1 /*
2 * Copyright (c) 2007-2008, Novell Inc.
3 *
4 * This program is licensed under the BSD license, read LICENSE.BSD
5 * for further information
6 */
7
8 /*
9 * solver.c
10 *
11 * SAT based dependency solver
12 */
13
14 #include <stdio.h>
15 #include <stdlib.h>
16 #include <unistd.h>
17 #include <string.h>
18 #include <assert.h>
19
20 #include "solver.h"
21 #include "solver_private.h"
22 #include "bitmap.h"
23 #include "pool.h"
24 #include "util.h"
25 #include "policy.h"
26 #include "poolarch.h"
27 #include "solverdebug.h"
28 #include "cplxdeps.h"
29 #include "linkedpkg.h"
30
31 #define RULES_BLOCK 63
32
33
34 /************************************************************************/
35
36 /*
37 * enable/disable learnt rules
38 *
39 * we have enabled or disabled some of our rules. We now reenable all
40 * of our learnt rules except the ones that were learnt from rules that
41 * are now disabled.
42 */
43 static void
enabledisablelearntrules(Solver * solv)44 enabledisablelearntrules(Solver *solv)
45 {
46 Pool *pool = solv->pool;
47 Rule *r;
48 Id why, *whyp;
49 int i;
50
51 POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "enabledisablelearntrules called\n");
52 for (i = solv->learntrules, r = solv->rules + i; i < solv->nrules; i++, r++)
53 {
54 whyp = solv->learnt_pool.elements + solv->learnt_why.elements[i - solv->learntrules];
55 while ((why = *whyp++) != 0)
56 {
57 assert(why > 0 && why < i);
58 if (solv->rules[why].d < 0)
59 break;
60 }
61 /* why != 0: we found a disabled rule, disable the learnt rule */
62 if (why && r->d >= 0)
63 {
64 IF_POOLDEBUG (SOLV_DEBUG_SOLUTIONS)
65 {
66 POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "disabling ");
67 solver_printruleclass(solv, SOLV_DEBUG_SOLUTIONS, r);
68 }
69 solver_disablerule(solv, r);
70 }
71 else if (!why && r->d < 0)
72 {
73 IF_POOLDEBUG (SOLV_DEBUG_SOLUTIONS)
74 {
75 POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "re-enabling ");
76 solver_printruleclass(solv, SOLV_DEBUG_SOLUTIONS, r);
77 }
78 solver_enablerule(solv, r);
79 }
80 }
81 }
82
83
84 /*
85 * make assertion rules into decisions
86 *
87 * Go through rules and add direct assertions to the decisionqueue.
88 * If we find a conflict, disable rules and add them to problem queue.
89 */
90
91 static int
makeruledecisions(Solver * solv,int disablerules)92 makeruledecisions(Solver *solv, int disablerules)
93 {
94 Pool *pool = solv->pool;
95 int i, ri, ii, ori;
96 Rule *r, *rr;
97 Id v, vv;
98 int decisionstart;
99 int record_proof = 1;
100 int oldproblemcount;
101 int havedisabled = 0;
102 int doautouninstall;
103
104 /* The system solvable is always installed first */
105 assert(solv->decisionq.count == 0);
106 queue_push(&solv->decisionq, SYSTEMSOLVABLE);
107 queue_push(&solv->decisionq_why, 0);
108 queue_push2(&solv->decisionq_reason, 0, 0);
109 solv->decisionmap[SYSTEMSOLVABLE] = 1; /* installed at level '1' */
110
111 decisionstart = solv->decisionq.count;
112 for (;;)
113 {
114 /* if we needed to re-run, back up decisions to decisionstart */
115 while (solv->decisionq.count > decisionstart)
116 {
117 v = solv->decisionq.elements[--solv->decisionq.count];
118 --solv->decisionq_why.count;
119 vv = v > 0 ? v : -v;
120 solv->decisionmap[vv] = 0;
121 }
122
123 /* note that the ruleassertions queue is ordered */
124 for (ii = 0; ii < solv->ruleassertions.count; ii++)
125 {
126 ri = solv->ruleassertions.elements[ii];
127 r = solv->rules + ri;
128
129 if (havedisabled && ri >= solv->learntrules)
130 {
131 /* just started with learnt rule assertions. If we have disabled
132 * some rules, adapt the learnt rule status */
133 enabledisablelearntrules(solv);
134 havedisabled = 0;
135 }
136
137 if (r->d < 0 || !r->p || r->w2) /* disabled, dummy or no assertion */
138 continue;
139
140 /* do weak rules in phase 2 */
141 if (ri < solv->learntrules && solv->weakrulemap.size && MAPTST(&solv->weakrulemap, ri))
142 continue;
143
144 v = r->p;
145 vv = v > 0 ? v : -v;
146
147 if (!solv->decisionmap[vv]) /* if not yet decided */
148 {
149 queue_push(&solv->decisionq, v);
150 queue_push(&solv->decisionq_why, ri);
151 solv->decisionmap[vv] = v > 0 ? 1 : -1;
152 IF_POOLDEBUG (SOLV_DEBUG_PROPAGATE)
153 {
154 Solvable *s = solv->pool->solvables + vv;
155 if (v < 0)
156 POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "conflicting %s (assertion)\n", pool_solvable2str(solv->pool, s));
157 else
158 POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "installing %s (assertion)\n", pool_solvable2str(solv->pool, s));
159 }
160 continue;
161 }
162
163 /* check against previous decision: is there a conflict? */
164 if (v > 0 && solv->decisionmap[vv] > 0) /* ok to install */
165 continue;
166 if (v < 0 && solv->decisionmap[vv] < 0) /* ok to remove */
167 continue;
168
169 /*
170 * found a conflict!
171 *
172 * The rule (r) we're currently processing says something
173 * different (v = r->p) than a previous decision (decisionmap[abs(v)])
174 * on this literal
175 */
176
177 if (ri >= solv->learntrules)
178 {
179 /* conflict with a learnt rule */
180 /* can happen when packages cannot be installed for multiple reasons. */
181 /* we disable the learnt rule in this case */
182 /* (XXX: we should really do something like analyze_unsolvable_rule here!) */
183 solver_disablerule(solv, r);
184 continue;
185 }
186
187 POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "ANALYZE UNSOLVABLE ASSERTION ----------------------\n");
188 assert(ri >= solv->pkgrules_end); /* must not have a conflict in the pkg rules! */
189
190 /*
191 * find the decision which is the "opposite" of the rule
192 */
193 for (i = 0; i < solv->decisionq.count; i++)
194 if (solv->decisionq.elements[i] == -v)
195 break;
196 assert(i < solv->decisionq.count); /* assert that we found it */
197 if (v == -SYSTEMSOLVABLE)
198 ori = 0;
199 else
200 {
201 ori = solv->decisionq_why.elements[i]; /* the conflicting rule */
202 assert(ori > 0);
203 }
204
205 /*
206 * record the problem
207 */
208 doautouninstall = 0;
209 oldproblemcount = solv->problems.count;
210 queue_push(&solv->problems, 0); /* start problem */
211 if (ori < solv->pkgrules_end)
212 {
213 /* easy: conflict with system solvable or pkg rule */
214 assert(v > 0 || v == -SYSTEMSOLVABLE);
215 IF_POOLDEBUG (SOLV_DEBUG_UNSOLVABLE)
216 {
217 if (ori)
218 POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "conflict with pkg rule, disabling rule #%d\n", ri);
219 else
220 POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "conflict with system solvable, disabling rule #%d\n", ri);
221 solver_printruleclass(solv, SOLV_DEBUG_UNSOLVABLE, solv->rules + ri);
222 if (ori)
223 solver_printruleclass(solv, SOLV_DEBUG_UNSOLVABLE, solv->rules + ori);
224 }
225 solver_recordproblem(solv, ri);
226 if (ri >= solv->featurerules && ri < solv->updaterules_end)
227 doautouninstall = 1;
228 }
229 else
230 {
231 POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "conflicting update/job assertions over literal %d\n", vv);
232 /*
233 * push all of our rules (can only be feature or job rules)
234 * asserting this literal on the problem stack
235 */
236 for (i = solv->pkgrules_end, rr = solv->rules + i; i < solv->learntrules; i++, rr++)
237 {
238 if (rr->d < 0 /* disabled */
239 || rr->w2) /* or no assertion */
240 continue;
241 if (rr->p != vv /* not affecting the literal */
242 && rr->p != -vv)
243 continue;
244 if (solv->weakrulemap.size && MAPTST(&solv->weakrulemap, i)) /* weak: silently ignore */
245 continue;
246
247 POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, " - disabling rule #%d\n", i);
248 solver_printruleclass(solv, SOLV_DEBUG_UNSOLVABLE, solv->rules + i);
249 solver_recordproblem(solv, i);
250 if (i >= solv->featurerules && i < solv->updaterules_end)
251 doautouninstall = 1;
252 }
253 }
254 queue_push(&solv->problems, 0); /* finish problem */
255
256 /* try autouninstall if requested */
257 if (doautouninstall)
258 {
259 if (solv->allowuninstall || solv->allowuninstall_all || solv->allowuninstallmap.size)
260 if (solver_autouninstall(solv, oldproblemcount) != 0)
261 {
262 solv->problems.count = oldproblemcount;
263 havedisabled = 1;
264 break; /* start over */
265 }
266 }
267
268 /* record the proof if requested */
269 if (record_proof)
270 {
271 solv->problems.elements[oldproblemcount] = solv->learnt_pool.count;
272 queue_push(&solv->learnt_pool, ri);
273 if (ori)
274 queue_push(&solv->learnt_pool, ori);
275 queue_push(&solv->learnt_pool, 0);
276 }
277
278 if (!disablerules)
279 {
280 POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "UNSOLVABLE\n");
281 return -1;
282 }
283 /* disable all problem rules */
284 solver_disableproblemset(solv, oldproblemcount);
285 havedisabled = 1;
286 break; /* start over */
287 }
288 if (ii < solv->ruleassertions.count)
289 continue;
290
291 /*
292 * phase 2: now do the weak assertions
293 */
294 if (!solv->weakrulemap.size)
295 break; /* no weak rules, no phase 2 */
296 for (ii = 0; ii < solv->ruleassertions.count; ii++)
297 {
298 ri = solv->ruleassertions.elements[ii];
299 r = solv->rules + ri;
300 if (r->d < 0 || r->w2) /* disabled or no assertion */
301 continue;
302 if (ri >= solv->learntrules || !MAPTST(&solv->weakrulemap, ri)) /* skip non-weak */
303 continue;
304 v = r->p;
305 vv = v > 0 ? v : -v;
306
307 if (!solv->decisionmap[vv]) /* if not yet decided */
308 {
309 queue_push(&solv->decisionq, v);
310 queue_push(&solv->decisionq_why, r - solv->rules);
311 solv->decisionmap[vv] = v > 0 ? 1 : -1;
312 IF_POOLDEBUG (SOLV_DEBUG_PROPAGATE)
313 {
314 Solvable *s = solv->pool->solvables + vv;
315 if (v < 0)
316 POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "conflicting %s (weak assertion)\n", pool_solvable2str(solv->pool, s));
317 else
318 POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "installing %s (weak assertion)\n", pool_solvable2str(solv->pool, s));
319 }
320 continue;
321 }
322 /* check against previous decision: is there a conflict? */
323 if (v > 0 && solv->decisionmap[vv] > 0)
324 continue;
325 if (v < 0 && solv->decisionmap[vv] < 0)
326 continue;
327
328 POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "assertion conflict, but I am weak, disabling ");
329 solver_printruleclass(solv, SOLV_DEBUG_UNSOLVABLE, r);
330 solver_fixproblem(solv, ri);
331 havedisabled = 1;
332 break; /* start over */
333 }
334 if (ii == solv->ruleassertions.count)
335 break; /* finished! */
336 }
337 return 1; /* the new level */
338 }
339
340
341 /********************************************************************/
342 /* watches */
343
344
345 /*-------------------------------------------------------------------
346 * makewatches
347 *
348 * initial setup for all watches
349 */
350
351 static void
makewatches(Solver * solv)352 makewatches(Solver *solv)
353 {
354 Rule *r;
355 int i;
356 int nsolvables = solv->pool->nsolvables;
357
358 solv_free(solv->watches);
359 /* lower half for removals, upper half for installs */
360 solv->watches = solv_calloc(2 * nsolvables, sizeof(Id));
361 for (i = 1, r = solv->rules + solv->nrules - 1; i < solv->nrules; i++, r--)
362 {
363 if (!r->w2) /* assertions do not need watches */
364 continue;
365
366 /* see addwatches_rule(solv, r) */
367 r->n1 = solv->watches[nsolvables + r->w1];
368 solv->watches[nsolvables + r->w1] = r - solv->rules;
369
370 r->n2 = solv->watches[nsolvables + r->w2];
371 solv->watches[nsolvables + r->w2] = r - solv->rules;
372 }
373 }
374
375
376 /*-------------------------------------------------------------------
377 *
378 * add watches (for a new learned rule)
379 * sets up watches for a single rule
380 *
381 * see also makewatches() above.
382 */
383
384 static inline void
addwatches_rule(Solver * solv,Rule * r)385 addwatches_rule(Solver *solv, Rule *r)
386 {
387 int nsolvables = solv->pool->nsolvables;
388
389 r->n1 = solv->watches[nsolvables + r->w1];
390 solv->watches[nsolvables + r->w1] = r - solv->rules;
391
392 r->n2 = solv->watches[nsolvables + r->w2];
393 solv->watches[nsolvables + r->w2] = r - solv->rules;
394 }
395
396
397 /********************************************************************/
398 /*
399 * rule propagation
400 */
401
402
403 /* shortcuts to check if a literal (positive or negative) assignment
404 * evaluates to 'true' or 'false'
405 */
406 #define DECISIONMAP_TRUE(p) ((p) > 0 ? (decisionmap[p] > 0) : (decisionmap[-p] < 0))
407 #define DECISIONMAP_FALSE(p) ((p) > 0 ? (decisionmap[p] < 0) : (decisionmap[-p] > 0))
408 #define DECISIONMAP_UNDEF(p) (decisionmap[(p) > 0 ? (p) : -(p)] == 0)
409
410 /*-------------------------------------------------------------------
411 *
412 * propagate
413 *
414 * make decision and propagate to all rules
415 *
416 * Evaluate each term affected by the decision (linked through watches).
417 * If we find unit rules we make new decisions based on them.
418 *
419 * return : 0 = everything is OK
420 * rule = conflict found in this rule
421 */
422
423 static Rule *
propagate(Solver * solv,int level)424 propagate(Solver *solv, int level)
425 {
426 Pool *pool = solv->pool;
427 Id *rp, *next_rp; /* rule pointer, next rule pointer in linked list */
428 Rule *r; /* rule */
429 Id p, pkg, other_watch;
430 Id *dp;
431 Id *decisionmap = solv->decisionmap;
432 Id *watches = solv->watches + pool->nsolvables; /* place ptr in middle */
433
434 POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "----- propagate level %d -----\n", level);
435
436 /* foreach non-propagated decision */
437 while (solv->propagate_index < solv->decisionq.count)
438 {
439 /*
440 * 'pkg' was just decided
441 * negate because our watches trigger if literal goes FALSE
442 */
443 pkg = -solv->decisionq.elements[solv->propagate_index++];
444
445 IF_POOLDEBUG (SOLV_DEBUG_PROPAGATE)
446 {
447 POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "propagate decision %d:", -pkg);
448 solver_printruleelement(solv, SOLV_DEBUG_PROPAGATE, 0, -pkg);
449 }
450
451 /* foreach rule where 'pkg' is now FALSE */
452 for (rp = watches + pkg; *rp; rp = next_rp)
453 {
454 r = solv->rules + *rp;
455 if (r->d < 0)
456 {
457 /* rule is disabled, goto next */
458 if (pkg == r->w1)
459 next_rp = &r->n1;
460 else
461 next_rp = &r->n2;
462 continue;
463 }
464
465 IF_POOLDEBUG (SOLV_DEBUG_WATCHES)
466 {
467 POOL_DEBUG(SOLV_DEBUG_WATCHES, " watch triggered ");
468 solver_printrule(solv, SOLV_DEBUG_WATCHES, r);
469 }
470
471 /*
472 * 'pkg' was just decided (was set to FALSE), so this rule
473 * may now be unit.
474 */
475 /* find the other watch */
476 if (pkg == r->w1)
477 {
478 other_watch = r->w2;
479 next_rp = &r->n1;
480 }
481 else
482 {
483 other_watch = r->w1;
484 next_rp = &r->n2;
485 }
486
487 /*
488 * if the other watch is true we have nothing to do
489 */
490 if (DECISIONMAP_TRUE(other_watch))
491 continue;
492
493 /*
494 * The other literal is FALSE or UNDEF
495 *
496 */
497
498 if (r->d)
499 {
500 /* Not a binary clause, try to move our watch.
501 *
502 * Go over all literals and find one that is
503 * not other_watch
504 * and not FALSE
505 *
506 * (TRUE is also ok, in that case the rule is fulfilled)
507 * As speed matters here we do not use the FOR_RULELITERALS
508 * macro.
