feat: AndroidShowDeprecations preference flag (#1822)

Author: breautek

lib/prepare.js

@@ -113,7 +113,8 @@ function getUserGradleConfig (configXml) {
         { xmlKey: 'GradlePluginKotlinEnabled', gradleKey: 'IS_GRADLE_PLUGIN_KOTLIN_ENABLED', type: Boolean },
         { xmlKey: 'AndroidJavaSourceCompatibility', gradleKey: 'JAVA_SOURCE_COMPATIBILITY', type: Number },
         { xmlKey: 'AndroidJavaTargetCompatibility', gradleKey: 'JAVA_TARGET_COMPATIBILITY', type: Number },
-        { xmlKey: 'AndroidKotlinJVMTarget', gradleKey: 'KOTLIN_JVM_TARGET', type: String }
+        { xmlKey: 'AndroidKotlinJVMTarget', gradleKey: 'KOTLIN_JVM_TARGET', type: String },
+        { xmlKey: 'AndroidShowDeprecations', gradleKey: 'JAVA_SHOW_DEPRECATIONS', type: Boolean }
     ];
 
     return configXmlToGradleMapping.reduce((config, mapping) => {

templates/project/build.gradle

@@ -40,6 +40,18 @@ allprojects {
     }
 
     repositories repos
+
+    subprojects {
+        afterEvaluate {
+            tasks.withType(JavaCompile).tap {
+                configureEach {
+                    if (cordovaConfig.JAVA_SHOW_DEPRECATIONS == true) {
+                        options.compilerArgs += "-Xlint:deprecation"
+                    }
+                }
+            }
+        }
+    }
 }
 
 task clean(type: Delete) {