summaryrefslogtreecommitdiff
path: root/src/compiler.sml
blob: fc4067a4ce58aa12faf1594efa8ac1011cd59b8b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
(* Copyright (c) 2008-2012, 2014, Adam Chlipala
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - The names of contributors may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *)

structure Compiler :> COMPILER = struct

structure UrwebLrVals = UrwebLrValsFn(structure Token = LrParser.Token)
structure Lex = UrwebLexFn(structure Tokens = UrwebLrVals.Tokens)
structure UrwebP = Join(structure ParserData = UrwebLrVals.ParserData
                         structure Lex = Lex
                         structure LrParser = LrParser)

type job = {
     prefix : string,
     database : string option,
     sources : string list,
     exe : string,
     sql : string option,
     debug : bool,
     profile : bool,
     timeout : int,
     ffi : string list,
     link : string list,
     linker : string option,
     headers : string list,
     scripts : string list,
     clientToServer : Settings.ffi list,
     effectful : Settings.ffi list,
     benignEffectful : Settings.ffi list,
     clientOnly : Settings.ffi list,
     serverOnly : Settings.ffi list,
     jsFuncs : (Settings.ffi * string) list,
     rewrites : Settings.rewrite list,
     filterUrl : Settings.rule list,
     filterMime : Settings.rule list,
     filterRequest : Settings.rule list,
     filterResponse : Settings.rule list,
     filterEnv : Settings.rule list,
     protocol : string option,
     dbms : string option,
     sigFile : string option,
     safeGets : string list,
     onError : (string * string list * string) option,
     minHeap : int
}

type ('src, 'dst) phase = {
     func : 'src -> 'dst,
     print : 'dst -> Print.PD.pp_desc
}

type pmap = (string * Time.time) list

type ('src, 'dst) transform = {
     func : 'src -> 'dst option,
     print : 'dst -> Print.PD.pp_desc,
     time : 'src * pmap -> 'dst option * pmap
}

val debug = ref false
val dumpSource = ref false
val doIflow = ref false

val doDumpSource = ref (fn () => ())

val stop = ref (NONE : string option)
fun setStop s = stop := SOME s

fun transform (ph : ('src, 'dst) phase) name = {
    func = fn input => let
                  val () = if !debug then
                               print ("Starting " ^ name ^ "....\n")
                           else
                               ()
                  val v = #func ph input
              in
                  if !debug then
                      print ("Finished " ^ name ^ ".\n")
                  else
                      ();
                  if ErrorMsg.anyErrors () then
                      (!doDumpSource ();
                       doDumpSource := (fn () => ());
                       NONE)
                  else if !stop = SOME name then
                      (Print.eprint (#print ph v);
                       ErrorMsg.error ("Stopped compilation after phase " ^ name);
                       NONE)
                  else
                      (if !dumpSource then
                           doDumpSource := (fn () => Print.eprint (#print ph v))
                       else
                           ();
                       SOME v)
              end,
    print = #print ph,
    time = fn (input, pmap) => let
                  val () = if !debug then
                               print ("Starting " ^ name ^ "....\n")
                           else
                               ()
                  val befor = Time.now ()
                  val v = #func ph input
                  val elapsed = Time.- (Time.now (), befor)
              in
                  if !debug then
                      print ("Finished " ^ name ^ ".\n")
                  else
                      ();
                  (if ErrorMsg.anyErrors () then
                       NONE
                   else
                       SOME v,
                   (name, elapsed) :: pmap)
              end
}

fun check (tr : ('src, 'dst) transform) x = (ErrorMsg.resetErrors ();
                                             ignore (#func tr x))

fun run (tr : ('src, 'dst) transform) x = (ErrorMsg.resetErrors ();
                                           #func tr x)

fun runPrint (tr : ('src, 'dst) transform) input =
    (ErrorMsg.resetErrors ();
     case #func tr input of
         NONE => print "Failure\n"
       | SOME v =>
         (print "Success\n";
          Print.print (#print tr v);
          print "\n"))

fun runPrintToFile (tr : ('src, 'dst) transform) input fname =
    (ErrorMsg.resetErrors ();
     case #func tr input of
         NONE => print "Failure\n"
       | SOME v =>
         let
             val outf = TextIO.openOut fname
             val str = Print.openOut {dst = outf, wid = 80}
         in
             print "Success\n";
             Print.fprint str (#print tr v);
             Print.PD.PPS.closeStream str;
             TextIO.closeOut outf
         end)

fun time (tr : ('src, 'dst) transform) input =
    let
        val (_, pmap) = #time tr (input, [])
    in
        app (fn (name, time) =>
                print (name ^ ": " ^ LargeReal.toString (Time.toReal time) ^ "\n")) (rev pmap);
        print ("TOTAL: " ^ LargeReal.toString (Time.toReal (foldl Time.+ Time.zeroTime (map #2 pmap))) ^ "\n");
        print "\n"
    end

fun timePrint (tr : ('src, 'dst) transform) input =
    let
        val (ro, pmap) = #time tr (input, [])
    in
        app (fn (name, time) =>
                print (name ^ ": " ^ LargeReal.toString (Time.toReal time) ^ "\n")) (rev pmap);
        print ("TOTAL: " ^ LargeReal.toString (Time.toReal (foldl Time.+ Time.zeroTime (map #2 pmap))) ^ "\n");
        print "\n";
        case ro of
            NONE => print "Failure\n"
          | SOME v =>
            (print "Success\n";
             Print.print (#print tr v);
             print "\n")
    end

fun runPrintCoreFuncs (tr : ('src, Core.file) transform) input =
    (ErrorMsg.resetErrors ();
     case #func tr input of
         NONE => print "Failure\n"
       | SOME file =>
         (print "Success\n";
          app (fn (d, _) =>
                  case d of
                      Core.DVal (x, _, t, _, _) => Print.preface(x, CorePrint.p_con CoreEnv.empty t)
                    | Core.DValRec xts => app (fn (x, _, t, _, _) => Print.preface(x, CorePrint.p_con CoreEnv.empty t)) xts
                    | _ => ()) file))

val parseUrs =
    {func = fn filename => let
                   val fname = OS.FileSys.tmpName ()
                   val outf = TextIO.openOut fname
                   val () = TextIO.output (outf, "sig\n")
                   val inf = TextIO.openIn filename
                   fun loop () =
                       case TextIO.inputLine inf of
                           NONE => ()
                         | SOME line => (TextIO.output (outf, line);
                                         loop ())
                   val () = loop ()
                   val () = TextIO.closeIn inf
                   val () = TextIO.closeOut outf

                   val () = (ErrorMsg.resetErrors ();
                             ErrorMsg.resetPositioning filename;
                             Lex.UserDeclarations.initialize ())
	           val file = TextIO.openIn fname
	           fun get _ = TextIO.input file
	           fun parseerror (s, p1, p2) = ErrorMsg.errorAt' (p1, p2) s
	           val lexer = LrParser.Stream.streamify (Lex.makeLexer get)
	           val (absyn, _) = UrwebP.parse (30, lexer, parseerror, ())
               in
                   TextIO.closeIn file;
                   case absyn of
                       [(Source.DSgn ("?", (Source.SgnConst sgis, _)), _)] => sgis
                     | _ => (ErrorMsg.errorAt {file = filename,
                                               first = {line = 0,
                                                        char = 0},
                                               last = {line = 0,
                                                       char = 0}} "Not a signature";
                             [])
               end
               handle LrParser.ParseError => [],
     print = Print.p_list_sep Print.PD.newline SourcePrint.p_sgn_item}