509 */
510 if (r->p /* we have a 'p' */
511 && r->p != other_watch /* which is not watched */
512 && !DECISIONMAP_FALSE(r->p)) /* and not FALSE */
513 {
514 p = r->p;
515 }
516 else /* go find a 'd' to make 'true' */
517 {
518 /* foreach p in 'd'
519 we just iterate sequentially, doing it in another order just changes the order of decisions, not the decisions itself
520 */
521 for (dp = pool->whatprovidesdata + r->d; (p = *dp++) != 0;)
522 {
523 if (p != other_watch /* which is not watched */
524 && !DECISIONMAP_FALSE(p)) /* and not FALSE */
525 break;
526 }
527 }
528
529 if (p)
530 {
531 /*
532 * if we found some p that is UNDEF or TRUE, move
533 * watch to it
534 */
535 IF_POOLDEBUG (SOLV_DEBUG_WATCHES)
536 {
537 if (p > 0)
538 POOL_DEBUG(SOLV_DEBUG_WATCHES, " -> move w%d to %s\n", (pkg == r->w1 ? 1 : 2), pool_solvid2str(pool, p));
539 else
540 POOL_DEBUG(SOLV_DEBUG_WATCHES, " -> move w%d to !%s\n", (pkg == r->w1 ? 1 : 2), pool_solvid2str(pool, -p));
541 }
542
543 *rp = *next_rp;
544 next_rp = rp;
545
546 if (pkg == r->w1)
547 {
548 r->w1 = p;
549 r->n1 = watches[p];
550 }
551 else
552 {
553 r->w2 = p;
554 r->n2 = watches[p];
555 }
556 watches[p] = r - solv->rules;
557 continue;
558 }
559 /* search failed, thus all unwatched literals are FALSE */
560
561 } /* not binary */
562
563 /*
564 * unit clause found, set literal other_watch to TRUE
565 */
566
567 if (DECISIONMAP_FALSE(other_watch)) /* check if literal is FALSE */
568 return r; /* eek, a conflict! */
569
570 IF_POOLDEBUG (SOLV_DEBUG_PROPAGATE)
571 {
572 POOL_DEBUG(SOLV_DEBUG_PROPAGATE, " unit ");
573 solver_printrule(solv, SOLV_DEBUG_PROPAGATE, r);
574 }
575
576 if (other_watch > 0)
577 decisionmap[other_watch] = level; /* install! */
578 else
579 decisionmap[-other_watch] = -level; /* remove! */
580
581 queue_push(&solv->decisionq, other_watch);
582 queue_push(&solv->decisionq_why, r - solv->rules);
583
584 IF_POOLDEBUG (SOLV_DEBUG_PROPAGATE)
585 {
586 if (other_watch > 0)
587 POOL_DEBUG(SOLV_DEBUG_PROPAGATE, " -> decided to install %s\n", pool_solvid2str(pool, other_watch));
588 else
589 POOL_DEBUG(SOLV_DEBUG_PROPAGATE, " -> decided to conflict %s\n", pool_solvid2str(pool, -other_watch));
590 }
591
592 } /* foreach rule involving 'pkg' */
593
594 } /* while we have non-decided decisions */
595
596 POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "----- propagate end -----\n");
597
598 return 0; /* all is well */
599 }
600
601
602 /********************************************************************/
603 /* Analysis */
604
605 /*-------------------------------------------------------------------
606 *
607 * revert
608 * revert decisionq to a level
609 */
610
611 static void
revert(Solver * solv,int level)612 revert(Solver *solv, int level)
613 {
614 Pool *pool = solv->pool;
615 Id v, vv;
616 while (solv->decisionq.count)
617 {
618 v = solv->decisionq.elements[solv->decisionq.count - 1];
619 vv = v > 0 ? v : -v;
620 if (solv->decisionmap[vv] <= level && solv->decisionmap[vv] >= -level)
621 break;
622 POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "reverting decision %d at %d\n", v, solv->decisionmap[vv]);
623 solv->decisionmap[vv] = 0;
624 solv->decisionq.count--;
625 solv->decisionq_why.count--;
626 solv->propagate_index = solv->decisionq.count;
627 }
628 while (solv->branches.count && solv->branches.elements[solv->branches.count - 1] >= level)
629 solv->branches.count -= solv->branches.elements[solv->branches.count - 2];
630 if (solv->recommends_index > solv->decisionq.count)
631 solv->recommends_index = -1; /* rebuild recommends/suggests maps */
632 solv->decisionq_reason.count = level + 1;
633 }
634
635 /*-------------------------------------------------------------------
636 *
637 * watch2onhighest - put watch2 on literal with highest level
638 */
639
640 static inline void
watch2onhighest(Solver * solv,Rule * r)641 watch2onhighest(Solver *solv, Rule *r)
642 {
643 int l, wl = 0;
644 Id d, v, *dp;
645
646 d = r->d < 0 ? -r->d - 1 : r->d;
647 if (!d)
648 return; /* binary rule, both watches are set */
649 dp = solv->pool->whatprovidesdata + d;
650 while ((v = *dp++) != 0)
651 {
652 l = solv->decisionmap[v < 0 ? -v : v];
653 if (l < 0)
654 l = -l;
655 if (l > wl)
656 {
657 r->w2 = dp[-1];
658 wl = l;
659 }
660 }
661 }
662
663
664 /*-------------------------------------------------------------------
665 *
666 * analyze
667 * and learn
668 */
669
670 static int
analyze(Solver * solv,int level,Rule * c,Rule ** lrp)671 analyze(Solver *solv, int level, Rule *c, Rule **lrp)
672 {
673 Pool *pool = solv->pool;
674 Queue q;
675 Rule *r;
676 Id q_buf[8];
677 int rlevel = 1;
678 Map seen; /* global? */
679 Id p = 0, pp, v, vv, why;
680 int l, i, idx;
681 int num = 0, l1num = 0;
682 int learnt_why = solv->learnt_pool.count;
683 Id *decisionmap = solv->decisionmap;
684
685 queue_init_buffer(&q, q_buf, sizeof(q_buf)/sizeof(*q_buf));
686
687 POOL_DEBUG(SOLV_DEBUG_ANALYZE, "ANALYZE at %d ----------------------\n", level);
688 map_init(&seen, pool->nsolvables);
689 idx = solv->decisionq.count;
690 for (;;)
691 {
692 IF_POOLDEBUG (SOLV_DEBUG_ANALYZE)
693 solver_printruleclass(solv, SOLV_DEBUG_ANALYZE, c);
694 queue_push(&solv->learnt_pool, c - solv->rules);
695 FOR_RULELITERALS(v, pp, c)
696 {
697 if (DECISIONMAP_TRUE(v)) /* the one true literal */
698 continue;
699 vv = v > 0 ? v : -v;
700 if (MAPTST(&seen, vv))
701 continue;
702 MAPSET(&seen, vv); /* mark that we also need to look at this literal */
703 l = solv->decisionmap[vv];
704 if (l < 0)
705 l = -l;
706 if (l == 1)
707 l1num++; /* need to do this one in level1 pass */
708 else if (l == level)
709 num++; /* need to do this one as well */
710 else
711 {
712 queue_push(&q, v); /* not level1 or conflict level, add to new rule */
713 if (l > rlevel)
714 rlevel = l;
715 }
716 }
717 l1retry:
718 if (!num && !--l1num)
719 break; /* all literals done */
720
721 /* find the next literal to investigate */
722 /* (as num + l1num > 0, we know that we'll always find one) */
723 for (;;)
724 {
725 assert(idx > 0);
726 v = solv->decisionq.elements[--idx];
727 vv = v > 0 ? v : -v;
728 if (MAPTST(&seen, vv))
729 break;
730 }
731 MAPCLR(&seen, vv);
732
733 if (num && --num == 0)
734 {
735 /* done with normal literals, now start level 1 literal processing */
736 p = -v; /* so that v doesn't get lost */
737 if (!l1num)
738 break;
739 POOL_DEBUG(SOLV_DEBUG_ANALYZE, "got %d involved level 1 decisions\n", l1num);
740 /* clear non-l1 bits from seen map */
741 for (i = 0; i < q.count; i++)
742 {
743 v = q.elements[i];
744 MAPCLR(&seen, v > 0 ? v : -v);
745 }
746 /* only level 1 marks left in seen map */
747 l1num++; /* as l1retry decrements it */
748 goto l1retry;
749 }
750
751 why = solv->decisionq_why.elements[idx];
752 if (why <= 0) /* just in case, maybe for SYSTEMSOLVABLE */
753 goto l1retry;
754 c = solv->rules + why;
755 }
756 map_free(&seen);
757 assert(p != 0);
758 assert(rlevel > 0 && rlevel < level);
759 IF_POOLDEBUG (SOLV_DEBUG_ANALYZE)
760 {
761 POOL_DEBUG(SOLV_DEBUG_ANALYZE, "learned rule for level %d (am %d)\n", rlevel, level);
762 solver_printruleelement(solv, SOLV_DEBUG_ANALYZE, 0, p);
763 for (i = 0; i < q.count; i++)
764 solver_printruleelement(solv, SOLV_DEBUG_ANALYZE, 0, q.elements[i]);
765 }
766 /* push end marker on learnt reasons stack */
767 queue_push(&solv->learnt_pool, 0);
768 solv->stats_learned++;
769
770 POOL_DEBUG(SOLV_DEBUG_ANALYZE, "reverting decisions (level %d -> %d)\n", level, rlevel);
771 level = rlevel;
772 revert(solv, level);
773 if (q.count < 2)
774 {
775 Id d = q.count ? q.elements[0] : 0;
776 queue_free(&q);
777 r = solver_addrule(solv, p, d, 0);
778 }
779 else
780 {
781 Id d = pool_queuetowhatprovides(pool, &q);
782 queue_free(&q);
783 r = solver_addrule(solv, p, 0, d);
784 }
785 assert(solv->learnt_why.count == (r - solv->rules) - solv->learntrules);
786 queue_push(&solv->learnt_why, learnt_why);
787 if (r->w2)
788 {
789 /* needs watches */
790 watch2onhighest(solv, r);
791 addwatches_rule(solv, r);
792 }
793 else
794 {
795 /* rule is an assertion */
796 queue_push(&solv->ruleassertions, r - solv->rules);
797 }
798 *lrp = r;
799 return level;
800 }
801
802
803 /*-------------------------------------------------------------------
804 *
805 * solver_reset
806 *
807 * reset all solver decisions
808 * called after rules have been enabled/disabled
809 */
810
811 void
solver_reset(Solver * solv)812 solver_reset(Solver *solv)
813 {
814 int i;
815 Id v;
816
817 /* rewind all decisions */
818 for (i = solv->decisionq.count - 1; i >= 0; i--)
819 {
820 v = solv->decisionq.elements[i];
821 solv->decisionmap[v > 0 ? v : -v] = 0;
822 }
823 queue_empty(&solv->decisionq_why);
824 queue_empty(&solv->decisionq);
825 queue_empty(&solv->decisionq_reason);
826 solv->recommends_index = -1;
827 solv->propagate_index = 0;
828 queue_empty(&solv->branches);
829
830 /* adapt learnt rule status to new set of enabled/disabled rules */
831 enabledisablelearntrules(solv);
832 }
833
834 static inline int
queue_contains(Queue * q,Id id)835 queue_contains(Queue *q, Id id)
836 {
837 int i;
838 for (i = 0; i < q->count; i++)
839 if (q->elements[i] == id)
840 return 1;
841 return 0;
842 }
843
844 static void
disable_recommendsrules(Solver * solv,Queue * weakq)845 disable_recommendsrules(Solver *solv, Queue *weakq)
846 {
847 Pool *pool = solv->pool;
848 int i, rid;
849 for (i = 0; i < weakq->count; i++)
850 {
851 rid = weakq->elements[i];
852 if ((rid >= solv->recommendsrules && rid < solv->recommendsrules_end) || queue_contains(solv->recommendsruleq, rid))
853 {
854 Rule *r = solv->rules + rid;
855 if (r->d >= 0)
856 {
857 POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "disabling ");
858 solver_printruleclass(solv, SOLV_DEBUG_UNSOLVABLE, r);
859 solver_disablerule(solv, r);
860 }
861 }
862 }
863 }
864
865 /*-------------------------------------------------------------------
866 *
867 * analyze_unsolvable_rule
868 *
869 * recursion helper used by analyze_unsolvable
870 */
871
872 static void
analyze_unsolvable_rule(Solver * solv,Rule * r,Queue * weakq,Map * rseen)873 analyze_unsolvable_rule(Solver *solv, Rule *r, Queue *weakq, Map *rseen)
874 {
875 Pool *pool = solv->pool;
876 int i;
877 Id why = r - solv->rules;
878
879 IF_POOLDEBUG (SOLV_DEBUG_UNSOLVABLE)
880 solver_printruleclass(solv, SOLV_DEBUG_UNSOLVABLE, r);
881 if (solv->learntrules && why >= solv->learntrules)
882 {
883 if (MAPTST(rseen, why - solv->learntrules))
884 return;
885 MAPSET(rseen, why - solv->learntrules);
886 for (i = solv->learnt_why.elements[why - solv->learntrules]; solv->learnt_pool.elements[i]; i++)
887 if (solv->learnt_pool.elements[i] > 0)
888 analyze_unsolvable_rule(solv, solv->rules + solv->learnt_pool.elements[i], weakq, rseen);
889 return;
890 }
891 if (solv->weakrulemap.size && MAPTST(&solv->weakrulemap, why) && weakq)
892 queue_push(weakq, why);
893 /* add non-pkg rules to problem and disable */
894 if (why >= solv->pkgrules_end)
895 solver_recordproblem(solv, why);
896 }
897
898 /* fix a problem by disabling one or more weak rules */
899 static void
disable_weakrules(Solver * solv,Queue * weakq)900 disable_weakrules(Solver *solv, Queue *weakq)
901 {
902 Pool *pool = solv->pool;
903 int i;
904 Id lastweak = 0;
905 for (i = 0; i < weakq->count; i++)
906 if (weakq->elements[i] > lastweak)
907 lastweak = weakq->elements[i];
908 if (lastweak >= solv->recommendsrules && lastweak < solv->recommendsrules_end)
909 {
910 lastweak = 0;
911 for (i = 0; i < weakq->count; i++)
912 if (weakq->elements[i] < solv->recommendsrules && weakq->elements[i] > lastweak)
913 lastweak = weakq->elements[i];
914 if (lastweak < solv->pkgrules_end)
915 {
916 disable_recommendsrules(solv, weakq);
917 return;
918 }
919 }
920 if (lastweak < solv->pkgrules_end && solv->strongrecommends && solv->recommendsruleq && queue_contains(solv->recommendsruleq, lastweak))
921 {
922 disable_recommendsrules(solv, weakq);
923 return;
924 }
925 POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "disabling ");
926 solver_printruleclass(solv, SOLV_DEBUG_UNSOLVABLE, solv->rules + lastweak);
927 /* choice rules need special handling */
928 if (lastweak >= solv->choicerules && lastweak < solv->choicerules_end)
929 solver_disablechoicerules(solv, solv->rules + lastweak);
930 else
931 solver_fixproblem(solv, lastweak);
932 }
933
934 /*-------------------------------------------------------------------
935 *
936 * analyze_unsolvable (called from setpropagatelearn)
937 *
938 * We know that the problem is not solvable. Record all involved
939 * rules (i.e. the "proof") into solv->learnt_pool.
940 * Record the learnt pool index and all non-pkg rules into
941 * solv->problems. (Our solutions to fix the problems are to
942 * disable those rules.)
943 *
944 * If the proof contains at least one weak rule, we disable the
945 * last of them.
946 *
947 * Otherwise we return -1 if disablerules is not set or disable
948 * _all_ of the problem rules and return 0.
949 *
950 * return: 0 - disabled some rules, try again
951 * -1 - hopeless
952 */
953
954 static int
analyze_unsolvable(Solver * solv,Rule * cr,int disablerules)955 analyze_unsolvable(Solver *solv, Rule *cr, int disablerules)
956 {
957 Pool *pool = solv->pool;
958 Rule *r;
959 Map involved; /* global to speed things up? */
960 Map rseen;
961 Queue weakq;
962 Id pp, v, vv, why;
963 int idx;
964 Id *decisionmap = solv->decisionmap;
965 int oldproblemcount;
966 int oldlearntpoolcount;
967 int record_proof = 1;
968
969 POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "ANALYZE UNSOLVABLE ----------------------\n");
970 solv->stats_unsolvable++;
971 oldproblemcount = solv->problems.count;
972 oldlearntpoolcount = solv->learnt_pool.count;
973
974 /* make room for proof index */
975 /* must update it later, as analyze_unsolvable_rule would confuse
976 * it with a rule index if we put the real value in already */
977 queue_push(&solv->problems, 0);
978
979 r = cr;
980 map_init(&involved, pool->nsolvables);
981 map_init(&rseen, solv->learntrules ? solv->nrules - solv->learntrules : 0);
982 queue_init(&weakq);
983 if (record_proof)
984 queue_push(&solv->learnt_pool, r - solv->rules);
985 analyze_unsolvable_rule(solv, r, &weakq, &rseen);
986 FOR_RULELITERALS(v, pp, r)
987 {
988 if (DECISIONMAP_TRUE(v)) /* the one true literal */
989 continue;
990 vv = v > 0 ? v : -v;
991 MAPSET(&involved, vv);
992 }
993 idx = solv->decisionq.count;
994 while (idx > 0)
995 {
996 v = solv->decisionq.elements[--idx];
997 vv = v > 0 ? v : -v;
998 if (!MAPTST(&involved, vv) || vv == SYSTEMSOLVABLE)
999 continue;
1000 why = solv->decisionq_why.elements[idx];
1001 assert(why > 0);
1002 if (record_proof)
1003 queue_push(&solv->learnt_pool, why);
1004 r = solv->rules + why;
1005 analyze_unsolvable_rule(solv, r, &weakq, &rseen);
1006 FOR_RULELITERALS(v, pp, r)
1007 {
1008 if (DECISIONMAP_TRUE(v)) /* the one true literal */
1009 continue;
1010 vv = v > 0 ? v : -v;
1011 MAPSET(&involved, vv);
1012 }
1013 }
1014 map_free(&involved);
1015 map_free(&rseen);
1016 queue_push(&solv->problems, 0); /* mark end of this problem */
1017
1018 if (weakq.count)
1019 {
1020 /* revert problems */
1021 solv->problems.count = oldproblemcount;
1022 solv->learnt_pool.count = oldlearntpoolcount;
1023 /* disable some weak rules */
1024 disable_weakrules(solv, &weakq);
1025 queue_free(&weakq);
1026 solver_reset(solv);
1027 return 0;
1028 }
1029 queue_free(&weakq);
1030
1031 if (solv->allowuninstall || solv->allowuninstall_all || solv->allowuninstallmap.size)
1032 if (solver_autouninstall(solv, oldproblemcount) != 0)
1033 {
1034 solv->problems.count = oldproblemcount;
1035 solv->learnt_pool.count = oldlearntpoolcount;
1036 solver_reset(solv);
1037 return 0;
1038 }
1039
1040 /* finish proof */
1041 if (record_proof)
1042 {
1043 queue_push(&solv->learnt_pool, 0);
1044 solv->problems.elements[oldproblemcount] = oldlearntpoolcount;
1045 }
1046
1047 /* + 2: index + trailing zero */
1048 if (disablerules && oldproblemcount + 2 < solv->problems.count)
1049 {
1050 solver_disableproblemset(solv, oldproblemcount);
1051 /* XXX: might want to enable all weak rules again */
1052 solver_reset(solv);
1053 return 0;
1054 }
1055 POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "UNSOLVABLE\n");
1056 return -1;
1057 }
1058
1059
1060 /*-------------------------------------------------------------------
1061 *
1062 * setpropagatelearn
1063 *
1064 * add free decision (solvable to install) to decisionq
1065 * increase level and propagate decision
1066 * return if no conflict.
1067 *
1068 * in conflict case, analyze conflict rule, add resulting
1069 * rule to learnt rule set, make decision from learnt
1070 * rule (always unit) and re-propagate.
1071 *
1072 * returns the new solver level or -1 if unsolvable
1073 *
1074 */
1075
1076 static int
setpropagatelearn(Solver * solv,int level,Id decision,int disablerules,Id ruleid,Id reason)1077 setpropagatelearn(Solver *solv, int level, Id decision, int disablerules, Id ruleid, Id reason)
1078 {
1079 Pool *pool = solv->pool;
1080 Rule *r, *lr;
1081
1082 if (decision)
1083 {
1084 level++;
1085 if (decision > 0)
1086 solv->decisionmap[decision] = level;
1087 else
1088 solv->decisionmap[-decision] = -level;
1089 queue_push(&solv->decisionq, decision);
1090 queue_push(&solv->decisionq_why, -ruleid); /* <= 0 -> free decision */
1091 queue_push(&solv->decisionq_reason, reason);
1092 }
1093 assert(ruleid >= 0 && level > 0);
1094 for (;;)
1095 {
1096 r = propagate(solv, level);
1097 if (!r)
1098 break;
1099 if (level == 1)
1100 return analyze_unsolvable(solv, r, disablerules);
1101 POOL_DEBUG(SOLV_DEBUG_ANALYZE, "conflict with rule #%d\n", (int)(r - solv->rules));
1102 level = analyze(solv, level, r, &lr);
1103 /* the new rule is unit by design */
1104 decision = lr->p;
1105 solv->decisionmap[decision > 0 ? decision : -decision] = decision > 0 ? level : -level;
1106 queue_push(&solv->decisionq, decision);
1107 queue_push(&solv->decisionq_why, lr - solv->rules);
1108 IF_POOLDEBUG (SOLV_DEBUG_ANALYZE)
1109 {
1110 POOL_DEBUG(SOLV_DEBUG_ANALYZE, "decision: ");
1111 solver_printruleelement(solv, SOLV_DEBUG_ANALYZE, 0, decision);
1112 POOL_DEBUG(SOLV_DEBUG_ANALYZE, "new rule: ");
1113 solver_printrule(solv, SOLV_DEBUG_ANALYZE, lr);
1114 }
1115 }
1116 return level;
1117 }
1118
1119 static void
reorder_dq_for_future_installed(Solver * solv,int level,Queue * dq)1120 reorder_dq_for_future_installed(Solver *solv, int level, Queue *dq)
1121 {
1122 Pool *pool = solv->pool;
1123 int i, j, haveone = 0, dqcount = dq->count;
1124 int decisionqcount = solv->decisionq.count;
1125 Id p;
1126 Solvable *s;
1127
1128 /* at the time we process jobrules the installed packages are not kept yet */
1129 /* reorder so that "future-supplemented" packages come first */
1130 FOR_REPO_SOLVABLES(solv->installed, p, s)
1131 {
1132 if (MAPTST(&solv->noupdate, p - solv->installed->start))
1133 continue;
1134 if (solv->decisionmap[p] == 0)
1135 {
1136 if (s->recommends || s->suggests)
1137 queue_push(&solv->decisionq, p);
1138 solv->decisionmap[p] = level + 1;
1139 haveone = 1;
1140 }
1141 }
1142 if (!haveone)
1143 return;
1144 policy_update_recommendsmap(solv);
1145 for (i = 0; i < dqcount; i++)
1146 {
1147 p = dq->elements[i];
1148 if (!(pool->solvables[p].repo == solv->installed || MAPTST(&solv->suggestsmap, p) || solver_is_enhancing(solv, pool->solvables + p)))
1149 {
1150 queue_push(dq, p);
1151 dq->elements[i] = 0;
1152 }
1153 }
1154 dqcount = dq->count;
1155 for (i = 0; i < dqcount; i++)
1156 {
1157 p = dq->elements[i];
1158 if (p && !(pool->solvables[p].repo == solv->installed || MAPTST(&solv->recommendsmap, p) || solver_is_supplementing(solv, pool->solvables + p)))
1159 {
1160 queue_push(dq, p);
1161 dq->elements[i] = 0;
1162 }
1163 }
1164 for (i = j = 0; i < dq->count; i++)
1165 if (dq->elements[i])
1166 dq->elements[j++] = dq->elements[i];
1167 queue_truncate(dq, j);
1168 FOR_REPO_SOLVABLES(solv->installed, p, s)
1169 if (solv->decisionmap[p] == level + 1)
1170 solv->decisionmap[p] = 0;
1171 if (solv->decisionq.count != decisionqcount)
1172 {
1173 solv->recommends_index = -1;
1174 queue_truncate(&solv->decisionq, decisionqcount);
1175 }
1176 /* but obey favored maps */
1177 policy_prefer_favored(solv, dq);
1178 }
1179
1180 /*-------------------------------------------------------------------
1181 *
1182 * branch handling
1183 *
1184 * format is:
1185 * [ -p1 p2 p3 .. pn opt_pkg opt_data size level ]
1186 *
1187 * pkgs are negative if we tried them (to prevent inifinite recursion)
1188 * opt_pkg: recommends: package with the recommends
1189 * rule: 0
1190 * opt_data: recommends: depid
1191 * rule: ruleid
1192 */
1193
1194 static void
createbranch(Solver * solv,int level,Queue * dq,Id p,Id data)1195 createbranch(Solver *solv, int level, Queue *dq, Id p, Id data)
1196 {
1197 Pool *pool = solv->pool;
1198 int i;
1199 IF_POOLDEBUG (SOLV_DEBUG_POLICY)
1200 {
1201 POOL_DEBUG (SOLV_DEBUG_POLICY, "creating a branch [data=%d]:\n", data);
1202 for (i = 0; i < dq->count; i++)
1203 POOL_DEBUG (SOLV_DEBUG_POLICY, " - %s\n", pool_solvid2str(pool, dq->elements[i]));
1204 }
1205 queue_push(&solv->branches, -dq->elements[0]);
1206 for (i = 1; i < dq->count; i++)
1207 queue_push(&solv->branches, dq->elements[i]);
1208 queue_push2(&solv->branches, p, data);
1209 queue_push2(&solv->branches, dq->count + 4, level);
1210 }
1211
1212 static int
takebranch(Solver * solv,int pos,int end,const char * msg,int disablerules)1213 takebranch(Solver *solv, int pos, int end, const char *msg, int disablerules)
1214 {
1215 Pool *pool = solv->pool;
1216 int level;
1217 Id p, why, reason;
1218 #if 0
1219 {
1220 int i;
1221 printf("branch group level %d [%d-%d] %d %d:\n", solv->branches.elements[end - 1], end - solv->branches.elements[end - 2], end, solv->branches.elements[end - 4], solv->branches.elements[end - 3]);
1222 for (i = end - solv->branches.elements[end - 2]; i < end - 4; i++)
1223 printf("%c %c%s\n", i == pos ? 'x' : ' ', solv->branches.elements[i] >= 0 ? ' ' : '-', pool_solvid2str(pool, solv->branches.elements[i] >= 0 ? solv->branches.elements[i] : -solv->branches.elements[i]));
1224 }
1225 #endif
1226 level = solv->branches.elements[end - 1];
1227 p = solv->branches.elements[pos];
1228 solv->branches.elements[pos] = -p;
1229 POOL_DEBUG(SOLV_DEBUG_SOLVER, "%s %d -> %d with %s\n", msg, solv->decisionmap[p], level, pool_solvid2str(pool, p));
1230 /* hack: set level to zero so that revert does not remove the branch */
1231 solv->branches.elements[end - 1] = 0;
1232 revert(solv, level);
1233 solv->branches.elements[end - 1] = level;
1234 /* hack: revert simply sets the count, so we can still access the reverted elements */
1235 why = -solv->decisionq_why.elements[solv->decisionq_why.count];
1236 assert(why >= 0);
1237 reason = solv->decisionq_reason.elements[level + 1];
1238 return setpropagatelearn(solv, level, p, disablerules, why, reason);
1239 }
1240
1241 /*-------------------------------------------------------------------
1242 *
1243 * select and install
1244 *
1245 * install best package from the queue. We add an extra package, inst, if
1246 * provided. See comment in weak install section.
1247 *
1248 * returns the new solver level or -1 if unsolvable
1249 *
1250 */
1251
1252 static int
selectandinstall(Solver * solv,int level,Queue * dq,int disablerules,Id ruleid,Id reason)1253 selectandinstall(Solver *solv, int level, Queue *dq, int disablerules, Id ruleid, Id reason)
1254 {
1255 Pool *pool = solv->pool;
1256 Id p;
1257
1258 if (dq->count > 1)
1259 policy_filter_unwanted(solv, dq, POLICY_MODE_CHOOSE);
1260 /* if we're resolving rules and didn't resolve the installed packages yet,
1261 * do some special supplements ordering */
1262 if (dq->count > 1 && solv->do_extra_reordering)
1263 reorder_dq_for_future_installed(solv, level, dq);
1264 /* if we have multiple candidates we open a branch */
1265 if (dq->count > 1)
1266 createbranch(solv, level, dq, 0, ruleid);
1267 p = dq->elements[0];
1268 POOL_DEBUG(SOLV_DEBUG_POLICY, "installing %s\n", pool_solvid2str(pool, p));
1269 return setpropagatelearn(solv, level, p, disablerules, ruleid, reason);
1270 }
1271
1272
1273 /********************************************************************/
1274 /* Main solver interface */
1275
1276
1277 /*-------------------------------------------------------------------
1278 *
1279 * solver_create
1280 * create solver structure
1281 *
1282 * pool: all available solvables
1283 * installed: installed Solvables
1284 *
1285 *
1286 * Upon solving, rules are created to flag the Solvables
1287 * of the 'installed' Repo as installed.
