vite-plugin-checker/dist/checkers/vueTsc/prepareVueTsc.js

Vite plugin that runs TypeScript type checker on a separate process.

import { access, cp, mkdir, readFile, rm, writeFile } from "node:fs/promises";
import { createRequire } from "node:module";
import path, { dirname } from "node:path";
import { fileURLToPath } from "node:url";
import lockfile from "proper-lockfile";
const _require = createRequire(import.meta.url);
const _filename = fileURLToPath(import.meta.url);
const _dirname = dirname(_filename);
const vueTscDir = dirname(_require.resolve("vue-tsc/package.json"));
const proxyApiPath = _require.resolve(
  "@volar/typescript/lib/node/proxyCreateProgram",
  {
    paths: [vueTscDir]
  }
);
const extraSupportedExtensions = [".vue"];
const LOCK_TIMEOUT_MS = 6e4;
const STALE_TIMEOUT_MS = 3e4;
async function isFixtureValid(targetTsDir, vueTscFlagFile, currTsVersion) {
  try {
    await access(targetTsDir);
    const targetTsVersion = JSON.parse(
      await readFile(path.resolve(targetTsDir, "package.json"), "utf8")
    ).version;
    await access(vueTscFlagFile);
    const fixtureFlagContent = await readFile(vueTscFlagFile, "utf8");
    return targetTsVersion === currTsVersion && fixtureFlagContent === proxyApiPath;
  } catch {
    return false;
  }
}
async function prepareVueTsc() {
  const targetTsDir = path.resolve(_dirname, "typescript-vue-tsc");
  const vueTscFlagFile = path.resolve(targetTsDir, "vue-tsc-resolve-path");
  const currTsVersion = _require("typescript/package.json").version;
  const tsMajorVersion = Number(currTsVersion.split(".")[0]);
  if (tsMajorVersion < 5) {
    throw new Error(
      "\x1B[35m[vite-plugin-checker] Since 0.7.0, vue-tsc checkers requires TypeScript 5.0.0 or newer version.\nPlease upgrade TypeScript, or use v0.6.4 which works with vue-tsc^1 if you can't upgrade. Check the pull request https://github.com/fi3ework/vite-plugin-checker/pull/327 for detail.\x1B[39m\n"
    );
  }
  if (await isFixtureValid(targetTsDir, vueTscFlagFile, currTsVersion)) {
    return { targetTsDir };
  }
  let release;
  try {
    release = await lockfile.lock(_dirname, {
      lockfilePath: path.resolve(_dirname, ".vue-tsc-fixture.lock"),
      stale: STALE_TIMEOUT_MS,
      retries: {
        retries: Math.ceil(LOCK_TIMEOUT_MS / 1e3),
        factor: 1,
        minTimeout: 1e3,
        maxTimeout: 2e3,
        randomize: true
      }
    });
  } catch (err) {
    throw new Error(
      "[vite-plugin-checker] Failed to acquire lock for vue-tsc fixture preparation. Another process may be holding the lock.\n" + String(err)
    );
  }
  try {
    if (await isFixtureValid(targetTsDir, vueTscFlagFile, currTsVersion)) {
      return { targetTsDir };
    }
    await rm(targetTsDir, { force: true, recursive: true });
    await mkdir(targetTsDir, { recursive: true });
    const sourceTsDir = path.resolve(_require.resolve("typescript"), "../..");
    await cp(sourceTsDir, targetTsDir, { recursive: true });
    await writeFile(vueTscFlagFile, proxyApiPath);
    await overrideTscJs(
      _require.resolve(path.resolve(targetTsDir, "lib/typescript.js"))
    );
  } finally {
    await release();
  }
  return { targetTsDir };
}
async function overrideTscJs(tscJsPath) {
  const languagePluginsFile = path.resolve(_dirname, "languagePlugins.cjs");
  let tsc = await readFile(tscJsPath, "utf8");
  const extsText = extraSupportedExtensions.map((ext) => `"${ext}"`).join(", ");
  tsc = replace(
    tsc,
    /supportedTSExtensions = .*(?=;)/,
    (s) => s + `.map((group, i) => i === 0 ? group.splice(0, 0, ${extsText}) && group : group)`
  );
  tsc = replace(
    tsc,
    /supportedJSExtensions = .*(?=;)/,
    (s) => s + `.map((group, i) => i === 0 ? group.splice(0, 0, ${extsText}) && group : group)`
  );
  tsc = replace(
    tsc,
    /allSupportedExtensions = .*(?=;)/,
    (s) => s + `.map((group, i) => i === 0 ? group.splice(0, 0, ${extsText}) && group : group)`
  );
  const extsText2 = extraSupportedExtensions.map((ext) => `"${ext}"`).join(", ");
  tsc = replace(
    tsc,
    /function changeExtension\(/,
    (s) => `function changeExtension(path, newExtension) {
					return [${extsText2}].some(ext => path.endsWith(ext))
						? path + newExtension
						: _changeExtension(path, newExtension)
					}
${s.replace("changeExtension", "_changeExtension")}`
  );
  tsc = replace(
    tsc,
    /function createProgram\(.+\) {/,
    (s) => `var createProgram = require(${JSON.stringify(
      proxyApiPath
    )}).proxyCreateProgram(${[
      "new Proxy({}, { get(_target, p, _receiver) { return eval(p); } } )",
      "_createProgram",
      `require(${JSON.stringify(languagePluginsFile)}).getLanguagePlugins`
    ].join(", ")});
${s.replace("createProgram", "_createProgram")}`
  );
  function replace(_text, ...[search, replace2]) {
    const before = _text;
    const text = _text.replace(search, replace2);
    const after = text;
    if (after === before) {
      throw `Search string not found: ${JSON.stringify(search.toString())}`;
    }
    return after;
  }
  await writeFile(tscJsPath, tsc);
}
export {
  prepareVueTsc
};
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