}

// IsRevisionQuery returns true if vers is a version query that may refer to
// a particular version or revision in a repository like "v1.0.0", "master",
// or "0123abcd". IsRevisionQuery returns false if vers is a query that
// chooses from among available versions like "latest" or ">v1.0.0".
func IsRevisionQuery(path, vers string) bool {
	if vers == "latest" ||
		vers == "upgrade" ||

					// actually upgrading from.
					// mgErr is already set, so just skip this module.
					continue
				}
			}

			allowed := CheckAllowed
			if IsRevisionQuery(path, vers) || mode&ListRetracted != 0 {
				// Allow excluded and retracted versions if the user asked for a
				// specific revision or used 'go list -retracted'.
				allowed = nil
			}

	modload.RootMode = modload.NoRoot
	modload.Init()
	defer modload.Reset()

	// See internal/load.PackagesAndErrorsOutsideModule
	ctx := context.Background()
	allowed := modload.CheckAllowed
	if modload.IsRevisionQuery(path, version) {
		// Don't check for retractions if a specific revision is requested.
		allowed = nil
	}
	noneSelected := func(path string) (version string) { return "none" }

	// (first result). It's possible this module won't provide packages named by
	// later arguments, and other modules would. Let's not try to be too
	// magical though.
	allowed := modload.CheckAllowed
	if modload.IsRevisionQuery(firstPath, version) {
		// Don't check for retractions if a specific revision is requested.
		allowed = nil
	}
	noneSelected := func(path string) (version string) { return "none" }