fn parse_version_requirements()

in yaml_test_runner/src/step/skip.rs [56:90]
35 lines of code
5 McCabe index (conditional complexity)

    fn parse_version_requirements(version: &Option<String>) -> Option<semver::VersionReq> {
        if let Some(v) = version {
            if v.to_lowercase() == "all" {
                Some(semver::VersionReq::STAR)
            } else {
                lazy_static! {
                    static ref VERSION_REGEX: Regex =
                        Regex::new(r"^([\w\.]+)?\s*?\-\s*?([\w\.]+)?$").unwrap();
                }
                if let Some(c) = VERSION_REGEX.captures(v) {
                    match (c.get(1), c.get(2)) {
                        (Some(start), Some(end)) => Some(
                            semver::VersionReq::parse(
                                format!(">={},<={}", start.as_str(), end.as_str()).as_ref(),
                            )
                            .unwrap(),
                        ),
                        (Some(start), None) => Some(
                            semver::VersionReq::parse(format!(">={}", start.as_str()).as_ref())
                                .unwrap(),
                        ),
                        (None, Some(end)) => Some(
                            semver::VersionReq::parse(format!("<={}", end.as_str()).as_ref())
                                .unwrap(),
                        ),
                        (None, None) => None,
                    }
                } else {
                    None
                }
            }
        } else {
            None
        }
    }