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Meshtastic-Android/docs/developer/codebase.md

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---
title: Codebase
nav_order: 2
last_updated: 2026-05-13
aliases:
- repository-layout
- project-structure
- source-code
---
# Codebase
Repository layout, namespacing conventions, and build system overview.
## Repository Structure
```
Meshtastic-Android/
├── app/ # Android application module
│ ├── src/main/ # Shared Android code
│ ├── src/google/ # Google Play flavor (Gemini, proprietary)
│ └── src/fdroid/ # F-Droid flavor (FOSS-only)
├── desktop/ # Desktop JVM application
├── feature/ # Feature modules (KMP)
│ ├── intro/
│ ├── messaging/
│ ├── connections/
│ ├── map/
│ ├── node/
│ ├── settings/
│ ├── firmware/
│ ├── docs/
│ ├── wifi-provision/
│ └── widget/
├── core/ # Core infrastructure modules (KMP)
│ ├── common/
│ ├── navigation/
│ ├── ui/
│ ├── resources/
│ ├── model/
│ ├── data/
│ ├── database/
│ ├── datastore/
│ ├── prefs/
│ ├── repository/
│ ├── service/
│ ├── di/
│ ├── network/
│ ├── ble/
│ ├── proto/
│ └── testing/
├── build-logic/ # Convention plugins and build helpers
│ └── convention/
├── docs/ # Documentation source (markdown)
│ ├── user/
│ └── developer/
├── gradle/ # Gradle wrapper and version catalog
│ └── libs.versions.toml
├── specs/ # Feature specifications
└── .github/workflows/ # CI/CD workflows
```
## Namespacing Convention
All Kotlin packages follow the pattern:
```
org.meshtastic.{layer}.{module}.{subpackage}
```
Examples:
- `org.meshtastic.core.navigation` — core navigation module
- `org.meshtastic.feature.docs.ui` — docs feature UI package
- `org.meshtastic.app.di` — app DI configuration
## Build System
### Gradle Kotlin DSL
All build files use Kotlin DSL (`.gradle.kts`). Configuration:
- **Version catalog:** `gradle/libs.versions.toml`
- **Convention plugins:** `build-logic/convention/`
- **Settings:** `settings.gradle.kts`
### Convention Plugins
Located in `build-logic/convention/src/main/kotlin/org/meshtastic/buildlogic/`:
| Plugin | Purpose |
|--------|---------|
| `meshtastic.kmp.feature` | Standard feature module setup |
| `meshtastic.kmp.jvm.android` | JVM + Android target configuration |
| `meshtastic.kotlinx.serialization` | Serialization plugin setup |
### Build Variants (Android)
| Flavor | Description |
|--------|-------------|
| `google` | Google Play distribution; includes proprietary APIs |
| `fdroid` | F-Droid distribution; FOSS-only dependencies |
### Key Gradle Tasks
```bash
# Compile check across all KMP targets
./gradlew kmpSmokeCompile
# Run all tests
./gradlew allTests
# Code quality
./gradlew spotlessCheck detekt
# Android build
./gradlew assembleGoogleDebug assembleFdroidDebug
# Desktop run
./gradlew :desktop:run
```
## Version Catalog Highlights
Key dependencies in `gradle/libs.versions.toml`:
| Category | Library |
|----------|---------|
| Compose | Compose Multiplatform (JetBrains) |
| Navigation | Navigation 3 |
| DI | Koin (annotations) |
| Serialization | kotlinx.serialization |
| Database | Room KMP |
| Networking | Ktor |
| Markdown | multiplatform-markdown-renderer |
| Testing | kotlin-test, compose-ui-test |
---