gradle.allprojects {
    ext.getCurrentVersion = { ->
        def stdout = new ByteArrayOutputStream()
        exec {
            commandLine 'git', 'describe', '--tags'
            standardOutput = stdout
        }
        return stdout.toString().trim().toLowerCase()
    }
}

task writeCurrentVersionJava {
    File versionFile = new File("src/main/java/org/photonvision/PhotonVersion.java")
    versionFile.delete()
    versionFile << "package org.photonvision;\n" +
            "\n" +
            "/*\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()) +
            "}"
}

build.dependsOn writeCurrentVersionJava