summaryrefslogtreecommitdiffstats
path: root/Source/cmGlobalNinjaGenerator.cxx
blob: ba1ace6f2fe508f3dfbc4f454122788ff09c73c2 (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
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
   file Copyright.txt or https://cmake.org/licensing for details.  */
#include "cmGlobalNinjaGenerator.h"

#include "cm_jsoncpp_reader.h"
#include "cm_jsoncpp_value.h"
#include "cm_jsoncpp_writer.h"
#include "cmsys/FStream.hxx"
#include <algorithm>
#include <ctype.h>
#include <iterator>
#include <memory> // IWYU pragma: keep
#include <sstream>
#include <stdio.h>

#include "cmAlgorithms.h"
#include "cmDocumentationEntry.h"
#include "cmFortranParser.h"
#include "cmGeneratedFileStream.h"
#include "cmGeneratorExpressionEvaluationFile.h"
#include "cmGeneratorTarget.h"
#include "cmListFileCache.h"
#include "cmLocalGenerator.h"
#include "cmLocalNinjaGenerator.h"
#include "cmMakefile.h"
#include "cmMessageType.h"
#include "cmNinjaLinkLineComputer.h"
#include "cmOutputConverter.h"
#include "cmState.h"
#include "cmStateDirectory.h"
#include "cmStateSnapshot.h"
#include "cmStateTypes.h"
#include "cmSystemTools.h"
#include "cmTarget.h"
#include "cmTargetDepend.h"
#include "cmVersion.h"
#include "cmake.h"

class cmLinkLineComputer;

const char* cmGlobalNinjaGenerator::NINJA_BUILD_FILE = "build.ninja";
const char* cmGlobalNinjaGenerator::NINJA_RULES_FILE = "rules.ninja";
const char* cmGlobalNinjaGenerator::INDENT = "  ";
#ifdef _WIN32
std::string const cmGlobalNinjaGenerator::SHELL_NOOP = "cd .";
#else
std::string const cmGlobalNinjaGenerator::SHELL_NOOP = ":";
#endif

void cmGlobalNinjaGenerator::Indent(std::ostream& os, int count)
{
  for (int i = 0; i < count; ++i) {
    os << cmGlobalNinjaGenerator::INDENT;
  }
}

void cmGlobalNinjaGenerator::WriteDivider(std::ostream& os)
{
  os << "# ======================================"
        "=======================================\n";
}

void cmGlobalNinjaGenerator::WriteComment(std::ostream& os,
                                          const std::string& comment)
{
  if (comment.empty()) {
    return;
  }

  std::string::size_type lpos = 0;
  std::string::size_type rpos;
  os << "\n#############################################\n";
  while ((rpos = comment.find('\n', lpos)) != std::string::npos) {
    os << "# " << comment.substr(lpos, rpos - lpos) << "\n";
    lpos = rpos + 1;
  }
  os << "# " << comment.substr(lpos) << "\n\n";
}

cmLinkLineComputer* cmGlobalNinjaGenerator::CreateLinkLineComputer(
  cmOutputConverter* outputConverter,
  cmStateDirectory const& /* stateDir */) const
{
  return new cmNinjaLinkLineComputer(
    outputConverter,
    this->LocalGenerators[0]->GetStateSnapshot().GetDirectory(), this);
}

std::string cmGlobalNinjaGenerator::EncodeRuleName(std::string const& name)
{
  // Ninja rule names must match "[a-zA-Z0-9_.-]+".  Use ".xx" to encode
  // "." and all invalid characters as hexadecimal.
  std::string encoded;
  for (char i : name) {
    if (isalnum(i) || i == '_' || i == '-') {
      encoded += i;
    } else {
      char buf[16];
      sprintf(buf, ".%02x", static_cast<unsigned int>(i));
      encoded += buf;
    }
  }
  return encoded;
}

std::string cmGlobalNinjaGenerator::EncodeLiteral(const std::string& lit)
{
  std::string result = lit;
  cmSystemTools::ReplaceString(result, "$", "$$");
  cmSystemTools::ReplaceString(result, "\n", "$\n");
  return result;
}

std::string cmGlobalNinjaGenerator::EncodePath(const std::string& path)
{
  std::string result = path;
#ifdef _WIN32
  if (this->IsGCCOnWindows())
    std::replace(result.begin(), result.end(), '\\', '/');
  else
    std::replace(result.begin(), result.end(), '/', '\\');
#endif
  result = EncodeLiteral(result);
  cmSystemTools::ReplaceString(result, " ", "$ ");
  cmSystemTools::ReplaceString(result, ":", "$:");
  return result;
}

void cmGlobalNinjaGenerator::WriteBuild(
  std::ostream& os, const std::string& comment, const std::string& rule,
  const cmNinjaDeps& outputs, const cmNinjaDeps& implicitOuts,
  const cmNinjaDeps& explicitDeps, const cmNinjaDeps& implicitDeps,
  const cmNinjaDeps& orderOnlyDeps, const cmNinjaVars& variables,
  const std::string& rspfile, int cmdLineLimit, bool* usedResponseFile)
{
  // Make sure there is a rule.
  if (rule.empty()) {
    cmSystemTools::Error("No rule for WriteBuildStatement! called "
                         "with comment: ",
                         comment.c_str());
    return;
  }

  // Make sure there is at least one output file.
  if (outputs.empty()) {
    cmSystemTools::Error("No output files for WriteBuildStatement! called "
                         "with comment: ",
                         comment.c_str());
    return;
  }

  cmGlobalNinjaGenerator::WriteComment(os, comment);

  std::string arguments;

  // TODO: Better formatting for when there are multiple input/output files.

  // Write explicit dependencies.
  for (std::string const& explicitDep : explicitDeps) {
    arguments += " " + EncodePath(explicitDep);
  }

  // Write implicit dependencies.
  if (!implicitDeps.empty()) {
    arguments += " |";
    for (std::string const& implicitDep : implicitDeps) {
      arguments += " " + EncodePath(implicitDep);
    }
  }

  // Write order-only dependencies.
  if (!orderOnlyDeps.empty()) {
    arguments += " ||";
    for (std::string const& orderOnlyDep : orderOnlyDeps) {
      arguments += " " + EncodePath(orderOnlyDep);
    }
  }

  arguments += "\n";

  std::string build;

  // Write outputs files.
  build += "build";
  for (std::string const& output : outputs) {
    build += " " + EncodePath(output);
    if (this->ComputingUnknownDependencies) {
      this->CombinedBuildOutputs.insert(output);
    }
  }
  if (!implicitOuts.empty()) {
    build += " |";
    for (std::string const& implicitOut : implicitOuts) {
      build += " " + EncodePath(implicitOut);
    }
  }
  build += ":";

  // Write the rule.
  build += " " + rule;

  // Write the variables bound to this build statement.
  std::ostringstream variable_assignments;
  for (auto const& variable : variables) {
    cmGlobalNinjaGenerator::WriteVariable(variable_assignments, variable.first,
                                          variable.second, "", 1);
  }

  // check if a response file rule should be used
  std::string buildstr = build;
  std::string assignments = variable_assignments.str();
  bool useResponseFile = false;
  if (cmdLineLimit < 0 ||
      (cmdLineLimit > 0 &&
       (arguments.size() + buildstr.size() + assignments.size() + 1000) >
         static_cast<size_t>(cmdLineLimit))) {
    variable_assignments.str(std::string());
    cmGlobalNinjaGenerator::WriteVariable(variable_assignments, "RSP_FILE",
                                          rspfile, "", 1);
    assignments += variable_assignments.str();
    useResponseFile = true;
  }
  if (usedResponseFile) {
    *usedResponseFile = useResponseFile;
  }

  os << buildstr << arguments << assignments;
}

void cmGlobalNinjaGenerator::WritePhonyBuild(
  std::ostream& os, const std::string& comment, const cmNinjaDeps& outputs,
  const cmNinjaDeps& explicitDeps, const cmNinjaDeps& implicitDeps,
  const cmNinjaDeps& orderOnlyDeps, const cmNinjaVars& variables)
{
  this->WriteBuild(os, comment, "phony", outputs,
                   /*implicitOuts=*/cmNinjaDeps(), explicitDeps, implicitDeps,
                   orderOnlyDeps, variables);
}

void cmGlobalNinjaGenerator::AddCustomCommandRule()
{
  this->AddRule("CUSTOM_COMMAND", "$COMMAND", "$DESC",
                "Rule for running custom commands.",
                /*depfile*/ "",
                /*deptype*/ "",
                /*rspfile*/ "",
                /*rspcontent*/ "",
                /*restat*/ "", // bound on each build statement as needed
                /*generator*/ false);
}

void cmGlobalNinjaGenerator::WriteCustomCommandBuild(
  const std::string& command, const std::string& description,
  const std::string& comment, const std::string& depfile, bool uses_terminal,
  bool restat, const cmNinjaDeps& outputs, const cmNinjaDeps& deps,
  const cmNinjaDeps& orderOnly)
{
  std::string cmd = command; // NOLINT(*)
#ifdef _WIN32
  if (cmd.empty())
    // TODO Shouldn't an empty command be handled by ninja?
    cmd = "cmd.exe /c";
#endif

  this->AddCustomCommandRule();

