robur/opam-mirror
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use marshal as suggested by @reynir

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This commit is contained in:
Hannes Mehnert 2024-11-22 12:27:44 +01:00
parent 1e5d412d2d
commit 4ae84869bb
1 changed files with 11 additions and 20 deletions
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31
mirage/unikernel.ml
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@ -723,27 +723,18 @@ stamp: %S
mutable index : string ;
}
let to_string { commit_id ; modified ; repo ; index } =
String.concat ";" [ commit_id ; modified ; repo ; index ]
let marshal t =
let version = char_of_int 1 in
String.make 1 version ^ Marshal.to_string t []
let of_string str =
match String.index_opt str ';' with
| None -> Error (`Msg "no separator found")
| Some commit_end ->
match String.index_from_opt str (succ commit_end) ';' with
| None -> Error (`Msg "no separator found")
| Some modified_end ->
match String.index_from_opt str (succ modified_end) ';' with
| None -> Error (`Msg "no separator found")
| Some repo_end ->
let last_chunk = String.length str - succ repo_end in
Ok { commit_id = String.sub str 0 commit_end ;
modified = String.sub str (succ commit_end) modified_end ;
repo = String.sub str (succ modified_end) repo_end ;
index = String.sub str (succ repo_end) last_chunk }
let unmarshal s =
let version = int_of_char s.[0] in
match version with
| 1 -> Ok (Marshal.from_string s 1)
| _ -> Error ("Unsupported version " ^ string_of_int version)
let dump_index index_dump t =
let data = to_string t in
let data = marshal t in
Cache.write index_dump data >|= function
| Ok () ->
Logs.info (fun m -> m "dumped index %d bytes" (String.length data))
@ -757,8 +748,8 @@ stamp: %S
Logs.warn (fun m -> m "failed to read index state: %a" Cache.pp_error e);
Error ()
| Ok Some data ->
match of_string data with
| Error `Msg msg ->
match unmarshal data with
| Error msg ->
Logs.warn (fun m -> m "failed to decode index: %s" msg);
Error ()
| Ok t -> Ok t