[SHARED] Read API_BASE_URL from local gradle.properties

you can pass API_BASE_URL to gradle script for on CI e.g.

Author: moallemi

README.md

@@ -48,6 +48,14 @@ Multiplatform project and also to help someone just starting to explore KMP for
 * The iOS code can be modified or built by opening `iosApp/KmpShowcase.xcodeproj` in Xcode.
 * Running `./gradlew server:run` will deploy the server to localhost on port 8080.
 
+Once you setup the project, you might want to change server address in your `~/.gradle/gradle.properties`:
+
+```
+KMP_SHOWCASE_API_BASE_URL_DEFAULT=<insert> // default: http://localhost:9090
+KMP_SHOWCASE_API_BASE_URL_ANDROID=<insert> // default: http://10.0.2.2:9090
+KMP_SHOWCASE_API_BASE_URL_IOS=<insert> // default: http://127.0.0.1:9090
+```
+
 ## Contributions
 
 If you've found an error in this sample, please file an issue.

shared/buildKonfig.gradle

@@ -3,16 +3,21 @@ buildkonfig {
 
     // default config is required
     defaultConfigs {
-        buildConfigField 'STRING', 'API_BASE_URL', 'http://localhost:9090'
+        buildConfigField 'STRING', 'API_BASE_URL', getProperty('KMP_SHOWCASE_API_BASE_URL_DEFAULT', 'http://localhost:9090')
     }
 
     targetConfigs {
         android {
-            buildConfigField 'STRING', 'API_BASE_URL', 'http://10.0.2.2:9090'
+            buildConfigField 'STRING', 'API_BASE_URL', getProperty('KMP_SHOWCASE_API_BASE_URL_ANDROID', 'http://10.0.2.2:9090')
         }
 
         ios {
-            buildConfigField 'STRING', 'API_BASE_URL', 'http://127.0.0.1:9090'
+            buildConfigField 'STRING', 'API_BASE_URL', getProperty('KMP_SHOWCASE_API_BASE_URL_IOS', 'http://127.0.0.1:9090')
         }
     }
+}
+
+Object getProperty(String propertyName, Object defaultValue) {
+    def propertyValue = project.properties[propertyName]
+    return propertyValue != null ? propertyValue : defaultValue
 }