pinafore/bin/build-inline-script.js

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import crypto from 'crypto'
import fs from 'fs'
import { promisify } from 'util'
import path from 'path'
import { rollup } from 'rollup'
import { terser } from 'rollup-plugin-terser'
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import replace from '@rollup/plugin-replace'
import fromPairs from 'lodash-es/fromPairs'
import { themes } from '../src/routes/_static/themes'
import terserOptions from './terserOptions'
const writeFile = promisify(fs.writeFile)
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const themeColors = fromPairs(themes.map(_ => ([_.name, _.color])))
export async function buildInlineScript () {
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const inlineScriptPath = path.join(__dirname, '../src/inline-script/inline-script.js')
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const bundle = await rollup({
input: inlineScriptPath,
plugins: [
replace({
values: {
'process.browser': true,
'process.env.THEME_COLORS': JSON.stringify(themeColors)
},
preventAssignment: true
}),
// TODO: can't disable terser at all, it causes the CSP checksum to stop working
// because the HTML gets minified as some point so the checksums don't match.
terser({ ...terserOptions, mangle: !process.env.DEBUG })
]
})
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const { output } = await bundle.generate({
format: 'iife',
sourcemap: true
})
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const { code, map } = output[0]
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const fullCode = `${code}//# sourceMappingURL=/inline-script.js.map`
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const checksum = crypto.createHash('sha256').update(fullCode, 'utf8').digest('base64')
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await writeFile(path.resolve(__dirname, '../src/inline-script/checksum.js'),
`module.exports = ${JSON.stringify(checksum)}`, 'utf8')
await writeFile(path.resolve(__dirname, '../static/inline-script.js.map'),
map.toString(), 'utf8')
return '<script>' + fullCode + '</script>'
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}