rsnext/scripts/update-google-fonts.js

104 lines
2.8 KiB
JavaScript
Executable file

#!/usr/bin/env node
const fs = require('fs/promises')
const path = require('path')
const fetch = require('node-fetch')
;(async () => {
const { familyMetadataList } = await fetch(
'https://fonts.google.com/metadata/fonts'
).then((r) => r.json())
let fontFunctions = `/**
* This is an autogenerated file by scripts/update-google-fonts.js
*/
import type { CssVariable, NextFont, NextFontWithVariable, Display } from '../types'
`
const fontData = {}
const ignoredSubsets = [
'menu',
'japanese',
'korean',
'chinese-simplified',
'chinese-hongkong',
'chinese-traditional',
]
for (let { family, fonts, axes, subsets } of familyMetadataList) {
subsets = subsets.filter((subset) => !ignoredSubsets.includes(subset))
const hasPreloadableSubsets = subsets.length > 0
const weights = new Set()
const styles = new Set()
for (const variant of Object.keys(fonts)) {
if (variant.endsWith('i')) {
styles.add('italic')
weights.add(variant.slice(0, -1))
continue
} else {
styles.add('normal')
weights.add(variant)
}
}
const hasVariableFont = axes.length > 0
let optionalAxes
if (hasVariableFont) {
weights.add('variable')
const nonWeightAxes = axes.filter(({ tag }) => tag !== 'wght')
if (nonWeightAxes.length > 0) {
optionalAxes = nonWeightAxes
}
}
fontData[family] = {
weights: [...weights],
styles: [...styles],
axes: hasVariableFont ? axes : undefined,
subsets,
}
const optionalIfVariableFont = hasVariableFont ? '?' : ''
const formatUnion = (values) =>
values.map((value) => `"${value}"`).join('|')
const weightTypes = [...weights]
const styleTypes = [...styles]
fontFunctions += `export declare function ${family.replaceAll(
' ',
'_'
)}<T extends CssVariable | undefined = undefined>(options${optionalIfVariableFont}: {
weight${optionalIfVariableFont}:${formatUnion(
weightTypes
)} | Array<${formatUnion(
weightTypes.filter((weight) => weight !== 'variable')
)}>
style?: ${formatUnion(styleTypes)} | Array<${formatUnion(styleTypes)}>
display?:Display
variable?: T
${hasPreloadableSubsets ? 'preload?:boolean' : ''}
fallback?: string[]
adjustFontFallback?: boolean
${hasPreloadableSubsets ? `subsets?: Array<${formatUnion(subsets)}>` : ''}
${
optionalAxes
? `axes?:(${formatUnion(optionalAxes.map(({ tag }) => tag))})[]`
: ''
}
}): T extends undefined ? NextFont : NextFontWithVariable
`
}
await Promise.all([
fs.writeFile(
path.join(__dirname, '../packages/font/src/google/index.ts'),
fontFunctions
),
fs.writeFile(
path.join(__dirname, '../packages/font/src/google/font-data.json'),
JSON.stringify(fontData, null, 2)
),
])
})()