Current File : /home/vacivi36/ava/.grunt/tasks/javascript.js
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/* jshint node: true, browser: false */
/* eslint-env node */
/**
* @copyright 2021 Andrew Nicols
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
/**
* Function to generate the destination for the uglify task
* (e.g. build/file.min.js). This function will be passed to
* the rename property of files array when building dynamically:
* http://gruntjs.com/configuring-tasks#building-the-files-object-dynamically
*
* @param {String} destPath the current destination
* @param {String} srcPath the matched src path
* @return {String} The rewritten destination path.
*/
const babelRename = function(destPath, srcPath) {
destPath = srcPath.replace('src', 'build');
destPath = destPath.replace('.js', '.min.js');
return destPath;
};
module.exports = grunt => {
// Load the Ignorefiles tasks.
require('./ignorefiles')(grunt);
// Load the Shifter tasks.
require('./shifter')(grunt);
// Load ESLint.
require('./eslint')(grunt);
// Load jsconfig.
require('./jsconfig')(grunt);
// Load JSDoc.
require('./jsdoc')(grunt);
const path = require('path');
// Register JS tasks.
grunt.registerTask('yui', ['eslint:yui', 'shifter']);
grunt.registerTask('amd', ['ignorefiles', 'eslint:amd', 'rollup']);
grunt.registerTask('js', ['amd', 'yui']);
// Register NPM tasks.
grunt.loadNpmTasks('grunt-contrib-uglify');
grunt.loadNpmTasks('grunt-contrib-watch');
grunt.loadNpmTasks('grunt-rollup');
const babelTransform = require('@babel/core').transform;
const babel = (options = {}) => {
return {
name: 'babel',
transform: (code, id) => {
grunt.log.debug(`Transforming ${id}`);
options.filename = id;
const transformed = babelTransform(code, options);
return {
code: transformed.code,
map: transformed.map
};
}
};
};
// Note: We have to use a rate limit plugin here because rollup runs all tasks asynchronously and in parallel.
// When we kick off a full run, if we kick off a rollup of every file this will fork-bomb the machine.
// To work around this we use a concurrent Promise queue based on the number of available processors.
const rateLimit = () => {
const queue = [];
let queueRunner;
const startQueue = () => {
if (queueRunner) {
return;
}
queueRunner = setTimeout(() => {
const limit = Math.max(1, require('os').cpus().length / 2);
grunt.log.debug(`Starting rollup with queue size of ${limit}`);
runQueue(limit);
}, 100);
};
// The queue runner will run the next `size` items in the queue.
const runQueue = (size = 1) => {
queue.splice(0, size).forEach(resolve => {
resolve();
});
};
return {
name: 'ratelimit',
// The options hook is run in parallel.
// We can return an unresolved Promise which is queued for later resolution.
options: async() => {
return new Promise(resolve => {
queue.push(resolve);
startQueue();
});
},
// When an item in the queue completes, start the next item in the queue.
buildEnd: () => {
runQueue();
},
};
};
const terser = require('rollup-plugin-terser').terser;
grunt.config.merge({
rollup: {
options: {
format: 'esm',
dir: 'output',
sourcemap: true,
treeshake: false,
context: 'window',
plugins: [
rateLimit(),
babel({
sourceMaps: true,
comments: false,
compact: false,
plugins: [
'transform-es2015-modules-amd-lazy',
'system-import-transformer',
// This plugin modifies the Babel transpiling for "export default"
// so that if it's used then only the exported value is returned
// by the generated AMD module.
//
// It also adds the Moodle plugin name to the AMD module definition
// so that it can be imported as expected in other modules.
path.resolve('.grunt/babel-plugin-add-module-to-define.js'),
'@babel/plugin-syntax-dynamic-import',
'@babel/plugin-syntax-import-meta',
['@babel/plugin-proposal-class-properties', {'loose': false}],
'@babel/plugin-proposal-json-strings'
],
presets: [
['@babel/preset-env', {
targets: {
browsers: [
">0.3%",
"last 2 versions",
"not ie >= 0",
"not op_mini all",
"not Opera > 0",
"not dead"
]
},
modules: false,
useBuiltIns: false
}]
]
}),
terser({
// Do not mangle variables.
// Makes debugging easier.
mangle: false,
}),
],
},
dist: {
files: [{
expand: true,
src: grunt.moodleEnv.files ? grunt.moodleEnv.files : grunt.moodleEnv.amdSrc,
rename: babelRename
}],
},
},
});
grunt.config.merge({
watch: {
amd: {
files: grunt.moodleEnv.inComponent
? ['amd/src/*.js', 'amd/src/**/*.js']
: ['**/amd/src/**/*.js'],
tasks: ['amd']
},
},
});
// Add the 'js' task as a startup task.
grunt.moodleEnv.startupTasks.push('js');
// On watch, we dynamically modify config to build only affected files. This
// method is slightly complicated to deal with multiple changed files at once (copied
// from the grunt-contrib-watch readme).
let changedFiles = Object.create(null);
const onChange = grunt.util._.debounce(function() {
const files = Object.keys(changedFiles);
grunt.config('rollup.dist.files', [{expand: true, src: files, rename: babelRename}]);
changedFiles = Object.create(null);
}, 200);
grunt.event.on('watch', function(action, filepath) {
changedFiles[filepath] = action;
onChange();
});
return {
babelRename,
};
};
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