In this article, we review Concurrently. You will learn:
What is Concurrently?
Concurrently in n8n codebase.
What is Concurrently?
Run multiple commands concurrently. Like npm run watch-js & npm run watch-less but better.
The usual way to run multiple commands concurrently is npm run watch-js & npm run watch-css. That's fine but it's hard to keep on track of different outputs. Also if one process fails, others still keep running and you won't even notice the difference.
Features:
Cross platform (including Windows)
Output is easy to follow with prefixes
With --kill-others switch, all commands are killed if one dies
Learn more about concurrently.
Concurrently in n8n codebase.
I found concurrently in n8n codebase at packages/cli/package.json.
{
"name": "n8n",
"version": "2.36.0",
"description": "n8n Workflow Automation Tool",
"main": "dist/index",
"types": "dist/index.d.ts",
"scripts": {
...
"dev": "concurrently -k -n \"TypeScript,Node\" -c \"yellow.bold,cyan.bold\" \"pnpm run watch\" \"nodemon --delay 1\"",
}
}
Why concurrently? Like its explained above, concurrently provides outputs with prefixes when you have multiple scripts combined in a single script and is cross platform. I faced this issue in a project, on windows machine, where the dev script had & and as a result, it failed to run.
There are other scripts too where this concurrently is used in the same package.json file:
swift
...
"dev:worker": "concurrently -k -n \"TypeScript,Node\" -c \"yellow.bold,cyan.bold\" \"pnpm run watch\" \"nodemon worker\"",
"dev:webhook": "concurrently -k -n \"TypeScript,Node\" -c \"yellow.bold,cyan.bold\" \"pnpm run watch\" \"nodemon webhook\"",
...
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