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shrine-medco/shrine-webclient/src/main/html/node_modules/resolve/lib/async.js
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async.js
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			var core = require('./core');
			var fs = require('fs');
			var path = require('path');
			var caller = require('./caller.js');
			var nodeModulesPaths = require('./node-modules-paths.js');
			var splitRe = process.platform === 'win32' ? /[\/\\]/ : /\//;

			module.exports = function resolve (x, opts, cb) {
			if (typeof opts === 'function') {
			cb = opts;
			opts = {};
			}
			if (!opts) opts = {};
			if (typeof x !== 'string') {
			return process.nextTick(function () {
			cb(new Error('path must be a string'));
			});
			}

			var isFile = opts.isFile \|\| function (file, cb) {
			fs.stat(file, function (err, stat) {
			if (err && err.code === 'ENOENT') cb(null, false)
			else if (err) cb(err)
			else cb(null, stat.isFile() \|\| stat.isFIFO())
			});
			};
			var readFile = opts.readFile \|\| fs.readFile;

			var extensions = opts.extensions \|\| [ '.js' ];
			var y = opts.basedir \|\| path.dirname(caller());

			opts.paths = opts.paths \|\| [];

			if (/^(?:\.\.?(?:\/\|$)\|\/\|([A-Za-z]:)?[\\\/])/.test(x)) {
			var res = path.resolve(y, x);
			if (x === '..') res += '/';
			if (/\/$/.test(x) && res === y) {
			loadAsDirectory(res, opts.package, onfile);
			}
			else loadAsFile(res, opts.package, onfile);
			}
			else loadNodeModules(x, y, function (err, n, pkg) {
			if (err) cb(err)
			else if (n) cb(null, n, pkg)
			else if (core[x]) return cb(null, x);
			else cb(new Error("Cannot find module '" + x + "' from '" + y + "'"))
			});

			function onfile (err, m, pkg) {
			if (err) cb(err)
			else if (m) cb(null, m, pkg)
			else loadAsDirectory(res, function (err, d, pkg) {
			if (err) cb(err)
			else if (d) cb(null, d, pkg)
			else cb(new Error("Cannot find module '" + x + "' from '" + y + "'"))
			})
			}

			function loadAsFile (x, pkg, cb) {
			if (typeof pkg === 'function') {
			cb = pkg;
			pkg = undefined;
			}

			var exts = [''].concat(extensions);
			load(exts, x, pkg)

			function load (exts, x, pkg) {
			if (exts.length === 0) return cb(null, undefined, pkg);
			var file = x + exts[0];

			if (pkg) onpkg(null, pkg)
			else loadpkg(path.dirname(file), onpkg);

			function onpkg (err, pkg_, dir) {
			pkg = pkg_;
			if (err) return cb(err)
			if (dir && pkg && opts.pathFilter) {
			var rfile = path.relative(dir, file);
			var rel = rfile.slice(0, rfile.length - exts[0].length);
			var r = opts.pathFilter(pkg, x, rel);
			if (r) return load(
			[''].concat(extensions.slice()),
			path.resolve(dir, r),
			pkg
			);
			}
			isFile(file, onex);
			}
			function onex (err, ex) {
			if (err) cb(err)
			else if (!ex) load(exts.slice(1), x, pkg)
			else cb(null, file, pkg)
			}
			}
			}

			function loadpkg (dir, cb) {
			if (dir === '' \|\| dir === '/') return cb(null);
			if (process.platform === 'win32' && /^\w:[\\\/]*$/.test(dir)) {
			return cb(null);
			}
			if (/[\\\/]node_modules[\\\/]*$/.test(dir)) return cb(null);

			var pkgfile = path.join(dir, 'package.json');
			isFile(pkgfile, function (err, ex) {
			// on err, ex is false
			if (!ex) return loadpkg(
			path.dirname(dir), cb
			);

			readFile(pkgfile, function (err, body) {
			if (err) cb(err);
			try { var pkg = JSON.parse(body) }
			catch (err) {}

			if (pkg && opts.packageFilter) {
			pkg = opts.packageFilter(pkg, pkgfile);
			}
			cb(null, pkg, dir);
			});
			});
			}

			function loadAsDirectory (x, fpkg, cb) {
			if (typeof fpkg === 'function') {
			cb = fpkg;
			fpkg = opts.package;
			}

			var pkgfile = path.join(x, '/package.json');
			isFile(pkgfile, function (err, ex) {
			if (err) return cb(err);
			if (!ex) return loadAsFile(path.join(x, '/index'), fpkg, cb);

			readFile(pkgfile, function (err, body) {
			if (err) return cb(err);
			try {
			var pkg = JSON.parse(body);
			}
			catch (err) {}

			if (opts.packageFilter) {
			pkg = opts.packageFilter(pkg, pkgfile);
			}

			if (pkg.main) {
			if (pkg.main === '.' \|\| pkg.main === './'){
			pkg.main = 'index'
			}
			loadAsFile(path.resolve(x, pkg.main), pkg, function (err, m, pkg) {
			if (err) return cb(err);
			if (m) return cb(null, m, pkg);
			if (!pkg) return loadAsFile(path.join(x, '/index'), pkg, cb);

			var dir = path.resolve(x, pkg.main);
			loadAsDirectory(dir, pkg, function (err, n, pkg) {
			if (err) return cb(err);
			if (n) return cb(null, n, pkg);
			loadAsFile(path.join(x, '/index'), pkg, cb);
			});
			});
			return;
			}

			loadAsFile(path.join(x, '/index'), pkg, cb);
			});
			});
			}

			function loadNodeModules (x, start, cb) {
			(function process (dirs) {
			if (dirs.length === 0) return cb(null, undefined);
			var dir = dirs[0];

			var file = path.join(dir, '/', x);
			loadAsFile(file, undefined, onfile);

			function onfile (err, m, pkg) {
			if (err) return cb(err);
			if (m) return cb(null, m, pkg);
			loadAsDirectory(path.join(dir, '/', x), undefined, ondir);
			}

			function ondir (err, n, pkg) {
			if (err) return cb(err);
			if (n) return cb(null, n, pkg);
			process(dirs.slice(1));
			}
			})(nodeModulesPaths(start, opts));
			}
			};