1288 */
1289
1290 Solver *
solver_create(Pool * pool)1291 solver_create(Pool *pool)
1292 {
1293 Solver *solv;
1294 solv = (Solver *)solv_calloc(1, sizeof(Solver));
1295 solv->pool = pool;
1296 solv->installed = pool->installed;
1297
1298 solv->allownamechange = 1;
1299
1300 solv->dup_allowdowngrade = 1;
1301 solv->dup_allownamechange = 1;
1302 solv->dup_allowarchchange = 1;
1303 solv->dup_allowvendorchange = 1;
1304
1305 solv->keepexplicitobsoletes = pool->noobsoletesmultiversion ? 0 : 1;
1306
1307 queue_init(&solv->ruletojob);
1308 queue_init(&solv->decisionq);
1309 queue_init(&solv->decisionq_why);
1310 queue_init(&solv->decisionq_reason);
1311 queue_init(&solv->problems);
1312 queue_init(&solv->orphaned);
1313 queue_init(&solv->learnt_why);
1314 queue_init(&solv->learnt_pool);
1315 queue_init(&solv->branches);
1316 queue_init(&solv->weakruleq);
1317 queue_init(&solv->ruleassertions);
1318 queue_init(&solv->addedmap_deduceq);
1319
1320 queue_push(&solv->learnt_pool, 0); /* so that 0 does not describe a proof */
1321
1322 map_init(&solv->recommendsmap, pool->nsolvables);
1323 map_init(&solv->suggestsmap, pool->nsolvables);
1324 map_init(&solv->noupdate, solv->installed ? solv->installed->end - solv->installed->start : 0);
1325 solv->recommends_index = 0;
1326
1327 solv->decisionmap = (Id *)solv_calloc(pool->nsolvables, sizeof(Id));
1328 solv->nrules = 1;
1329 solv->rules = solv_extend_resize(solv->rules, solv->nrules, sizeof(Rule), RULES_BLOCK);
1330 memset(solv->rules, 0, sizeof(Rule));
1331
1332 return solv;
1333 }
1334
1335
1336
1337 /*-------------------------------------------------------------------
1338 *
1339 * solver_free
1340 */
1341
1342 static inline void
queuep_free(Queue ** qp)1343 queuep_free(Queue **qp)
1344 {
1345 if (!*qp)
1346 return;
1347 queue_free(*qp);
1348 *qp = solv_free(*qp);
1349 }
1350
1351 static inline void
map_zerosize(Map * m)1352 map_zerosize(Map *m)
1353 {
1354 if (m->size)
1355 {
1356 map_free(m);
1357 map_init(m, 0);
1358 }
1359 }
1360
1361 void
solver_free(Solver * solv)1362 solver_free(Solver *solv)
1363 {
1364 queue_free(&solv->job);
1365 queue_free(&solv->ruletojob);
1366 queue_free(&solv->decisionq);
1367 queue_free(&solv->decisionq_why);
1368 queue_free(&solv->decisionq_reason);
1369 queue_free(&solv->learnt_why);
1370 queue_free(&solv->learnt_pool);
1371 queue_free(&solv->problems);
1372 queue_free(&solv->solutions);
1373 queue_free(&solv->orphaned);
1374 queue_free(&solv->branches);
1375 queue_free(&solv->weakruleq);
1376 queue_free(&solv->ruleassertions);
1377 queue_free(&solv->addedmap_deduceq);
1378 queuep_free(&solv->cleandeps_updatepkgs);
1379 queuep_free(&solv->cleandeps_mistakes);
1380 queuep_free(&solv->update_targets);
1381 queuep_free(&solv->installsuppdepq);
1382 queuep_free(&solv->recommendscplxq);
1383 queuep_free(&solv->suggestscplxq);
1384 queuep_free(&solv->brokenorphanrules);
1385 queuep_free(&solv->recommendsruleq);
1386
1387 map_free(&solv->recommendsmap);
1388 map_free(&solv->suggestsmap);
1389 map_free(&solv->noupdate);
1390 map_free(&solv->weakrulemap);
1391 map_free(&solv->multiversion);
1392
1393 map_free(&solv->updatemap);
1394 map_free(&solv->bestupdatemap);
1395 map_free(&solv->fixmap);
1396 map_free(&solv->dupmap);
1397 map_free(&solv->dupinvolvedmap);
1398 map_free(&solv->droporphanedmap);
1399 map_free(&solv->cleandepsmap);
1400 map_free(&solv->allowuninstallmap);
1401
1402 solv_free(solv->favormap);
1403 solv_free(solv->decisionmap);
1404 solv_free(solv->rules);
1405 solv_free(solv->watches);
1406 solv_free(solv->obsoletes);
1407 solv_free(solv->obsoletes_data);
1408 solv_free(solv->specialupdaters);
1409 solv_free(solv->choicerules_info);
1410 solv_free(solv->bestrules_info);
1411 solv_free(solv->yumobsrules_info);
1412 solv_free(solv->recommendsrules_info);
1413 solv_free(solv->instbuddy);
1414 solv_free(solv);
1415 }
1416
1417 int
solver_get_flag(Solver * solv,int flag)1418 solver_get_flag(Solver *solv, int flag)
1419 {
1420 switch (flag)
1421 {
1422 case SOLVER_FLAG_ALLOW_DOWNGRADE:
1423 return solv->allowdowngrade;
1424 case SOLVER_FLAG_ALLOW_NAMECHANGE:
1425 return solv->allownamechange;
1426 case SOLVER_FLAG_ALLOW_ARCHCHANGE:
1427 return solv->allowarchchange;
1428 case SOLVER_FLAG_ALLOW_VENDORCHANGE:
1429 return solv->allowvendorchange;
1430 case SOLVER_FLAG_ALLOW_UNINSTALL:
1431 return solv->allowuninstall;
1432 case SOLVER_FLAG_NO_UPDATEPROVIDE:
1433 return solv->noupdateprovide;
1434 case SOLVER_FLAG_SPLITPROVIDES:
1435 return solv->dosplitprovides;
1436 case SOLVER_FLAG_IGNORE_RECOMMENDED:
1437 return solv->dontinstallrecommended;
1438 case SOLVER_FLAG_ADD_ALREADY_RECOMMENDED:
1439 return solv->addalreadyrecommended;
1440 case SOLVER_FLAG_NO_INFARCHCHECK:
1441 return solv->noinfarchcheck;
1442 case SOLVER_FLAG_KEEP_EXPLICIT_OBSOLETES:
1443 return solv->keepexplicitobsoletes;
1444 case SOLVER_FLAG_BEST_OBEY_POLICY:
1445 return solv->bestobeypolicy;
1446 case SOLVER_FLAG_NO_AUTOTARGET:
1447 return solv->noautotarget;
1448 case SOLVER_FLAG_DUP_ALLOW_DOWNGRADE:
1449 return solv->dup_allowdowngrade;
1450 case SOLVER_FLAG_DUP_ALLOW_NAMECHANGE:
1451 return solv->dup_allownamechange;
1452 case SOLVER_FLAG_DUP_ALLOW_ARCHCHANGE:
1453 return solv->dup_allowarchchange;
1454 case SOLVER_FLAG_DUP_ALLOW_VENDORCHANGE:
1455 return solv->dup_allowvendorchange;
1456 case SOLVER_FLAG_KEEP_ORPHANS:
1457 return solv->keep_orphans;
1458 case SOLVER_FLAG_BREAK_ORPHANS:
1459 return solv->break_orphans;
1460 case SOLVER_FLAG_FOCUS_INSTALLED:
1461 return solv->focus_installed;
1462 case SOLVER_FLAG_FOCUS_BEST:
1463 return solv->focus_best;
1464 case SOLVER_FLAG_YUM_OBSOLETES:
1465 return solv->do_yum_obsoletes;
1466 case SOLVER_FLAG_NEED_UPDATEPROVIDE:
1467 return solv->needupdateprovide;
1468 case SOLVER_FLAG_URPM_REORDER:
1469 return solv->urpmreorder;
1470 case SOLVER_FLAG_STRONG_RECOMMENDS:
1471 return solv->strongrecommends;
1472 case SOLVER_FLAG_INSTALL_ALSO_UPDATES:
1473 return solv->install_also_updates;
1474 case SOLVER_FLAG_ONLY_NAMESPACE_RECOMMENDED:
1475 return solv->only_namespace_recommended;
1476 default:
1477 break;
1478 }
1479 return -1;
1480 }
1481
1482 int
solver_set_flag(Solver * solv,int flag,int value)1483 solver_set_flag(Solver *solv, int flag, int value)
1484 {
1485 int old = solver_get_flag(solv, flag);
1486 switch (flag)
1487 {
1488 case SOLVER_FLAG_ALLOW_DOWNGRADE:
1489 solv->allowdowngrade = value;
1490 break;
1491 case SOLVER_FLAG_ALLOW_NAMECHANGE:
1492 solv->allownamechange = value;
1493 break;
1494 case SOLVER_FLAG_ALLOW_ARCHCHANGE:
1495 solv->allowarchchange = value;
1496 break;
1497 case SOLVER_FLAG_ALLOW_VENDORCHANGE:
1498 solv->allowvendorchange = value;
1499 break;
1500 case SOLVER_FLAG_ALLOW_UNINSTALL:
1501 solv->allowuninstall = value;
1502 break;
1503 case SOLVER_FLAG_NO_UPDATEPROVIDE:
1504 solv->noupdateprovide = value;
1505 break;
1506 case SOLVER_FLAG_SPLITPROVIDES:
1507 solv->dosplitprovides = value;
1508 break;
1509 case SOLVER_FLAG_IGNORE_RECOMMENDED:
1510 solv->dontinstallrecommended = value;
1511 break;
1512 case SOLVER_FLAG_ADD_ALREADY_RECOMMENDED:
1513 solv->addalreadyrecommended = value;
1514 break;
1515 case SOLVER_FLAG_NO_INFARCHCHECK:
1516 solv->noinfarchcheck = value;
1517 break;
1518 case SOLVER_FLAG_KEEP_EXPLICIT_OBSOLETES:
1519 solv->keepexplicitobsoletes = value;
1520 break;
1521 case SOLVER_FLAG_BEST_OBEY_POLICY:
1522 solv->bestobeypolicy = value;
1523 break;
1524 case SOLVER_FLAG_NO_AUTOTARGET:
1525 solv->noautotarget = value;
1526 break;
1527 case SOLVER_FLAG_DUP_ALLOW_DOWNGRADE:
1528 solv->dup_allowdowngrade = value;
1529 break;
1530 case SOLVER_FLAG_DUP_ALLOW_NAMECHANGE:
1531 solv->dup_allownamechange = value;
1532 break;
1533 case SOLVER_FLAG_DUP_ALLOW_ARCHCHANGE:
1534 solv->dup_allowarchchange = value;
1535 break;
1536 case SOLVER_FLAG_DUP_ALLOW_VENDORCHANGE:
1537 solv->dup_allowvendorchange = value;
1538 break;
1539 case SOLVER_FLAG_KEEP_ORPHANS:
1540 solv->keep_orphans = value;
1541 break;
1542 case SOLVER_FLAG_BREAK_ORPHANS:
1543 solv->break_orphans = value;
1544 break;
1545 case SOLVER_FLAG_FOCUS_INSTALLED:
1546 solv->focus_installed = value;
1547 break;
1548 case SOLVER_FLAG_FOCUS_BEST:
1549 solv->focus_best = value;
1550 break;
1551 case SOLVER_FLAG_YUM_OBSOLETES:
1552 solv->do_yum_obsoletes = value;
1553 break;
1554 case SOLVER_FLAG_NEED_UPDATEPROVIDE:
1555 solv->needupdateprovide = value;
1556 break;
1557 case SOLVER_FLAG_URPM_REORDER:
1558 solv->urpmreorder = value;
1559 break;
1560 case SOLVER_FLAG_STRONG_RECOMMENDS:
1561 solv->strongrecommends = value;
1562 break;
1563 case SOLVER_FLAG_INSTALL_ALSO_UPDATES:
1564 solv->install_also_updates = value;
1565 break;
1566 case SOLVER_FLAG_ONLY_NAMESPACE_RECOMMENDED:
1567 solv->only_namespace_recommended = value;
1568 break;
1569 default:
1570 break;
1571 }
1572 return old;
1573 }
1574
1575 static int
resolve_jobrules(Solver * solv,int level,int disablerules,Queue * dq)1576 resolve_jobrules(Solver *solv, int level, int disablerules, Queue *dq)
1577 {
1578 Pool *pool = solv->pool;
1579 int oldlevel = level;
1580 int i, olevel;
1581 Rule *r;
1582
1583 POOL_DEBUG(SOLV_DEBUG_SOLVER, "resolving job rules\n");
1584 for (i = solv->jobrules, r = solv->rules + i; i < solv->jobrules_end; i++, r++)
1585 {
1586 Id l, pp;
1587 if (r->d < 0) /* ignore disabled rules */
1588 continue;
1589 queue_empty(dq);
1590 FOR_RULELITERALS(l, pp, r)
1591 {
1592 if (l < 0)
1593 {
1594 if (solv->decisionmap[-l] <= 0)
1595 break;
1596 }
1597 else
1598 {
1599 if (solv->decisionmap[l] > 0)
1600 break;
1601 if (solv->decisionmap[l] == 0)
1602 queue_push(dq, l);
1603 }
1604 }
1605 if (l || !dq->count)
1606 continue;
1607 /* prune to installed if not updating */
1608 if (dq->count > 1 && solv->installed && !solv->updatemap_all &&
1609 !solv->install_also_updates &&
1610 !(solv->job.elements[solv->ruletojob.elements[i - solv->jobrules]] & SOLVER_ORUPDATE))
1611 {
1612 int j = dq->count, k;
1613 if (solv->updatemap.size)
1614 {
1615 /* do not prune if an installed package wants to be updated */
1616 for (j = 0; j < dq->count; j++)
1617 if (pool->solvables[dq->elements[j]].repo == solv->installed
1618 && MAPTST(&solv->updatemap, dq->elements[j] - solv->installed->start))
1619 break;
1620 }
1621 if (j == dq->count)
1622 {
1623 for (j = k = 0; j < dq->count; j++)
1624 if (pool->solvables[dq->elements[j]].repo == solv->installed)
1625 dq->elements[k++] = dq->elements[j];
1626 if (k)
1627 dq->count = k;
1628 }
1629 }
1630 olevel = level;
1631 level = selectandinstall(solv, level, dq, disablerules, i, SOLVER_REASON_RESOLVE_JOB);
1632 r = solv->rules + i; /* selectandinstall may have added more rules */
1633 if (level <= olevel)
1634 {
1635 if (level == olevel)
1636 {
1637 i--;
1638 r--;
1639 continue; /* try something else */
1640 }
1641 if (level < oldlevel)
1642 return level;
1643 /* redo from start of jobrules */
1644 i = solv->jobrules - 1;
1645 r = solv->rules + i;
1646 }
1647 }
1648 return level;
1649 }
1650
1651 static void
prune_to_update_targets(Solver * solv,Id * cp,Queue * q)1652 prune_to_update_targets(Solver *solv, Id *cp, Queue *q)
1653 {
1654 int i, j;
1655 Id p, *cp2;
1656 for (i = j = 0; i < q->count; i++)
1657 {
1658 p = q->elements[i];
1659 for (cp2 = cp; *cp2; cp2++)
1660 if (*cp2 == p)
1661 {
1662 q->elements[j++] = p;
1663 break;
1664 }
1665 }
1666 queue_truncate(q, j);
1667 }
1668
1669 static int
resolve_installed(Solver * solv,int level,int disablerules,Queue * dq)1670 resolve_installed(Solver *solv, int level, int disablerules, Queue *dq)
1671 {
1672 Pool *pool = solv->pool;
1673 Repo *installed = solv->installed;
1674 int i, n, pass;
1675 int installedpos = solv->installedpos;
1676 Solvable *s;
1677 Id p, pp;
1678 int olevel, origlevel = level;
1679
1680 POOL_DEBUG(SOLV_DEBUG_SOLVER, "resolving installed packages\n");
1681 if (!installedpos)
1682 installedpos = installed->start;
1683 /* we use two passes if we need to update packages
1684 * to create a better user experience */
1685 for (pass = solv->updatemap.size ? 0 : 1; pass < 2; )
1686 {
1687 int passlevel = level;
1688 Id *specialupdaters = solv->specialupdaters;
1689 /* start with installedpos, the position that gave us problems the last time */
1690 for (i = installedpos, n = installed->start; n < installed->end; i++, n++)
1691 {
1692 Rule *r, *rr;
1693 Id d;
1694
1695 if (i == installed->end)
1696 i = installed->start;
1697 s = pool->solvables + i;
1698 if (s->repo != installed)
1699 continue;
1700
1701 if (solv->decisionmap[i] > 0 && (!specialupdaters || !specialupdaters[i - installed->start]))
1702 continue; /* already decided */
1703 if (!pass && solv->updatemap.size && !MAPTST(&solv->updatemap, i - installed->start))
1704 continue; /* updates first */
1705 r = solv->rules + solv->updaterules + (i - installed->start);
1706 rr = r;
1707 if (!rr->p || rr->d < 0) /* disabled -> look at feature rule */
1708 rr -= solv->installed->end - solv->installed->start;
1709 if (!rr->p) /* identical to update rule? */
1710 rr = r;
1711 if (!rr->p)
1712 continue; /* orpaned package or pseudo package */
1713
1714 /* check if we should update this package to the latest version
1715 * noupdate is set for erase jobs, in that case we want to deinstall
1716 * the installed package and not replace it with a newer version
1717 * rr->p != i is for dup jobs where the installed package cannot be kept */
1718 if (dq->count)
1719 queue_empty(dq);
1720 if (!MAPTST(&solv->noupdate, i - installed->start) && (solv->decisionmap[i] < 0 || solv->updatemap_all || (solv->updatemap.size && MAPTST(&solv->updatemap, i - installed->start)) || (rr->p && rr->p != i)))
1721 {
1722 if (specialupdaters && (d = specialupdaters[i - installed->start]) != 0)
1723 {
1724 int j;
1725 /* special multiversion handling, make sure best version is chosen */
1726 if (rr->p == i && solv->decisionmap[i] >= 0)
1727 queue_push(dq, i);
1728 while ((p = pool->whatprovidesdata[d++]) != 0)
1729 if (solv->decisionmap[p] >= 0)
1730 queue_push(dq, p);
1731 for (j = 0; j < dq->count; j++)
1732 {
1733 Id p2 = dq->elements[j];
1734 if (pool->solvables[p2].repo != installed)
1735 continue;
1736 d = specialupdaters[i - installed->start];
1737 while ((p = pool->whatprovidesdata[d++]) != 0)
1738 {
1739 if (solv->decisionmap[p] >= 0 || pool->solvables[p].repo == installed)
1740 continue;
1741 if (solvable_identical(pool->solvables + p, pool->solvables + p2))
1742 queue_push(dq, p); /* identical to installed, put it on the list so we have a repo prio */
1743 }
1744 }
1745 if (dq->count && solv->update_targets && solv->update_targets->elements[i - installed->start])
1746 prune_to_update_targets(solv, solv->update_targets->elements + solv->update_targets->elements[i - installed->start], dq);
1747 if (dq->count)
1748 {
1749 policy_filter_unwanted(solv, dq, POLICY_MODE_CHOOSE);
1750 p = dq->elements[0];
1751 if (p != i && solv->decisionmap[p] == 0)
1752 {
1753 rr = solv->rules + solv->featurerules + (i - solv->installed->start);
1754 if (!rr->p) /* update rule == feature rule? */
1755 rr = rr - solv->featurerules + solv->updaterules;
1756 dq->count = 1;
1757 }
1758 else
1759 dq->count = 0;
1760 }
1761 }
1762 else
1763 {
1764 /* update to best package of the update rule */
1765 FOR_RULELITERALS(p, pp, rr)
1766 {
1767 if (solv->decisionmap[p] > 0)
1768 {
1769 dq->count = 0; /* already fulfilled */
1770 break;
1771 }
1772 if (!solv->decisionmap[p])
1773 queue_push(dq, p);
1774 }
1775 }
1776 }
1777 if (dq->count && solv->update_targets && solv->update_targets->elements[i - installed->start])
1778 prune_to_update_targets(solv, solv->update_targets->elements + solv->update_targets->elements[i - installed->start], dq);
1779 /* install best version */
1780 if (dq->count)
1781 {
1782 olevel = level;
1783 level = selectandinstall(solv, level, dq, disablerules, rr - solv->rules, SOLVER_REASON_UPDATE_INSTALLED);
1784 if (level <= olevel)
1785 {
1786 if (level < passlevel)
1787 break; /* trouble */
1788 if (level < olevel)
1789 n = installed->start; /* redo all */
1790 i--;
1791 n--;
1792 continue;
1793 }
1794 }
1795 /* if still undecided keep package */
1796 if (solv->decisionmap[i] == 0)
1797 {
1798 olevel = level;
1799 if (solv->cleandepsmap.size && MAPTST(&solv->cleandepsmap, i - installed->start))
1800 {
1801 #if 0
1802 POOL_DEBUG(SOLV_DEBUG_POLICY, "cleandeps erasing %s\n", pool_solvid2str(pool, i));
1803 level = setpropagatelearn(solv, level, -i, disablerules, 0, SOLVER_REASON_CLEANDEPS_ERASE);
1804 #else
1805 continue;
1806 #endif
1807 }
1808 else
1809 {
1810 POOL_DEBUG(SOLV_DEBUG_POLICY, "keeping %s\n", pool_solvid2str(pool, i));
1811 level = setpropagatelearn(solv, level, i, disablerules, r - solv->rules, SOLVER_REASON_KEEP_INSTALLED);
1812 }
1813 if (level <= olevel)
1814 {
1815 if (level < passlevel)
1816 break; /* trouble */
1817 if (level < olevel)
1818 n = installed->start; /* redo all */
1819 i--;
1820 n--;
1821 continue; /* retry with learnt rule */
1822 }
1823 }
1824 }
1825 if (n < installed->end)
1826 {
1827 installedpos = i; /* retry problem solvable next time */
1828 if (level < origlevel)
1829 break; /* ran into trouble */
1830 /* re-run all passes */
1831 pass = solv->updatemap.size ? 0 : 1;
1832 continue;
1833 }
1834 /* reset installedpos, advance to next pass */
1835 installedpos = installed->start;
1836 pass++;
1837 }
1838 solv->installedpos = installedpos;
1839 return level;
1840 }
1841
1842 /* one or more installed cleandeps packages in dq that are to be updated */
1843 /* we need to emulate the code in resolve_installed */
1844 static void
do_cleandeps_update_filter(Solver * solv,Queue * dq)1845 do_cleandeps_update_filter(Solver *solv, Queue *dq)
1846 {
1847 Pool *pool = solv->pool;
1848 Repo *installed = solv->installed;
1849 Id *specialupdaters = solv->specialupdaters;
1850 Id p, p2, pp, d;
1851 Queue q;
1852 int i, j, k;
1853
1854 queue_init(&q);
1855 for (i = 0; i < dq->count; i++)
1856 {
1857 Id p = dq->elements[i];
1858 if (p < 0)
1859 p = -p;
1860 if (pool->solvables[p].repo != installed || !MAPTST(&solv->cleandepsmap, p - installed->start))
1861 continue;
1862 queue_empty(&q);
1863 /* find updaters */
1864 if (specialupdaters && (d = specialupdaters[p - installed->start]) != 0)
1865 {
1866 while ((p2 = pool->whatprovidesdata[d++]) != 0)
1867 if (solv->decisionmap[p2] >= 0)
1868 queue_push(&q, p2);
1869 }
1870 else
1871 {
1872 Rule *r = solv->rules + solv->updaterules + (p - installed->start);
1873 if (r->p)
1874 {
1875 FOR_RULELITERALS(p2, pp, r)
1876 if (solv->decisionmap[p2] >= 0)
1877 queue_push(&q, p2);
1878 }
