X-Git-Url: https://git.xandkar.net/?p=dups.git;a=blobdiff_plain;f=dups.ml;h=1483754f4103268754678c9f63c4b59d1b6ac1f9;hp=a1dca83c2e923745d5cf821f3654c0423dbe0a0b;hb=refs%2Fheads%2Fmulti-samples;hpb=1f130f74d08198f0c800ae84e1fbb4b94695e426 diff --git a/dups.ml b/dups.ml index a1dca83..1483754 100644 --- a/dups.ml +++ b/dups.ml @@ -1,132 +1,241 @@ open Printf -module Array = ArrayLabels -module List = ListLabels - -module Stream : sig - type 'a t - - val create : (unit -> 'a option) -> 'a t - - val iter : 'a t -> f:('a -> unit) -> unit -end = struct - module S = Stream - - type 'a t = - 'a S.t - - let create f = - S.from (fun _ -> f ()) - - let iter t ~f = - S.iter f t -end - -module In_channel : sig - val lines : in_channel -> string Stream.t -end = struct - let lines ic = - Stream.create (fun () -> - match input_line ic with - | exception End_of_file -> - None - | line -> - Some line - ) -end - -module Directory : sig - val find_files : string -> string Stream.t -end = struct - let find_files root = - let dirs = Queue.create () in - let files = Queue.create () in - let explore parent = - Array.iter (Sys.readdir parent) ~f:(fun child -> - let path = Filename.concat parent child in - let {Unix.st_kind = file_kind; _} = Unix.lstat path in - match file_kind with - | Unix.S_REG -> - Queue.add path files - | Unix.S_DIR -> - Queue.add path dirs - | Unix.S_CHR - | Unix.S_BLK - | Unix.S_LNK - | Unix.S_FIFO - | Unix.S_SOCK -> - () - ) - in - let next_dir () = - match Queue.take dirs with - | exception Queue.Empty -> - () - | dir -> - explore dir - in - let next_file () = - match Queue.take files with - | exception Queue.Empty -> - None - | file_path -> - Some file_path - in - explore root; - Stream.create (fun () -> - next_dir (); - next_file () - ) -end +module List = ListLabels +module StrSet = Set.Make(String) +module Unix = UnixLabels + +module M = Metrics type input = - | Root_path of string - | Paths_on_stdin + | Stdin + | Directories of string list + +type output = + | Stdout + | Directory of string -let main input = - let paths = +type opt = + { input : input + ; output : output + ; ignore : string -> bool + ; sample : int + ; njobs : int + ; delim_null : bool + } + +let make_input_stream input ignore ~metrics ~delim_null = + let input = match input with - | Paths_on_stdin -> In_channel.lines stdin - | Root_path root -> Directory.find_files root + | Stdin -> + File.lookup (In_channel.lines stdin ~delim_null) + | Directories paths -> + let paths = StrSet.elements (StrSet.of_list paths) in + Stream.concat (List.map paths ~f:File.find) + in + Stream.filter input ~f:(fun {File.path; size} -> + M.file_considered metrics ~size; + let empty = size = 0 in + let ignored = ignore path in + if empty then M.file_empty metrics; + if ignored then M.file_ignored metrics ~size; + (not empty) && (not ignored) + ) + +let make_output_fun = function + | Stdout -> + fun digest n_files files -> + printf "%s %d\n%!" (Digest.to_hex digest) n_files; + List.iter files ~f:(fun {File.path; _} -> + printf " %S\n%!" path + ) + | Directory dir -> + fun digest _ files -> + let digest = Digest.to_hex digest in + let dir = Filename.concat dir (String.sub digest 0 2) in + Unix.mkdir dir ~perm:0o700; + let oc = open_out (Filename.concat dir digest) in + List.iter files ~f:(fun {File.path; _} -> + output_string oc (sprintf "%S\n%!" path) + ); + close_out oc + +let time_wall () = + Unix.gettimeofday () + +let time_proc () = + Sys.time () + +let main {input; output; ignore; sample = sample_len; njobs; delim_null} = + let wt0_all = time_wall () in + let pt0_all = time_proc () in + let metrics = M.init () in + let output = make_output_fun output in + let input = make_input_stream input ignore ~metrics ~delim_null in + (* TODO: Make a nice(r) abstraction to re-assemble pieces in the pipeline: + * + * from input to files_by_size + * from files_by_size to files_by_sample + * from files_by_sample to files_by_digest + * from files_by_digest to output + * + * input |> files_by_size |> files_by_sample |> files_by_digest |> output + *) + + let files = input in + + let wt0_group_by_size = time_wall () in + let pt0_group_by_size = time_proc () in + eprintf "[debug] filtering-out files with unique size\n%!"; + let files = File.filter_out_unique_sizes files ~metrics in + let pt1_group_by_size = time_proc () in + let wt1_group_by_size = time_wall () in + + let wt0_group_by_sample = wt1_group_by_size in + let pt0_group_by_sample = pt1_group_by_size in + eprintf "[debug] filtering-out files with unique heads\n%!"; + let files = + if njobs > 1 then begin + let q = Queue.create () in + files + |> Stream.bag_map ~njobs ~f:(File.head ~len:sample_len ~metrics) + |> Stream.group_by ~f:snd + |> Stream.map ~f:(fun (d, n, pairs) -> (d, n, List.map