const origin = pattern
    let negative = false

    // > An optional prefix "!" which negates the pattern;
    if (pattern.indexOf('!') === 0) {
        negative = true
        pattern = pattern.substr(1)
    }

    pattern = pattern
        // > Put a backslash ("\") in front of the first "!" for patterns that
        // >   begin with a literal "!", for example, `"\!important!.txt"`.

    if (os == Os.WINDOWS) {
        script {
            name = "SETUP_VIRTUAL_DISK_FOR_PERF_TEST"
            executionMode = BuildStep.ExecutionMode.ALWAYS
            scriptContent = """
                subst p: /d
                subst p: "%teamcity.build.checkoutDir%"
            """.trimIndent()
            skipConditionally()
        }
    }
}

fun BuildType.cleanUpGitUntrackedFilesAndDirectories() {
    steps {