Added a pathToReact option.

The option is an absolute path to the file which will be used to render the component.

If specified, it takes priority over the locally resolved one.

Re #1

README.md

@@ -5,7 +5,8 @@ react-render
 
 Handles the simple use case of loading in a component and rendering it to markup.
 
-To avoid version incompatibilities, React is resolved from the component's path.
+The renderer will attempt to avoid React version incompatibilities by resolving
+a path from your component to the local React package.
 
 
 Installation
@@ -41,6 +42,11 @@ reactRender({
   // markup. Defaults to false.
   toStaticMarkup: true
 
+  // An absolute path that can be used to load the version of React.
+  // If the renderer can not find React from the component's path, you
+  // can specify it.
+  pathToReact: '...'
+
 }, function(err, markup) {
   if (err) throw err;
 

lib/Component.js

@@ -50,6 +50,15 @@ Component.prototype.getComponent = function getComponent(cb) {
 Component.prototype.getReact = function getReact(cb) {
   if (this.React) return cb(null, this.React);
 
+  if (this.opts.pathToReact) {
+    try {
+      this.React = require(this.opts.pathToReact);
+    } catch(err) {
+      return cb(err);
+    }
+    return cb(null, this.React);
+  }
+
   this.getPath(function(err, _path) {
     if (err) return cb(err);
 

lib/index.js

@@ -3,7 +3,7 @@ var Component = require('./Component');
 var cache = require('./cache');
 
 var reactRender = function reactRender(opts, cb) {
-  var _opts = _.pick(opts, 'component', 'path');
+  var _opts = _.pick(opts, 'component', 'path', 'pathToReact');
 
   var component = cache.find(_opts);
 

test/Component.js

@@ -137,4 +137,16 @@ describe('Component', function() {
       done();
     });
   });
+  it('can accept an option denoting a path to react', function(done) {
+    var component = new Component({
+      path: Hello,
+      pathToReact: path.join(__dirname, '..', 'node_modules', 'react')
+    });
+
+    component.getReact(function(err, React) {
+      assert.isNull(err);
+      assert.strictEqual(React, require('react'));
+      done();
+    });
+  });
 });

test/index.js

@@ -154,4 +154,24 @@ describe('reactRender', function() {
       done();
     });
   });
+  it('can accept an option denoting a path to react', function(done) {
+    reactRender({
+      path: Hello,
+      pathToReact: path.join(__dirname, '..', 'node_modules', 'react'),
+      toStaticMarkup: true
+    }, function(err, markup) {
+      assert.isNull(err);
+      assert.equal(markup, '<div>Hello </div>');
+
+      reactRender({
+        path: Hello,
+        pathToReact: path.join(__dirname, '..', '..')
+      }, function(err, markup) {
+        assert.isNotNull(err);
+        assert.instanceOf(err, Error);
+        assert.isUndefined(markup);
+        done();
+      });
+    });
+  });
 });