foto-duplicate-finder/app/build.gradle.kts

import java.util.Properties
import org.gradle.api.tasks.testing.Test

plugins {
    alias(libs.plugins.android.application)
    alias(libs.plugins.kotlin.compose)
}

// Optional release signing.
//
// Create a `keystore.properties` file in the project ROOT (it is git-ignored; see
// keystore.properties.example) with:
//
//   storeFile=/absolute/path/to/upload-keystore.jks
//   storePassword=********
//   keyAlias=upload
//   keyPassword=********
//
// Without that file the release build still runs R8/minification but produces an
// unsigned APK, which is fine for local checks but cannot be uploaded to Play.
val keystorePropertiesFile = rootProject.file("keystore.properties")
val keystoreProperties = Properties().apply {
    if (keystorePropertiesFile.exists()) {
        keystorePropertiesFile.inputStream().use { load(it) }
    }
}
val hasReleaseSigning = keystoreProperties.getProperty("storeFile") != null

if (hasReleaseSigning) {
    // Fail early and readably instead of letting signReleaseBundle blow up later
    // with an opaque NullPointerException.
    val missing = listOf("storePassword", "keyAlias")
        .filter { keystoreProperties.getProperty(it).isNullOrBlank() }
    check(missing.isEmpty()) {
        "keystore.properties is incomplete — missing: ${missing.joinToString()}"
    }
}

android {
    namespace = "de.softwareapp_hb.fotodup.finder"
    compileSdk = 36

    defaultConfig {
        applicationId = "de.softwareapp_hb.fotodup.finder"
        minSdk = 26
        targetSdk = 36
        versionCode = 2
        versionName = "1.0.1"

        vectorDrawables {
            useSupportLibrary = true
        }
    }

    signingConfigs {
        if (hasReleaseSigning) {
            create("release") {
                storeFile = file(keystoreProperties.getProperty("storeFile"))
                storePassword = keystoreProperties.getProperty("storePassword")
                keyAlias = keystoreProperties.getProperty("keyAlias")
                // Falls back to the store password. That matches reality: PKCS12
                // keystores (the default on modern JDKs) cannot have a key password
                // that differs from the store password, and leaving this null makes
                // AGP's signReleaseBundle crash with an NPE.
                keyPassword = keystoreProperties.getProperty("keyPassword")
                    ?: keystoreProperties.getProperty("storePassword")
            }
        }
    }

    buildTypes {
        debug {
            applicationIdSuffix = ".debug"
            versionNameSuffix = "-debug"
        }
        release {
            if (hasReleaseSigning) {
                signingConfig = signingConfigs.getByName("release")
            }
            isMinifyEnabled = true
            isShrinkResources = true
            proguardFiles(
                getDefaultProguardFile("proguard-android-optimize.txt"),
                "proguard-rules.pro",
            )
        }
    }

    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_17
        targetCompatibility = JavaVersion.VERSION_17
    }

    buildFeatures {
        compose = true
    }

    testOptions {
        unitTests {
            // Robolectric needs the merged resources and manifest to stand up the framework.
            isIncludeAndroidResources = true
        }
    }

    packaging {
        resources {
            excludes += "/META-INF/{AL2.0,LGPL2.1}"
        }
    }

    lint {
        // Dependency versions are pinned deliberately — Compose 1.12+/Coil 3.6+ need
        // compileSdk 37, which AGP 9.1 does not support yet (see the README version
        // note). These advisories are noise rather than signal here.
        disable += setOf(
            "GradleDependency",
            "AndroidGradlePluginVersion",
            "NewerVersionAvailable",
        )
    }
}

kotlin {
    compilerOptions {
        // With AGP built-in Kotlin this already defaults to
        // android.compileOptions.targetCompatibility; set explicitly for clarity.
        jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
    }
}

// `java.awt` is used by the similarity benchmark (headless), and the benchmark itself is
// opt-in. Gradle's -D only reaches the Gradle JVM, so the flags are forwarded explicitly.
// Run it with:
//   ./gradlew :app:testDebugUnitTest --tests '*SimilarityBenchmarkTest*' -DfotoBench=true
tasks.withType<Test>().configureEach {
    systemProperty("java.awt.headless", "true")
    // Robolectric reflects into JDK internals (notably java.io.FileDescriptor), which the module
    // system blocks from JDK 17 onwards. Without these it fails with "Failed to interact with raw
    // FileDescriptor internals".
    jvmArgs(
        "--add-opens=java.base/java.io=ALL-UNNAMED",
        "--add-opens=java.base/java.lang=ALL-UNNAMED",
        "--add-opens=java.base/java.lang.reflect=ALL-UNNAMED",
        "--add-opens=java.base/java.util=ALL-UNNAMED",
        "--add-opens=java.base/java.text=ALL-UNNAMED",
        "--add-opens=java.base/java.nio=ALL-UNNAMED",
        "--add-opens=java.base/sun.nio.ch=ALL-UNNAMED",
        // Robolectric reaches FileDescriptor internals through jdk.internal.access.SharedSecrets, and
        // that needs an *export* rather than an *open*: without it the run dies with
        // "IllegalAccessException ... module java.base does not export jdk.internal.access".
        "--add-exports=java.base/jdk.internal.access=ALL-UNNAMED",
        "--add-exports=java.base/jdk.internal.misc=ALL-UNNAMED",
        "--add-exports=java.base/jdk.internal.reflect=ALL-UNNAMED",
    )
    systemProperty("fotoBench", providers.systemProperty("fotoBench").orNull ?: "false")
    providers.systemProperty("fotoBench.dir").orNull?.let { systemProperty("fotoBench.dir", it) }
    providers.systemProperty("fotoBench.count").orNull?.let { systemProperty("fotoBench.count", it) }
    providers.systemProperty("fotoBench.scenes").orNull?.let { systemProperty("fotoBench.scenes", it) }
    providers.systemProperty("fotoBench.density").orNull?.let { systemProperty("fotoBench.density", it) }
    providers.systemProperty("fotoBench.max").orNull?.let { systemProperty("fotoBench.max", it) }
    providers.systemProperty("fotoLocal.dir").orNull?.let { systemProperty("fotoLocal.dir", it) }
    providers.systemProperty("fotoScale").orNull?.let { systemProperty("fotoScale", it) }
    // Real-photo runs hold hundreds of decoded images in memory at once.
    maxHeapSize = "2g"
    testLogging { showStandardStreams = true }
}

dependencies {
    implementation(libs.androidx.core.ktx)
    // EXIF orientation, so a photo hashes the same whichever decode path served it.
    implementation(libs.androidx.exifinterface)

    implementation(libs.androidx.lifecycle.runtime.ktx)
    implementation(libs.androidx.lifecycle.runtime.compose)
    implementation(libs.androidx.lifecycle.viewmodel.compose)

    implementation(libs.androidx.activity.compose)

    implementation(platform(libs.androidx.compose.bom))
    implementation(libs.androidx.compose.ui)
    implementation(libs.androidx.compose.ui.graphics)
    implementation(libs.androidx.compose.ui.tooling.preview)
    implementation(libs.androidx.compose.material3)
    implementation(libs.androidx.compose.material.icons.core)

    implementation(libs.kotlinx.coroutines.android)
    implementation(libs.coil.compose)

    debugImplementation(libs.androidx.compose.ui.tooling)

    testImplementation(libs.junit)
    // Runs the real Android framework on the JVM, so the data layer is testable without a device.
    testImplementation(libs.robolectric)
}