  cmNinjaVars vars;
  vars["COMMAND"] = cmd;
  vars["DESC"] = EncodeLiteral(description);
  if (restat) {
    vars["restat"] = "1";
  }
  if (uses_terminal && SupportsConsolePool()) {
    vars["pool"] = "console";
  }
  if (!depfile.empty()) {
    vars["depfile"] = depfile;
  }
  this->WriteBuild(*this->BuildFileStream, comment, "CUSTOM_COMMAND", outputs,
                   /*implicitOuts=*/cmNinjaDeps(), deps, cmNinjaDeps(),
                   orderOnly, vars);

  if (this->ComputingUnknownDependencies) {
    // we need to track every dependency that comes in, since we are trying
    // to find dependencies that are side effects of build commands
    for (std::string const& dep : deps) {
      this->CombinedCustomCommandExplicitDependencies.insert(dep);
    }
  }
}

void cmGlobalNinjaGenerator::AddMacOSXContentRule()
{
  cmLocalGenerator* lg = this->LocalGenerators[0];

  std::ostringstream cmd;
  cmd << lg->ConvertToOutputFormat(cmSystemTools::GetCMakeCommand(),
                                   cmOutputConverter::SHELL)
      << " -E copy $in $out";

  this->AddRule("COPY_OSX_CONTENT", cmd.str(), "Copying OS X Content $out",
                "Rule for copying OS X bundle content file.",
                /*depfile*/ "",
                /*deptype*/ "",
                /*rspfile*/ "",
                /*rspcontent*/ "",
                /*restat*/ "",
                /*generator*/ false);
}

void cmGlobalNinjaGenerator::WriteMacOSXContentBuild(const std::string& input,
                                                     const std::string& output)
{
  this->AddMacOSXContentRule();

  cmNinjaDeps outputs;
  outputs.push_back(output);
  cmNinjaDeps deps;
  deps.push_back(input);
  cmNinjaVars vars;

  this->WriteBuild(*this->BuildFileStream, "", "COPY_OSX_CONTENT", outputs,
                   /*implicitOuts=*/cmNinjaDeps(), deps, cmNinjaDeps(),
                   cmNinjaDeps(), cmNinjaVars());
}

void cmGlobalNinjaGenerator::WriteRule(
  std::ostream& os, const std::string& name, const std::string& command,
  const std::string& description, const std::string& comment,
  const std::string& depfile, const std::string& deptype,
  const std::string& rspfile, const std::string& rspcontent,
  const std::string& restat, bool generator)
{
  // Make sure the rule has a name.
  if (name.empty()) {
    cmSystemTools::Error("No name given for WriteRuleStatement! called "
                         "with comment: ",
                         comment.c_str());
    return;
  }

  // Make sure a command is given.
  if (command.empty()) {
    cmSystemTools::Error("No command given for WriteRuleStatement! called "
                         "with comment: ",
                         comment.c_str());
    return;
  }

  cmGlobalNinjaGenerator::WriteComment(os, comment);

  // Write the rule.
  os << "rule " << name << "\n";

  // Write the depfile if any.
  if (!depfile.empty()) {
    cmGlobalNinjaGenerator::Indent(os, 1);
    os << "depfile = " << depfile << "\n";
  }

  // Write the deptype if any.
  if (!deptype.empty()) {
    cmGlobalNinjaGenerator::Indent(os, 1);
    os << "deps = " << deptype << "\n";
  }

  // Write the command.
  cmGlobalNinjaGenerator::Indent(os, 1);
  os << "command = " << command << "\n";

  // Write the description if any.
  if (!description.empty()) {
    cmGlobalNinjaGenerator::Indent(os, 1);
    os << "description = " << description << "\n";
  }

  if (!rspfile.empty()) {
    if (rspcontent.empty()) {
      cmSystemTools::Error("No rspfile_content given!", comment.c_str());
      return;
    }
    cmGlobalNinjaGenerator::Indent(os, 1);
    os << "rspfile = " << rspfile << "\n";
    cmGlobalNinjaGenerator::Indent(os, 1);
    os << "rspfile_content = " << rspcontent << "\n";
  }

  if (!restat.empty()) {
    cmGlobalNinjaGenerator::Indent(os, 1);
    os << "restat = " << restat << "\n";
  }

  if (generator) {
    cmGlobalNinjaGenerator::Indent(os, 1);
    os << "generator = 1\n";
  }

  os << "\n";
}

void cmGlobalNinjaGenerator::WriteVariable(std::ostream& os,
                                           const std::string& name,
                                           const std::string& value,
                                           const std::string& comment,
                                           int indent)
{
  // Make sure we have a name.
  if (name.empty()) {
    cmSystemTools::Error("No name given for WriteVariable! called "
                         "with comment: ",
                         comment.c_str());
    return;
  }

  // Do not add a variable if the value is empty.
  std::string val = cmSystemTools::TrimWhitespace(value);
  if (val.empty()) {
    return;
  }

  cmGlobalNinjaGenerator::WriteComment(os, comment);
  cmGlobalNinjaGenerator::Indent(os, indent);
  os << name << " = " << val << "\n";
}

void cmGlobalNinjaGenerator::WriteInclude(std::ostream& os,
                                          const std::string& filename,
                                          const std::string& comment)
{
  cmGlobalNinjaGenerator::WriteComment(os, comment);
  os << "include " << filename << "\n";
}

void cmGlobalNinjaGenerator::WriteDefault(std::ostream& os,
                                          const cmNinjaDeps& targets,
                                          const std::string& comment)
{
  cmGlobalNinjaGenerator::WriteComment(os, comment);
  os << "default";
  for (std::string const& target : targets) {
    os << " " << target;
  }
  os << "\n";
}

cmGlobalNinjaGenerator::cmGlobalNinjaGenerator(cmake* cm)
  : cmGlobalCommonGenerator(cm)
  , BuildFileStream(nullptr)
  , RulesFileStream(nullptr)
  , CompileCommandsStream(nullptr)
  , UsingGCCOnWindows(false)
  , ComputingUnknownDependencies(false)
  , PolicyCMP0058(cmPolicies::WARN)
  , NinjaSupportsConsolePool(false)
  , NinjaSupportsImplicitOuts(false)
  , NinjaSupportsManifestRestat(false)
  , NinjaSupportsMultilineDepfile(false)
  , NinjaSupportsDyndeps(0)
{
#ifdef _WIN32
  cm->GetState()->SetWindowsShell(true);
#endif
  // // Ninja is not ported to non-Unix OS yet.
  // this->ForceUnixPaths = true;
  this->FindMakeProgramFile = "CMakeNinjaFindMake.cmake";
}

// Virtual public methods.

cmLocalGenerator* cmGlobalNinjaGenerator::CreateLocalGenerator(cmMakefile* mf)
{
  return new cmLocalNinjaGenerator(this, mf);
}

codecvt::Encoding cmGlobalNinjaGenerator::GetMakefileEncoding() const
{
#ifdef _WIN32
  // Ninja on Windows does not support non-ANSI characters.
  // https://github.com/ninja-build/ninja/issues/1195
  return codecvt::ANSI;
#else
  // No encoding conversion needed on other platforms.
  return codecvt::None;
#endif
}

void cmGlobalNinjaGenerator::GetDocumentation(cmDocumentationEntry& entry)
{
  entry.Name = cmGlobalNinjaGenerator::GetActualName();
  entry.Brief = "Generates build.ninja files.";
}

// Implemented in all cmGlobaleGenerator sub-classes.
// Used in:
//   Source/cmLocalGenerator.cxx
//   Source/cmake.cxx
void cmGlobalNinjaGenerator::Generate()
{
  // Check minimum Ninja version.
  if (cmSystemTools::VersionCompare(cmSystemTools::OP_LESS,
                                    this->NinjaVersion.c_str(),
                                    RequiredNinjaVersion().c_str())) {
    std::ostringstream msg;
    msg << "The detected version of Ninja (" << this->NinjaVersion;
    msg << ") is less than the version of Ninja required by CMake (";
    msg << cmGlobalNinjaGenerator::RequiredNinjaVersion() << ").";
    this->GetCMakeInstance()->IssueMessage(MessageType::FATAL_ERROR,
                                           msg.str());
    return;
  }
  this->OpenBuildFileStream();
  this->OpenRulesFileStream();

  this->TargetDependsClosures.clear();

  this->InitOutputPathPrefix();
  this->TargetAll = this->NinjaOutputPath("all");
  this->CMakeCacheFile = this->NinjaOutputPath("CMakeCache.txt");

  this->PolicyCMP0058 =
    this->LocalGenerators[0]->GetMakefile()->GetPolicyStatus(
      cmPolicies::CMP0058);
  this->ComputingUnknownDependencies =
    (this->PolicyCMP0058 == cmPolicies::OLD ||
     this->PolicyCMP0058 == cmPolicies::WARN);

  this->cmGlobalGenerator::Generate();

  this->WriteAssumedSourceDependencies();
  this->WriteTargetAliases(*this->BuildFileStream);
  this->WriteFolderTargets(*this->BuildFileStream);
  this->WriteUnknownExplicitDependencies(*this->BuildFileStream);
  this->WriteBuiltinTargets(*this->BuildFileStream);

  if (cmSystemTools::GetErrorOccuredFlag()) {
    this->RulesFileStream->setstate(std::ios::failbit);
    this->BuildFileStream->setstate(std::ios::failbit);
  }