1879 }
1880 if (q.count && solv->update_targets && solv->update_targets->elements[p - installed->start])
1881 prune_to_update_targets(solv, solv->update_targets->elements + solv->update_targets->elements[p - installed->start], &q);
1882 /* mark all elements in dq that are in the updaters list */
1883 dq->elements[i] = -p;
1884 for (j = 0; j < dq->count; j++)
1885 {
1886 p = dq->elements[j];
1887 if (p < 0)
1888 continue;
1889 for (k = 0; k < q.count; k++)
1890 if (q.elements[k] == p)
1891 {
1892 dq->elements[j] = -p;
1893 break;
1894 }
1895 }
1896 }
1897 /* now prune to marked elements */
1898 for (i = j = 0; i < dq->count; i++)
1899 if ((p = dq->elements[i]) < 0)
1900 dq->elements[j++] = -p;
1901 dq->count = j;
1902 queue_free(&q);
1903 }
1904
1905 static int
resolve_dependencies(Solver * solv,int level,int disablerules,Queue * dq)1906 resolve_dependencies(Solver *solv, int level, int disablerules, Queue *dq)
1907 {
1908 Pool *pool = solv->pool;
1909 int i, j, n;
1910 int postponed;
1911 Rule *r;
1912 int origlevel = level;
1913 Id p, *dp;
1914 int focusbest = solv->focus_best && solv->do_extra_reordering;
1915 Repo *installed = solv->installed;
1916
1917 /*
1918 * decide
1919 */
1920 POOL_DEBUG(SOLV_DEBUG_POLICY, "deciding unresolved rules\n");
1921 postponed = 0;
1922 for (i = 1, n = 1; ; i++, n++)
1923 {
1924 if (n >= solv->nrules)
1925 {
1926 if (postponed <= 0)
1927 break;
1928 i = postponed;
1929 postponed = -1;
1930 n = 1;
1931 }
1932 if (i == solv->nrules)
1933 i = 1;
1934 if (focusbest && i >= solv->featurerules)
1935 continue;
1936 r = solv->rules + i;
1937 if (r->d < 0) /* ignore disabled rules */
1938 continue;
1939 if (r->p < 0) /* most common cases first */
1940 {
1941 if (r->d == 0 || solv->decisionmap[-r->p] <= 0)
1942 continue;
1943 }
1944 if (focusbest && r->d != 0 && installed)
1945 {
1946 /* make sure at least one negative literal is from a new package */
1947 if (!(r->p < 0 && pool->solvables[-r->p].repo != installed))
1948 {
1949 dp = pool->whatprovidesdata + r->d;
1950 while ((p = *dp++) != 0)
1951 if (p < 0 && solv->decisionmap[-p] > 0 && pool->solvables[-p].repo != installed)
1952 break;
1953 if (!p)
1954 continue; /* sorry */
1955 }
1956 }
1957 if (dq->count)
1958 queue_empty(dq);
1959 if (r->d == 0)
1960 {
1961 /* binary or unary rule */
1962 /* need two positive undecided literals, r->p already checked above */
1963 if (r->w2 <= 0)
1964 continue;
1965 if (solv->decisionmap[r->p] || solv->decisionmap[r->w2])
1966 continue;
1967 queue_push(dq, r->p);
1968 queue_push(dq, r->w2);
1969 }
1970 else
1971 {
1972 /* make sure that
1973 * all negative literals are installed
1974 * no positive literal is installed
1975 * i.e. the rule is not fulfilled and we
1976 * just need to decide on the positive literals
1977 * (decisionmap[-r->p] for the r->p < 0 case is already checked above)
1978 */
1979 if (r->p >= 0)
1980 {
1981 if (solv->decisionmap[r->p] > 0)
1982 continue;
1983 if (solv->decisionmap[r->p] == 0)
1984 queue_push(dq, r->p);
1985 }
1986 dp = pool->whatprovidesdata + r->d;
1987 while ((p = *dp++) != 0)
1988 {
1989 if (p < 0)
1990 {
1991 if (solv->decisionmap[-p] <= 0)
1992 break;
1993 }
1994 else
1995 {
1996 if (solv->decisionmap[p] > 0)
1997 break;
1998 if (solv->decisionmap[p] == 0)
1999 queue_push(dq, p);
2000 }
2001 }
2002 if (p)
2003 continue;
2004 }
2005 IF_POOLDEBUG (SOLV_DEBUG_PROPAGATE)
2006 {
2007 POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "unfulfilled ");
2008 solver_printruleclass(solv, SOLV_DEBUG_PROPAGATE, r);
2009 }
2010 /* dq->count < 2 cannot happen as this means that
2011 * the rule is unit */
2012 assert(dq->count > 1);
2013
2014 /* prune to cleandeps packages */
2015 if (solv->cleandepsmap.size && solv->installed)
2016 {
2017 int cleandeps_update = 0;
2018 Repo *installed = solv->installed;
2019 for (j = 0; j < dq->count; j++)
2020 if (pool->solvables[dq->elements[j]].repo == installed && MAPTST(&solv->cleandepsmap, dq->elements[j] - installed->start))
2021 {
2022 if (solv->updatemap_all || (solv->updatemap.size && MAPTST(&solv->updatemap, dq->elements[j] - installed->start)))
2023 {
2024 cleandeps_update = 1; /* cleandeps package is marked for update */
2025 continue;
2026 }
2027 break;
2028 }
2029 if (j < dq->count)
2030 {
2031 dq->elements[0] = dq->elements[j];
2032 queue_truncate(dq, 1);
2033 }
2034 else if (cleandeps_update)
2035 do_cleandeps_update_filter(solv, dq); /* special update filter */
2036 }
2037
2038 if (dq->count > 1 && postponed >= 0)
2039 {
2040 policy_filter_unwanted(solv, dq, POLICY_MODE_CHOOSE_NOREORDER);
2041 if (dq->count > 1)
2042 {
2043 if (!postponed)
2044 postponed = i;
2045 continue;
2046 }
2047 }
2048
2049 level = selectandinstall(solv, level, dq, disablerules, r - solv->rules, SOLVER_REASON_RESOLVE);
2050 if (level < origlevel)
2051 break; /* trouble */
2052 /* something changed, so look at all rules again */
2053 n = 0;
2054 }
2055 return level;
2056 }
2057
2058
2059 #ifdef ENABLE_COMPLEX_DEPS
2060
2061 static void
add_complex_recommends(Solver * solv,Id rec,Queue * dq,Map * dqmap)2062 add_complex_recommends(Solver *solv, Id rec, Queue *dq, Map *dqmap)
2063 {
2064 Pool *pool = solv->pool;
2065 int oldcnt = dq->count;
2066 int cutcnt, blkcnt;
2067 Id p;
2068 int i, j;
2069
2070 #if 0
2071 printf("ADD_COMPLEX_RECOMMENDS %s\n", pool_dep2str(pool, rec));
2072 #endif
2073 i = pool_normalize_complex_dep(pool, rec, dq, CPLXDEPS_EXPAND);
2074 if (i == 0 || i == 1)
2075 return;
2076 cutcnt = dq->count;
2077 for (i = oldcnt; i < cutcnt; i++)
2078 {
2079 blkcnt = dq->count;
2080 for (; (p = dq->elements[i]) != 0; i++)
2081 {
2082 if (p < 0)
2083 {
2084 if (solv->decisionmap[-p] <= 0)
2085 break;
2086 continue;
2087 }
2088 if (solv->decisionmap[p] > 0)
2089 {
2090 queue_truncate(dq, blkcnt);
2091 break;
2092 }
2093 if (solv->decisionmap[p] < 0)
2094 continue;
2095 if (dqmap)
2096 {
2097 if (!MAPTST(dqmap, p))
2098 continue;
2099 }
2100 else
2101 {
2102 if (solv->process_orphans && solv->installed && pool->solvables[p].repo == solv->installed && (solv->droporphanedmap_all || (solv->droporphanedmap.size && MAPTST(&solv->droporphanedmap, p - solv->installed->start))))
2103 continue;
2104 }
2105 queue_push(dq, p);
2106 }
2107 while (dq->elements[i])
2108 i++;
2109 }
2110 queue_deleten(dq, oldcnt, cutcnt - oldcnt);
2111 /* unify */
2112 if (dq->count != oldcnt)
2113 {
2114 for (j = oldcnt; j < dq->count; j++)
2115 {
2116 p = dq->elements[j];
2117 for (i = 0; i < j; i++)
2118 if (dq->elements[i] == p)
2119 {
2120 dq->elements[j] = 0;
2121 break;
2122 }
2123 }
2124 for (i = j = oldcnt; j < dq->count; j++)
2125 if (dq->elements[j])
2126 dq->elements[i++] = dq->elements[j];
2127 queue_truncate(dq, i);
2128 }
2129 #if 0
2130 printf("RETURN:\n");
2131 for (i = oldcnt; i < dq->count; i++)
2132 printf(" - %s\n", pool_solvid2str(pool, dq->elements[i]));
2133 #endif
2134 }
2135
2136 static void
do_complex_recommendations(Solver * solv,Id rec,Map * m,int noselected)2137 do_complex_recommendations(Solver *solv, Id rec, Map *m, int noselected)
2138 {
2139 Pool *pool = solv->pool;
2140 Queue dq;
2141 Id p;
2142 int i, blk;
2143
2144 #if 0
2145 printf("DO_COMPLEX_RECOMMENDATIONS %s\n", pool_dep2str(pool, rec));
2146 #endif
2147 queue_init(&dq);
2148 i = pool_normalize_complex_dep(pool, rec, &dq, CPLXDEPS_EXPAND);
2149 if (i == 0 || i == 1)
2150 {
2151 queue_free(&dq);
2152 return;
2153 }
2154 for (i = 0; i < dq.count; i++)
2155 {
2156 blk = i;
2157 for (; (p = dq.elements[i]) != 0; i++)
2158 {
2159 if (p < 0)
2160 {
2161 if (solv->decisionmap[-p] <= 0)
2162 break;
2163 continue;
2164 }
2165 if (solv->decisionmap[p] > 0)
2166 {
2167 if (noselected)
2168 break;
2169 MAPSET(m, p);
2170 for (i++; (p = dq.elements[i]) != 0; i++)
2171 if (p > 0 && solv->decisionmap[p] > 0)
2172 MAPSET(m, p);
2173 p = 1;
2174 break;
2175 }
2176 }
2177 if (!p)
2178 {
2179 for (i = blk; (p = dq.elements[i]) != 0; i++)
2180 if (p > 0)
2181 MAPSET(m, p);
2182 }
2183 while (dq.elements[i])
2184 i++;
2185 }
2186 queue_free(&dq);
2187 }
2188
2189 #endif
2190
2191 static void
prune_disfavored(Solver * solv,Queue * plist)2192 prune_disfavored(Solver *solv, Queue *plist)
2193 {
2194 int i, j;
2195 for (i = j = 0; i < plist->count; i++)
2196 {
2197 Id p = plist->elements[i];
2198 if (solv->favormap[p] >= 0)
2199 plist->elements[j++] = p;
2200 }
2201 if (i != j)
2202 queue_truncate(plist, j);
2203 }
2204
2205 static int
resolve_weak(Solver * solv,int level,int disablerules,Queue * dq,Queue * dqs,int * rerunp)2206 resolve_weak(Solver *solv, int level, int disablerules, Queue *dq, Queue *dqs, int *rerunp)
2207 {
2208 Pool *pool = solv->pool;
2209 int i, j, qcount;
2210 int olevel;
2211 Solvable *s;
2212 Map dqmap;
2213 int decisioncount;
2214 Id p;
2215
2216 POOL_DEBUG(SOLV_DEBUG_POLICY, "installing recommended packages\n");
2217 if (dq->count)
2218 queue_empty(dq); /* recommended packages */
2219 if (dqs->count)
2220 queue_empty(dqs); /* supplemented packages */
2221 for (i = 1; i < pool->nsolvables; i++)
2222 {
2223 if (solv->decisionmap[i] < 0)
2224 continue;
2225 s = pool->solvables + i;
2226 if (solv->decisionmap[i] > 0)
2227 {
2228 /* installed, check for recommends */
2229 Id *recp, rec, pp, p;
2230 if (!solv->addalreadyrecommended && s->repo == solv->installed)
2231 continue;
2232 if (s->recommends)
2233 {
2234 recp = s->repo->idarraydata + s->recommends;
2235 while ((rec = *recp++) != 0)
2236 {
2237 /* cheat: we just look if there is REL_NAMESPACE in the dep */
2238 if (solv->only_namespace_recommended && !solver_is_namespace_dep(solv, rec))
2239 continue;
2240 #ifdef ENABLE_COMPLEX_DEPS
2241 if (pool_is_complex_dep(pool, rec))
2242 {
2243 add_complex_recommends(solv, rec, dq, 0);
2244 continue;
2245 }
2246 #endif
2247 qcount = dq->count;
2248 FOR_PROVIDES(p, pp, rec)
2249 {
2250 if (solv->decisionmap[p] > 0)
2251 {
2252 dq->count = qcount;
2253 break;
2254 }
2255 else if (solv->decisionmap[p] == 0)
2256 {
2257 if (solv->process_orphans && solv->installed && pool->solvables[p].repo == solv->installed && (solv->droporphanedmap_all || (solv->droporphanedmap.size && MAPTST(&solv->droporphanedmap, p - solv->installed->start))))
2258 continue;
2259 queue_pushunique(dq, p);
2260 }
2261 }
2262 }
2263 }
2264 }
2265 else
2266 {
2267 /* not yet installed, check if supplemented */
2268 if (!s->supplements)
2269 continue;
2270 if (!pool_installable(pool, s))
2271 continue;
2272 if (!solver_is_supplementing(solv, s))
2273 continue;
2274 if (solv->process_orphans && solv->installed && s->repo == solv->installed && (solv->droporphanedmap_all || (solv->droporphanedmap.size && MAPTST(&solv->droporphanedmap, i - solv->installed->start))))
2275 continue;
2276 if (solv->havedisfavored && solv->favormap[i] < 0)
2277 continue; /* disfavored supplements, do not install */
2278 queue_push(dqs, i);
2279 }
2280 }
2281
2282 /* filter out disfavored recommended packages */
2283 if (dq->count && solv->havedisfavored)
2284 prune_disfavored(solv, dq);
2285
2286 /* filter out all packages obsoleted by installed packages */
2287 /* this is no longer needed if we have (and trust) reverse obsoletes */
2288 if ((dqs->count || dq->count) && solv->installed)
2289 {
2290 Map obsmap;
2291 Id obs, *obsp, po, ppo;
2292
2293 map_init(&obsmap, pool->nsolvables);
2294 for (p = solv->installed->start; p < solv->installed->end; p++)
2295 {
2296 s = pool->solvables + p;
2297 if (s->repo != solv->installed || !s->obsoletes)
2298 continue;
2299 if (solv->decisionmap[p] <= 0)
2300 continue;
2301 if (!solv->keepexplicitobsoletes && solv->multiversion.size && MAPTST(&solv->multiversion, p))
2302 continue;
2303 obsp = s->repo->idarraydata + s->obsoletes;
2304 /* foreach obsoletes */
2305 while ((obs = *obsp++) != 0)
2306 FOR_PROVIDES(po, ppo, obs)
2307 {
2308 Solvable *pos = pool->solvables + po;
2309 if (!pool->obsoleteusesprovides && !pool_match_nevr(pool, pos, obs))
2310 continue;
2311 if (pool->obsoleteusescolors && !pool_colormatch(pool, s, pos))
2312 continue;
2313 MAPSET(&obsmap, po);
2314 }
2315 }
2316 for (i = j = 0; i < dqs->count; i++)
2317 if (!MAPTST(&obsmap, dqs->elements[i]))
2318 dqs->elements[j++] = dqs->elements[i];
2319 dqs->count = j;
2320 for (i = j = 0; i < dq->count; i++)
2321 if (!MAPTST(&obsmap, dq->elements[i]))
2322 dq->elements[j++] = dq->elements[i];
2323 dq->count = j;
2324 map_free(&obsmap);
2325 }
2326
2327 /* filter out all already supplemented packages if requested */
2328 if ((!solv->addalreadyrecommended || solv->only_namespace_recommended) && dqs->count)
2329 {
2330 /* filter out old supplements */
2331 for (i = j = 0; i < dqs->count; i++)
2332 {
2333 p = dqs->elements[i];
2334 s = pool->solvables + p;
2335 if (s->supplements && solver_is_supplementing_alreadyinstalled(solv, s))
2336 dqs->elements[j++] = p;
2337 }
2338 dqs->count = j;
2339 }
2340
2341 /* multiversion doesn't mix well with supplements.
2342 * filter supplemented packages where we already decided
2343 * to install a different version (see bnc#501088) */
2344 if (dqs->count && solv->multiversion.size)
2345 {
2346 for (i = j = 0; i < dqs->count; i++)
2347 {
2348 p = dqs->elements[i];
2349 if (MAPTST(&solv->multiversion, p))
2350 {
2351 Id p2, pp2;
2352 s = pool->solvables + p;
2353 FOR_PROVIDES(p2, pp2, s->name)
2354 if (solv->decisionmap[p2] > 0 && pool->solvables[p2].name == s->name)
2355 break;
2356 if (p2)
2357 continue; /* ignore this package */
2358 }
2359 dqs->elements[j++] = p;
2360 }
2361 dqs->count = j;
2362 }
2363
2364 /* implicitobsoleteusescolors doesn't mix well with supplements.
2365 * filter supplemented packages where we already decided
2366 * to install a different architecture */
2367 if (dqs->count && pool->implicitobsoleteusescolors)
2368 {
2369 for (i = j = 0; i < dqs->count; i++)
2370 {
2371 Id p2, pp2;
2372 p = dqs->elements[i];
2373 s = pool->solvables + p;
2374 FOR_PROVIDES(p2, pp2, s->name)
2375 if (solv->decisionmap[p2] > 0 && pool->solvables[p2].name == s->name && pool->solvables[p2].arch != s->arch)
2376 break;
2377 if (p2)
2378 continue; /* ignore this package */
2379 dqs->elements[j++] = p;
2380 }
2381 dqs->count = j;
2382 }
2383
2384 /* make dq contain both recommended and supplemented pkgs */
2385 if (dqs->count)
2386 {
2387 for (i = 0; i < dqs->count; i++)
2388 queue_pushunique(dq, dqs->elements[i]);
2389 }
2390
2391 if (!dq->count)
2392 return level;
2393 *rerunp = 1;
2394
2395 if (dq->count == 1)
2396 {
2397 /* simple case, just one package. no need to choose to best version */
2398 p = dq->elements[0];
2399 if (dqs->count)
2400 POOL_DEBUG(SOLV_DEBUG_POLICY, "installing supplemented %s\n", pool_solvid2str(pool, p));
2401 else
2402 POOL_DEBUG(SOLV_DEBUG_POLICY, "installing recommended %s\n", pool_solvid2str(pool, p));
2403 return setpropagatelearn(solv, level, p, 0, 0, SOLVER_REASON_WEAKDEP);
2404 }
2405
2406 /* filter packages, this gives us the best versions */
2407 policy_filter_unwanted(solv, dq, POLICY_MODE_RECOMMEND);
2408
2409 /* create map of result */
2410 map_init(&dqmap, pool->nsolvables);
2411 for (i = 0; i < dq->count; i++)
2412 MAPSET(&dqmap, dq->elements[i]);
2413
2414 /* prune dqs so that it only contains the best versions */
2415 for (i = j = 0; i < dqs->count; i++)
2416 {
2417 p = dqs->elements[i];
2418 if (MAPTST(&dqmap, p))
2419 dqs->elements[j++] = p;
2420 }
2421 dqs->count = j;
2422
2423 /* install all supplemented packages, but order first */
2424 if (dqs->count > 1)
2425 policy_filter_unwanted(solv, dqs, POLICY_MODE_SUPPLEMENT);
2426 decisioncount = solv->decisionq.count;
2427 for (i = 0; i < dqs->count; i++)
2428 {
2429 p = dqs->elements[i];
2430 if (solv->decisionmap[p])
2431 continue;
2432 POOL_DEBUG(SOLV_DEBUG_POLICY, "installing supplemented %s\n", pool_solvid2str(pool, p));
2433 olevel = level;
2434 level = setpropagatelearn(solv, level, p, 0, 0, SOLVER_REASON_WEAKDEP);
2435 if (level <= olevel)
2436 break;
2437 }
2438 if (i < dqs->count || solv->decisionq.count < decisioncount)
2439 {
2440 map_free(&dqmap);
2441 return level;
2442 }
2443
2444 /* install all recommended packages */
2445 /* more work as we want to created branches if multiple
2446 * choices are valid */
2447 for (i = 0; i < decisioncount; i++)
2448 {
2449 Id rec, *recp, pp;
2450 p = solv->decisionq.elements[i];
2451 if (p < 0)
2452 continue;
2453 s = pool->solvables + p;
2454 if (!s->repo || (!solv->addalreadyrecommended && s->repo == solv->installed))
2455 continue;
2456 if (!s->recommends)
2457 continue;
2458 recp = s->repo->idarraydata + s->recommends;
2459 while ((rec = *recp++) != 0)
2460 {
2461 queue_empty(dq);
2462 #ifdef ENABLE_COMPLEX_DEPS
2463 if (pool_is_complex_dep(pool, rec))
2464 add_complex_recommends(solv, rec, dq, &dqmap);
2465 else
2466 #endif
2467 FOR_PROVIDES(p, pp, rec)
2468 {
2469 if (solv->decisionmap[p] > 0)
2470 {
2471 dq->count = 0;
2472 break;
2473 }
2474 else if (solv->decisionmap[p] == 0 && MAPTST(&dqmap, p))
2475 queue_push(dq, p);
2476 }
2477 if (!dq->count)
2478 continue;
2479 if (dq->count > 1)
2480 policy_filter_unwanted(solv, dq, POLICY_MODE_CHOOSE);
2481 /* if we have multiple candidates we open a branch */
2482 if (dq->count > 1)
2483 createbranch(solv, level, dq, s - pool->solvables, rec);
2484 p = dq->elements[0];
2485 POOL_DEBUG(SOLV_DEBUG_POLICY, "installing recommended %s\n", pool_solvid2str(pool, p));
2486 olevel = level;
2487 level = setpropagatelearn(solv, level, p, 0, 0, SOLVER_REASON_WEAKDEP);
2488 if (level <= olevel || solv->decisionq.count < decisioncount)
2489 break; /* we had to revert some decisions */
2490 }
2491 if (rec)
2492 break; /* had a problem above, quit loop */
2493 }
2494 map_free(&dqmap);
2495 return level;
2496 }
2497
2498 static int
resolve_cleandeps(Solver * solv,int level,int disablerules,int * rerunp)2499 resolve_cleandeps(Solver *solv, int level, int disablerules, int *rerunp)
2500 {
2501 Pool *pool = solv->pool;
2502 Repo *installed = solv->installed;
2503 int olevel;
2504 Id p;
2505 Solvable *s;
2506
2507 if (!installed || !solv->cleandepsmap.size)
2508 return level;
2509 POOL_DEBUG(SOLV_DEBUG_SOLVER, "deciding cleandeps packages\n");
2510 for (p = installed->start; p < installed->end; p++)
2511 {
2512 s = pool->solvables + p;
2513 if (s->repo != installed)
2514 continue;
2515 if (solv->decisionmap[p] != 0 || !MAPTST(&solv->cleandepsmap, p - installed->start))
2516 continue;
2517 POOL_DEBUG(SOLV_DEBUG_POLICY, "cleandeps erasing %s\n", pool_solvid2str(pool, p));
2518 olevel = level;
2519 level = setpropagatelearn(solv, level, -p, 0, 0, SOLVER_REASON_CLEANDEPS_ERASE);
2520 if (level < olevel)
