-
-
Notifications
You must be signed in to change notification settings - Fork 1.5k
/
nix-env.cc
1498 lines (1226 loc) · 51.3 KB
/
nix-env.cc
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
#include "attr-path.hh"
#include "common-eval-args.hh"
#include "derivations.hh"
#include "eval.hh"
#include "get-drvs.hh"
#include "globals.hh"
#include "names.hh"
#include "profiles.hh"
#include "path-with-outputs.hh"
#include "shared.hh"
#include "store-api.hh"
#include "local-fs-store.hh"
#include "user-env.hh"
#include "util.hh"
#include "json.hh"
#include "value-to-json.hh"
#include "xml-writer.hh"
#include "legacy.hh"
#include <cerrno>
#include <ctime>
#include <algorithm>
#include <iostream>
#include <sstream>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
using namespace nix;
using std::cout;
typedef enum {
srcNixExprDrvs,
srcNixExprs,
srcStorePaths,
srcProfile,
srcAttrPath,
srcUnknown
} InstallSourceType;
struct InstallSourceInfo
{
InstallSourceType type;
Path nixExprPath; /* for srcNixExprDrvs, srcNixExprs */
Path profile; /* for srcProfile */
std::string systemFilter; /* for srcNixExprDrvs */
Bindings * autoArgs;
};
struct Globals
{
InstallSourceInfo instSource;
Path profile;
std::shared_ptr<EvalState> state;
bool dryRun;
bool preserveInstalled;
bool removeAll;
std::string forceName;
bool prebuiltOnly;
};
typedef void (* Operation) (Globals & globals,
Strings opFlags, Strings opArgs);
static std::string needArg(Strings::iterator & i,
Strings & args, const std::string & arg)
{
if (i == args.end()) throw UsageError("'%1%' requires an argument", arg);
return *i++;
}
static bool parseInstallSourceOptions(Globals & globals,
Strings::iterator & i, Strings & args, const std::string & arg)
{
if (arg == "--from-expression" || arg == "-E")
globals.instSource.type = srcNixExprs;
else if (arg == "--from-profile") {
globals.instSource.type = srcProfile;
globals.instSource.profile = needArg(i, args, arg);
}
else if (arg == "--attr" || arg == "-A")
globals.instSource.type = srcAttrPath;
else return false;
return true;
}
static bool isNixExpr(const Path & path, struct stat & st)
{
return S_ISREG(st.st_mode) || (S_ISDIR(st.st_mode) && pathExists(path + "/default.nix"));
}
static constexpr size_t maxAttrs = 1024;
static void getAllExprs(EvalState & state,
const Path & path, StringSet & seen, BindingsBuilder & attrs)
{
StringSet namesSorted;
for (auto & i : readDirectory(path)) namesSorted.insert(i.name);
for (auto & i : namesSorted) {
/* Ignore the manifest.nix used by profiles. This is
necessary to prevent it from showing up in channels (which
are implemented using profiles). */
if (i == "manifest.nix") continue;
Path path2 = path + "/" + i;
struct stat st;
if (stat(path2.c_str(), &st) == -1)
continue; // ignore dangling symlinks in ~/.nix-defexpr
if (isNixExpr(path2, st) && (!S_ISREG(st.st_mode) || hasSuffix(path2, ".nix"))) {
/* Strip off the `.nix' filename suffix (if applicable),
otherwise the attribute cannot be selected with the
`-A' option. Useful if you want to stick a Nix
expression directly in ~/.nix-defexpr. */
std::string attrName = i;
if (hasSuffix(attrName, ".nix"))
attrName = std::string(attrName, 0, attrName.size() - 4);
if (!seen.insert(attrName).second) {
std::string suggestionMessage = "";
if (path2.find("channels") != std::string::npos && path.find("channels") != std::string::npos) {
suggestionMessage = fmt("\nsuggestion: remove '%s' from either the root channels or the user channels", attrName);
}
