Auto-format files at build time

.styleguide-license

@@ -0,0 +1,6 @@
+/*
+ * Copyright (c) $YEAR Newport Robotics Group. All Rights Reserved.
+ *
+ * Open Source Software; you can modify and/or share it under the terms of
+ * the license file in the root directory of this project.
+ */

LICENSE

@@ -0,0 +1,24 @@
+Copyright (c) 2024 Newport Robotics Group All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+* Redistributions in binary form must reproduce the above copyright notice, this
+  list of conditions and the following disclaimer in the documentation and/or
+  other materials provided with the distribution.
+* Neither the name of Newport Robotics Group, NRG, NRG948, FIRST, WPILib, nor
+  the names of other WPILib contributors may be used to endorse or promote
+  products derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY NEWPORT ROBOTICS GROUP "AS IS" AND ANY EXPRESS OR
+IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY NONINFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL FIRST, NEWPORT ROBOTICS GROUP OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

build.gradle

@@ -10,13 +10,21 @@ buildscript {
 plugins {
     id "java"
     id "edu.wpi.first.GradleRIO" version "2024.2.1"
+    id "com.diffplug.spotless"  version "6.25.0"
 }
 
 java {
     sourceCompatibility = JavaVersion.VERSION_17
     targetCompatibility = JavaVersion.VERSION_17
 }
 
+spotless {
+    java {
+        googleJavaFormat()
+        licenseHeaderFile  "./.styleguide-license"
+    }
+}
+
 def ROBOT_MAIN_CLASS = "frc.robot.Main"
 
 repositories {
@@ -147,5 +155,8 @@ task generateReflectionsMetadata {
     }
 }
 
+// Reformat Java files before compiing the robot code.
+compileJava.dependsOn 'spotlessApply'
+
 // Generate the NRG Common Library metadata when the robot code is built.
 jar.dependsOn generateReflectionsMetadata