Commit | Line | Data |
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cce97c27 SK |
1 | open Printf |
2 | ||
948ee900 SK |
3 | module Array = ArrayLabels |
4 | module List = ListLabels | |
5c0100d2 | 5 | module StrSet = Set.Make(String) |
e09dff7f | 6 | module Unix = UnixLabels |
cce97c27 SK |
7 | |
8 | module Stream : sig | |
948ee900 | 9 | type 'a t |
e13e9ef5 SK |
10 | |
11 | val create : (unit -> 'a option) -> 'a t | |
12 | ||
948ee900 | 13 | val iter : 'a t -> f:('a -> unit) -> unit |
8673c3a5 | 14 | |
a9a56d74 SK |
15 | val map : 'a t -> f:('a -> 'b) -> 'b t |
16 | ||
17 | val filter : 'a t -> f:('a -> bool) -> 'a t | |
18 | ||
8673c3a5 | 19 | val concat : ('a t) list -> 'a t |
cce97c27 SK |
20 | end = struct |
21 | module S = Stream | |
22 | ||
948ee900 | 23 | type 'a t = |
a9a56d74 | 24 | {mutable streams : ('a S.t) list} |
948ee900 | 25 | |
e13e9ef5 | 26 | let create f = |
a9a56d74 SK |
27 | {streams = [S.from (fun _ -> f ())]} |
28 | ||
29 | let rec next t = | |
30 | match t.streams with | |
31 | | [] -> | |
32 | None | |
33 | | s :: streams -> | |
34 | (match S.next s with | |
35 | | exception Stream.Failure -> | |
36 | t.streams <- streams; | |
37 | next t | |
38 | | x -> | |
39 | Some x | |
40 | ) | |
41 | ||
42 | let map t ~f = | |
43 | create (fun () -> | |
44 | match next t with | |
45 | | None -> None | |
46 | | Some x -> Some (f x) | |
47 | ) | |
48 | ||
49 | let filter t ~f = | |
50 | let rec filter () = | |
51 | match next t with | |
52 | | None -> | |
53 | None | |
54 | | Some x when f x -> | |
55 | Some x | |
56 | | Some _ -> | |
57 | filter () | |
58 | in | |
59 | create filter | |
e13e9ef5 SK |
60 | |
61 | let iter t ~f = | |
a9a56d74 | 62 | List.iter t.streams ~f:(S.iter f) |
8673c3a5 SK |
63 | |
64 | let concat ts = | |
a9a56d74 | 65 | {streams = List.concat (List.map ts ~f:(fun {streams} -> streams))} |
e13e9ef5 SK |
66 | end |
67 | ||
68 | module In_channel : sig | |
69 | val lines : in_channel -> string Stream.t | |
70 | end = struct | |
71 | let lines ic = | |
72 | Stream.create (fun () -> | |
73 | match input_line ic with | |
74 | | exception End_of_file -> | |
75 | None | |
76 | | line -> | |
77 | Some line | |
78 | ) | |
79 | end | |
80 | ||
a9a56d74 SK |
81 | module File : sig |
82 | type t = | |
83 | { path : string | |
84 | ; size : int | |
85 | } | |
86 | ||
87 | val find : string -> t Stream.t | |
88 | (** Find all files in the directory tree, starting from the given root path *) | |
89 | ||
90 | val lookup : string Stream.t -> t Stream.t | |
91 | (** Lookup file info for given paths *) | |
5c0100d2 SK |
92 | |
93 | module Set : sig include Set.S with type elt := t end | |
e13e9ef5 | 94 | end = struct |
a9a56d74 SK |
95 | type t = |
96 | { path : string | |
97 | ; size : int | |
98 | } | |
99 | ||
5c0100d2 SK |
100 | let compare {path=p1; _} {path=p2; _} = |
101 | Stdlib.compare p1 p2 | |
102 | ||
a9a56d74 SK |
103 | let lookup paths = |
104 | Stream.map paths ~f:(fun path -> | |
105 | let {Unix.st_size = size; _} = Unix.lstat path in | |
106 | {path; size} | |