  this->CloseCompileCommandsStream();
  this->CloseRulesFileStream();
  this->CloseBuildFileStream();
}

bool cmGlobalNinjaGenerator::FindMakeProgram(cmMakefile* mf)
{
  if (!this->cmGlobalGenerator::FindMakeProgram(mf)) {
    return false;
  }
  if (const char* ninjaCommand = mf->GetDefinition("CMAKE_MAKE_PROGRAM")) {
    this->NinjaCommand = ninjaCommand;
    std::vector<std::string> command;
    command.push_back(this->NinjaCommand);
    command.emplace_back("--version");
    std::string version;
    std::string error;
    if (!cmSystemTools::RunSingleCommand(command, &version, &error, nullptr,
                                         nullptr,
                                         cmSystemTools::OUTPUT_NONE)) {
      mf->IssueMessage(MessageType::FATAL_ERROR,
                       "Running\n '" + cmJoin(command, "' '") +
                         "'\n"
                         "failed with:\n " +
                         error);
      cmSystemTools::SetFatalErrorOccured();
      return false;
    }
    this->NinjaVersion = cmSystemTools::TrimWhitespace(version);
    this->CheckNinjaFeatures();
  }
  return true;
}

void cmGlobalNinjaGenerator::CheckNinjaFeatures()
{
  this->NinjaSupportsConsolePool = !cmSystemTools::VersionCompare(
    cmSystemTools::OP_LESS, this->NinjaVersion.c_str(),
    RequiredNinjaVersionForConsolePool().c_str());
  this->NinjaSupportsImplicitOuts = !cmSystemTools::VersionCompare(
    cmSystemTools::OP_LESS, this->NinjaVersion.c_str(),
    cmGlobalNinjaGenerator::RequiredNinjaVersionForImplicitOuts().c_str());
  this->NinjaSupportsManifestRestat = !cmSystemTools::VersionCompare(
    cmSystemTools::OP_LESS, this->NinjaVersion.c_str(),
    RequiredNinjaVersionForManifestRestat().c_str());
  this->NinjaSupportsMultilineDepfile = !cmSystemTools::VersionCompare(
    cmSystemTools::OP_LESS, this->NinjaVersion.c_str(),
    RequiredNinjaVersionForMultilineDepfile().c_str());
  {
    // Our ninja branch adds ".dyndep-#" to its version number,
    // where '#' is a feature-specific version number.  Extract it.
    static std::string const k_DYNDEP_ = ".dyndep-";
    std::string::size_type pos = this->NinjaVersion.find(k_DYNDEP_);
    if (pos != std::string::npos) {
      const char* fv = this->NinjaVersion.c_str() + pos + k_DYNDEP_.size();
      cmSystemTools::StringToULong(fv, &this->NinjaSupportsDyndeps);
    }
  }
}

bool cmGlobalNinjaGenerator::CheckLanguages(
  std::vector<std::string> const& languages, cmMakefile* mf) const
{
  if (std::find(languages.begin(), languages.end(), "Fortran") !=
      languages.end()) {
    return this->CheckFortran(mf);
  }
  return true;
}

bool cmGlobalNinjaGenerator::CheckFortran(cmMakefile* mf) const
{
  if (this->NinjaSupportsDyndeps == 1) {
    return true;
  }

  std::ostringstream e;
  if (this->NinjaSupportsDyndeps == 0) {
    /* clang-format off */
    e <<
      "The Ninja generator does not support Fortran using Ninja version\n"
      "  " + this->NinjaVersion + "\n"
      "due to lack of required features.  "
      "Kitware has implemented the required features but as of this version "
      "of CMake they have not been integrated to upstream ninja.  "
      "Pending integration, Kitware maintains a branch at:\n"
      "  https://github.com/Kitware/ninja/tree/features-for-fortran#readme\n"
      "with the required features.  "
      "One may build ninja from that branch to get support for Fortran."
      ;
    /* clang-format on */
  } else {
    /* clang-format off */
    e <<
      "The Ninja generator in this version of CMake does not support Fortran "
      "using Ninja version\n"
      "  " + this->NinjaVersion + "\n"
      "because its 'dyndep' feature version is " <<
      this->NinjaSupportsDyndeps << ".  "
      "This version of CMake is aware only of 'dyndep' feature version 1."
      ;
    /* clang-format on */
  }
  mf->IssueMessage(MessageType::FATAL_ERROR, e.str());
  cmSystemTools::SetFatalErrorOccured();
  return false;
}

void cmGlobalNinjaGenerator::EnableLanguage(
  std::vector<std::string> const& langs, cmMakefile* mf, bool optional)
{
  this->cmGlobalGenerator::EnableLanguage(langs, mf, optional);
  for (std::string const& l : langs) {
    if (l == "NONE") {
      continue;
    }
    this->ResolveLanguageCompiler(l, mf, optional);
  }
#ifdef _WIN32
  if ((mf->GetSafeDefinition("CMAKE_C_SIMULATE_ID") != "MSVC") &&
      (mf->GetSafeDefinition("CMAKE_CXX_SIMULATE_ID") != "MSVC") &&
      (mf->IsOn("CMAKE_COMPILER_IS_MINGW") ||
       (mf->GetSafeDefinition("CMAKE_C_COMPILER_ID") == "GNU") ||
       (mf->GetSafeDefinition("CMAKE_CXX_COMPILER_ID") == "GNU") ||
       (mf->GetSafeDefinition("CMAKE_C_COMPILER_ID") == "Clang") ||
       (mf->GetSafeDefinition("CMAKE_CXX_COMPILER_ID") == "Clang"))) {
    this->UsingGCCOnWindows = true;
  }
#endif
}

// Implemented by:
//   cmGlobalUnixMakefileGenerator3
//   cmGlobalGhsMultiGenerator
//   cmGlobalVisualStudio10Generator
//   cmGlobalVisualStudio7Generator
//   cmGlobalXCodeGenerator
// Called by:
//   cmGlobalGenerator::Build()
void cmGlobalNinjaGenerator::GenerateBuildCommand(
  GeneratedMakeCommand& makeCommand, const std::string& makeProgram,
  const std::string& /*projectName*/, const std::string& /*projectDir*/,
  const std::string& targetName, const std::string& /*config*/, bool /*fast*/,
  int jobs, bool verbose, std::vector<std::string> const& makeOptions)
{
  makeCommand.add(this->SelectMakeProgram(makeProgram));

  if (verbose) {
    makeCommand.add("-v");
  }

  if ((jobs != cmake::NO_BUILD_PARALLEL_LEVEL) &&
      (jobs != cmake::DEFAULT_BUILD_PARALLEL_LEVEL)) {
    makeCommand.add("-j", std::to_string(jobs));
  }

  makeCommand.add(makeOptions.begin(), makeOptions.end());
  if (!targetName.empty()) {
    if (targetName == "clean") {
      makeCommand.add("-t", "clean");
    } else {
      makeCommand.add(targetName);
    }
  }
}

// Non-virtual public methods.

void cmGlobalNinjaGenerator::AddRule(
  const std::string& name, const std::string& command,
  const std::string& description, const std::string& comment,
  const std::string& depfile, const std::string& deptype,
  const std::string& rspfile, const std::string& rspcontent,
  const std::string& restat, bool generator)
{
  // Do not add the same rule twice.
  if (this->HasRule(name)) {
    return;
  }

  this->Rules.insert(name);
  cmGlobalNinjaGenerator::WriteRule(*this->RulesFileStream, name, command,
                                    description, comment, depfile, deptype,
                                    rspfile, rspcontent, restat, generator);

  this->RuleCmdLength[name] = static_cast<int>(command.size());
}

bool cmGlobalNinjaGenerator::HasRule(const std::string& name)
{
  RulesSetType::const_iterator rule = this->Rules.find(name);
  return (rule != this->Rules.end());
}

// Private virtual overrides

std::string cmGlobalNinjaGenerator::GetEditCacheCommand() const
{
  // Ninja by design does not run interactive tools in the terminal,
  // so our only choice is cmake-gui.
  return cmSystemTools::GetCMakeGUICommand();
}

void cmGlobalNinjaGenerator::ComputeTargetObjectDirectory(
  cmGeneratorTarget* gt) const
{
  // Compute full path to object file directory for this target.
  std::string dir;
  dir += gt->LocalGenerator->GetCurrentBinaryDirectory();
  dir += "/";
  dir += gt->LocalGenerator->GetTargetDirectory(gt);
  dir += "/";
  gt->ObjectDirectory = dir;
}

// Private methods

void cmGlobalNinjaGenerator::OpenBuildFileStream()
{
  // Compute Ninja's build file path.
  std::string buildFilePath =
    this->GetCMakeInstance()->GetHomeOutputDirectory();
  buildFilePath += "/";
  buildFilePath += cmGlobalNinjaGenerator::NINJA_BUILD_FILE;

  // Get a stream where to generate things.
  if (!this->BuildFileStream) {
    this->BuildFileStream = new cmGeneratedFileStream(
      buildFilePath, false, this->GetMakefileEncoding());
    if (!this->BuildFileStream) {
      // An error message is generated by the constructor if it cannot
      // open the file.
      return;
    }
  }