2521 break;
2522 }
2523 if (p < installed->end)
2524 *rerunp = 1;
2525 return level;
2526 }
2527
2528 static int
resolve_orphaned(Solver * solv,int level,int disablerules,Queue * dq,int * rerunp)2529 resolve_orphaned(Solver *solv, int level, int disablerules, Queue *dq, int *rerunp)
2530 {
2531 Pool *pool = solv->pool;
2532 int i;
2533 Id p;
2534 int installedone = 0;
2535 int olevel;
2536
2537 /* let's see if we can install some unsupported package */
2538 POOL_DEBUG(SOLV_DEBUG_SOLVER, "deciding orphaned packages\n");
2539 for (i = 0; i < solv->orphaned.count; i++)
2540 {
2541 p = solv->orphaned.elements[i];
2542 if (solv->decisionmap[p])
2543 continue; /* already decided */
2544 if (solv->droporphanedmap_all)
2545 continue;
2546 if (solv->droporphanedmap.size && MAPTST(&solv->droporphanedmap, p - solv->installed->start))
2547 continue;
2548 POOL_DEBUG(SOLV_DEBUG_SOLVER, "keeping orphaned %s\n", pool_solvid2str(pool, p));
2549 olevel = level;
2550 level = setpropagatelearn(solv, level, p, 0, 0, SOLVER_REASON_RESOLVE_ORPHAN);
2551 installedone = 1;
2552 if (level < olevel)
2553 break;
2554 }
2555 if (installedone || i < solv->orphaned.count)
2556 {
2557 *rerunp = 1;
2558 return level;
2559 }
2560 for (i = 0; i < solv->orphaned.count; i++)
2561 {
2562 p = solv->orphaned.elements[i];
2563 if (solv->decisionmap[p])
2564 continue; /* already decided */
2565 POOL_DEBUG(SOLV_DEBUG_SOLVER, "removing orphaned %s\n", pool_solvid2str(pool, p));
2566 olevel = level;
2567 level = setpropagatelearn(solv, level, -p, 0, 0, SOLVER_REASON_RESOLVE_ORPHAN);
2568 if (level < olevel)
2569 {
2570 *rerunp = 1;
2571 return level;
2572 }
2573 }
2574 if (solv->brokenorphanrules)
2575 {
2576 solver_check_brokenorphanrules(solv, dq);
2577 if (dq->count)
2578 {
2579 policy_filter_unwanted(solv, dq, POLICY_MODE_CHOOSE);
2580 for (i = 0; i < dq->count; i++)
2581 {
2582 p = dq->elements[i];
2583 POOL_DEBUG(SOLV_DEBUG_POLICY, "installing orphaned dep %s\n", pool_solvid2str(pool, p));
2584 olevel = level;
2585 level = setpropagatelearn(solv, level, p, 0, 0, SOLVER_REASON_RESOLVE_ORPHAN);
2586 if (level < olevel)
2587 break;
2588 }
2589 *rerunp = 1;
2590 return level;
2591 }
2592 }
2593 return level;
2594 }
2595
2596 /*-------------------------------------------------------------------
2597 *
2598 * solver_run_sat
2599 *
2600 * all rules have been set up, now actually run the solver
2601 *
2602 */
2603
2604 void
solver_run_sat(Solver * solv,int disablerules,int doweak)2605 solver_run_sat(Solver *solv, int disablerules, int doweak)
2606 {
2607 Queue dq; /* local decisionqueue */
2608 Queue dqs; /* local decisionqueue for supplements */
2609 int systemlevel;
2610 int level, olevel;
2611 Rule *r;
2612 int i;
2613 Solvable *s;
2614 Pool *pool = solv->pool;
2615 Id p;
2616 int minimizationsteps;
2617
2618 IF_POOLDEBUG (SOLV_DEBUG_RULE_CREATION)
2619 {
2620 POOL_DEBUG (SOLV_DEBUG_RULE_CREATION, "number of rules: %d\n", solv->nrules);
2621 for (i = 1; i < solv->nrules; i++)
2622 solver_printruleclass(solv, SOLV_DEBUG_RULE_CREATION, solv->rules + i);
2623 }
2624
2625 /* start SAT algorithm */
2626 level = 0;
2627 systemlevel = level + 1;
2628 POOL_DEBUG(SOLV_DEBUG_SOLVER, "solving...\n");
2629
2630 queue_init(&dq);
2631 queue_init(&dqs);
2632 solv->installedpos = 0;
2633 solv->do_extra_reordering = 0;
2634
2635 /*
2636 * here's the main loop:
2637 * 1) decide assertion rules and propagate
2638 * 2) fulfill jobs
2639 * 3) try to keep installed packages
2640 * 4) fulfill all unresolved rules
2641 * 5) install recommended packages
2642 * 6) minimalize solution if we had choices
2643 * if we encounter a problem, we rewind to a safe level and restart
2644 * with step 1
2645 */
2646
2647 minimizationsteps = 0;
2648 for (;;)
2649 {
2650 /*
2651 * initial propagation of the assertions
2652 */
2653 if (level <= 0)
2654 {
2655 if (level < 0)
2656 break;
2657 level = makeruledecisions(solv, disablerules);
2658 if (level < 0)
2659 break;
2660 POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "initial propagate (propagate_index: %d; size decisionq: %d)...\n", solv->propagate_index, solv->decisionq.count);
2661 if ((r = propagate(solv, level)) != 0)
2662 {
2663 level = analyze_unsolvable(solv, r, disablerules);
2664 continue;
2665 }
2666 systemlevel = level + 1;
2667 }
2668
2669 /*
2670 * resolve jobs first (unless focus_installed is set)
2671 */
2672 if (level < systemlevel && !solv->focus_installed)
2673 {
2674 if (solv->installed && solv->installed->nsolvables && !solv->installed->disabled)
2675 solv->do_extra_reordering = 1;
2676 olevel = level;
2677 level = resolve_jobrules(solv, level, disablerules, &dq);
2678 solv->do_extra_reordering = 0;
2679 if (level < olevel)
2680 continue;
2681 systemlevel = level + 1;
2682 }
2683
2684 /* resolve job dependencies in the focus_best case */
2685 if (level < systemlevel && solv->focus_best && !solv->focus_installed && solv->installed && solv->installed->nsolvables && !solv->installed->disabled)
2686 {
2687 solv->do_extra_reordering = 1;
2688 olevel = level;
2689 level = resolve_dependencies(solv, level, disablerules, &dq);
2690 solv->do_extra_reordering = 0;
2691 if (level < olevel)
2692 continue; /* start over */
2693 systemlevel = level + 1;
2694 }
2695
2696 /*
2697 * installed packages
2698 */
2699 if (level < systemlevel && solv->installed && solv->installed->nsolvables && !solv->installed->disabled)
2700 {
2701 olevel = level;
2702 level = resolve_installed(solv, level, disablerules, &dq);
2703 if (level < olevel)
2704 continue;
2705 systemlevel = level + 1;
2706 }
2707
2708 /* resolve jobs in focus_installed case */
2709 if (level < systemlevel && solv->focus_installed)
2710 {
2711 olevel = level;
2712 level = resolve_jobrules(solv, level, disablerules, &dq);
2713 if (level < olevel)
2714 continue;
2715 systemlevel = level + 1;
2716 }
2717
2718 if (level < systemlevel)
2719 systemlevel = level;
2720
2721 /* resolve all dependencies */
2722 olevel = level;
2723 level = resolve_dependencies(solv, level, disablerules, &dq);
2724 if (level < olevel)
2725 continue; /* start over */
2726
2727 /* decide leftover cleandeps packages */
2728 if (solv->cleandepsmap.size && solv->installed)
2729 {
2730 int rerun = 0;
2731 level = resolve_cleandeps(solv, level, disablerules, &rerun);
2732 if (rerun)
2733 continue;
2734 }
2735
2736 /* at this point we have a consistent system. now do the extras... */
2737
2738 if (doweak)
2739 {
2740 int rerun = 0;
2741 level = resolve_weak(solv, level, disablerules, &dq, &dqs, &rerun);
2742 if (rerun)
2743 continue;
2744 }
2745
2746 if (solv->installed && (solv->orphaned.count || solv->brokenorphanrules))
2747 {
2748 int rerun = 0;
2749 level = resolve_orphaned(solv, level, disablerules, &dq, &rerun);
2750 if (rerun)
2751 continue;
2752 }
2753
2754 /* one final pass to make sure we decided all installed packages */
2755 if (solv->installed)
2756 {
2757 for (p = solv->installed->start; p < solv->installed->end; p++)
2758 {
2759 if (solv->decisionmap[p])
2760 continue; /* already decided */
2761 s = pool->solvables + p;
2762 if (s->repo != solv->installed)
2763 continue;
2764 POOL_DEBUG(SOLV_DEBUG_SOLVER, "removing unwanted %s\n", pool_solvid2str(pool, p));
2765 olevel = level;
2766 level = setpropagatelearn(solv, level, -p, 0, 0, SOLVER_REASON_CLEANDEPS_ERASE);
2767 if (level < olevel)
2768 break;
2769 }
2770 if (p < solv->installed->end)
2771 continue; /* back to main loop */
2772 }
2773
2774 if (solv->installed && solv->cleandepsmap.size && solver_check_cleandeps_mistakes(solv))
2775 {
2776 solver_reset(solv);
2777 level = 0; /* restart from scratch */
2778 continue;
2779 }
2780
2781 if (solv->solution_callback)
2782 {
2783 solv->solution_callback(solv, solv->solution_callback_data);
2784 if (solv->branches.count)
2785 {
2786 int l, endi = 0;
2787 p = l = 0;
2788 for (i = solv->branches.count - 1; i >= 0; i--)
2789 {
2790 p = solv->branches.elements[i];
2791 if (p > 0 && !l)
2792 {
2793 endi = i + 1;
2794 l = p;
2795 i -= 3; /* skip: p data count */
2796 }
2797 else if (p > 0)
2798 break;
2799 else if (p < 0)
2800 l = 0;
2801 }
2802 if (i >= 0)
2803 {
2804 while (i > 0 && solv->branches.elements[i - 1] > 0)
2805 i--;
2806 level = takebranch(solv, i, endi, "branching", disablerules);
2807 continue;
2808 }
2809 }
2810 /* all branches done, we're finally finished */
2811 break;
2812 }
2813
2814 /* auto-minimization step */
2815 if (solv->branches.count)
2816 {
2817 int endi, lasti = -1, lastiend = -1;
2818 if (solv->recommends_index < solv->decisionq.count)
2819 policy_update_recommendsmap(solv);
2820 for (endi = solv->branches.count; endi > 0;)
2821 {
2822 int l, lastsi = -1, starti = endi - solv->branches.elements[endi - 2];
2823 l = solv->branches.elements[endi - 1];
2824 for (i = starti; i < endi - 4; i++)
2825 {
2826 p = solv->branches.elements[i];
2827 if (p <= 0)
2828 continue;
2829 if (solv->decisionmap[p] > l)
2830 {
2831 lasti = i;
2832 lastiend = endi;
2833 lastsi = -1;
2834 break;
2835 }
2836 if (solv->havedisfavored && solv->favormap[p] < 0)
2837 continue;
2838 if (lastsi < 0 && (MAPTST(&solv->recommendsmap, p) || solver_is_supplementing(solv, pool->solvables + p)))
2839 lastsi = i;
2840 }
2841 if (lastsi >= 0)
2842 {
2843 /* we have a recommended package that could not be installed */
2844 /* find current selection and take new one if it is not recommended */
2845 for (i = starti; i < endi - 4; i++)
2846 {
2847 p = -solv->branches.elements[i];
2848 if (p <= 0 || solv->decisionmap[p] != l + 1)
2849 continue;
2850 if (solv->favormap && solv->favormap[p] > solv->favormap[solv->branches.elements[lastsi]])
2851 continue; /* current selection is more favored */
2852 if (!(MAPTST(&solv->recommendsmap, p) || solver_is_supplementing(solv, pool->solvables + p)))
2853 {
2854 lasti = lastsi;
2855 lastiend = endi;
2856 break;
2857 }
2858 }
2859 }
2860 endi = starti;
2861 }
2862 if (lasti >= 0)
2863 {
2864 minimizationsteps++;
2865 level = takebranch(solv, lasti, lastiend, "minimizing", disablerules);
2866 continue; /* back to main loop */
2867 }
2868 }
2869 /* no minimization found, we're finally finished! */
2870 break;
2871 }
2872 assert(level == -1 || level + 1 == solv->decisionq_reason.count);
2873
2874 POOL_DEBUG(SOLV_DEBUG_STATS, "solver statistics: %d learned rules, %d unsolvable, %d minimization steps\n", solv->stats_learned, solv->stats_unsolvable, minimizationsteps);
2875
2876 POOL_DEBUG(SOLV_DEBUG_STATS, "done solving.\n\n");
2877 queue_free(&dq);
2878 queue_free(&dqs);
2879 #if 0
2880 solver_printdecisionq(solv, SOLV_DEBUG_RESULT);
2881 #endif
2882 }
2883
2884
2885 /*-------------------------------------------------------------------
2886 *
2887 * remove disabled conflicts
2888 *
2889 * purpose: update the decisionmap after some rules were disabled.
2890 * this is used to calculate the suggested/recommended package list.
2891 * Also returns a "removed" list to undo the discisionmap changes.
2892 */
2893
2894 static void
removedisabledconflicts(Solver * solv,Queue * removed)2895 removedisabledconflicts(Solver *solv, Queue *removed)
2896 {
2897 Pool *pool = solv->pool;
2898 int i, n;
2899 Id p, why, *dp;
2900 Id new;
2901 Rule *r;
2902 Id *decisionmap = solv->decisionmap;
2903
2904 queue_empty(removed);
2905 for (i = 0; i < solv->decisionq.count; i++)
2906 {
2907 p = solv->decisionq.elements[i];
2908 if (p > 0)
2909 continue; /* conflicts only, please */
2910 why = solv->decisionq_why.elements[i];
2911 if (why == 0)
2912 {
2913 /* no rule involved, must be a orphan package drop */
2914 continue;
2915 }
2916 /* we never do conflicts on free decisions, so there
2917 * must have been an unit rule */
2918 assert(why > 0);
2919 r = solv->rules + why;
2920 if (r->d < 0 && decisionmap[-p])
2921 {
2922 /* rule is now disabled, remove from decisionmap */
2923 POOL_DEBUG(SOLV_DEBUG_SOLVER, "removing conflict for package %s[%d]\n", pool_solvid2str(pool, -p), -p);
2924 queue_push(removed, -p);
2925 queue_push(removed, decisionmap[-p]);
2926 decisionmap[-p] = 0;
2927 }
2928 }
2929 if (!removed->count)
2930 return;
2931 /* we removed some confliced packages. some of them might still
2932 * be in conflict, so search for unit rules and re-conflict */
2933 new = 0;
2934 for (i = n = 1, r = solv->rules + i; n < solv->nrules; i++, r++, n++)
2935 {
2936 if (i == solv->nrules)
2937 {
2938 i = 1;
2939 r = solv->rules + i;
2940 }
2941 if (r->d < 0)
2942 continue;
2943 if (!r->w2)
2944 {
2945 if (r->p < 0 && !decisionmap[-r->p])
2946 new = r->p;
2947 }
2948 else if (!r->d)
2949 {
2950 /* binary rule */
2951 if (r->p < 0 && decisionmap[-r->p] == 0 && DECISIONMAP_FALSE(r->w2))
2952 new = r->p;
2953 else if (r->w2 < 0 && decisionmap[-r->w2] == 0 && DECISIONMAP_FALSE(r->p))
2954 new = r->w2;
2955 }
2956 else
2957 {
2958 if (r->p < 0 && decisionmap[-r->p] == 0)
2959 new = r->p;
2960 if (new || DECISIONMAP_FALSE(r->p))
2961 {
2962 dp = pool->whatprovidesdata + r->d;
2963 while ((p = *dp++) != 0)
2964 {
2965 if (new && p == new)
2966 continue;
2967 if (p < 0 && decisionmap[-p] == 0)
2968 {
2969 if (new)
2970 {
2971 new = 0;
2972 break;
2973 }
2974 new = p;
2975 }
2976 else if (!DECISIONMAP_FALSE(p))
2977 {
2978 new = 0;
2979 break;
2980 }
2981 }
2982 }
2983 }
2984 if (new)
2985 {
2986 POOL_DEBUG(SOLV_DEBUG_SOLVER, "re-conflicting package %s[%d]\n", pool_solvid2str(pool, -new), -new);
2987 decisionmap[-new] = -1;
2988 new = 0;
2989 n = 0; /* redo all rules */
2990 }
2991 }
2992 }
2993
2994 static inline void
undo_removedisabledconflicts(Solver * solv,Queue * removed)2995 undo_removedisabledconflicts(Solver *solv, Queue *removed)
2996 {
2997 int i;
2998 for (i = 0; i < removed->count; i += 2)
2999 solv->decisionmap[removed->elements[i]] = removed->elements[i + 1];
3000 }
3001
3002
3003 /*-------------------------------------------------------------------
3004 *
3005 * weaken solvable dependencies
3006 */
3007
3008 static void
weaken_solvable_deps(Solver * solv,Id p)3009 weaken_solvable_deps(Solver *solv, Id p)
3010 {
3011 int i;
3012 Rule *r;
3013
3014 for (i = 1, r = solv->rules + i; i < solv->pkgrules_end; i++, r++)
3015 {
3016 if (r->p != -p)
3017 continue;
3018 if ((r->d == 0 || r->d == -1) && r->w2 < 0)
3019 continue; /* conflict */
3020 queue_push(&solv->weakruleq, i);
3021 }
3022 }
3023
3024
3025 /********************************************************************/
3026 /* main() */
3027
3028
3029 void
solver_calculate_multiversionmap(Pool * pool,Queue * job,Map * multiversionmap)3030 solver_calculate_multiversionmap(Pool *pool, Queue *job, Map *multiversionmap)
3031 {
3032 int i;
3033 Id how, what, select;
3034 Id p, pp;
3035 for (i = 0; i < job->count; i += 2)
3036 {
3037 how = job->elements[i];
3038 if ((how & SOLVER_JOBMASK) != SOLVER_MULTIVERSION)
3039 continue;
3040 what = job->elements[i + 1];
3041 select = how & SOLVER_SELECTMASK;
3042 if (!multiversionmap->size)
3043 map_grow(multiversionmap, pool->nsolvables);
3044 if (select == SOLVER_SOLVABLE_ALL)
3045 {
3046 FOR_POOL_SOLVABLES(p)
3047 MAPSET(multiversionmap, p);
3048 }
3049 else if (select == SOLVER_SOLVABLE_REPO)
3050 {
3051 Solvable *s;
3052 Repo *repo = pool_id2repo(pool, what);
3053 if (repo)
3054 {
3055 FOR_REPO_SOLVABLES(repo, p, s)
3056 MAPSET(multiversionmap, p);
3057 }
3058 }
3059 FOR_JOB_SELECT(p, pp, select, what)
3060 MAPSET(multiversionmap, p);
3061 }
3062 }
3063
3064 void
solver_calculate_noobsmap(Pool * pool,Queue * job,Map * multiversionmap)3065 solver_calculate_noobsmap(Pool *pool, Queue *job, Map *multiversionmap)
3066 {
3067 solver_calculate_multiversionmap(pool, job, multiversionmap);
3068 }
3069
3070 /*
3071 * add a rule created by a job, record job number and weak flag
3072 */
3073 static inline void
solver_addjobrule(Solver * solv,Id p,Id p2,Id d,Id job,int weak)3074 solver_addjobrule(Solver *solv, Id p, Id p2, Id d, Id job, int weak)
3075 {
3076 solver_addrule(solv, p, p2, d);
3077 queue_push(&solv->ruletojob, job);
3078 if (weak)
3079 queue_push(&solv->weakruleq, solv->nrules - 1);
3080 }
3081
3082 static inline void
add_cleandeps_updatepkg(Solver * solv,Id p)3083 add_cleandeps_updatepkg(Solver *solv, Id p)
3084 {
3085 if (!solv->cleandeps_updatepkgs)
3086 {
3087 solv->cleandeps_updatepkgs = solv_calloc(1, sizeof(Queue));
3088 queue_init(solv->cleandeps_updatepkgs);
3089 }
3090 queue_pushunique(solv->cleandeps_updatepkgs, p);
3091 }
3092
3093 static void
add_update_target(Solver * solv,Id p,Id how)3094 add_update_target(Solver *solv, Id p, Id how)
3095 {
3096 Pool *pool = solv->pool;
3097 Solvable *s = pool->solvables + p;
3098 Repo *installed = solv->installed;
3099 Id pi, pip, identicalp;
3100 int startcnt, endcnt;
3101
3102 if (!solv->update_targets)
3103 {
3104 solv->update_targets = solv_calloc(1, sizeof(Queue));
3105 queue_init(solv->update_targets);
3106 }
3107 if (s->repo == installed)
3108 {
3109 queue_push2(solv->update_targets, p, p);
3110 FOR_PROVIDES(pi, pip, s->name)
3111 {
3112 Solvable *si = pool->solvables + pi;
3113 if (si->repo == installed && si->name == s->name && pi != p)
3114 queue_push2(solv->update_targets, pi, p);
3115 }
3116 return;
3117 }
3118 identicalp = 0;
3119 startcnt = solv->update_targets->count;
3120 FOR_PROVIDES(pi, pip, s->name)
3121 {
3122 Solvable *si = pool->solvables + pi;
3123 if (si->repo != installed || si->name != s->name)
3124 continue;
3125 if (how & SOLVER_FORCEBEST)
3126 {
3127 if (!solv->bestupdatemap.size)
3128 map_grow(&solv->bestupdatemap, installed->end - installed->start);
3129 MAPSET(&solv->bestupdatemap, pi - installed->start);
3130 }
3131 if (how & SOLVER_CLEANDEPS)
3132 add_cleandeps_updatepkg(solv, pi);
3133 queue_push2(solv->update_targets, pi, p);
3134 /* remember an installed package that is identical to p */
3135 if (s->evr == si->evr && solvable_identical(s, si))
3136 identicalp = pi;
3137 }
3138 if (s->obsoletes)
3139 {
3140 Id obs, *obsp = s->repo->idarraydata + s->obsoletes;
3141 while ((obs = *obsp++) != 0)
3142 {
3143 FOR_PROVIDES(pi, pip, obs)
3144 {
3145 Solvable *si = pool->solvables + pi;
3146 if (si->repo != installed)
3147 continue;
3148 if (si->name == s->name)
3149 continue; /* already handled above */
3150 if (!pool->obsoleteusesprovides && !pool_match_nevr(pool, si, obs))
3151 continue;
3152 if (pool->obsoleteusescolors && !pool_colormatch(pool, s, si))
3153 continue;
3154 if (how & SOLVER_FORCEBEST)
3155 {
3156 if (!solv->bestupdatemap.size)
3157 map_grow(&solv->bestupdatemap, installed->end - installed->start);
3158 MAPSET(&solv->bestupdatemap, pi - installed->start);
3159 }
3160 if (how & SOLVER_CLEANDEPS)
