[templates] Add Command-based skeleton template (#4861)

Co-authored-by: Starlight220 <53231611+Starlight220@users.noreply.github.com>

wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/templates/commandbasedskeleton/Main.java

@@ -0,0 +1,15 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+package edu.wpi.first.wpilibj.templates.commandbasedskeleton;
+
+import edu.wpi.first.wpilibj.RobotBase;
+
+public final class Main {
+  private Main() {}
+
+  public static void main(String... args) {
+    RobotBase.startRobot(Robot::new);
+  }
+}

wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/templates/commandbasedskeleton/Robot.java

@@ -0,0 +1,73 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+package edu.wpi.first.wpilibj.templates.commandbasedskeleton;
+
+import edu.wpi.first.wpilibj.TimedRobot;
+import edu.wpi.first.wpilibj2.command.Command;
+import edu.wpi.first.wpilibj2.command.CommandScheduler;
+
+public class Robot extends TimedRobot {
+  private Command m_autonomousCommand;
+
+  private RobotContainer m_robotContainer;
+
+  @Override
+  public void robotInit() {
+    m_robotContainer = new RobotContainer();
+  }
+
+  @Override
+  public void robotPeriodic() {
+    CommandScheduler.getInstance().run();
+  }
+
+  @Override
+  public void disabledInit() {}
+
+  @Override
+  public void disabledPeriodic() {}
+
+  @Override
+  public void disabledExit() {}
+
+  @Override
+  public void autonomousInit() {
+    m_autonomousCommand = m_robotContainer.getAutonomousCommand();
+
+    if (m_autonomousCommand != null) {
+      m_autonomousCommand.schedule();
+    }
+  }
+
+  @Override
+  public void autonomousPeriodic() {}
+
+  @Override
+  public void autonomousExit() {}
+
+  @Override
+  public void teleopInit() {
+    if (m_autonomousCommand != null) {
+      m_autonomousCommand.cancel();
+    }
+  }
+
+  @Override
+  public void teleopPeriodic() {}
+
+  @Override
+  public void teleopExit() {}
+
+  @Override
+  public void testInit() {
+    CommandScheduler.getInstance().cancelAll();
+  }
+
+  @Override
+  public void testPeriodic() {}
+
+  @Override
+  public void testExit() {}
+}

wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/templates/commandbasedskeleton/RobotContainer.java

@@ -0,0 +1,20 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+package edu.wpi.first.wpilibj.templates.commandbasedskeleton;
+
+import edu.wpi.first.wpilibj2.command.Command;
+import edu.wpi.first.wpilibj2.command.Commands;
+
+public class RobotContainer {
+  public RobotContainer() {
+    configureBindings();
+  }
+
+  private void configureBindings() {}
+
+  public Command getAutonomousCommand() {
+    return Commands.print("No autonomous command configured");
+  }
+}

wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/templates/templates.json

@@ -10,6 +10,17 @@
     "mainclass": "Main",
     "commandversion": 2
   },
+  {
+    "name": "Command Robot Skeleton (Advanced)",
+    "description": "Skeleton (stub) code for Command Robot",
+    "tags": [
+      "Command", "Skeleton"
+    ],
+    "foldername": "commandbasedskeleton",
+    "gradlebase": "java",
+    "mainclass": "Main",
+    "commandversion": 2
+  },
   {
     "name": "Timed Robot",
     "description": "Timed style",