open Printf
-module Array = ArrayLabels
-module List = ListLabels
-module StrSet= Set.Make(String)
-module Unix = UnixLabels
+module List = ListLabels
+module StrSet = Set.Make(String)
+module Unix = UnixLabels
-module Stream : sig
- type 'a t
-
- val create : (unit -> 'a option) -> 'a t
-
- val iter : 'a t -> f:('a -> unit) -> unit
-
- val map : 'a t -> f:('a -> 'b) -> 'b t
-
- val filter : 'a t -> f:('a -> bool) -> 'a t
-
- val concat : ('a t) list -> 'a t
-end = struct
- module S = Stream
-
- type 'a t =
- {mutable streams : ('a S.t) list}
-
- let create f =
- {streams = [S.from (fun _ -> f ())]}
-
- let rec next t =
- match t.streams with
- | [] ->
- None
- | s :: streams ->
- (match S.next s with
- | exception Stream.Failure ->
- t.streams <- streams;
- next t
- | x ->
- Some x
- )
-
- let map t ~f =
- create (fun () ->
- match next t with
- | None -> None
- | Some x -> Some (f x)
- )
-
- let filter t ~f =
- let rec filter () =
- match next t with
- | None ->
- None
- | Some x when f x ->
- Some x
- | Some _ ->
- filter ()
- in
- create filter
-
- let iter t ~f =
- List.iter t.streams ~f:(S.iter f)
-
- let concat ts =
- {streams = List.concat (List.map ts ~f:(fun {streams} -> streams))}
-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 File : sig
- type t =
- { path : string
- ; size : int
- }
-
- val find : string -> t Stream.t
- (** Find all files in the directory tree, starting from the given root path *)
-
- val lookup : string Stream.t -> t Stream.t
- (** Lookup file info for given paths *)
-end = struct
- type t =
- { path : string
- ; size : int
- }
-
- let lookup paths =
- Stream.map paths ~f:(fun path ->
- let {Unix.st_size = size; _} = Unix.lstat path in
- {path; size}
- )
-
- let find 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; st_size; _} = Unix.lstat path in
- match file_kind with
- | Unix.S_REG ->
- let file = {path; size = st_size} in
- Queue.add file files
- | Unix.S_DIR ->
- Queue.add path dirs
- | Unix.S_CHR
- | Unix.S_BLK
- | Unix.S_LNK
- | Unix.S_FIFO
- | Unix.S_SOCK ->
- ()
- )
- in
- explore root;
- let rec next () =
- match Queue.is_empty files, Queue.is_empty dirs with
- | false, _ -> Some (Queue.take files)
- | true , true -> None
- | true , false ->
- explore (Queue.take dirs);
- next ()
- in
- Stream.create next
-end
+module M = Metrics
type input =
| Stdin
type opt =
{ input : input
; output : output
- ; ignore : Str.regexp option
- }
-
-type count =
- { considered : int ref
- ; empty : int ref
- ; ignored : int ref
- ; unique_size : int ref
- ; hashed : int ref
+ ; ignore : string -> bool
+ ; sample : int
+ ; njobs : int
+ ; delim_null : bool
}
-let make_input_stream input ignore count =
+let make_input_stream input ignore ~metrics ~delim_null =
let input =
match input with
| Stdin ->
- File.lookup (In_channel.lines 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} ->
- incr count.considered;
+ M.file_considered metrics ~size;
let empty = size = 0 in
- let ignored =
- match ignore with
- | Some regexp when (Str.string_match regexp path 0) ->
- true
- | Some _ | None ->
- false
- in
- if empty then incr count.empty;
- if ignored then incr count.ignored;
+ 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_paths paths ->
- printf "%s %d\n%!" (Digest.to_hex digest) n_paths;
- List.iter (StrSet.elements paths) ~f:(printf " %S\n%!")
+ 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 _ paths ->
+ 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 (StrSet.elements paths) ~f:(fun path ->
+ List.iter files ~f:(fun {File.path; _} ->
output_string oc (sprintf "%S\n%!" path)
);
close_out oc
-let main {input; output; ignore} =
- let t0 = Sys.time () in
- let count =
- { considered = ref 0
- ; empty = ref 0
- ; ignored = ref 0
- ; unique_size = ref 0
- ; hashed = ref 0
- }
- in
+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 count in
- let paths_by_size = Hashtbl.create 1_000_000 in
- let paths_by_digest = Hashtbl.create 1_000_000 in
- let process tbl path ~f =
- let key = f path in
- let count, paths =
- match Hashtbl.find_opt tbl key with
- | None ->
- (0, StrSet.empty)
- | Some (n, paths) ->
- (n, paths)
- in
- Hashtbl.replace tbl key (count + 1, StrSet.add path paths)
+ 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 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
+ 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
- Stream.iter input ~f:(fun {File.path; size} ->
- process paths_by_size path ~f:(fun _ -> size)
+ 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 _ (n, paths) ->
- (* Skip files with unique sizes *)
- if n > 1 then
- StrSet.iter
- (fun path ->
- incr count.hashed;
- process paths_by_digest path ~f:Digest.file
- )
- paths
- else
- incr count.unique_size;
- )
- paths_by_size;
- Hashtbl.iter (fun d (n, ps) -> if n > 1 then output d n ps) paths_by_digest;
- let t1 = Sys.time () in
- eprintf "Time : %f seconds\n%!" (t1 -. t0);
- eprintf "Considered : %d\n%!" !(count.considered);
- eprintf "Hashed : %d\n%!" !(count.hashed);
- eprintf "Skipped due to 0 size : %d\n%!" !(count.empty);
- eprintf "Skipped due to unique size : %d\n%!" !(count.unique_size);
- eprintf "Ignored due to regex match : %d\n%!" !(count.ignored)
+
+ 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 =
in
let input = ref Stdin in
let output = ref Stdout in
- let ignore = ref None 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 ->
, " Output to this directory instead of stdout."
)
; ( "-ignore"
- , Arg.String (fun regexp -> ignore := Some (Str.regexp regexp))
+ , 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
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 () =
home / code / dups.git / blobdiff