  // Write the do not edit header.
  this->WriteDisclaimer(*this->BuildFileStream);

  // Write a comment about this file.
  *this->BuildFileStream
    << "# This file contains all the build statements describing the\n"
    << "# compilation DAG.\n\n";
}

void cmGlobalNinjaGenerator::CloseBuildFileStream()
{
  if (this->BuildFileStream) {
    delete this->BuildFileStream;
    this->BuildFileStream = nullptr;
  } else {
    cmSystemTools::Error("Build file stream was not open.");
  }
}

void cmGlobalNinjaGenerator::OpenRulesFileStream()
{
  // Compute Ninja's build file path.
  std::string rulesFilePath =
    this->GetCMakeInstance()->GetHomeOutputDirectory();
  rulesFilePath += "/";
  rulesFilePath += cmGlobalNinjaGenerator::NINJA_RULES_FILE;

  // Get a stream where to generate things.
  if (!this->RulesFileStream) {
    this->RulesFileStream = new cmGeneratedFileStream(
      rulesFilePath, false, this->GetMakefileEncoding());
    if (!this->RulesFileStream) {
      // An error message is generated by the constructor if it cannot
      // open the file.
      return;
    }
  }

  // Write the do not edit header.
  this->WriteDisclaimer(*this->RulesFileStream);

  // Write comment about this file.
  /* clang-format off */
  *this->RulesFileStream
    << "# This file contains all the rules used to get the outputs files\n"
    << "# built from the input files.\n"
    << "# It is included in the main '" << NINJA_BUILD_FILE << "'.\n\n"
    ;
  /* clang-format on */
}

void cmGlobalNinjaGenerator::CloseRulesFileStream()
{
  if (this->RulesFileStream) {
    delete this->RulesFileStream;
    this->RulesFileStream = nullptr;
  } else {
    cmSystemTools::Error("Rules file stream was not open.");
  }
}

static void EnsureTrailingSlash(std::string& path)
{
  if (path.empty()) {
    return;
  }
  std::string::value_type last = path.back();
#ifdef _WIN32
  if (last != '\\') {
    path += '\\';
  }
#else
  if (last != '/') {
    path += '/';
  }
#endif
}

std::string const& cmGlobalNinjaGenerator::ConvertToNinjaPath(
  const std::string& path) const
{
  auto const f = ConvertToNinjaPathCache.find(path);
  if (f != ConvertToNinjaPathCache.end()) {
    return f->second;
  }

  cmLocalNinjaGenerator* ng =
    static_cast<cmLocalNinjaGenerator*>(this->LocalGenerators[0]);
  std::string const& bin_dir = ng->GetState()->GetBinaryDirectory();
  std::string convPath = ng->MaybeConvertToRelativePath(bin_dir, path);
  convPath = this->NinjaOutputPath(convPath);
#ifdef _WIN32
  std::replace(convPath.begin(), convPath.end(), '/', '\\');
#endif
  return ConvertToNinjaPathCache.emplace(path, std::move(convPath))
    .first->second;
}

void cmGlobalNinjaGenerator::AddCXXCompileCommand(
  const std::string& commandLine, const std::string& sourceFile)
{
  // Compute Ninja's build file path.
  std::string buildFileDir =
    this->GetCMakeInstance()->GetHomeOutputDirectory();
  if (!this->CompileCommandsStream) {
    std::string buildFilePath = buildFileDir + "/compile_commands.json";
    if (this->ComputingUnknownDependencies) {
      this->CombinedBuildOutputs.insert(
        this->NinjaOutputPath("compile_commands.json"));
    }

    // Get a stream where to generate things.
    this->CompileCommandsStream = new cmGeneratedFileStream(buildFilePath);
    *this->CompileCommandsStream << "[";
  } else {
    *this->CompileCommandsStream << "," << std::endl;
  }

  std::string sourceFileName = sourceFile;
  if (!cmSystemTools::FileIsFullPath(sourceFileName)) {
    sourceFileName = cmSystemTools::CollapseFullPath(
      sourceFileName, this->GetCMakeInstance()->GetHomeOutputDirectory());
  }

  /* clang-format off */
  *this->CompileCommandsStream << "\n{\n"
     << "  \"directory\": \""
     << cmGlobalGenerator::EscapeJSON(buildFileDir) << "\",\n"
     << "  \"command\": \""
     << cmGlobalGenerator::EscapeJSON(commandLine) << "\",\n"
     << "  \"file\": \""
     << cmGlobalGenerator::EscapeJSON(sourceFileName) << "\"\n"
     << "}";
  /* clang-format on */
}

void cmGlobalNinjaGenerator::CloseCompileCommandsStream()
{
  if (this->CompileCommandsStream) {
    *this->CompileCommandsStream << "\n]";
    delete this->CompileCommandsStream;
    this->CompileCommandsStream = nullptr;
  }
}

void cmGlobalNinjaGenerator::WriteDisclaimer(std::ostream& os)
{
  os << "# CMAKE generated file: DO NOT EDIT!\n"
     << "# Generated by \"" << this->GetName() << "\""
     << " Generator, CMake Version " << cmVersion::GetMajorVersion() << "."
     << cmVersion::GetMinorVersion() << "\n\n";
}

void cmGlobalNinjaGenerator::AddDependencyToAll(cmGeneratorTarget* target)
{
  this->AppendTargetOutputs(target, this->AllDependencies);
}

void cmGlobalNinjaGenerator::AddDependencyToAll(const std::string& input)
{
  this->AllDependencies.push_back(input);
}

void cmGlobalNinjaGenerator::WriteAssumedSourceDependencies()
{
  for (auto const& asd : this->AssumedSourceDependencies) {
    cmNinjaDeps orderOnlyDeps;
    std::copy(asd.second.begin(), asd.second.end(),
              std::back_inserter(orderOnlyDeps));
    WriteCustomCommandBuild(/*command=*/"", /*description=*/"",
                            "Assume dependencies for generated source file.",
                            /*depfile*/ "", /*uses_terminal*/ false,
                            /*restat*/ true, cmNinjaDeps(1, asd.first),
                            cmNinjaDeps(), orderOnlyDeps);
  }
}

std::string OrderDependsTargetForTarget(cmGeneratorTarget const* target)
{
  return "cmake_object_order_depends_target_" + target->GetName();
}

void cmGlobalNinjaGenerator::AppendTargetOutputs(
  cmGeneratorTarget const* target, cmNinjaDeps& outputs,
  cmNinjaTargetDepends depends)
{
  std::string configName =
    target->Target->GetMakefile()->GetSafeDefinition("CMAKE_BUILD_TYPE");

  // for frameworks, we want the real name, not smple name
  // frameworks always appear versioned, and the build.ninja
  // will always attempt to manage symbolic links instead
  // of letting cmOSXBundleGenerator do it.
  bool realname = target->IsFrameworkOnApple();

  switch (target->GetType()) {
    case cmStateEnums::SHARED_LIBRARY:
    case cmStateEnums::STATIC_LIBRARY:
    case cmStateEnums::MODULE_LIBRARY: {
      if (depends == DependOnTargetOrdering) {
        outputs.push_back(OrderDependsTargetForTarget(target));
        break;
      }
    }
    // FALLTHROUGH
    case cmStateEnums::EXECUTABLE: {
      outputs.push_back(this->ConvertToNinjaPath(target->GetFullPath(
        configName, cmStateEnums::RuntimeBinaryArtifact, realname)));
      break;
    }
    case cmStateEnums::OBJECT_LIBRARY: {
      if (depends == DependOnTargetOrdering) {
        outputs.push_back(OrderDependsTargetForTarget(target));
        break;
      }
    }
    // FALLTHROUGH
    case cmStateEnums::GLOBAL_TARGET:
    case cmStateEnums::UTILITY: {
      std::string path =
        target->GetLocalGenerator()->GetCurrentBinaryDirectory() +
        std::string("/") + target->GetName();
      outputs.push_back(this->ConvertToNinjaPath(path));
      break;
    }

    default:
      return;
  }
}

void cmGlobalNinjaGenerator::AppendTargetDepends(
  cmGeneratorTarget const* target, cmNinjaDeps& outputs,
  cmNinjaTargetDepends depends)
{
  if (target->GetType() == cmStateEnums::GLOBAL_TARGET) {
    // These depend only on other CMake-provided targets, e.g. "all".
    std::set<BT<std::string>> const& utils = target->GetUtilities();
    for (BT<std::string> const& util : utils) {
      std::string d =
        target->GetLocalGenerator()->GetCurrentBinaryDirectory() + "/" +
        util.Value;
      outputs.push_back(this->ConvertToNinjaPath(d));
    }
  } else {
    cmNinjaDeps outs;
    cmTargetDependSet const& targetDeps = this->GetTargetDirectDepends(target);
    for (cmTargetDepend const& targetDep : targetDeps) {
      if (targetDep->GetType() == cmStateEnums::INTERFACE_LIBRARY) {
        continue;
      }
      this->AppendTargetOutputs(targetDep, outs, depends);
    }
    std::sort(outs.begin(), outs.end());
    outputs.insert(outputs.end(), outs.begin(), outs.end());
  }
}

void cmGlobalNinjaGenerator::AppendTargetDependsClosure(
  cmGeneratorTarget const* target, cmNinjaDeps& outputs)
{
  cmNinjaOuts outs;
  this->AppendTargetDependsClosure(target, outs, true);

  outputs.insert(outputs.end(), outs.begin(), outs.end());
}

void cmGlobalNinjaGenerator::AppendTargetDependsClosure(
  cmGeneratorTarget const* target, cmNinjaOuts& outputs, bool omit_self)
{