printError("warning: name collision in input Nix expressions, skipping '%1%'"
"%2%", path2, suggestionMessage);
continue;
}
/* Load the expression on demand. */
auto vArg = state.allocValue();
vArg->mkString(path2);
if (seen.size() == maxAttrs)
throw Error("too many Nix expressions in directory '%1%'", path);
attrs.alloc(attrName).mkApp(&state.getBuiltin("import"), vArg);
}
else if (S_ISDIR(st.st_mode))
/* `path2' is a directory (with no default.nix in it);
recurse into it. */
getAllExprs(state, path2, seen, attrs);
}
}
static void loadSourceExpr(EvalState & state, const Path & path, Value & v)
{
struct stat st;
if (stat(path.c_str(), &st) == -1)
throw SysError("getting information about '%1%'", path);
if (isNixExpr(path, st))
state.evalFile(path, v);
/* The path is a directory. Put the Nix expressions in the
directory in a set, with the file name of each expression as
the attribute name. Recurse into subdirectories (but keep the
set flat, not nested, to make it easier for a user to have a
~/.nix-defexpr directory that includes some system-wide
directory). */
else if (S_ISDIR(st.st_mode)) {
auto attrs = state.buildBindings(maxAttrs);
attrs.alloc("_combineChannels").mkList(0);
StringSet seen;
getAllExprs(state, path, seen, attrs);
v.mkAttrs(attrs);
}
else throw Error("path '%s' is not a directory or a Nix expression", path);
}
static void loadDerivations(EvalState & state, Path nixExprPath,
std::string systemFilter, Bindings & autoArgs,
const std::string & pathPrefix, DrvInfos & elems)
{
Value vRoot;
loadSourceExpr(state, nixExprPath, vRoot);
Value & v(*findAlongAttrPath(state, pathPrefix, autoArgs, vRoot).first);
getDerivations(state, v, pathPrefix, autoArgs, elems, true);
/* Filter out all derivations not applicable to the current
system. */
for (DrvInfos::iterator i = elems.begin(), j; i != elems.end(); i = j) {
j = i; j++;
if (systemFilter != "*" && i->querySystem() != systemFilter)
elems.erase(i);
}
}
static long getPriority(EvalState & state, DrvInfo & drv)
{
return drv.queryMetaInt("priority", 0);
}
static long comparePriorities(EvalState & state, DrvInfo & drv1, DrvInfo & drv2)
{
return getPriority(state, drv2) - getPriority(state, drv1);
}
// FIXME: this function is rather slow since it checks a single path
// at a time.
static bool isPrebuilt(EvalState & state, DrvInfo & elem)
{
auto path = elem.queryOutPath();
if (state.store->isValidPath(path)) return true;
return state.store->querySubstitutablePaths({path}).count(path);
}
static void checkSelectorUse(DrvNames & selectors)
{
/* Check that all selectors have been used. */
for (auto & i : selectors)
if (i.hits == 0 && i.fullName != "*")
throw Error("selector '%1%' matches no derivations", i.fullName);
}
namespace {
std::set<std::string> searchByPrefix(const DrvInfos & allElems, std::string_view prefix) {
constexpr std::size_t maxResults = 3;
std::set<std::string> result;
for (const auto & drvInfo : allElems) {
const auto drvName = DrvName { drvInfo.queryName() };
if (hasPrefix(drvName.name, prefix)) {
result.emplace(drvName.name);
if (result.size() >= maxResults) {
break;
}
}
}
return result;
}
struct Match
{
DrvInfo drvInfo;
std::size_t index;
Match(DrvInfo drvInfo_, std::size_t index_)
: drvInfo{std::move(drvInfo_)}
, index{index_}
{}
};
/* If a selector matches multiple derivations
with the same name, pick the one matching the current
system. If there are still multiple derivations, pick the
one with the highest priority. If there are still multiple
derivations, pick the one with the highest version.
