add deps for GraphCLI

app/build.gradle.kts

@@ -8,6 +8,7 @@
 plugins {
   // Apply the application plugin to add support for building a CLI application in Java.
   application
+  id("com.gradleup.shadow") version "9.0.0-beta12"
 }
 
 repositories {
@@ -23,6 +24,8 @@ dependencies {
 
   // This dependency is used by the application.
   implementation(libs.guava)
+
+  implementation("org.jline:jline:3.29.0")
 }
 
 // Apply a specific Java toolchain to ease working on different environments.
@@ -30,7 +33,7 @@ java { toolchain { languageVersion = JavaLanguageVersion.of(21) } }
 
 application {
   // Define the main class for the application.
-  mainClass = "fun.youthlic.Graph"
+  mainClass = "fun.youthlic.GraphCLI"
 }
 
 tasks.named<Test>("test") {

app/src/main/java/fun/youthlic/GraphCLI.java

@@ -0,0 +1,28 @@
+package fun.youthlic;
+
+import java.io.IOException;
+
+import org.jline.reader.LineReader;
+import org.jline.reader.LineReaderBuilder;
+import org.jline.reader.impl.DefaultParser;
+import org.jline.terminal.Terminal;
+import org.jline.terminal.TerminalBuilder;
+
+public class GraphCLI {
+
+    public static void main(final String[] args) {
+        try {
+            final Terminal terminal = TerminalBuilder.builder().system(true).build();
+            final LineReader reader = LineReaderBuilder.builder().terminal(terminal).parser(new DefaultParser())
+                    .build();
+            while (true) {
+                final String line = reader.readLine("graph> ");
+                if (line.trim().equalsIgnoreCase("exit"))
+                    break;
+                System.out.println(line);
+            }
+        } catch (final IOException e) {
+        } finally {
+        }
+    }
+}