Build 27: let the Android app build without upstream's private maven mirror

android/app/build.gradle

@@ -71,7 +71,9 @@ android {
     applicationVariants.all { variant ->
         def flavor = variant.productFlavors[0].name
 
-        if (flavor == "ci") {
+        // The ci branch reads the private-mirror properties at configuration time,
+        // which runs for every variant — only enter it when the mirror is configured.
+        if (flavor == "ci" && project.hasProperty("mavenHost")) {
             repositories {
                 maven {
                     credentials {

android/settings.gradle

@@ -1,29 +1,26 @@
 pluginManagement {
     repositories {
-        maven {
-            credentials {
-                username "$mavenUser"
-                password "$mavenPassword"
+        // Private mirror only when its coordinates are supplied (-PmavenHost=… as in upstream CI);
+        // everyone else resolves plugins from the public repositories.
+        def mavenHost = providers.gradleProperty("mavenHost")
+        if (mavenHost.present) {
+            def mavenUser = providers.gradleProperty("mavenUser").get()
+            def mavenPassword = providers.gradleProperty("mavenPassword").get()
+            ["gradle-plugin-portal", "google-maven", "maven-central"].each { repo ->
+                maven {
+                    credentials {
+                        username mavenUser
+                        password mavenPassword
+                    }
+                    url "${mavenHost.get()}/repository/${repo}/"
+                    allowInsecureProtocol = true
+                }
             }
-            url "$mavenHost/repository/gradle-plugin-portal/"
-            allowInsecureProtocol = true
-        }
-        maven {
-            credentials {
-                username "$mavenUser"
-                password "$mavenPassword"
-            }
-            url "$mavenHost/repository/google-maven/"
-            allowInsecureProtocol = true
-        }
-        maven {
-            credentials {
-                username "$mavenUser"
-                password "$mavenPassword"
-            }
-            url "$mavenHost/repository/maven-central/"
-            allowInsecureProtocol = true
+        } else {
+            gradlePluginPortal()
+            google()
+            mavenCentral()
         }
     }
 }
-include ':app'
+include ':app'