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Shell: improve Lwt_utils

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This commit is contained in:
Grégoire Henry 2017-01-23 11:09:39 +01:00
parent 31872eb1b1
commit a65ad52620
2 changed files with 12 additions and 6 deletions
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16
src/utils/lwt_utils.ml
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@ -346,12 +346,14 @@ let remove_dir dir =
Lwt.return ()
let rec create_dir ?(perm = 0o755) dir =
if Sys.file_exists dir then
Lwt.return ()
else begin
create_dir (Filename.dirname dir) >>= fun () ->
Lwt_unix.mkdir dir perm
end
Lwt_unix.file_exists dir >>= function
| false ->
create_dir (Filename.dirname dir) >>= fun () ->
Lwt_unix.mkdir dir perm
| true ->
Lwt_unix.stat dir >>= function
| {st_kind = S_DIR} -> Lwt.return_unit
| _ -> failwith "Not a directory"
let create_file ?(perm = 0o644) name content =
Lwt_unix.openfile name Unix.([O_TRUNC; O_CREAT; O_WRONLY]) perm >>= fun fd ->
@ -402,4 +404,6 @@ let with_timeout ?(canceler = Canceler.create ()) timeout f =
Canceler.cancel canceler >>= fun () ->
fail Timeout
let unless cond f =
if cond then Lwt.return () else f ()

2
src/utils/lwt_utils.mli
View File

@ -67,3 +67,5 @@ val with_timeout:
?canceler:Canceler.t ->
float -> (Canceler.t -> 'a tzresult Lwt.t) -> 'a tzresult Lwt.t
val unless: bool -> (unit -> unit Lwt.t) -> unit Lwt.t