#737: Added cd command to shell commandlet

cli/src/main/java/com/devonfw/tools/ide/commandlet/ShellCommandlet.java

@@ -1,6 +1,9 @@
 package com.devonfw.tools.ide.commandlet;
 
 import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.Iterator;
 
 import org.fusesource.jansi.AnsiConsole;
@@ -129,9 +132,40 @@ private int runCommand(String args) {
     String[] arguments = args.split(" ", 0);
     CliArguments cliArgs = new CliArguments(arguments);
     cliArgs.next();
+
+    if ("cd".equals(arguments[0])) {
+      return changeDirectory(cliArgs);
+    }
+
     return ((AbstractIdeContext) this.context).run(cliArgs);
   }
 
+  private int changeDirectory(CliArguments cliArgs) {
+    if (!cliArgs.hasNext()) {
+      this.context.error("Error: 'cd' requires a directory argument.");
+      return -1;
+    }
+
+    String targetDir = String.valueOf(cliArgs.next());
+    Path path = Paths.get(targetDir);
+
+    // If the given path is relative, resolve it relative to the current directory
+    if (!path.isAbsolute()) {
+      path = Paths.get(System.getProperty("user.dir")).resolve(path).normalize();
+    }
+
+    // Check if the path exists and is a directory
+    if (Files.exists(path) && Files.isDirectory(path)) {
+      // Set the current working directory to the new path
+      System.setProperty("user.dir", path.toAbsolutePath().toString());
+      this.context.info("Changed directory to: " + path.toAbsolutePath());
+      return 0;
+    } else {
+      this.context.error("Error: Directory not found: " + targetDir);
+      return -1;
+    }
+  }
+
   /**
    * @param argument the current {@link CliArgument} (position) to match.
    * @param commandlet the potential {@link Commandlet} to match.