fixes #530: Disable logback-core in Java 8 and show warning messages

build.sbt

@@ -83,9 +83,7 @@ lazy val sbtSonatype =
       libraryDependencies ++= Seq(
         "org.sonatype.spice.zapper" % "spice-zapper"  % versions.sonatypeZapperClient,
         "org.wvlet.airframe"       %% "airframe-http" % versions.airframe
-        // Logback 1.5.8 dropposed Java 8 support
-          exclude ("ch.qos.logback", "logback-core")
-          // A workaround for sbt-pgp, which still depends on scala-parser-combinator 1.x
+        // A workaround for sbt-pgp, which still depends on scala-parser-combinator 1.x
           excludeAll (ExclusionRule("org.scala-lang.modules", "scala-parser-combinators_2.12")),
         "org.wvlet.airframe"            %% "airspec"                           % versions.airframe % Test,
         "com.lumidion"                  %% "sonatype-central-client-sttp-core" % versions.sonatypeClient,

src/main/scala/xerial/sbt/sonatype/SonatypeClient.scala

@@ -39,10 +39,10 @@ class SonatypeClient(
 
   @nowarn("msg=URLConnectionClientBackend")
   private[sonatype] val clientConfig = {
-    Http.client
+    var config = Http.client
       .withName("sonatype-client")
-      // Put the log file under target/sbt-sonatype directory
-      .withLoggerConfig(_.withLogFileName("target/sbt-sonatype/sonatype_client_logs.json"))
+      // TODO Enable client-side logging while avoiding Java8 compatibility of log-rotator (logback-core 1.5.x)
+      .noLogging
       // Disables the circuit breaker, because Sonatype can be down for a long time https://github.com/xerial/sbt-sonatype/issues/363
       .noCircuitBreaker
       // Use URLConnectionClient for JDK8 compatibility. Remove this line when using JDK11 or later
@@ -62,6 +62,20 @@ class SonatypeClient(
           .withAccept(MediaType.ApplicationJson)
           .withHeader(HttpHeader.Authorization, s"Basic ${base64Credentials}")
       }
+
+    val javaVersion = sys.props.getOrElse("java.version", "unknown")
+    if (javaVersion.startsWith("1.")) {
+      warn(
+        s"Disabled http client logging as Java version ${javaVersion} is no longer supported. Please use Java 17 or later."
+      )
+      config = config.noLogging
+    } else {
+      // Put the log file under target/sbt-sonatype directory
+      config = config.withLoggerConfig {
+        _.withLogFileName("target/sbt-sonatype/sonatype_client_logs.json")
+      }
+    }
+    config
   }
 
   private[sonatype] val httpClient = clientConfig.newSyncClient(repoUri.toString)

src/test/scala/xerial/sbt/sonatype/SonatypeClientTest.scala

@@ -24,6 +24,11 @@ class SonatypeClientTest extends AirSpec {
     profile shouldBe unpacked
   }
 
+  test("build client") {
+    val client = new SonatypeClient("https://oss.sonatype.org/service/local/", Seq.empty, "")
+    client.httpClient
+  }
+
 //  test("create client") {
 //    val client = new SonatypeClient("https://httpbin.org/", Seq.empty, "")
 //    client.httpClient.readAs[Json](Http.GET("/status/500"))