(* The main parsing routine *)
val parseUr = {
    func = fn filename =>
              let
                  val () = (ErrorMsg.resetErrors ();
                            ErrorMsg.resetPositioning filename;
                            Lex.UserDeclarations.initialize ())
	          val file = TextIO.openIn filename
	          fun get _ = TextIO.input file
	          fun parseerror (s, p1, p2) = ErrorMsg.errorAt' (p1, p2) s
	          val lexer = LrParser.Stream.streamify (Lex.makeLexer get)
	          val (absyn, _) = UrwebP.parse (30, lexer, parseerror, ())
              in
                  TextIO.closeIn file;
                  case absyn of
                      [(Source.DSgn ("?", _), _)] =>
                      (ErrorMsg.errorAt {file = filename,
                                         first = {line = 0,
                                                  char = 0},
                                         last = {line = 0,
                                                 char = 0}} "File starts with 'sig'";
                       [])
                    | _ => absyn
              end
              handle LrParser.ParseError => [],
     print = SourcePrint.p_file}

fun p_job ({prefix, database, exe, sql, sources, debug, profile,
            timeout, ffi, link, headers, scripts,
            clientToServer, effectful, benignEffectful, clientOnly, serverOnly, jsFuncs, ...} : job) =
    let
        open Print.PD
        open Print

        fun p_ffi name = p_list_sep (box []) (fn (m, s) =>
                                                 box [string name, space, string m, string ".", string s, newline])
    in
        box [if debug then
                 box [string "DEBUG", newline]
             else
                 box [],
             if profile then
                 box [string "PROFILE", newline]
             else
                 box [],
             case database of
                 NONE => string "No database."
               | SOME db => string ("Database: " ^ db),
             newline,
             string "Exe: ",
             string exe,
             newline,
             case sql of
                 NONE => string "No SQL file."
               | SOME sql => string ("SQL fle: " ^ sql),
             newline,
             string "Timeout: ",
             string (Int.toString timeout),
             newline,
             p_list_sep (box []) (fn s => box [string "Ffi", space, string s, newline]) ffi,
             p_list_sep (box []) (fn s => box [string "Header", space, string s, newline]) headers,
             p_list_sep (box []) (fn s => box [string "Script", space, string s, newline]) scripts,
             p_list_sep (box []) (fn s => box [string "Link", space, string s, newline]) link,
             p_ffi "ClientToServer" clientToServer,
             p_ffi "Effectful" effectful,
             p_ffi "BenignEffectful" benignEffectful,
             p_ffi "ClientOnly" clientOnly,
             p_ffi "ServerOnly" serverOnly,
             p_list_sep (box []) (fn ((m, s), s') =>
                                     box [string "JsFunc", space, string m, string ".", string s,
                                          space, string "=", space, string s', newline]) jsFuncs,
             string "Sources:",
             p_list string sources,
             newline]
    end

fun trim s =
    let
        val (_, s) = Substring.splitl Char.isSpace s
        val (s, _) = Substring.splitr Char.isSpace s
    in
        s
    end

val trimS = Substring.string o trim o Substring.full

structure M = BinaryMapFn(struct
                          type ord_key = string
                          val compare = String.compare
                          end)

(* XXX ezyang: pathmap gets initialized /really early/, before
 * we do any options parsing.  So libUr will always point to the
 * default. We override it explicitly in enableBoot *)
val pathmap = ref (M.insert (M.empty, "", Settings.libUr ()))

fun addPath (k, v) = pathmap := M.insert (!pathmap, k, v)

(* XXX ezyang: this is not right; it probably doesn't work in
 * the case of separate build and src trees *)
fun enableBoot () =
 (Settings.configBin := OS.Path.joinDirFile {dir = Config.builddir, file = "bin"};
  Settings.configSrcLib := OS.Path.joinDirFile {dir = Config.builddir, file = "lib"};
  (* joinDirFile is annoying... (ArcError; it doesn't like
   * slashes in file) *)
  Settings.configLib := Config.builddir ^ "/src/c/.libs";
  Settings.configInclude := OS.Path.joinDirFile {dir = Config.builddir ^ "/include", file = "urweb"};
  Settings.configSitelisp := Config.builddir ^ "/src/elisp";
  addPath ("", Settings.libUr ()))

fun capitalize "" = ""
  | capitalize s = str (Char.toUpper (String.sub (s, 0))) ^ String.extract (s, 1, NONE)

fun institutionalizeJob (job : job) =
    (Settings.setDebug (#debug job);
     Settings.setUrlPrefix (#prefix job);
     Settings.setTimeout (#timeout job);
     Settings.setHeaders (#headers job);
     Settings.setScripts (#scripts job);
     Settings.setClientToServer (#clientToServer job);
     Settings.setEffectful (#effectful job);
     Settings.setBenignEffectful (#benignEffectful job);
     Settings.setClientOnly (#clientOnly job);
     Settings.setServerOnly (#serverOnly job);
     Settings.setJsFuncs (#jsFuncs job);
     Settings.setRewriteRules (#rewrites job);
     Settings.setUrlRules (#filterUrl job);
     Settings.setMimeRules (#filterMime job);
     Settings.setRequestHeaderRules (#filterRequest job);
     Settings.setResponseHeaderRules (#filterResponse job);
     Settings.setEnvVarRules (#filterEnv job);
     Option.app Settings.setProtocol (#protocol job);
     Option.app Settings.setDbms (#dbms job);
     Settings.setSafeGets (#safeGets job);
     Settings.setOnError (#onError job);
     Settings.setMinHeap (#minHeap job);
     Settings.setSigFile (#sigFile job))

datatype commentableLine =
         EndOfFile
       | OnlyComment
       | Content of string

fun inputCommentableLine inf =
    case TextIO.inputLine inf of
        NONE => EndOfFile
      | SOME s =>
        let
            val (befor, after) = Substring.splitl (fn ch => ch <> #"#") (Substring.full s)
        in
            if not (Substring.isEmpty after)
               andalso Substring.foldl (fn (ch, b) => b andalso Char.isSpace ch) true befor then
                OnlyComment
            else
                let
                    val s = #1 (Substring.splitr (not o Char.isSpace) befor)
                in
                    Content (Substring.string (if Substring.size s > 0 andalso Char.isSpace (Substring.sub (s, Substring.size s - 1)) then
                                                   if Substring.size s > 1 andalso Char.isSpace (Substring.sub (s, Substring.size s - 2)) then
                                                       Substring.trimr 2 s
                                                   else
                                                       Substring.trimr 1 s
                                               else
                                                   s))
                end
        end

val lastUrp = ref ""

