feat:(Core) prevents Amplify.configure while running for SwiftUI Previews (#1509)

* feat:(Core) prevents `Amplify.configure` while running for SwiftUI Previews

Author: brennanMKE

Amplify/Core/Configuration/AmplifyConfiguration.swift

@@ -95,6 +95,10 @@ extension Amplify {
     ///
     /// - Parameter configuration: The AmplifyConfiguration for specified Categories
     public static func configure(_ configuration: AmplifyConfiguration? = nil) throws {
+        guard !isRunningForSwiftUIPreviews else {
+            log.info("Running for SwiftUI reviews, skipping configuration.")
+            return
+        }
         log.info("Configuring")
         log.debug("Configuration: \(String(describing: configuration))")
         guard !isConfigured else {
@@ -178,4 +182,9 @@ extension Amplify {
         }
     }
 
+    //// Indicates is the runtime is for SwiftUI Previews
+    private static var isRunningForSwiftUIPreviews: Bool {
+        ProcessInfo.processInfo.environment["XCODE_RUNNING_FOR_PREVIEWS"] != nil
+    }
+
 }

CHANGELOG.md

@@ -1,6 +1,11 @@
 # Changelog
 ## Unreleased
 
+### Features
+
+- **Core**: Supports SwiftUI by not running `Amplify.configure` while running for Previews #1509
+
+
 ## 1.16.1 (2021-11-19)
 
 ## 1.16.0 (2021-11-18)