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https://github.com/desktop/desktop
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134 lines
3.6 KiB
TypeScript
134 lines
3.6 KiB
TypeScript
/* generate-octicons
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*
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* Utility script for generating a strongly typed representation of all
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* octicons distributed by the octicons NPM package. Enumerates the icons
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* and generates the TypeScript class containing just what Desktop needs.
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*/
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import * as fs from 'fs'
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import * as Path from 'path'
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import * as cp from 'child_process'
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import { check } from 'reserved-words'
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import xml2js from 'xml2js'
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import toCamelCase from 'to-camel-case'
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interface IXML2JSNode {
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path: {
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$: {
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d: string
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'fill-rule'?: string
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}
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}
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}
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interface IOcticonData {
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readonly jsFriendlyName: string
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readonly pathData: string
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readonly width: string
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readonly height: string
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readonly fillRule?: string
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}
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const viewBoxRe = /0 0 (\d+) (\d+)/
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function readXml(xml: string): Promise<IXML2JSNode> {
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return new Promise((resolve, reject) => {
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xml2js.parseString(xml, function (err, result: IXML2JSNode) {
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if (err) {
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reject(err)
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} else {
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resolve(result)
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}
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})
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})
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}
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function getJsFriendlyName(name: string) {
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const sanitizedName = toCamelCase(name)
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return check(sanitizedName, 'es6', true) ? sanitizedName + '_' : sanitizedName
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}
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async function generateIconData(): Promise<ReadonlyArray<IOcticonData>> {
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const octicons = require('@primer/octicons')
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const results = new Array<IOcticonData>()
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for (const name of Object.keys(octicons).sort()) {
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const octicon = octicons[name]
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if (octicon.heights.length === 0) {
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throw new Error(`Unexpected empty sizes array for ${octicon.symbol}`)
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}
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// Try to get the 16px version of the SVG data if it exists,
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// if it doesn't just fallback to the version that is defined.
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const octiconData =
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octicon.heights['16'] ?? octicon.heights[Object.keys(octicon.heights)[0]]
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const viewBox = octiconData.options.viewBox
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const viewBoxMatch = viewBoxRe.exec(viewBox)
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if (!viewBoxMatch) {
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throw new Error(
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`Unexpected viewBox format for ${octicon.symbol} - '${viewBox}'`
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)
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}
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const [, width, height] = viewBoxMatch
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const result = await readXml(octiconData.path)
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const pathData = result.path.$.d
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const jsFriendlyName = getJsFriendlyName(octicon.symbol)
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const fillRule = result.path.$['fill-rule']
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results.push({
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jsFriendlyName,
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width,
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height,
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pathData,
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fillRule,
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})
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}
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return results
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}
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generateIconData().then(result => {
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console.log(`Writing ${result.length} octicons...`)
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const out = fs.createWriteStream(
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Path.resolve(__dirname, '../app/src/ui/octicons/octicons.generated.ts'),
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{
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encoding: 'utf-8',
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}
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)
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out.write('/*\n')
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out.write(
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' * This file is automatically generated by the generate-octicons tool.\n'
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)
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out.write(' * Manually changing this file will only lead to sadness.\n')
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out.write(' */\n\n')
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out.write(
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"export type OcticonSymbolType = {readonly w: number, readonly h: number, readonly d: string, readonly fr?: React.SVGAttributes<SVGElement>['fillRule']}\n\n"
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)
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result.forEach(function (symbol) {
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const { jsFriendlyName, pathData, width, height, fillRule } = symbol
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out.write(
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`export const ${jsFriendlyName}: OcticonSymbolType = {w: ${width}, h: ${height}, d: '${pathData}', fr: ${
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fillRule ? `'${fillRule}'` : 'undefined'
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}}\n\n`
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)
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})
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out.end()
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console.log('Ensuring generated file is formatted correctly...')
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const root = Path.dirname(__dirname)
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const yarnExecutable = process.platform === 'win32' ? 'yarn.cmd' : 'yarn'
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return cp.spawn(yarnExecutable, ['lint:fix'], { cwd: root, stdio: 'inherit' })
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})
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