  // try to locate the target in the cache
  auto find = this->TargetDependsClosures.lower_bound(target);

  if (find == this->TargetDependsClosures.end() || find->first != target) {
    // We now calculate the closure outputs by inspecting the dependent
    // targets recursively.
    // For that we have to distinguish between a local result set that is only
    // relevant for filling the cache entries properly isolated and a global
    // result set that is relevant for the result of the top level call to
    // AppendTargetDependsClosure.
    auto const& targetDeps = this->GetTargetDirectDepends(target);
    cmNinjaOuts this_outs; // this will be the new cache entry

    for (auto const& dep_target : targetDeps) {
      if (dep_target->GetType() == cmStateEnums::INTERFACE_LIBRARY) {
        continue;
      }

      // Collect the dependent targets for _this_ target
      this->AppendTargetDependsClosure(dep_target, this_outs, false);
    }
    find = this->TargetDependsClosures.emplace_hint(find, target,
                                                    std::move(this_outs));
  }

  // now fill the outputs of the final result from the newly generated cache
  // entry
  outputs.insert(find->second.begin(), find->second.end());

  // finally generate the outputs of the target itself, if applicable
  cmNinjaDeps outs;
  if (!omit_self) {
    this->AppendTargetOutputs(target, outs);
  }
  outputs.insert(outs.begin(), outs.end());
}

void cmGlobalNinjaGenerator::AddTargetAlias(const std::string& alias,
                                            cmGeneratorTarget* target)
{
  std::string buildAlias = this->NinjaOutputPath(alias);
  cmNinjaDeps outputs;
  this->AppendTargetOutputs(target, outputs);
  // Mark the target's outputs as ambiguous to ensure that no other target uses
  // the output as an alias.
  for (std::string const& output : outputs) {
    TargetAliases[output] = nullptr;
  }

  // Insert the alias into the map.  If the alias was already present in the
  // map and referred to another target, mark it as ambiguous.
  std::pair<TargetAliasMap::iterator, bool> newAlias =
    TargetAliases.insert(std::make_pair(buildAlias, target));
  if (newAlias.second && newAlias.first->second != target) {
    newAlias.first->second = nullptr;
  }
}

void cmGlobalNinjaGenerator::WriteTargetAliases(std::ostream& os)
{
  cmGlobalNinjaGenerator::WriteDivider(os);
  os << "# Target aliases.\n\n";

  for (auto const& ta : TargetAliases) {
    // Don't write ambiguous aliases.
    if (!ta.second) {
      continue;
    }

    // Don't write alias if there is a already a custom command with
    // matching output
    if (this->HasCustomCommandOutput(ta.first)) {
      continue;
    }

    cmNinjaDeps deps;
    this->AppendTargetOutputs(ta.second, deps);

    this->WritePhonyBuild(os, "", cmNinjaDeps(1, ta.first), deps);
  }
}

void cmGlobalNinjaGenerator::WriteFolderTargets(std::ostream& os)
{
  cmGlobalNinjaGenerator::WriteDivider(os);
  os << "# Folder targets.\n\n";

  std::map<std::string, cmNinjaDeps> targetsPerFolder;
  for (cmLocalGenerator const* lg : this->LocalGenerators) {
    const std::string currentBinaryFolder(
      lg->GetStateSnapshot().GetDirectory().GetCurrentBinary());
    // The directory-level rule should depend on the target-level rules
    // for all targets in the directory.
    targetsPerFolder[currentBinaryFolder] = cmNinjaDeps();
    for (auto gt : lg->GetGeneratorTargets()) {
      cmStateEnums::TargetType const type = gt->GetType();
      if ((type == cmStateEnums::EXECUTABLE ||
           type == cmStateEnums::STATIC_LIBRARY ||
           type == cmStateEnums::SHARED_LIBRARY ||
           type == cmStateEnums::MODULE_LIBRARY ||
           type == cmStateEnums::OBJECT_LIBRARY ||
           type == cmStateEnums::UTILITY) &&
          !gt->GetPropertyAsBool("EXCLUDE_FROM_ALL")) {
        targetsPerFolder[currentBinaryFolder].push_back(gt->GetName());
      }
    }

    // The directory-level rule should depend on the directory-level
    // rules of the subdirectories.
    std::vector<cmStateSnapshot> const& children =
      lg->GetStateSnapshot().GetChildren();
    for (cmStateSnapshot const& state : children) {
      std::string const currentBinaryDir =
        state.GetDirectory().GetCurrentBinary();

      targetsPerFolder[currentBinaryFolder].push_back(
        this->ConvertToNinjaPath(currentBinaryDir + "/all"));
    }
  }

  std::string const rootBinaryDir =
    this->LocalGenerators[0]->GetBinaryDirectory();
  for (auto const& it : targetsPerFolder) {
    cmGlobalNinjaGenerator::WriteDivider(os);
    std::string const& currentBinaryDir = it.first;

    // Do not generate a rule for the root binary dir.
    if (rootBinaryDir.length() >= currentBinaryDir.length()) {
      continue;
    }

    std::string const comment = "Folder: " + currentBinaryDir;
    cmNinjaDeps output(1);
    output.push_back(this->ConvertToNinjaPath(currentBinaryDir + "/all"));

    this->WritePhonyBuild(os, comment, output, it.second);
  }
}

void cmGlobalNinjaGenerator::WriteUnknownExplicitDependencies(std::ostream& os)
{
  if (!this->ComputingUnknownDependencies) {
    return;
  }

  // We need to collect the set of known build outputs.
  // Start with those generated by WriteBuild calls.
  // No other method needs this so we can take ownership
  // of the set locally and throw it out when we are done.
  std::set<std::string> knownDependencies;
  knownDependencies.swap(this->CombinedBuildOutputs);

  // now write out the unknown explicit dependencies.

  // union the configured files, evaluations files and the
  // CombinedBuildOutputs,
  // and then difference with CombinedExplicitDependencies to find the explicit
  // dependencies that we have no rule for

  cmGlobalNinjaGenerator::WriteDivider(os);
  /* clang-format off */
  os << "# Unknown Build Time Dependencies.\n"
     << "# Tell Ninja that they may appear as side effects of build rules\n"
     << "# otherwise ordered by order-only dependencies.\n\n";
  /* clang-format on */

  // get the list of files that cmake itself has generated as a
  // product of configuration.

  for (cmLocalGenerator* lg : this->LocalGenerators) {
    // get the vector of files created by this makefile and convert them
    // to ninja paths, which are all relative in respect to the build directory
    const std::vector<std::string>& files =
      lg->GetMakefile()->GetOutputFiles();
    for (std::string const& file : files) {
      knownDependencies.insert(this->ConvertToNinjaPath(file));
    }
    if (!this->GlobalSettingIsOn("CMAKE_SUPPRESS_REGENERATION")) {
      // get list files which are implicit dependencies as well and will be
      // phony for rebuild manifest
      std::vector<std::string> const& lf = lg->GetMakefile()->GetListFiles();
      for (std::string const& j : lf) {
        knownDependencies.insert(this->ConvertToNinjaPath(j));
      }
    }
    std::vector<cmGeneratorExpressionEvaluationFile*> const& ef =
      lg->GetMakefile()->GetEvaluationFiles();
    for (cmGeneratorExpressionEvaluationFile* li : ef) {
      // get all the files created by generator expressions and convert them
      // to ninja paths
      std::vector<std::string> evaluationFiles = li->GetFiles();
      for (std::string const& evaluationFile : evaluationFiles) {
        knownDependencies.insert(this->ConvertToNinjaPath(evaluationFile));
      }
    }
  }
  knownDependencies.insert(this->CMakeCacheFile);

  for (auto const& ta : this->TargetAliases) {
    knownDependencies.insert(this->ConvertToNinjaPath(ta.first));
  }

  // remove all source files we know will exist.
  for (auto const& i : this->AssumedSourceDependencies) {
    knownDependencies.insert(this->ConvertToNinjaPath(i.first));
  }

  // now we difference with CombinedCustomCommandExplicitDependencies to find
  // the list of items we know nothing about.
  // We have encoded all the paths in CombinedCustomCommandExplicitDependencies
  // and knownDependencies so no matter if unix or windows paths they
  // should all match now.