Finally, if there are still multiple derivations,
arbitrarily pick the first one. */
std::vector<Match> pickNewestOnly(EvalState & state, std::vector<Match> matches) {
/* Map from package names to derivations. */
std::map<std::string, Match> newest;
StringSet multiple;
for (auto & match : matches) {
auto & oneDrv = match.drvInfo;
const auto drvName = DrvName { oneDrv.queryName() };
long comparison = 1;
const auto itOther = newest.find(drvName.name);
if (itOther != newest.end()) {
auto & newestDrv = itOther->second.drvInfo;
comparison =
oneDrv.querySystem() == newestDrv.querySystem() ? 0 :
oneDrv.querySystem() == settings.thisSystem ? 1 :
newestDrv.querySystem() == settings.thisSystem ? -1 : 0;
if (comparison == 0)
comparison = comparePriorities(state, oneDrv, newestDrv);
if (comparison == 0)
comparison = compareVersions(drvName.version, DrvName { newestDrv.queryName() }.version);
}
if (comparison > 0) {
newest.erase(drvName.name);
newest.emplace(drvName.name, match);
multiple.erase(drvName.fullName);
} else if (comparison == 0) {
multiple.insert(drvName.fullName);
}
}
matches.clear();
for (auto & [name, match] : newest) {
if (multiple.find(name) != multiple.end())
warn(
"there are multiple derivations named '%1%'; using the first one",
name);
matches.push_back(match);
}
return matches;
}
} // end namespace
static DrvInfos filterBySelector(EvalState & state, const DrvInfos & allElems,
const Strings & args, bool newestOnly)
{
DrvNames selectors = drvNamesFromArgs(args);
if (selectors.empty())
selectors.emplace_back("*");
DrvInfos elems;
std::set<std::size_t> done;
for (auto & selector : selectors) {
std::vector<Match> matches;
for (const auto & [index, drvInfo] : enumerate(allElems)) {
const auto drvName = DrvName { drvInfo.queryName() };
if (selector.matches(drvName)) {
++selector.hits;
matches.emplace_back(drvInfo, index);
}
}
if (newestOnly) {
matches = pickNewestOnly(state, std::move(matches));
}
/* Insert only those elements in the final list that we
haven't inserted before. */
for (auto & match : matches)
if (done.insert(match.index).second)
elems.push_back(match.drvInfo);
if (selector.hits == 0 && selector.fullName != "*") {
const auto prefixHits = searchByPrefix(allElems, selector.name);
if (prefixHits.empty()) {
throw Error("selector '%1%' matches no derivations", selector.fullName);
} else {
std::string suggestionMessage = ", maybe you meant:";
for (const auto & drvName : prefixHits) {
suggestionMessage += fmt("\n%s", drvName);
}
throw Error("selector '%1%' matches no derivations" + suggestionMessage, selector.fullName);
}
}
}
return elems;
}
static bool isPath(std::string_view s)
{
return s.find('/') != std::string_view::npos;
}
static void queryInstSources(EvalState & state,
InstallSourceInfo & instSource, const Strings & args,
DrvInfos & elems, bool newestOnly)
{
InstallSourceType type = instSource.type;
if (type == srcUnknown && args.size() > 0 && isPath(args.front()))
type = srcStorePaths;
switch (type) {
/* Get the available user environment elements from the
derivations specified in a Nix expression, including only
those with names matching any of the names in `args'. */
case srcUnknown:
case srcNixExprDrvs: {
/* Load the derivations from the (default or specified)
Nix expression. */
DrvInfos allElems;
loadDerivations(state, instSource.nixExprPath,
instSource.systemFilter, *instSource.autoArgs, "", allElems);
elems = filterBySelector(state, allElems, args, newestOnly);
break;
}
/* Get the available user environment elements from the Nix
expressions specified on the command line; these should be
functions that take the default Nix expression file as
argument, e.g., if the file is `./foo.nix', then the
argument `x: x.bar' is equivalent to `(x: x.bar)
(import ./foo.nix)' = `(import ./foo.nix).bar'. */
case srcNixExprs: {
Value vArg;
loadSourceExpr(state, instSource.nixExprPath, vArg);
for (auto & i : args) {
Expr * eFun = state.parseExprFromString(i, absPath("."));
Value vFun, vTmp;
state.eval(eFun, vFun);
vTmp.mkApp(&vFun, &vArg);
getDerivations(state, vTmp, "", *instSource.autoArgs, elems, true);
}
break;
}
/* The available user environment elements are specified as a
list of store paths (which may or may not be
derivations). */
case srcStorePaths: {
for (auto & i : args) {
auto path = state.store->followLinksToStorePath(i);
std::string name(path.name());
DrvInfo elem(state, "", nullptr);
elem.setName(name);
if (path.isDerivation()) {
elem.setDrvPath(path);
auto outputs = state.store->queryDerivationOutputMap(path);
