npm run poststop script on ctrl+c

Question

My package.json scripts section looks like this.

"scripts": {
  "prestart": "mongod",
  "start": "NODE_ENV=prod node server.js",
  "poststop": "mongo admin --eval 'db.shutdownServer()'",
  "predev": "mongod",
  "dev": "NODE_ENV=dev nodemon server.js"
},

I use pre- and post hooks to start mongod before starting my server. I then kill my server using ctrl+c. Unfortunately, this doesn't execute the poststop script. As a result, calling npm/yarn start/dev for the second time throws an error and aborts because mongod is already running.

Another mongod instance is already running on the /data/db directory, terminating

Can I somehow call poststop on ctrl+c?

@JoshuaPinter It’s been a while, but IIRC I made that up. Call it whatever you like. — Janosh, May 25 '20 at 04:59

Brett Y · Answer 1 · 2019-11-13T21:12:23.497

4

You need to trap the SIGINT signal and return a success exit code (0) instead

"scripts": {
  "prestart": "mongod",
  "start": "trap 'exit 0' SIGINT; NODE_ENV=prod node server.js",
  "poststop": "mongo admin --eval 'db.shutdownServer()'",
  "predev": "mongod",
  "dev": "NODE_ENV=dev nodemon server.js"
},

edited Nov 13 '19 at 21:12

answered Dec 11 '18 at 12:28

Brett Y

7,171
1
28
42

1

Shouldn't `"poststart"` here to be `"poststop"`? – demisx Nov 08 '19 at 17:27
hmm this does not seem to work for me, it would just exit and not run the post call. Any suggestions? – chitzui Jan 16 '20 at 12:33

npm run poststop script on ctrl+c

1 Answers1