  std::vector<std::string> unknownExplicitDepends;
  this->CombinedCustomCommandExplicitDependencies.erase(this->TargetAll);

  std::set_difference(this->CombinedCustomCommandExplicitDependencies.begin(),
                      this->CombinedCustomCommandExplicitDependencies.end(),
                      knownDependencies.begin(), knownDependencies.end(),
                      std::back_inserter(unknownExplicitDepends));

  std::string const rootBuildDirectory =
    this->GetCMakeInstance()->GetHomeOutputDirectory();
  bool const inSourceBuild =
    (rootBuildDirectory == this->GetCMakeInstance()->GetHomeDirectory());
  std::vector<std::string> warnExplicitDepends;
  for (std::string const& i : unknownExplicitDepends) {
    // verify the file is in the build directory
    std::string const absDepPath =
      cmSystemTools::CollapseFullPath(i, rootBuildDirectory.c_str());
    bool const inBuildDir =
      cmSystemTools::IsSubDirectory(absDepPath, rootBuildDirectory);
    if (inBuildDir) {
      cmNinjaDeps deps(1, i);
      this->WritePhonyBuild(os, "", deps, cmNinjaDeps());
      if (this->PolicyCMP0058 == cmPolicies::WARN && !inSourceBuild &&
          warnExplicitDepends.size() < 10) {
        warnExplicitDepends.push_back(i);
      }
    }
  }

  if (!warnExplicitDepends.empty()) {
    std::ostringstream w;
    /* clang-format off */
    w << cmPolicies::GetPolicyWarning(cmPolicies::CMP0058) << "\n"
      "This project specifies custom command DEPENDS on files "
      "in the build tree that are not specified as the OUTPUT or "
      "BYPRODUCTS of any add_custom_command or add_custom_target:\n"
      " " << cmJoin(warnExplicitDepends, "\n ") <<
      "\n"
      "For compatibility with versions of CMake that did not have "
      "the BYPRODUCTS option, CMake is generating phony rules for "
      "such files to convince 'ninja' to build."
      "\n"
      "Project authors should add the missing BYPRODUCTS or OUTPUT "
      "options to the custom commands that produce these files."
      ;
    /* clang-format on */
    this->GetCMakeInstance()->IssueMessage(MessageType::AUTHOR_WARNING,
                                           w.str());
  }
}

void cmGlobalNinjaGenerator::WriteBuiltinTargets(std::ostream& os)
{
  // Write headers.
  cmGlobalNinjaGenerator::WriteDivider(os);
  os << "# Built-in targets\n\n";

  this->WriteTargetAll(os);
  this->WriteTargetRebuildManifest(os);
  this->WriteTargetClean(os);
  this->WriteTargetHelp(os);
}

void cmGlobalNinjaGenerator::WriteTargetAll(std::ostream& os)
{
  cmNinjaDeps outputs;
  outputs.push_back(this->TargetAll);

  this->WritePhonyBuild(os, "The main all target.", outputs,
                        this->AllDependencies);

  if (!this->HasOutputPathPrefix()) {
    cmGlobalNinjaGenerator::WriteDefault(os, outputs,
                                         "Make the all target the default.");
  }
}

void cmGlobalNinjaGenerator::WriteTargetRebuildManifest(std::ostream& os)
{
  if (this->GlobalSettingIsOn("CMAKE_SUPPRESS_REGENERATION")) {
    return;
  }
  cmLocalGenerator* lg = this->LocalGenerators[0];

  std::ostringstream cmd;
  cmd << lg->ConvertToOutputFormat(cmSystemTools::GetCMakeCommand(),
                                   cmOutputConverter::SHELL)
      << " -S"
      << lg->ConvertToOutputFormat(lg->GetSourceDirectory(),
                                   cmOutputConverter::SHELL)
      << " -B"
      << lg->ConvertToOutputFormat(lg->GetBinaryDirectory(),
                                   cmOutputConverter::SHELL);
  WriteRule(*this->RulesFileStream, "RERUN_CMAKE", cmd.str(),
            "Re-running CMake...", "Rule for re-running cmake.",
            /*depfile=*/"",
            /*deptype=*/"",
            /*rspfile=*/"",
            /*rspcontent*/ "",
            /*restat=*/"",
            /*generator=*/true);

  cmNinjaDeps implicitDeps;
  cmNinjaDeps explicitDeps;
  for (cmLocalGenerator* localGen : this->LocalGenerators) {
    std::vector<std::string> const& lf =
      localGen->GetMakefile()->GetListFiles();
    for (std::string const& fi : lf) {
      implicitDeps.push_back(this->ConvertToNinjaPath(fi));
    }
  }
  implicitDeps.push_back(this->CMakeCacheFile);

  cmNinjaVars variables;
  // Use 'console' pool to get non buffered output of the CMake re-run call
  // Available since Ninja 1.5
  if (SupportsConsolePool()) {
    variables["pool"] = "console";
  }

  cmake* cm = this->GetCMakeInstance();
  if (this->SupportsManifestRestat() && cm->DoWriteGlobVerifyTarget()) {
    std::ostringstream verify_cmd;
    verify_cmd << lg->ConvertToOutputFormat(cmSystemTools::GetCMakeCommand(),
                                            cmOutputConverter::SHELL)
               << " -P "
               << lg->ConvertToOutputFormat(cm->GetGlobVerifyScript(),
                                            cmOutputConverter::SHELL);

    WriteRule(*this->RulesFileStream, "VERIFY_GLOBS", verify_cmd.str(),
              "Re-checking globbed directories...",
              "Rule for re-checking globbed directories.",
              /*depfile=*/"",
              /*deptype=*/"",
              /*rspfile=*/"",
              /*rspcontent*/ "",
              /*restat=*/"",
              /*generator=*/true);

    std::string verifyForce = cm->GetGlobVerifyScript() + "_force";
    cmNinjaDeps verifyForceDeps(1, this->NinjaOutputPath(verifyForce));

    this->WritePhonyBuild(os, "Phony target to force glob verification run.",
                          verifyForceDeps, cmNinjaDeps());

    variables["restat"] = "1";
    std::string const verifyScriptFile =
      this->NinjaOutputPath(cm->GetGlobVerifyScript());
    std::string const verifyStampFile =
      this->NinjaOutputPath(cm->GetGlobVerifyStamp());
    this->WriteBuild(os,
                     "Re-run CMake to check if globbed directories changed.",
                     "VERIFY_GLOBS",
                     /*outputs=*/cmNinjaDeps(1, verifyStampFile),
                     /*implicitOuts=*/cmNinjaDeps(),
                     /*explicitDeps=*/cmNinjaDeps(),
                     /*implicitDeps=*/verifyForceDeps,
                     /*orderOnlyDeps=*/cmNinjaDeps(), variables);

    variables.erase("restat");
    implicitDeps.push_back(verifyScriptFile);
    explicitDeps.push_back(verifyStampFile);
  } else if (!this->SupportsManifestRestat() &&
             cm->DoWriteGlobVerifyTarget()) {
    std::ostringstream msg;
    msg << "The detected version of Ninja:\n"
        << "  " << this->NinjaVersion << "\n"
        << "is less than the version of Ninja required by CMake for adding "
           "restat dependencies to the build.ninja manifest regeneration "
           "target:\n"
        << "  "
        << cmGlobalNinjaGenerator::RequiredNinjaVersionForManifestRestat()
        << "\n";
    msg << "Any pre-check scripts, such as those generated for file(GLOB "
           "CONFIGURE_DEPENDS), will not be run by Ninja.";
    this->GetCMakeInstance()->IssueMessage(MessageType::AUTHOR_WARNING,
                                           msg.str());
  }

  std::sort(implicitDeps.begin(), implicitDeps.end());
  implicitDeps.erase(std::unique(implicitDeps.begin(), implicitDeps.end()),
                     implicitDeps.end());

  std::string const ninjaBuildFile = this->NinjaOutputPath(NINJA_BUILD_FILE);
  this->WriteBuild(os, "Re-run CMake if any of its inputs changed.",
                   "RERUN_CMAKE",
                   /*outputs=*/cmNinjaDeps(1, ninjaBuildFile),
                   /*implicitOuts=*/cmNinjaDeps(), explicitDeps, implicitDeps,
                   /*orderOnlyDeps=*/cmNinjaDeps(), variables);

  cmNinjaDeps missingInputs;
  std::set_difference(std::make_move_iterator(implicitDeps.begin()),
                      std::make_move_iterator(implicitDeps.end()),
                      CustomCommandOutputs.begin(), CustomCommandOutputs.end(),
                      std::back_inserter(missingInputs));

  this->WritePhonyBuild(os, "A missing CMake input file is not an error.",
                        missingInputs, cmNinjaDeps());
}

std::string cmGlobalNinjaGenerator::ninjaCmd() const
{
  cmLocalGenerator* lgen = this->LocalGenerators[0];
  if (lgen) {
    return lgen->ConvertToOutputFormat(this->NinjaCommand,
                                       cmOutputConverter::SHELL);
  }
  return "ninja";
}

bool cmGlobalNinjaGenerator::SupportsConsolePool() const
{
  return this->NinjaSupportsConsolePool;
}

bool cmGlobalNinjaGenerator::SupportsImplicitOuts() const
{
  return this->NinjaSupportsImplicitOuts;
}

bool cmGlobalNinjaGenerator::SupportsManifestRestat() const
{
  return this->NinjaSupportsManifestRestat;
}

bool cmGlobalNinjaGenerator::SupportsMultilineDepfile() const
{
  return this->NinjaSupportsMultilineDepfile;
}

