feat: actually link expo and nx

tools/scripts/eas-build-pre-install.mjs

@@ -0,0 +1,33 @@
+/*
+ * This script is used to patch the '@nx/expo' package to work with EAS Build.
+ * It is run as the eas-build-pre-install script in the 'package.json' of expo app.
+ * It is executed as 'node tools/scripts/eas-build-pre-install.mjs <workspace root> <project root>'
+ * It will copy the dependencies and devDependencies from the workspace package.json to project's package.json.
+ * This is needed because EAS Build does the install in project's directory and not workspace's directory.
+ */
+import { readFileSync, writeFileSync } from 'fs';
+import { join } from 'path';
+
+const [workspaceRoot, projectRoot] = process.argv.slice(2);
+if (!workspaceRoot) {
+  throw new Error('Missing workspace root');
+}
+if (!projectRoot) {
+  throw new Error('Missing project root');
+}
+try {
+  const workspacePackage = JSON.parse(
+    readFileSync(join(workspaceRoot, 'package.json')).toString(),
+  );
+  const projectPackage = JSON.parse(
+    readFileSync(join(projectRoot, 'package.json')).toString(),
+  );
+  projectPackage.dependencies = workspacePackage.dependencies;
+  projectPackage.devDependencies = workspacePackage.devDependencies;
+  writeFileSync(
+    join(projectRoot, 'package.json'),
+    JSON.stringify(projectPackage, null, 2),
+  );
+} catch (e) {
+  console.error('Error reading package.json file', e);
+}