Use pretty colors in the output?

[JoshuaKGoldberg]

https://github.com/chalk/chalk can do it for you, though if you want just an angry red & bold color it's easy to do inline.

I'd be willing to send a PR too!

[JoshuaKGoldberg]

In a little more detail: this is what I get from putting it in a nested package.json script:

    // ...
    "setup": "npm run setup:engines && npm run setup:script",
    "setup:engines": "check-node-version --node 9",
    "setup:script": "node scripts/setup.js",
    // ...

C:\Code\MyRepo (bugfix/hard-package-versions)
λ npm run setup

> [email protected] setup C:\Code\MyRepo
> npm run setup:engines && npm run setup:script

npm WARN invalid config loglevel="notice"

> [email protected] setup:engines C:\Code\MyRepo
> check-node-version --node 9

node: 8.8.1
Error: Wanted node version 9 (>=9.0.0 <10.0.0)
To install node, run `nvm install 9` or see https://nodejs.org/

npm ERR! Windows_NT 10.0.14393
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Code\\MyRepo\\node_modules\\npm\\bin\\npm-cli.js" "run" "setup:engines"
npm ERR! node v8.8.1
npm ERR! npm  v3.10.10
npm ERR! code ELIFECYCLE
npm ERR! [email protected] setup:engines: `check-node-version --node 9`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] setup:engines script 'check-node-version --node 9'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the electric-boogaloo package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     check-node-version --node 9
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs electric-boogaloo
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls electric-boogaloo
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     C:\Code\MyRepo\npm-debug.log
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] setup: `npm run setup:engines && npm run setup:script`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] setup script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\jogol\AppData\Roaming\npm-cache\_logs\2017-11-29T00_29_33_449Z-debug.log

Someone with a very old Node version might not see the actual error. In fact, that happened earlier today with a teammate of mine.

[parshap]

Yes, this would be great and I would greatly appreciate a PR for this! @paulmelnikow suggested this in #15 too. Using chalk sounds good to me, especially since it checks for a tty before enabling colors.

[paulmelnikow]

Woohoo!