Trouble running "yarn run" on scripts object in package.json

Question

I'm having trouble using the run command provided by yarn, Facebook's package manager for JavaScript.

Currently in my package.json file I have the following for my scripts object.

"scripts": {
  "lint": "./node_modules/.bin/eslint --ignore-pattern dist ."
}

When I run the following command, it works as expected, npm run lint. However, when I run the script from yarn with yarn run lint I receive the following error.

Petesta :: λ -> ~/Git/yarn yarn run lint
yarn run v0.15.1
$ "./node_modules/.bin/eslint --ignore-pattern dist ."
sh: ./node_modules/.bin/eslint --ignore-pattern dist .: No such file or directory
error Command failed with exit code 127.
info Visit http://yarnpkg.com/en/docs/cli/run for documentation about this command.

The ./node_modules/.bin directory is on my $PATH and I did notice that if you have an executable like date or pwd then yarn run some_script_on_date will work as expected.

One way to get this to work is to create a separate shell file containing the command you're trying to execute. Let's call it ./scripts/lint.sh.

#!/bin/bash

./node_modules/.bin/eslint --ignore-pattern dist .

And then run this command on the file chmod +x ./scripts/lint.sh

Now in your scripts object add the following line.

"new_lint": "./scripts/lint.sh"

And now yarn run new_lint will run as expected.

Am I missing something or is this how calling scripts in yarn needs to be done? I would like for to run the command like with npm.

Answer 1

I found an issue which I believe is related: https://github.com/yarnpkg/yarn/pull/809.

yarn did not understand spaces in npm scripts. I guess this will be fixed in next release. I can reproduce the issue on my computer (using latest yarn: 0.15.1).

By the way, you do not have to include ./node_modules/.bin in your npm scripts. Both npm and yarn will look inside that folder by default, as explained here: https://docs.npmjs.com/cli/run-script

So your script can be only: "lint": "eslint --ignore-pattern dist ."