react.gradle

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

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

/**
 * Detects CLI location in a similar fashion to the React Native CLI
 */
def detectCliPath(config) {
  if (config.cliPath) {
    return config.cliPath
  }
  if (new File("${projectDir}/../../node_modules/@tarojs/cli/index.js").exists()) {
    return "${projectDir}/../../node_modules/@tarojs/cli/index.js"
  }
  throw new Exception("Couldn't determine CLI location. " +
    "Please set `project.ext.react.cliPath` to the path of the @tarojs/cli cli.js");
}

def composeSourceMapsPath = config.composeSourceMapsPath ?: "node_modules/react-native/scripts/compose-source-maps.js"
def bundleAssetName = config.bundleAssetName ?: "index.android.bundle"
def bundleCommand = config.bundleCommand ?: "build"
def reactRoot = file(config.root ?: "../../")
def inputExcludes = config.inputExcludes ?: ["android/**", "ios/**"]
def bundleConfig = config.bundleConfig ? "${reactRoot}/${config.bundleConfig}" : null ;
def enableVmCleanup = config.enableVmCleanup == null ? true : config.enableVmCleanup
def hermesCommand = config.hermesCommand ?: "../../node_modules/hermes-engine/%OS-BIN%/hermesc"

def reactNativeDevServerPort() {
  def value = project.getProperties().get("reactNativeDevServerPort")
  return value != null ? value : "8081"
}

def reactNativeInspectorProxyPort() {
  def value = project.getProperties().get("reactNativeInspectorProxyPort")
  return value != null ? value : reactNativeDevServerPort()
}

def getHermesOSBin() {
  if (Os.isFamily(Os.FAMILY_WINDOWS)) return "win64-bin";
  if (Os.isFamily(Os.FAMILY_MAC)) return "osx-bin";
  if (Os.isOs(null, "linux", "amd64", null)) return "linux64-bin";
  throw new Exception("OS not recognized. Please set project.ext.react.hermesCommand " + "to the path of a working Hermes compiler.");
}

def getHermesCommand = {
    // If the project specifies a Hermes command, don't second guess it.
    if (!hermesCommand.contains("%OS-BIN%")) {
        return hermesCommand
    }
    // Execution on Windows fails with / as separator
    return hermesCommand
            .replaceAll("%OS-BIN%", getHermesOSBin())
            .replace('/' as char, File.separatorChar);
}

// Set enableHermesForVariant to a function to configure per variant,
// or set `enableHermes` to True/False to set all of them
def enableHermesForVariant = config.enableHermesForVariant ?: {
    def variant -> config.enableHermes ?: false
}

android {
    buildTypes.all {
        resValue "integer", "react_native_dev_server_port", reactNativeDevServerPort()
        resValue "integer", "react_native_inspector_proxy_port", reactNativeInspectorProxyPort()
    }
}

afterEvaluate {
    def isAndroidLibrary = plugins.hasPlugin("com.android.library")
    def variants = isAndroidLibrary ? android.libraryVariants : android.applicationVariants
    variants.all { def variant ->

        def targetName = variant.name.capitalize()
        def targetPath = variant.dirName

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

        def jsBundleFile = file("$jsBundleDir/$bundleAssetName")
        def jsSourceMapsDir = file("$buildDir/generated/assets/react/release")
        def jsIntermediateSourceMapsDir = file("$buildDir/intermediates/sourcemaps/react/${targetPath}")
        def jsPackagerSourceMapFile = file("$jsIntermediateSourceMapsDir/${bundleAssetName}.packager.map")
        def jsCompilerSourceMapFile = file("$jsIntermediateSourceMapsDir/${bundleAssetName}.compiler.map")
        def jsOutputSourceMapFile = file("$jsSourceMapsDir/${bundleAssetName}.map")

        def nodeExecutableAndArgs = config.nodeExecutableAndArgs ?: ["node"]
        def cliPath = detectCliPath(config)

        def execCommand = []

        if (Os.isFamily(Os.FAMILY_WINDOWS)) {
            execCommand.addAll(["cmd", "/c", *nodeExecutableAndArgs, cliPath])
        } else {
            execCommand.addAll([*nodeExecutableAndArgs, cliPath])
        }

        def enableHermes = enableHermesForVariant(variant)

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

            doFirst {
                jsBundleDir.deleteDir()
                jsBundleDir.mkdirs()
                resourcesDir.deleteDir()
                resourcesDir.mkdirs()
                jsIntermediateSourceMapsDir.deleteDir()
                jsIntermediateSourceMapsDir.mkdirs()
                jsSourceMapsDir.deleteDir()
                jsSourceMapsDir.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)

            workingDir(reactRoot)

            def devEnabled = !(config."devDisabledIn${targetName}"
                || targetName.toLowerCase().contains("release"))

            commandLine("npx", "taro", "build", "--type", "rn", "--platform", "android", "--reset-cache")

            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")

        }

        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 ("$buildDir/intermediates")
                if (isAndroidLibrary) {
                    into ("library_assets/${variant.name}/out") {
                        from(jsBundleDir)
                    }
                } else {
                    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)
                    }

                    // Workaround for Android Gradle Plugin 3.4+ new asset directory
                    into ("merged_assets/${variant.name}/out") {
                        from(jsBundleDir)
                    }
                }
            }

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

            enabled(currentBundleTask.enabled)
            dependsOn(currentBundleTask)
        }


        // mergeResources task runs before the bundle file is copied to the intermediate asset directory from Android plugin 4.1+.
        // This ensures to copy the bundle file before mergeResources task starts
        def mergeResourcesTask = tasks.findByName("merge${targetName}Resources")
        mergeResourcesTask.dependsOn(currentAssetsCopyTask)

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

        // Delete the VM related libraries that this build doesn't need.
        // The application can manage this manually by setting 'enableVmCleanup: false'
        //
        // This should really be done by packaging all Hermes related libs into
        // two separate HermesDebug and HermesRelease AARs, but until then we'll
        // kludge it by deleting the .so files out of the /transforms/ directory.
        def isRelease = targetName.toLowerCase().contains("release")
        def libDir = "$buildDir/intermediates/transforms/"
        def vmSelectionAction = {
            fileTree(libDir).matching {
                if (enableHermes) {
                    // For Hermes, delete all the libjsc* files
                    include "**/libjsc*.so"

                    if (isRelease) {
                        // Reduce size by deleting the debugger/inspector
                        include '**/libhermes-inspector.so'
                        include '**/libhermes-executor-debug.so'
                    } else {
                        // Release libs take precedence and must be removed
                        // to allow debugging
                        include '**/libhermes-executor-release.so'
                    }
                } else {
                    // For JSC, delete all the libhermes* files
                    include "**/libhermes*.so"
                }
            }.visit { details ->
                def targetVariant = ".*/transforms/[^/]*/${targetPath}/.*"
                def path = details.file.getAbsolutePath().replace(File.separatorChar, '/' as char)
                if (path.matches(targetVariant) && details.file.isFile()) {
                    details.file.delete()
                }
            }
        }

        if (enableVmCleanup) {
            packageTask.doFirst(vmSelectionAction)
        }
    }
}