| 1 | import com.android.build.api.artifact.SingleArtifact |
| 2 | |
| 3 | plugins { |
| 4 | id("com.android.application") |
| 5 | id("org.jetbrains.kotlin.plugin.compose") |
| 6 | } |
| 7 | |
| 8 | // One version for everything (CLAUDE.md, releases): the cargo workspace's. |
| 9 | val workspace: File = rootDir.parentFile |
| 10 | val version: String = workspace.resolve("Cargo.toml").readLines() |
| 11 | .first { it.startsWith("version = ") } |
| 12 | .substringAfter('"').substringBefore('"') |
| 13 | |
| 14 | android { |
| 15 | namespace = "io.github.krolyxon.budctl" |
| 16 | compileSdk = 37 |
| 17 | // For stripping the Rust library's debug symbols from the APK, and for cargo-ndk. |
| 18 | ndkVersion = "30.0.16248370" |
| 19 | |
| 20 | defaultConfig { |
| 21 | applicationId = "io.github.krolyxon.budctl" |
| 22 | // Android 12: BLUETOOTH_CONNECT begins there (docs/android.md#bluetooth). |
| 23 | minSdk = 31 |
| 24 | targetSdk = 37 |
| 25 | versionName = version |
| 26 | versionCode = version.split('.').fold(0) { code, part -> code * 100 + part.toInt() } |
| 27 | } |
| 28 | |
| 29 | buildTypes { |
| 30 | // Only where the Rust library is built for: the phone, and the emulator in debug builds. |
| 31 | debug { |
| 32 | ndk { abiFilters += listOf("arm64-v8a", "x86_64") } |
| 33 | } |
| 34 | release { |
| 35 | ndk { abiFilters += listOf("arm64-v8a") } |
| 36 | // The Rust library calls Platform's methods by name, so nothing may rename them. |
| 37 | isMinifyEnabled = false |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | buildFeatures { |
| 42 | compose = true |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | dependencies { |
| 47 | implementation(platform("androidx.compose:compose-bom:2026.09.00")) |
| 48 | implementation("androidx.activity:activity-compose:1.13.0") |
| 49 | implementation("androidx.compose.foundation:foundation") |
| 50 | implementation("androidx.compose.ui:ui") |
| 51 | testImplementation("junit:junit:4.13.2") |
| 52 | } |
| 53 | |
| 54 | /** The Rust library (crates/budctl-android), built by cargo-ndk into [output]/<abi>/. */ |
| 55 | abstract class CargoNdk : Exec() { |
| 56 | @get:OutputDirectory |
| 57 | abstract val output: DirectoryProperty |
| 58 | } |
| 59 | |
| 60 | /** Rule 1 (CLAUDE.md): the app never gets network access, not even from a library's manifest. */ |
| 61 | abstract class CheckNoInternet : DefaultTask() { |
| 62 | @get:InputFile |
| 63 | abstract val manifest: RegularFileProperty |
| 64 | |
| 65 | @TaskAction |
| 66 | fun check() { |
| 67 | if ("android.permission.INTERNET" in manifest.get().asFile.readText()) { |
| 68 | throw GradleException("The merged manifest asks for INTERNET; budctl must not (CLAUDE.md rule 1).") |
| 69 | } |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | androidComponents { |
| 74 | onVariants { variant -> |
| 75 | val name = variant.name.replaceFirstChar { it.uppercase() } |
| 76 | val release = variant.buildType == "release" |
| 77 | // Debug builds also run on the emulator (x86_64); releases only on the phone. |
| 78 | val abis = if (release) listOf("arm64-v8a") else listOf("arm64-v8a", "x86_64") |
| 79 | val ndk = sdkComponents.ndkDirectory |
| 80 | |
| 81 | val cargo = tasks.register<CargoNdk>("cargoNdk$name") { |
| 82 | workingDir = workspace |
| 83 | executable = "cargo" |
| 84 | // Cargo knows what to rebuild, so it always runs. |
| 85 | outputs.upToDateWhen { false } |
| 86 | argumentProviders.add { |
| 87 | listOf("ndk", "--platform", "31") + abis.flatMap { listOf("--target", it) } + |
| 88 | listOf("--output-dir", output.get().asFile.path, "build", "-p", "budctl-android") + |
| 89 | if (release) listOf("--release") else emptyList() |
| 90 | } |
| 91 | doFirst { environment("ANDROID_NDK_HOME", ndk.get().asFile.path) } |
| 92 | } |
| 93 | variant.sources.jniLibs?.addGeneratedSourceDirectory(cargo, CargoNdk::output) |
| 94 | |
| 95 | val check = tasks.register<CheckNoInternet>("check${name}NoInternet") { |
| 96 | manifest.set(variant.artifacts.get(SingleArtifact.MERGED_MANIFEST)) |
| 97 | } |
| 98 | tasks.matching { it.name == "package$name" }.configureEach { dependsOn(check) } |
| 99 | } |
| 100 | } |