How to install an executable in yarn workspace that is specified in a package inside of it?

Question

Following folder structure and files are given:

.
├── package.json
└── scripts
    ├── hello-word.js
    └── package.json

// package.json
{
  "name": "yarn-bin",
  "version": "1.0.0",
  "private": true,
  "license": "ISC",
  "workspaces": [
    "scripts"
  ]
}

// scripts/package.json
{
  "name": "@yarn-bin/scripts",
  "version": "1.0.0",
  "license": "ISC",
  "bin": {
    "hello-world": "./hello-world.js"
  }
}

// scripts/hello-world.js
#!/usr/bin/env -S npx node

console.log("Hello World")

This is a very simple yarn workspace setup where an executable is specified in a workspace package ("bin" in scripts/package.json). Executing ./hello-world.js works just fine (with prior chmod +x hello-world.js).

Question

Is it possible to install this executable in the workspace itself?

(To break it down: I would like to execute the script from anywhere in the workspace e.g. with npx hello-world)

Answer 1

Like I said in the comments what you got here is almost complete. You did have a typo in your file name but I assume that's a typo that happened while you copied this over to SO. I did change the hash bang to make sure you run this via node.

You cannot run this via npx as npx will go online and look through the registry.

.
├── package.json
└── scripts
    ├── hello-world.js # not "hello-word.js"
    └── package.json

Root package.json:

{
  "name": "yarn-bin",
  "version": "1.0.0",
  "private": true,
  "license": "ISC",
  "scripts": {
    "hello": "yarn hello-world"
  },
  "workspaces": [
    "scripts"
  ]
}

scripts/package.json

{
  "name": "@yarn-bin/scripts",
  "version": "1.0.0",
  "license": "ISC",
  "bin": {
    "hello-world": "./hello-world.js"
  }
}

And script/hello-world.js

#!/usr/bin/env node

console.log("Hello World")

With that setup running yarn hello in the root folder will yield:

$ yarn hello
yarn run v1.22.10
$ yarn hello-world
$ /path/to/folder/node_modules/.bin/hello-world
Hello World
✨  Done in 0.25s.

While I added an npm script into the root package.json you can also execute bins via just running yarn hello-world anywhere from within your project.