57 lines
1.7 KiB
JavaScript
57 lines
1.7 KiB
JavaScript
/* eslint-disable no-undef */
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const assert = require('assert')
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const chalk = require('chalk')
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const fs = require('fs')
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const gzipSize = require('gzip-size').sync
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const path = require('path')
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const buildDir = path.join(__dirname, '../build')
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let entrypoints
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try {
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entrypoints = require(path.join(buildDir, 'asset-manifest.json')).entrypoints
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} catch (e) {
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console.log(chalk.yellow('You must build first: `yarn build`'))
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process.exit(1)
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}
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// The last recorded size for these assets, as reported by `yarn build`.
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const LAST_SIZE_MAIN_KB = 420
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// This is the async-loaded js, called <number>.<hash>.js, with a matching css file.
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const LAST_SIZE_ENTRY_KB = 1442
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const SIZE_TOLERANCE_KB = 10
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const jsEntrypoints = entrypoints.filter((entrypoint) => entrypoint.endsWith('js'))
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assert(jsEntrypoints.length === 3)
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let fail = false
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console.log('File sizes after gzip:\n')
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jsEntrypoints.forEach((entrypoint) => {
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const name = entrypoint.match(/\/([\w\d-]*)\./)[1]
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const size = gzipSize(fs.readFileSync(path.join(buildDir, entrypoint))) / 1024
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let maxSize = LAST_SIZE_ENTRY_KB + SIZE_TOLERANCE_KB
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if (name === 'runtime-main') {
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return
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} else if (name === 'main') {
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maxSize = LAST_SIZE_MAIN_KB + SIZE_TOLERANCE_KB
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}
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const report = `\t${size.toFixed(2).padEnd(8)}kB\t${chalk.dim(
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`max: ${maxSize.toFixed().padEnd(4)} kB`
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)}\t${entrypoint}`
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if (maxSize > size) {
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console.log(chalk.green(report))
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} else {
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console.log(chalk.red(report), '\tdid you import an unnecessary dependency?')
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fail = true
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}
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})
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if (fail) {
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console.log(chalk.yellow('\nOne or more of your files has grown too large.'))
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console.log(chalk.yellow('Reduce the file size or update the size limit (in scripts/test-size.js)'))
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process.exit(1)
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}
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