pinafore/bin/globalize-css.js

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#!/usr/bin/env node
// Change all the Svelte CSS to just use globals everywhere,
// to reduce CSS size and complexity.
const path = require('path')
const fs = require('fs')
const pify = require('pify')
const writeFile = pify(fs.writeFile.bind(fs))
const readFile = pify(fs.readFile.bind(fs))
const glob = pify(require('glob'))
const rimraf = pify(require('rimraf'))
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const selectorRegex = /\n[ \t\n]*([0-9\w\- \t\n.:#,]+?)[ \t\n]*{/g
const styleRegex = /<style>[\s\S]+?<\/style>/
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async function main () {
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if (process.argv.includes('--reverse')) { // reverse the operation we just did
let tmpComponents = await glob('./routes/**/.tmp-*.html')
for (let filename of tmpComponents) {
let text = await readFile(filename, 'utf8')
await rimraf(filename)
let originalFilename = path.join(path.dirname(filename), path.basename(filename).substring(5))
await writeFile(originalFilename, text, 'utf8')
}
} else { // read all files, copy to tmp files, rewrite files to include global CSS everywhere
let components = await glob('./routes/**/*.html')
for (let filename of components) {
let text = await readFile(filename, 'utf8')
let newText = text.replace(styleRegex, style => {
return style.replace(selectorRegex, selectorMatch => {
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return selectorMatch.replace(/\S[^{]+/, selector => `:global(${selector})`)
})
})
let newFilename = path.join(path.dirname(filename), '.tmp-' + path.basename(filename))
await writeFile(newFilename, text, 'utf8')
await writeFile(filename, newText, 'utf8')
}
}
}
Promise.resolve().then(main).catch(err => {
console.error(err)
process.exit(1)
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})