fun parseUrp' accLibs fname =
    (if !lastUrp = fname then
         ()
     else
         ModDb.reset ();
     lastUrp := fname;
     if not (Posix.FileSys.access (fname ^ ".urp", []) orelse Posix.FileSys.access (fname ^ "/lib.urp", []))
        andalso Posix.FileSys.access (fname ^ ".ur", []) then
         let
             val job = {prefix = "/",
                        database = NONE,
                        sources = [fname],
                        exe = fname ^ ".exe",
                        sql = NONE,
                        debug = Settings.getDebug (),
                        profile = false,
                        timeout = 60,
                        ffi = [],
                        link = [],
                        linker = NONE,
                        headers = [],
                        scripts = [],
                        clientToServer = [],
                        effectful = [],
                        benignEffectful = [],
                        clientOnly = [],
                        serverOnly = [],
                        jsFuncs = [],
                        rewrites = [{pkind = Settings.Any,
                                     kind = Settings.Prefix,
                                     from = capitalize (OS.Path.file fname) ^ "/", to = "",
                                     hyphenate = false}],
                        filterUrl = [],
                        filterMime = [],
                        filterRequest = [],
                        filterResponse = [],
                        filterEnv = [],
                        protocol = NONE,
                        dbms = NONE,
                        sigFile = NONE,
                        safeGets = [],
                        onError = NONE,
                        minHeap = 0}
         in
             institutionalizeJob job;
             {Job = job, Libs = []}
         end
     else
         let
             val thisPath = OS.Path.dir fname

             val pathmap = ref (!pathmap)
             val bigLibs = ref []

             fun pu filename =
                 let
                     val filename = OS.Path.mkAbsolute {path = filename, relativeTo = OS.FileSys.getDir ()}

                     val dir = OS.Path.dir filename
                     fun opener () = TextIO.openIn (OS.Path.joinBaseExt {base = filename, ext = SOME "urp"})

                     val inf = opener ()

                     fun hasSpaceLine () =
                         case inputCommentableLine inf of
                             Content s => s = "debug" orelse s = "profile"
                                          orelse CharVector.exists (fn ch => ch = #" " orelse ch = #"\t") s orelse hasSpaceLine ()
                           | EndOfFile => false
                           | OnlyComment => hasSpaceLine ()

                     val hasBlankLine = hasSpaceLine ()

                     val inf = (TextIO.closeIn inf; opener ())

                     fun pathify fname =
                         if size fname > 0 andalso String.sub (fname, 0) = #"$" then
                             let
                                 val fname' = Substring.extract (fname, 1, NONE)
                                 val (befor, after) = Substring.splitl (fn ch => ch <> #"/") fname'
                             in
                                 case M.find (!pathmap, Substring.string befor) of
                                     NONE => fname
                                   | SOME rep => rep ^ Substring.string after
                             end
                         else
                             fname

                     fun relify fname =
                         let
                             val fname = pathify fname
                         in
                             OS.Path.concat (dir, fname)
                             handle OS.Path.Path => fname
                         end

                     fun libify path =
                         (if Posix.FileSys.access (path ^ ".urp", []) then
                              path
                          else
                              path ^ "/lib")
                         handle SysErr => path

                     fun libify' path =
                         (if Posix.FileSys.access (relify path ^ ".urp", []) then
                              path
                          else
                              path ^ "/lib")
                         handle SysErr => path

                     val absDir = OS.Path.mkAbsolute {path = dir, relativeTo = OS.FileSys.getDir ()}

                     fun relifyA fname =
                         OS.Path.mkAbsolute {path = pathify fname, relativeTo = absDir}

                     fun readSources acc =
                         case inputCommentableLine inf of
                             Content line =>
                             let
                                 val acc = if CharVector.all Char.isSpace line then
                                               acc
                                           else
                                               let
                                                   val fname = String.implode (List.filter (fn x => not (Char.isSpace x))
                                                                                           (String.explode line))
                                                   val fname = relifyA fname
                                               in
                                                   fname :: acc
                                               end
                             in
                                 readSources acc
                             end
                           | OnlyComment => readSources acc
                           | EndOfFile => rev acc

                     val prefix = ref (case Settings.getUrlPrefixFull () of "/" => NONE | s => SOME s)
                     val database = ref (Settings.getDbstring ())
                     val exe = ref (Settings.getExe ())
                     val sql = ref (Settings.getSql ())
                     val debug = ref (Settings.getDebug ())
                     val profile = ref false
                     val timeout = ref NONE
                     val ffi = ref []
                     val link = ref []
                     val linker = ref NONE
                     val headers = ref []
                     val scripts = ref []
                     val clientToServer = ref []
                     val effectful = ref []
                     val benignEffectful = ref []
                     val clientOnly = ref []
                     val serverOnly = ref []
                     val jsFuncs = ref []
                     val rewrites = ref []
                     val url = ref []
                     val mime = ref []
                     val request = ref []
                     val response = ref []
                     val env = ref []
                     val libs = ref []
                     val protocol = ref NONE
                     val dbms = ref NONE
                     val sigFile = ref (Settings.getSigFile ())
                     val safeGets = ref []
                     val onError = ref NONE
                     val minHeap = ref 0

                     fun finish sources =
                         let
                             val job = {
                                 prefix = Option.getOpt (!prefix, "/"),
                                 database = !database,
                                 exe = Option.getOpt (!exe, OS.Path.joinBaseExt {base = OS.Path.base filename,
                                                                                 ext = SOME "exe"}),
                                 sql = !sql,
                                 debug = !debug,
                                 profile = !profile,
                                 timeout = Option.getOpt (!timeout, 60),
                                 ffi = rev (!ffi),
                                 link = rev (!link),
                                 linker = !linker,
                                 headers = rev (!headers),
                                 scripts = rev (!scripts),
                                 clientToServer = rev (!clientToServer),
                                 effectful = rev (!effectful),
                                 benignEffectful = rev (!benignEffectful),
                                 clientOnly = rev (!clientOnly),
                                 serverOnly = rev (!serverOnly),
                                 jsFuncs = rev (!jsFuncs),
                                 rewrites = rev (!rewrites),
                                 filterUrl = rev (!url),
                                 filterMime = rev (!mime),
                                 filterRequest = rev (!request),
                                 filterResponse = rev (!response),
                                 filterEnv = rev (!env),
                                 sources = sources,
                                 protocol = !protocol,
                                 dbms = !dbms,
                                 sigFile = !sigFile,
                                 safeGets = rev (!safeGets),
                                 onError = !onError,
                                 minHeap = !minHeap
                             }

                             fun mergeO f (old, new) =
                                 case (old, new) of
                                     (NONE, _) => new
                                   | (_, NONE) => old
                                   | (SOME v1, SOME v2) => SOME (f (v1, v2))

                             fun same desc = mergeO (fn (x : string, y) =>
                                                        (if x = y then
                                                             ()
                                                         else
                                                             ErrorMsg.error ("Multiple "
                                                                             ^ desc ^ " values that don't agree");
                                                         x))

