app/build.gradle

import groovy.xml.XmlUtil

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'

android {

    compileSdkVersion 30
    buildToolsVersion '30.0.2'  // adapt in .travis.yaml if changed here

    defaultConfig {
        minSdkVersion 29 // leave at 29 for robolectric tests
        targetSdkVersion 30
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        testInstrumentationRunnerArguments disableAnalytics: 'true'
    }

    buildTypes {
        release {
            minifyEnabled false
        }
    }

    lintOptions {
        disable "CheckedExceptions"
        abortOnError true
    }
    compileOptions {
        targetCompatibility 1.8
        sourceCompatibility 1.8
    }
    kotlinOptions {
        jvmTarget = JavaVersion.VERSION_1_8.toString()
    }
    testOptions {
        unitTests.all {
            useJUnitPlatform()
            testLogging {
                events "passed", "skipped", "failed"
            }
        }
        unitTests {
            includeAndroidResources = true
        }
    }

    sourceSets {
        test {
            java.srcDirs += "$projectDir/src/sharedTest/java"
        }
        androidTest {
            java.srcDirs += "$projectDir/src/sharedTest/java"
        }
    }

    // optional signingConfigs
    def keystorePropertiesFile = rootProject.file("keystore.properties")
    if (keystorePropertiesFile.exists()) {
        def keystoreProperties = new Properties()
        keystoreProperties.load(new FileInputStream(keystorePropertiesFile))

        signingConfigs {
            release {
                keyAlias keystoreProperties['keyAlias']
                keyPassword keystoreProperties['keyPassword']
                storeFile file(keystoreProperties['storeFile'])
                storePassword keystoreProperties['storePassword']
            }
        }
        buildTypes.release.signingConfig = signingConfigs.release
        buildTypes.debug.signingConfig = signingConfigs.release
    }
}

gradle.projectsEvaluated {
    tasks.withType(JavaCompile) {
        if (JavaVersion.current() >= JavaVersion.VERSION_1_9) {
            options.compilerArgs.addAll(['--release', '8'])
        }
        options.compilerArgs.add('-Xbootclasspath/p:app/libs/android.jar:app/libs/libcore.jar')
    }
}

// http://www.31mins.com/android-studio-build-system-application/
preBuild.doLast {
    def imlFile = file(project.name + ".iml")

    try {
        def parsedXml = (new XmlParser()).parse(imlFile)
        def jdkNode = parsedXml.component[1].orderEntry.find { it.'@type' == 'jdk' }
        parsedXml.component[1].remove(jdkNode)

        def sdkString = "Android API " + android.compileSdkVersion.substring("android-".length()) + " Platform"
        //noinspection GroovyResultOfObjectAllocationIgnored // the note gets inserted
        new Node(parsedXml.component[1], 'orderEntry', ['type': 'jdk', 'jdkName': sdkString, 'jdkType': 'Android SDK'])
        XmlUtil.serialize(parsedXml, new FileOutputStream(imlFile))

    } catch (NullPointerException | FileNotFoundException ex) {
        ex.printStackTrace()
    }
}

// To produce these binaries, in latest AOSP source tree, run
// $ m
def aospDeps = fileTree(include: [
        // For more information about this module:
        // https://android.googlesource.com/platform/frameworks/base/+/refs/tags/android-11.0.0_r3/Android.bp#507
        // framework_intermediates/classes-header.jar works for gradle build as well,
        // but not unit tests, so we use the actual classes (without updatable modules).
        //
        // out/target/common/obj/JAVA_LIBRARIES/framework-minus-apex_intermediates/classes.jar
        'android.jar',
        // out/target/common/obj/JAVA_LIBRARIES/core-libart.com.android.art.release_intermediates/classes.jar
        'libcore.jar'
], dir: 'libs')

dependencies {
    compileOnly aospDeps

    /**
     * Dependencies in AOSP
     *
     * We try to keep the dependencies in sync with what AOSP ships as Seedvault is meant to be built
     * with the AOSP build system and gradle builds are just for more pleasant development.
     * Using the AOSP versions in gradle builds allows us to spot issues early on.
     */

