Kotlin DSL support

org.eclipse.buildship.kotlindsl.provider/.classpath

@@ -1,7 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="src" path="src/main/java"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
-	<classpathentry kind="src" path="src"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>

org.eclipse.buildship.kotlindsl.provider/META-INF/MANIFEST.MF

@@ -12,4 +12,5 @@ Require-Bundle: org.eclipse.core.contenttype,
  org.eclipse.tm4e.registry,
  org.eclipse.jdt.launching,
  org.eclipse.swt
-Automatic-Module-Name: org.eclipse.buildship.kotlindsl.provider
+Export-Package: org.eclipse.buildship.kotlindsl.provider
+

org.eclipse.buildship.kotlindsl.provider/build.gradle

@@ -1 +1,16 @@
+plugins{
+	id 'de.undercouch.download' version '5.4.0'
+}
+
 apply plugin: eclipsebuild.BundlePlugin
+dependencies {
+	api withEclipseBundle("org.eclipse.swt.${ECLIPSE_WS}.${ECLIPSE_OS}.${ECLIPSE_ARCH}")
+}
+
+def copyLibs = tasks.register('downloadLibs', Download) {
+	src 'https://maven.pkg.github.com/D0zee/language-server-for-KTS-scripts/kts-language-server/server/1.0.0/server-1.0.0-all.jar'
+	dest file('libs')
+	// type here own an username and key (classic token from github which allows read packages)
+	username project.findProperty('gpr.user')
+	password project.findProperty('gpr.key')
+}

org.eclipse.buildship.kotlindsl.provider/build.properties

@@ -1,6 +1,8 @@
-source.. = src/
+source.. = src/main/java,
 output.. = bin/
 bin.includes = .,\
+               libs/,\
                plugin.xml,\
                kotlin.tmLanguage.json,\
                META-INF/
+

org.eclipse.buildship.kotlindsl.provider/plugin.xml

@@ -5,7 +5,7 @@
          point="org.eclipse.core.contenttype.contentTypes">
       <content-type
             base-type="org.eclipse.core.runtime.text"
-            file-extensions="kts"
+            file-patterns="*.gradle.kts"
             id="org.eclipse.buildship.kotlindsl.content"
             name="kotlin DSL content type"
             priority="normal">
@@ -30,4 +30,17 @@
       </editorContentTypeBinding>
    </extension>
 
+   <extension
+         point="org.eclipse.lsp4e.languageServer">
+      <contentTypeMapping
+            contentType="org.eclipse.buildship.kotlindsl.content"
+            id="org.eclipse.buildship.kotlindsl.provider.server">
+      </contentTypeMapping>
+      <server
+            class="org.eclipse.buildship.kotlindsl.provider.KotlinDSLConnectionProvider"
+            id="org.eclipse.buildship.kotlindsl.provider.server"
+            label="Kotlin DSL language server">
+      </server>
+   </extension>
+
 </plugin>

org.eclipse.buildship.kotlindsl.provider/src/main/java/org/eclipse/buildship/kotlindsl/provider/KotlinDSLConnectionProvider.java

@@ -0,0 +1,110 @@
+/*******************************************************************************
+ * Copyright (c) 2023 Gradle Inc. and others
+ *
+ * This program and the accompanying materials are made
+ * available under the terms of the Eclipse Public License 2.0
+ * which is available at https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ ******************************************************************************/
+package org.eclipse.buildship.kotlindsl.provider;
+
+import java.io.IOException;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Arrays;
+
+import org.eclipse.lsp4e.server.ProcessStreamConnectionProvider;
+import org.eclipse.lsp4e.server.StreamConnectionProvider;
+import org.eclipse.core.runtime.FileLocator;
+import org.eclipse.jdt.launching.IVMInstall;
+import org.eclipse.jdt.launching.JavaRuntime;
+import org.eclipse.jdt.launching.environments.IExecutionEnvironment;
+import org.osgi.framework.FrameworkUtil;
+import org.osgi.framework.Bundle;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.widgets.MessageBox;
+import org.eclipse.swt.widgets.Shell;
+import org.eclipse.ui.PlatformUI;
+
+/**
+ * Is a entry point to launching of a kotlin language server.
+ *
+ * @author Nikolai Vladimirov
+ */
+
+public class KotlinDSLConnectionProvider extends ProcessStreamConnectionProvider
+    implements StreamConnectionProvider {
+
+  public KotlinDSLConnectionProvider() {
+    URL localFileURL;
+    Bundle bundle = FrameworkUtil.getBundle(KotlinDSLConnectionProvider.class);
+    try {
+      localFileURL = FileLocator.toFileURL(bundle.getEntry("/"));
+      URI localFileURI = new URI(localFileURL.toExternalForm());
+      Path pathToPlugin = Paths.get(localFileURI.getPath());
+
+      String pathToServer = pathToPlugin.resolve("libs/server-1.0.0-all.jar").toString();
+
+      IExecutionEnvironment[] executionEnvironments = JavaRuntime.getExecutionEnvironmentsManager()
+          .getExecutionEnvironments();
+
+      IExecutionEnvironment java11Environment = null;
+
+      for (IExecutionEnvironment environment : executionEnvironments) {
+        if (environment.getId().equals("JavaSE-11")) {
+          java11Environment = environment;
+          break;
+        }
+      }
+
+      ArrayList<IVMInstall> compatibleJVMs = new ArrayList<>(
+          Arrays.asList(java11Environment.getCompatibleVMs()));
+      IVMInstall defaultVMInstall = JavaRuntime.getDefaultVMInstall();
+      IVMInstall javaExecutable = null;
+
+      if (!compatibleJVMs.isEmpty()) {
+        if (compatibleJVMs.contains(defaultVMInstall)) {
+          javaExecutable = defaultVMInstall;
+        } else {
+          javaExecutable = compatibleJVMs.get(0);
+        }
+
+        String pathToJavaExecutable = javaExecutable.getInstallLocation().toPath().resolve("bin")
+            .resolve("java")
+            .toString();
+
+        List<String> commands = new ArrayList<>(
+            Arrays.asList(pathToJavaExecutable, "-jar", pathToServer));
+
+        // add in commands path to bin application of language server
+        setCommands(commands);
+        setWorkingDirectory(pathToPlugin.toString());
+
+      } else {
+        PlatformUI.getWorkbench().getDisplay().syncExec(new Runnable() {
+          public void run() {
+            Shell shell = new Shell();
+            MessageBox messageBox = new MessageBox(shell, SWT.ICON_WARNING | SWT.OK);
+            messageBox.setText("Error");
+            messageBox.setMessage(
+                "Compatible version of Java isn't found! Install and rerun application.");
+            messageBox.open();
+            shell.dispose();
+          }
+        });
+      }
+
+
+    } catch (IOException | URISyntaxException e) {
+      System.err.println("[GradlePropertiesConnectionProvider]:" + e.toString());
+      e.printStackTrace();
+    }
+  }
+
+}