107 | ) | |
108 | ||
109 | let find root = | |
948ee900 SK |
110 | let dirs = Queue.create () in |
111 | let files = Queue.create () in | |
948ee900 SK |
112 | let explore parent = |
113 | Array.iter (Sys.readdir parent) ~f:(fun child -> | |
114 | let path = Filename.concat parent child in | |
a9a56d74 | 115 | let {Unix.st_kind = file_kind; st_size; _} = Unix.lstat path in |
948ee900 SK |
116 | match file_kind with |
117 | | Unix.S_REG -> | |
a9a56d74 SK |
118 | let file = {path; size = st_size} in |
119 | Queue.add file files | |
948ee900 SK |
120 | | Unix.S_DIR -> |
121 | Queue.add path dirs | |
122 | | Unix.S_CHR | |
123 | | Unix.S_BLK | |
124 | | Unix.S_LNK | |
125 | | Unix.S_FIFO | |
126 | | Unix.S_SOCK -> | |
127 | () | |
128 | ) | |
129 | in | |
1f130f74 | 130 | explore root; |
c66266c6 SK |
131 | let rec next () = |
132 | match Queue.is_empty files, Queue.is_empty dirs with | |
133 | | false, _ -> Some (Queue.take files) | |
134 | | true , true -> None | |
135 | | true , false -> | |
136 | explore (Queue.take dirs); | |
137 | next () | |
138 | in | |
139 | Stream.create next | |
5c0100d2 SK |
140 | |
141 | module Set = Set.Make(struct | |
142 | type elt = t | |
143 | type t = elt | |
144 | let compare = compare | |
145 | end) | |
cce97c27 SK |
146 | end |
147 | ||
948ee900 | 148 | type input = |
cfcdf90a SK |
149 | | Stdin |
150 | | Directories of string list | |
948ee900 | 151 | |
e09dff7f SK |
152 | type output = |
153 | | Stdout | |
154 | | Directory of string | |
155 | ||
1253df34 SK |
156 | type opt = |
157 | { input : input | |
158 | ; output : output | |
159 | ; ignore : Str.regexp option | |
7a0486be | 160 | ; sample : int |
1253df34 SK |
161 | } |
162 | ||
a9a56d74 | 163 | type count = |
487389a4 SK |
164 | { considered_files : int ref |
165 | ; considered_bytes : int ref | |
166 | ; empty : int ref | |
167 | ; ignored_files : int ref | |
168 | ; ignored_bytes : int ref | |
169 | ; unique_size_files : int ref | |
170 | ; unique_size_bytes : int ref | |
171 | ; unique_sample_files : int ref | |
172 | ; unique_sample_bytes : int ref | |
173 | ; sampled_files : int ref | |
174 | ; sampled_bytes : int ref | |
175 | ; hashed_files : int ref | |
176 | ; hashed_bytes : int ref | |
177 | ; digests : int ref | |
a9a56d74 SK |
178 | } |
179 | ||
487389a4 SK |
180 | let add sum addend = |
181 | sum := !sum + addend | |
182 | ||
a9a56d74 SK |
183 | let make_input_stream input ignore count = |
184 | let input = | |
185 | match input with | |
186 | | Stdin -> | |
187 | File.lookup (In_channel.lines stdin) | |
188 | | Directories paths -> | |
189 | let paths = StrSet.elements (StrSet.of_list paths) in | |
190 | Stream.concat (List.map paths ~f:File.find) | |
191 | in | |
192 | Stream.filter input ~f:(fun {File.path; size} -> | |
487389a4 SK |
193 | incr count.considered_files; |
194 | add count.considered_bytes size; | |
a9a56d74 SK |
195 | let empty = size = 0 in |
196 | let ignored = | |
197 | match ignore with | |
198 | | Some regexp when (Str.string_match regexp path 0) -> | |
487389a4 SK |
199 | incr count.ignored_files; |