    //noinspection GradleDependency
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"

    // https://android.googlesource.com/platform/prebuilts/sdk/+/refs/tags/android-11.0.0_r3/current/androidx/Android.bp#610
    //noinspection GradleDependency
    implementation 'androidx.core:core-ktx:1.5.0-alpha01'

    // A newer version gets pulled in with AOSP via core, so we include this here explicitly
    // https://android.googlesource.com/platform/prebuilts/sdk/+/refs/tags/android-11.0.0_r3/current/androidx/Android.bp#930
    //noinspection GradleDependency
    implementation 'androidx.fragment:fragment-ktx:1.3.0-alpha07'

    // https://android.googlesource.com/platform/prebuilts/sdk/+/refs/tags/android-11.0.0_r3/current/androidx/Android.bp#2412
    //noinspection GradleDependency
    implementation 'androidx.preference:preference:1.1.1' // 1.2.0-alpha01 is not even released

    // https://android.googlesource.com/platform/prebuilts/sdk/+/refs/tags/android-11.0.0_r3/current/androidx/Android.bp#1553
    //noinspection GradleDependency
    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.3.0-alpha05'

    // https://android.googlesource.com/platform/prebuilts/sdk/+/refs/tags/android-11.0.0_r3/current/androidx/Android.bp#1353
    //noinspection GradleDependency
    implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.3.0-alpha05'

    // https://android.googlesource.com/platform/prebuilts/sdk/+/refs/tags/android-11.0.0_r3/current/extras/constraint-layout-x/Android.bp#30
    //noinspection GradleDependency
    implementation 'androidx.constraintlayout:constraintlayout:2.0.0-beta7'

    // https://android.googlesource.com/platform/prebuilts/sdk/+/refs/tags/android-11.0.0_r3/current/extras/material-design-x/Android.bp#6
    //noinspection GradleDependency
    implementation 'com.google.android.material:material:1.1.0-alpha05'


    /**
     * External Dependencies
     *
     * If the dependencies below are updated,
     * please make sure to update the prebuilt libraries and the Android.bp files
     * in the top-level `libs` folder to reflect that.
     * You can copy these libraries from ~/.gradle/caches/modules-2
     */

    def koin_version = '2.1.1'
    implementation("org.koin:koin-android:$koin_version") {
        exclude group: 'org.jetbrains.kotlin', module: 'kotlin-stdlib'
    }
    implementation("org.koin:koin-androidx-viewmodel:$koin_version") {
        exclude group: 'org.koin', module: 'koin-androidx-scope'
        exclude group: 'androidx.lifecycle'
    }

    implementation 'io.github.novacrypto:BIP39:2019.01.27'

    /**
     * Test Dependencies (do not concern the AOSP build)
     */

    lintChecks 'com.github.thirdegg:lint-rules:0.0.5-alpha'

    def junit_version = "5.5.2"  // careful, upgrading this can change a Cipher's IV size in tests!?
    def mockk_version = "1.10.0"
    testImplementation aospDeps  // anything less than 'implementation' fails tests run with gradlew
    testImplementation 'androidx.test.ext:junit:1.1.2'
    testImplementation('org.robolectric:robolectric:4.3.1') { // 4.4 has issue with non-idle Looper
        // https://github.com/robolectric/robolectric/issues/5245
        exclude group: "com.google.auto.service", module: "auto-service"
    }
    testImplementation "org.junit.jupiter:junit-jupiter-api:$junit_version"
    testImplementation "io.mockk:mockk:$mockk_version"
    testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:$junit_version"
    testRuntimeOnly "org.junit.vintage:junit-vintage-engine:$junit_version"

    androidTestImplementation 'androidx.test:runner:1.3.0'
    androidTestImplementation 'androidx.test:rules:1.3.0'
    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
    androidTestImplementation "io.mockk:mockk-android:$mockk_version"
}