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

        buildToolsVersion = mozconfig.substs.ANDROID_BUILD_TOOLS_VERSION
        compileSdkVersion = tryInt(mozconfig.substs.ANDROID_TARGET_SDK)
        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'

    dependencies {
        classpath 'org.mozilla.apilint:apilint:0.4.0'
        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.  To
    // avoid failures, 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
    }
}

task machBuildFaster(type: MachExec) {
    onlyIf rootProject.ext.geckoBinariesOnlyIf

    workingDir "${topsrcdir}"

    commandLine mozconfig.substs.PYTHON3
    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
}

task machStagePackage(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/geckoview/assets/omni.ja"

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

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")
        }
    }
}