Vertical expansion mode

Instead of horizontal expansions with commas, which is supported only in
Sass. Vertical expansions (duplicate line with different content of
quoted string) work for a wider number of cases.

package.json

@@ -1,24 +1,32 @@
 {
-	"name": "import-glob-loader",
-	"version": "1.0.0",
-	"description": "Globbing preloader for Webpack",
-	"main": "index.js",
-	"scripts": {
-		"prepublish": "babel src/index.js -o index.js",
-		"test": "echo \"Error: no test specified\" && exit 1"
-	},
-	"keywords": [
-		"webpack",
-		"loader",
-		"glob"
-	],
-	"author": "Alex Lee <[email protected]>",
-	"license": "ISC",
-	"dependencies": {
-		"glob": "^5.0.13",
-		"loader-utils": "^0.2.10"
-	},
-	"devDependencies": {
-		"babel": "^5.6.14"
-	}
+  "name": "import-glob-loader",
+  "version": "1.0.0",
+  "description": "Globbing preloader for Webpack",
+  "main": "index.js",
+  "scripts": {
+    "prepublish": "babel src/index.js -o index.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [
+    "webpack",
+    "loader",
+    "glob"
+  ],
+  "author": "Alex Lee <[email protected]>",
+  "license": "ISC",
+  "dependencies": {
+    "glob": "^5.0.13",
+    "loader-utils": "^0.2.10"
+  },
+  "devDependencies": {
+    "babel": "^5.6.14"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/Aintaer/import-glob-loader.git"
+  },
+  "bugs": {
+    "url": "https://github.com/Aintaer/import-glob-loader/issues"
+  },
+  "homepage": "https://github.com/Aintaer/import-glob-loader#readme"
 }

src/index.js

@@ -7,21 +7,29 @@ export default function importGlob(source) {
 	options.nodir = typeof options.nodir !== 'undefined' ? options.nodir : true;
 	options.cwd = this.context;
 
-	let { test = "import", delimiter = ', ' } = options;
+	let { test = "import", delimiter = '\n' } = options;
 	const qualifier = new RegExp(`^.*\\b${test}\\b(.*)$`, 'gm');
 
-	function expandGlob(match, quote, content) {
-		if (!glob.hasMagic(content)) return match;
+	function expandGlob(result) {
+		if (!result) return;
+		const [match, quote, content] = result;
+		const offset = result.index;
+		const line = result.input;
+
+		if (!glob.hasMagic(content)) return;
+
+		let pre = line.slice(0, offset),
+			post = line.slice(offset + match.length);
 
 		return glob.sync(content, options)
-		.map(filename => `${quote}${filename}${quote}`)
+		.map(filename => `${pre}${quote}${filename}${quote}${post}`)
 		.join(delimiter);
 	}
 
-	const quotedString = /(['"])(.*?)\1/g;
+	const quotedString = /(['"])(.*?)\1/;
 	function expandLine(line, payload) {
-		if (!payload) return line;
-		return line.replace(quotedString, expandGlob);
+		if (!(payload && payload.trim())) return line;
+		return expandGlob(quotedString.exec(line)) || line;
 	}
 
 	return source.replace(qualifier, expandLine);