                             fun merge (old : job, new : job) = {
                                 prefix = case #prefix old of
                                              "/" => #prefix new
                                            | pold => case #prefix new of
                                                          "/" => pold
                                                        | pnew => (if pold = pnew then
                                                                       ()
                                                                   else
                                                                       ErrorMsg.error ("Multiple prefix values that don't agree: "
                                                                                       ^ pold ^ ", " ^ pnew);
                                                                   pold),
                                 database = mergeO (fn (old, _) => old) (#database old, #database new),
                                 exe = #exe old,
                                 sql = #sql old,
                                 debug = #debug old orelse #debug new,
                                 profile = #profile old orelse #profile new,
                                 timeout = #timeout old,
                                 ffi = #ffi old @ #ffi new,
                                 link = #link old @ #link new,
                                 linker = mergeO (fn (_, new) => new) (#linker old, #linker new),
                                 headers = #headers old @ #headers new,
                                 scripts = #scripts old @ #scripts new,
                                 clientToServer = #clientToServer old @ #clientToServer new,
                                 effectful = #effectful old @ #effectful new,
                                 benignEffectful = #benignEffectful old @ #benignEffectful new,
                                 clientOnly = #clientOnly old @ #clientOnly new,
                                 serverOnly = #serverOnly old @ #serverOnly new,
                                 jsFuncs = #jsFuncs old @ #jsFuncs new,
                                 rewrites = #rewrites old @ #rewrites new,
                                 filterUrl = #filterUrl old @ #filterUrl new,
                                 filterMime = #filterMime old @ #filterMime new,
                                 filterRequest = #filterRequest old @ #filterRequest new,
                                 filterResponse = #filterResponse old @ #filterResponse new,
                                 filterEnv = #filterEnv old @ #filterEnv new,
                                 sources = #sources new
                                           @ List.filter (fn s => List.all (fn s' => s' <> s) (#sources new))
                                                         (#sources old),
                                 protocol = mergeO #2 (#protocol old, #protocol new),
                                 dbms = mergeO #2 (#dbms old, #dbms new),
                                 sigFile = mergeO #2 (#sigFile old, #sigFile new),
                                 safeGets = #safeGets old @ #safeGets new,
                                 onError = mergeO #2 (#onError old, #onError new),
                                 minHeap = Int.max (#minHeap old, #minHeap new)
                             }
                         in
                             if accLibs then
                                 foldr (fn (job', job) => merge (job, job')) job (!libs)
                             else
                                 job
                         end

                     fun parsePkind s =
                         case s of
                             "all" => Settings.Any
                           | "url" => Settings.Url
                           | "table" => Settings.Table
                           | "sequence" => Settings.Sequence
                           | "view" => Settings.View
                           | "relation" => Settings.Relation
                           | "cookie" => Settings.Cookie
                           | "style" => Settings.Style
                           | _ => (ErrorMsg.error "Bad path kind spec";
                                   Settings.Any)

                     fun parseFrom s =
                         if size s > 1 andalso String.sub (s, size s - 2) = #"/" andalso String.sub (s, size s - 1) = #"*" then
                             (Settings.Prefix, String.substring (s, 0, size s - 1))
                         else
                             (Settings.Exact, s)

                     fun parseFkind s =
                         case s of
                             "url" => url
                           | "mime" => mime
                           | "requestHeader" => request
                           | "responseHeader" => response
                           | "env" => env
                           | _ => (ErrorMsg.error "Bad filter kind";
                                   url)

                     fun parsePattern s =
                         if size s > 0 andalso String.sub (s, size s - 1) = #"*" then
                             (Settings.Prefix, String.substring (s, 0, size s - 1))
                         else
                             (Settings.Exact, s)

                     fun read () =
                         case inputCommentableLine inf of
                             EndOfFile => finish []
                           | OnlyComment => read ()
                           | Content "" => finish (readSources [])
                           | Content line =>
                             let
                                 val (cmd, arg) = Substring.splitl (fn x => not (Char.isSpace x)) (Substring.full line)
                                 val cmd = Substring.string (trim cmd)
                                 val arg = Substring.string (trim arg)

                                 fun ffiS () =
                                     case String.fields (fn ch => ch = #".") arg of
                                         [m, x] => (m, x)
                                       | _ => (ErrorMsg.error (cmd ^ " argument not of the form Module.func");
                                               ("", ""))

