35 lines
1.2 KiB
JavaScript
35 lines
1.2 KiB
JavaScript
/**
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* pdf.js 解码 JBIG2 / JPEG2000 扫描页时会在 worker 里按 wasmUrl 取 wasm 运行时，
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* 这个目录不由打包器管理，所以每次 dev/build 前把 node_modules 里的文件同步到 public。
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*/
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import {
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copyFileSync,
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existsSync,
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mkdirSync,
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readdirSync,
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readFileSync,
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} from "node:fs";
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import { dirname, join, resolve } from "node:path";
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import { fileURLToPath } from "node:url";
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const frontend = resolve(dirname(fileURLToPath(import.meta.url)), "..");
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const from = join(frontend, "node_modules/pdfjs-dist/wasm");
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const to = join(frontend, "public/pdfjs-wasm");
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mkdirSync(to, { recursive: true });
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const files = readdirSync(from).filter((name) => !name.startsWith("LICENSE"));
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let copied = 0;
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for (const name of files) {
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const source = join(from, name);
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const dest = join(to, name);
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// 内容没变就不重写：dev server 在跑时改 public 里的同名文件会触发整页刷新并弹覆盖层
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if (existsSync(dest) && readFileSync(dest).equals(readFileSync(source))) continue;
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copyFileSync(source, dest);
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copied += 1;
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}
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console.log(
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copied
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? `[pdfjs-wasm] 已同步 ${copied}/${files.length} 个文件 -> public/pdfjs-wasm`
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: "[pdfjs-wasm] public/pdfjs-wasm 已是最新",
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);
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