build.gradle

def tryInt = { string ->
    if (string == null) {
        return string
    }
    if (string.isInteger()) {
        return string as Integer
    }
    return string
}

allprojects {
    // Expose the per-object-directory configuration to all projects.
    ext {
        mozconfig = gradle.mozconfig
        topsrcdir = gradle.mozconfig.topsrcdir
        topobjdir = gradle.mozconfig.topobjdir

        compileSdkVersion = 28
        targetSdkVersion = tryInt(mozconfig.substs.ANDROID_TARGET_SDK)
        minSdkVersion = tryInt(mozconfig.substs.MOZ_ANDROID_MIN_SDK_VERSION)
        manifestPlaceholders = [
            ANDROID_PACKAGE_NAME: mozconfig.substs.ANDROID_PACKAGE_NAME,
            ANDROID_TARGET_SDK: mozconfig.substs.ANDROID_TARGET_SDK,
            MOZ_ANDROID_MIN_SDK_VERSION: mozconfig.substs.MOZ_ANDROID_MIN_SDK_VERSION,
        ]
    }

    repositories {
        gradle.mozconfig.substs.GRADLE_MAVEN_REPOSITORIES.each { repository ->
            maven {
                url repository
            }
        }
    }

    task downloadDependencies() {
        description 'Download all dependencies to the Gradle cache'
        doLast {
            configurations.each { configuration ->
                if (configuration.canBeResolved) {
                    configuration.allDependencies.each { dependency ->
                        try {
                            configuration.files(dependency)
                        } catch(e) {
                            println("Could not resolve ${configuration.name} -> ${dependency.name}")
                            println(" > ${e.message}")
                            if (e.cause) {
                                println(" >> ${e.cause}")
                                if (e.cause.cause) {
                                    println(" >> ${e.cause.cause}")
                                }
                            }
                            println("")
                        }
                    }
                }
            }
        }
    }
}

buildDir "${topobjdir}/gradle/build"

buildscript {
    repositories {
        gradle.mozconfig.substs.GRADLE_MAVEN_REPOSITORIES.each { repository ->
            maven {
                url repository
            }
        }
    }

    ext.kotlin_version = '1.3.41'
    ext.support_library_version = '28.0.0'
    ext.jacoco_version = '0.8.1'
    ext.lifecycle_library_version = '1.1.1'

    if (gradle.mozconfig.substs.MOZ_ANDROID_GOOGLE_PLAY_SERVICES) {
        ext.google_play_services_version = '15.0.1'
        ext.google_play_services_cast_version = '16.0.0'
        ext.google_play_services_fido_version = '17.0.0'
    }

    dependencies {
        classpath 'org.mozilla.apilint:apilint:0.2.6'
        classpath 'com.android.tools.build:gradle:3.4.2'
        classpath 'com.getkeepsafe.dexcount:dexcount-gradle-plugin:0.8.2'
        classpath 'org.apache.commons:commons-exec:1.3'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

// A stream that processes bytes line by line, prepending a tag before sending
// each line to Gradle's logging.
class TaggedLogOutputStream extends org.apache.commons.exec.LogOutputStream {
    String tag
    Logger logger

    TaggedLogOutputStream(tag, logger) {
        this.tag = tag
        this.logger = logger
    }

    void processLine(String line, int level) {
        logger.lifecycle("${this.tag} ${line}")
    }
}

ext.geckoBinariesOnlyIf = { task ->
    // Never when Gradle was invoked within `mach build`.
    if ('1' == System.env.GRADLE_INVOKED_WITHIN_MACH_BUILD) {
        rootProject.logger.lifecycle("Skipping task ${task.path} because: within `mach build`")
        return false
    }

    // Never for official builds.
    if (mozconfig.substs.MOZILLA_OFFICIAL) {
        rootProject.logger.lifecycle("Skipping task ${task.path} because: MOZILLA_OFFICIAL")
        return false
    }

    // Multi-l10n builds set `AB_CD=multi`, which isn't a valid locale.  This
    // causes the
    //
    // |mach build| > |mach gradle| >
    // |mach build mobile/android/base/generated_android_code_and_resources| >
    // AndroidManifest.xml > strings.xml > multi/brand.dtd
    //
    // dependency chain to fail, since multi isn't a real locale.  To avoid
    // this, if Gradle is invoked with AB_CD=multi, we don't invoke Make at all.
    if ('multi' == System.env.AB_CD) {
        rootProject.logger.lifecycle("Skipping task ${task.path} because: AB_CD=multi")
        return false
    }

