in Sources/Hub/HubApi.swift [588:600]
func getFileMetadata(url: URL) async throws -> FileMetadata {
let (_, response) = try await httpHead(for: url)
let location = response.statusCode == 302 ? response.value(forHTTPHeaderField: "Location") : response.url?.absoluteString
return FileMetadata(
commitHash: response.value(forHTTPHeaderField: "X-Repo-Commit"),
etag: normalizeEtag(
(response.value(forHTTPHeaderField: "X-Linked-Etag")) ?? (response.value(forHTTPHeaderField: "Etag"))
),
location: location ?? url.absoluteString,
size: Int(response.value(forHTTPHeaderField: "X-Linked-Size") ?? response.value(forHTTPHeaderField: "Content-Length") ?? "")
)
}