func supportsShallowClone()

in scan/git.go [264:293]

• 20 lines of code
• 8 McCabe index (conditional complexity)

func supportsShallowClone(remoteURL string) bool {
	if urlutil.IsURL(remoteURL) {
		// Check if the HTTP server is smart

		// Smart servers must correctly respond to a query for the git-upload-pack service
		serviceURL := remoteURL + "/info/refs?service=git-upload-pack"

		// Try a HEAD request and fallback to a Get request on error
		res, err := http.Head(serviceURL)
		if err != nil || res.StatusCode != http.StatusOK {
			res, err = http.Get(serviceURL)
			if err == nil {
				_ = res.Body.Close()
			}
			if err != nil || res.StatusCode != http.StatusOK {
				// request failed
				return false
			}
		}

		if res.Header.Get("Content-Type") != "application/x-git-upload-pack-advertisement" {
			// Fallback, not a smart server
			return false
		}
		return true
	}

	// Non-HTTP protocols always support shallow clones
	return true
}