Migrate to JSpecify

.checkstyle/checkstyle.xml

@@ -102,6 +102,7 @@
     <!-- https://checkstyle.org/config_imports.html#IllegalImport -->
     <module name="IllegalImport">
       <property name="illegalPkgs" value="sun, jdk, com.sun"/>
+      <property name="illegalClasses" value="org.jetbrains.annotations.NotNull, org.jetbrains.annotations.Nullable" />
     </module>
 
     <!-- https://checkstyle.org/config_coding.html#IllegalTokenText -->

build.gradle.kts

@@ -53,7 +53,9 @@ tasks.jar {
 }
 
 dependencies {
-  implementation(libs.mammoth)
+  implementation(libs.mammoth) {
+    exclude(group = "org.jetbrains", module = "annotations")
+  }
   "workerClasspathCompileOnly"(libs.pebble)
   "workerClasspathCompileOnly"(libs.snakeyamlEngine)
   "workerClasspathCompileOnly"(workerShared.map { it.output })
@@ -62,7 +64,9 @@ dependencies {
   privateRuntime.name(workerShared.map { it.output })
   compileOnly(libs.ideaExtPlugin)
 
-  testImplementation(libs.mammoth.test)
+  testImplementation(libs.mammoth.test) {
+    exclude(group = "org.jetbrains", module = "annotations")
+  }
   testImplementation(platform(libs.junit.bom))
   testImplementation(libs.junit.api)
   testRuntimeOnly(libs.junit.engine)

gradle/libs.versions.toml

@@ -6,7 +6,7 @@ checkstyle = "10.26.1"
 ideaExt = "1.1.10"
 indra = "3.1.3"
 junit = "5.13.4"
-mammoth = "1.4.0"
+mammoth = "1.5.0"
 pebble = "3.2.4"
 snakeyaml = "2.9"
 spotless = "7.0.4"

src/main/java/net/kyori/blossom/Blossom.java

@@ -44,10 +44,10 @@
 import org.gradle.plugins.ide.eclipse.model.EclipseModel;
 import org.gradle.plugins.ide.idea.model.IdeaModel;
 import org.gradle.util.GradleVersion;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
 import org.jetbrains.gradle.ext.ProjectSettings;
 import org.jetbrains.gradle.ext.TaskTriggersConfig;
+import org.jspecify.annotations.NullMarked;
+import org.jspecify.annotations.Nullable;
 
 /**
  * A template processor for Gradle projects.
@@ -56,6 +56,7 @@
  *
  * @since 2.0.0
  */
+@NullMarked
 public class Blossom implements ProjectPlugin {
   private static final String GENERATION_GROUP = "blossom";
   private static final String EXTENSION_NAME = "blossom";
@@ -65,10 +66,10 @@ public class Blossom implements ProjectPlugin {
 
   @Override
   public void apply(
-    final @NotNull Project project,
-    final @NotNull PluginContainer plugins,
-    final @NotNull ExtensionContainer extensions,
-    final @NotNull TaskContainer tasks
+    final Project project,
+    final PluginContainer plugins,
+    final ExtensionContainer extensions,
+    final TaskContainer tasks
   ) {
     plugins.withType(JavaBasePlugin.class, $ -> {
       final SetProperty<File> outputDirs = project.getObjects().setProperty(File.class);
@@ -121,18 +122,18 @@ private void registerGenerateAllTask(final Project project, final TaskContainer
 
     IdeConfigurer.apply(project, new IdeConfigurer.IdeImportAction() {
       @Override
-      public void idea(final @NotNull Project project, final @NotNull IdeaModel idea, final @NotNull ProjectSettings ideaExtension) {
+      public void idea(final Project project, final IdeaModel idea, final ProjectSettings ideaExtension) {
         ((ExtensionAware) ideaExtension).getExtensions().getByType(TaskTriggersConfig.class).afterSync(generateTemplates);
         project.afterEvaluate(p -> {
-          final @Nullable IdeaModel projectIdea = p.getExtensions().getByType(IdeaModel.class);
+          final IdeaModel projectIdea = p.getExtensions().getByType(IdeaModel.class);
           if (projectIdea.getModule() != null) {
             projectIdea.getModule().getGeneratedSourceDirs().addAll(outputDirs.get());
           }
         });
       }
 