                                 fun ffiM () =
                                     case String.fields (fn ch => ch = #"=") arg of
                                         [f, s] =>
                                         let
                                             val f = trimS f
                                             val s = trimS s
                                         in
                                             case String.fields (fn ch => ch = #".") f of
                                                 [m, x] => ((m, x), s)
                                               | _ => (ErrorMsg.error (cmd ^ " argument not of the form Module.func=func'");
                                                       (("", ""), ""))
                                         end
                                       | _ => (ErrorMsg.error (cmd ^ " argument not of the form Module.func=func'");
                                               (("", ""), ""))
                             in
                                 case cmd of
                                     "prefix" => prefix := SOME arg
                                   | "database" =>
                                     (case !database of
                                          NONE => database := SOME arg
                                        | SOME _ => ())
                                   | "dbms" =>
                                     (case !dbms of
                                          NONE => dbms := SOME arg
                                        | SOME _ => ())
                                   | "sigfile" =>
                                     (case !sigFile of
                                          NONE => sigFile := SOME arg
                                        | SOME _ => ())
                                   | "exe" =>
                                     (case !exe of
                                          NONE => exe := SOME (relify arg)
                                        | SOME _ => ())
                                   | "sql" =>
                                     (case !sql of
                                          NONE => sql := SOME (relify arg)
                                        | SOME _ => ())
                                   | "debug" => debug := true
                                   | "profile" => profile := true
                                   | "timeout" =>
                                     (case !timeout of
                                          NONE => ()
                                        | SOME _ => ErrorMsg.error "Duplicate 'timeout' directive";
                                      timeout := SOME (valOf (Int.fromString arg)))
                                   | "ffi" => ffi := relify arg :: !ffi
                                   | "link" => let
                                         val arg = if size arg >= 1
                                                      andalso String.sub (arg, 0) = #"-" then
                                                       arg
                                                   else
                                                       relifyA arg
                                     in
                                         link := arg :: !link
                                     end
                                   | "linker" => linker := SOME arg
                                   | "include" => headers := relifyA arg :: !headers
                                   | "script" => scripts := arg :: !scripts
                                   | "clientToServer" => clientToServer := ffiS () :: !clientToServer
                                   | "safeGet" => safeGets := arg :: !safeGets
                                   | "effectful" => effectful := ffiS () :: !effectful
                                   | "benignEffectful" => benignEffectful := ffiS () :: !benignEffectful
                                   | "clientOnly" => clientOnly := ffiS () :: !clientOnly
                                   | "serverOnly" => serverOnly := ffiS () :: !serverOnly
                                   | "jsFunc" => jsFuncs := ffiM () :: !jsFuncs
                                   | "rewrite" =>
                                     let
                                         fun doit (pkind, from, to, hyph) =
                                             let
                                                 val pkind = parsePkind pkind
                                                 val (kind, from) = parseFrom from
                                             in
                                                 rewrites := {pkind = pkind, kind = kind, from = from, to = to, hyphenate = hyph} :: !rewrites
                                             end
                                     in
                                         case String.tokens Char.isSpace arg of
                                             [pkind, from, to, "[-]"] => doit (pkind, from, to, true)
                                           | [pkind, from, "[-]"] => doit (pkind, from, "", true)
                                           | [pkind, from, to] => doit (pkind, from, to, false)
                                           | [pkind, from] => doit (pkind, from, "", false)
                                           | _ => ErrorMsg.error "Bad 'rewrite' syntax"
                                     end
                                   | "allow" =>
                                     (case String.tokens Char.isSpace arg of
                                          [fkind, pattern] =>
                                          let
                                              val fkind = parseFkind fkind
                                              val (kind, pattern) = parsePattern pattern
                                          in
                                              fkind := {action = Settings.Allow, kind = kind, pattern = pattern} :: !fkind
                                          end
                                        | _ => ErrorMsg.error "Bad 'allow' syntax")
                                   | "deny" =>
                                     (case String.tokens Char.isSpace arg of
                                          [fkind, pattern] =>
                                          let
                                              val fkind = parseFkind fkind
                                              val (kind, pattern) = parsePattern pattern
                                          in
                                              fkind := {action = Settings.Deny, kind = kind, pattern = pattern} :: !fkind
                                          end
                                        | _ => ErrorMsg.error "Bad 'deny' syntax")
                                   | "library" => if accLibs then
                                                      libs := pu (libify (relify arg)) :: !libs
                                                  else
                                                      bigLibs := libify' arg :: !bigLibs
                                   | "path" =>
                                     (case String.fields (fn ch => ch = #"=") arg of
                                          [n, v] => ((pathmap := M.insert (!pathmap, n, OS.Path.mkAbsolute {path = v, relativeTo = dir}))
                                                     handle OS.Path.Path => ErrorMsg.error "Invalid 'path' directory argument")
                                        | _ => ErrorMsg.error "path argument not of the form name=value'")
                                   | "onError" =>
                                     (case String.fields (fn ch => ch = #".") arg of
                                          m1 :: (fs as _ :: _) =>
                                          onError := SOME (m1, List.take (fs, length fs - 1), List.last fs)
                                        | _ => ErrorMsg.error "invalid 'onError' argument")
                                   | "limit" =>
                                     (case String.fields Char.isSpace arg of
                                          [class, num] =>
                                          (case Int.fromString num of
                                               NONE => ErrorMsg.error ("invalid limit number '" ^ num ^ "'")
                                             | SOME n =>
                                               if n < 0 then
                                                   ErrorMsg.error ("invalid limit number '" ^ num ^ "'")
                                               else
                                                   Settings.addLimit (class, n))
                                        | _ => ErrorMsg.error "invalid 'limit' arguments")
                                   | "minHeap" =>
                                     (case Int.fromString arg of
                                          NONE => ErrorMsg.error ("invalid min heap '" ^ arg ^ "'")
                                        | SOME n => minHeap := n)
                                   | "coreInline" =>
                                     (case Int.fromString arg of
                                          NONE => ErrorMsg.error ("invalid core inline level '" ^ arg ^ "'")
                                        | SOME n => Settings.setCoreInline n)
                                   | "monoInline" =>
                                     (case Int.fromString arg of
                                          NONE => ErrorMsg.error ("invalid mono inline level '" ^ arg ^ "'")
                                        | SOME n => Settings.setMonoInline n)
                                   | "alwaysInline" => Settings.addAlwaysInline arg
                                   | "neverInline" => Settings.addNeverInline arg
                                   | "noXsrfProtection" => Settings.addNoXsrfProtection arg
                                   | "timeFormat" => Settings.setTimeFormat arg
                                   | "noMangleSql" => Settings.setMangleSql false
                                   | "html5" => Settings.setIsHtml5 true
                                   | "lessSafeFfi" => Settings.setLessSafeFfi true

                                   | "file" =>
                                     (case String.fields Char.isSpace arg of
                                          [uri, fname] => (Settings.setFilePath thisPath;
                                                           Settings.addFile {Uri = uri,
                                                                             LoadFromFilename = fname})
                                        | _ => ErrorMsg.error "Bad 'file' arguments")

                                   | _ => ErrorMsg.error ("Unrecognized command '" ^ cmd ^ "'");
                                 read ()
                             end

                     val job = if hasBlankLine then
                                   read ()
                               else
                                   finish (readSources [])
                 in
                     TextIO.closeIn inf;
                     institutionalizeJob job;
                     job
                 end
         in
             {Job = pu fname, Libs = !bigLibs}
         end)

fun p_job' {Job = j, Libs = _ : string list} = p_job j

val parseUrp = {
    func = #Job o parseUrp' true,
    print = p_job
}

val parseUrp' = {
    func = parseUrp' false,
    print = p_job'
}

val toParseJob = transform parseUrp "parseJob"
val toParseJob' = transform parseUrp' "parseJob'"

fun op o (tr2 : ('b, 'c) transform, tr1 : ('a, 'b) transform) = {
    func = fn input => case #func tr1 input of
                           NONE => NONE
                         | SOME v => #func tr2 v,
    print = #print tr2,
    time = fn (input, pmap) => let
                  val (ro, pmap) = #time tr1 (input, pmap)
              in
                  case ro of
                      NONE => (NONE, pmap)
                    | SOME v => #time tr2 (v, pmap)
              end
}

structure SM = BinaryMapFn(struct
                           type ord_key = string
                           val compare = String.compare
                           end)

val moduleRoots = ref ([] : (string * string) list)
fun addModuleRoot (k, v) = moduleRoots :=
                           (OS.Path.mkAbsolute {path = k,
                                                relativeTo = OS.FileSys.getDir ()},
                            v) :: !moduleRoots

structure SK = struct
type ord_key = string
val compare = String.compare
end

structure SS = BinarySetFn(SK)
structure SM = BinaryMapFn(SK)

exception MissingFile of string

val parse = {
    func = fn {database, sources = fnames, ffi, onError, ...} : job =>
              let
                  val mrs = !moduleRoots

                  val anyErrors = ref false
                  fun checkErrors () = anyErrors := (!anyErrors orelse ErrorMsg.anyErrors ())
                  fun nameOf fname =
                      let
                          val fname = OS.Path.file fname
                          val fst = if size fname = 0 then #"!" else String.sub (fname, 0)
                      in
                          if not (Char.isAlpha fst) then
                              ErrorMsg.error ("Filename doesn't start with letter: " ^ fname)
                          else if CharVector.exists (fn ch => not (Char.isAlphaNum ch) andalso ch <> #"_") fname then
                              ErrorMsg.error ("Filename contains a character that isn't alphanumeric or underscore: " ^ fname)
                          else
                              ();
                          capitalize fname
                      end

                  fun parseFfi fname =
                      let
                          val mname = nameOf fname
                          val urs = OS.Path.joinBaseExt {base = fname, ext = SOME "urs"}

                          val loc = {file = urs,
                                     first = ErrorMsg.dummyPos,
                                     last = ErrorMsg.dummyPos}

                          val sgn = (Source.SgnConst (#func parseUrs urs), loc)
                      in
                          checkErrors ();
                          (Source.DFfiStr (mname, sgn, if !Elaborate.incremental then SOME (OS.FileSys.modTime urs) else NONE), loc)
                      end

                  val defed = ref SS.empty
                  val fulls = ref SS.empty

                  fun parseOne fname =
                      let
                          val mname = nameOf fname
                          val ur = OS.Path.joinBaseExt {base = fname, ext = SOME "ur"}
                          val urs = OS.Path.joinBaseExt {base = fname, ext = SOME "urs"}