200 | add count.ignored_bytes size; | |
a9a56d74 SK |
201 | true |
202 | | Some _ | None -> | |
203 | false | |
204 | in | |
205 | if empty then incr count.empty; | |
a9a56d74 SK |
206 | (not empty) && (not ignored) |
207 | ) | |
e09dff7f SK |
208 | |
209 | let make_output_fun = function | |
210 | | Stdout -> | |
5c0100d2 SK |
211 | fun digest n_files files -> |
212 | printf "%s %d\n%!" (Digest.to_hex digest) n_files; | |
213 | List.iter (File.Set.elements files) ~f:(fun {File.path; _} -> | |
214 | printf " %S\n%!" path | |
215 | ) | |
e09dff7f | 216 | | Directory dir -> |
5c0100d2 | 217 | fun digest _ files -> |
e09dff7f SK |
218 | let digest = Digest.to_hex digest in |
219 | let dir = Filename.concat dir (String.sub digest 0 2) in | |
220 | Unix.mkdir dir ~perm:0o700; | |
221 | let oc = open_out (Filename.concat dir digest) in | |
5c0100d2 | 222 | List.iter (File.Set.elements files) ~f:(fun {File.path; _} -> |
e09dff7f SK |
223 | output_string oc (sprintf "%S\n%!" path) |
224 | ); | |
225 | close_out oc | |
226 | ||
487389a4 | 227 | let sample path ~len ~count = |
7a0486be SK |
228 | let buf = Bytes.make len ' ' in |
229 | let ic = open_in_bin path in | |
230 | let rec read pos len = | |
231 | assert (len >= 0); | |
232 | if len = 0 then | |
233 | () | |
234 | else begin | |
235 | let chunk_size = input ic buf pos len in | |
487389a4 | 236 | add count.sampled_bytes chunk_size; |
7a0486be SK |
237 | if chunk_size = 0 then (* EOF *) |
238 | () | |
239 | else | |
240 | read (pos + chunk_size) (len - chunk_size) | |
241 | end | |
242 | in | |
243 | read 0 len; | |
244 | close_in ic; | |
245 | Bytes.to_string buf | |
246 | ||
247 | let main {input; output; ignore; sample = sample_len} = | |
a9a56d74 SK |
248 | let t0 = Sys.time () in |
249 | let count = | |
487389a4 SK |
250 | { considered_files = ref 0 |
251 | ; considered_bytes = ref 0 | |
252 | ; empty = ref 0 | |
253 | ; ignored_files = ref 0 | |
254 | ; ignored_bytes = ref 0 | |
255 | ; unique_size_files = ref 0 | |
256 | ; unique_size_bytes = ref 0 | |
257 | ; sampled_files = ref 0 | |
258 | ; sampled_bytes = ref 0 | |
259 | ; hashed_files = ref 0 | |
260 | ; hashed_bytes = ref 0 | |
261 | ; unique_sample_files = ref 0 | |
262 | ; unique_sample_bytes = ref 0 | |
263 | ; digests = ref 0 | |
a9a56d74 SK |
264 | } |
265 | in | |
e09dff7f | 266 | let output = make_output_fun output in |
a9a56d74 | 267 | let input = make_input_stream input ignore count in |
5c0100d2 SK |
268 | let files_by_size = Hashtbl.create 1_000_000 in |
269 | let files_by_sample = Hashtbl.create 1_000_000 in | |
270 | let files_by_digest = Hashtbl.create 1_000_000 in | |
271 | let process tbl ~group ~file = | |
272 | let count, files = | |
273 | match Hashtbl.find_opt tbl group with | |
a9a56d74 | 274 | | None -> |
5c0100d2 SK |
275 | (0, File.Set.empty) |
276 | | Some (n, files) -> | |
277 | (n, files) | |
a9a56d74 | 278 | in |
5c0100d2 | 279 | Hashtbl.replace tbl group (count + 1, File.Set.add file files) |
34107832 | 280 | in |
8c54ccb8 SK |
