1 files changed, 93 insertions, 0 deletions
diff --git a/node_modules/enhanced-resolve/lib/DescriptionFileUtils.js b/node_modules/enhanced-resolve/lib/DescriptionFileUtils.js
new file mode 100644
index 000000000..084d29ec9
--- /dev/null
+++ b/node_modules/enhanced-resolve/lib/DescriptionFileUtils.js
@@ -0,0 +1,93 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+var forEachBail = require("./forEachBail");
+
+function loadDescriptionFile(resolver, directory, filenames, callback) {
+	(function findDescriptionFile() {
+		forEachBail(filenames, function(filename, callback) {
+			var descriptionFilePath = resolver.join(directory, filename);
+			if(resolver.fileSystem.readJson) {
+				resolver.fileSystem.readJson(descriptionFilePath, function(err, content) {
+					if(err) {
+						if(typeof err.code !== "undefined") return callback();
+						return onJson(err);
+					}
+					onJson(null, content);
+				});
+			} else {
+				resolver.fileSystem.readFile(descriptionFilePath, function(err, content) {
+					if(err) return callback();
+					try {
+						var json = JSON.parse(content);
+					} catch(e) {
+						onJson(e);
+					}
+					onJson(null, json);
+				});
+			}
+
+			function onJson(err, content) {
+				if(err) {
+					if(callback.log)
+						callback.log(descriptionFilePath + " (directory description file): " + err);
+					else
+						err.message = descriptionFilePath + " (directory description file): " + err;
+					return callback(err);
+				}
+				callback(null, {
+					content: content,
+					directory: directory,
+					path: descriptionFilePath
+				});
+			}
+		}, function(err, result) {
+			if(err) return callback(err);
+			if(result) {
+				return callback(null, result);
+			} else {
+				directory = cdUp(directory);
+				if(!directory) {
+					return callback();
+				} else {
+					return findDescriptionFile();
+				}
+			}
+		});
+	}());
+}
+
+function getField(content, field) {
+	if(!content) return undefined;
+	if(Array.isArray(field)) {
+		var current = content;
+		for(var j = 0; j < field.length; j++) {
+			if(current === null || typeof current !== "object") {
+				current = null;
+				break;
+			}
+			current = current[field[j]];
+		}
+		if(typeof current === "object") {
+			return current;
+		}
+	} else {
+		if(typeof content[field] === "object") {
+			return content[field];
+		}
+	}
+}
+
+function cdUp(directory) {
+	if(directory === "/") return null;
+	var i = directory.lastIndexOf("/"),
+		j = directory.lastIndexOf("\\");
+	var p = i < 0 ? j : j < 0 ? i : i < j ? j : i;
+	if(p < 0) return null;
+	return directory.substr(0, p || 1);
+}
+
+exports.loadDescriptionFile = loadDescriptionFile;
+exports.getField = getField;
+exports.cdUp = cdUp;