feat: codegen in android packages by WoLewicki · Pull Request #206 · software-mansion/rnrepo

WoLewicki · 2026-01-13T12:14:45Z

📝 Description

PR adding codegen artifacts (static libs and headers) as parts of library .aar and implementing:

packing all of it to .aar
unpacking them in client project
linking them instead of building them from source by:
- removing library occurences from Android-autolinking.cmake (https://github.com/software-mansion/rnrepo/pull/206/files#diff-8d1431ccdc7a315b68ce17002287169c0463238f411af18e09163e67e34a0334R924-R938)
- adding CMakeLists.txt wrapper around the main app's one in which we manually link those libs (https://github.com/software-mansion/rnrepo/pull/206/files#diff-8d1431ccdc7a315b68ce17002287169c0463238f411af18e09163e67e34a0334R999) which is consumed here

It is done to speed up the builds by removing the necessity of building codegen each time you build an app since we believe it should be library's responsibility to provide those artifacts.

Testing

Patching

patch is successfully applied for all react-native@>=0.81.4 versions.

 PATCH COMPATIBILITY RESULTS
RN VERSION    RESULT
──────────────────────────────────
0.77.3        ✗ patch mismatch
0.78.3        ✗ patch mismatch
0.79.7        ✗ patch mismatch
0.80.0        ✗ patch mismatch
0.80.1        ✗ patch mismatch
0.80.2        ✗ patch mismatch
0.80.3        ✗ patch mismatch
0.81.0        ✓
0.81.1        ✓
0.81.4        ✓
0.81.5        ✓
0.81.6        ✓
0.82.0        ✓
0.82.1        ✓
0.83.0        ✓
0.83.1        ✓
0.83.2        ✓
0.83.4        ✓
0.84.0        ✓

…orms

Copilot

Pull request overview

This PR implements a codegen artifacts prebuilt system for Android libraries to reduce build times by eliminating the need to rebuild codegen artifacts on every app build. The system packages prebuilt static libraries and headers in .aar files and provides mechanisms to extract and link them in client projects.

Changes:

Modified build pipeline to generate both standard and codegen-enabled library versions
Implemented extraction and linking of prebuilt codegen artifacts through Gradle plugin
Temporarily disabled database status tracking and modified to use development branch for testing

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
react-native-versions.json	Removed older React Native versions from the supported list
packages/scheduler/src/scheduler.ts	Disabled build scheduling checks and database record creation; switched to development branch
packages/publisher/update-build-status.ts	Commented out build status update logic
packages/publisher/publish-library-android.ts	Added codegen classifier suffix and disabled database status updates
packages/gradle-client/rnrepo-plugin/src/main/kotlin/org/rnrepo/tools/prebuilds/PrebuildsPlugin.kt	Added codegen detection, CMake wrapper configuration, and prebuilt artifact extraction logic
packages/gradle-client/rnrepo-plugin/src/main/kotlin/org/rnrepo/tools/prebuilds/ExtractPrebuiltsTask.kt	New task to extract codegen static libraries and headers from AAR files
packages/database/src/index.ts	Added early returns to bypass database operations
packages/builder/patches/@react-native+codegen+0.81.4.patch	Changed codegen library type from OBJECT to STATIC
packages/builder/gradle_init_scripts/add-publishing.gradle	Added codegen artifact extraction, header packaging, and publishing with codegen classifier
packages/builder/build-utils.ts	Added patch file copying and application
packages/builder/build-library-android.ts	Implemented dual publishing (standard and codegen versions) with detection logic
libraries.json	Reduced library list to single entry for testing purposes
.github/workflows/publish-library-android.yml	Updated to use development secrets and checkout workflow branch

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it failed for @react-native-firebase/* packages, now it works

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Copilot reviewed 8 out of 8 changed files in this pull request and generated 3 comments.

