wehub-resource-sync
109 lines
4.4 KiB
JavaScript
109 lines
4.4 KiB
JavaScript
import { readFile, writeFile } from 'node:fs/promises'
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import path from 'node:path'
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import { createRequire } from 'node:module'
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import * as esbuild from 'esbuild'
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const require = createRequire(import.meta.url)
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const scriptDir = import.meta.dirname
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const mobileRoot = path.resolve(scriptDir, '..')
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const outputPath = path.join(mobileRoot, 'src', 'terminal', 'terminal-webview-engine.generated.ts')
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const target = 'chrome74'
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const packages = ['@xterm/xterm', '@xterm/addon-unicode11', '@xterm/addon-webgl']
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async function readPackageVersion(packageName) {
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// Why: a package.json module specifier must use '/' — path.join emits '\' on
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// Windows, yielding an unresolvable bare specifier that fails postinstall there.
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const packageJsonPath = require.resolve(`${packageName}/package.json`)
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const packageJson = JSON.parse(await readFile(packageJsonPath, 'utf8'))
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return `${packageName}@${packageJson.version}`
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}
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function htmlText(value, closingTag) {
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return value.replace(new RegExp(`</${closingTag}`, 'gi'), `<\\/${closingTag}`)
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}
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async function buildEngineJs() {
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const result = await esbuild.build({
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stdin: {
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contents: `
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import { Terminal } from '@xterm/xterm'
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import { Unicode11Addon } from '@xterm/addon-unicode11'
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import { WebglAddon } from '@xterm/addon-webgl'
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// Why: xterm reaches for these runtime APIs on the terminal-bringup path,
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// and esbuild lowers syntax but not runtime APIs. Guarded shims let the
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// chrome74-syntax bundle actually run on old WebViews (the #7030 goal)
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// instead of throwing at construction and only surfacing the error overlay.
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// WeakRef (Chrome 84+): lazily constructed in window-tracking paths.
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// Strong retention is fine for a single-document terminal WebView.
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if (typeof window.WeakRef === 'undefined') {
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window.WeakRef = function WeakRefShim(target) { this.__target = target }
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window.WeakRef.prototype.deref = function () { return this.__target }
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}
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// structuredClone (Chrome 98+): xterm clones its plain-data DEC-mode default
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// objects at Terminal construction; a JSON round-trip clones those correctly
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// (any undefined-valued keys drop, but every reader treats absent == undefined).
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if (typeof window.structuredClone === 'undefined') {
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window.structuredClone = function (value) { return JSON.parse(JSON.stringify(value)) }
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}
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// Element.prototype.replaceChildren (Chrome 86+): used on the row/selection
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// render path; polyfill via remove-all + append (Chrome 54+, under the floor).
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if (typeof Element !== 'undefined' && !Element.prototype.replaceChildren) {
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Element.prototype.replaceChildren = function () {
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while (this.firstChild) this.removeChild(this.firstChild)
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this.append.apply(this, arguments)
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}
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}
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window.Terminal = Terminal
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window.Unicode11Addon = { Unicode11Addon }
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window.WebglAddon = { WebglAddon }
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`,
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resolveDir: mobileRoot,
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sourcefile: 'terminal-webview-engine-entry.js'
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},
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bundle: true,
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format: 'iife',
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minify: true,
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platform: 'browser',
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target,
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legalComments: 'none',
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write: false,
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logLevel: 'silent'
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})
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return result.outputFiles[0].text
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}
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async function main() {
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const [engineJs, rawEngineCss, ...versions] = await Promise.all([
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buildEngineJs(),
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readFile(require.resolve('@xterm/xterm/css/xterm.css'), 'utf8'),
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...packages.map(readPackageVersion)
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])
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// Why: the no-external-URL regression gate bans http(s):// anywhere in the
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// terminal document. These xmlns URIs live inside data: URLs (never fetched);
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// percent-encoding the scheme colon satisfies the gate and URI-decodes back
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// before the SVG is parsed.
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const engineCss = rawEngineCss
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.replace(/\/\*[\s\S]*?\*\//g, '')
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.replace(/http:\/\/www\.w3\.org\/2000\/svg/g, 'http%3A//www.w3.org/2000/svg')
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const source = [
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'// Generated by scripts/build-terminal-webview-engine.mjs.',
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`// Packages: ${versions.join(', ')}.`,
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`// Target: ${target}. Do not edit by hand; regenerate via pnpm postinstall.`,
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`export const XTERM_ENGINE_JS = ${JSON.stringify(htmlText(engineJs, 'script'))}`,
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`export const XTERM_ENGINE_CSS = ${JSON.stringify(htmlText(engineCss, 'style'))}`,
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''
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].join('\n')
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await writeFile(outputPath, source)
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}
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await main()
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