More sketching of gradle plugin and related cli.

cli/build.gradle

@@ -1,6 +1,5 @@
 plugins {
     id 'GroowtConventions'
-    id 'application'
     id 'com.jessebrault.jbarchiva' version '0.1.0'
     id 'maven-publish'
 }
@@ -8,14 +7,27 @@ plugins {
 group = 'groowt'
 version = '0.1.0'
 
-application {
-    mainClass = 'groowt.cli.GroowtCli'
+repositories {
+    maven {
+        url 'https://repo.gradle.org/gradle/libs-releases'
+    }
+}
+
+dependencies {
+    implementation libs.gradle.tooling, libs.picocli, project(':groowt-gradle-model')
 }
 
 tasks.named('jar', Jar) {
     manifest {
         attributes('Main-Class': 'groowt.cli.GroowtCli')
     }
+    from sourceSets.main.runtimeClasspath.filter(File.&exists).collect { it.isDirectory() ? it : zipTree(it) }
+    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+    dependsOn ':groowt-gradle-model:jar'
+}
+
+tasks.withType(GenerateModuleMetadata) {
+    enabled = false
 }
 
 publishing {
@@ -23,6 +35,13 @@ publishing {
         create('groowtCli', MavenPublication) {
             artifactId = 'groowt-cli'
             from components.java
+            pom {
+                withXml {
+                    def rootNode = asNode()
+                    def dependenciesNode = rootNode.get('dependencies')
+                    rootNode.remove(dependenciesNode)
+                }
+            }
         }
     }
 }

cli/src/main/java/groowt/cli/Generate.java

@@ -0,0 +1,62 @@
+package groowt.cli;
+
+import groowt.gradle.model.GroowtGradleModel;
+import picocli.CommandLine;
+import picocli.CommandLine.Command;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.concurrent.Callable;
+
+@Command(name = "generate", aliases = "gen", description = "Generate a component, template, model, etc.")
+public class Generate implements Callable<Integer> {
+
+    @CommandLine.ParentCommand
+    private GroowtCli cli;
+
+    @CommandLine.Option(
+            names = { "-c", "--component" },
+            description = "Create a component with the given name."
+    )
+    private String componentName;
+
+    @CommandLine.Option(
+            names = { "-s", "--sourceSet" },
+            description = "The source set in which to generate the component, etc.",
+            defaultValue = "main"
+    )
+    private String sourceSet;
+
+    @CommandLine.Option(
+            names = { "-d", "--srcDir", "--sourceDir", "--sourceDirectory" },
+            description = "The directory in the source set in which to generate the component, etc."
+    )
+    private File sourceDir;
+
+    @SuppressWarnings("ResultOfMethodCallIgnored")
+    @Override
+    public Integer call() {
+        if (this.componentName != null) {
+            GradleUtil.doWith(this.cli.getProjectDir(), project -> {
+                final var model = project.getModel(GroowtGradleModel.class);
+                if (sourceDir == null) {
+                    this.sourceDir = new File(String.join(File.separator, "src", this.sourceSet, "groovy"));
+                }
+                final File packageDir = new File(
+                        this.sourceDir, model.getBasePackage().replace(".", File.separator)
+                );
+                packageDir.mkdirs();
+                final File componentFile = new File(packageDir, this.componentName + ".txt");
+                try (final OutputStream componentFileOutputStream = new FileOutputStream(componentFile)) {
+                    componentFileOutputStream.write("Hello, Groowt!".getBytes());
+                } catch (IOException e) {
+                    throw new RuntimeException(e);
+                }
+            });
+        }
+        return 0;
+    }
+
+}

cli/src/main/java/groowt/cli/GradleUtil.java

@@ -0,0 +1,20 @@
+package groowt.cli;
+
+import org.gradle.tooling.GradleConnector;
+import org.gradle.tooling.ProjectConnection;
+
+import java.io.File;
+import java.util.function.Consumer;
+
+public final class GradleUtil {
+
+    public static void doWith(File projectDir, Consumer<ProjectConnection> action) {
+        final var gradleConnector = GradleConnector.newConnector().forProjectDirectory(projectDir);
+        try (final var projectConnection = gradleConnector.connect()) {
+            action.accept(projectConnection);
+        }
+    }
+
+    private GradleUtil() {}
+
+}

cli/src/main/java/groowt/cli/GroowtCli.java

@@ -1,9 +1,42 @@
 package groowt.cli;
 
+import picocli.CommandLine;
+
+import java.io.File;
+
+@CommandLine.Command(
+        name = "groowt",
+        description = "The command line interface facilitating development of a Groowt project.",
+        mixinStandardHelpOptions = true,
+        version = "0.1.0",
+        subcommands = { Generate.class }
+)
 public class GroowtCli {
 
