val return : 'a -> 'a tval get_time : unit -> float tget_time () should returns a float like Unix.gettimeofday ().
val file_exists : Filepath.t -> bool tfile_exists path should returns true if path exists (as a file or a directory), false otherwise.
val target_exists : Filepath.t -> bool tSame of file_exists but acting on the target.
val is_directory : Filepath.t -> bool tis_directory path should returns true if path is an existing file and if the file is a directory, false otherwise.
val get_modification_time : Filepath.t -> int Try.t tget_modification_time path should returns a Try.t containing the modification time (as an integer) of the given file. The function may fail.
val target_modification_time : Filepath.t -> int Try.t tSame of get_modification_time but acting on the target.
val read_file : Filepath.t -> string Try.t tread_file path should returns a Try.t containing the content (as a string) of the given file. The function may fail.
val content_changes : Filepath.t -> string -> bool Try.t tcontent_changes filepath new_content check if the content of the file has been changed.
val write_file : Filepath.t -> string -> unit Try.t twrite_file path content should write (create or overwrite) content into the given path. The function may fail.
val read_dir : Filepath.t -> Filepath.t list tread_dir path should returns a list of children. The function is pretty optimistic if the directory does not exist, or for any other possible reason the function should fail, it will return an empty list.
val create_dir : ?file_perm:int -> Filepath.t -> unit tcreate_dir path is an optimistic version of mkdir -p, the function extract the directory of a file and create it if it does not exists without any failure.
val command : string -> int tcommand cmd performs a shell commands and returns the exit code.