3161 add_cleandeps_updatepkg(solv, pi);
3162 queue_push2(solv->update_targets, pi, p);
3163 }
3164 }
3165 }
3166 /* also allow upgrading to an identical installed package */
3167 if (identicalp)
3168 {
3169 for (endcnt = solv->update_targets->count; startcnt < endcnt; startcnt += 2)
3170 queue_push2(solv->update_targets, solv->update_targets->elements[startcnt], identicalp);
3171 }
3172 }
3173
3174 static int
transform_update_targets_sortfn(const void * ap,const void * bp,void * dp)3175 transform_update_targets_sortfn(const void *ap, const void *bp, void *dp)
3176 {
3177 const Id *a = ap;
3178 const Id *b = bp;
3179 if (a[0] - b[0])
3180 return a[0] - b[0];
3181 return a[1] - b[1];
3182 }
3183
3184 static void
transform_update_targets(Solver * solv)3185 transform_update_targets(Solver *solv)
3186 {
3187 Repo *installed = solv->installed;
3188 Queue *update_targets = solv->update_targets;
3189 int i, j;
3190 Id p, q, lastp, lastq;
3191
3192 if (!update_targets->count)
3193 {
3194 queue_free(update_targets);
3195 solv->update_targets = solv_free(update_targets);
3196 return;
3197 }
3198 if (update_targets->count > 2)
3199 solv_sort(update_targets->elements, update_targets->count >> 1, 2 * sizeof(Id), transform_update_targets_sortfn, solv);
3200 queue_insertn(update_targets, 0, installed->end - installed->start, 0);
3201 lastp = lastq = 0;
3202 for (i = j = installed->end - installed->start; i < update_targets->count; i += 2)
3203 {
3204 if ((p = update_targets->elements[i]) != lastp)
3205 {
3206 if (!solv->updatemap.size)
3207 map_grow(&solv->updatemap, installed->end - installed->start);
3208 MAPSET(&solv->updatemap, p - installed->start);
3209 update_targets->elements[j++] = 0; /* finish old set */
3210 update_targets->elements[p - installed->start] = j; /* start new set */
3211 lastp = p;
3212 lastq = 0;
3213 }
3214 if ((q = update_targets->elements[i + 1]) != lastq)
3215 {
3216 update_targets->elements[j++] = q;
3217 lastq = q;
3218 }
3219 }
3220 queue_truncate(update_targets, j);
3221 queue_push(update_targets, 0); /* finish last set */
3222 }
3223
3224
3225 static void
addedmap2deduceq(Solver * solv,Map * addedmap)3226 addedmap2deduceq(Solver *solv, Map *addedmap)
3227 {
3228 Pool *pool = solv->pool;
3229 int i, j;
3230 Id p;
3231 Rule *r;
3232
3233 queue_empty(&solv->addedmap_deduceq);
3234 for (i = 2, j = solv->pkgrules_end - 1; i < pool->nsolvables && j > 0; j--)
3235 {
3236 r = solv->rules + j;
3237 if (r->p >= 0)
3238 continue;
3239 if ((r->d == 0 || r->d == -1) && r->w2 < 0)
3240 continue;
3241 p = -r->p;
3242 if (!MAPTST(addedmap, p))
3243 {
3244 /* this can happen with complex dependencies that have more than one pos literal */
3245 if (!solv->addedmap_deduceq.count || solv->addedmap_deduceq.elements[solv->addedmap_deduceq.count - 1] != -p)
3246 queue_push(&solv->addedmap_deduceq, -p);
3247 continue;
3248 }
3249 for (; i < p; i++)
3250 if (MAPTST(addedmap, i))
3251 queue_push(&solv->addedmap_deduceq, i);
3252 if (i == p)
3253 i++;
3254 }
3255 for (; i < pool->nsolvables; i++)
3256 if (MAPTST(addedmap, i))
3257 queue_push(&solv->addedmap_deduceq, i);
3258 }
3259
3260 static void
deduceq2addedmap(Solver * solv,Map * addedmap)3261 deduceq2addedmap(Solver *solv, Map *addedmap)
3262 {
3263 int j;
3264 Id p;
3265 Rule *r;
3266 for (j = solv->pkgrules_end - 1; j > 0; j--)
3267 {
3268 r = solv->rules + j;
3269 if (r->d < 0 && r->p)
3270 solver_enablerule(solv, r);
3271 if (r->p >= 0)
3272 continue;
3273 if ((r->d == 0 || r->d == -1) && r->w2 < 0)
3274 continue;
3275 p = -r->p;
3276 MAPSET(addedmap, p);
3277 }
3278 for (j = 0; j < solv->addedmap_deduceq.count; j++)
3279 {
3280 p = solv->addedmap_deduceq.elements[j];
3281 if (p > 0)
3282 MAPSET(addedmap, p);
3283 else
3284 MAPCLR(addedmap, -p);
3285 }
3286 }
3287
3288 #ifdef ENABLE_COMPLEX_DEPS
3289 static int
add_complex_jobrules(Solver * solv,Id dep,int flags,int jobidx,int weak)3290 add_complex_jobrules(Solver *solv, Id dep, int flags, int jobidx, int weak)
3291 {
3292 Pool *pool = solv->pool;
3293 Queue bq;
3294 int i, j;
3295
3296 queue_init(&bq);
3297 i = pool_normalize_complex_dep(pool, dep, &bq, flags | CPLXDEPS_EXPAND);
3298 if (i == 0 || i == 1)
3299 {
3300 queue_free(&bq);
3301 if (i == 0)
3302 solver_addjobrule(solv, -SYSTEMSOLVABLE, 0, 0, jobidx, weak);
3303 return 0;
3304 }
3305 for (i = 0; i < bq.count; i++)
3306 {
3307 if (!bq.elements[i])
3308 continue;
3309 for (j = 0; bq.elements[i + j + 1]; j++)
3310 ;
3311 if (j > 1)
3312 solver_addjobrule(solv, bq.elements[i], 0, pool_ids2whatprovides(pool, bq.elements + i + 1, j), jobidx, weak);
3313 else
3314 solver_addjobrule(solv, bq.elements[i], bq.elements[i + 1], 0, jobidx, weak);
3315 i += j + 1;
3316 }
3317 queue_free(&bq);
3318 return 1;
3319 }
3320 #endif
3321
3322 static void
setup_favormap(Solver * solv)3323 setup_favormap(Solver *solv)
3324 {
3325 Queue *job = &solv->job;
3326 Pool *pool = solv->pool;
3327 int i, idx;
3328 Id p, pp, how, what, select;
3329
3330 solv_free(solv->favormap);
3331 solv->favormap = solv_calloc(pool->nsolvables, sizeof(Id));
3332 for (i = 0; i < job->count; i += 2)
3333 {
3334 how = job->elements[i];
3335 if ((how & SOLVER_JOBMASK) != SOLVER_FAVOR && (how & SOLVER_JOBMASK) != SOLVER_DISFAVOR)
3336 continue;
3337 what = job->elements[i + 1];
3338 select = how & SOLVER_SELECTMASK;
3339 idx = (how & SOLVER_JOBMASK) == SOLVER_FAVOR ? i + 1 : -(i + 1);
3340 if (select == SOLVER_SOLVABLE_REPO)
3341 {
3342 Repo *repo = pool_id2repo(pool, what);
3343 if (repo)
3344 {
3345 Solvable *s;
3346 FOR_REPO_SOLVABLES(repo, p, s)
3347 {
3348 solv->favormap[p] = idx;
3349 if (idx < 0)
3350 solv->havedisfavored = 1;
3351 }
3352 }
3353 }
3354 FOR_JOB_SELECT(p, pp, select, what)
3355 {
3356 solv->favormap[p] = idx;
3357 if (idx < 0)
3358 solv->havedisfavored = 1;
3359 }
3360 }
3361 }
3362
3363 /*
3364 *
3365 * solve job queue
3366 *
3367 */
3368
3369 int
solver_solve(Solver * solv,Queue * job)3370 solver_solve(Solver *solv, Queue *job)
3371 {
3372 Pool *pool = solv->pool;
3373 Repo *installed = solv->installed;
3374 int i;
3375 int oldnrules, initialnrules;
3376 Map addedmap; /* '1' == have pkg-rules for solvable */
3377 Map installcandidatemap;
3378 Id how, what, select, name, weak, p, pp, d;
3379 Queue q;
3380 Solvable *s, *name_s;
3381 Rule *r;
3382 int now, solve_start;
3383 int needduprules = 0;
3384 int hasbestinstalljob = 0;
3385 int hasfavorjob = 0;
3386 int haslockjob = 0;
3387 int hasblacklistjob = 0;
3388
3389 solve_start = solv_timems(0);
3390
3391 /* log solver options */
3392 POOL_DEBUG(SOLV_DEBUG_STATS, "solver started\n");
3393 POOL_DEBUG(SOLV_DEBUG_STATS, "dosplitprovides=%d, noupdateprovide=%d, noinfarchcheck=%d\n", solv->dosplitprovides, solv->noupdateprovide, solv->noinfarchcheck);
3394 POOL_DEBUG(SOLV_DEBUG_STATS, "allowuninstall=%d, allowdowngrade=%d, allownamechange=%d, allowarchchange=%d, allowvendorchange=%d\n", solv->allowuninstall, solv->allowdowngrade, solv->allownamechange, solv->allowarchchange, solv->allowvendorchange);
3395 POOL_DEBUG(SOLV_DEBUG_STATS, "dupallowdowngrade=%d, dupallownamechange=%d, dupallowarchchange=%d, dupallowvendorchange=%d\n", solv->dup_allowdowngrade, solv->dup_allownamechange, solv->dup_allowarchchange, solv->dup_allowvendorchange);
3396 POOL_DEBUG(SOLV_DEBUG_STATS, "promoteepoch=%d, forbidselfconflicts=%d\n", pool->promoteepoch, pool->forbidselfconflicts);
3397 POOL_DEBUG(SOLV_DEBUG_STATS, "obsoleteusesprovides=%d, implicitobsoleteusesprovides=%d, obsoleteusescolors=%d, implicitobsoleteusescolors=%d\n", pool->obsoleteusesprovides, pool->implicitobsoleteusesprovides, pool->obsoleteusescolors, pool->implicitobsoleteusescolors);
3398 POOL_DEBUG(SOLV_DEBUG_STATS, "dontinstallrecommended=%d, addalreadyrecommended=%d onlynamespacerecommended=%d\n", solv->dontinstallrecommended, solv->addalreadyrecommended, solv->only_namespace_recommended);
3399
3400 /* create whatprovides if not already there */
3401 if (!pool->whatprovides)
3402 pool_createwhatprovides(pool);
3403
3404 /* create obsolete index */
3405 policy_create_obsolete_index(solv);
3406
3407 /* remember job */
3408 queue_free(&solv->job);
3409 queue_init_clone(&solv->job, job);
3410 solv->pooljobcnt = pool->pooljobs.count;
3411 if (pool->pooljobs.count)
3412 queue_insertn(&solv->job, 0, pool->pooljobs.count, pool->pooljobs.elements);
3413 job = &solv->job;
3414
3415 /* free old stuff in case we re-run a solver */
3416 queuep_free(&solv->update_targets);
3417 queuep_free(&solv->cleandeps_updatepkgs);
3418 queue_empty(&solv->ruleassertions);
3419 solv->bestrules_info = solv_free(solv->bestrules_info);
3420 solv->yumobsrules_info = solv_free(solv->yumobsrules_info);
3421 solv->recommendsrules_info = solv_free(solv->recommendsrules_info);
3422 solv->choicerules_info = solv_free(solv->choicerules_info);
3423 if (solv->noupdate.size)
3424 map_empty(&solv->noupdate);
3425 map_zerosize(&solv->multiversion);
3426 solv->updatemap_all = 0;
3427 map_zerosize(&solv->updatemap);
3428 solv->bestupdatemap_all = 0;
3429 map_zerosize(&solv->bestupdatemap);
3430 solv->fixmap_all = 0;
3431 map_zerosize(&solv->fixmap);
3432 map_zerosize(&solv->dupmap);
3433 map_zerosize(&solv->dupinvolvedmap);
3434 solv->process_orphans = 0;
3435 solv->droporphanedmap_all = 0;
3436 map_zerosize(&solv->droporphanedmap);
3437 solv->allowuninstall_all = 0;
3438 map_zerosize(&solv->allowuninstallmap);
3439 map_zerosize(&solv->cleandepsmap);
3440 map_zerosize(&solv->weakrulemap);
3441 solv->favormap = solv_free(solv->favormap);
3442 queue_empty(&solv->weakruleq);
3443 solv->watches = solv_free(solv->watches);
3444 queue_empty(&solv->ruletojob);
3445 if (solv->decisionq.count)
3446 memset(solv->decisionmap, 0, pool->nsolvables * sizeof(Id));
3447 queue_empty(&solv->decisionq);
3448 queue_empty(&solv->decisionq_why);
3449 queue_empty(&solv->decisionq_reason);
3450 queue_empty(&solv->learnt_why);
3451 queue_empty(&solv->learnt_pool);
3452 queue_empty(&solv->branches);
3453 solv->propagate_index = 0;
3454 queue_empty(&solv->problems);
3455 queue_empty(&solv->solutions);
3456 queue_empty(&solv->orphaned);
3457 solv->stats_learned = solv->stats_unsolvable = 0;
3458 if (solv->recommends_index)
3459 {
3460 map_empty(&solv->recommendsmap);
3461 map_empty(&solv->suggestsmap);
3462 queuep_free(&solv->recommendscplxq);
3463 queuep_free(&solv->suggestscplxq);
3464 solv->recommends_index = 0;
3465 }
3466 queuep_free(&solv->brokenorphanrules);
3467 solv->specialupdaters = solv_free(solv->specialupdaters);
3468
3469
3470 /*
3471 * create basic rule set of all involved packages
3472 * use addedmap bitmap to make sure we don't create rules twice
3473 */
3474
3475 /* create multiversion map if needed */
3476 solver_calculate_multiversionmap(pool, job, &solv->multiversion);
3477
3478 map_init(&addedmap, pool->nsolvables);
3479 MAPSET(&addedmap, SYSTEMSOLVABLE);
3480
3481 map_init(&installcandidatemap, pool->nsolvables);
3482 queue_init(&q);
3483
3484 now = solv_timems(0);
3485 /*
3486 * create rules for all package that could be involved with the solving
3487 * so called: pkg rules
3488 *
3489 */
3490 initialnrules = solv->pkgrules_end ? solv->pkgrules_end : 1;
3491 if (initialnrules > 1)
3492 deduceq2addedmap(solv, &addedmap); /* also enables all pkg rules */
3493 if (solv->nrules != initialnrules)
3494 solver_shrinkrules(solv, initialnrules); /* shrink to just pkg rules */
3495 solv->lastpkgrule = 0;
3496 solv->pkgrules_end = 0;
3497
3498 if (installed)
3499 {
3500 /* check for update/verify jobs as they need to be known early */
3501 /* also setup the droporphaned map, we need it when creating update rules */
3502 for (i = 0; i < job->count; i += 2)
3503 {
3504 how = job->elements[i];
3505 what = job->elements[i + 1];
3506 select = how & SOLVER_SELECTMASK;
3507 switch (how & SOLVER_JOBMASK)
3508 {
3509 case SOLVER_VERIFY:
3510 if (select == SOLVER_SOLVABLE_ALL || (select == SOLVER_SOLVABLE_REPO && installed && what == installed->repoid))
3511 solv->fixmap_all = 1;
3512 FOR_JOB_SELECT(p, pp, select, what)
3513 {
3514 s = pool->solvables + p;
3515 if (s->repo != installed)
3516 continue;
3517 if (!solv->fixmap.size)
3518 map_grow(&solv->fixmap, installed->end - installed->start);
3519 MAPSET(&solv->fixmap, p - installed->start);
3520 }
3521 break;
3522 case SOLVER_UPDATE:
3523 if (select == SOLVER_SOLVABLE_ALL)
3524 {
3525 solv->updatemap_all = 1;
3526 if (how & SOLVER_FORCEBEST)
3527 solv->bestupdatemap_all = 1;
3528 if (how & SOLVER_CLEANDEPS)
3529 {
3530 FOR_REPO_SOLVABLES(installed, p, s)
3531 add_cleandeps_updatepkg(solv, p);
3532 }
3533 }
3534 else if (select == SOLVER_SOLVABLE_REPO)
3535 {
3536 Repo *repo = pool_id2repo(pool, what);
3537 if (!repo)
3538 break;
3539 if (repo == installed && !(how & SOLVER_TARGETED))
3540 {
3541 solv->updatemap_all = 1;
3542 if (how & SOLVER_FORCEBEST)
3543 solv->bestupdatemap_all = 1;
3544 if (how & SOLVER_CLEANDEPS)
3545 {
3546 FOR_REPO_SOLVABLES(installed, p, s)
3547 add_cleandeps_updatepkg(solv, p);
3548 }
3549 break;
3550 }
3551 if (solv->noautotarget && !(how & SOLVER_TARGETED))
3552 break;
3553 /* targeted update */
3554 FOR_REPO_SOLVABLES(repo, p, s)
3555 add_update_target(solv, p, how);
3556 }
3557 else
3558 {
3559 if (!(how & SOLVER_TARGETED))
3560 {
3561 int targeted = 1;
3562 FOR_JOB_SELECT(p, pp, select, what)
3563 {
3564 s = pool->solvables + p;
3565 if (s->repo != installed)
3566 continue;
3567 if (!solv->updatemap.size)
3568 map_grow(&solv->updatemap, installed->end - installed->start);
3569 MAPSET(&solv->updatemap, p - installed->start);
3570 if (how & SOLVER_FORCEBEST)
3571 {
3572 if (!solv->bestupdatemap.size)
3573 map_grow(&solv->bestupdatemap, installed->end - installed->start);
3574 MAPSET(&solv->bestupdatemap, p - installed->start);
3575 }
3576 if (how & SOLVER_CLEANDEPS)
3577 add_cleandeps_updatepkg(solv, p);
3578 targeted = 0;
3579 }
3580 if (!targeted || solv->noautotarget)
3581 break;
3582 }
3583 FOR_JOB_SELECT(p, pp, select, what)
3584 add_update_target(solv, p, how);
3585 }
3586 break;
3587 case SOLVER_DROP_ORPHANED:
3588 if (select == SOLVER_SOLVABLE_ALL || (select == SOLVER_SOLVABLE_REPO && installed && what == installed->repoid))
3589 solv->droporphanedmap_all = 1;
3590 FOR_JOB_SELECT(p, pp, select, what)
3591 {
3592 s = pool->solvables + p;
3593 if (s->repo != installed)
3594 continue;
3595 if (!solv->droporphanedmap.size)
3596 map_grow(&solv->droporphanedmap, installed->end - installed->start);
3597 MAPSET(&solv->droporphanedmap, p - installed->start);
3598 }
3599 break;
3600 case SOLVER_ALLOWUNINSTALL:
3601 if (select == SOLVER_SOLVABLE_ALL || (select == SOLVER_SOLVABLE_REPO && installed && what == installed->repoid))
3602 solv->allowuninstall_all = 1;
3603 FOR_JOB_SELECT(p, pp, select, what)
3604 {
3605 s = pool->solvables + p;
3606 if (s->repo != installed)
3607 continue;
3608 if (!solv->allowuninstallmap.size)
3609 map_grow(&solv->allowuninstallmap, installed->end - installed->start);
3610 MAPSET(&solv->allowuninstallmap, p - installed->start);
3611 }
3612 break;
3613 default:
3614 break;
3615 }
3616 }
3617
3618 if (solv->update_targets)
3619 transform_update_targets(solv);
3620
3621 oldnrules = solv->nrules;
3622 FOR_REPO_SOLVABLES(installed, p, s)
3623 solver_addpkgrulesforsolvable(solv, s, &addedmap);
3624 POOL_DEBUG(SOLV_DEBUG_STATS, "added %d pkg rules for installed solvables\n", solv->nrules - oldnrules);
3625 oldnrules = solv->nrules;
3626 FOR_REPO_SOLVABLES(installed, p, s)
3627 solver_addpkgrulesforupdaters(solv, s, &addedmap, 1);
3628 POOL_DEBUG(SOLV_DEBUG_STATS, "added %d pkg rules for updaters of installed solvables\n", solv->nrules - oldnrules);
3629 }
3630
3631 /*
3632 * create rules for all packages involved in the job
3633 * (to be installed or removed)
3634 */
3635
3636 oldnrules = solv->nrules;
3637 for (i = 0; i < job->count; i += 2)
3638 {
3639 how = job->elements[i];
3640 what = job->elements[i + 1];
3641 select = how & SOLVER_SELECTMASK;
3642
3643 switch (how & SOLVER_JOBMASK)
3644 {
3645 case SOLVER_INSTALL:
3646 FOR_JOB_SELECT(p, pp, select, what)
3647 {
3648 MAPSET(&installcandidatemap, p);
3649 solver_addpkgrulesforsolvable(solv, pool->solvables + p, &addedmap);
3650 }
3651 break;
3652 case SOLVER_DISTUPGRADE:
3653 needduprules = 1;
3654 if (select == SOLVER_SOLVABLE_ALL)
3655 solv->process_orphans = 1;
3656 break;
3657 default:
3658 break;
3659 }
3660 }
3661 POOL_DEBUG(SOLV_DEBUG_STATS, "added %d pkg rules for packages involved in a job\n", solv->nrules - oldnrules);
3662
3663
3664 /*
3665 * add rules for suggests, enhances
3666 */
3667 oldnrules = solv->nrules;
3668 solver_addpkgrulesforweak(solv, &addedmap);
3669 POOL_DEBUG(SOLV_DEBUG_STATS, "added %d pkg rules because of weak dependencies\n", solv->nrules - oldnrules);
3670
3671 #ifdef ENABLE_LINKED_PKGS
3672 oldnrules = solv->nrules;
3673 solver_addpkgrulesforlinked(solv, &addedmap);
3674 POOL_DEBUG(SOLV_DEBUG_STATS, "added %d pkg rules because of linked packages\n", solv->nrules - oldnrules);
3675 #endif
3676
3677 /*
3678 * first pass done, we now have all the pkg rules we need.
3679 * unify existing rules before going over all job rules and
3680 * policy rules.
3681 * at this point the system is always solvable,
3682 * as an empty system (remove all packages) is a valid solution
3683 */
3684
3685 IF_POOLDEBUG (SOLV_DEBUG_STATS)
3686 {
3687 int possible = 0, installable = 0;
3688 for (i = 1; i < pool->nsolvables; i++)
3689 {
3690 if (pool_installable(pool, pool->solvables + i))
3691 installable++;
3692 if (MAPTST(&addedmap, i))
3693 possible++;
3694 }
3695 POOL_DEBUG(SOLV_DEBUG_STATS, "%d of %d installable solvables considered for solving\n", possible, installable);
3696 }
3697
3698 if (solv->nrules > initialnrules)
3699 solver_unifyrules(solv); /* remove duplicate pkg rules */
3700 solv->pkgrules_end = solv->nrules; /* mark end of pkg rules */
3701 solv->lastpkgrule = 0;
3702
3703 if (solv->nrules > initialnrules)
3704 addedmap2deduceq(solv, &addedmap); /* so that we can recreate the addedmap */
3705
3706 POOL_DEBUG(SOLV_DEBUG_STATS, "pkg rule memory used: %d K\n", solv->nrules * (int)sizeof(Rule) / 1024);
3707 POOL_DEBUG(SOLV_DEBUG_STATS, "pkg rule creation took %d ms\n", solv_timems(now));
3708
3709 /* create dup maps if needed. We need the maps early to create our
3710 * update rules */
3711 if (needduprules)
3712 solver_createdupmaps(solv);
3713
3714 /*
3715 * create feature rules
3716 *
3717 * foreach installed:
3718 * create assertion (keep installed, if no update available)
3719 * or
3720 * create update rule (A|update1(A)|update2(A)|...)
