Version file in deploy folder

.gitignore

@@ -1,6 +1,9 @@
 # This gitignore has been specially created by the WPILib team.
 # If you remove items from this file, intellisense might break.
 
+### Version Files ###
+src/main/deploy/versionfile.txt
+
 ### C++ ###
 # Prerequisites
 *.d

build.gradle

@@ -101,9 +101,41 @@ deployArtifact.jarTask = jar
 wpi.java.configureExecutableTasks(jar)
 wpi.java.configureTestTasks(test)
 
+def saveCommitTask = tasks.register("saveCommit") {
+    println "Current Version: " + getCheckedOutGitCommitHash();
+
+    def deployFolder = "$projectDir/src/main/deploy/"
+    def commitFile = new FileWriter(deployFolder + "versionfile.txt");
+    doLast {
+        commitFile.write(getCheckedOutGitCommitHash() + " - " + new Date().toString());
+        commitFile.close();
+        println "versionfile.txt written";
+    }
+}
+
+def getCheckedOutGitCommitHash() {
+    def gitFolder = "$projectDir/.git/"
+    def takeFromHash = 12
+    /*
+     * '.git/HEAD' contains either
+     *      in case of detached head: the currently checked out commit hash
+     *      otherwise: a reference to a file containing the current commit hash
+     */
+    def head = new File(gitFolder + "HEAD").text.split(":") // .git/HEAD
+    def isCommit = head.length == 1 // e5a7c79edabbf7dd39888442df081b1c9d8e88fd
+    // def isRef = head.length > 1     // ref: refs/heads/master
+
+    if(isCommit) return head[0].trim().take(takeFromHash) // e5a7c79edabb
+
+    def refHead = new File(gitFolder + head[1].trim()) // .git/refs/heads/master
+    refHead.text.trim().take takeFromHash
+}
+
 // Configure string concat to always inline compile
 tasks.withType(JavaCompile) {
     options.compilerArgs.add '-XDstringConcat=inline'
+    dependsOn saveCommitTask
 }
 
+
 apply from: 'libs.gradle'

src/main/java/frc/robot/Robot.java

@@ -4,6 +4,10 @@
 
 package frc.robot;
 
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.util.Scanner;
+
 import org.fairportrobotics.frc.posty.PostyManager;
 import org.littletonrobotics.junction.LogFileUtil;
 import org.littletonrobotics.junction.LoggedRobot;
@@ -12,6 +16,7 @@ import org.littletonrobotics.junction.networktables.NT4Publisher;
 import org.littletonrobotics.junction.wpilog.WPILOGReader;
 import org.littletonrobotics.junction.wpilog.WPILOGWriter;
 
+import edu.wpi.first.wpilibj.Filesystem;
 import edu.wpi.first.wpilibj.PowerDistribution;
 import edu.wpi.first.wpilibj.PowerDistribution.ModuleType;
 import edu.wpi.first.wpilibj2.command.Command;
@@ -31,6 +36,19 @@ public class Robot extends LoggedRobot {
 
   private RobotContainer m_robotContainer;
 
+  public static String getVersion() {
+    try {
+      Scanner scan = new Scanner(new File(Filesystem.getDeployDirectory().getAbsolutePath() + "/versionfile.txt"));
+      String ver = scan.nextLine();
+      scan.close();
+
+      return ver;
+    } catch (FileNotFoundException e) {
+      e.printStackTrace();
+    }
+    return "";
+  }
+
   /**
    * This function is run when the robot is first started up and should be used
    * for any
@@ -40,6 +58,7 @@ public class Robot extends LoggedRobot {
   public void robotInit() {
 
     Logger.recordMetadata("ProjectName", "MyProject"); // Set a metadata value
+    Logger.recordMetadata("Software Version", getVersion());
 
     if (isReal()) {
       Logger.addDataReceiver(new WPILOGWriter()); // Log to a USB stick ("/U/logs")
@@ -58,6 +77,8 @@ public class Robot extends LoggedRobot {
     Logger.start(); // Start logging! No more data receivers, replay sources, or metadata values may
                     // be added.
 
+    Logger.recordOutput("Software Version", getVersion());
+
     // Instantiate our RobotContainer. This will perform all our button bindings,
     // and put our
     // autonomous chooser on the dashboard.