elem.setOutPath(outputs.at("out"));
if (name.size() >= drvExtension.size() &&
std::string(name, name.size() - drvExtension.size()) == drvExtension)
name = name.substr(0, name.size() - drvExtension.size());
}
else
elem.setOutPath(path);
elems.push_back(elem);
}
break;
}
/* Get the available user environment elements from another
user environment. These are then filtered as in the
`srcNixExprDrvs' case. */
case srcProfile: {
elems = filterBySelector(state,
queryInstalled(state, instSource.profile),
args, newestOnly);
break;
}
case srcAttrPath: {
Value vRoot;
loadSourceExpr(state, instSource.nixExprPath, vRoot);
for (auto & i : args) {
Value & v(*findAlongAttrPath(state, i, *instSource.autoArgs, vRoot).first);
getDerivations(state, v, "", *instSource.autoArgs, elems, true);
}
break;
}
}
}
static void printMissing(EvalState & state, DrvInfos & elems)
{
std::vector<DerivedPath> targets;
for (auto & i : elems)
if (auto drvPath = i.queryDrvPath())
targets.push_back(DerivedPath::Built{*drvPath});
else
targets.push_back(DerivedPath::Opaque{i.queryOutPath()});
printMissing(state.store, targets);
}
static bool keep(DrvInfo & drv)
{
return drv.queryMetaBool("keep", false);
}
static void installDerivations(Globals & globals,
const Strings & args, const Path & profile)
{
debug(format("installing derivations"));
/* Get the set of user environment elements to be installed. */
DrvInfos newElems, newElemsTmp;
queryInstSources(*globals.state, globals.instSource, args, newElemsTmp, true);
/* If --prebuilt-only is given, filter out source-only packages. */
for (auto & i : newElemsTmp)
if (!globals.prebuiltOnly || isPrebuilt(*globals.state, i))
newElems.push_back(i);
StringSet newNames;
for (auto & i : newElems) {
/* `forceName' is a hack to get package names right in some
one-click installs, namely those where the name used in the
path is not the one we want (e.g., `java-front' versus
`java-front-0.9pre15899'). */
if (globals.forceName != "")
i.setName(globals.forceName);
newNames.insert(DrvName(i.queryName()).name);
}
while (true) {
auto lockToken = optimisticLockProfile(profile);
DrvInfos allElems(newElems);
/* Add in the already installed derivations, unless they have
the same name as a to-be-installed element. */
if (!globals.removeAll) {
DrvInfos installedElems = queryInstalled(*globals.state, profile);
for (auto & i : installedElems) {
DrvName drvName(i.queryName());
if (!globals.preserveInstalled &&
newNames.find(drvName.name) != newNames.end() &&
!keep(i))
printInfo("replacing old '%s'", i.queryName());
else
allElems.push_back(i);
}
for (auto & i : newElems)
printInfo("installing '%s'", i.queryName());
}
printMissing(*globals.state, newElems);
if (globals.dryRun) return;
if (createUserEnv(*globals.state, allElems,
profile, settings.envKeepDerivations, lockToken)) break;
}
}
static void opInstall(Globals & globals, Strings opFlags, Strings opArgs)
{
for (Strings::iterator i = opFlags.begin(); i != opFlags.end(); ) {
auto arg = *i++;
if (parseInstallSourceOptions(globals, i, opFlags, arg)) ;
else if (arg == "--preserve-installed" || arg == "-P")
globals.preserveInstalled = true;
else if (arg == "--remove-all" || arg == "-r")
globals.removeAll = true;
else throw UsageError("unknown flag '%1%'", arg);
}
installDerivations(globals, opArgs, globals.profile);
}
typedef enum { utLt, utLeq, utEq, utAlways } UpgradeType;
static void upgradeDerivations(Globals & globals,
const Strings & args, UpgradeType upgradeType)
{
debug(format("upgrading derivations"));
/* Upgrade works as follows: we take all currently installed
derivations, and for any derivation matching any selector, look
for a derivation in the input Nix expression that has the same
name and a higher version number. */
while (true) {
auto lockToken = optimisticLockProfile(globals.profile);
DrvInfos installedElems = queryInstalled(*globals.state, globals.profile);
/* Fetch all derivations from the input file. */
DrvInfos availElems;
queryInstSources(*globals.state, globals.instSource, args, availElems, false);
/* Go through all installed derivations. */
DrvInfos newElems;
for (auto & i : installedElems) {
DrvName drvName(i.queryName());
try {
if (keep(i)) {
newElems.push_back(i);
continue;
}
/* Find the derivation in the input Nix expression
with the same name that satisfies the version
constraints specified by upgradeType. If there are
multiple matches, take the one with the highest
priority. If there are still multiple matches,
take the one with the highest version.
