react.gradle

// Copyright (c) Facebook, Inc. and its affiliates.

// This source code is licensed under the MIT license found in the
// LICENSE file in the root directory of this source tree.

import org.apache.tools.ant.taskdefs.condition.Os

def config = project.hasProperty("react") ? project.react : [];

def cliPath = config.cliPath ?: "node_modules/react-native/cli.js"
def bundleAssetName = config.bundleAssetName ?: "index.android.bundle"
def entryFile = config.entryFile ?: "index.android.js"
def bundleCommand = config.bundleCommand ?: "bundle"
def reactRoot = file(config.root ?: "../../")
def inputExcludes = config.inputExcludes ?: ["android/**", "ios/**"]
def bundleConfig = config.bundleConfig ? "${reactRoot}/${config.bundleConfig}" : null ;


afterEvaluate {
    def isAndroidLibrary = plugins.hasPlugin("com.android.library")
    def variants = isAndroidLibrary ? android.libraryVariants : android.applicationVariants
    variants.all { def variant ->
        // Create variant and target names
        def targetName = variant.name.capitalize()
        def targetPath = variant.dirName

        // React js bundle directories
        def jsBundleDir = file("$buildDir/generated/assets/react/${targetPath}")
        def resourcesDir = file("$buildDir/generated/res/react/${targetPath}")

        def jsBundleFile = file("$jsBundleDir/$bundleAssetName")

        // Additional node and packager commandline arguments
        def nodeExecutableAndArgs = config.nodeExecutableAndArgs ?: ["node"]
        def extraPackagerArgs = config.extraPackagerArgs ?: []

        def currentBundleTask = tasks.create(
            name: "bundle${targetName}JsAndAssets",
            type: Exec) {
            group = "react"
            description = "bundle JS and assets for ${targetName}."

            // Create dirs if they are not there (e.g. the "clean" task just ran)
            doFirst {
                jsBundleDir.deleteDir()
                jsBundleDir.mkdirs()
                resourcesDir.deleteDir()
                resourcesDir.mkdirs()
            }

            // Set up inputs and outputs so gradle can cache the result
            inputs.files fileTree(dir: reactRoot, excludes: inputExcludes)
            outputs.dir(jsBundleDir)
            outputs.dir(resourcesDir)

            // Set up the call to the react-native cli
            workingDir(reactRoot)

            // Set up dev mode
            def devEnabled = !(config."devDisabledIn${targetName}"
                || targetName.toLowerCase().contains("release"))

            def extraArgs = extraPackagerArgs;

            if (bundleConfig) {
                extraArgs = extraArgs.clone()
                extraArgs.add("--config");
                extraArgs.add(bundleConfig);
            }

            if (Os.isFamily(Os.FAMILY_WINDOWS)) {
                commandLine("cmd", "/c", *nodeExecutableAndArgs, cliPath, bundleCommand, "--platform", "android", "--dev", "${devEnabled}",
                    "--reset-cache", "--entry-file", entryFile, "--bundle-output", jsBundleFile, "--assets-dest", resourcesDir, *extraArgs)
            } else {
                commandLine(*nodeExecutableAndArgs, cliPath, bundleCommand, "--platform", "android", "--dev", "${devEnabled}",
                    "--reset-cache", "--entry-file", entryFile, "--bundle-output", jsBundleFile, "--assets-dest", resourcesDir, *extraArgs)
            }

            enabled config."bundleIn${targetName}" != null
              ? config."bundleIn${targetName}"
              : config."bundleIn${variant.buildType.name.capitalize()}" != null
                ? config."bundleIn${variant.buildType.name.capitalize()}"
                : targetName.toLowerCase().contains("release")
        }

        // Expose a minimal interface on the application variant and the task itself:
        variant.ext.bundleJsAndAssets = currentBundleTask
        currentBundleTask.ext.generatedResFolders = files(resourcesDir).builtBy(currentBundleTask)
        currentBundleTask.ext.generatedAssetsFolders = files(jsBundleDir).builtBy(currentBundleTask)

        // registerGeneratedResFolders for Android plugin 3.x
        if (variant.respondsTo("registerGeneratedResFolders")) {
            variant.registerGeneratedResFolders(currentBundleTask.generatedResFolders)
        } else {
            variant.registerResGeneratingTask(currentBundleTask)
        }
        variant.mergeResourcesProvider.get().dependsOn(currentBundleTask)

        // packageApplication for Android plugin 3.x
        def packageTask = variant.hasProperty("packageApplication")
            ? variant.packageApplicationProvider.get()
            : tasks.findByName("package${targetName}")
        if (variant.hasProperty("packageLibrary")) {
            packageTask = variant.packageLibrary
        }

        // pre bundle build task for Android plugin 3.2+
        def buildPreBundleTask = tasks.findByName("build${targetName}PreBundle")

        def resourcesDirConfigValue = config."resourcesDir${targetName}"
        if (resourcesDirConfigValue) {
            def currentCopyResTask = tasks.create(
                name: "copy${targetName}BundledResources",
                type: Copy) {
                group = "react"
                description = "copy bundled resources into custom location for ${targetName}."

                from(resourcesDir)
                into(file(resourcesDirConfigValue))

                dependsOn(currentBundleTask)

                enabled(currentBundleTask.enabled)
            }

            packageTask.dependsOn(currentCopyResTask)
            if (buildPreBundleTask != null) {
                buildPreBundleTask.dependsOn(currentCopyResTask)
            }
        }

        def currentAssetsCopyTask = tasks.create(
            name: "copy${targetName}BundledJs",
            type: Copy) {
            group = "react"
            description = "copy bundled JS into ${targetName}."

            if (config."jsBundleDir${targetName}") {
                from(jsBundleDir)
                into(file(config."jsBundleDir${targetName}"))
            } else {
                into ("$buildDir/intermediates")
                into ("assets/${targetPath}") {
                    from(jsBundleDir)
                }

                // Workaround for Android Gradle Plugin 3.2+ new asset directory
                into ("merged_assets/${variant.name}/merge${targetName}Assets/out") {
                    from(jsBundleDir)
                }
            }

            // mergeAssets must run first, as it clears the intermediates directory
            dependsOn(variant.mergeAssetsProvider.get())

            enabled(currentBundleTask.enabled)
        }

        packageTask.dependsOn(currentAssetsCopyTask)
        if (buildPreBundleTask != null) {
            buildPreBundleTask.dependsOn(currentAssetsCopyTask)
        }
    }
}