Support using Gradle's 'include' in settings plugin

This allows to configure project paths individually via the
native include("...") statement while still using other functionality
provided by the settings plugin.

Author: jjohannes

CHANGELOG.md

@@ -1,6 +1,7 @@
 # Java Module Dependencies Gradle Plugin - Changelog
 
 ## Version 1.8
+* [#136](https://github.com/gradlex-org/java-module-dependencies/pull/136) Support hierarchical project paths in Settings DSL
 * [#141](https://github.com/gradlex-org/java-module-dependencies/pull/141) Introduce `org.gradlex.java-module-dependencies.register-help-tasks` property
 * [#127](https://github.com/gradlex-org/java-module-dependencies/issues/127) Less configuration cache misses when modifying `module-info.java` (Thanks [TheGoesen](https://github.com/TheGoesen))
 * [#128](https://github.com/gradlex-org/java-module-dependencies/issues/128) Less configuration cache misses when using Settings plugin (Thanks [TheGoesen](https://github.com/TheGoesen))

README.MD

@@ -129,6 +129,19 @@ javaModules { // use instead of 'include(...)'
 }
 ```
 
+If you need more control over the properties of a Gradle subproject, in particular to define a nested project path,
+you can still use Gradle's `include(...)` and then register the subproject with this plugin.
+
+```
+include(":project:with:custom:path")
+javaModules { 
+  module(project(":project:with:custom:path")) {
+    group = "org.example"  // define group early so that all subprojects know all groups
+    plugin("java-library") // apply plugin to the Module's subproject to omit 'build.gradle'
+  }
+}
+```
+
 ## Project structure definition when using this plugin as Project Plugin
 
 In this setup, subprojects with Java Modules are configured as in any traditional Gradle build: by using the

src/main/java/org/gradlex/javamodule/dependencies/initialization/Directory.java

@@ -20,7 +20,6 @@
 import org.gradle.api.model.ObjectFactory;
 import org.gradle.api.provider.ListProperty;
 import org.gradle.api.provider.Property;
-import org.gradle.api.provider.Provider;
 
 import javax.inject.Inject;
 import java.io.File;
@@ -80,8 +79,7 @@ public void module(String subDirectory, Action<Module> action) {
     }
 
     Module addModule(String subDirectory) {
-        Module module = getObjects().newInstance(Module.class, root);
-        module.getDirectory().convention(subDirectory);
+        Module module = getObjects().newInstance(Module.class, new File(root, subDirectory));
         module.getGroup().convention(getGroup());
         module.getPlugins().addAll(getPlugins());
         return module;

src/main/java/org/gradlex/javamodule/dependencies/initialization/JavaModulesExtension.java

@@ -72,10 +72,27 @@ public void module(String directory) {
      * Register and configure Module located in the given folder, relative to the build root directory.
      */
     public void module(String directory, Action<Module> action) {
-        Module module = getObjects().newInstance(Module.class, settings.getRootDir());
-        module.getDirectory().set(directory);
+        Module module = getObjects().newInstance(Module.class, new File(settings.getRootDir(), directory));
         action.execute(module);
-        includeModule(module, new File(settings.getRootDir(), module.getDirectory().get()));
+        includeModule(module, new File(settings.getRootDir(), directory));
+    }
+
+    /**
+     * {@link JavaModulesExtension#module(ProjectDescriptor, Action)}
+     */
+    public void module(ProjectDescriptor project) {
+        module(project, m -> {});
+    }
+
+    /**
+     * Register and configure Module already registered as project by an 'include' statement.
+     */
+    public void module(ProjectDescriptor project, Action<Module> action) {
+        Module module = getObjects().newInstance(Module.class, project.getProjectDir());
+        module.getArtifact().set(project.getName());
+        module.getArtifact().finalizeValue(); // finalize, as the project name can no longer be changed
+        action.execute(module);
+        configureModule(module, project);
     }
 
     /**
@@ -94,7 +111,7 @@ public void directory(String directory, Action<Directory> action) {
         action.execute(moduleDirectory);
 
         for (Module module : moduleDirectory.customizedModules.values()) {
-            includeModule(module, new File(modulesDirectory, module.getDirectory().get()));
+            includeModule(module, module.directory);
         }
         Provider<List<String>> listProvider = getProviders().of(ValueModuleDirectoryListing.class, spec -> {
             spec.getParameters().getExclusions().set(moduleDirectory.getExclusions());
@@ -119,7 +136,7 @@ public void versions(String directory) {
         String projectName = Paths.get(directory).getFileName().toString();
         settings.include(projectName);
         settings.project(":" + projectName).setProjectDir(new File(settings.getRootDir(), directory));
-        settings.getGradle().getLifecycle().beforeProject(new ApplyJavaModuleVersionsPluginAction(projectName));
+        settings.getGradle().getLifecycle().beforeProject(new ApplyJavaModuleVersionsPluginAction(":" + projectName));
     }
 
     private void includeModule(Module module, File projectDir) {
@@ -128,28 +145,32 @@ private void includeModule(Module module, File projectDir) {
         ProjectDescriptor project = settings.project(":" + artifact);
