Initial pass

node_modules/pirates/lib/index.js

@@ -0,0 +1,118 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.addHook = addHook;
+
+var _module = _interopRequireDefault(require("module"));
+
+var _path = _interopRequireDefault(require("path"));
+
+var _nodeModulesRegexp = _interopRequireDefault(require("node-modules-regexp"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+/* (c) 2015 Ari Porad (@ariporad) <http://ariporad.com>. License: ariporad.mit-license.org */
+// Guard against poorly mocked module constructors.
+const Module = module.constructor.length > 1 ? module.constructor : _module.default;
+const HOOK_RETURNED_NOTHING_ERROR_MESSAGE = '[Pirates] A hook returned a non-string, or nothing at all! This is a' + ' violation of intergalactic law!\n' + '--------------------\n' + 'If you have no idea what this means or what Pirates is, let me explain: ' + 'Pirates is a module that makes is easy to implement require hooks. One of' + " the require hooks you're using uses it. One of these require hooks" + " didn't return anything from it's handler, so we don't know what to" + ' do. You might want to debug this.';
+
+function shouldCompile(filename, exts, matcher, ignoreNodeModules) {
+  if (typeof filename !== 'string') {
+    return false;
+  }
+
+  if (exts.indexOf(_path.default.extname(filename)) === -1) {
+    return false;
+  }
+
+  const resolvedFilename = _path.default.resolve(filename);
+
+  if (ignoreNodeModules && _nodeModulesRegexp.default.test(resolvedFilename)) {
+    return false;
+  }
+
+  if (matcher && typeof matcher === 'function') {
+    return !!matcher(resolvedFilename);
+  }
+
+  return true;
+}
+/**
+ * Add a require hook.
+ *
+ * @param {Function} hook - The hook. Accepts the code of the module and the filename. Required.
+ * @param {Object} [opts] - Options
+ * @param {String[]} [opts.exts=['.js']] - The extensions to hook. Should start with '.' (ex. ['.js']).
+ * @param {Function(path)} [opts.matcher] - A matcher function, will be called with path to a file. Should return truthy if the file should be hooked, falsy otherwise.
+ * @param {Boolean} [opts.ignoreNodeModules=true] - Auto-ignore node_modules. Independent of any matcher.
+ * @returns {Function} revert - Reverts the hooks.
+ */
+
+
+function addHook(hook, opts = {}) {
+  let reverted = false;
+  const loaders = [];
+  const oldLoaders = [];
+  let exts; // We need to do this to fix #15. Basically, if you use a non-standard extension (ie. .jsx), then
+  // We modify the .js loader, then use the modified .js loader for as the base for .jsx.
+  // This prevents that.
+
+  const originalJSLoader = Module._extensions['.js'];
+  const matcher = opts.matcher || null;
+  const ignoreNodeModules = opts.ignoreNodeModules !== false;
+  exts = opts.extensions || opts.exts || opts.extension || opts.ext || ['.js'];
+
+  if (!Array.isArray(exts)) {
+    exts = [exts];
+  }
+
+  exts.forEach(ext => {
+    if (typeof ext !== 'string') {
+      throw new TypeError(`Invalid Extension: ${ext}`);
+    }
+
+    const oldLoader = Module._extensions[ext] || originalJSLoader;
+    oldLoaders[ext] = oldLoader;
+
+    loaders[ext] = Module._extensions[ext] = function newLoader(mod, filename) {
+      let compile;
+
+      if (!reverted) {
+        if (shouldCompile(filename, exts, matcher, ignoreNodeModules)) {
+          compile = mod._compile;
+
+          mod._compile = function _compile(code) {
+            // reset the compile immediately as otherwise we end up having the
+            // compile function being changed even though this loader might be reverted
+            // Not reverting it here leads to long useless compile chains when doing
+            // addHook -> revert -> addHook -> revert -> ...
+            // The compile function is also anyway created new when the loader is called a second time.
+            mod._compile = compile;
+            const newCode = hook(code, filename);
+
+            if (typeof newCode !== 'string') {
+              throw new Error(HOOK_RETURNED_NOTHING_ERROR_MESSAGE);
+            }
+
+            return mod._compile(newCode, filename);
+          };
+        }
+      }
+
+      oldLoader(mod, filename);
+    };
+  });
+  return function revert() {
+    if (reverted) return;
+    reverted = true;
+    exts.forEach(ext => {
+      // if the current loader for the extension is our loader then unregister it and set the oldLoader again
+      // if not we can not do anything as we cannot remove a loader from within the loader-chain
+      if (Module._extensions[ext] === loaders[ext]) {
+        Module._extensions[ext] = oldLoaders[ext];
+      }
+    });
+  };
+}