Commit | Line | Data |
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cce97c27 SK |
1 | open Printf |
2 | ||
948ee900 SK |
3 | module Array = ArrayLabels |
4 | module List = ListLabels | |
8673c3a5 | 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 SK |
14 | |
15 | val concat : ('a t) list -> 'a t | |
cce97c27 SK |
16 | end = struct |
17 | module S = Stream | |
18 | ||
948ee900 | 19 | type 'a t = |
8673c3a5 | 20 | ('a S.t) list |
948ee900 | 21 | |
e13e9ef5 | 22 | let create f = |
8673c3a5 | 23 | [S.from (fun _ -> f ())] |
e13e9ef5 SK |
24 | |
25 | let iter t ~f = | |
8673c3a5 SK |
26 | List.iter t ~f:(S.iter f) |
27 | ||
28 | let concat ts = | |
29 | List.concat ts | |
e13e9ef5 SK |
30 | end |
31 | ||
32 | module In_channel : sig | |
33 | val lines : in_channel -> string Stream.t | |
34 | end = struct | |
35 | let lines ic = | |
36 | Stream.create (fun () -> | |
37 | match input_line ic with | |
38 | | exception End_of_file -> | |
39 | None | |
40 | | line -> | |
41 | Some line | |
42 | ) | |
43 | end | |
44 | ||
7b7a6b7f | 45 | module Directory_tree : sig |
e13e9ef5 SK |
46 | val find_files : string -> string Stream.t |
47 | end = struct | |
48 | let find_files root = | |
948ee900 SK |
49 | let dirs = Queue.create () in |
50 | let files = Queue.create () in | |
948ee900 SK |
51 | let explore parent = |
52 | Array.iter (Sys.readdir parent) ~f:(fun child -> | |
53 | let path = Filename.concat parent child in | |
54 | let {Unix.st_kind = file_kind; _} = Unix.lstat path in | |
55 | match file_kind with | |
56 | | Unix.S_REG -> | |
57 | Queue.add path files | |
58 | | Unix.S_DIR -> | |
59 | Queue.add path dirs | |
60 | | Unix.S_CHR | |
61 | | Unix.S_BLK | |
62 | | Unix.S_LNK | |
63 | | Unix.S_FIFO | |
64 | | Unix.S_SOCK -> | |
65 | () | |
66 | ) | |
67 | in | |
1f130f74 | 68 | explore root; |
c66266c6 SK |
69 | let rec next () = |
70 | match Queue.is_empty files, Queue.is_empty dirs with | |
71 | | false, _ -> Some (Queue.take files) | |
72 | | true , true -> None | |
73 | | true , false -> | |
74 | explore (Queue.take dirs); | |
75 | next () | |
76 | in | |
77 | Stream.create next | |
cce97c27 SK |
78 | end |
79 | ||
948ee900 | 80 | type input = |
8673c3a5 | 81 | | Root_paths of string list |
948ee900 SK |
82 | | Paths_on_stdin |
83 | ||
e09dff7f SK |
84 | type output = |
85 | | Stdout | |
86 | | Directory of string | |
87 | ||
88 | let make_input_stream = function | |
89 | | Paths_on_stdin -> | |
90 | In_channel.lines stdin | |
91 | | Root_paths paths -> | |
92 | let paths = StrSet.elements (StrSet.of_list paths) in | |
93 | Stream.concat (List.map paths ~f:Directory_tree.find_files) | |
94 | ||
95 | let make_output_fun = function | |
96 | | Stdout -> | |
97 | fun digest n_paths paths -> | |
98 | printf "%s %d\n%!" (Digest.to_hex digest) n_paths; | |
99 | List.iter (StrSet.elements paths) ~f:(printf " %S\n%!") | |
100 | | Directory dir -> | |
101 | fun digest _ paths -> | |
102 | let digest = Digest.to_hex digest in | |
103 | let dir = Filename.concat dir (String.sub digest 0 2) in | |
104 | Unix.mkdir dir ~perm:0o700; | |
105 | let oc = open_out (Filename.concat dir digest) in | |
106 | List.iter (StrSet.elements paths) ~f:(fun path -> | |
107 | output_string oc (sprintf "%S\n%!" path) | |
108 | ); | |
109 | close_out oc | |
110 | ||
111 | let main input output = | |
112 | let output = make_output_fun output in | |
113 | let input = make_input_stream input in | |
cce97c27 | 114 | let paths_by_digest = Hashtbl.create 1_000_000 in |
f16e6ff1 SK |
115 | let path_count = ref 0 in |
116 | let t0 = Sys.time () in | |
e09dff7f | 117 | Stream.iter input ~f:(fun path -> |
f16e6ff1 | 118 | incr path_count; |
cce97c27 SK |
119 | try |
120 | let digest = Digest.file path in | |
e09dff7f | 121 | let count, paths = |
cce97c27 SK |
122 | match Hashtbl.find_opt paths_by_digest digest with |
123 | | None -> | |
e09dff7f SK |
124 | (0, StrSet.empty) |
125 | | Some (n, paths) -> | |
126 | (n, paths) | |
cce97c27 | 127 | in |
e09dff7f | 128 | Hashtbl.replace paths_by_digest digest (count + 1, StrSet.add path paths) |
cce97c27 SK |
129 | with Sys_error e -> |
130 | eprintf "WARNING: Failed to process %S: %S\n%!" path e | |
131 | ); | |
e09dff7f | 132 | Hashtbl.iter (fun d (n, ps) -> if n > 1 then output d n ps) paths_by_digest; |
f16e6ff1 SK |
133 | let t1 = Sys.time () in |
134 | eprintf "Processed %d files in %f seconds.\n%!" !path_count (t1 -. t0) | |
cce97c27 SK |
135 | |
136 | let () = | |
e09dff7f SK |
137 | let input = ref Paths_on_stdin in |
138 | let output = ref Stdout in | |
139 | let assert_file_exists path = | |
140 | if Sys.file_exists path then | |
141 | () | |
142 | else begin | |
143 | eprintf "File does not exist: %S\n%!" path; | |
144 | exit 1 | |
145 | end | |
146 | in | |
147 | let assert_file_is_dir path = | |
148 | if Sys.is_directory path then | |
149 | () | |
150 | else begin | |
151 | eprintf "File is not a directory: %S\n%!" path; | |
152 | exit 1 | |
153 | end | |
154 | in | |
155 | let spec = | |
156 | [ ( "-out" | |
157 | , Arg.String (fun path -> | |
158 | assert_file_exists path; | |
159 | assert_file_is_dir path; | |
160 | output := Directory path | |
8673c3a5 | 161 | ) |
e09dff7f SK |
162 | , " Output to this directory instead of stdout." |
163 | ) | |
164 | ] | |
165 | in | |
166 | Arg.parse | |
167 | (Arg.align spec) | |
168 | (fun path -> | |
169 | assert_file_exists path; | |
170 | assert_file_is_dir path; | |
171 | match !input with | |
172 | | Paths_on_stdin -> | |
173 | input := Root_paths [path] | |
174 | | Root_paths paths -> | |
175 | input := Root_paths (path :: paths) | |
61a05dbb SK |
176 | ) |
177 | ""; | |
e09dff7f | 178 | main !input !output |