         project.setProjectDir(projectDir);
 
+        configureModule(module, project);
+    }
+
+    private void configureModule(Module module, ProjectDescriptor project) {
         String mainModuleName = null;
-        for (String path : module.getModuleInfoPaths().get()) {
-            ModuleInfo moduleInfo = moduleInfoCache.put(projectDir, path,
-                    module.getArtifact().get(), module.getGroup(), settings.getProviders());
-            if (path.contains("/main/")) {
+        for (String moduleInfoPath : module.getModuleInfoPaths().get()) {
+            ModuleInfo moduleInfo = moduleInfoCache.put(project.getProjectDir(), moduleInfoPath,
+                    project.getPath(), module.getArtifact().get(), module.getGroup(), settings.getProviders());
+            if (moduleInfoPath.contains("/main/")) {
                 mainModuleName = moduleInfo.getModuleName();
             }
         }
 
         String group = module.getGroup().getOrNull();
         List<String> plugins = module.getPlugins().get();
-        moduleProjects.add(new ModuleProject(artifact, group, plugins, mainModuleName));
+        moduleProjects.add(new ModuleProject(project.getPath(), group, plugins, mainModuleName));
     }
 
     private static class ModuleProject {
-        private final String artifact;
+        private final String path;
         private final String group;
         private final List<String> plugins;
         private final String mainModuleName;
 
-        public ModuleProject(String artifact, String group, List<String> plugins, String mainModuleName) {
-            this.artifact = artifact;
+        public ModuleProject(String path, String group, List<String> plugins, String mainModuleName) {
+            this.path = path;
             this.group = group;
             this.plugins = plugins;
             this.mainModuleName = mainModuleName;
@@ -170,7 +191,7 @@ public ApplyPluginsAction(List<ModuleProject> moduleProjects, ModuleInfoCache mo
         @Override
         public void execute(Project project) {
             for (ModuleProject m : moduleProjects) {
-                if (project.getName().equals(m.artifact)) {
+                if (project.getPath().equals(m.path)) {
                     if (m.group != null) project.setGroup(m.group);
                     project.getPlugins().apply(JavaModuleDependenciesPlugin.class);
                     project.getExtensions().getByType(JavaModuleDependenciesExtension.class).getModuleInfoCache().set(moduleInfoCache);
@@ -187,15 +208,15 @@ public void execute(Project project) {
     @NonNullApi
     private static class ApplyJavaModuleVersionsPluginAction implements IsolatedAction<Project> {
 
-        private final String projectName;
+        private final String projectPath;
 
-        public ApplyJavaModuleVersionsPluginAction(String projectName) {
-            this.projectName = projectName;
+        public ApplyJavaModuleVersionsPluginAction(String projectPath) {
+            this.projectPath = projectPath;
         }
 
         @Override
         public void execute(Project project) {
-            if (projectName.equals(project.getName())) {
+            if (projectPath.equals(project.getPath())) {
                 project.getPlugins().apply(JavaPlatformPlugin.class);
                 project.getPlugins().apply(JavaModuleVersionsPlugin.class);
                 project.getExtensions().getByType(JavaPlatformExtension.class).allowDependencies();

src/main/java/org/gradlex/javamodule/dependencies/initialization/Module.java

@@ -28,11 +28,6 @@
 
 public abstract class Module {
 
-    /**
-     * The directory, relative to the build root directory, in which the Module is located.
-     */
-    public abstract Property<String> getDirectory();
-
     /**
      * The 'artifact' name of the Module. This corresponds to the Gradle subproject name. If the Module is published
      * to a Maven repository, this is the 'artifact' in the 'group:artifact' identifier to address the published Jar.
@@ -58,14 +53,17 @@ public abstract class Module {
      */
     public abstract ListProperty<String> getPlugins();
 
+    File directory;
+
     @Inject
-    public Module(File root) {
-        getArtifact().convention(getDirectory().map(f -> Paths.get(f).getFileName().toString()));
-        getModuleInfoPaths().convention(getDirectory().map(projectDir -> listChildren(root, projectDir + "/src")
+    public Module(File directory) {
+        this.directory = directory;
+        getArtifact().convention(directory.getName());
+        getModuleInfoPaths().convention(listSrcChildren()
                 .map(srcDir -> new File(srcDir, "java/module-info.java"))
                 .filter(File::exists)
                 .map(moduleInfo -> "src/" + moduleInfo.getParentFile().getParentFile().getName() + "/java")
-                .collect(Collectors.toList())));
+                .collect(Collectors.toList()));
     }
 
     /**
@@ -76,8 +74,8 @@ public void plugin(String id) {
         getPlugins().add(id);
     }
 
-    private Stream<File> listChildren(File root, String projectDir) {
-        File[] children = new File(root, projectDir).listFiles();
+    private Stream<File> listSrcChildren() {
+        File[] children = new File(directory, "src").listFiles();
         return children == null ? Stream.empty() : Arrays.stream(children);
     }
 }