281 | (* TODO: Make a nice(r) abstraction to re-assemble pieces in the pipeline: |
282 | * | |
283 | * from input to files_by_size | |
284 | * from files_by_size to files_by_sample | |
285 | * from files_by_sample to files_by_digest | |
286 | * from files_by_digest to output | |
287 | * | |
288 | * input |> files_by_size |> files_by_sample |> files_by_digest |> output | |
289 | *) | |
487389a4 | 290 | let t0_group_by_size = Sys.time () in |
5c0100d2 SK |
291 | Stream.iter input ~f:(fun ({File.size; _} as file) -> |
292 | process files_by_size ~group:size ~file | |
cce97c27 | 293 | ); |
487389a4 SK |
294 | let t1_group_by_size = Sys.time () in |
295 | let t0_group_by_sample = Sys.time () in | |
a9a56d74 | 296 | Hashtbl.iter |
5c0100d2 | 297 | (fun _ (n, files) -> |
a9a56d74 SK |
298 | (* Skip files with unique sizes *) |
299 | if n > 1 then | |
5c0100d2 SK |
300 | File.Set.iter |
301 | (fun ({File.path; _} as file) -> | |
487389a4 | 302 | incr count.sampled_files; |
5c0100d2 SK |
303 | process |
304 | files_by_sample | |
487389a4 | 305 | ~group:(sample path ~len:sample_len ~count) |
5c0100d2 | 306 | ~file |
a9a56d74 | 307 | ) |
5c0100d2 | 308 | files |
a9a56d74 | 309 | else |
487389a4 SK |
310 | File.Set.iter |
311 | (fun {File.size; _} -> | |
312 | incr count.unique_size_files; | |
313 | add count.unique_size_bytes size | |
314 | ) | |
315 | files | |
a9a56d74 | 316 | ) |
5c0100d2 | 317 | files_by_size; |
487389a4 SK |
318 | let t1_group_by_sample = Sys.time () in |
319 | let t0_group_by_digest = Sys.time () in | |
7a0486be | 320 | Hashtbl.iter |
5c0100d2 | 321 | (fun _ (n, files) -> |
7a0486be SK |
322 | (* Skip files with unique samples *) |
323 | if n > 1 then | |
5c0100d2 | 324 | File.Set.iter |
487389a4 SK |
325 | (fun ({File.path; size} as file) -> |
326 | incr count.hashed_files; | |
327 | add count.hashed_bytes size; | |
5c0100d2 | 328 | process files_by_digest ~group:(Digest.file path) ~file |
7a0486be | 329 | ) |
5c0100d2 | 330 | files |
7a0486be | 331 | else |
487389a4 SK |
332 | File.Set.iter |
333 | (fun {File.size; _} -> | |
334 | incr count.unique_sample_files; | |
335 | add count.unique_sample_bytes size; | |
336 | ) | |
337 | files | |
7a0486be | 338 | ) |
5c0100d2 | 339 | files_by_sample; |
487389a4 | 340 | let t1_group_by_digest = Sys.time () in |
5c0100d2 SK |
341 | Hashtbl.iter |
342 | (fun d (n, files) -> | |
487389a4 | 343 | incr count.digests; |
5c0100d2 SK |
344 | if n > 1 then |
345 | output d n files | |
346 | ) | |
347 | files_by_digest; | |
f16e6ff1 | 348 | let t1 = Sys.time () in |
487389a4 SK |
349 | let b_to_mb b = (float_of_int b) /. 1024. /. 1024. in |
350 | let b_to_gb b = (b_to_mb b) /. 1024. in | |
351 | eprintf "Time : %8.2f seconds\n%!" (t1 -. t0); | |
352 | eprintf "Considered : %8d files %6.2f Gb\n%!" | |
353 | !(count.considered_files) | |
354 | (b_to_gb !(count.considered_bytes)); | |
355 | eprintf "Sampled : %8d files %6.2f Gb\n%!" | |
356 | !(count.sampled_files) | |
357 | (b_to_gb !(count.sampled_bytes)); | |
358 | eprintf "Hashed : %8d files %6.2f Gb %6.2f seconds\n%!" | |
359 | !(count.hashed_files) | |
