Change api to separate html file and string processing.

lib/index.js

@@ -6,30 +6,22 @@ var inlineLess = require('./inline-less');
 var R = require('ramda');
 var Ru = require('@panosoft/ramda-utils');
 
+var inlineHtml = {};
 /**
  * Embed referenced local assets within and HTML file.
  *
  * @param {String} html
- *         Filename or html string.
  * @param {Object} options
  *
  * @return {Promise}
  */
-var inlineHtml = co.wrap(function * (html, options) {
+inlineHtml.html = co.wrap(function * (html, options) {
 	options = Ru.defaults({
 		filename: null,
 		less: {},
 		verbose: false
 	}, options || {});
-	var filename;
-	try {
-		filename = html;
-		html = yield fs.readFile(filename, 'utf8');
-	}
-	catch (error) {
-		if (error.code === 'ENOENT') filename = options.filename;
-		else throw error;
-	}
+	var filename = options.filename;
 
 	// Embed assets
 	var files = [filename];
@@ -53,11 +45,14 @@ var inlineHtml = co.wrap(function * (html, options) {
 	}
 
 	files = R.uniq(files);
-	var result = {
-		html,
-		files
-	};
+	var result = { html, files };
 	return (options.verbose ? result : result.html);
 });
 
+inlineHtml.file = co.wrap(function * (filename, options) {
+	var html = yield fs.readFile(filename, 'utf8');
+	options = R.merge(options || {}, {filename});
+	return yield inlineHtml.html(html, options);
+});
+
 module.exports = inlineHtml;