3721 *
3722 * those are used later on to keep a version of the installed packages in
3723 * best effort mode
3724 */
3725
3726 solv->featurerules = solv->nrules; /* mark start of feature rules */
3727 if (installed)
3728 {
3729 /* foreach possibly installed solvable */
3730 for (i = installed->start, s = pool->solvables + i; i < installed->end; i++, s++)
3731 {
3732 if (s->repo != installed)
3733 {
3734 solver_addrule(solv, 0, 0, 0); /* create dummy rule */
3735 continue;
3736 }
3737 solver_addfeaturerule(solv, s);
3738 }
3739 /* make sure we accounted for all rules */
3740 assert(solv->nrules - solv->featurerules == installed->end - installed->start);
3741 }
3742 solv->featurerules_end = solv->nrules;
3743
3744 /*
3745 * Add update rules for installed solvables
3746 *
3747 * almost identical to feature rules
3748 * except that downgrades/archchanges/vendorchanges are not allowed
3749 */
3750
3751 solv->updaterules = solv->nrules;
3752
3753 if (installed)
3754 { /* foreach installed solvables */
3755 /* we create all update rules, but disable some later on depending on the job */
3756 for (i = installed->start, s = pool->solvables + i; i < installed->end; i++, s++)
3757 {
3758 Rule *sr;
3759
3760 if (s->repo != installed)
3761 {
3762 solver_addrule(solv, 0, 0, 0); /* create dummy rule */
3763 continue;
3764 }
3765 solver_addupdaterule(solv, s);
3766 /*
3767 * check for and remove duplicate
3768 */
3769 r = solv->rules + solv->nrules - 1; /* r: update rule */
3770 sr = r - (installed->end - installed->start); /* sr: feature rule */
3771 if (!r->p)
3772 {
3773 if (sr->p)
3774 memset(sr, 0, sizeof(*sr)); /* no feature rules without update rules */
3775 continue;
3776 }
3777 /* it's also orphaned if the feature rule consists just of the installed package */
3778 if (!solv->process_orphans && sr->p == i && !sr->d && !sr->w2)
3779 queue_push(&solv->orphaned, i);
3780
3781 if (!solver_rulecmp(solv, r, sr))
3782 memset(sr, 0, sizeof(*sr)); /* delete unneeded feature rule */
3783 else if (sr->p)
3784 solver_disablerule(solv, sr); /* disable feature rule for now */
3785 }
3786 /* consistency check: we added a rule for _every_ installed solvable */
3787 assert(solv->nrules - solv->updaterules == installed->end - installed->start);
3788 }
3789 solv->updaterules_end = solv->nrules;
3790
3791
3792 /*
3793 * now add all job rules
3794 */
3795
3796 solv->jobrules = solv->nrules;
3797 for (i = 0; i < job->count; i += 2)
3798 {
3799 oldnrules = solv->nrules;
3800
3801 if (i && i == solv->pooljobcnt)
3802 POOL_DEBUG(SOLV_DEBUG_JOB, "end of pool jobs\n");
3803 how = job->elements[i];
3804 what = job->elements[i + 1];
3805 weak = how & SOLVER_WEAK;
3806 select = how & SOLVER_SELECTMASK;
3807 switch (how & SOLVER_JOBMASK)
3808 {
3809 case SOLVER_INSTALL:
3810 POOL_DEBUG(SOLV_DEBUG_JOB, "job: %sinstall %s\n", weak ? "weak " : "", solver_select2str(pool, select, what));
3811 if ((how & SOLVER_CLEANDEPS) != 0 && !solv->cleandepsmap.size && installed)
3812 map_grow(&solv->cleandepsmap, installed->end - installed->start);
3813 if (select == SOLVER_SOLVABLE)
3814 {
3815 p = what;
3816 d = 0;
3817 }
3818 #ifdef ENABLE_COMPLEX_DEPS
3819 else if ((select == SOLVER_SOLVABLE_PROVIDES || select == SOLVER_SOLVABLE_NAME) && pool_is_complex_dep(pool, what))
3820 {
3821 if (add_complex_jobrules(solv, what, select == SOLVER_SOLVABLE_NAME ? CPLXDEPS_NAME : 0, i, weak))
3822 if (how & SOLVER_FORCEBEST)
3823 hasbestinstalljob = 1;
3824 break;
3825 }
3826 #endif
3827 else
3828 {
3829 queue_empty(&q);
3830 FOR_JOB_SELECT(p, pp, select, what)
3831 queue_push(&q, p);
3832 if (!q.count)
3833 {
3834 if (select == SOLVER_SOLVABLE_ONE_OF)
3835 break; /* ignore empty installs */
3836 /* no candidate found or unsupported, make this an impossible rule */
3837 queue_push(&q, -SYSTEMSOLVABLE);
3838 }
3839 p = queue_shift(&q); /* get first candidate */
3840 d = !q.count ? 0 : pool_queuetowhatprovides(pool, &q); /* internalize */
3841 }
3842 /* force install of namespace supplements hack */
3843 if (select == SOLVER_SOLVABLE_PROVIDES && !d && (p == SYSTEMSOLVABLE || p == -SYSTEMSOLVABLE) && ISRELDEP(what))
3844 {
3845 Reldep *rd = GETRELDEP(pool, what);
3846 if (rd->flags == REL_NAMESPACE)
3847 {
3848 p = SYSTEMSOLVABLE;
3849 if (!solv->installsuppdepq)
3850 {
3851 solv->installsuppdepq = solv_calloc(1, sizeof(Queue));
3852 queue_init(solv->installsuppdepq);
3853 }
3854 queue_pushunique(solv->installsuppdepq, rd->evr == 0 ? rd->name : what);
3855 }
3856 }
3857 solver_addjobrule(solv, p, 0, d, i, weak);
3858 if (how & SOLVER_FORCEBEST)
3859 hasbestinstalljob = 1;
3860 break;
3861 case SOLVER_ERASE:
3862 POOL_DEBUG(SOLV_DEBUG_JOB, "job: %s%serase %s\n", weak ? "weak " : "", how & SOLVER_CLEANDEPS ? "clean deps " : "", solver_select2str(pool, select, what));
3863 if ((how & SOLVER_CLEANDEPS) != 0 && !solv->cleandepsmap.size && installed)
3864 map_grow(&solv->cleandepsmap, installed->end - installed->start);
3865 /* specific solvable: by id or by nevra */
3866 name = (select == SOLVER_SOLVABLE || (select == SOLVER_SOLVABLE_NAME && ISRELDEP(what))) ? 0 : -1;
3867 name_s = 0;
3868 if (select == SOLVER_SOLVABLE_ALL) /* hmmm ;) */
3869 {
3870 FOR_POOL_SOLVABLES(p)
3871 solver_addjobrule(solv, -p, 0, 0, i, weak);
3872 }
3873 else if (select == SOLVER_SOLVABLE_REPO)
3874 {
3875 Repo *repo = pool_id2repo(pool, what);
3876 if (repo)
3877 {
3878 FOR_REPO_SOLVABLES(repo, p, s)
3879 solver_addjobrule(solv, -p, 0, 0, i, weak);
3880 }
3881 }
3882 #ifdef ENABLE_COMPLEX_DEPS
3883 else if ((select == SOLVER_SOLVABLE_PROVIDES || select == SOLVER_SOLVABLE_NAME) && pool_is_complex_dep(pool, what))
3884 {
3885 /* no special "erase a specific solvable" handling? */
3886 add_complex_jobrules(solv, what, select == SOLVER_SOLVABLE_NAME ? (CPLXDEPS_NAME | CPLXDEPS_TODNF | CPLXDEPS_INVERT) : (CPLXDEPS_TODNF | CPLXDEPS_INVERT), i, weak);
3887 break;
3888 }
3889 #endif
3890 FOR_JOB_SELECT(p, pp, select, what)
3891 {
3892 s = pool->solvables + p;
3893 if (installed && s->repo == installed)
3894 {
3895 name = !name ? s->name : -1;
3896 name_s = s;
3897 }
3898 solver_addjobrule(solv, -p, 0, 0, i, weak);
3899 #ifdef ENABLE_LINKED_PKGS
3900 if (solv->instbuddy && installed && s->repo == installed && solv->instbuddy[p - installed->start] > 1)
3901 solver_addjobrule(solv, -solv->instbuddy[p - installed->start], 0, 0, i, weak);
3902 #endif
3903 }
3904 /* special case for "erase a specific solvable": we also
3905 * erase all other solvables with that name, so that they
3906 * don't get picked up as replacement.
3907 * name is > 0 if exactly one installed solvable matched.
3908 */
3909 /* XXX: look also at packages that obsolete this package? */
3910 if (name > 0)
3911 {
3912 int j, k;
3913 k = solv->nrules;
3914 FOR_PROVIDES(p, pp, name)
3915 {
3916 s = pool->solvables + p;
3917 if (s->name != name)
3918 continue;
3919 /* keep other versions installed */
3920 if (s->repo == installed)
3921 continue;
3922 /* keep installcandidates of other jobs */
3923 if (MAPTST(&installcandidatemap, p))
3924 continue;
3925 if (pool->implicitobsoleteusescolors && !pool_colormatch(pool, name_s, s))
3926 continue;
3927 /* don't add the same rule twice */
3928 for (j = oldnrules; j < k; j++)
3929 if (solv->rules[j].p == -p)
3930 break;
3931 if (j == k)
3932 solver_addjobrule(solv, -p, 0, 0, i, weak); /* remove by id */
3933 }
3934 }
3935 break;
3936
3937 case SOLVER_UPDATE:
3938 POOL_DEBUG(SOLV_DEBUG_JOB, "job: %supdate %s\n", weak ? "weak " : "", solver_select2str(pool, select, what));
3939 break;
3940 case SOLVER_VERIFY:
3941 POOL_DEBUG(SOLV_DEBUG_JOB, "job: %sverify %s\n", weak ? "weak " : "", solver_select2str(pool, select, what));
3942 break;
3943 case SOLVER_WEAKENDEPS:
3944 POOL_DEBUG(SOLV_DEBUG_JOB, "job: %sweaken deps %s\n", weak ? "weak " : "", solver_select2str(pool, select, what));
3945 if (select != SOLVER_SOLVABLE)
3946 break;
3947 s = pool->solvables + what;
3948 weaken_solvable_deps(solv, what);
3949 break;
3950 case SOLVER_MULTIVERSION:
3951 POOL_DEBUG(SOLV_DEBUG_JOB, "job: %smultiversion %s\n", weak ? "weak " : "", solver_select2str(pool, select, what));
3952 break;
3953 case SOLVER_LOCK:
3954 POOL_DEBUG(SOLV_DEBUG_JOB, "job: %slock %s\n", weak ? "weak " : "", solver_select2str(pool, select, what));
3955 if (select == SOLVER_SOLVABLE_ALL)
3956 {
3957 FOR_POOL_SOLVABLES(p)
3958 solver_addjobrule(solv, installed && pool->solvables[p].repo == installed ? p : -p, 0, 0, i, weak);
3959 }
3960 else if (select == SOLVER_SOLVABLE_REPO)
3961 {
3962 Repo *repo = pool_id2repo(pool, what);
3963 if (repo)
3964 {
3965 FOR_REPO_SOLVABLES(repo, p, s)
3966 solver_addjobrule(solv, installed && pool->solvables[p].repo == installed ? p : -p, 0, 0, i, weak);
3967 }
3968 }
3969 FOR_JOB_SELECT(p, pp, select, what)
3970 {
3971 s = pool->solvables + p;
3972 solver_addjobrule(solv, installed && s->repo == installed ? p : -p, 0, 0, i, weak);
3973 #ifdef ENABLE_LINKED_PKGS
3974 if (solv->instbuddy && installed && s->repo == installed && solv->instbuddy[p - installed->start] > 1)
3975 solver_addjobrule(solv, solv->instbuddy[p - installed->start], 0, 0, i, weak);
3976 #endif
3977 }
3978 if (solv->nrules != oldnrules)
3979 haslockjob = 1;
3980 break;
3981 case SOLVER_DISTUPGRADE:
3982 POOL_DEBUG(SOLV_DEBUG_JOB, "job: distupgrade %s\n", solver_select2str(pool, select, what));
3983 break;
3984 case SOLVER_DROP_ORPHANED:
3985 POOL_DEBUG(SOLV_DEBUG_JOB, "job: drop orphaned %s\n", solver_select2str(pool, select, what));
3986 break;
3987 case SOLVER_USERINSTALLED:
3988 POOL_DEBUG(SOLV_DEBUG_JOB, "job: user installed %s\n", solver_select2str(pool, select, what));
3989 break;
3990 case SOLVER_ALLOWUNINSTALL:
3991 POOL_DEBUG(SOLV_DEBUG_JOB, "job: allowuninstall %s\n", solver_select2str(pool, select, what));
3992 break;
3993 case SOLVER_FAVOR:
3994 case SOLVER_DISFAVOR:
3995 POOL_DEBUG(SOLV_DEBUG_JOB, "job: %s %s\n", (how & SOLVER_JOBMASK) == SOLVER_FAVOR ? "favor" : "disfavor", solver_select2str(pool, select, what));
3996 hasfavorjob = 1;
3997 break;
3998 case SOLVER_BLACKLIST:
3999 POOL_DEBUG(SOLV_DEBUG_JOB, "job: blacklist %s\n", solver_select2str(pool, select, what));
4000 hasblacklistjob = 1;
4001 break;
4002 default:
4003 POOL_DEBUG(SOLV_DEBUG_JOB, "job: unknown job\n");
4004 break;
4005 }
4006
4007 IF_POOLDEBUG (SOLV_DEBUG_JOB)
4008 {
4009 int j;
4010 if (solv->nrules == oldnrules)
4011 POOL_DEBUG(SOLV_DEBUG_JOB, " - no rule created\n");
4012 for (j = oldnrules; j < solv->nrules; j++)
4013 {
4014 POOL_DEBUG(SOLV_DEBUG_JOB, " - job ");
4015 solver_printrule(solv, SOLV_DEBUG_JOB, solv->rules + j);
4016 }
4017 }
4018 }
4019 assert(solv->ruletojob.count == solv->nrules - solv->jobrules);
4020 solv->jobrules_end = solv->nrules;
4021
4022 /* create favormap if we have favor jobs */
4023 if (hasfavorjob)
4024 setup_favormap(solv);
4025
4026 /* now create infarch and dup rules */
4027 if (!solv->noinfarchcheck)
4028 solver_addinfarchrules(solv, &addedmap);
4029 else
4030 solv->infarchrules = solv->infarchrules_end = solv->nrules;
4031
4032 if (solv->dupinvolvedmap_all || solv->dupinvolvedmap.size)
4033 solver_addduprules(solv, &addedmap);
4034 else
4035 solv->duprules = solv->duprules_end = solv->nrules;
4036
4037 #ifdef ENABLE_LINKED_PKGS
4038 if (solv->instbuddy && solv->updatemap.size)
4039 extend_updatemap_to_buddies(solv);
4040 #endif
4041
4042 if (solv->bestupdatemap_all || solv->bestupdatemap.size || hasbestinstalljob)
4043 solver_addbestrules(solv, hasbestinstalljob, haslockjob);
4044 else
4045 solv->bestrules = solv->bestrules_end = solv->bestrules_up = solv->nrules;
4046
4047 if (needduprules)
4048 solver_freedupmaps(solv); /* no longer needed */
4049
4050 if (solv->do_yum_obsoletes)
4051 solver_addyumobsrules(solv);
4052 else
4053 solv->yumobsrules = solv->yumobsrules_end = solv->nrules;
4054
4055 if (hasblacklistjob)
4056 solver_addblackrules(solv);
4057 else
4058 solv->blackrules = solv->blackrules_end = solv->nrules;
4059
4060 if (solv->havedisfavored && solv->strongrecommends && solv->recommendsruleq)
4061 solver_addrecommendsrules(solv);
4062 else
4063 solv->recommendsrules = solv->recommendsrules_end = solv->nrules;
4064
4065 if (1)
4066 solver_addchoicerules(solv);
4067 else
4068 solv->choicerules = solv->choicerules_end = solv->nrules;
4069
4070 /* all rules created
4071 * --------------------------------------------------------------
4072 * prepare for solving
4073 */
4074
4075 /* free unneeded memory */
4076 map_free(&addedmap);
4077 map_free(&installcandidatemap);
4078 queue_free(&q);
4079
4080 POOL_DEBUG(SOLV_DEBUG_STATS, "%d pkg rules, 2 * %d update rules, %d job rules, %d infarch rules, %d dup rules, %d choice rules, %d best rules, %d yumobs rules\n", solv->pkgrules_end - 1, solv->updaterules_end - solv->updaterules, solv->jobrules_end - solv->jobrules, solv->infarchrules_end - solv->infarchrules, solv->duprules_end - solv->duprules, solv->choicerules_end - solv->choicerules, solv->bestrules_end - solv->bestrules, solv->yumobsrules_end - solv->yumobsrules);
4081 POOL_DEBUG(SOLV_DEBUG_STATS, "overall rule memory used: %d K\n", solv->nrules * (int)sizeof(Rule) / 1024);
4082
4083 /* create weak map */
4084 if (solv->weakruleq.count || solv->recommendsruleq)
4085 {
4086 map_grow(&solv->weakrulemap, solv->nrules);
4087 for (i = 0; i < solv->weakruleq.count; i++)
4088 {
4089 p = solv->weakruleq.elements[i];
4090 MAPSET(&solv->weakrulemap, p);
4091 }
4092 if (solv->recommendsruleq)
4093 {
4094 for (i = 0; i < solv->recommendsruleq->count; i++)
4095 {
4096 p = solv->recommendsruleq->elements[i];
4097 MAPSET(&solv->weakrulemap, p);
4098 }
4099 }
4100 }
4101
4102 /* enable cleandepsmap creation if we have updatepkgs */
4103 if (solv->cleandeps_updatepkgs && !solv->cleandepsmap.size)
4104 map_grow(&solv->cleandepsmap, installed->end - installed->start);
4105 /* no mistakes */
4106 if (solv->cleandeps_mistakes)
4107 {
4108 queue_free(solv->cleandeps_mistakes);
4109 solv->cleandeps_mistakes = solv_free(solv->cleandeps_mistakes);
4110 }
4111
4112 /* all new rules are learnt after this point */
4113 solv->learntrules = solv->nrules;
4114
4115 /* create watches chains */
4116 makewatches(solv);
4117
4118 /* create assertion index. it is only used to speed up
4119 * makeruledecsions() a bit */
4120 for (i = 1, r = solv->rules + i; i < solv->nrules; i++, r++)
4121 if (r->p && !r->w2 && (r->d == 0 || r->d == -1))
4122 queue_push(&solv->ruleassertions, i);
4123
4124 /* disable update rules that conflict with our job */
4125 solver_disablepolicyrules(solv);
4126
4127 /* break orphans if requested */
4128 if (solv->process_orphans && solv->orphaned.count && solv->break_orphans)
4129 solver_breakorphans(solv);
4130
4131 /*
4132 * ********************************************
4133 * solve!
4134 * ********************************************
4135 */
4136
4137 now = solv_timems(0);
4138 solver_run_sat(solv, 1, solv->dontinstallrecommended ? 0 : 1);
4139 POOL_DEBUG(SOLV_DEBUG_STATS, "solver took %d ms\n", solv_timems(now));
4140
4141 /*
4142 * prepare solution queue if there were problems
4143 */
4144 solver_prepare_solutions(solv);
4145
4146 POOL_DEBUG(SOLV_DEBUG_STATS, "final solver statistics: %d problems, %d learned rules, %d unsolvable\n", solv->problems.count / 2, solv->stats_learned, solv->stats_unsolvable);
4147 POOL_DEBUG(SOLV_DEBUG_STATS, "solver_solve took %d ms\n", solv_timems(solve_start));
4148
4149 /* return number of problems */
4150 return solv->problems.count ? solv->problems.count / 2 : 0;
4151 }
4152
4153 Transaction *
solver_create_transaction(Solver * solv)4154 solver_create_transaction(Solver *solv)
4155 {
4156 return transaction_create_decisionq(solv->pool, &solv->decisionq, &solv->multiversion);
4157 }
4158
solver_get_orphaned(Solver * solv,Queue * orphanedq)4159 void solver_get_orphaned(Solver *solv, Queue *orphanedq)
4160 {
4161 queue_free(orphanedq);
4162 queue_init_clone(orphanedq, &solv->orphaned);
4163 }
4164
solver_get_cleandeps(Solver * solv,Queue * cleandepsq)4165 void solver_get_cleandeps(Solver *solv, Queue *cleandepsq)
4166 {
4167 Pool *pool = solv->pool;
4168 Repo *installed = solv->installed;
4169 Solvable *s;
4170 Rule *r;
4171 Id p, pp, pr;
4172
4173 queue_empty(cleandepsq);
4174 if (!installed || !solv->cleandepsmap.size)
4175 return;
4176 FOR_REPO_SOLVABLES(installed, p, s)
4177 {
4178 if (!MAPTST(&solv->cleandepsmap, p - installed->start) || solv->decisionmap[p] >= 0)
4179 continue;
4180 /* now check the update rule */
4181 r = solv->rules + solv->updaterules + (p - solv->installed->start);
4182 if (r->p)
4183 {
4184 FOR_RULELITERALS(pr, pp, r)
4185 if (solv->decisionmap[pr] > 0)
4186 break;
4187 if (pr)
4188 continue;
4189 }
4190 queue_push(cleandepsq, p);
4191 }
4192 }
4193
solver_get_recommendations(Solver * solv,Queue * recommendationsq,Queue * suggestionsq,int noselected)4194 void solver_get_recommendations(Solver *solv, Queue *recommendationsq, Queue *suggestionsq, int noselected)
4195 {
4196 Pool *pool = solv->pool;
4197 Queue redoq, disabledq;
4198 int goterase, i;
4199 Solvable *s;
4200 Rule *r;
4201 Map obsmap;
4202
4203 if (!recommendationsq && !suggestionsq)
4204 return;
4205
4206 map_init(&obsmap, pool->nsolvables);
4207 if (solv->installed)
4208 {
4209 Id obs, *obsp, p, po, ppo;
4210 for (p = solv->installed->start; p < solv->installed->end; p++)
4211 {
4212 s = pool->solvables + p;
4213 if (s->repo != solv->installed || !s->obsoletes)
4214 continue;
4215 if (solv->decisionmap[p] <= 0)
4216 continue;
4217 if (solv->multiversion.size && MAPTST(&solv->multiversion, p))
4218 continue;
4219 obsp = s->repo->idarraydata + s->obsoletes;
4220 /* foreach obsoletes */
4221 while ((obs = *obsp++) != 0)
4222 FOR_PROVIDES(po, ppo, obs)
4223 MAPSET(&obsmap, po);
4224 }
4225 }
4226
4227 queue_init(&redoq);
4228 queue_init(&disabledq);
4229 goterase = 0;
4230 /* disable all erase jobs (including weak "keep uninstalled" rules) */
4231 for (i = solv->jobrules, r = solv->rules + i; i < solv->jobrules_end; i++, r++)
4232 {
4233 if (r->d < 0) /* disabled ? */
4234 continue;
4235 if (r->p >= 0) /* install job? */
4236 continue;
4237 queue_push(&disabledq, i);
4238 solver_disablerule(solv, r);
4239 goterase++;
4240 }
4241
4242 if (goterase)
4243 {
4244 enabledisablelearntrules(solv);
4245 removedisabledconflicts(solv, &redoq);
4246 }
4247
4248 /*
4249 * find recommended packages
4250 */
4251 if (recommendationsq)
4252 {
4253 Id rec, *recp, p, pp;
4254
4255 queue_empty(recommendationsq);
4256 /* create map of all recommened packages */
4257 solv->recommends_index = -1;
4258 MAPZERO(&solv->recommendsmap);
4259
4260 /* put all packages the solver already chose in the map */
4261 for (i = 1; i < solv->decisionq.count; i++)
4262 if ((p = solv->decisionq.elements[i]) > 0 && solv->decisionq_why.elements[i] == 0)
4263 {
4264 if (solv->decisionq_reason.elements[solv->decisionmap[p]] == SOLVER_REASON_WEAKDEP)
4265 MAPSET(&solv->recommendsmap, p);
4266 }
4267
4268 for (i = 0; i < solv->decisionq.count; i++)
4269 {
4270 p = solv->decisionq.elements[i];
4271 if (p < 0)
4272 continue;
4273 s = pool->solvables + p;
4274 if (s->recommends)
4275 {
4276 recp = s->repo->idarraydata + s->recommends;
4277 while ((rec = *recp++) != 0)
4278 {
4279 #ifdef ENABLE_COMPLEX_DEPS
4280 if (pool_is_complex_dep(pool, rec))
4281 {
