# Building CellGuard

## Toolchain

| Component         | Version   |
|-------------------|-----------|
| Gradle (wrapper)  | 8.9       |
| Android Gradle Plugin | 8.5.2 |
| Kotlin            | 1.9.23    |
| Compose compiler  | 1.5.11    |
| JDK               | 21        |
| compileSdk / targetSdk | 35   |
| minSdk            | 33        |
| Build tools       | 35.0.0    |

These versions are mutually compatible: AGP 8.5.2 requires Gradle 8.7+ and JDK 17+
(JDK 21 is fine), and Kotlin 1.9.23 pins the Compose compiler extension to 1.5.11.

## Prerequisites

- JDK 21 installed at `/usr/lib/jvm/java-21-openjdk-arm64`
- Android SDK at `/home/snake/Android/Sdk` with:
  - `platforms/android-35`
  - `build-tools/35.0.0`
- Network access for the first build (downloads AndroidX, Compose BOM 2024.06.00,
  and libsu 5.2.2 from Google, Maven Central, and JitPack).

## Build command (debug APK)

```bash
export JAVA_HOME=/usr/lib/jvm/java-21-openjdk-arm64
export ANDROID_HOME=/home/snake/Android/Sdk
cd /home/snake/CellGuard-app && ./gradlew :app:assembleDebug
```

## Output

The debug APK is written to:

```
/home/snake/CellGuard-app/app/build/outputs/apk/debug/app-debug.apk
```

For a release (unsigned) build, run `./gradlew :app:assembleRelease`; the artifact
lands in `app/build/outputs/apk/release/`.