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it was introduced in #254

react-native-safe-area-context does not produce `libreact_codegen_<>.a` resulting in error: ``` > Task :app:buildCMakeDebug[arm64-v8a] FAILED C/C++: ninja: error: '<>>AwesomeProject/android/app/build/generated/rnrepo/prebuilts/arm64-v8a/libreact_codegen_safeareacontext.a', needed by '<>AwesomeProject/android/app/build/intermediates/cxx/Debug/6z216m2n/obj/arm64-v8a/libappmodules.so', missing and no known rule to make it ```

## 📝 Description replace CMake wrapper with autolinking.json injection Instead of generating a top-level CMakeLists.txt that wrapped the app's CMake and manually scrubbed codegen entries from autolinking, prebuilt codegen integration now works by redirecting React Native's autolinking config before the native build sees it. Changes: - add-publishing.gradle now bundles a self-contained assets/cmake/CMakeLists.txt inside each AAR. The generated file creates a proper STATIC target (not IMPORTED) that links the prebuilt .a — this avoids CMake's restriction on IMPORTED targets in non-INTERFACE target_link_libraries calls used internally by ReactNative-application.cmake. - ExtractPrebuiltsTask reads the RN-generated autolinking.json, finds dependency entries whose libraryName matches a downloaded prebuilt, and rewrites their cmakeListsPath to point at the extracted CMakeLists.txt. - PrebuildsPlugin hooks into generateAutolinkingNewArchitectureFiles and swaps its input with the transformed autolinking.json, so RN's own build infrastructure picks up prebuilt cmake paths transparently. - release build type now consistently maps to relwithdebinfo artifacts in both Kotlin task and Gradle script. - npm package name passed via -PrnrepoNpmName and stored in assets/meta/npm_name.txt for improved logging on the consumer side. ## 🧪 Testing Tested on pure rn app and expo@55 with packages listed below, both apps builded and launched on emulator as expected. ``` react-native-screens 4.25.1 0.85.1 react-native-screens 4.23.0 0.83.6 react-native-worklets 0.8.3 0.85.1 react-native-worklets 0.7.4 0.83.6 react-native-safe-area-context 5.6.2 0.83.6 react-native-safe-area-context 5.8.0 0.85.1 react-native-reanimated 4.2.1 0.83.6 react-native-reanimated 4.3.1 0.85.1 react-native-gesture-handler 2.30.1 0.83.6 react-native-gesture-handler 2.31.2 0.85.1 ```

radoslawrolka · 2026-06-11T10:21:04Z

After building artifacts are the same, performed tests to check for regressions, tests from #368 are still valid.

$ shasum -a 256 ~/.m2/repository/org/rnrepo/public/react-native-safe-area-context/5.8.0/react-native-safe-area-context-5.8.0-rn0.85.1-codegen.aar
shasum -a 256 ~/Downloads/RNREPO_STASH/CODEGEN_ARTIFACTS_FOR_PATCH_TEST/react-native-safe-area-context/5.8.0/react-native-safe-area-context-5.8.0-rn0.85.1-codegen.aar
cf84238baed548915cc72a3493358aad575dc5411e70b5215596290d3601e624  ~/.m2/repository/org/rnrepo/public/react-native-safe-area-context/5.8.0/react-native-safe-area-context-5.8.0-rn0.85.1-codegen.aar
cf84238baed548915cc72a3493358aad575dc5411e70b5215596290d3601e624  ~/Downloads/RNREPO_STASH/CODEGEN_ARTIFACTS_FOR_PATCH_TEST/react-native-safe-area-context/5.8.0/react-native-safe-area-context-5.8.0-rn0.85.1-codegen.aar
---
$ shasum -a 256 ~/.m2/repository/org/rnrepo/public/react-native-screens/4.25.1/react-native-screens-4.25.1-rn0.85.1-codegen.aar
shasum -a 256 ~/Downloads/RNREPO_STASH/CODEGEN_ARTIFACTS_FOR_PATCH_TEST/react-native-screens/4.25.1/react-native-screens-4.25.1-rn0.85.1-codegen.aar
d5f55293fe416068fff502ddf8ce04393da182ecdd024f071912ff3751ef8abf  ~/.m2/repository/org/rnrepo/public/react-native-screens/4.25.1/react-native-screens-4.25.1-rn0.85.1-codegen.aar
d5f55293fe416068fff502ddf8ce04393da182ecdd024f071912ff3751ef8abf  ~/Downloads/RNREPO_STASH/CODEGEN_ARTIFACTS_FOR_PATCH_TEST/react-native-screens/4.25.1/react-native-screens-4.25.1-rn0.85.1-codegen.aar

