Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Jest crashes on systems without find

See original GitHub issue

🐛 Bug Report

Jest crashes on systems without find. It would be automatically detected if the utility was available and handled this gracefully.

An alternative would be to allow forceNodeFilesystemAPI parameter to be passed from https://github.com/facebook/jest/blob/9ac2dcd55c0204960285498c590c1aa7860e6aa8/packages/jest-core/src/cli/index.ts#L123 to https://github.com/facebook/jest/blob/89c151b69f81baba49caeceec19f07b4bc2680cc/packages/jest-runtime/src/index.ts#L242 which would force it to not use the find utility.

To Reproduce

Steps to reproduce the behavior:

Run jest on a system without find (in our case, AWS lambda node12.x runtime)

Docker image for lambda like runtime environment

docker run -it --rm -v <path_to_lambda>:/var/task:ro,delegated --entrypoint /bin/bash lambci/lambda:nodejs12.x

Expected behavior

Jest works without find utility.

Link to repl or repo (highly encouraged)

From node, try to run tests using jest-cli package

const jestCli = require("jest-cli");
jestCli.runCLI({ }, '.');

Stacktrace Jest crashes with uncaught exception trying to invoke find utility https://github.com/facebook/jest/blob/ee2bea16a9f401581a884d9faa0951b552a86fe4/packages/jest-haste-map/src/crawlers/node.ts#L102

Thrown:
Error: spawn find ENOENT
    at Process.ChildProcess._handle.onexit (internal/child_process.js:264:19)
    at onErrorNT (internal/child_process.js:456:16)
    at processTicksAndRejections (internal/process/task_queues.js:80:21) {
  errno: 'ENOENT',
  code: 'ENOENT',
  syscall: 'spawn find',
  path: 'find',
  spawnargs: [
    '/var/task', '-type',
    'f',         '(',
    '-iname',    '*.snap',
    '-o',        '-iname',
    '*.js',      '-o',
    '-iname',    '*.json',
    '-o',        '-iname',
    '*.jsx',     '-o',
    '-iname',    '*.node',
    ')'
  ],