360 | (b_to_gb !(count.hashed_bytes)) | |
361 | (t1_group_by_digest -. t0_group_by_digest); | |
362 | eprintf "Digests : %8d\n%!" | |
363 | !(count.digests); | |
364 | eprintf "Duplicates (Hashed - Digests): %8d\n%!" | |
365 | (!(count.hashed_files) - !(count.digests)); | |
366 | eprintf "Skipped due to 0 size : %8d files\n%!" !(count.empty); | |
367 | eprintf "Skipped due to unique size : %8d files %6.2f Gb %6.2f seconds\n%!" | |
368 | !(count.unique_size_files) | |
369 | (b_to_gb !(count.unique_size_bytes)) | |
370 | (t1_group_by_size -. t0_group_by_size); | |
371 | eprintf "Skipped due to unique sample : %8d files %6.2f Gb %6.2f seconds\n%!" | |
372 | !(count.unique_sample_files) | |
373 | (b_to_gb !(count.unique_sample_bytes)) | |
374 | (t1_group_by_sample -. t0_group_by_sample); | |
375 | eprintf "Ignored due to regex match : %8d files %6.2f Gb\n%!" | |
376 | !(count.ignored_files) | |
377 | (b_to_gb !(count.ignored_bytes)) | |
cce97c27 | 378 | |
1253df34 SK |
379 | let get_opt () : opt = |
380 | let assert_ test x msg = | |
381 | if not (test x) then begin | |
382 | eprintf "%s\n%!" msg; | |
e09dff7f SK |
383 | exit 1 |
384 | end | |
385 | in | |
1253df34 SK |
386 | let assert_file_exists path = |
387 | assert_ Sys.file_exists path (sprintf "File does not exist: %S" path) | |
388 | in | |
e09dff7f | 389 | let assert_file_is_dir path = |
1253df34 | 390 | assert_ Sys.is_directory path (sprintf "File is not a directory: %S" path) |
e09dff7f | 391 | in |
1253df34 SK |
392 | let input = ref Stdin in |
393 | let output = ref Stdout in | |
394 | let ignore = ref None in | |
7a0486be | 395 | let sample = ref 256 in |
e09dff7f SK |
396 | let spec = |
397 | [ ( "-out" | |
398 | , Arg.String (fun path -> | |
399 | assert_file_exists path; | |
400 | assert_file_is_dir path; | |
401 | output := Directory path | |
8673c3a5 | 402 | ) |
e09dff7f SK |
403 | , " Output to this directory instead of stdout." |
404 | ) | |
34107832 SK |
405 | ; ( "-ignore" |
406 | , Arg.String (fun regexp -> ignore := Some (Str.regexp regexp)) | |
407 | , " Ignore file paths which match this regexp pattern (see Str module)." | |
408 | ) | |
7a0486be SK |
409 | ; ( "-sample" |
410 | , Arg.Set_int sample | |
411 | , (sprintf " Byte size of file samples to use. Default: %d" !sample) | |
412 | ) | |
e09dff7f SK |
413 | ] |
414 | in | |
415 | Arg.parse | |
416 | (Arg.align spec) | |
417 | (fun path -> | |
418 | assert_file_exists path; | |
419 | assert_file_is_dir path; | |
420 | match !input with | |
cfcdf90a SK |
421 | | Stdin -> |
422 | input := Directories [path] | |
423 | | Directories paths -> | |
424 | input := Directories (path :: paths) | |
61a05dbb SK |
425 | ) |
426 | ""; | |
7a0486be SK |
427 | assert_ |
428 | (fun x -> x > 0) | |
429 | !sample | |
430 | (sprintf "Sample size cannot be negative: %d" !sample); | |
1253df34 SK |
431 | { input = !input |
432 | ; output = !output | |
433 | ; ignore = !ignore | |
7a0486be | 434 | ; sample = !sample |
1253df34 SK |
435 | } |
436 | ||
437 | let () = | |
438 | main (get_opt ()) |