Do not upgrade if it would decrease the priority. */
DrvInfos::iterator bestElem = availElems.end();
std::string bestVersion;
for (auto j = availElems.begin(); j != availElems.end(); ++j) {
if (comparePriorities(*globals.state, i, *j) > 0)
continue;
DrvName newName(j->queryName());
if (newName.name == drvName.name) {
int d = compareVersions(drvName.version, newName.version);
if ((upgradeType == utLt && d < 0) ||
(upgradeType == utLeq && d <= 0) ||
(upgradeType == utEq && d == 0) ||
upgradeType == utAlways)
{
long d2 = -1;
if (bestElem != availElems.end()) {
d2 = comparePriorities(*globals.state, *bestElem, *j);
if (d2 == 0) d2 = compareVersions(bestVersion, newName.version);
}
if (d2 < 0 && (!globals.prebuiltOnly || isPrebuilt(*globals.state, *j))) {
bestElem = j;
bestVersion = newName.version;
}
}
}
}
if (bestElem != availElems.end() &&
i.queryOutPath() !=
bestElem->queryOutPath())
{
const char * action = compareVersions(drvName.version, bestVersion) <= 0
? "upgrading" : "downgrading";
printInfo("%1% '%2%' to '%3%'",
action, i.queryName(), bestElem->queryName());
newElems.push_back(*bestElem);
} else newElems.push_back(i);
} catch (Error & e) {
e.addTrace(std::nullopt, "while trying to find an upgrade for '%s'", i.queryName());
throw;
}
}
printMissing(*globals.state, newElems);
if (globals.dryRun) return;
if (createUserEnv(*globals.state, newElems,
globals.profile, settings.envKeepDerivations, lockToken)) break;
}
}
static void opUpgrade(Globals & globals, Strings opFlags, Strings opArgs)
{
UpgradeType upgradeType = utLt;
for (Strings::iterator i = opFlags.begin(); i != opFlags.end(); ) {
std::string arg = *i++;
if (parseInstallSourceOptions(globals, i, opFlags, arg)) ;
else if (arg == "--lt") upgradeType = utLt;
else if (arg == "--leq") upgradeType = utLeq;
else if (arg == "--eq") upgradeType = utEq;
else if (arg == "--always") upgradeType = utAlways;
else throw UsageError("unknown flag '%1%'", arg);
}
upgradeDerivations(globals, opArgs, upgradeType);
}
static void setMetaFlag(EvalState & state, DrvInfo & drv,
const std::string & name, const std::string & value)
{
auto v = state.allocValue();
v->mkString(value);
drv.setMeta(name, v);
}
static void opSetFlag(Globals & globals, Strings opFlags, Strings opArgs)
{
if (opFlags.size() > 0)
throw UsageError("unknown flag '%1%'", opFlags.front());
if (opArgs.size() < 2)
throw UsageError("not enough arguments to '--set-flag'");
Strings::iterator arg = opArgs.begin();
std::string flagName = *arg++;
std::string flagValue = *arg++;
DrvNames selectors = drvNamesFromArgs(Strings(arg, opArgs.end()));
while (true) {
std::string lockToken = optimisticLockProfile(globals.profile);
DrvInfos installedElems = queryInstalled(*globals.state, globals.profile);
/* Update all matching derivations. */
for (auto & i : installedElems) {
DrvName drvName(i.queryName());
for (auto & j : selectors)
if (j.matches(drvName)) {
printInfo("setting flag on '%1%'", i.queryName());
j.hits++;
setMetaFlag(*globals.state, i, flagName, flagValue);
break;
}
}
checkSelectorUse(selectors);
/* Write the new user environment. */
if (createUserEnv(*globals.state, installedElems,
globals.profile, settings.envKeepDerivations, lockToken)) break;
}
}
static void opSet(Globals & globals, Strings opFlags, Strings opArgs)
{
auto store2 = globals.state->store.dynamic_pointer_cast<LocalFSStore>();
if (!store2) throw Error("--set is not supported for this Nix store");
for (Strings::iterator i = opFlags.begin(); i != opFlags.end(); ) {
std::string arg = *i++;
if (parseInstallSourceOptions(globals, i, opFlags, arg)) ;
