Configure Firebase appdistribution plugin

Author: bmarty

build.gradle

@@ -24,6 +24,7 @@ buildscript {
         classpath libs.gradle.gradlePlugin
         classpath libs.gradle.kotlinPlugin
         classpath libs.gradle.hiltPlugin
+        classpath 'com.google.firebase:firebase-appdistribution-gradle:3.0.2'
         classpath 'com.google.gms:google-services:4.3.13'
         classpath 'org.sonarsource.scanner.gradle:sonarqube-gradle-plugin:3.4.0.2513'
         classpath 'com.google.android.gms:oss-licenses-plugin:0.10.5'

vector/build.gradle

@@ -1,6 +1,7 @@
 import com.android.build.OutputFile
 
 apply plugin: 'com.android.application'
+apply plugin: 'com.google.firebase.appdistribution'
 apply plugin: 'com.google.android.gms.oss-licenses-plugin'
 apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-parcelize'
@@ -229,10 +230,10 @@ android {
             storePassword 'android'
         }
         nightly {
-            keyAlias project.property("signing.element.nightly.keyId")
-            keyPassword project.property("signing.element.nightly.keyPassword")
+            keyAlias System.env.ELEMENT_ANDROID_NIGHTLY_KEYID ?: project.property("signing.element.nightly.keyId")
+            keyPassword System.env.ELEMENT_ANDROID_NIGHTLY_KEYPASSWORD ?: project.property("signing.element.nightly.keyPassword")
             storeFile file('./signature/nightly.keystore')
-            storePassword project.property("signing.element.nightly.storePassword")
+            storePassword System.env.ELEMENT_ANDROID_NIGHTLY_STOREPASSWORD ?: project.property("signing.element.nightly.storePassword")
         }
         release {
             keyAlias project.property("signing.element.keyId")
@@ -285,6 +286,19 @@ android {
             resValue "color", "launcher_background", "#07007E"
             matchingFallbacks = ['release']
             signingConfig signingConfigs.nightly
+            firebaseAppDistribution {
+                artifactType = "APK"
+                // We upload the universal APK to fix this error:
+                // "App Distribution found more than 1 output file for this variant.
+                // Please contact [email protected] for help using APK splits with App Distribution."
+                artifactPath = "$rootDir/vector/build/outputs/apk/gplay/nightly/vector-gplay-universal-nightly.apk"
+                // This file will be generated by the GitHub action
+                releaseNotesFile = "CHANGES_NIGHTLY.md"
+                groups = "external-testers"
+                // This should not be required, but if I do not add the appId, I get this error:
+                // "App Distribution halted because it had a problem uploading the APK: [404] Requested entity was not found."
+                appId = "1:912726360885:android:efd8545af52a9f9300427c"
+            }
         }
     }