From 3bdca14c5bf2f4533784e3584971e1936f87c49c Mon Sep 17 00:00:00 2001
From: Lukas Fritsch <111692684+Fritsch-Tech@users.noreply.github.com>
Date: Sun, 1 Oct 2023 21:09:56 +0200
Subject: [PATCH] feat: Add Expo Support for React Native Preset (#183)

#### Changes Made

This pull request introduces support for Expo in the React Native
preset. Expo projects typically utilize the `main` key in `package.json`
as their entry point, linking to `AppEntry.js`.

#### Purpose

The addition of Expo support ensures that unimported will seamlessly
integrate with Expo out of the box. This enhancement is crucial for Expo
React Native projects, providing a smoother development experience.

Please review the changes and provide any feedback or suggestions. Your
input is greatly appreciated.

Thank you!
---
 src/presets/react-native.ts | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/presets/react-native.ts b/src/presets/react-native.ts
index b0b0791..fa75147 100644
--- a/src/presets/react-native.ts
+++ b/src/presets/react-native.ts
@@ -24,6 +24,27 @@ function getEntry(target: string, rootExtensions: string[]) {
     },
   };
 }
+
+function getExpo(options, rootExtensions: string[]) {
+  const expoEntry = options.packageJson.main;
+
+  if (!expoEntry) {
+    return;
+  }
+
+  const [file] = resolveFilesSync([expoEntry], rootExtensions);
+
+  if (!file) {
+    return;
+  }
+  return {
+    file,
+    label: 'expo',
+    extend: {
+      extensions: rootExtensions,
+    },
+  };
+}
 const preset: Preset = {
   name: 'react-native',
   isMatch: ({ hasPackage }) => hasPackage('react-native'),
@@ -31,9 +52,12 @@ const preset: Preset = {
     const base = await nodePreset.getConfig(options);
     const extensions = base.extensions as string[];
 
+    const hasExpo = options.hasPackage('expo');
+
     const entry = [
       getEntry('android', extensions),
       getEntry('ios', extensions),
+      hasExpo ? getExpo(options, extensions) : undefined,
     ].filter(typedBoolean);
 
     return {