`
+Default: `''`
+Values: `YourCustomEnvironment`
+Max Length: `32`
+
+The environment passed along with this log line.
+
 ##### meta
 
 _**Optional**_
@@ -301,7 +322,8 @@ var options = {
     hostname: myHostname,
     ip: ipAddress,
     mac: macAddress,
-    app: appName
+    app: appName,
+    env: envName
 };
 
 // Defaults to false, when true ensures meta object will be searchable

lib/logger.js

@@ -75,6 +75,7 @@ function Logger(key, options) {
         hostname: options.hostname || os.hostname()
         , app: options.app || 'default'
         , level: options.level || 'INFO'
+        , env: options.env || undefined
     };
 
     this._req = request.defaults({
@@ -106,6 +107,7 @@ Logger.prototype.log = function(statement, opts) {
         , line: statement
         , level: this.source.level
         , app: this.source.app
+        , env: this.source.env
     };
     if (opts) {
         if (_.isString(opts)) {
@@ -121,6 +123,7 @@ Logger.prototype.log = function(statement, opts) {
             }
             message.level = opts.level || message.level;
             message.app = opts.app || message.app;
+            message.env = opts.env || message.env;
             if (opts.timestamp && isValidTimestamp(opts.timestamp)) {
                 message.timestamp = opts.timestamp;
             }