void cmGlobalNinjaGenerator::WriteTargetClean(std::ostream& os)
{
  WriteRule(*this->RulesFileStream, "CLEAN", ninjaCmd() + " -t clean",
            "Cleaning all built files...",
            "Rule for cleaning all built files.",
            /*depfile=*/"",
            /*deptype=*/"",
            /*rspfile=*/"",
            /*rspcontent*/ "",
            /*restat=*/"",
            /*generator=*/false);
  WriteBuild(os, "Clean all the built files.", "CLEAN",
             /*outputs=*/cmNinjaDeps(1, this->NinjaOutputPath("clean")),
             /*implicitOuts=*/cmNinjaDeps(),
             /*explicitDeps=*/cmNinjaDeps(),
             /*implicitDeps=*/cmNinjaDeps(),
             /*orderOnlyDeps=*/cmNinjaDeps(),
             /*variables=*/cmNinjaVars());
}

void cmGlobalNinjaGenerator::WriteTargetHelp(std::ostream& os)
{
  WriteRule(*this->RulesFileStream, "HELP", ninjaCmd() + " -t targets",
            "All primary targets available:",
            "Rule for printing all primary targets available.",
            /*depfile=*/"",
            /*deptype=*/"",
            /*rspfile=*/"",
            /*rspcontent*/ "",
            /*restat=*/"",
            /*generator=*/false);
  WriteBuild(os, "Print all primary targets available.", "HELP",
             /*outputs=*/cmNinjaDeps(1, this->NinjaOutputPath("help")),
             /*implicitOuts=*/cmNinjaDeps(),
             /*explicitDeps=*/cmNinjaDeps(),
             /*implicitDeps=*/cmNinjaDeps(),
             /*orderOnlyDeps=*/cmNinjaDeps(),
             /*variables=*/cmNinjaVars());
}

void cmGlobalNinjaGenerator::InitOutputPathPrefix()
{
  this->OutputPathPrefix =
    this->LocalGenerators[0]->GetMakefile()->GetSafeDefinition(
      "CMAKE_NINJA_OUTPUT_PATH_PREFIX");
  EnsureTrailingSlash(this->OutputPathPrefix);
}

std::string cmGlobalNinjaGenerator::NinjaOutputPath(
  std::string const& path) const
{
  if (!this->HasOutputPathPrefix() || cmSystemTools::FileIsFullPath(path)) {
    return path;
  }
  return this->OutputPathPrefix + path;
}

void cmGlobalNinjaGenerator::StripNinjaOutputPathPrefixAsSuffix(
  std::string& path)
{
  if (path.empty()) {
    return;
  }
  EnsureTrailingSlash(path);
  cmStripSuffixIfExists(path, this->OutputPathPrefix);
}

/*

We use the following approach to support Fortran.  Each target already
has a <target>.dir/ directory used to hold intermediate files for CMake.
For each target, a FortranDependInfo.json file is generated by CMake with
information about include directories, module directories, and the locations
the per-target directories for target dependencies.

Compilation of source files within a target is split into the following steps:

1. Preprocess all sources, scan preprocessed output for module dependencies.
   This step is done with independent build statements for each source,
   and can therefore be done in parallel.

    rule Fortran_PREPROCESS
      depfile = $DEP_FILE
      command = gfortran -cpp $DEFINES $INCLUDES $FLAGS -E $in -o $out &&
                cmake -E cmake_ninja_depends \
                  --tdi=FortranDependInfo.json --pp=$out --dep=$DEP_FILE \
                  --obj=$OBJ_FILE --ddi=$DYNDEP_INTERMEDIATE_FILE

    build src.f90-pp.f90 | src.f90-pp.f90.ddi: Fortran_PREPROCESS src.f90
      OBJ_FILE = src.f90.o
      DEP_FILE = src.f90-pp.f90.d
      DYNDEP_INTERMEDIATE_FILE = src.f90-pp.f90.ddi

   The ``cmake -E cmake_ninja_depends`` tool reads the preprocessed output
   and generates the ninja depfile for preprocessor dependencies.  It also
   generates a "ddi" file (in a format private to CMake) that lists the
   object file that compilation will produce along with the module names
   it provides and/or requires.  The "ddi" file is an implicit output
   because it should not appear in "$out" but is generated by the rule.

2. Consolidate the per-source module dependencies saved in the "ddi"
   files from all sources to produce a ninja "dyndep" file, ``Fortran.dd``.

    rule Fortran_DYNDEP
      command = cmake -E cmake_ninja_dyndep \
                  --tdi=FortranDependInfo.json --dd=$out $in

    build Fortran.dd: Fortran_DYNDEP src1.f90-pp.f90.ddi src2.f90-pp.f90.ddi

   The ``cmake -E cmake_ninja_dyndep`` tool reads the "ddi" files from all
   sources in the target and the ``FortranModules.json`` files from targets
   on which the target depends.  It computes dependency edges on compilations
   that require modules to those that provide the modules.  This information
   is placed in the ``Fortran.dd`` file for ninja to load later.  It also
   writes the expected location of modules provided by this target into
   ``FortranModules.json`` for use by dependent targets.

3. Compile all sources after loading dynamically discovered dependencies
   of the compilation build statements from their ``dyndep`` bindings.

    rule Fortran_COMPILE
      command = gfortran $INCLUDES $FLAGS -c $in -o $out

    build src1.f90.o: Fortran_COMPILE src1.f90-pp.f90 || Fortran.dd
      dyndep = Fortran.dd

   The "dyndep" binding tells ninja to load dynamically discovered
   dependency information from ``Fortran.dd``.  This adds information
   such as:

    build src1.f90.o | mod1.mod: dyndep
      restat = 1

   This tells ninja that ``mod1.mod`` is an implicit output of compiling
   the object file ``src1.f90.o``.  The ``restat`` binding tells it that
   the timestamp of the output may not always change.  Additionally:

    build src2.f90.o: dyndep | mod1.mod

   This tells ninja that ``mod1.mod`` is a dependency of compiling the
   object file ``src2.f90.o``.  This ensures that ``src1.f90.o`` and
   ``mod1.mod`` will always be up to date before ``src2.f90.o`` is built
   (because the latter consumes the module).
*/

int cmcmd_cmake_ninja_depends(std::vector<std::string>::const_iterator argBeg,
                              std::vector<std::string>::const_iterator argEnd)
{
  std::string arg_tdi;
  std::string arg_pp;
  std::string arg_dep;
  std::string arg_obj;
  std::string arg_ddi;
  for (std::string const& arg : cmMakeRange(argBeg, argEnd)) {
    if (cmHasLiteralPrefix(arg, "--tdi=")) {
      arg_tdi = arg.substr(6);
    } else if (cmHasLiteralPrefix(arg, "--pp=")) {
      arg_pp = arg.substr(5);
    } else if (cmHasLiteralPrefix(arg, "--dep=")) {
      arg_dep = arg.substr(6);
    } else if (cmHasLiteralPrefix(arg, "--obj=")) {
      arg_obj = arg.substr(6);
    } else if (cmHasLiteralPrefix(arg, "--ddi=")) {
      arg_ddi = arg.substr(6);
    } else {
      cmSystemTools::Error("-E cmake_ninja_depends unknown argument: ",
                           arg.c_str());
      return 1;
    }
  }
  if (arg_tdi.empty()) {
    cmSystemTools::Error("-E cmake_ninja_depends requires value for --tdi=");
    return 1;
  }
  if (arg_pp.empty()) {
    cmSystemTools::Error("-E cmake_ninja_depends requires value for --pp=");
    return 1;
  }
  if (arg_dep.empty()) {
    cmSystemTools::Error("-E cmake_ninja_depends requires value for --dep=");
    return 1;
  }
  if (arg_obj.empty()) {
    cmSystemTools::Error("-E cmake_ninja_depends requires value for --obj=");
    return 1;
  }
  if (arg_ddi.empty()) {
    cmSystemTools::Error("-E cmake_ninja_depends requires value for --ddi=");
    return 1;
  }

  std::vector<std::string> includes;
  {
    Json::Value tdio;
    Json::Value const& tdi = tdio;
    {
      cmsys::ifstream tdif(arg_tdi.c_str(), std::ios::in | std::ios::binary);
      Json::Reader reader;
      if (!reader.parse(tdif, tdio, false)) {
        cmSystemTools::Error("-E cmake_ninja_depends failed to parse ",
                             arg_tdi.c_str(),
                             reader.getFormattedErrorMessages().c_str());
        return 1;
      }
    }

    Json::Value const& tdi_include_dirs = tdi["include-dirs"];
    if (tdi_include_dirs.isArray()) {
      for (auto const& tdi_include_dir : tdi_include_dirs) {
        includes.push_back(tdi_include_dir.asString());
      }
    }
  }

  cmFortranSourceInfo info;
  std::set<std::string> defines;
  cmFortranParser parser(includes, defines, info);
  if (!cmFortranParser_FilePush(&parser, arg_pp.c_str())) {
    cmSystemTools::Error("-E cmake_ninja_depends failed to open ",
                         arg_pp.c_str());
    return 1;
  }
  if (cmFortran_yyparse(parser.Scanner) != 0) {
    // Failed to parse the file.
    return 1;
  }

  {
    cmGeneratedFileStream depfile(arg_dep);
    depfile << cmSystemTools::ConvertToUnixOutputPath(arg_pp) << ":";
    for (std::string const& include : info.Includes) {
      depfile << " \\\n " << cmSystemTools::ConvertToUnixOutputPath(include);
    }
    depfile << "\n";
  }

  Json::Value ddi(Json::objectValue);
  ddi["object"] = arg_obj;