    // Single-locale l10n repacks set `IS_LANGUAGE_REPACK=1` and handle resource
    // and code generation themselves.
    if ('1' == System.env.IS_LANGUAGE_REPACK) {
        rootProject.logger.lifecycle("Skipping task ${task.path} because: IS_LANGUAGE_REPACK")
        return false
    }

    rootProject.logger.lifecycle("Executing task ${task.path}")
    return true
}

class MachExec extends Exec {
    def MachExec() {
        // Bug 1543982: When invoking `mach build` recursively, the outer `mach
        // build` itself modifies the environment, causing configure to run
        // again.  This tries to restore the environment that the outer `mach
        // build` was invoked in.  See the comment in
        // $topsrcdir/settings.gradle.
        project.ext.mozconfig.mozconfig.env.unmodified.each { k, v -> environment.remove(k) }
        environment project.ext.mozconfig.orig_mozconfig.env.unmodified
    }
}

// Why |mach build mobile/android/base/...| and |mach build faster|?  |mach
// build faster| generates dependentlibs.list, which in turn depends on compiled
// code.  That causes a circular dependency between Java compilation/JNI wrapper
// generation/native code compilation.  So we have the special target for
// Android-specific generated code, and the |mach build faster| target for all
// the stuff that goes into the omnijar.
task machBuildFaster(type: MachExec) {
    onlyIf rootProject.ext.geckoBinariesOnlyIf

    workingDir "${topsrcdir}"

    commandLine mozconfig.substs.PYTHON
    args "${topsrcdir}/mach"
    args 'build'
    args 'faster'

    // Add `-v` if we're running under `--info` (or `--debug`).
    if (project.logger.isEnabled(LogLevel.INFO)) {
        args '-v'
    }

    // `path` is like `:machBuildFaster`.
    standardOutput = new TaggedLogOutputStream("${path}>", logger)
    errorOutput = standardOutput
}

def createMachStagePackageTask(name) {
    return task(name, type: MachExec) {
        onlyIf rootProject.ext.geckoBinariesOnlyIf

        dependsOn rootProject.machBuildFaster

        workingDir "${topobjdir}"

        // We'd prefer this to be a `mach` invocation, but `mach build
        // mobile/android/installer/stage-package` doesn't work as expected.
        commandLine mozconfig.substs.GMAKE
        args '-C'
        args "${topobjdir}/mobile/android/installer"
        args 'stage-package'

        outputs.file "${topobjdir}/dist/fennec/assets/${mozconfig.substs.ANDROID_CPU_ARCH}/libxul.so"
        outputs.file "${topobjdir}/dist/fennec/lib/${mozconfig.substs.ANDROID_CPU_ARCH}/libmozglue.so"

        // Force running `stage-package`.
        outputs.upToDateWhen { false }

        // `path` is like `:machStagePackage`.
        standardOutput = new TaggedLogOutputStream("${path}>", logger)
        errorOutput = standardOutput
    }
}

createMachStagePackageTask("machStagePackageForFennec").with {
    outputs.file "${topobjdir}/dist/fennec/assets/omni.ja"
}

createMachStagePackageTask("machStagePackageForGeckoview").with {
    args 'MOZ_GECKOVIEW_JAR=1'
    outputs.file "${topobjdir}/dist/geckoview/assets/omni.ja"
    // Avoid races between stage-package invocations.
    mustRunAfter tasks["machStagePackageForFennec"]
}

afterEvaluate {
    subprojects { project ->
        tasks.withType(JavaCompile) {
            // Add compiler args for all code except third-party code.
            options.compilerArgs += [
                // Turn on all warnings, except...
                "-Xlint:all",
                // Deprecation, because we do use deprecated API for compatibility.
                "-Xlint:-deprecation",
                // Serial, because we don't use Java serialization.
                "-Xlint:-serial",
                // Classfile, because javac has a bug with MethodParameters attributes
                // with Java 7. https://bugs.openjdk.java.net/browse/JDK-8190452
                "-Xlint:-classfile",
                // Turn all remaining warnings into errors,
                // unless marked by @SuppressWarnings.
                "-Werror"]
        }
    }
}

apply plugin: 'idea'

idea {
    project {
        languageLevel = '1.8'
    }

    module {
        // Object directories take a huge amount of time for IntelliJ to index.
        // Exclude them.  Convention is that object directories start with obj.
        // IntelliJ is clever and will not exclude the parts of the object
        // directory that are referenced, if there are any.  In practice,
        // indexing the entirety of the tree is taking too long, so exclude all
        // but mobile/.
        def topsrcdirURI = file(topsrcdir).toURI()
        excludeDirs += files(file(topsrcdir)
            .listFiles({it.isDirectory()} as FileFilter)
            .collect({topsrcdirURI.relativize(it.toURI()).toString()}) // Relative paths.
            .findAll({!it.equals('mobile/')}))

        // If topobjdir is below topsrcdir, hide only some portions of that tree.
        def topobjdirURI = file(topobjdir).toURI()
        if (!topsrcdirURI.relativize(topobjdirURI).isAbsolute()) {
            excludeDirs -= file(topobjdir)
            excludeDirs += files(file(topobjdir).listFiles())
            excludeDirs -= file("${topobjdir}/gradle")
        }
    }
}