Hidding Sentry Auth fom app.json

For anybody who wants to hide sentry auth token from app.json, you just need to make it and env variable.

I just created an bash script to inject it and changed the package.json scripts to run it before calling expo start, build, etc, and it seems to work…



#!/usr/bin/env bash

export SENTRY_AUTH_TOKEN="token"


  "scripts": {
    "start": ". ./setEnv.sh && expo start",
    "build-android": ". ./setEnv.sh && expo build:android",
... rest of the file ...

reference: Provide authToken from an external source for security reasons · Issue #29 · expo/sentry-expo · GitHub

1 Like

Thanks for sharing this @naripok!

Hey guys, I have a question…

Although the method described above seems to work for injecting the sentry token into app.json (sentry works fine, does it works even without the token?), when I try to access any env variables via process.env.VARIABLE_NAME from inside my app, I get undefined value…

Which method do you guys recommend for injecting env variables into an expo app, e.g. for alternating between dev and prod configs?

Thanks in advance!

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