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gulpfile.js
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gulpfile.js
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// @ts-nocheck
var fs = require('fs'),
gulp = require('gulp'),
gutil = require('gulp-util'),
webpack = require('webpack'),
uglify = require('uglify-js'),
docgenerator = require('./tools/docgenerator');
var ENTRY = './index.js',
HEADER = './lib/header.js',
VERSION = './lib/version.js',
FILE = 'math.js',
FILE_MIN = 'math.min.js',
FILE_MAP = 'math.min.map',
DIST = __dirname + '/dist',
REF_SRC = './lib/',
REF_DEST = './docs/reference/functions/',
REF_ROOT = './docs/reference/',
MATH_JS = DIST + '/' + FILE;
// generate banner with today's date and correct version
function createBanner() {
var today = gutil.date(new Date(), 'yyyy-mm-dd'); // today, formatted as yyyy-mm-dd
var version = require('./package.json').version;
return String(fs.readFileSync(HEADER))
.replace('@@date', today)
.replace('@@version', version);
}
// generate a js file containing the version number
function updateVersionFile() {
var version = require('./package.json').version;
// generate file with version number
fs.writeFileSync(VERSION, 'module.exports = \'' + version + '\';\n' +
'// Note: This file is automatically generated when building math.js.\n' +
'// Changes made in this file will be overwritten.\n');
}
var bannerPlugin = new webpack.BannerPlugin({
banner: createBanner(),
entryOnly: true,
raw: true
});
var webpackConfig = {
entry: ENTRY,
output: {
library: 'math',
libraryTarget: 'umd',
path: DIST,
globalObject: 'this',
filename: FILE
},
externals: [
'crypto' // is referenced by decimal.js
],
plugins: [
bannerPlugin,
// new webpack.optimize.ModuleConcatenationPlugin()
// TODO: ModuleConcatenationPlugin seems not to work. https://medium.com/webpack/webpack-3-official-release-15fd2dd8f07b
],
optimization: {
minimize: false
},
cache: true
};
var uglifyConfig = {
sourceMap: {
filename: FILE,
url: FILE_MAP
},
output: {
comments: /@license/
}
};
// create a single instance of the compiler to allow caching
var compiler = webpack(webpackConfig);
gulp.task('bundle', ['validate'], function (cb) {
// update the banner contents (has a date in it which should stay up to date)
bannerPlugin.banner = createBanner();
updateVersionFile();
compiler.run(function (err, stats) {
if (err) {
gutil.log(err);
}
gutil.log('bundled ' + MATH_JS);
cb();
});
});
gulp.task('minify', ['bundle'], function () {
var oldCwd = process.cwd();
process.chdir(DIST);
try {
var result = uglify.minify({
'math.js': fs.readFileSync(FILE, "utf8")
}, uglifyConfig);
if (result.error) {
throw result.error
}
fs.writeFileSync(FILE_MIN, result.code);
fs.writeFileSync(FILE_MAP, result.map);
gutil.log('Minified ' + FILE_MIN);
gutil.log('Mapped ' + FILE_MAP);
} catch(e) {
throw e;
} finally {
process.chdir(oldCwd);
}
});
// test whether the docs for the expression parser are complete
gulp.task('validate', function (cb) {
var child_process = require('child_process');
// this is run in a separate process as the modules need to be reloaded
// with every validation (and required modules stay in cache).
child_process.execFile ('node', ['./tools/validate'], function(err, stdout, stderr) {
if (err instanceof Error) {
throw err;
}
process.stdout.write(stdout);
process.stderr.write(stderr);
cb();
});
});
gulp.task('docs', function () {
docgenerator.iteratePath(REF_SRC, REF_DEST, REF_ROOT);
});
// The watch task (to automatically rebuild when the source code changes)
// Does only generate math.js, not the minified math.min.js
gulp.task('watch', ['bundle'], function () {
gulp.watch(['index.js', 'lib/**/*.js'], ['bundle']);
});
// The default task (called when you run `gulp`)
gulp.task('default', ['bundle', 'minify', 'docs']);