feat(expo): Add withSentryExpoSerializers for easy metro configuration

[krystofwoldrich]

📢 Type of change

• New feature

📜 Description

This PR adds withSentryExpoSerializers which overrides an existing custom serializer in the config and replaces it with the combination of Expo and Sentry serializers.

💡 Motivation and Context

Expo projects by default include Expo serializers and replacing them with Sentry serializers might lose some functions. withSentryExpoSerializers simplifies otherwise verbose setup like this:

Before

const { getDefaultConfig } = require('expo/metro-config');
const { mergeConfig } = require('metro');
const { createSentryMetroSerializer } = require("@sentry/react-native/metro");
const { withExpoSerializers } = require('@expo/metro-config/build/serializer/withExpoSerializers');

const config = getDefaultConfig(__dirname);

const sentryConfig = {
  serializer: {
    customSerializer: createSentryMetroSerializer()
  }
};

const finalConfig = mergeConfig(config, sentryConfig);

module.exports = withExpoSerializers(finalConfig);

After

const { getDefaultConfig } = require('expo/metro-config');
const { withSentryExpoSerializers } = require("@sentry/react-native/metro");

const config = getDefaultConfig(__dirname);
module.exports = withSentryExpoSerializers(config);

💚 How did you test it?

sample app

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled
• All tests passing
• No breaking changes

🔮 Next steps

[github-actions]

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Generated by 🚫 dangerJS against c6b13be

[github-actions]

Android (legacy) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	437.00 ms	469.08 ms	32.08 ms
Size	17.73 MiB	19.84 MiB	2.11 MiB

[github-actions]

Android (new) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	375.84 ms	412.92 ms	37.08 ms
Size	7.15 MiB	8.11 MiB	988.28 KiB

[lucas-zimerman]

LGTM!

[github-actions]

iOS (legacy) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1275.16 ms	1282.52 ms	7.36 ms
Size	2.36 MiB	2.88 MiB	524.09 KiB