versions.gradle

def versionFiles = [new File('vscode-wpilib/package.json'), new File('wpilib-utility-standalone/package.json')]
def oldVersionFile = new File("$buildDir/existingVersions.json")

task updateVersions(type: Task) {
    doLast {
        def existingVersions = []

        versionFiles.each {
            def file = it

            def parsedJson = new groovy.json.JsonSlurper().parseText(file.text)

            def existingVersion = new Expando();
            existingVersion.version = parsedJson.version

            existingVersion.file = file.toString()

            existingVersions << existingVersion

            parsedJson.version = pubVersion

            def converted = groovy.json.JsonOutput.prettyPrint(groovy.json.JsonOutput.toJson(parsedJson))

            file.text = converted
        }
        if (oldVersionFile.exists()) {
            return
        }

            oldVersionFile.parentFile.mkdirs()

            oldVersionFile.text = groovy.json.JsonOutput.prettyPrint(groovy.json.JsonOutput.toJson(existingVersions))
    }
}

task resetVersions(type: Task) {
    doLast {
        def oldVersions = new groovy.json.JsonSlurper().parseText(oldVersionFile.text)
        versionFiles.each {
            def file = it

            def parsedJson = new groovy.json.JsonSlurper().parseText(file.text)
            for (Object oldv : oldVersions) {
                if (file.toString().equals(oldv.file)) {
                    parsedJson.version = oldv.version
                    break
                }
            }
            def converted = groovy.json.JsonOutput.prettyPrint(groovy.json.JsonOutput.toJson(parsedJson))

            file.text = converted
        }
        oldVersionFile.delete()
    }
}