                          val () = if Posix.FileSys.access (ur, []) then
                                       ()
                                   else
                                       raise MissingFile ur

                          val sgnO =
                              if Posix.FileSys.access (urs, []) then
                                  SOME (Source.SgnConst (#func parseUrs urs),
                                        {file = urs,
                                         first = ErrorMsg.dummyPos,
                                         last = ErrorMsg.dummyPos})
                                  before checkErrors ()
                              else
                                  NONE

                          val loc = {file = ur,
                                     first = ErrorMsg.dummyPos,
                                     last = ErrorMsg.dummyPos}

                          val urt = OS.FileSys.modTime ur
                          val urst = (OS.FileSys.modTime urs) handle _ => urt

                          val ds = #func parseUr ur
                          val d = (Source.DStr (mname, sgnO, if !Elaborate.incremental then SOME (if Time.> (urt, urst) then urt else urst) else NONE,
                                                (Source.StrConst ds, loc), false), loc)

                          val fname = OS.Path.mkCanonical fname
                          val d = case List.find (fn (root, name) =>
                                                     String.isPrefix (root ^ "/") fname) mrs of
                                      NONE => d
                                    | SOME (root, name) =>
                                      let
                                          val fname = String.extract (fname, size root + 1, NONE)
                                          val pieces = name :: String.tokens (fn ch => ch = #"/") fname
                                          val pieces = List.filter (fn s => size s > 0
                                                                            andalso Char.isAlpha (String.sub (s, 0)))
                                                                   pieces
                                          val pieces = map capitalize pieces
                                          val full = String.concatWith "." pieces

                                          fun makeD first prefix pieces =
                                              case pieces of
                                                  [] => (ErrorMsg.error "Empty module path";
                                                         (Source.DStyle "Boo", loc))
                                                | [_] => d
                                                | piece :: pieces =>
                                                  let
                                                      val this = case prefix of
                                                                     "" => piece
                                                                   | _ => prefix ^ "." ^ piece
                                                      val old = SS.member (!defed, this)

                                                      fun notThere (ch, s) =
                                                          Substring.isEmpty (#2 (Substring.splitl
                                                                                     (fn ch' => ch' <> ch) s))

                                                      fun simOpen () =
                                                          SS.foldl (fn (full, ds) =>
                                                                       if String.isPrefix (this ^ ".") full
                                                                          andalso notThere (#".",
                                                                                            Substring.extract (full,
                                                                                                               size
                                                                                                                   this + 1,
                                                                                                               NONE)) then
                                                                           let
                                                                               val parts = String.tokens
                                                                                           (fn ch => ch = #".") full

                                                                               val part = List.last parts

                                                                               val imp = if length parts >= 2 then
                                                                                             (Source.StrProj
                                                                                                  ((Source.StrVar
                                                                                                        (List.nth (parts,
                                                                                                                   length
                                                                                                                       parts
                                                                                                                       - 2)),
                                                                                                    loc),
                                                                                                   part), loc)
                                                                                         else
                                                                                             (Source.StrVar part, loc)
                                                                           in
                                                                               (Source.DStr (part, NONE, NONE, imp, false),
                                                                                loc) :: ds
                                                                           end
                                                                       else
                                                                           ds) [] (!fulls)
                                                  in
                                                      defed := SS.add (!defed, this);
                                                      (Source.DStr (piece, NONE, NONE,
                                                                    (Source.StrConst (if old then
                                                                                          simOpen ()
                                                                                          @ [makeD false this pieces]
                                                                                      else
                                                                                          [makeD false this pieces]),
                                                                     loc), first andalso old),
                                                       loc)
                                                  end
                                      in
                                          if SS.member (!fulls, full) then
                                              ErrorMsg.error ("Rooted module " ^ full ^ " has multiple versions.")
                                          else
                                              ();

                                          makeD true "" pieces
                                          before ignore (foldl (fn (new, path) =>
                                                                   let
                                                                       val new' = case path of
                                                                                      "" => new
                                                                                    | _ => path ^ "." ^ new
                                                                   in
                                                                       fulls := SS.add (!fulls, new');
                                                                       new'
                                                                   end) "" pieces)
                                      end
                      in
                          checkErrors ();
                          d
                      end handle MissingFile fname => (ErrorMsg.error ("Missing source file: " ^ fname);
                                                       (Source.DSequence "", ErrorMsg.dummySpan))

                  val dsFfi = map parseFfi ffi
                  val ds = map parseOne fnames
                  val loc = ErrorMsg.dummySpan
              in
                  if !anyErrors then
                      ErrorMsg.error "Parse failure"
                  else
                      ();

                  let
                      val final = List.last fnames
                      val final = case List.find (fn (root, name) =>
                                                     String.isPrefix (root ^ "/") final) mrs of
                                      NONE => (Source.StrVar (nameOf final), loc)
                                    | SOME (root, name) =>
                                      let
                                          val m = (Source.StrVar name, loc)
                                          val final = String.extract (final, size root + 1, NONE)
                                          val fields = String.fields (fn ch => ch = #"/") final
                                          val fields = List.filter (fn s => size s = 0
                                                                            orelse not (Char.isDigit (String.sub (s, 0))))
                                                                   fields
                                      in
                                          foldl (fn (x, m) => (Source.StrProj (m, capitalize x), loc))
                                                m fields
                                      end

                      val ds = dsFfi @ ds
                               @ [(Source.DExport final, loc)]

                      val ds = case database of
                                   NONE => ds
                                 | SOME s => (Source.DDatabase s, loc) :: ds

                      val ds = case onError of
                                   NONE => ds
                                 | SOME v => ds @ [(Source.DOnError v, loc)]

                      fun dummy fname = {file = Settings.libFile fname,
                                         first = ErrorMsg.dummyPos,
                                         last = ErrorMsg.dummyPos}

                      val used = SM.insert (SM.empty, "Basis", dummy "basis.urs")
                      val used = SM.insert (used, "Top", dummy "top.urs")
                  in
                      ignore (List.foldl (fn (d, used) =>
                                             case #1 d of
                                                 Source.DStr (x, _, _, _, false) =>
                                                 (case SM.find (used, x) of
                                                      SOME loc =>
                                                      (ErrorMsg.error ("Duplicate top-level module name " ^ x);
                                                       Print.prefaces "Files" [("Previous", Print.PD.string (ErrorMsg.spanToString loc)),
                                                                               ("Current", Print.PD.string (ErrorMsg.spanToString (#2 d)))];
                                                       used)
                                                    | NONE =>
                                                      SM.insert (used, x, #2 d))
                                               | _ => used) used ds);
                      ds
                  end handle Empty => ds
              end,
    print = SourcePrint.p_file
}

val toParse = transform parse "parse" o toParseJob

val elaborate = {
    func = fn file => let
                  val basisF = Settings.libFile "basis.urs"
                  val topF = Settings.libFile "top.urs"
                  val topF' = Settings.libFile "top.ur"

                  val basis = #func parseUrs basisF
                  val topSgn = #func parseUrs topF
                  val topStr = #func parseUr topF'