+    @CommandLine.Option(
+            names = { "-v", "--verbose" },
+            description = "Log verbosely to standard out."
+    )
+    private boolean verbose;
+
+    @CommandLine.Option(
+            names = { "--projectDir" },
+            defaultValue = ".",
+            description = "The root directory of the groowt project."
+    )
+    private File projectDir;
+
     public static void main(String[] args) {
         System.out.println("Hello from Groowt!");
+        System.exit(new CommandLine(new GroowtCli()).execute(args));
+    }
+
+    public boolean isVerbose() {
+        return this.verbose;
+    }
+
+    public File getProjectDir() {
+        return this.projectDir;
     }
 
 }

gradle/libs.versions.toml

@@ -14,6 +14,7 @@ slf4j = '2.0.12'
 antlr = { module = 'org.antlr:antlr4', version.ref = 'antlr' }
 antlr-runtime = { module = 'org.antlr:antlr4-runtime', version.ref = 'antlr' }
 asm = 'org.ow2.asm:asm:9.7'
+gradle-tooling = 'org.gradle:gradle-tooling-api:8.6'
 groovy = { module = 'org.apache.groovy:groovy', version.ref = 'groovy' }
 groovy-all = { module = 'org.apache.groovy:groovy-all', version.ref = 'groovy' }
 groovy-console = { module = 'org.apache.groovy:groovy-console', version.ref = 'groovy' }

groowt-gradle-model/build.gradle

@@ -0,0 +1,23 @@
+plugins {
+    id 'GroowtConventions'
+    id 'java-library'
+    id 'maven-publish'
+}
+
+group = 'groowt'
+version = '0.1.0'
+
+repositories {
+    maven {
+        url 'https://repo.gradle.org/gradle/libs-releases'
+    }
+}
+
+publishing {
+    publications {
+        create('groowtGradleModel', MavenPublication) {
+            artifactId = 'groowt-gradle-model'
+            from components.java
+        }
+    }
+}

groowt-gradle-model/src/main/java/groowt/gradle/model/DefaultGroowtGradleModel.java

@@ -0,0 +1,34 @@
+package groowt.gradle.model;
+
+import java.io.File;
+import java.io.Serializable;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+
+public class DefaultGroowtGradleModel implements GroowtGradleModel, Serializable {
+
+    private String basePackage;
+    private Map<String, Set<File>> sourceSetToTemplatesDirs;
+
+    @Override
+    public String getBasePackage() {
+        return this.basePackage;
+    }
+
+    public void setBasePackage(String basePackage) {
+        this.basePackage = Objects.requireNonNull(basePackage);
+    }
+
+    @Override
+    public Map<String, Set<File>> getSourceSetToTemplatesDirs() {
+        return Objects.requireNonNull(this.sourceSetToTemplatesDirs);
+    }
+
+    public void setSourceFileSets(Map<String, Set<File>> sourceSetToTemplateDir) {
+        this.sourceSetToTemplatesDirs = sourceSetToTemplateDir;
+    }
+
+
+
+}

groowt-gradle-model/src/main/java/groowt/gradle/model/GroowtGradleModel.java

@@ -0,0 +1,13 @@
+package groowt.gradle.model;
+
+import java.io.File;
+import java.util.Map;
+import java.util.Set;
+
+public interface GroowtGradleModel {
+
+    String getBasePackage();
+
+    Map<String, Set<File>> getSourceSetToTemplatesDirs();
+
+}

groowt-gradle/build.gradle

@@ -1,4 +1,5 @@
 plugins {
+    id 'GroowtConventions'
     id 'java-gradle-plugin'
     id 'com.jessebrault.jbarchiva' version '0.1.0'
     id 'maven-publish'
@@ -9,10 +10,13 @@ version = '0.1.0'
 
 repositories {
     mavenCentral()
+    maven {
+        url 'https://repo.gradle.org/gradle/libs-releases'
+    }
 }
 
 dependencies {
-    implementation libs.groovy
+    implementation libs.groovy, libs.gradle.tooling, project(':groowt-gradle-model')
 }
 
 gradlePlugin {
@@ -26,9 +30,10 @@ gradlePlugin {
 
 publishing {
     publications {
-        groowtGradlePlugin(MavenPublication) {
+        create('groowtGradlePlugin', MavenPublication) {
             artifactId = 'groowt-gradle'
             from components.java
         }
+
     }
 }

groowt-gradle/src/main/java/groowt/gradle/DefaultGroowtExtension.java

@@ -1,23 +1,22 @@
 package groowt.gradle;
 
-import org.gradle.api.internal.tasks.DefaultSourceSetContainer;
-import org.gradle.api.tasks.SourceSetContainer;
 import org.gradle.api.model.ObjectFactory;
+import org.gradle.api.provider.Property;
 
 import javax.inject.Inject;
 
 public class DefaultGroowtExtension implements GroowtExtension {
 
-    private final SourceSetContainer sourceSets;
+    private final Property<String> basePackage;
 
     @Inject
     public DefaultGroowtExtension(ObjectFactory objectFactory) {
-        this.sourceSets = objectFactory.newInstance(DefaultSourceSetContainer.class);
+        this.basePackage = objectFactory.property(String.class);
     }
 
