[Build, IGS] Implement InternalGradleSetupSettingsPlugin

#KTI-1223 In Progress

repo/gradle-settings-conventions/internal-gradle-setup/src/main/kotlin/InternalGradleSetupSettingsPlugin.kt

@@ -7,8 +7,36 @@ package org.jetbrains.kotlin.build
 
 import org.gradle.api.Plugin
 import org.gradle.api.initialization.Settings
+import org.gradle.api.plugins.ExtensionAware
+import org.gradle.kotlin.dsl.extra
+import java.net.URL
+import kotlin.concurrent.thread
+
+private const val DOMAIN_NAME = "kotlin-build-properties.labs.jb.gg"
+private const val SETUP_JSON_URL = "https://$DOMAIN_NAME/setup.json"
 
 abstract class InternalGradleSetupSettingsPlugin : Plugin<Settings> {
     override fun apply(target: Settings) {
+        val isTeamCityBuild = (target as? ExtensionAware)?.extra?.has("teamcity") == true || System.getenv("TEAMCITY_VERSION") != null
+        if (isTeamCityBuild) return
+        val rootDir = target.rootDir
+        // invoke this logic in a separate thread to not pause the build
+        // the properties will be configured for the future builds
+        thread {
+            try {
+                val modifier = LocalPropertiesModifier(rootDir.resolve("local.properties"))
+                val consentManager = ConsentManager(modifier)
+                val initialDecision = consentManager.getUserDecision()
+                if (initialDecision == false) return@thread // user has opted out
+                val connection = URL(SETUP_JSON_URL).run { openConnection().apply { connectTimeout = 300 } }
+                val setupFile = connection.getInputStream().buffered().use {
+                    parseSetupFile(it)
+                }
+                if (initialDecision == null && !consentManager.askForConsent()) return@thread
+                modifier.applySetup(setupFile)
+            } catch (_: Throwable) {
+                // no-op
+            }
+        }
     }
 }