Function installVersion

sources/corepackUtils.ts:208–355

(installTarget: string, locator: Locator, {spec}: {spec: PackageManagerSpec})

}

export async function installVersion(installTarget: string, locator: Locator, {spec}: {spec: PackageManagerSpec}): Promise<InstallSpec> {
  const locatorIsASupportedPackageManager = isSupportedPackageManagerLocator(locator);
  const locatorReference = locatorIsASupportedPackageManager ? semverParse(locator.reference)! : parseURLReference(locator);
  const {version, build} = locatorReference;

  const installFolder = path.join(installTarget, locator.name, version);

  try {
    const corepackFile = path.join(installFolder, `.corepack`);
    const corepackContent = await fs.promises.readFile(corepackFile, `utf8`);

    const corepackData = JSON.parse(corepackContent);

    debugUtils.log(`Reusing ${locator.name}@${locator.reference} found in ${installFolder}`);

    return {
      hash: corepackData.hash as string,
      location: installFolder,
      bin: corepackData.bin,
    };
  } catch (err) {
    if (nodeUtils.isNodeError(err) && err.code !== `ENOENT`) {
      throw err;
    }
  }

  let url: string;
  let signatures: Array<{keyid: string, sig: string}>;
  let integrity: string;
  let binPath: string | null = null;
  if (locatorIsASupportedPackageManager) {
    url = spec.url.replace(`{}`, version);
    if (process.env.COREPACK_NPM_REGISTRY) {
      const registry = getRegistryFromPackageManagerSpec(spec);
      if (registry.type === `npm`) {
        ({tarball: url, signatures, integrity} = await npmRegistryUtils.fetchTarballURLAndSignature(registry.package, version));
        if (registry.bin) {
          binPath = registry.bin;
        }
      }
      url = url.replace(
        npmRegistryUtils.DEFAULT_NPM_REGISTRY_URL,
        () => process.env.COREPACK_NPM_REGISTRY!,
      );
    }
  } else {
    url = decodeURIComponent(version);
    if (process.env.COREPACK_NPM_REGISTRY && url.startsWith(npmRegistryUtils.DEFAULT_NPM_REGISTRY_URL)) {
      url = url.replace(
        npmRegistryUtils.DEFAULT_NPM_REGISTRY_URL,
        () => process.env.COREPACK_NPM_REGISTRY!,
      );
    }
  }

  debugUtils.log(`Installing ${locator.name}@${version} from ${url}`);
  const algo = build[0] ?? `sha512`;
  const {tmpFolder, outputFile, hash: actualHash} = await download(installTarget, url, algo, binPath);