Why is `eas` ignoring my `package.json` when building my project? Specifically, the `bundleIdentifier` is not being found

Question

When running eas build --platform ios from Expo, I get the following error your project must have a bundleidentifier set in the expo config (app.json or app.config.js)., but I do have a bundleIdentifier set in app.json, under expo.ios.bundleIdentifier.

Answer 1

This guide was helpful in debugging.

In my case, it turned out my app.json file was in my .gitignore (because it's code genned from other files in my project so I don't want it committed), and eas doesn't upload files that are .gitignored.

I therefore solved it by introducing a .easignore in the root of my directory that did not exclude app.json.