WoLewicki added 10 commits December 23, 2025 18:06

feat: started work with extending plugin

fd4dbee

Merge branch 'main' into wolewicki/android-codegen

8b54a86

Merge branch 'main' into wolewicki/android-codegen

716b8ea

chore: merge current main

05e1e0a

feat: hopefully working version

178df46

feat: cleaner version

cfa3dc0

chore: change naming to codegen and make cmakelists work on all platf…

50e956f

…orms

fix: indent

2329c25

fix: local version

cd82d45

fix: proper repos

e525650

WoLewicki commented Jan 13, 2026

View reviewed changes

Comment thread packages/builder/patches/@react-native+codegen+0.81.4.patch

WoLewicki added 5 commits January 13, 2026 13:24

chore: lint

d65422e

feat: branch for local testing

00b4c1a

chore: only build one lib for checking

c42436f

fix: another place

6f6bf91

fix: publish codegen version

d7b3794

radoslawrolka requested a review from Copilot January 14, 2026 10:59

Copilot AI reviewed Jan 14, 2026

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WoLewicki added 5 commits January 14, 2026 13:01

feat: include headers in aar

a743447

fix: cleaner version

ec2a61e

fix: clean

9012d99

feat: build only codegen version for now

202a407

fix: proper libraries.json

e2c3306

WoLewicki changed the title ~~feat: started work with extending plugin~~ feat: codegen in android packages Jan 15, 2026

WoLewicki added 6 commits January 15, 2026 11:59

fix: clean up PR

ac3713e

Merge branch 'main' into wolewicki/android-codegen

3787056

fix: lint

7eb83e5

fix: restore comment

6acf25e

feat: include debug static libs

31ec76f

fix: wrong folder taken

eb1dcdd

WoLewicki and others added 7 commits January 20, 2026 21:15

feat: smaller codegen artifacts

978f2b1

feat: test enhanced codegen detection

1ac7e20

feat: include live-markdown

78804ad

feat: build libs without new arch too

377a00c

Merge branch 'main' into wolewicki/android-codegen

d1df356

Add conditional dependency for packageCppHeaders task

fb089c9

it failed for @react-native-firebase/* packages, now it works

Merge branch 'main' into wolewicki/android-codegen

6592654

radoslawrolka requested a review from Copilot April 2, 2026 09:20

Copilot started reviewing on behalf of radoslawrolka April 2, 2026 09:21 View session

Copilot AI reviewed Apr 2, 2026

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radoslawrolka added 10 commits April 7, 2026 13:39

remove cleaning project

ed518b2

it was introduced in #254

Merge branch 'main' into wolewicki/android-codegen

13f6ad2

remove using depreciated String::capitalized()

e9c0f73

remove commented old code

935f244

handle codegen suffix in publisher

f9cc88a

Merge branch 'main' into wolewicki/android-codegen

2aa5b1e

fix postinstall syntax

c437f3b

add gradle init to codegen building

22ae7d7

Merge branch 'main' into wolewicki/android-codegen

40f528a

kmagiera reviewed Jun 2, 2026

View reviewed changes

radoslawrolka added 8 commits June 10, 2026 14:28

fix typos and add comments

e350933

No more mutating classifier just to derive a filename

211c87b

extract duplicated functions

3addc89

comment .patch

db3d9ac

commit to patch-package@8

7188296

refactor isPackageAvailable to search for basic and codegen artifacts

a194285

lint

669c4c5

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WoLewicki commented Jan 13, 2026 •

edited by radoslawrolka

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radoslawrolka commented Jun 11, 2026 •

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