     @Override
-    public SourceSetContainer getSourceSets() {
-        return this.sourceSets;
+    public Property<String> getBasePackage() {
+        return this.basePackage;
     }
 
 }

groowt-gradle/src/main/java/groowt/gradle/GroowtExtension.java

@@ -1,7 +1,7 @@
 package groowt.gradle;
 
-import org.gradle.api.tasks.SourceSetContainer;
+import org.gradle.api.provider.Property;
 
 public interface GroowtExtension {
-    SourceSetContainer getSourceSets();
+    Property<String> getBasePackage();
 }

groowt-gradle/src/main/java/groowt/gradle/GroowtGradlePlugin.java

@@ -1,5 +1,6 @@
 package groowt.gradle;
 
+import groowt.gradle.model.GroowtGradleModelBuilder;
 import org.gradle.api.Plugin;
 import org.gradle.api.Project;
 import org.gradle.api.artifacts.Configuration;
@@ -10,11 +11,21 @@ import org.gradle.api.plugins.JavaPlugin;
 import org.gradle.api.plugins.JavaPluginExtension;
 import org.gradle.api.provider.Provider;
 import org.gradle.api.tasks.SourceSetContainer;
+import org.gradle.tooling.provider.model.ToolingModelBuilderRegistry;
+
+import javax.inject.Inject;
 
 import static org.gradle.api.internal.lambdas.SerializableLambdas.spec;
 
 public class GroowtGradlePlugin implements Plugin<Project> {
 
+    private final ToolingModelBuilderRegistry modelBuilderRegistry;
+
+    @Inject
+    public GroowtGradlePlugin(ToolingModelBuilderRegistry modelBuilderRegistry) {
+        this.modelBuilderRegistry = modelBuilderRegistry;
+    }
+
     @Override
     public void apply(Project project) {
         // Apply java and groovy plugins, if not done already
@@ -35,6 +46,7 @@ public class GroowtGradlePlugin implements Plugin<Project> {
                 "groowt",
                 DefaultGroowtExtension.class
         );
+        groowtExtension.getBasePackage().convention("");
 
         final JavaPluginExtension javaExtension = project.getExtensions().getByType(JavaPluginExtension.class);
         final SourceSetContainer javaSourceSets = javaExtension.getSourceSets();
@@ -71,6 +83,9 @@ public class GroowtGradlePlugin implements Plugin<Project> {
 
         // create init task
         project.getTasks().create("groowtInit", GroowtInitTask.class, groowtConfigurationProvider);
+
+        // tooling models for cli
+        this.modelBuilderRegistry.register(new GroowtGradleModelBuilder());
     }
 
 }

groowt-gradle/src/main/java/groowt/gradle/model/GroowtGradleModelBuilder.java

@@ -0,0 +1,50 @@
+package groowt.gradle.model;
+
+import groowt.gradle.GroowtExtension;
+import groowt.gradle.TemplateSourceDirectorySet;
+import org.gradle.api.Project;
+import org.gradle.api.plugins.JavaPluginExtension;
+import org.gradle.api.provider.Property;
+import org.gradle.tooling.provider.model.ToolingModelBuilder;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.File;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+public class GroowtGradleModelBuilder implements ToolingModelBuilder {
+
+    @Override
+    public boolean canBuild(String modelName) {
+        return modelName.equals(GroowtGradleModel.class.getName());
+    }
+
+    @Override
+    public @NotNull Object buildAll(@NotNull String modelName, Project project) {
+        final DefaultGroowtGradleModel model = new DefaultGroowtGradleModel();
+        final var groowtExtension = project.getExtensions().getByType(GroowtExtension.class);
+
+        // base package
+        final Property<String> basePackage = groowtExtension.getBasePackage();
+        if (!basePackage.isPresent()) {
+            throw new RuntimeException(
+                    "The property 'basePackage' must be set under the 'groowt' extension in build.gradle"
+            );
+        }
+        model.setBasePackage(basePackage.get());
+
+        // templates dirs
+        final Map<String, Set<File>> sourceSetToTemplatesDirs = new HashMap<>();
+        final var javaExtension = project.getExtensions().getByType(JavaPluginExtension.class);
+        javaExtension.getSourceSets().forEach(sourceSet -> {
+            final TemplateSourceDirectorySet templateSourceDirectorySet =
+                    sourceSet.getExtensions().getByType(TemplateSourceDirectorySet.class);
+            sourceSetToTemplatesDirs.put(sourceSet.getName(), templateSourceDirectorySet.getFiles());
+        });
+        model.setSourceFileSets(sourceSetToTemplatesDirs);
+
+        return model;
+    }
+
+}

settings.gradle

@@ -26,7 +26,7 @@ pluginManagement {
 
 rootProject.name = 'groowt'
 
-include 'cli', 'groowt-gradle', 'views', 'view-components', 'web-views'
+include 'cli', 'groowt-gradle', 'groowt-gradle-model', 'views', 'view-components', 'web-views'
 
 file('util').eachDir {
     include it.name