       @Override
-      public void eclipse(final @NotNull Project project, final @NotNull EclipseModel eclipse) {
+      public void eclipse(final Project project, final EclipseModel eclipse) {
         eclipse.synchronizationTasks(generateTemplates);
       }
     });

src/main/java/net/kyori/blossom/BlossomExtension.java

@@ -24,7 +24,7 @@
 import org.gradle.api.Action;
 import org.gradle.api.NamedDomainObjectProvider;
 import org.gradle.api.PolymorphicDomainObjectContainer;
-import org.jetbrains.annotations.NotNull;
+import org.jspecify.annotations.NullMarked;
 
 import static java.util.Objects.requireNonNull;
 
@@ -35,6 +35,7 @@
  *
  * @since 2.0.0
  */
+@NullMarked
 public interface BlossomExtension {
   String RESOURCE_TEMPLATE_SET_NAME = "resource";
   String GROOVY_SOURCES_TEMPLATE_SET_NAME = "groovy";
@@ -48,7 +49,7 @@ public interface BlossomExtension {
    * @return the resource template set for configuration
    * @since 2.0.0
    */
-  default @NotNull NamedDomainObjectProvider<ResourceTemplateSet> resources() {
+  default NamedDomainObjectProvider<ResourceTemplateSet> resources() {
     return this.customResources(RESOURCE_TEMPLATE_SET_NAME);
   }
 
@@ -58,7 +59,7 @@ public interface BlossomExtension {
    * @param configureAction the action to perform on the primary resource template set
    * @since 2.0.0
    */
-  default void resources(final @NotNull Action<? super ResourceTemplateSet> configureAction) {
+  default void resources(final Action<? super ResourceTemplateSet> configureAction) {
     this.resources().configure(requireNonNull(configureAction, "configureAction"));
   }
 
@@ -71,7 +72,7 @@ default void resources(final @NotNull Action<? super ResourceTemplateSet> config
    * @return the resource template set for configuration
    * @since 2.1.0
    */
-  default @NotNull NamedDomainObjectProvider<ResourceTemplateSet> customResources(final @NotNull String setName) {
+  default NamedDomainObjectProvider<ResourceTemplateSet> customResources(final String setName) {
     requireNonNull(setName, "setName");
     if (this.getTemplateSets().getNames().contains(setName)) {
       return this.getTemplateSets().named(setName, ResourceTemplateSet.class);
@@ -89,7 +90,7 @@ default void resources(final @NotNull Action<? super ResourceTemplateSet> config
    * @param configureAction the action to perform on the primary resource template set
    * @since 2.1.0
    */
-  default void customResources(final @NotNull String setName, final @NotNull Action<? super ResourceTemplateSet> configureAction) {
+  default void customResources(final String setName, final Action<? super ResourceTemplateSet> configureAction) {
     this.customResources(setName).configure(requireNonNull(configureAction, "configureAction"));
   }
 
@@ -109,7 +110,7 @@ private NamedDomainObjectProvider<SourceTemplateSet> registerSourceTemplateSet(f
    * @return the groovy source template set.
    * @since 2.0.0
    */
-  default @NotNull NamedDomainObjectProvider<SourceTemplateSet> groovySources() {
+  default NamedDomainObjectProvider<SourceTemplateSet> groovySources() {
     return this.registerSourceTemplateSet(GROOVY_SOURCES_TEMPLATE_SET_NAME, SourceTemplateSet::groovy);
   }
 
@@ -121,7 +122,7 @@ private NamedDomainObjectProvider<SourceTemplateSet> registerSourceTemplateSet(f
    * @param configureAction the action to configure the set with
    * @since 2.0.0
    */
-  default void groovySources(final @NotNull Action<? super SourceTemplateSet> configureAction) {
+  default void groovySources(final Action<? super SourceTemplateSet> configureAction) {
     this.registerSourceTemplateSet(GROOVY_SOURCES_TEMPLATE_SET_NAME, SourceTemplateSet::groovy).configure(requireNonNull(configureAction, "configureAction"));
   }
 
