From 75d5bd3e79f025303bd049da02edb0c7280b7add Mon Sep 17 00:00:00 2001
From: Dennis Falling <dennis@culpeos.com>
Date: Fri, 10 Jul 2026 23:42:16 +0100
Subject: [PATCH] Shrink release APK and fix broken release bundling
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The release JS bundle could not build at all: graphql v17 ships .mjs using
`export * as Kind from ...`, which the RN Babel preset doesn't transform. CI
only runs assembleDebug (Metro serves JS live, no bundling), so it never
surfaced — but any v* release tag would have failed. Add the
export-namespace-from Babel plugin to fix it.

Also cut the shipped APK ~68% (110 MB -> 35 MB) with no product-code changes:
ship arm64-v8a only (every target device is 64-bit ARM; the other three ABIs
are dead weight and also 4x the build time), and enable R8 + resource
shrinking on release builds.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
---
 android/app/build.gradle  | 3 ++-
 android/gradle.properties | 7 ++++++-
 babel.config.js           | 4 ++++
 3 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/android/app/build.gradle b/android/app/build.gradle
index 502190d..f602ffc 100644
--- a/android/app/build.gradle
+++ b/android/app/build.gradle
@@ -57,7 +57,7 @@ react {
 /**
  * Set this to true to Run Proguard on Release builds to minify the Java bytecode.
  */
-def enableProguardInReleaseBuilds = false
+def enableProguardInReleaseBuilds = true
 
 /**
  * The preferred build flavor of JavaScriptCore (JSC)
@@ -114,6 +114,7 @@ android {
             def hasReleaseKeystore = System.getenv('RELEASE_STORE_FILE') || project.findProperty('RELEASE_STORE_FILE')
             signingConfig hasReleaseKeystore ? signingConfigs.release : signingConfigs.debug
             minifyEnabled enableProguardInReleaseBuilds
+            shrinkResources enableProguardInReleaseBuilds
             proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
         }
     }
diff --git a/android/gradle.properties b/android/gradle.properties
index 9afe615..4e0e8da 100644
--- a/android/gradle.properties
+++ b/android/gradle.properties
@@ -25,7 +25,12 @@ android.useAndroidX=true
 # Use this property to specify which architecture you want to build.
 # You can also override it from the CLI using
 # ./gradlew <task> -PreactNativeArchitectures=x86_64
-reactNativeArchitectures=armeabi-v7a,arm64-v8a,x86,x86_64
+# Ship arm64-v8a only. Every real target device (GrapheneOS/Pixels and modern
+# stock Android) is 64-bit ARM; x86/x86_64 are emulator-only and armeabi-v7a is
+# pre-2017 32-bit. This controls both which ABIs are compiled and which ship, so
+# it also cuts build time ~4x. To run a debug build on an x86_64 emulator,
+# override per-invocation: ./gradlew ... -PreactNativeArchitectures=x86_64
+reactNativeArchitectures=arm64-v8a
 
 # Use this property to enable support to the new architecture.
 # This will allow you to use TurboModules and the Fabric render in
diff --git a/babel.config.js b/babel.config.js
index f7b3da3..5dabc66 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -1,3 +1,7 @@
 module.exports = {
   presets: ['module:@react-native/babel-preset'],
+  // graphql v17 ships .mjs using `export * as Kind from ...` (export-namespace-from).
+  // The RN preset doesn't transform this, so release bundling fails without it.
+  // Debug builds serve JS from Metro and skip bundling, so CI never hit this.
+  plugins: ['@babel/plugin-transform-export-namespace-from'],
 };