override with username based props

theteam · Sep 23, 2010 · 3ad3199 · 3ad3199
1 parent 7055dc3
commit 3ad3199
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Showing 2 changed files with 18 additions and 5 deletions.
diff --git a/README.md b/README.md
@@ -6,9 +6,9 @@ Node properties allows you to externalise configuration in a consistent manner u
 
 From the root of your application (where the executing directory will be) create a folder called properties and a file within this called 'build.json'.  Then in your application require this module and access your properties directly. An example is reading the port to start your application on:
 
+<pre>
   var props = require('properties');
   console.log(props.port); 
+</pre>
 
-# Future Scope
-
-I'd like to be able to get the current executing username and read a file called username.json and override any properties from the build file to allow simple local customisation.
+You can override properties by supplying a JSON file with the same name as the user who is executing the process, e.g. properties/robbieclutton.json.  Any properties included here will overwrite those in the build.json file enabling local customisations.
diff --git a/lib/properties.js b/lib/properties.js
@@ -1,12 +1,25 @@
 var fs = require('fs');
 
-var baseProperties = process.cwd() + '/properties/build.json';
+var username = process.ENV['USER'];
+var base_properties_file = process.cwd() + '/properties/build.json';
+var user_properties_file = process.cwd() + '/properties/' + username + '.json';
 var properties = {};
+var user_properties = {};
 
 try {
-	properties = JSON.parse(fs.readFileSync(baseProperties, 'utf8'));	
+	properties = JSON.parse(fs.readFileSync(base_properties_file, 'utf8'));	
 } catch (err){
 	console.log(err);
 }
 
+try {
+	user_properties = JSON.parse(fs.readFileSync(user_properties_file, 'utf8'));	
+} catch (err){
+	// do nothing and don't override
+}
+
+for (attrname in user_properties) { 
+	properties[attrname] = user_properties[attrname]; 
+}
+
 module.exports = properties;