                  val tm1 = OS.FileSys.modTime topF
                  val tm2 = OS.FileSys.modTime topF'
              in
                  Elaborate.elabFile basis (OS.FileSys.modTime basisF)
                                     topStr topSgn (if Time.< (tm1, tm2) then tm2 else tm1)
                                     ElabEnv.empty file
              end,
    print = ElabPrint.p_file ElabEnv.empty
}

val toElaborate = transform elaborate "elaborate" o toParse

val unnest = {
    func = Unnest.unnest,
    print = ElabPrint.p_file ElabEnv.empty
}

val toUnnest = transform unnest "unnest" o toElaborate

val termination = {
    func = (fn file => (Termination.check file; file)),
    print = ElabPrint.p_file ElabEnv.empty
}

val toTermination = transform termination "termination" o toUnnest

val explify = {
    func = Explify.explify,
    print = ExplPrint.p_file ExplEnv.empty
}

val toExplify = transform explify "explify" o toUnnest

val corify = {
    func = Corify.corify,
    print = CorePrint.p_file CoreEnv.empty
}

val toCorify = transform corify "corify" o toExplify

(*val reduce_local = {
    func = ReduceLocal.reduce,
    print = CorePrint.p_file CoreEnv.empty
}

val toReduce_local = transform reduce_local "reduce_local" o toCorify*)

val especialize = {
    func = ESpecialize.specialize,
    print = CorePrint.p_file CoreEnv.empty
}

val core_untangle = {
    func = CoreUntangle.untangle,
    print = CorePrint.p_file CoreEnv.empty
}

val toCore_untangle = transform core_untangle "core_untangle" o toCorify

val shake = {
    func = Shake.shake,
    print = CorePrint.p_file CoreEnv.empty
}

val toShake1 = transform shake "shake1" o toCore_untangle

val toEspecialize1' = transform especialize "especialize1'" o toShake1
val toShake1' = transform shake "shake1'" o toEspecialize1'

val rpcify = {
    func = Rpcify.frob,
    print = CorePrint.p_file CoreEnv.empty
}

val toRpcify = transform rpcify "rpcify" o toShake1'

val toCore_untangle2 = transform core_untangle "core_untangle2" o toRpcify
val toShake2 = transform shake "shake2" o toCore_untangle2

val toEspecialize1 = transform especialize "especialize1" o toShake2

val toCore_untangle3 = transform core_untangle "core_untangle3" o toEspecialize1
val toShake3 = transform shake "shake3" o toCore_untangle3

val tag = {
    func = Tag.tag,
    print = CorePrint.p_file CoreEnv.empty
}

val toTag = transform tag "tag" o toShake3

val reduce = {
    func = Reduce.reduce,
    print = CorePrint.p_file CoreEnv.empty
}

val toReduce = transform reduce "reduce" o toTag

val toShakey = transform shake "shakey" o toReduce

val unpoly = {
    func = Unpoly.unpoly,
    print = CorePrint.p_file CoreEnv.empty
}

val toUnpoly = transform unpoly "unpoly" o toShakey

val specialize = {
    func = Specialize.specialize,
    print = CorePrint.p_file CoreEnv.empty
}

val toSpecialize = transform specialize "specialize" o toUnpoly

val toShake4 = transform shake "shake4" o toSpecialize

val toEspecialize2 = transform especialize "especialize2" o toShake4
val toShake4' = transform shake "shake4'" o toEspecialize2
val toUnpoly2 = transform unpoly "unpoly2" o toShake4'
val toSpecialize2 = transform specialize "specialize2" o toUnpoly2
val toShake4'' = transform shake "shake4'" o toSpecialize2
val toEspecialize3 = transform especialize "especialize3" o toShake4''

val toReduce2 = transform reduce "reduce2" o toEspecialize3

val toShake5 = transform shake "shake5" o toReduce2

val marshalcheck = {
    func = (fn file => (MarshalCheck.check file; file)),
    print = CorePrint.p_file CoreEnv.empty
}

val toMarshalcheck = transform marshalcheck "marshalcheck" o toShake5

val effectize = {
    func = Effective.effectize,
    print = CorePrint.p_file CoreEnv.empty
}

val toEffectize = transform effectize "effectize" o toMarshalcheck

val css = {
    func = Css.summarize,
    print = fn _ => Print.box []
}

val toCss = transform css "css" o toShake5

val monoize = {
    func = Monoize.monoize CoreEnv.empty,
    print = MonoPrint.p_file MonoEnv.empty
}

val toMonoize = transform monoize "monoize" o toEffectize

val mono_opt = {
    func = MonoOpt.optimize,
    print = MonoPrint.p_file MonoEnv.empty
}

val toMono_opt1 = transform mono_opt "mono_opt1" o toMonoize

val untangle = {
    func = Untangle.untangle,
    print = MonoPrint.p_file MonoEnv.empty
}

val toUntangle = transform untangle "untangle" o toMono_opt1

val mono_reduce = {
    func = MonoReduce.reduce,
    print = MonoPrint.p_file MonoEnv.empty
}

val toMono_reduce = transform mono_reduce "mono_reduce" o toUntangle

val mono_shake = {
    func = MonoShake.shake,
    print = MonoPrint.p_file MonoEnv.empty
}

val toMono_shake = transform mono_shake "mono_shake1" o toMono_reduce

val toMono_opt2 = transform mono_opt "mono_opt2" o toMono_shake

val iflow = {
    func = (fn file => (if !doIflow then Iflow.check file else (); file)),
    print = MonoPrint.p_file MonoEnv.empty
}

val toIflow = transform iflow "iflow" o toMono_opt2

val namejs = {
    func = NameJS.rewrite,
    print = MonoPrint.p_file MonoEnv.empty
}

val toNamejs = transform namejs "namejs" o toIflow

val toNamejs_untangle = transform untangle "namejs_untangle" o toNamejs

val scriptcheck = {
    func = ScriptCheck.classify,
    print = MonoPrint.p_file MonoEnv.empty
}

val toScriptcheck = transform scriptcheck "scriptcheck" o toNamejs_untangle

val dbmodecheck = {
    func = DbModeCheck.classify,
    print = MonoPrint.p_file MonoEnv.empty
}

val toDbmodecheck = transform dbmodecheck "dbmodecheck" o toScriptcheck

val jscomp = {
    func = JsComp.process,
    print = MonoPrint.p_file MonoEnv.empty
}

val toJscomp = transform jscomp "jscomp" o toDbmodecheck

val toMono_opt3 = transform mono_opt "mono_opt3" o toJscomp

val fuse = {
    func = Fuse.fuse,
    print = MonoPrint.p_file MonoEnv.empty
}

val toFuse = transform fuse "fuse" o toMono_opt3

val toUntangle2 = transform untangle "untangle2" o toFuse

val toMono_reduce2 = transform mono_reduce "mono_reduce2" o toUntangle2
val toMono_shake2 = transform mono_shake "mono_shake2" o toMono_reduce2
val toMono_opt4 = transform mono_opt "mono_opt4" o toMono_shake2
val toMono_reduce3 = transform mono_reduce "mono_reduce3" o toMono_opt4
val toFuse2 = transform fuse "fuse2" o toMono_reduce3
val toUntangle3 = transform untangle "untangle3" o toFuse2
val toMono_shake3 = transform mono_shake "mono_shake3" o toUntangle3

