lib/models/asset-size-printer.js
'use strict';
const chalk = require('chalk');
const path = require('path');
const walkSync = require('walk-sync');
const workerpool = require('workerpool');
module.exports = class AssetPrinterSize {
constructor(options) {
Object.assign(this, options);
}
print() {
const { filesize } = require('filesize');
let ui = this.ui;
return this.makeAssetSizesObject().then((files) => {
if (files.length !== 0) {
ui.writeLine(chalk.green('File sizes:'));
return files.forEach((file) => {
let sizeOutput = filesize(file.size);
if (file.showGzipped) {
sizeOutput += ` (${filesize(file.gzipSize)} gzipped)`;
}
ui.writeLine(chalk.blue(` - ${file.name}: `) + sizeOutput);
});
} else {
ui.writeLine(chalk.red(`No asset files found in the path provided: ${this.outputPath}`));
}
});
}
printJSON() {
let ui = this.ui;
return this.makeAssetSizesObject().then((files) => {
if (files.length !== 0) {
let entries = files.map((file) => ({
name: file.name,
size: file.size,
gzipSize: file.gzipSize,
}));
ui.writeLine(JSON.stringify({ files: entries }));
} else {
ui.writeLine(chalk.red(`No asset files found in the path provided: ${this.outputPath}`));
}
});
}
async makeAssetSizesObject() {
let files = this.findFiles();
let testFileRegex = /(test-(loader|support))|(testem)/i;
// create a dedicated worker
const pool = workerpool.pool(`${__dirname}/worker.js`);
try {
let assets = files
// Skip test files
.filter((file) => {
let filename = path.basename(file);
return !testFileRegex.test(filename);
})
// Print human-readable file sizes (including gzipped)
.map((file) => {
return pool.exec('gzipStats', [file]);
});
return await Promise.all(assets);
} finally {
pool.terminate(); // terminate all workers when done
}
}
findFiles() {
let outputPath = this.outputPath;
try {
return walkSync(outputPath, {
directories: false,
})
.filter((x) => x.endsWith('.css') || x.endsWith('.js'))
.map((x) => path.join(outputPath, x));
} catch (e) {
if (e !== null && typeof e === 'object' && e.code === 'ENOENT') {
throw new Error(`No asset files found in the path provided: ${outputPath}`);
} else {
throw e;
}
}
}
};