expo-updates/expo-updates.gradle

// Gradle script for downloading assets that make up an OTA update and bundling them into the APK

import org.apache.tools.ant.taskdefs.condition.Os
import org.gradle.util.GradleVersion

void runBefore(String dependentTaskName, Task task) {
  Task dependentTask = tasks.findByPath(dependentTaskName);
  if (dependentTask != null) {
    dependentTask.dependsOn task
  }
}

afterEvaluate {
  def projectRoot = file("../../")
  def inputExcludes = ["android/**", "ios/**"]

  android.applicationVariants.each { variant ->
    def folderName = variant.name
    def targetName = folderName.capitalize()

    def assetsDir = file("$buildDir/intermediates/merged_assets/${folderName}/out")

    GradleVersion gradleVersion = GradleVersion.current()
    if (gradleVersion < GradleVersion.version('5.0')) {
      assetsDir = file("$buildDir/intermediates/merged_assets/${folderName}/merge${targetName}Assets/out")
    }

    // Bundle task name for variant
    def bundleExpoAssetsTaskName = "bundle${targetName}ExpoUpdatesAssets"

    def currentBundleTask = tasks.create(
        name: bundleExpoAssetsTaskName,
        type: Exec) {
      description = "expo-updates: Bundle assets for ${targetName}."

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

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

      // Set up the call to exp
      workingDir projectRoot

      if (Os.isFamily(Os.FAMILY_WINDOWS)) {
        commandLine("cmd", "/c", ".\\node_modules\\expo-updates\\run-expo.bat", "bundle-assets", projectRoot, "--platform", "android", "--dest", assetsDir)
      } else {
        commandLine("./node_modules/expo-updates/run-expo.sh", "bundle-assets", projectRoot, "--platform", "android", "--dest", assetsDir)
      }

      enabled config."bundleIn${targetName}" || targetName.toLowerCase().contains("release")
    }

    currentBundleTask.dependsOn("merge${targetName}Resources")
    currentBundleTask.dependsOn("merge${targetName}Assets")

    runBefore("process${targetName}Resources", currentBundleTask)
  }
}