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let get_log_level () =
match Sys.getenv_opt "LOG_LEVEL" with
| Some "debug" -> Some Logs.Debug
| Some "error" -> Some Logs.Error
| Some "warning" -> Some Logs.Warning
| _ -> Some Logs.Info
;;
let logs_dir () =
match
Core_configuration.root_path (), Core_configuration.read_string "LOGS_DIR"
with
| _, Some logs_dir -> logs_dir
| Some root, None -> root ^ "/logs"
| None, None -> "logs"
;;
let lwt_file_reporter () =
let logs_dir = logs_dir () in
let buf () =
let b = Buffer.create 512 in
( b
, fun () ->
let m = Buffer.contents b in
Buffer.reset b;
m )
in
let app, app_flush = buf () in
let err, err_flush = buf () in
let report src level ~over k msgf =
let k _ = k () in
let write () =
let name =
match level with
| Logs.Error -> logs_dir ^ "/error.log"
| _ -> logs_dir ^ "/app.log"
in
let%lwt log =
Lwt_io.open_file
~flags:[ Unix.O_WRONLY; Unix.O_CREAT; Unix.O_APPEND ]
~perm:0o777
~mode:Lwt_io.Output
name
in
let%lwt () =
match level with
| Logs.Error -> Lwt_io.write log (err_flush ())
| _ -> Lwt_io.write log (app_flush ())
in
Lwt_io.close log
in
let unblock () =
over ();
Lwt.return_unit
in
Lwt.finalize write unblock |> Lwt.ignore_result;
msgf
@@ fun ?header:_ ?tags:_ fmt ->
let now = Ptime_clock.now () |> Ptime.to_rfc3339 in
match level with
| Logs.Error ->
let ppf = Format.formatter_of_buffer err in
Format.kfprintf
k
ppf
("%s [%s]: @[" ^^ fmt ^^ "@]@.")
now
(Logs.Src.name src)
| _ ->
let ppf = Format.formatter_of_buffer app in
Format.kfprintf
k
ppf
("%s [%a] [%s]: @[" ^^ fmt ^^ "@]@.")
now
Logs.pp_level
level
(Logs.Src.name src)
in
{ Logs.report }
;;
let app_style = `Cyan
let err_style = `Red
let warn_style = `Yellow
let info_style = `Blue
let debug_style = `Green
let source_style = `Magenta
let ~pp_h ppf (l, h) =
match l with
| Logs.App ->
(match h with
| None -> ()
| Some h -> Fmt.pf ppf "[%a] " Fmt.(styled app_style string) h)
| Logs.Error ->
pp_h
ppf
err_style
(match h with
| None -> "ERROR"
| Some h -> h)
| Logs.Warning ->
pp_h
ppf
warn_style
(match h with
| None -> "WARNING"
| Some h -> h)
| Logs.Info ->
pp_h
ppf
info_style
(match h with
| None -> "INFO"
| Some h -> h)
| Logs.Debug ->
pp_h
ppf
debug_style
(match h with
| None -> "DEBUG"
| Some h -> h)
;;
let pp_source = Fmt.(styled source_style string)
let src =
let pp_h ppf style h =
let src = Logs.Src.name src in
let now = Ptime_clock.now () |> Ptime.to_rfc3339 in
Fmt.pf ppf "%s [%a] [%a]: " now Fmt.(styled style string) h pp_source src
in
pp_header ~pp_h
;;
let format_reporter
?( = pp_exec_header)
?(app = Format.std_formatter)
?(dst = Format.err_formatter)
()
=
let report src level ~over k msgf =
let k _ =
over ();
k ()
in
msgf
@@ fun ? ?tags:_ fmt ->
let ppf = if level = Logs.App then app else dst in
Format.kfprintf
k
ppf
("%a@[" ^^ fmt ^^ "@]@.")
(pp_header src)
(level, header)
in
{ Logs.report }
;;
let cli_reporter ?( = pp_exec_header) ?app ?dst () =
Fmt_tty.setup_std_outputs ();
format_reporter ~pp_header ?app ?dst ()
;;
let combine r1 r2 =
let report src level ~over k msgf =
let v = r1.Logs.report src level ~over:(fun () -> ()) k msgf in
r2.Logs.report src level ~over (fun () -> v) msgf
in
{ Logs.report }
;;
let default_reporter =
Logs.set_level (get_log_level ());
let r1 = lwt_file_reporter () in
let r2 = cli_reporter () in
combine r1 r2
;;