first commit

build/node_modules/package-json/index.js

@@ -0,0 +1,54 @@
+'use strict';
+var url = require('url');
+var got = require('got');
+var registryUrl = require('registry-url');
+var registryAuthToken = require('registry-auth-token');
+var semver = require('semver');
+
+module.exports = function (name, version) {
+	var scope = name.split('/')[0];
+	var regUrl = registryUrl(scope);
+	var pkgUrl = url.resolve(regUrl, encodeURIComponent(name).replace(/^%40/, '@'));
+	var authInfo = registryAuthToken(regUrl);
+	var headers = {};
+
+	if (authInfo) {
+		headers.authorization = authInfo.type + ' ' + authInfo.token;
+	}
+
+	return got(pkgUrl, {
+		json: true,
+		headers: headers
+	})
+		.then(function (res) {
+			var data = res.body;
+
+			if (version === 'latest') {
+				data = data.versions[data['dist-tags'].latest];
+			} else if (version) {
+				if (!data.versions[version]) {
+					var versions = Object.keys(data.versions);
+					version = semver.maxSatisfying(versions, version);
+
+					if (!version) {
+						throw new Error('Version doesn\'t exist');
+					}
+				}
+
+				data = data.versions[version];
+
+				if (!data) {
+					throw new Error('Version doesn\'t exist');
+				}
+			}
+
+			return data;
+		})
+		.catch(function (err) {
+			if (err.statusCode === 404) {
+				throw new Error('Package `' + name + '` doesn\'t exist');
+			}
+
+			throw err;
+		});
+};