else throw UsageError("unknown flag '%1%'", arg);
}
DrvInfos elems;
queryInstSources(*globals.state, globals.instSource, opArgs, elems, true);
if (elems.size() != 1)
throw Error("--set requires exactly one derivation");
DrvInfo & drv(elems.front());
if (globals.forceName != "")
drv.setName(globals.forceName);
auto drvPath = drv.queryDrvPath();
std::vector<DerivedPath> paths {
drvPath
? (DerivedPath) (DerivedPath::Built { *drvPath })
: (DerivedPath) (DerivedPath::Opaque { drv.queryOutPath() }),
};
printMissing(globals.state->store, paths);
if (globals.dryRun) return;
globals.state->store->buildPaths(paths, globals.state->repair ? bmRepair : bmNormal);
debug(format("switching to new user environment"));
Path generation = createGeneration(
ref<LocalFSStore>(store2),
globals.profile,
drv.queryOutPath());
switchLink(globals.profile, generation);
}
static void uninstallDerivations(Globals & globals, Strings & selectors,
Path & profile)
{
while (true) {
auto lockToken = optimisticLockProfile(profile);
DrvInfos workingElems = queryInstalled(*globals.state, profile);
for (auto & selector : selectors) {
DrvInfos::iterator split = workingElems.begin();
if (isPath(selector)) {
StorePath selectorStorePath = globals.state->store->followLinksToStorePath(selector);
split = std::partition(
workingElems.begin(), workingElems.end(),
[&selectorStorePath, globals](auto &elem) {
return selectorStorePath != elem.queryOutPath();
}
);
} else {
DrvName selectorName(selector);
split = std::partition(
workingElems.begin(), workingElems.end(),
[&selectorName](auto &elem){
DrvName elemName(elem.queryName());
return !selectorName.matches(elemName);
}
);
}
if (split == workingElems.end())
warn("selector '%s' matched no installed derivations", selector);
for (auto removedElem = split; removedElem != workingElems.end(); removedElem++) {
printInfo("uninstalling '%s'", removedElem->queryName());
}
workingElems.erase(split, workingElems.end());
}
if (globals.dryRun) return;
if (createUserEnv(*globals.state, workingElems,
profile, settings.envKeepDerivations, lockToken)) break;
}
}
static void opUninstall(Globals & globals, Strings opFlags, Strings opArgs)
{
if (opFlags.size() > 0)
throw UsageError("unknown flag '%1%'", opFlags.front());
uninstallDerivations(globals, opArgs, globals.profile);
}
static bool cmpChars(char a, char b)
{
return toupper(a) < toupper(b);
}
static bool cmpElemByName(const DrvInfo & a, const DrvInfo & b)
{
auto a_name = a.queryName();
auto b_name = b.queryName();
return lexicographical_compare(
a_name.begin(), a_name.end(),
b_name.begin(), b_name.end(), cmpChars);
}
typedef std::list<Strings> Table;
void printTable(Table & table)
{
auto nrColumns = table.size() > 0 ? table.front().size() : 0;
std::vector<size_t> widths;
widths.resize(nrColumns);
for (auto & i : table) {
assert(i.size() == nrColumns);
Strings::iterator j;
size_t column;
for (j = i.begin(), column = 0; j != i.end(); ++j, ++column)
if (j->size() > widths[column]) widths[column] = j->size();
}
for (auto & i : table) {
Strings::iterator j;
size_t column;
for (j = i.begin(), column = 0; j != i.end(); ++j, ++column) {
std::string s = *j;
replace(s.begin(), s.end(), '\n', ' ');
cout << s;
if (column < nrColumns - 1)
cout << std::string(widths[column] - s.size() + 2, ' ');
}
cout << std::endl;
}
}
/* This function compares the version of an element against the
versions in the given set of elements. `cvLess' means that only
lower versions are in the set, `cvEqual' means that at most an
equal version is in the set, and `cvGreater' means that there is at