src/main/java/org/gradlex/javamodule/dependencies/internal/utils/ModuleInfoCache.java

@@ -81,11 +81,11 @@ public File getFolder(SourceSet sourceSet, ProviderFactory providers) {
      * @param projectRoot the project that should hold a Java module
      * @return parsed module-info.java for the given project assuming a standard Java project layout
      */
-    public ModuleInfo put(File projectRoot, String moduleInfoPath, String artifact, Provider<String> group, ProviderFactory providers) {
+    public ModuleInfo put(File projectRoot, String moduleInfoPath, String projectPath, String artifact, Provider<String> group, ProviderFactory providers) {
         File folder = new File(projectRoot, moduleInfoPath);
         if (maybePutModuleInfo(folder, providers)) {
             ModuleInfo thisModuleInfo = moduleInfo.get(folder);
-            moduleNameToProjectPath.put(thisModuleInfo.getModuleName(), ":" + artifact);
+            moduleNameToProjectPath.put(thisModuleInfo.getModuleName(), projectPath);
             Path parentDirectory = Paths.get(moduleInfoPath).getParent();
             String capabilitySuffix = parentDirectory == null ? null : sourceSetToCapabilitySuffix(parentDirectory.getFileName().toString());
             if (capabilitySuffix != null) {

src/test/groovy/org/gradlex/javamodule/dependencies/test/initialization/SettingsPluginIncludeTest.groovy

@@ -0,0 +1,113 @@
+package org.gradlex.javamodule.dependencies.test.initialization
+
+import org.gradlex.javamodule.dependencies.test.fixture.GradleBuild
+import spock.lang.Specification
+
+import static org.gradle.testkit.runner.TaskOutcome.SUCCESS
+
+class SettingsPluginIncludeTest extends Specification {
+
+    @Delegate
+    GradleBuild build = new GradleBuild()
+
+    def setup() {
+        settingsFile.text = '''
+            plugins { id("org.gradlex.java-module-dependencies") }
+        '''
+        appBuildFile.delete()
+        libBuildFile.delete()
+    }
+
+    def "can define included subprojects as modules"() {
+        given:
+        settingsFile << '''
+            include(":project:with:custom:path")
+            javaModules { 
+                module(project(":project:with:custom:path")) {
+                    group = "org.example"
+                    plugin("java-library")
+                }
+                module(project(":project:with:custom")) {
+                    group = "org.example"
+                    plugin("java-library")
+                }
+            }
+        '''
+
+        file('project/with/custom/path/src/main/java/module-info.java') << 'module abc.liba { }'
+        file('project/with/custom/src/main/java/module-info.java') << '''module abc.libb {
+            requires abc.liba;
+        }'''
+
+        when:
+        def result = runner(':project:with:custom:compileJava').build()
+
+        then:
+        result.task(":project:with:custom:path:compileJava").outcome == SUCCESS
+        result.task(":project:with:custom:compileJava").outcome == SUCCESS
+    }
+
+    def "can define included subprojects with custom project directory as modules"() {
+        given:
+        settingsFile << '''
+            include(":project:with:custom:path")
+            project(":project:with:custom:path").projectDir = file("lib")
+            project(":project:with:custom").projectDir = file("app")
+            javaModules { 
+                module(project(":project:with:custom:path")) {
+                    group = "org.example"
+                    plugin("java-library")
+                }
+                module(project(":project:with:custom")) {
+                    group = "org.example"
+                    plugin("java-library")
+                }
+            }
+        '''
+
+        file("project/with").mkdirs()
+        libModuleInfoFile << 'module abc.lib { }'
+        appModuleInfoFile << '''module abc.app {
+            requires abc.lib;
+        }'''
+
+        when:
+        def result = runner(':project:with:custom:jar').build()
+
+        then:
+        result.task(":project:with:custom:path:compileJava").outcome == SUCCESS
+        result.task(":project:with:custom:compileJava").outcome == SUCCESS
+        file("lib/build/libs/path.jar").exists()
+        file("app/build/libs/custom.jar").exists()
+    }
+
+    def "projects with same name but different paths are supported"() {
+        given:
+        settingsFile << '''
+            include(":app1:feature1:data")
+            include(":app1:feature2:data")
+            
+            rootProject.children.forEach { appContainer ->
+                appContainer.children.forEach { featureContainer ->
+                    featureContainer.children.forEach { module ->
+                        javaModules.module(module) { plugin("java-library") }
+                    }
+                }
+            }
+        '''
+
+        file('app1/feature1/data/src/main/java/module-info.java') << 'module f1x.data { }'
+        file('app1/feature2/data/src/main/java/module-info.java') << '''module f2x.data {
+            requires f1x.data;
+        }'''
+
+        when:
+        def result = runner(':app1:feature2:data:jar').build()
+
+        then:
+        result.task(":app1:feature1:data:jar").outcome == SUCCESS
+        result.task(":app1:feature2:data:jar").outcome == SUCCESS
+        file("app1/feature1/data/build/libs/data.jar").exists()
+        file("app1/feature2/data/build/libs/data.jar").exists()
+    }
+}