pairs ~f:fst)) + |> Stream.filter ~f:(fun (_, n, _) -> n > 1) + |> Stream.iter ~f:(fun (_, _, fs) -> List.iter fs ~f:(fun f -> Queue.add f q)) + ; + Stream.of_queue q + end else + File.filter_out_unique_heads files ~len:sample_len ~metrics in - let paths_by_digest = Hashtbl.create 1_000_000 in - let path_count = ref 0 in - let t0 = Sys.time () in - Stream.iter paths ~f:(fun path -> - incr path_count; - try - let digest = Digest.file path in - let paths = - match Hashtbl.find_opt paths_by_digest digest with - | None -> - [] - | Some paths -> - paths + let pt1_group_by_sample = time_proc () in + let wt1_group_by_sample = time_wall () in + + let wt0_group_by_digest = wt1_group_by_sample in + let pt0_group_by_digest = pt1_group_by_sample in + eprintf "[debug] hashing\n%!"; + let groups = + if njobs > 1 then + let with_digests = + Stream.bag_map files ~njobs ~f:(fun {File.path; _} -> Digest.file path) in - Hashtbl.replace paths_by_digest digest (path :: paths) - with Sys_error e -> - eprintf "WARNING: Failed to process %S: %S\n%!" path e + Stream.map (Stream.group_by with_digests ~f:snd) ~f:( + fun (digest, n, file_digest_pairs) -> + let files = + List.map file_digest_pairs ~f:(fun (file, _) -> + M.file_hashed metrics ~size:file.File.size; + file + ) + in + (digest, n, files) + ) + else + Stream.group_by files ~f:(fun {File.path; size} -> + M.file_hashed metrics ~size; + Digest.file path + ) + in + let pt1_group_by_digest = time_proc () in + let wt1_group_by_digest = time_wall () in + + eprintf "[debug] reporting\n%!"; + Stream.iter groups ~f:(fun (d, n, files) -> + M.digest metrics; + if n > 1 then begin + M.redundant_data metrics ~size:(n * (List.hd files).File.size); + output d n files + end ); - Hashtbl.iter - (fun digest paths -> - let n_paths = List.length paths in - if n_paths > 1 then begin - printf "%s %d\n%!" (Digest.to_hex digest) n_paths; - List.iter paths ~f:(fun path -> printf " %s\n%!" path) - end - ) - paths_by_digest; - let t1 = Sys.time () in - eprintf "Processed %d files in %f seconds.\n%!" !path_count (t1 -. t0) -let () = - let input = ref Paths_on_stdin in - Arg.parse [] (fun path -> - if Sys.file_exists path then - input := Root_path path - else begin - eprintf "File does not exist: %S\n%!" path; + let pt1_all = time_proc () in + let wt1_all = time_wall () in + + M.report metrics + ~wall_time_all: (wt1_all -. wt0_all) + ~wall_time_group_by_size: (wt1_group_by_size -. wt0_group_by_size) + ~wall_time_group_by_head: (wt1_group_by_sample -. wt0_group_by_sample) + ~wall_time_group_by_digest:(wt1_group_by_digest -. wt0_group_by_digest) + ~proc_time_all: (pt1_all -. pt0_all) + ~proc_time_group_by_size: (pt1_group_by_size -. pt0_group_by_size) + ~proc_time_group_by_head: (pt1_group_by_sample -. pt0_group_by_sample) + ~proc_time_group_by_digest:(pt1_group_by_digest -. pt0_group_by_digest) + +let get_opt () : opt = + let assert_ test x msg = + if not (test x) then begin + eprintf "%s\n%!" msg; exit 1 end - ) ""; - main !input + in + let assert_file_exists path = + assert_ Sys.file_exists path (sprintf "File does not exist: %S" path) + in + let assert_file_is_dir path = + assert_ Sys.is_directory path (sprintf "File is not a directory: %S" path) + in + let input = ref Stdin in + let output = ref Stdout in + let ignore = ref (fun _ -> false) in + let sample = ref 512 in + let njobs = ref 6 in + let input_delim_null = ref false in + let spec = + [ ( "-out" + , Arg.String (fun path -> + assert_file_exists path; + assert_file_is_dir path; + output := Directory path + ) + , " Output to this directory instead of stdout." + ) + ; ( "-ignore" + , Arg.String (fun regexp -> + let regexp = Str.regexp regexp in + ignore := fun string -> Str.string_match regexp string 0) + , " Ignore file paths which match this regexp pattern (see Str module)." + ) + ; ( "-sample" + , Arg.Set_int sample + , (sprintf " Byte size of file samples to use. Default: %d" !sample) + ) + ; ( "-j" + , Arg.Set_int njobs + , (sprintf " Number of parallel jobs. Default: %d" !njobs) + ) + ; ( "-0" + , Arg.Set input_delim_null + , ( sprintf + ( " Delimit input paths by null character instead of a newline." + ^^" Meaningful only when reading candidate paths from stdin." + ^^" Default: %B" + ) + !input_delim_null + ) + ) + ] + in + Arg.parse + (Arg.align spec) + (fun path -> + assert_file_exists path; + assert_file_is_dir path; + match !input with + | Stdin -> + input := Directories [path] + | Directories paths -> + input := Directories (path :: paths) + ) + ""; + assert_ + (fun x -> x > 0) + !sample + (sprintf "Sample size cannot be negative: %d" !sample); + { input = !input + ; output = !output + ; ignore = !ignore + ; sample = !sample + ; njobs = !njobs + ; delim_null = !input_delim_null + } + +let () = + main (get_opt ())