Functions predeploy script exits silently if it contains an = sign

[valeriangalliat]

[REQUIRED] Environment info

firebase-tools: 11.24.1

Platform: macOS

[REQUIRED] Test case

In firebase.json:

{
  "functions": {
    "predeploy": [
      "echo a=b && echo hello"
    ]
}

[REQUIRED] Steps to reproduce

firebase deploy --only functions

[REQUIRED] Expected behavior

Before deploying, it echoes a=b then hello on the next line.

[REQUIRED] Actual behavior

i  deploying functions
Running command: echo a=b && echo hello
✔  functions: Finished running predeploy script.

---

Logging translatedCommand here gives the following:

"/path/to/node" "/path/to/node_modules/cross-env/dist/bin/cross-env-shell.js" "echo a=b && echo hello"

Which brings us to npx cross-env-shell "echo a=b && echo hello" not running the command as expected.

Turns out this is tracked in kentcdodds/cross-env#246 but sadly cross-env is no more maintained and has been archived, which means this won't be fixed there.

It seems that if we want Firebase to not silently break when a predeploy command includes an = sign, we need to use something else than cross-env to run the script.

[taeold]

Thanks for raising the issue @valeriangalliat!

Going to mark this as duplicate of #5339.

We also don't have too much resource at hand to address this issue atm. It looks like more users are getting tripped up with the limitation - let me see if we can at least output a useful error message...