  Json::Value& ddi_provides = ddi["provides"] = Json::arrayValue;
  for (std::string const& provide : info.Provides) {
    ddi_provides.append(provide);
  }
  Json::Value& ddi_requires = ddi["requires"] = Json::arrayValue;
  for (std::string const& r : info.Requires) {
    // Require modules not provided in the same source.
    if (!info.Provides.count(r)) {
      ddi_requires.append(r);
    }
  }

  cmGeneratedFileStream ddif(arg_ddi);
  ddif << ddi;
  if (!ddif) {
    cmSystemTools::Error("-E cmake_ninja_depends failed to write ",
                         arg_ddi.c_str());
    return 1;
  }
  return 0;
}

struct cmFortranObjectInfo
{
  std::string Object;
  std::vector<std::string> Provides;
  std::vector<std::string> Requires;
};

bool cmGlobalNinjaGenerator::WriteDyndepFile(
  std::string const& dir_top_src, std::string const& dir_top_bld,
  std::string const& dir_cur_src, std::string const& dir_cur_bld,
  std::string const& arg_dd, std::vector<std::string> const& arg_ddis,
  std::string const& module_dir,
  std::vector<std::string> const& linked_target_dirs)
{
  // Setup path conversions.
  {
    cmStateSnapshot snapshot = this->GetCMakeInstance()->GetCurrentSnapshot();
    snapshot.GetDirectory().SetCurrentSource(dir_cur_src);
    snapshot.GetDirectory().SetCurrentBinary(dir_cur_bld);
    snapshot.GetDirectory().SetRelativePathTopSource(dir_top_src.c_str());
    snapshot.GetDirectory().SetRelativePathTopBinary(dir_top_bld.c_str());
    auto mfd = cm::make_unique<cmMakefile>(this, snapshot);
    std::unique_ptr<cmLocalNinjaGenerator> lgd(
      static_cast<cmLocalNinjaGenerator*>(
        this->CreateLocalGenerator(mfd.get())));
    this->Makefiles.push_back(mfd.release());
    this->LocalGenerators.push_back(lgd.release());
  }

  std::vector<cmFortranObjectInfo> objects;
  for (std::string const& arg_ddi : arg_ddis) {
    // Load the ddi file and compute the module file paths it provides.
    Json::Value ddio;
    Json::Value const& ddi = ddio;
    cmsys::ifstream ddif(arg_ddi.c_str(), std::ios::in | std::ios::binary);
    Json::Reader reader;
    if (!reader.parse(ddif, ddio, false)) {
      cmSystemTools::Error("-E cmake_ninja_dyndep failed to parse ",
                           arg_ddi.c_str(),
                           reader.getFormattedErrorMessages().c_str());
      return false;
    }

    cmFortranObjectInfo info;
    info.Object = ddi["object"].asString();
    Json::Value const& ddi_provides = ddi["provides"];
    if (ddi_provides.isArray()) {
      for (auto const& ddi_provide : ddi_provides) {
        info.Provides.push_back(ddi_provide.asString());
      }
    }
    Json::Value const& ddi_requires = ddi["requires"];
    if (ddi_requires.isArray()) {
      for (auto const& ddi_require : ddi_requires) {
        info.Requires.push_back(ddi_require.asString());
      }
    }
    objects.push_back(std::move(info));
  }

  // Map from module name to module file path, if known.
  std::map<std::string, std::string> mod_files;

  // Populate the module map with those provided by linked targets first.
  for (std::string const& linked_target_dir : linked_target_dirs) {
    std::string const ltmn = linked_target_dir + "/FortranModules.json";
    Json::Value ltm;
    cmsys::ifstream ltmf(ltmn.c_str(), std::ios::in | std::ios::binary);
    Json::Reader reader;
    if (ltmf && !reader.parse(ltmf, ltm, false)) {
      cmSystemTools::Error("-E cmake_ninja_dyndep failed to parse ",
                           linked_target_dir.c_str(),
                           reader.getFormattedErrorMessages().c_str());
      return false;
    }
    if (ltm.isObject()) {
      for (Json::Value::iterator i = ltm.begin(); i != ltm.end(); ++i) {
        mod_files[i.key().asString()] = i->asString();
      }
    }
  }

  // Extend the module map with those provided by this target.
  // We do this after loading the modules provided by linked targets
  // in case we have one of the same name that must be preferred.
  Json::Value tm = Json::objectValue;
  for (cmFortranObjectInfo const& object : objects) {
    for (std::string const& p : object.Provides) {
      std::string const mod = module_dir + p;
      mod_files[p] = mod;
      tm[p] = mod;
    }
  }

  cmGeneratedFileStream ddf(arg_dd);
  ddf << "ninja_dyndep_version = 1.0\n";

  for (cmFortranObjectInfo const& object : objects) {
    std::string const ddComment;
    std::string const ddRule = "dyndep";
    cmNinjaDeps ddOutputs;
    cmNinjaDeps ddImplicitOuts;
    cmNinjaDeps ddExplicitDeps;
    cmNinjaDeps ddImplicitDeps;
    cmNinjaDeps ddOrderOnlyDeps;
    cmNinjaVars ddVars;

    ddOutputs.push_back(object.Object);
    for (std::string const& p : object.Provides) {
      ddImplicitOuts.push_back(this->ConvertToNinjaPath(mod_files[p]));
    }
    for (std::string const& r : object.Requires) {
      std::map<std::string, std::string>::iterator m = mod_files.find(r);
      if (m != mod_files.end()) {
        ddImplicitDeps.push_back(this->ConvertToNinjaPath(m->second));
      }
    }
    if (!object.Provides.empty()) {
      ddVars["restat"] = "1";
    }

    this->WriteBuild(ddf, ddComment, ddRule, ddOutputs, ddImplicitOuts,
                     ddExplicitDeps, ddImplicitDeps, ddOrderOnlyDeps, ddVars);
  }

  // Store the map of modules provided by this target in a file for
  // use by dependents that reference this target in linked-target-dirs.
  std::string const target_mods_file =
    cmSystemTools::GetFilenamePath(arg_dd) + "/FortranModules.json";
  cmGeneratedFileStream tmf(target_mods_file);
  tmf << tm;

  return true;
}

int cmcmd_cmake_ninja_dyndep(std::vector<std::string>::const_iterator argBeg,
                             std::vector<std::string>::const_iterator argEnd)
{
  std::vector<std::string> arg_full =
    cmSystemTools::HandleResponseFile(argBeg, argEnd);

  std::string arg_dd;
  std::string arg_tdi;
  std::vector<std::string> arg_ddis;
  for (std::string const& arg : arg_full) {
    if (cmHasLiteralPrefix(arg, "--tdi=")) {
      arg_tdi = arg.substr(6);
    } else if (cmHasLiteralPrefix(arg, "--dd=")) {
      arg_dd = arg.substr(5);
    } else if (!cmHasLiteralPrefix(arg, "--") &&
               cmHasLiteralSuffix(arg, ".ddi")) {
      arg_ddis.push_back(arg);
    } else {
      cmSystemTools::Error("-E cmake_ninja_dyndep unknown argument: ",
                           arg.c_str());
      return 1;
    }
  }
  if (arg_tdi.empty()) {
    cmSystemTools::Error("-E cmake_ninja_dyndep requires value for --tdi=");
    return 1;
  }
  if (arg_dd.empty()) {
    cmSystemTools::Error("-E cmake_ninja_dyndep requires value for --dd=");
    return 1;
  }

  Json::Value tdio;
  Json::Value const& tdi = tdio;
  {
    cmsys::ifstream tdif(arg_tdi.c_str(), std::ios::in | std::ios::binary);
    Json::Reader reader;
    if (!reader.parse(tdif, tdio, false)) {
      cmSystemTools::Error("-E cmake_ninja_dyndep failed to parse ",
                           arg_tdi.c_str(),
                           reader.getFormattedErrorMessages().c_str());
      return 1;
    }
  }

  std::string const dir_cur_bld = tdi["dir-cur-bld"].asString();
  std::string const dir_cur_src = tdi["dir-cur-src"].asString();
  std::string const dir_top_bld = tdi["dir-top-bld"].asString();
  std::string const dir_top_src = tdi["dir-top-src"].asString();
  std::string module_dir = tdi["module-dir"].asString();
  if (!module_dir.empty()) {
    module_dir += "/";
  }
  std::vector<std::string> linked_target_dirs;
  Json::Value const& tdi_linked_target_dirs = tdi["linked-target-dirs"];
  if (tdi_linked_target_dirs.isArray()) {
    for (auto const& tdi_linked_target_dir : tdi_linked_target_dirs) {
      linked_target_dirs.push_back(tdi_linked_target_dir.asString());
    }
  }

  cmake cm(cmake::RoleInternal, cmState::Unknown);
  cm.SetHomeDirectory(dir_top_src);
  cm.SetHomeOutputDirectory(dir_top_bld);
  std::unique_ptr<cmGlobalNinjaGenerator> ggd(
    static_cast<cmGlobalNinjaGenerator*>(cm.CreateGlobalGenerator("Ninja")));
  if (!ggd ||
      !ggd->WriteDyndepFile(dir_top_src, dir_top_bld, dir_cur_src, dir_cur_bld,
                            arg_dd, arg_ddis, module_dir,
                            linked_target_dirs)) {
    return 1;
  }
  return 0;
}