IEP-1277 Create .clang_format

bundles/com.espressif.idf.core/src/com/espressif/idf/core/ILSPConstants.java

@@ -11,4 +11,5 @@ public interface ILSPConstants
 {
 	String CLANGD_EXECUTABLE = "clangd"; //$NON-NLS-1$
 	String CLANGD_CONFIG_FILE = ".clangd"; //$NON-NLS-1$
+	String CLANG_FORMAT_FILE = ".clang-format"; //$NON-NLS-1$
 }

bundles/com.espressif.idf.core/src/com/espressif/idf/core/build/IDFBuildConfiguration.java

@@ -85,6 +85,7 @@
 import com.espressif.idf.core.internal.CMakeConsoleWrapper;
 import com.espressif.idf.core.internal.CMakeErrorParser;
 import com.espressif.idf.core.logging.Logger;
+import com.espressif.idf.core.util.ClangFormatFileHandler;
 import com.espressif.idf.core.util.ClangdConfigFileHandler;
 import com.espressif.idf.core.util.DfuCommandsUtil;
 import com.espressif.idf.core.util.HintsUtil;
@@ -339,6 +340,7 @@ public IProject[] build(int kind, Map<String, String> args, IConsole console, IP
 			}
 			runCmakeBuildCommand(console, monitor, project, start, generator, infoStream, buildDir);
 			new ClangdConfigFileHandler().update(project);
+			new ClangFormatFileHandler(project).update();
 			return new IProject[] { project };
 		}
 		catch (Exception e)

bundles/com.espressif.idf.core/src/com/espressif/idf/core/util/ClangFormatFileHandler.java

@@ -0,0 +1,87 @@
+/*******************************************************************************
+ * Copyright 2024 Espressif Systems (Shanghai) PTE LTD. All rights reserved.
+ * Use is subject to license terms.
+ *******************************************************************************/
+package com.espressif.idf.core.util;
+
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.Writer;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+import org.eclipse.core.resources.IProject;
+import org.eclipse.core.resources.IResource;
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.NullProgressMonitor;
+import org.yaml.snakeyaml.DumperOptions;
+import org.yaml.snakeyaml.Yaml;
+
+import com.espressif.idf.core.ILSPConstants;
+
+public class ClangFormatFileHandler {
+
+    private final IProject project;
+    private final Path clangFormatPath;
+
+    public ClangFormatFileHandler(IProject project) throws CoreException {
+        this.project = project;
+        this.clangFormatPath = project.getLocation().toPath().resolve(ILSPConstants.CLANG_FORMAT_FILE);
+    }
+
+	/**
+	 * Updates the .clang-format file. If the file does not exist, it is created and initialized with default settings.
+	 *
+	 * @throws IOException   if an I/O error occurs during file creation or writing
+	 * @throws CoreException if an error occurs while refreshing the project
+	 */
+    public void update() throws IOException, CoreException {
+		boolean isNewFile = createNewClangFormatFile();
+
+        if (isNewFile) {
+			Map<String, Object> data = new LinkedHashMap<>();
+			data.put("BasedOnStyle", "LLVM"); //$NON-NLS-1$ //$NON-NLS-2$
+			data.put("IndentWidth", 4); //$NON-NLS-1$
+
+            writeYamlFile(data);
+        }
+    }
+
+    private DumperOptions createYamlOptions() {
+        DumperOptions options = new DumperOptions();
+        options.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK);
+        options.setPrettyFlow(true);
+        return options;
+    }
+
+    private void writeYamlFile(Map<String, Object> data) throws IOException {
+        try (Writer writer = new FileWriter(clangFormatPath.toFile())) {
+            new Yaml(createYamlOptions()).dump(data, writer);
+        }
+    }
+
+	/**
+	 * Ensures that the .clang-format file exists. If the file does not exist, it is created and the project is
+	 * refreshed.
+	 *
+	 * @return true if the file was created, false if it already existed
+	 * @throws IOException   if an I/O error occurs during file creation
+	 * @throws CoreException if an error occurs while refreshing the project
+	 */
+	private boolean createNewClangFormatFile() throws IOException, CoreException
+	{
+        if (Files.exists(clangFormatPath)) {
+            return false;
+        }
+
+        try {
+            Files.createFile(clangFormatPath);
+            project.refreshLocal(IResource.DEPTH_INFINITE, new NullProgressMonitor());
+            return true;
+        } catch (IOException e) {
+            throw new IOException("Failed to create .clang_format file: " + e.getMessage(), e); //$NON-NLS-1$
+        }
+    }
+}

bundles/com.espressif.idf.core/src/com/espressif/idf/core/util/LspService.java

@@ -66,5 +66,4 @@ public void updateLspQueryDrivers()
 					metadata.queryDriver().defaultValue());
 		}
 	}
-
 }

bundles/com.espressif.idf.ui/src/com/espressif/idf/ui/wizard/NewIDFProjectWizard.java

@@ -39,6 +39,7 @@
 import com.espressif.idf.core.IDFConstants;
 import com.espressif.idf.core.build.IDFLaunchConstants;
 import com.espressif.idf.core.logging.Logger;
+import com.espressif.idf.core.util.ClangFormatFileHandler;
 import com.espressif.idf.core.util.ClangdConfigFileHandler;
 import com.espressif.idf.core.util.LaunchUtil;
 import com.espressif.idf.ui.UIPlugin;
@@ -110,7 +111,7 @@ public boolean performFinish()
 				String projectName = projectCreationWizardPage.getProjectName();
 				IProject project = ResourcesPlugin.getWorkspace().getRoot().getProject(projectName);
 				selProvider.setSelection(new StructuredSelection(project));
-				updateClangdFile(project);
+				updateClangFiles(project);
 			}
 		}
 
@@ -141,11 +142,12 @@ public boolean performFinish()
 		return performFinish;
 	}
 
-	private void updateClangdFile(IProject project)
+	private void updateClangFiles(IProject project)
 	{
 		try
 		{
 			new ClangdConfigFileHandler().update(project);
+			new ClangFormatFileHandler(project).update();
 		}
 		catch (Exception e)
 		{