Add basic linting rules

.eslintignore

@@ -0,0 +1,2 @@
+node_modules
+usage.js

.eslintrc.json

@@ -0,0 +1,8 @@
+{
+    "env": {
+        "node": true
+    },
+    "rules": {
+        "no-unused-vars": "error"
+    }
+}

.gitignore

@@ -10,3 +10,4 @@ node_modules/
 node_modules/*
 npm-debug.log
 coverage
+package-lock.json

lib/nconf.js

@@ -5,8 +5,7 @@
  *
  */
 
-var async = require('async'),
-    common = require('./nconf/common'),
+var common = require('./nconf/common'),
     Provider = require('./nconf/provider').Provider;
 
 //

lib/nconf/provider.js

@@ -91,7 +91,6 @@ Provider.prototype.file = function (key, options) {
 //
 Provider.prototype.use = function (name, options) {
   options  = options      || {};
-  var type = options.type || name;
 
   function sameOptions (store) {
     return Object.keys(options).every(function (key) {

lib/nconf/stores/file.js

@@ -10,8 +10,9 @@ var fs = require('fs'),
     util = require('util'),
     Secure = require('secure-keys'),
     formats = require('../formats'),
-    Memory = require('./memory').Memory,
-    exists = fs.exists || path.exists,
+    Memory = require('./memory').Memory;
+
+var exists = fs.exists || path.exists,
     existsSync = fs.existsSync || path.existsSync;
 
 //
@@ -83,12 +84,10 @@ File.prototype.save = function (value, callback) {
 
 //
 // ### function saveSync (value, callback)
-// #### @value {Object} _Ignored_ Left here for consistency
-// #### @callback {function} **Optional** Continuation to respond to when complete.
 // Saves the current configuration object to disk at `this.file`
 // using the format specified by `this.format` synchronously.
 //
-File.prototype.saveSync = function (value) {
+File.prototype.saveSync = function () {
   fs.writeFileSync(this.file, this.stringify());
   return this.store;
 };
@@ -168,8 +167,7 @@ File.prototype.loadSync = function () {
 // `this.secure` is enabled
 //
 File.prototype.stringify = function () {
-  var data = this.store,
-      self = this;
+  var data = this.store;
 
   if (this.secure) {
     data = this.keys.encrypt(data);
@@ -184,8 +182,7 @@ File.prototype.stringify = function () {
 // `this.secure` is enabled.
 //
 File.prototype.parse = function (contents) {
-  var parsed = this.format.parse(contents),
-      self = this;
+  var parsed = this.format.parse(contents);
 
   if (!this.secure) {
     return parsed;

package.json

@@ -20,6 +20,7 @@
   },
   "devDependencies": {
     "coveralls": "^2.11.4",
+    "eslint": "^4.9.0",
     "istanbul": "^0.4.1",
     "vows": "0.8.x"
   },
@@ -27,7 +28,8 @@
   "scripts": {
     "test": "vows test/*-test.js test/**/*-test.js --spec",
     "cover": "istanbul cover vows -- test/*-test.js test/**/*-test.js  --spec",
-    "coveralls": "cat coverage/lcov.info | coveralls"
+    "coveralls": "cat coverage/lcov.info | coveralls",
+    "lint": "eslint ."
   },
   "engines": {
     "node": ">= 0.4.0"

test/common-test.js

@@ -8,7 +8,6 @@
 var fs = require('fs'),
     path = require('path'),
     vows = require('vows'),
-    assert = require('assert'),
     helpers = require('./helpers'),
     nconf = require('../lib/nconf');
 

test/complete-test.js

@@ -6,7 +6,6 @@
  */
 
 var fs = require('fs'),
-    path = require('path'),
     vows = require('vows'),
     assert = require('assert'),
     nconf = require('../lib/nconf'),

test/fixtures/scripts/nconf-hierarchical-load-save.js

@@ -5,8 +5,7 @@
  *
  */
 
-var fs = require('fs'),
-    path = require('path'),
+var path = require('path'),
     nconf = require('../../../lib/nconf');
 
 //

test/helpers.js

@@ -7,7 +7,6 @@
 
 var assert = require('assert'),
     spawn = require('child_process').spawn,
-    util = require('util'),
     fs = require('fs'),
     path = require('path'),
     nconf = require('../lib/nconf');

test/hierarchy-test.js

@@ -54,7 +54,9 @@ vows.describe('nconf/hierarchy').addBatch({
             child;
 
         try { fs.unlinkSync(configFile) }
-        catch (ex) { }
+        catch (ex) { 
+          // No-op
+        }
 
         child = spawn('node', [script].concat(argv));
 

test/nconf-test.js

@@ -9,8 +9,7 @@ var fs = require('fs'),
     path = require('path'),
     vows = require('vows'),
     assert = require('assert'),
-    nconf = require('../lib/nconf'),
-    data = require('./fixtures/data').data;
+    nconf = require('../lib/nconf')
 
 vows.describe('nconf').addBatch({
   "When using the nconf": {

test/provider-test.js

@@ -8,7 +8,6 @@
 var assert = require('assert'),
     fs = require('fs'),
     path = require('path'),
-    spawn = require('child_process').spawn,
     vows = require('vows'),
     helpers = require('./helpers'),
     nconf = require('../lib/nconf');

test/stores/argv-test.js

@@ -7,7 +7,6 @@
 
 var vows = require('vows'),
     assert = require('assert'),
-    helpers = require('../helpers'),
     nconf = require('../../lib/nconf');
 
 vows.describe('nconf/stores/argv').addBatch({

test/stores/env-test.js

@@ -7,7 +7,6 @@
 
 var vows = require('vows'),
     assert = require('assert'),
-    helpers = require('../helpers'),
     nconf = require('../../lib/nconf');
 
 vows.describe('nconf/stores/env').addBatch({

test/stores/literal-test.js

@@ -7,7 +7,6 @@
 
 var vows = require('vows'),
     assert = require('assert'),
-    helpers = require('../helpers'),
     nconf = require('../../lib/nconf');
 
 vows.describe('nconf/stores/literal').addBatch({