val pathcheck = {
    func = (fn file => (PathCheck.check file; file)),
    print = MonoPrint.p_file MonoEnv.empty
}

val toPathcheck = transform pathcheck "pathcheck" o toMono_shake3

val sidecheck = {
    func = SideCheck.check,
    print = MonoPrint.p_file MonoEnv.empty
}

val toSidecheck = transform sidecheck "sidecheck" o toPathcheck

val sigcheck = {
    func = SigCheck.check,
    print = MonoPrint.p_file MonoEnv.empty
}

val toSigcheck = transform sigcheck "sigcheck" o toSidecheck

val sqlcache = {
    func = (fn file =>
               if Settings.getSqlcache ()
               then let val file = MonoInline.inlineFull file in Sqlcache.go file end
               else file),
    print = MonoPrint.p_file MonoEnv.empty
}

val toSqlcache = transform sqlcache "sqlcache" o toSigcheck

val cjrize = {
    func = Cjrize.cjrize,
    print = CjrPrint.p_file CjrEnv.empty
}

val toCjrize = transform cjrize "cjrize" o toSqlcache

val prepare = {
    func = Prepare.prepare,
    print = CjrPrint.p_file CjrEnv.empty
}

val toPrepare = transform prepare "prepare" o toCjrize

val checknest = {
    func = fn f => if #supportsNestedPrepared (Settings.currentDbms ()) then f else Checknest.annotate f,
    print = CjrPrint.p_file CjrEnv.empty
}

val toChecknest = transform checknest "checknest" o toPrepare

val sqlify = {
    func = Cjrize.cjrize,
    print = CjrPrint.p_sql CjrEnv.empty
}

val toSqlify = transform sqlify "sqlify" o toMono_opt2

fun escapeFilename s =
    "\""
    ^ String.translate (fn #"\"" => "\\\"" | #"\\" => "\\\\" | ch => str ch) s
    ^ "\""

val beforeC = ref (fn () => ())

structure StringSet = BinarySetFn(struct
                                  type ord_key = string
                                  val compare = String.compare
                                  end)

fun compileC {cname, oname, ename, libs, profile, debug, linker, link = link'} =
    let
        val proto = Settings.currentProtocol ()

        val lib = if Settings.getStaticLinking () then
                      " -static " ^ !Settings.configLib ^ "/" ^ #linkStatic proto ^ " " ^ !Settings.configLib ^ "/liburweb.a"
                  else
                      "-L" ^ !Settings.configLib ^ " " ^ #linkDynamic proto ^ " -lurweb"

        val opt = if debug then
                      ""
                  else
                      " -O3"

        val compile = (Settings.getCCompiler ()) ^ " " ^ Config.ccArgs ^ " " ^ Config.pthreadCflags ^ " -Wimplicit -Werror -Wno-unused-value"
                      ^ opt ^ " -I " ^ !Settings.configInclude
                      ^ " " ^ #compile proto
                      ^ " -c " ^ escapeFilename cname ^ " -o " ^ escapeFilename oname

        val linker = Option.getOpt (linker, (Settings.getCCompiler ()) ^ " -Werror" ^ opt ^ " " ^ Config.ccArgs ^ " " ^ Config.pthreadCflags ^ " " ^ Config.pthreadLibs)

        val ssl = if Settings.getStaticLinking () then
                      Config.openssl ^ " -ldl -lz"
                  else
                      Config.openssl

        val link = linker
                   ^ " " ^ escapeFilename oname ^ " " ^ lib ^ " -lm " ^ ssl ^ " " ^ libs ^ " -o " ^ escapeFilename ename

        val (compile, link) =
            if profile then
                (compile ^ " -pg", link ^ " -pg")
            else
                (compile, link)

        val (compile, link) =
            if debug then
                (compile ^ " -g", link ^ " -g")
            else
                (compile, link)

        val link = #1 (foldl
            (fn (s, (link, set)) =>
              if StringSet.member (set, s) then
                (link, set)
              else
                ((link ^ " " ^ s), StringSet.add (set, s)))
            (link, StringSet.empty)
            link')

        fun system s =
            (if debug then
                 print (s ^ "\n")
             else
                 ();
             OS.Process.isSuccess (OS.Process.system s))
    in
        !beforeC ();
        system compile andalso system link
    end

fun compile job =
    case run toChecknest job of
        NONE => false
      | SOME file =>
        let
            val job = valOf (run (transform parseUrp "parseUrp") job)

            val (cname, oname, cleanup) =
                if #debug job then
                    ("/tmp/webapp.c", "/tmp/webapp.o", fn () => ())
                else
                    let
                        val dir = OS.FileSys.tmpName ()
                        val () = if OS.FileSys.access (dir, []) then
                                     OS.FileSys.remove dir
                                 else
                                     ()
                        val cname = OS.Path.joinDirFile {dir = dir, file = "webapp.c"}
                        val oname = OS.Path.joinDirFile {dir = dir, file = "webapp.o"}
                    in
                        OS.FileSys.mkDir dir;
                        (cname, oname,
                      fn () => (if OS.Process.isSuccess (OS.Process.system ("rm -rf " ^ dir)) then
                                    ()
                                else
                                    raise Fail ("Unable to delete temporary directory " ^ dir)))
                    end
            val ename = #exe job
        in
            let
                val outf = TextIO.openOut cname
                val s = TextIOPP.openOut {dst = outf, wid = 80}

                val hasDb = List.exists (fn (Cjr.DDatabase _, _) => true | _ => false) (#1 file)
                val libs =
                    if hasDb then
                        #link (Settings.currentDbms ())
                    else
                        ""
            in
                Print.fprint s (CjrPrint.p_file CjrEnv.empty file);
		TextIO.output1 (outf, #"\n");
                TextIO.closeOut outf;

                if ErrorMsg.anyErrors () then
                    false
                else
                    (case #sql job of
                         NONE => ()
                       | SOME sql =>
                         let
                             val outf = TextIO.openOut sql
                             val s = TextIOPP.openOut {dst = outf, wid = 80}
                         in
                             Print.fprint s (CjrPrint.p_sql CjrEnv.empty file);
                             TextIO.closeOut outf
                         end;

                     compileC {cname = cname, oname = oname, ename = ename, libs = libs,
                               profile = #profile job, debug = #debug job, linker = #linker job, link = #link job}

                     before cleanup ())
            end
            handle ex => (((cleanup ()) handle _ => ()); raise ex)
        end

fun compiler job =
    if compile job then
        ()
    else
        OS.Process.exit OS.Process.failure

fun moduleOf fname =
    let
        val mrs = !moduleRoots
        val fname = OS.Path.mkCanonical fname
    in
        case List.find (fn (root, _) => String.isPrefix (root ^ "/") fname) mrs of
            NONE => capitalize (OS.Path.base (OS.Path.file fname))
          | SOME (root, name) =>
            let
                val fname = OS.Path.base fname
                val fname = String.extract (fname, size root + 1, NONE)
                val fs = String.fields (fn ch => ch = #"/") fname
                val fs = List.filter (CharVector.exists (fn ch => not (Char.isDigit ch))) fs
                val fs = map capitalize fs
            in
                String.concatWith "." (name :: fs)
            end
    end

end