Add date to version (#46)

* Add date to version

* Include build date, use new format

* Use version string in main

* Fix hours/mins/secs

photon-server/versioningHelper.gradle

@@ -1,3 +1,6 @@
+import java.time.LocalDateTime
+import java.time.format.DateTimeFormatter
+
 gradle.allprojects {
     ext.getCurrentVersion = { ->
         def stdout = new ByteArrayOutputStream()
@@ -5,11 +8,15 @@ gradle.allprojects {
             commandLine 'git', 'describe', '--tags'
             standardOutput = stdout
         }
-        return stdout.toString().trim().toLowerCase()
+        String tagIsh = stdout.toString().trim().toLowerCase()
+        println("Picked up version: " + tagIsh)
+        return tagIsh
     }
+    ext.versionString = getCurrentVersion()
 }
 
 task writeCurrentVersionJava {
+    String date = DateTimeFormatter.ofPattern("yyyy-M-d hh:mm:ss").format(LocalDateTime.now())
     File versionFile = new File("src/main/java/org/photonvision/PhotonVersion.java")
     versionFile.delete()
     versionFile << "package org.photonvision;\n" +
@@ -17,9 +24,13 @@ task writeCurrentVersionJava {
             "/*\n" +
             " * Autogenerated file! Do not manually edit this file. This version is regenerated\n" +
             " * any time the publish task is run, or when this file is deleted.\n" +
-            " */\n\n" +
-            "public class PhotonVersion {\n" +
-            String.format("    public static final String versionString = \"%s\";\n", getCurrentVersion()) +
+            " */\n" +
+            "\n" +
+            "@SuppressWarnings(\"ALL\")\n" +
+            "public final class PhotonVersion {\n" +
+            "    public static final String versionString = \"${versionString}\";\n" +
+            "    public static final String buildDate = \"${date}\";\n" +
+            "    public static final boolean isRelease = versionString.startsWith(\"dev\");\n" +
             "}"
 }