Actually make Kotlin 1.7 work, for really-reals.

bom/application/pom.xml

@@ -148,7 +148,7 @@
         <aws-lambda-java-events.version>3.11.0</aws-lambda-java-events.version>
         <aws-xray.version>2.11.2</aws-xray.version>
         <azure-functions-java-library.version>1.4.2</azure-functions-java-library.version>
-        <kotlin.version>1.6.21</kotlin.version>
+        <kotlin.version>1.7.10</kotlin.version>
         <kotlin.coroutine.version>1.6.4</kotlin.coroutine.version>
         <kotlin-serialization.version>1.3.3</kotlin-serialization.version>
         <kubernetes-client.version>5.12.3</kubernetes-client.version> <!-- Please check with Java Operator SDK team before updating -->

build-parent/pom.xml

@@ -20,8 +20,8 @@
         <!-- These properties are needed in order for them to be resolvable by the generated projects -->
         <!-- Quarkus uses jboss-parent and it comes with 3.8.1-jboss-1, we don't want that in the templates -->
         <compiler-plugin.version>3.8.1</compiler-plugin.version>
-        <kotlin.version>1.6.21</kotlin.version>
-        <dokka.version>1.6.21</dokka.version>
+        <kotlin.version>1.7.10</kotlin.version>
+        <dokka.version>1.7.10</dokka.version>
         <scala.version>2.13.8</scala.version>
         <scala-maven-plugin.version>4.7.1</scala-maven-plugin.version>
         <!-- not pretty but this is used in the codestarts and we don't want to break compatibility -->

devtools/gradle/gradle-model/build.gradle

@@ -1,5 +1,6 @@
 dependencies {
     implementation "io.quarkus:quarkus-core-deployment:${version}"
+    implementation "org.jetbrains.kotlin:kotlin-gradle-plugin-api:${kotlin_version}"
     testImplementation "io.quarkus:quarkus-devtools-testing:${version}"
 }
 
@@ -27,4 +28,4 @@ publishing {
             from components.java
         }
     }
-}
+}

devtools/gradle/gradle-model/src/main/java/io/quarkus/gradle/tooling/GradleApplicationModelBuilder.java

@@ -30,6 +30,7 @@
 import org.gradle.api.tasks.compile.AbstractCompile;
 import org.gradle.language.jvm.tasks.ProcessResources;
 import org.gradle.tooling.provider.model.ParameterizedToolingModelBuilder;
+import org.jetbrains.kotlin.gradle.tasks.KotlinJvmCompile;
 
 import io.quarkus.bootstrap.BootstrapConstants;
 import io.quarkus.bootstrap.model.ApplicationModel;
@@ -436,6 +437,7 @@ private static void initProjectModule(Project project, WorkspaceModule.Mutable m
 
         final List<SourceDir> sourceDirs = new ArrayList<>(1);
         final List<SourceDir> resourceDirs = new ArrayList<>(1);
+
         project.getTasks().withType(AbstractCompile.class, t -> {
             if (!t.getEnabled()) {
                 return;
@@ -448,19 +450,45 @@ private static void initProjectModule(Project project, WorkspaceModule.Mutable m
             if (!allClassesDirs.contains(destDir)) {
                 return;
             }
-            final List<File> srcDirs = new ArrayList<>(1);
             source.visit(a -> {
                 // we are looking for the root dirs containing sources
                 if (a.getRelativePath().getSegments().length == 1) {
                     final File srcDir = a.getFile().getParentFile();
-                    if (srcDirs.add(srcDir)) {
+                    DefaultSourceDir sources = new DefaultSourceDir(srcDir.toPath(), destDir.toPath(),
+                            Collections.singletonMap("compiler", t.getName()));
+                    sourceDirs.add(sources);
+                }
+            });
+        });
+
+        // This "try/catch" is needed because of the way the "quarkus-cli" Gradle tests work. Without it, the tests fail.
+        try {
+            Class.forName("org.jetbrains.kotlin.gradle.tasks.KotlinJvmCompile");
+            project.getTasks().withType(KotlinJvmCompile.class, t -> {
+                if (!t.getEnabled()) {
+                    return;
+                }
+                final FileTree source = t.getSources().getAsFileTree();
+                if (source.isEmpty()) {
+                    return;
+                }
+                final File destDir = t.getDestinationDirectory().getAsFile().get();
+                if (!allClassesDirs.contains(destDir)) {
+                    return;
+                }
+                source.visit(a -> {
+                    // we are looking for the root dirs containing sources
+                    if (a.getRelativePath().getSegments().length == 1) {
+                        final File srcDir = a.getFile().getParentFile();
                         DefaultSourceDir sources = new DefaultSourceDir(srcDir.toPath(), destDir.toPath(),
                                 Collections.singletonMap("compiler", t.getName()));
                         sourceDirs.add(sources);
                     }
-                }
+                });
             });
-        });
+        } catch (ClassNotFoundException e) {
+            // ignore
+        }
 
         final File resourcesOutputDir = sourceSet.getOutput().getResourcesDir();
 
@@ -476,14 +504,11 @@ private static void initProjectModule(Project project, WorkspaceModule.Mutable m
                 return;
             }
             final Path destDir = t.getDestinationDir().toPath();
-            final List<File> srcDirs = new ArrayList<>(1);
             source.getAsFileTree().visit(a -> {
                 // we are looking for the root dirs containing sources
                 if (a.getRelativePath().getSegments().length == 1) {
                     final File srcDir = a.getFile().getParentFile();
-                    if (srcDirs.add(srcDir)) {
-                        resourceDirs.add(new DefaultSourceDir(srcDir.toPath(), destDir));
-                    }
+                    resourceDirs.add(new DefaultSourceDir(srcDir.toPath(), destDir));
                 }
             });
         });

devtools/gradle/gradle.properties

@@ -1 +1,2 @@
-version = 999-SNAPSHOT
+version = 999-SNAPSHOT
+kotlin_version = 1.7.10

independent-projects/arc/tests/pom.xml

@@ -48,7 +48,7 @@
         <dependency>
             <groupId>org.jetbrains.kotlin</groupId>
             <artifactId>kotlin-stdlib</artifactId>
-            <version>1.6.21</version>
+            <version>1.7.10</version>
             <scope>test</scope>
         </dependency>