4282 do_complex_recommendations(solv, rec, &solv->recommendsmap, noselected);
4283 continue;
4284 }
4285 #endif
4286 FOR_PROVIDES(p, pp, rec)
4287 if (solv->decisionmap[p] > 0)
4288 break;
4289 if (p)
4290 {
4291 if (!noselected)
4292 {
4293 FOR_PROVIDES(p, pp, rec)
4294 if (solv->decisionmap[p] > 0)
4295 MAPSET(&solv->recommendsmap, p);
4296 }
4297 continue; /* p != 0: already fulfilled */
4298 }
4299 FOR_PROVIDES(p, pp, rec)
4300 MAPSET(&solv->recommendsmap, p);
4301 }
4302 }
4303 }
4304 for (i = 1; i < pool->nsolvables; i++)
4305 {
4306 if (solv->decisionmap[i] < 0)
4307 continue;
4308 if (solv->decisionmap[i] > 0 && noselected)
4309 continue;
4310 if (MAPTST(&obsmap, i))
4311 continue;
4312 s = pool->solvables + i;
4313 if (!MAPTST(&solv->recommendsmap, i))
4314 {
4315 if (!s->supplements)
4316 continue;
4317 if (!pool_installable(pool, s))
4318 continue;
4319 if (!solver_is_supplementing(solv, s))
4320 continue;
4321 }
4322 queue_push(recommendationsq, i);
4323 }
4324 /* we use MODE_SUGGEST here so that repo prio is ignored */
4325 policy_filter_unwanted(solv, recommendationsq, POLICY_MODE_SUGGEST);
4326 }
4327
4328 /*
4329 * find suggested packages
4330 */
4331
4332 if (suggestionsq)
4333 {
4334 Id sug, *sugp, p, pp;
4335
4336 queue_empty(suggestionsq);
4337 /* create map of all suggests that are still open */
4338 solv->recommends_index = -1;
4339 MAPZERO(&solv->suggestsmap);
4340 for (i = 0; i < solv->decisionq.count; i++)
4341 {
4342 p = solv->decisionq.elements[i];
4343 if (p < 0)
4344 continue;
4345 s = pool->solvables + p;
4346 if (s->suggests)
4347 {
4348 sugp = s->repo->idarraydata + s->suggests;
4349 while ((sug = *sugp++) != 0)
4350 {
4351 #ifdef ENABLE_COMPLEX_DEPS
4352 if (pool_is_complex_dep(pool, sug))
4353 {
4354 do_complex_recommendations(solv, sug, &solv->suggestsmap, noselected);
4355 continue;
4356 }
4357 #endif
4358 FOR_PROVIDES(p, pp, sug)
4359 if (solv->decisionmap[p] > 0)
4360 break;
4361 if (p)
4362 {
4363 if (!noselected)
4364 {
4365 FOR_PROVIDES(p, pp, sug)
4366 if (solv->decisionmap[p] > 0)
4367 MAPSET(&solv->suggestsmap, p);
4368 }
4369 continue; /* already fulfilled */
4370 }
4371 FOR_PROVIDES(p, pp, sug)
4372 MAPSET(&solv->suggestsmap, p);
4373 }
4374 }
4375 }
4376 for (i = 1; i < pool->nsolvables; i++)
4377 {
4378 if (solv->decisionmap[i] < 0)
4379 continue;
4380 if (solv->decisionmap[i] > 0 && noselected)
4381 continue;
4382 if (MAPTST(&obsmap, i))
4383 continue;
4384 s = pool->solvables + i;
4385 if (!MAPTST(&solv->suggestsmap, i))
4386 {
4387 if (!s->enhances)
4388 continue;
4389 if (!pool_installable(pool, s))
4390 continue;
4391 if (!solver_is_enhancing(solv, s))
4392 continue;
4393 }
4394 queue_push(suggestionsq, i);
4395 }
4396 policy_filter_unwanted(solv, suggestionsq, POLICY_MODE_SUGGEST);
4397 }
4398
4399 /* undo removedisabledconflicts */
4400 if (redoq.count)
4401 undo_removedisabledconflicts(solv, &redoq);
4402 queue_free(&redoq);
4403
4404 /* undo job rule disabling */
4405 for (i = 0; i < disabledq.count; i++)
4406 solver_enablerule(solv, solv->rules + disabledq.elements[i]);
4407 queue_free(&disabledq);
4408 map_free(&obsmap);
4409 }
4410
4411
4412 /***********************************************************************/
4413 /* disk usage computations */
4414
4415 /*-------------------------------------------------------------------
4416 *
4417 * calculate DU changes
4418 */
4419
4420 void
solver_calc_duchanges(Solver * solv,DUChanges * mps,int nmps)4421 solver_calc_duchanges(Solver *solv, DUChanges *mps, int nmps)
4422 {
4423 Map installedmap;
4424
4425 solver_create_state_maps(solv, &installedmap, 0);
4426 pool_calc_duchanges(solv->pool, &installedmap, mps, nmps);
4427 map_free(&installedmap);
4428 }
4429
4430
4431 /*-------------------------------------------------------------------
4432 *
4433 * calculate changes in install size
4434 */
4435
4436 int
solver_calc_installsizechange(Solver * solv)4437 solver_calc_installsizechange(Solver *solv)
4438 {
4439 Map installedmap;
4440 int change;
4441
4442 solver_create_state_maps(solv, &installedmap, 0);
4443 change = pool_calc_installsizechange(solv->pool, &installedmap);
4444 map_free(&installedmap);
4445 return change;
4446 }
4447
4448 void
solver_create_state_maps(Solver * solv,Map * installedmap,Map * conflictsmap)4449 solver_create_state_maps(Solver *solv, Map *installedmap, Map *conflictsmap)
4450 {
4451 pool_create_state_maps(solv->pool, &solv->decisionq, installedmap, conflictsmap);
4452 }
4453
4454 /*-------------------------------------------------------------------
4455 *
4456 * decision introspection
4457 */
4458
4459 int
solver_get_decisionlevel(Solver * solv,Id p)4460 solver_get_decisionlevel(Solver *solv, Id p)
4461 {
4462 return solv->decisionmap[p];
4463 }
4464
4465 void
solver_get_decisionqueue(Solver * solv,Queue * decisionq)4466 solver_get_decisionqueue(Solver *solv, Queue *decisionq)
4467 {
4468 queue_free(decisionq);
4469 queue_init_clone(decisionq, &solv->decisionq);
4470 }
4471
4472 int
solver_get_lastdecisionblocklevel(Solver * solv)4473 solver_get_lastdecisionblocklevel(Solver *solv)
4474 {
4475 Id p;
4476 if (solv->decisionq.count == 0)
4477 return 0;
4478 p = solv->decisionq.elements[solv->decisionq.count - 1];
4479 if (p < 0)
4480 p = -p;
4481 return solv->decisionmap[p] < 0 ? -solv->decisionmap[p] : solv->decisionmap[p];
4482 }
4483
4484 void
solver_get_decisionblock(Solver * solv,int level,Queue * decisionq)4485 solver_get_decisionblock(Solver *solv, int level, Queue *decisionq)
4486 {
4487 Id p;
4488 int i;
4489
4490 queue_empty(decisionq);
4491 for (i = 0; i < solv->decisionq.count; i++)
4492 {
4493 p = solv->decisionq.elements[i];
4494 if (p < 0)
4495 p = -p;
4496 if (solv->decisionmap[p] == level || solv->decisionmap[p] == -level)
4497 break;
4498 }
4499 if (i == solv->decisionq.count)
4500 return;
4501 for (i = 0; i < solv->decisionq.count; i++)
4502 {
4503 p = solv->decisionq.elements[i];
4504 if (p < 0)
4505 p = -p;
4506 if (solv->decisionmap[p] == level || solv->decisionmap[p] == -level)
4507 queue_push(decisionq, p);
4508 else
4509 break;
4510 }
4511 }
4512
4513 int
solver_describe_decision(Solver * solv,Id p,Id * infop)4514 solver_describe_decision(Solver *solv, Id p, Id *infop)
4515 {
4516 int i;
4517 Id pp, why;
4518
4519 if (infop)
4520 *infop = 0;
4521 if (!solv->decisionmap[p])
4522 return SOLVER_REASON_UNRELATED;
4523 pp = solv->decisionmap[p] < 0 ? -p : p;
4524 for (i = 0; i < solv->decisionq.count; i++)
4525 if (solv->decisionq.elements[i] == pp)
4526 break;
4527 if (i == solv->decisionq.count) /* just in case... */
4528 return SOLVER_REASON_UNRELATED;
4529 why = solv->decisionq_why.elements[i];
4530 if (infop)
4531 *infop = why > 0 ? why : -why;
4532 if (why > 0)
4533 return SOLVER_REASON_UNIT_RULE;
4534 i = solv->decisionmap[p] >= 0 ? solv->decisionmap[p] : -solv->decisionmap[p];
4535 return solv->decisionq_reason.elements[i];
4536 }
4537
4538
4539 void
solver_describe_weakdep_decision(Solver * solv,Id p,Queue * whyq)4540 solver_describe_weakdep_decision(Solver *solv, Id p, Queue *whyq)
4541 {
4542 Pool *pool = solv->pool;
4543 int i;
4544 int level = solv->decisionmap[p];
4545 int decisionno;
4546 Solvable *s;
4547
4548 queue_empty(whyq);
4549 if (level < 0)
4550 return; /* huh? */
4551 for (decisionno = 0; decisionno < solv->decisionq.count; decisionno++)
4552 if (solv->decisionq.elements[decisionno] == p)
4553 break;
4554 if (decisionno == solv->decisionq.count)
4555 return; /* huh? */
4556 i = solv->decisionmap[p] >= 0 ? solv->decisionmap[p] : -solv->decisionmap[p];
4557 if (solv->decisionq_reason.elements[i] != SOLVER_REASON_WEAKDEP)
4558 return; /* huh? */
4559
4560 /* 1) list all packages that recommend us */
4561 for (i = 1; i < pool->nsolvables; i++)
4562 {
4563 Id *recp, rec, pp2, p2;
4564 if (solv->decisionmap[i] <= 0 || solv->decisionmap[i] >= level)
4565 continue;
4566 s = pool->solvables + i;
4567 if (!s->recommends)
4568 continue;
4569 if (!solv->addalreadyrecommended && s->repo == solv->installed)
4570 continue;
4571 recp = s->repo->idarraydata + s->recommends;
4572 while ((rec = *recp++) != 0)
4573 {
4574 int found = 0;
4575 FOR_PROVIDES(p2, pp2, rec)
4576 {
4577 if (p2 == p)
4578 found = 1;
4579 else
4580 {
4581 /* if p2 is already installed, this recommends is ignored */
4582 if (solv->decisionmap[p2] > 0 && solv->decisionmap[p2] < level)
4583 break;
4584 }
4585 }
4586 if (!p2 && found)
4587 {
4588 queue_push(whyq, SOLVER_REASON_RECOMMENDED);
4589 queue_push2(whyq, i, rec);
4590 }
4591 }
4592 }
4593 /* 2) list all supplements */
4594 s = pool->solvables + p;
4595 if (s->supplements && level > 0)
4596 {
4597 Id *supp, sup, pp2, p2;
4598 /* this is a hack. to use solver_dep_fulfilled we temporarily clear
4599 * everything above our level in the decisionmap */
4600 for (i = decisionno; i < solv->decisionq.count; i++ )
4601 {
4602 p2 = solv->decisionq.elements[i];
4603 if (p2 > 0)
4604 solv->decisionmap[p2] = -solv->decisionmap[p2];
4605 }
4606 supp = s->repo->idarraydata + s->supplements;
4607 while ((sup = *supp++) != 0)
4608 if (solver_dep_fulfilled(solv, sup))
4609 {
4610 int found = 0;
4611 /* let's see if this is an easy supp */
4612 FOR_PROVIDES(p2, pp2, sup)
4613 {
4614 if (!solv->addalreadyrecommended && solv->installed)
4615 {
4616 if (pool->solvables[p2].repo == solv->installed)
4617 continue;
4618 }
4619 if (solv->decisionmap[p2] > 0 && solv->decisionmap[p2] < level)
4620 {
4621 queue_push(whyq, SOLVER_REASON_SUPPLEMENTED);
4622 queue_push2(whyq, p2, sup);
4623 found = 1;
4624 }
4625 }
4626 if (!found)
4627 {
4628 /* hard case, just note dependency with no package */
4629 queue_push(whyq, SOLVER_REASON_SUPPLEMENTED);
4630 queue_push2(whyq, 0, sup);
4631 }
4632 }
4633 for (i = decisionno; i < solv->decisionq.count; i++)
4634 {
4635 p2 = solv->decisionq.elements[i];
4636 if (p2 > 0)
4637 solv->decisionmap[p2] = -solv->decisionmap[p2];
4638 }
4639 }
4640 }
4641
4642 void
pool_job2solvables(Pool * pool,Queue * pkgs,Id how,Id what)4643 pool_job2solvables(Pool *pool, Queue *pkgs, Id how, Id what)
4644 {
4645 Id p, pp;
4646 how &= SOLVER_SELECTMASK;
4647 queue_empty(pkgs);
4648 if (how == SOLVER_SOLVABLE_ALL)
4649 {
4650 FOR_POOL_SOLVABLES(p)
4651 queue_push(pkgs, p);
4652 }
4653 else if (how == SOLVER_SOLVABLE_REPO)
4654 {
4655 Repo *repo = pool_id2repo(pool, what);
4656 Solvable *s;
4657 if (repo)
4658 {
4659 FOR_REPO_SOLVABLES(repo, p, s)
4660 queue_push(pkgs, p);
4661 }
4662 }
4663 else
4664 {
4665 FOR_JOB_SELECT(p, pp, how, what)
4666 queue_push(pkgs, p);
4667 }
4668 }
4669
4670 int
pool_isemptyupdatejob(Pool * pool,Id how,Id what)4671 pool_isemptyupdatejob(Pool *pool, Id how, Id what)
4672 {
4673 Id p, pp, pi, pip;
4674 Id select = how & SOLVER_SELECTMASK;
4675 if ((how & SOLVER_JOBMASK) != SOLVER_UPDATE)
4676 return 0;
4677 if (select == SOLVER_SOLVABLE_ALL || select == SOLVER_SOLVABLE_REPO)
4678 return 0;
4679 if (!pool->installed)
4680 return 1;
4681 FOR_JOB_SELECT(p, pp, select, what)
4682 if (pool->solvables[p].repo == pool->installed)
4683 return 0;
4684 /* hard work */
4685 FOR_JOB_SELECT(p, pp, select, what)
4686 {
4687 Solvable *s = pool->solvables + p;
4688 FOR_PROVIDES(pi, pip, s->name)
4689 {
4690 Solvable *si = pool->solvables + pi;
4691 if (si->repo != pool->installed || si->name != s->name)
4692 continue;
4693 return 0;
4694 }
4695 if (s->obsoletes)
4696 {
4697 Id obs, *obsp = s->repo->idarraydata + s->obsoletes;
4698 while ((obs = *obsp++) != 0)
4699 {
4700 FOR_PROVIDES(pi, pip, obs)
4701 {
4702 Solvable *si = pool->solvables + pi;
4703 if (si->repo != pool->installed)
4704 continue;
4705 if (!pool->obsoleteusesprovides && !pool_match_nevr(pool, si, obs))
4706 continue;
4707 if (pool->obsoleteusescolors && !pool_colormatch(pool, s, si))
4708 continue;
4709 return 0;
4710 }
4711 }
4712 }
4713 }
4714 return 1;
4715 }
4716
4717 int
solver_alternatives_count(Solver * solv)4718 solver_alternatives_count(Solver *solv)
4719 {
4720 Id *elements = solv->branches.elements;
4721 int res, count;
4722 for (res = 0, count = solv->branches.count; count; res++)
4723 count -= elements[count - 2];
4724 return res;
4725 }
4726
4727 int
solver_get_alternative(Solver * solv,Id alternative,Id * idp,Id * fromp,Id * chosenp,Queue * choices,int * levelp)4728 solver_get_alternative(Solver *solv, Id alternative, Id *idp, Id *fromp, Id *chosenp, Queue *choices, int *levelp)
4729 {
4730 int cnt = solver_alternatives_count(solv);
4731 int count = solv->branches.count;
4732 Id *elements = solv->branches.elements;
4733 if (choices)
4734 queue_empty(choices);
4735 if (alternative <= 0 || alternative > cnt)
4736 return 0;
4737 elements += count;
4738 for (; cnt > alternative; cnt--)
4739 elements -= elements[-2];
4740 if (levelp)
4741 *levelp = elements[-1];
4742 if (fromp)
4743 *fromp = elements[-4];
4744 if (idp)
4745 *idp = elements[-3];
4746 if (chosenp)
4747 {
4748 int i;
4749 *chosenp = 0;
4750 for (i = elements[-2]; i > 4; i--)
4751 {
4752 Id p = -elements[-i];
4753 if (p > 0 && solv->decisionmap[p] == elements[-1] + 1)
4754 {
4755 *chosenp = p;
4756 break;
4757 }
4758 }
4759 }
4760 if (choices)
4761 queue_insertn(choices, 0, elements[-2] - 4, elements - elements[-2]);
4762 return elements[-4] ? SOLVER_ALTERNATIVE_TYPE_RECOMMENDS : SOLVER_ALTERNATIVE_TYPE_RULE;
4763 }
4764
4765 const char *
solver_select2str(Pool * pool,Id select,Id what)4766 solver_select2str(Pool *pool, Id select, Id what)
4767 {
4768 const char *s;
4769 char *b;
4770 select &= SOLVER_SELECTMASK;
4771 if (select == SOLVER_SOLVABLE)
4772 return pool_solvid2str(pool, what);
4773 if (select == SOLVER_SOLVABLE_NAME)
4774 return pool_dep2str(pool, what);
4775 if (select == SOLVER_SOLVABLE_PROVIDES)
4776 {
4777 s = pool_dep2str(pool, what);
4778 b = pool_alloctmpspace(pool, 11 + strlen(s));
4779 sprintf(b, "providing %s", s);
4780 return b;
4781 }
4782 if (select == SOLVER_SOLVABLE_ONE_OF)
4783 {
4784 Id p;
4785 b = 0;
4786 while ((p = pool->whatprovidesdata[what++]) != 0)
4787 {
4788 s = pool_solvid2str(pool, p);
4789 if (b)
4790 b = pool_tmpappend(pool, b, ", ", s);
4791 else
4792 b = pool_tmpjoin(pool, s, 0, 0);
4793 pool_freetmpspace(pool, s);
4794 }
4795 return b ? b : "nothing";
4796 }
4797 if (select == SOLVER_SOLVABLE_REPO)
4798 {
4799 b = pool_alloctmpspace(pool, 20);
4800 sprintf(b, "repo #%d", what);
4801 return b;
4802 }
4803 if (select == SOLVER_SOLVABLE_ALL)
4804 return "all packages";
4805 return "unknown job select";
4806 }
4807
4808 const char *
pool_job2str(Pool * pool,Id how,Id what,Id flagmask)4809 pool_job2str(Pool *pool, Id how, Id what, Id flagmask)
4810 {
4811 Id select = how & SOLVER_SELECTMASK;
4812 const char *strstart = 0, *strend = 0;
4813 char *s;
4814 int o;
4815
4816 switch (how & SOLVER_JOBMASK)
4817 {
4818 case SOLVER_NOOP:
4819 return "do nothing";
4820 case SOLVER_INSTALL:
4821 if (select == SOLVER_SOLVABLE && pool->installed && pool->solvables[what].repo == pool->installed)
4822 strstart = "keep ", strend = " installed";
4823 else if (select == SOLVER_SOLVABLE || select == SOLVER_SOLVABLE_NAME)
4824 strstart = "install ";
4825 else if (select == SOLVER_SOLVABLE_PROVIDES)
4826 strstart = "install a package ";
4827 else
4828 strstart = "install one of ";
4829 break;
4830 case SOLVER_ERASE:
4831 if (select == SOLVER_SOLVABLE && !(pool->installed && pool->solvables[what].repo == pool->installed))
4832 strstart = "keep ", strend = " uninstalled";
4833 else if (select == SOLVER_SOLVABLE_PROVIDES)
4834 strstart = "deinstall all packages ";
4835 else
4836 strstart = "deinstall ";
4837 break;
4838 case SOLVER_UPDATE:
4839 strstart = "update ";
4840 break;
4841 case SOLVER_WEAKENDEPS:
4842 strstart = "weaken deps of ";
4843 break;
4844 case SOLVER_MULTIVERSION:
4845 strstart = "multi version ";
4846 break;
4847 case SOLVER_LOCK:
4848 strstart = "lock ";
4849 break;
4850 case SOLVER_DISTUPGRADE:
4851 strstart = "dist upgrade ";
4852 break;
4853 case SOLVER_VERIFY:
4854 strstart = "verify ";
4855 break;
4856 case SOLVER_DROP_ORPHANED:
4857 strstart = "deinstall ", strend = " if orphaned";
4858 break;
4859 case SOLVER_USERINSTALLED:
4860 strstart = "regard ", strend = " as userinstalled";
4861 break;
4862 case SOLVER_ALLOWUNINSTALL:
4863 strstart = "allow deinstallation of ";
4864 break;
4865 case SOLVER_FAVOR:
4866 strstart = "favor ";
4867 break;
4868 case SOLVER_DISFAVOR:
4869 strstart = "disfavor ";
4870 break;
4871 case SOLVER_BLACKLIST:
4872 strstart = "blacklist ";
4873 break;
4874 default:
4875 strstart = "unknown job ";
4876 break;
4877 }
4878 s = pool_tmpjoin(pool, strstart, solver_select2str(pool, select, what), strend);
4879 how &= flagmask;
4880 if ((how & ~(SOLVER_SELECTMASK|SOLVER_JOBMASK)) == 0)
4881 return s;
4882 o = strlen(s);
4883 s = pool_tmpappend(pool, s, " ", 0);
4884 if (how & SOLVER_WEAK)
4885 s = pool_tmpappend(pool, s, ",weak", 0);
4886 if (how & SOLVER_ESSENTIAL)
4887 s = pool_tmpappend(pool, s, ",essential", 0);
4888 if (how & SOLVER_CLEANDEPS)
4889 s = pool_tmpappend(pool, s, ",cleandeps", 0);
4890 if (how & SOLVER_ORUPDATE)
4891 s = pool_tmpappend(pool, s, ",orupdate", 0);
4892 if (how & SOLVER_FORCEBEST)
4893 s = pool_tmpappend(pool, s, ",forcebest", 0);
4894 if (how & SOLVER_TARGETED)
4895 s = pool_tmpappend(pool, s, ",targeted", 0);
4896 if (how & SOLVER_SETEV)
4897 s = pool_tmpappend(pool, s, ",setev", 0);
4898 if (how & SOLVER_SETEVR)
4899 s = pool_tmpappend(pool, s, ",setevr", 0);
4900 if (how & SOLVER_SETARCH)
4901 s = pool_tmpappend(pool, s, ",setarch", 0);
4902 if (how & SOLVER_SETVENDOR)
4903 s = pool_tmpappend(pool, s, ",setvendor", 0);
4904 if (how & SOLVER_SETREPO)
4905 s = pool_tmpappend(pool, s, ",setrepo", 0);
4906 if (how & SOLVER_SETNAME)
4907 s = pool_tmpappend(pool, s, ",setname", 0);
4908 if (how & SOLVER_NOAUTOSET)
4909 s = pool_tmpappend(pool, s, ",noautoset", 0);
4910 if (s[o + 1] != ',')
4911 s = pool_tmpappend(pool, s, ",?", 0);
4912 s[o + 1] = '[';
4913 return pool_tmpappend(pool, s, "]", 0);
4914 }
4915
4916 const char *
solver_alternative2str(Solver * solv,int type,Id id,Id from)4917 solver_alternative2str(Solver *solv, int type, Id id, Id from)
4918 {
4919 Pool *pool = solv->pool;
4920 if (type == SOLVER_ALTERNATIVE_TYPE_RECOMMENDS)
4921 {
4922 const char *s = pool_dep2str(pool, id);
4923 return pool_tmpappend(pool, s, ", recommended by ", pool_solvid2str(pool, from));
4924 }
4925 if (type == SOLVER_ALTERNATIVE_TYPE_RULE)
4926 {
4927 int rtype;
4928 Id depfrom, depto, dep;
4929 char buf[64];
4930 if (solver_ruleclass(solv, id) == SOLVER_RULE_CHOICE)
4931 id = solver_rule2pkgrule(solv, id);
4932 if (solver_ruleclass(solv, id) == SOLVER_RULE_RECOMMENDS)
4933 id = solver_rule2pkgrule(solv, id);
4934 rtype = solver_ruleinfo(solv, id, &depfrom, &depto, &dep);
4935 if ((rtype & SOLVER_RULE_TYPEMASK) == SOLVER_RULE_JOB)
4936 {
4937 if ((depto & SOLVER_SELECTMASK) == SOLVER_SOLVABLE_PROVIDES)
4938 return pool_dep2str(pool, dep);
4939 return solver_select2str(pool, depto & SOLVER_SELECTMASK, dep);
4940 }
4941 if (rtype == SOLVER_RULE_PKG_REQUIRES)
4942 {
4943 const char *s = pool_dep2str(pool, dep);
4944 return pool_tmpappend(pool, s, ", required by ", pool_solvid2str(pool, depfrom));
4945 }
4946 sprintf(buf, "Rule #%d", id);
4947 return pool_tmpjoin(pool, buf, 0, 0);
4948 }
4949 return "unknown alternative type";
4950 }
4951
4952