Node JS version

node_modules/jake/lib/loader.js

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+/*
+ * Jake JavaScript build tool
+ * Copyright 2112 Matthew Eernisse (mde@fleegix.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+*/
+
+let path = require('path');
+let fs = require('fs');
+let existsSync = fs.existsSync;
+let utils = require('./utils');
+
+// Files like jakelib/foobar.jake.js
+const JAKELIB_FILE_PAT = /\.jake$|\.js$/;
+const SUPPORTED_EXTENSIONS = {
+  'js': null,
+  'coffee': function () {
+    try {
+      let cs = require('coffeescript');
+      if (typeof cs.register == 'function') {
+        cs.register();
+      }
+    }
+    catch(e) {
+      throw new Error('You have a CoffeeScript Jakefile, but have not installed CoffeeScript');
+    }
+  },
+  'ls': function () {
+    try {
+      require('livescript');
+    }
+    catch (e) {
+      throw new Error('You have a LiveScript Jakefile, but have not installed LiveScript');
+    }
+  },
+  'ts': function () {
+    try {
+      require('ts-node/register/transpile-only');
+    }
+    catch (e) {
+      throw new Error('You have a TypeScript Jakefile, but have not installed TypeScript and ts-node');
+    }
+  }
+};
+const IMPLICIT_JAKEFILE_NAMES = [
+  'Jakefile',
+  'Gulpfile'
+];
+
+let Loader = function () {
+  // Load a Jakefile, running the code inside -- this may result in
+  // tasks getting defined using the original Jake API, e.g.,
+  // `task('foo' ['bar', 'baz']);`, or can also auto-create tasks
+  // from any functions exported from the file
+  function loadFile(filePath) {
+    let exported = require(filePath);
+    for (let [key, value] of Object.entries(exported)) {
+      let t;
+      if (typeof value == 'function') {
+        t = jake.task(key, value);
+        t.description = '(Exported function)';
+      }
+    }
+  }
+
+  function fileExists(name) {
+    let nameWithExt = null;
+    // Support no file extension as well
+    let exts = Object.keys(SUPPORTED_EXTENSIONS).concat(['']);
+    exts.some((ext) => {
+      let fname = ext ? `${name}.${ext}` : name;
+      if (existsSync(fname)) {
+        nameWithExt = fname;
+        return true;
+      }
+    });
+    return nameWithExt;
+  }
+
+  // Recursive
+  function findImplicitJakefile() {
+    let cwd = process.cwd();
+    let names = IMPLICIT_JAKEFILE_NAMES;
+    let found = null;
+    names.some((name) => {
+      let n;
+      // Prefer all-lowercase
+      n = name.toLowerCase();
+      if ((found = fileExists(n))) {
+        return found;
+      }
+      // Check mixed-case as well
+      n = name;
+      if ((found = fileExists(n))) {
+        return found;
+      }
+    });
+    if (found) {
+      return found;
+    }
+    else {
+      process.chdir("..");
+      // If we've walked all the way up the directory tree,
+      // bail out with no result
+      if (cwd === process.cwd()) {
+        return null;
+      }
+      return findImplicitJakefile();
+    }
+  }
+
+  this.loadFile = function (fileSpecified) {
+    let jakefile;
+    let origCwd = process.cwd();
+
+    if (fileSpecified) {
+      if (existsSync(fileSpecified)) {
+        jakefile = fileSpecified;
+      }
+    }
+    else {
+      jakefile = findImplicitJakefile();
+    }
+
+    if (jakefile) {
+      let ext = jakefile.split('.')[1];
+      let loaderFunc = SUPPORTED_EXTENSIONS[ext];
+      loaderFunc && loaderFunc();
+
+      loadFile(utils.file.absolutize(jakefile));
+      return true;
+    }
+    else {
+      if (!fileSpecified) {
+        // Restore the working directory on failure
+        process.chdir(origCwd);
+      }
+      return false;
+    }
+  };
+
+  this.loadDirectory = function (d) {
+    let dirname = d || 'jakelib';
+    let dirlist;
+    dirname = utils.file.absolutize(dirname);
+    if (existsSync(dirname)) {
+      dirlist = fs.readdirSync(dirname);
+      dirlist.forEach(function (filePath) {
+        if (JAKELIB_FILE_PAT.test(filePath)) {
+          loadFile(path.join(dirname, filePath));
+        }
+      });
+      return true;
+    }
+    return false;
+  };
+
+};
+
+module.exports = function () {
+  return new Loader();
+};