Target java 8

bridge/src/main/java/com/github/sbt/avro/AvroCompilerBridge.java

@@ -127,7 +127,7 @@ public void compileAvscs(AvroFileRef[] avscs, File target) throws Exception {
             System.out.println("Compiling Avro schema: " + ref.getFile());
             files.add(ref);
         }
-        compiler.compileFiles(Set.of(avscs), target);
+        compiler.compileFiles(files, target);
     }
 
     @Override

bridge/src/main/java/com/github/sbt/avro/AvscFilesCompiler.java

@@ -56,7 +56,14 @@ public void compileFiles(Set<AvroFileRef> files, File outputDirectory) {
 
     if (!uncompiledFiles.isEmpty()) {
       String failedFiles = uncompiledFiles.stream()
-          .flatMap(f -> Stream.ofNullable(compileExceptions.get(f)).map(e -> f.getFile().getName() + ": " + e.getMessage()))
+          .flatMap(f -> {
+            Exception e = compileExceptions.get(f);
+            if (e == null) {
+              return Stream.empty();
+            } else {
+              return Stream.of(f.getFile().getName() + ": " + e.getMessage());
+            }
+          })
           .collect(Collectors.joining(",\n"));
 
       throw new SchemaGenerationException("Can not compile schema files:\n" + failedFiles);
@@ -87,7 +94,14 @@ public void compileClasses(Set<Class<? extends SpecificRecord>> classes, File ou
     if (!uncompiledClasses.isEmpty()) {
       String failedClasses = uncompiledClasses.stream()
               .map(Class::toString)
-              .flatMap(c -> Stream.ofNullable(compileExceptions.get(c)).map(e -> c + ": " + e.getMessage()))
+              .flatMap(c -> {
+                Exception e = compileExceptions.get(c);
+                if (e == null) {
+                  return Stream.empty();
+                } else {
+                  return Stream.of(c + ": " + e.getMessage());
+                }
+              })
               .collect(Collectors.joining(",\n"));
       throw new SchemaGenerationException("Can not re-compile classes:\n" + failedClasses);
     }

build.sbt

@@ -60,6 +60,10 @@ ThisBuild / githubWorkflowPublish := Seq(
   )
 )
 
+// compilers
+ThisBuild / javacOptions ++= Seq("--release", "8")
+ThisBuild / scalacOptions ++= Seq("-release", "8")
+
 lazy val `sbt-avro-parent`: Project = project
   .in(file("."))
   .settings(
@@ -113,7 +117,6 @@ lazy val `sbt-avro`: Project = project
     },
     buildInfoKeys := Seq[BuildInfoKey](name, version),
     buildInfoPackage := "com.github.sbt.avro",
-    Compile / scalacOptions ++= Seq("-deprecation"),
     scriptedLaunchOpts ++= Seq(
       "-Xmx1024M",
       "-Dplugin.version=" + version.value

plugin/src/main/scala/com/github/sbt/avro/SbtAvro.scala

@@ -224,7 +224,6 @@ object SbtAvro extends AutoPlugin {
 
                 // TODO Cache class loader
                 val avroClassLoader = new URLClassLoader(
-                  "AvroClassLoader",
                   (Avro / dependencyClasspath).value
                     .map(toNioPath)
                     .map(_.toUri.toURL)