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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');
}
}
};
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();
};