least one element with a higher version in the set. `cvUnavail'
means that there are no elements with the same name in the set. */
typedef enum { cvLess, cvEqual, cvGreater, cvUnavail } VersionDiff;
static VersionDiff compareVersionAgainstSet(
const DrvInfo & elem, const DrvInfos & elems, std::string & version)
{
DrvName name(elem.queryName());
VersionDiff diff = cvUnavail;
version = "?";
for (auto & i : elems) {
DrvName name2(i.queryName());
if (name.name == name2.name) {
int d = compareVersions(name.version, name2.version);
if (d < 0) {
diff = cvGreater;
version = name2.version;
}
else if (diff != cvGreater && d == 0) {
diff = cvEqual;
version = name2.version;
}
else if (diff != cvGreater && diff != cvEqual && d > 0) {
diff = cvLess;
if (version == "" || compareVersions(version, name2.version) < 0)
version = name2.version;
}
}
}
return diff;
}
static void queryJSON(Globals & globals, std::vector<DrvInfo> & elems, bool printOutPath, bool printMeta)
{
JSONObject topObj(cout, true);
for (auto & i : elems) {
try {
if (i.hasFailed()) continue;
JSONObject pkgObj = topObj.object(i.attrPath);
auto drvName = DrvName(i.queryName());
pkgObj.attr("name", drvName.fullName);
pkgObj.attr("pname", drvName.name);
pkgObj.attr("version", drvName.version);
pkgObj.attr("system", i.querySystem());
pkgObj.attr("outputName", i.queryOutputName());
{
DrvInfo::Outputs outputs = i.queryOutputs(printOutPath);
JSONObject outputObj = pkgObj.object("outputs");
for (auto & j : outputs) {
if (j.second)
outputObj.attr(j.first, globals.state->store->printStorePath(*j.second));
else
outputObj.attr(j.first, nullptr);
}
}
if (printMeta) {
JSONObject metaObj = pkgObj.object("meta");
StringSet metaNames = i.queryMetaNames();
for (auto & j : metaNames) {
auto placeholder = metaObj.placeholder(j);
Value * v = i.queryMeta(j);
if (!v) {
printError("derivation '%s' has invalid meta attribute '%s'", i.queryName(), j);
placeholder.write(nullptr);
} else {
PathSet context;
printValueAsJSON(*globals.state, true, *v, noPos, placeholder, context);
}
}
}
} catch (AssertionError & e) {
printMsg(lvlTalkative, "skipping derivation named '%1%' which gives an assertion failure", i.queryName());
} catch (Error & e) {
e.addTrace(std::nullopt, "while querying the derivation named '%1%'", i.queryName());
throw;
}
}
}
static void opQuery(Globals & globals, Strings opFlags, Strings opArgs)
{
auto & store { *globals.state->store };
Strings remaining;
std::string attrPath;
bool printStatus = false;
bool printName = true;
bool printAttrPath = false;
bool printSystem = false;
bool printDrvPath = false;
bool printOutPath = false;
bool printDescription = false;
bool printMeta = false;
bool compareVersions = false;
bool xmlOutput = false;
bool jsonOutput = false;
enum { sInstalled, sAvailable } source = sInstalled;
settings.readOnlyMode = true; /* makes evaluation a bit faster */
for (Strings::iterator i = opFlags.begin(); i != opFlags.end(); ) {
auto arg = *i++;
if (arg == "--status" || arg == "-s") printStatus = true;
else if (arg == "--no-name") printName = false;
else if (arg == "--system") printSystem = true;
else if (arg == "--description") printDescription = true;
else if (arg == "--compare-versions" || arg == "-c") compareVersions = true;
else if (arg == "--drv-path") printDrvPath = true;
else if (arg == "--out-path") printOutPath = true;
else if (arg == "--meta") printMeta = true;
else if (arg == "--installed") source = sInstalled;
else if (arg == "--available" || arg == "-a") source = sAvailable;
else if (arg == "--xml") xmlOutput = true;
else if (arg == "--json") jsonOutput = true;