From 02e1f92d7d5bf4d510eeef1372f5fc898027ef8f Mon Sep 17 00:00:00 2001
From: Marnelram <89900105+marnelram@users.noreply.github.com>
Date: Sun, 10 May 2026 19:08:38 -0700
Subject: [PATCH] fix(constants): inline LIB_VERSION via codegen to fix
 compiled output
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Source `src/constants/resourceFetcher.ts` reads the version with
`require('../../package.json')`. That path is correct from
`src/constants/` (two-up = package root), but `react-native-builder-bob`'s
`module` target emits the file at `lib/module/constants/` — one level
deeper — and the babel transform leaves the relative `require` literal
unchanged. From the compiled location, `../../package.json` resolves to
`lib/package.json`, which does not exist. Any bundler that resolves
through `"main"` / `"module"` (web bundlers, Node) crashes with
`Unable to resolve module ../../package.json from
node_modules/react-native-executorch/lib/module/constants/resourceFetcher.js`.
Only Metro for iOS/Android survives, because it honors the
`"react-native": "src/index"` field and reads the source file directly.

Fix by generating the version into a committed source file before
build, so the compiled output never needs a runtime JSON require:

- New `scripts/sync-version.cjs` reads `package.json#version` and writes
  `src/constants/libVersion.ts`.
- `src/constants/resourceFetcher.ts` re-exports `LIB_VERSION` from the
  generated file.
- `scripts.prepare` runs `sync-version.cjs` before `bob build`.
- `scripts.version` runs it on `npm version <bump>` so the committed
  `libVersion.ts` stays in sync with `package.json#version`.

Verified by running `yarn workspace react-native-executorch run prepare`
and confirming `lib/module/constants/resourceFetcher.js` now has
`export { LIB_VERSION } from './libVersion'` and the new
`lib/module/constants/libVersion.js` ships the inlined constant.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
---
 packages/react-native-executorch/package.json |  3 ++-
 .../scripts/sync-version.cjs                  | 24 +++++++++++++++++++
 .../src/constants/libVersion.ts               |  3 +++
 .../src/constants/resourceFetcher.ts          |  2 +-
 4 files changed, 30 insertions(+), 2 deletions(-)
 create mode 100644 packages/react-native-executorch/scripts/sync-version.cjs
 create mode 100644 packages/react-native-executorch/src/constants/libVersion.ts

diff --git a/packages/react-native-executorch/package.json b/packages/react-native-executorch/package.json
index ac32b09d5f..ee1dd01197 100644
--- a/packages/react-native-executorch/package.json
+++ b/packages/react-native-executorch/package.json
@@ -37,7 +37,8 @@
     "typecheck": "tsc --noEmit",
     "lint": "eslint \"**/*.{js,ts,tsx}\"",
     "clean": "del-cli android/build example/android/build example/android/app/build example/ios/build lib",
-    "prepare": "bob build",
+    "prepare": "node scripts/sync-version.cjs && bob build",
+    "version": "node scripts/sync-version.cjs && git add src/constants/libVersion.ts",
     "prepack": "cp ../../README.md ./README.md",
     "postpack": "rm ./README.md"
   },
diff --git a/packages/react-native-executorch/scripts/sync-version.cjs b/packages/react-native-executorch/scripts/sync-version.cjs
new file mode 100644
index 0000000000..a955c3da45
--- /dev/null
+++ b/packages/react-native-executorch/scripts/sync-version.cjs
@@ -0,0 +1,24 @@
+#!/usr/bin/env node
+// Reads this package's package.json#version and writes it into
+// src/constants/libVersion.ts as a literal export. We do this so the
+// compiled output (lib/module/constants/libVersion.js) does not need
+// a runtime require('../../package.json') — that path is correct from
+// src/constants/ but wrong from lib/module/constants/ after bob's output
+// nesting, and breaks any consumer that resolves through the "main"/
+// "module" fields instead of the "react-native" field (e.g. web/Node).
+
+const { readFileSync, writeFileSync } = require('node:fs');
+const { resolve } = require('node:path');
+
+const pkgPath = resolve(__dirname, '..', 'package.json');
+const outPath = resolve(__dirname, '..', 'src', 'constants', 'libVersion.ts');
+
+const { version } = JSON.parse(readFileSync(pkgPath, 'utf8'));
+
+const body =
+  '// AUTO-GENERATED by scripts/sync-version.cjs — do not edit by hand.\n' +
+  '// Source of truth: package.json#version.\n' +
+  `export const LIB_VERSION: string = '${version}';\n`;
+
+writeFileSync(outPath, body, 'utf8');
+console.log(`[sync-version] wrote ${outPath} (LIB_VERSION=${version})`);
diff --git a/packages/react-native-executorch/src/constants/libVersion.ts b/packages/react-native-executorch/src/constants/libVersion.ts
new file mode 100644
index 0000000000..d7ae51c1f9
--- /dev/null
+++ b/packages/react-native-executorch/src/constants/libVersion.ts
@@ -0,0 +1,3 @@
+// AUTO-GENERATED by scripts/sync-version.cjs — do not edit by hand.
+// Source of truth: package.json#version.
+export const LIB_VERSION: string = '0.9.0';
diff --git a/packages/react-native-executorch/src/constants/resourceFetcher.ts b/packages/react-native-executorch/src/constants/resourceFetcher.ts
index ae6c5f1a3b..f825584473 100644
--- a/packages/react-native-executorch/src/constants/resourceFetcher.ts
+++ b/packages/react-native-executorch/src/constants/resourceFetcher.ts
@@ -1,4 +1,4 @@
 export const DOWNLOAD_EVENT_ENDPOINT =
   'https://ai.swmansion.com/telemetry/downloads/api/downloads';
 
-export const LIB_VERSION: string = require('../../package.json').version;
+export { LIB_VERSION } from './libVersion';