Function swapURLHost

pkg/cmd/api/http.go:164–175

swapURLHost replaces the host component of rawURL with newHost, preserving scheme, port (if already present in rawURL), path, and query unchanged.

(rawURL, newHost string)

// swapURLHost replaces the host component of rawURL with newHost, preserving
// scheme, port (if already present in rawURL), path, and query unchanged.
func swapURLHost(rawURL, newHost string) string {
	u, err := url.Parse(rawURL)
	if err != nil {
		// rawURL is always a well-formed URL built by ghinstance.GraphQLEndpoint
		// or ghinstance.RESTPrefix, so this error is unreachable in practice. If it
		// did occur, returning the input unchanged leaves the request pointed at the
		// original host, which is safe (no host swap, but request still succeeds).
		return rawURL
	}
	u.Host = newHost
	return u.String()
}