feat(amazonq): allow Amazon Q endpoint to be configured through the registry (#5318)

Author: rli

plugins/amazonq/codewhisperer/jetbrains-community/src/software/aws/toolkits/jetbrains/services/codewhisperer/util/CodeWhispererConstants.kt

@@ -6,6 +6,7 @@ package software.aws.toolkits.jetbrains.services.codewhisperer.util
 import com.intellij.openapi.actionSystem.DataKey
 import com.intellij.openapi.editor.markup.EffectType
 import com.intellij.openapi.editor.markup.TextAttributes
+import com.intellij.openapi.util.registry.Registry
 import com.intellij.ui.JBColor
 import software.amazon.awssdk.regions.Region
 import software.amazon.awssdk.services.codewhispererruntime.model.AccessDeniedException
@@ -154,7 +155,9 @@ object CodeWhispererConstants {
     }
 
     object Config {
-        const val CODEWHISPERER_ENDPOINT = "https://codewhisperer.us-east-1.amazonaws.com/" // PROD
+        val CODEWHISPERER_ENDPOINT
+            get() = Registry.get("amazon.q.endpoint").asString()
+
         const val CODEWHISPERER_IDPOOL_ID = "us-east-1:70717e99-906f-4add-908c-bd9074a2f5b9"
         val Sigv4ClientRegion = Region.US_EAST_1
         val BearerClientRegion = Region.US_EAST_1

plugins/amazonq/src/main/resources/META-INF/plugin.xml

@@ -83,6 +83,11 @@
     <incompatible-with>com.intellij.jetbrains.client</incompatible-with>
     <incompatible-with>com.intellij.gateway</incompatible-with>
 
+    <extensions defaultExtensionNs="com.intellij">
+        <registryKey key="amazon.q.endpoint" description="Endpoint to use for Amazon Q"
+                     defaultValue="https://codewhisperer.us-east-1.amazonaws.com/" restartRequired="true"/>
+    </extensions>
+
     <xi:include href="/META-INF/module-amazonq.xml" />
 
     <xi:include href="/META-INF/change-notes.xml" xpointer="xpointer(/idea-plugin/*)">