Enable desugaring of java 8+ feature for android < 24 (#509)

Co-authored-by: Joaquim Stähli <[email protected]>
Co-authored-by: Gaëtan Muller <[email protected]>

Author: 3 people

build-logic/plugins/src/main/java/ch/srgssr/pillarbox/gradle/internal/ProjectExtensions.kt

@@ -6,6 +6,7 @@ package ch.srgssr.pillarbox.gradle.internal
 
 import com.android.build.api.dsl.CommonExtension
 import org.gradle.api.Project
+import org.gradle.kotlin.dsl.dependencies
 import org.gradle.kotlin.dsl.withType
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
@@ -20,12 +21,18 @@ internal fun Project.configureAndroidModule(extension: CommonExtension<*, *, *,
     compileOptions {
         sourceCompatibility = AppConfig.javaVersion
         targetCompatibility = AppConfig.javaVersion
+        isCoreLibraryDesugaringEnabled = true
     }
 
     buildFeatures {
         resValues = false
         shaders = false
     }
+
+    dependencies {
+        // coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:2.0.4")
+        add("coreLibraryDesugaring", "com.android.tools:desugar_jdk_libs:2.0.4")
+    }
 }
 
 internal fun configureComposeModule(extension: CommonExtension<*, *, *, *, *, *>) = with(extension) {

docs/README.md

@@ -106,6 +106,22 @@ kotlinOptions {
 }
 ```
 
+### Support Android API < 24
+
+If your min SDK version is below 24, you have to enabled library desugaring as describe in the [Android documentation](https://developer.android.com/studio/write/java8-support#library-desugaring):
+
+```kotlin
+compileOptions {
+    sourceCompatibility = JavaVersion.VERSION_17
+    targetCompatibility = JavaVersion.VERSION_17
+    isCoreLibraryDesugaringEnabled = true
+}
+
+dependencies {
+    coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:2.0.4")
+}
+```
+
 ### Integrate Pillarbox
 
 To start using Pillarbox in your project, you can check each module's documentation: