WIP - add extractor, generate snippet_data

node_modules/enhanced-resolve/lib/DirectoryExistsPlugin.js

@@ -0,0 +1,33 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+module.exports = class DirectoryExistsPlugin {
+	constructor(source, target) {
+		this.source = source;
+		this.target = target;
+	}
+
+	apply(resolver) {
+		const target = resolver.ensureHook(this.target);
+		resolver.getHook(this.source).tapAsync("DirectoryExistsPlugin", (request, resolveContext, callback) => {
+			const fs = resolver.fileSystem;
+			const directory = request.path;
+			fs.stat(directory, (err, stat) => {
+				if(err || !stat) {
+					if(resolveContext.missing) resolveContext.missing.add(directory);
+					if(resolveContext.log) resolveContext.log(directory + " doesn't exist");
+					return callback();
+				}
+				if(!stat.isDirectory()) {
+					if(resolveContext.missing) resolveContext.missing.add(directory);
+					if(resolveContext.log) resolveContext.log(directory + " is not a directory");
+					return callback();
+				}
+				resolver.doResolve(target, request, "existing directory", resolveContext, callback);
+			});
+		});
+	}
+};