[Build, IGS] Add logging to InternalGradleSetupSettingsPlugin

#KTI-1223 In Progress

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

@@ -7,18 +7,26 @@ package org.jetbrains.kotlin.build
 
 import org.gradle.api.Plugin
 import org.gradle.api.initialization.Settings
+import org.gradle.api.logging.Logging
 import org.gradle.api.plugins.ExtensionAware
 import org.gradle.kotlin.dsl.extra
+import java.net.SocketTimeoutException
 import java.net.URL
+import java.net.UnknownHostException
 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> {
+    private val log = Logging.getLogger(javaClass)
+
     override fun apply(target: Settings) {
         val isTeamCityBuild = (target as? ExtensionAware)?.extra?.has("teamcity") == true || System.getenv("TEAMCITY_VERSION") != null
-        if (isTeamCityBuild) return
+        if (isTeamCityBuild) {
+            log.info("TeamCity build detected. Skipping automatic local.properties configuration")
+            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
@@ -27,15 +35,26 @@ abstract class InternalGradleSetupSettingsPlugin : Plugin<Settings> {
                 val modifier = LocalPropertiesModifier(rootDir.resolve("local.properties"))
                 val consentManager = ConsentManager(modifier)
                 val initialDecision = consentManager.getUserDecision()
-                if (initialDecision == false) return@thread // user has opted out
+                if (initialDecision == false) {
+                    log.debug("Skipping automatic local.properties configuration as you've opted out")
+                    return@thread
+                }
                 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
+                if (initialDecision == null && !consentManager.askForConsent()) {
+                    log.debug("Skipping automatic local.properties configuration as the consent wasn't given")
+                    return@thread
+                }
                 modifier.applySetup(setupFile)
-            } catch (_: Throwable) {
+                log.info("Automatic local.properties setup has been applied.")
-                // no-op
+            } catch (e: UnknownHostException) {
+                log.debug("Cannot connect to the internal properties storage", e)
+            } catch (e: SocketTimeoutException) {
+                log.debug("Cannot connect to the internal properties storage", e)
+            } catch (e: Throwable) {
+                log.warn("Something went wrong during the automatic local.properties setup attempt", e)
             }
         }
     }