| import { readFileSync } from "node:fs"; | |
| import { gzipSync } from "node:zlib"; | |
| import path from "node:path"; | |
| /** Facts about the engine that the site states out loud. They are measured from | |
| * public/dssl/ when the page is built, so the version badge and the size claim | |
| * cannot drift away from the code the way the hardcoded ones did. */ | |
| export interface EngineInfo { | |
| version: string; | |
| /** whole engine, minified: no. Plain source, as served. */ | |
| rawKb: number; | |
| /** the same files, gzipped, which is what a browser actually downloads */ | |
| gzKb: number; | |
| } | |
| const FILES = ["boot", "index", "engine", "parser", "resolver", "static", "utils"]; | |
| export function readEngineInfo(): EngineInfo { | |
| const dir = path.join(process.cwd(), "public", "dssl"); | |
| let version = "0.0.0"; | |
| let raw = 0; | |
| let gz = 0; | |
| try { | |
| const parts = FILES.map((f) => readFileSync(path.join(dir, `${f}.js`))); | |
| const m = /VERSION\s*=\s*'([^']+)'/.exec(readFileSync(path.join(dir, "index.js"), "utf8")); | |
| if (m) version = m[1]; | |
| raw = parts.reduce((n, b) => n + b.length, 0); | |
| gz = gzipSync(Buffer.concat(parts), { level: 9 }).length; | |
| } catch { | |
| // files missing at build time: say nothing wrong rather than something invented | |
| } | |
| return { version, rawKb: Math.round(raw / 1000), gzKb: Math.round(gz / 1000) }; | |
| } | |