Function getPackageResolution

src/getPackageResolution.ts:11–123

({
  packageDetails,
  packageManager,
  appPath,
}: {
  packageDetails: PackageDetails
  packageManager: PackageManager
  appPath: string
})

import { coerceSemVer } from "./coerceSemVer"

export function getPackageResolution({
  packageDetails,
  packageManager,
  appPath,
}: {
  packageDetails: PackageDetails
  packageManager: PackageManager
  appPath: string
}) {
  if (packageManager === "yarn") {
    let lockFilePath = "yarn.lock"
    if (!existsSync(lockFilePath)) {
      const workspaceRoot = findWorkspaceRoot()
      if (!workspaceRoot) {
        throw new Error("Can't find yarn.lock file")
      }
      lockFilePath = join(workspaceRoot, "yarn.lock")
    }
    if (!existsSync(lockFilePath)) {
      throw new Error("Can't find yarn.lock file")
    }
    const lockFileString = readFileSync(lockFilePath).toString()
    let appLockFile
    if (lockFileString.includes("yarn lockfile v1")) {
      const parsedYarnLockFile = parseYarnLockFile(lockFileString)
      if (parsedYarnLockFile.type !== "success") {
        throw new Error("Could not parse yarn v1 lock file")
      } else {
        appLockFile = parsedYarnLockFile.object
      }
    } else {
      try {
        appLockFile = yaml.parse(lockFileString)
      } catch (e) {
        console.log(e)
        throw new Error("Could not parse yarn v2 lock file")
      }
    }

    const installedVersion = getPackageVersion(
      join(resolve(appPath, packageDetails.path), "package.json"),
    )

    const entries = Object.entries(appLockFile).filter(
      ([k, v]) =>
        k.startsWith(packageDetails.name + "@") &&
        // @ts-ignore
        coerceSemVer(v.version) === coerceSemVer(installedVersion),
    )

    const resolutions = entries.map(([_, v]) => {
      // @ts-ignore
      return v.resolved
    })

    if (resolutions.length === 0) {
      throw new Error(
        `\`${packageDetails.pathSpecifier}\`'s installed version is ${installedVersion} but a lockfile entry for it couldn't be found. Your lockfile is likely to be corrupt or you forgot to reinstall your packages.`,