@@ -133,7 +134,7 @@ default void groovySources(final @NotNull Action<? super SourceTemplateSet> conf
    * @return the java source template set.
    * @since 2.0.0
    */
-  default @NotNull NamedDomainObjectProvider<SourceTemplateSet> javaSources() {
+  default NamedDomainObjectProvider<SourceTemplateSet> javaSources() {
     return this.registerSourceTemplateSet(JAVA_SOURCES_TEMPLATE_SET_NAME, SourceTemplateSet::java);
   }
 
@@ -145,7 +146,7 @@ default void groovySources(final @NotNull Action<? super SourceTemplateSet> conf
    * @param configureAction the action to configure the set with
    * @since 2.0.0
    */
-  default void javaSources(final @NotNull Action<? super SourceTemplateSet> configureAction) {
+  default void javaSources(final Action<? super SourceTemplateSet> configureAction) {
     this.registerSourceTemplateSet(JAVA_SOURCES_TEMPLATE_SET_NAME, SourceTemplateSet::java).configure(requireNonNull(configureAction, "configureAction"));
   }
 
@@ -157,7 +158,7 @@ default void javaSources(final @NotNull Action<? super SourceTemplateSet> config
    * @return the kotlin source template set.
    * @since 2.0.0
    */
-  default @NotNull NamedDomainObjectProvider<SourceTemplateSet> kotlinSources() {
+  default NamedDomainObjectProvider<SourceTemplateSet> kotlinSources() {
     return this.registerSourceTemplateSet(KOTLIN_SOURCES_TEMPLATE_SET_NAME, SourceTemplateSet::kotlin);
   }
 
@@ -169,7 +170,7 @@ default void javaSources(final @NotNull Action<? super SourceTemplateSet> config
    * @param configureAction the action to configure the set with
    * @since 2.0.0
    */
-  default void kotlinSources(final @NotNull Action<? super SourceTemplateSet> configureAction) {
+  default void kotlinSources(final Action<? super SourceTemplateSet> configureAction) {
     this.registerSourceTemplateSet(KOTLIN_SOURCES_TEMPLATE_SET_NAME, SourceTemplateSet::kotlin).configure(requireNonNull(configureAction, "configureAction"));
   }
 
@@ -181,7 +182,7 @@ default void kotlinSources(final @NotNull Action<? super SourceTemplateSet> conf
    * @return the scala source template set.
    * @since 2.0.0
    */
-  default @NotNull NamedDomainObjectProvider<SourceTemplateSet> scalaSources() {
+  default NamedDomainObjectProvider<SourceTemplateSet> scalaSources() {
     return this.registerSourceTemplateSet(SCALA_SOURCES_TEMPLATE_SET_NAME, SourceTemplateSet::scala);
   }
 
@@ -193,7 +194,7 @@ default void kotlinSources(final @NotNull Action<? super SourceTemplateSet> conf
    * @param configureAction the action to configure the set with
    * @since 2.0.0
    */
-  default void scalaSources(final @NotNull Action<? super SourceTemplateSet> configureAction) {
+  default void scalaSources(final Action<? super SourceTemplateSet> configureAction) {
     this.registerSourceTemplateSet(SCALA_SOURCES_TEMPLATE_SET_NAME, SourceTemplateSet::scala).configure(requireNonNull(configureAction, "configureAction"));
   }
 
@@ -209,7 +210,7 @@ default void scalaSources(final @NotNull Action<? super SourceTemplateSet> confi
    * @return the source template set
    * @since 2.1.0
    */
-  default @NotNull NamedDomainObjectProvider<SourceTemplateSet> customSources(final @NotNull String setName, final @NotNull Action<? super SourceTemplateSet> configureAction) {
+  default NamedDomainObjectProvider<SourceTemplateSet> customSources(final String setName, final Action<? super SourceTemplateSet> configureAction) {
     requireNonNull(setName, "setName");
     final NamedDomainObjectProvider<SourceTemplateSet> setProvider;
     if (this.getTemplateSets().getNames().contains(setName)) {
@@ -221,22 +222,21 @@ default void scalaSources(final @NotNull Action<? super SourceTemplateSet> confi
     return setProvider;
   }
 
-
   /**
    * Get all currently registered template sets for this source set.
    *
    * @return the template sets
    * @since 2.0.0
    */
-  @NotNull PolymorphicDomainObjectContainer<TemplateSet> getTemplateSets();
+  PolymorphicDomainObjectContainer<TemplateSet> getTemplateSets();
 
   /**
    * Configure template sets that apply to this source set.
    *
    * @param configurer the action to perform
    * @since 2.0.0
    */
-  default void templateSets(final @NotNull Action<PolymorphicDomainObjectContainer<TemplateSet>> configurer) {
+  default void templateSets(final Action<PolymorphicDomainObjectContainer<TemplateSet>> configurer) {
     Configurable.configure(this.getTemplateSets(), configurer);
   }
 }

src/main/java/net/kyori/blossom/GenerateTemplates.java

@@ -39,13 +39,14 @@
 import org.gradle.api.tasks.SkipWhenEmpty;
 import org.gradle.api.tasks.TaskAction;
 import org.gradle.workers.WorkerExecutor;
-import org.jetbrains.annotations.NotNull;
+import org.jspecify.annotations.NullMarked;
 
 /**
  * Generate real files based on templates and input parameters.
  *
  * @since 2.0.0
  */
+@NullMarked
 public abstract class GenerateTemplates extends DefaultTask {
 
   /**
@@ -55,7 +56,7 @@ public abstract class GenerateTemplates extends DefaultTask {
    * @since 2.0.0
    */
   @Nested
-  public abstract @NotNull Property<TemplateSet> getBaseSet();
+  public abstract Property<TemplateSet> getBaseSet();
 
   /**
    * Files that can be included in templates, but that are not themselves templates.
@@ -66,7 +67,7 @@ public abstract class GenerateTemplates extends DefaultTask {
    * @since 2.0.0
    */
   @InputFiles
-  protected abstract @NotNull ConfigurableFileCollection getIncludesDirectories();
+  protected abstract ConfigurableFileCollection getIncludesDirectories();
 
   /**
    * Source directory for templates to process.
@@ -76,7 +77,7 @@ public abstract class GenerateTemplates extends DefaultTask {
    */
   @InputFiles
   @SkipWhenEmpty
-  protected abstract @NotNull ConfigurableFileCollection getSourceDirectories();
+  protected abstract ConfigurableFileCollection getSourceDirectories();
 
   /**
    * Destination directory for template output.
@@ -85,7 +86,7 @@ public abstract class GenerateTemplates extends DefaultTask {
    * @since 2.0.0
    */
   @OutputDirectory
-  public abstract @NotNull DirectoryProperty getOutputDir();
+  public abstract DirectoryProperty getOutputDir();
 
   /**
    * The worker classpath. This should include Pebble and SnakeYAML engine.

src/main/java/net/kyori/blossom/ResourceTemplateSet.java

@@ -20,10 +20,13 @@
  */
 package net.kyori.blossom;
 
+import org.jspecify.annotations.NullMarked;
+
 /**
  * A template set type targeting resources.
  *
  * @since 2.0.0
  */
+@NullMarked
 public interface ResourceTemplateSet extends TemplateSet {
 }

src/main/java/net/kyori/blossom/SourceTemplateSet.java

@@ -20,13 +20,14 @@
  */
 package net.kyori.blossom;
 
-import org.jetbrains.annotations.NotNull;
+import org.jspecify.annotations.NullMarked;
 
 /**
  * A template set for sources.
  *
  * @since 2.0.0
  */
+@NullMarked
 public interface SourceTemplateSet extends TemplateSet {
   /**
    * Configure to generate templates contributing to Groovy sources.
@@ -68,5 +69,5 @@ default void scala() {
    * @param name the name of the language extension
    * @since 2.0.0
    */
-  void namedLanguageExtension(final @NotNull String name);
+  void namedLanguageExtension(final String name);
 }