2 * Copyright (c) 2007-2009, Novell Inc.
4 * This program is licensed under the BSD license, read LICENSE.BSD
5 * for further information
20 #include "solver_private.h"
25 #include "solverdebug.h"
28 /**********************************************************************************/
30 /* a problem is an item on the solver's problem list. It can either be >0, in that
31 * case it is a update/infarch/dup rule, or it can be <0, which makes it refer to a job
32 * consisting of multiple job rules.
36 solver_disableproblem(Solver *solv, Id v)
44 if (v >= solv->infarchrules && v < solv->infarchrules_end)
46 Pool *pool = solv->pool;
47 Id name = pool->solvables[-solv->rules[v].p].name;
48 while (v > solv->infarchrules && pool->solvables[-solv->rules[v - 1].p].name == name)
50 for (; v < solv->infarchrules_end && pool->solvables[-solv->rules[v].p].name == name; v++)
51 solver_disablerule(solv, solv->rules + v);
54 if (v >= solv->duprules && v < solv->duprules_end)
56 Pool *pool = solv->pool;
57 Id name = pool->solvables[-solv->rules[v].p].name;
58 while (v > solv->duprules && pool->solvables[-solv->rules[v - 1].p].name == name)
60 for (; v < solv->duprules_end && pool->solvables[-solv->rules[v].p].name == name; v++)
61 solver_disablerule(solv, solv->rules + v);
64 solver_disablerule(solv, solv->rules + v);
66 /* XXX: doesn't work */
67 if (v >= solv->updaterules && v < solv->updaterules_end)
69 /* enable feature rule if we disabled the update rule */
70 r = solv->rules + (v - solv->updaterules + solv->featurerules);
72 solver_enablerule(solv, r);
78 jp = solv->ruletojob.elements;
79 for (i = solv->jobrules, r = solv->rules + i; i < solv->jobrules_end; i++, r++, jp++)
81 solver_disablerule(solv, r);
84 /*-------------------------------------------------------------------
89 solver_enableproblem(Solver *solv, Id v)
97 if (v >= solv->infarchrules && v < solv->infarchrules_end)
99 Pool *pool = solv->pool;
100 Id name = pool->solvables[-solv->rules[v].p].name;
101 while (v > solv->infarchrules && pool->solvables[-solv->rules[v - 1].p].name == name)
103 for (; v < solv->infarchrules_end && pool->solvables[-solv->rules[v].p].name == name; v++)
104 solver_enablerule(solv, solv->rules + v);
107 if (v >= solv->duprules && v < solv->duprules_end)
109 Pool *pool = solv->pool;
110 Id name = pool->solvables[-solv->rules[v].p].name;
111 while (v > solv->duprules && pool->solvables[-solv->rules[v - 1].p].name == name)
113 for (; v < solv->duprules_end && pool->solvables[-solv->rules[v].p].name == name; v++)
114 solver_enablerule(solv, solv->rules + v);
117 if (v >= solv->featurerules && v < solv->featurerules_end)
119 /* do not enable feature rule if update rule is enabled */
120 r = solv->rules + (v - solv->featurerules + solv->updaterules);
124 solver_enablerule(solv, solv->rules + v);
125 if (v >= solv->updaterules && v < solv->updaterules_end)
127 /* disable feature rule when enabling update rule */
128 r = solv->rules + (v - solv->updaterules + solv->featurerules);
130 solver_disablerule(solv, r);
135 jp = solv->ruletojob.elements;
136 for (i = solv->jobrules, r = solv->rules + i; i < solv->jobrules_end; i++, r++, jp++)
138 solver_enablerule(solv, r);
142 /*-------------------------------------------------------------------
145 * Reenable all disabled weak rules (marked in weakrulemap)
150 enableweakrules(Solver *solv)
155 if (!solv->weakrulemap.size)
157 for (i = 1, r = solv->rules + i; i < solv->learntrules; i++, r++)
159 if (r->d >= 0) /* already enabled? */
161 if (!MAPTST(&solv->weakrulemap, i))
163 solver_enablerule(solv, r);
165 /* make sure broken orphan rules stay disabled */
166 if (solv->brokenorphanrules)
167 for (i = 0; i < solv->brokenorphanrules->count; i++)
168 solver_disablerule(solv, solv->rules + solv->brokenorphanrules->elements[i]);
172 /*-------------------------------------------------------------------
176 * at this point, all rules that led to conflicts are disabled.
177 * we re-enable all rules of a problem set but rule "sug", then
178 * continue to disable more rules until there as again a solution.
181 /* FIXME: think about conflicting assertions */
184 refine_suggestion(Solver *solv, Id *problem, Id sug, Queue *refined, int essentialok)
186 Pool *pool = solv->pool;
192 IF_POOLDEBUG (SOLV_DEBUG_SOLUTIONS)
194 POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "refine_suggestion start\n");
195 for (i = 0; problem[i]; i++)
197 if (problem[i] == sug)
198 POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "=> ");
199 solver_printproblem(solv, problem[i]);
202 queue_empty(refined);
203 if (!essentialok && sug < 0 && (solv->job.elements[-sug - 1] & SOLVER_ESSENTIAL) != 0)
205 queue_init(&disabled);
206 queue_push(refined, sug);
208 /* re-enable all problem rules with the exception of "sug"(gestion) */
211 for (i = 0; problem[i]; i++)
212 if (problem[i] != sug)
213 solver_enableproblem(solv, problem[i]);
216 solver_reenablepolicyrules(solv, -sug);
217 else if (sug >= solv->updaterules && sug < solv->updaterules_end)
219 /* enable feature rule */
220 Rule *r = solv->rules + solv->featurerules + (sug - solv->updaterules);
222 solver_enablerule(solv, r);
225 enableweakrules(solv);
229 int njob, nfeature, nupdate, pass;
230 queue_empty(&solv->problems);
232 solver_run_sat(solv, 0, 0);
234 if (!solv->problems.count)
236 POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "no more problems!\n");
237 break; /* great, no more problems */
239 disabledcnt = disabled.count;
240 /* start with 1 to skip over proof index */
241 njob = nfeature = nupdate = 0;
242 for (pass = 0; pass < 2; pass++)
244 for (i = 1; i < solv->problems.count - 1; i++)
246 /* ignore solutions in refined */
247 v = solv->problems.elements[i];
249 break; /* end of problem reached */
252 /* check if v is in the given problems list
253 * we allow disabling all problem rules *after* sug in
254 * pass 2, to prevent getting the same solution twice */
255 for (j = 0; problem[j]; j++)
256 if (problem[j] == v || (pass && problem[j] == sug))
261 if (v >= solv->featurerules && v < solv->featurerules_end)
267 if (!essentialok && (solv->job.elements[-v - 1] & SOLVER_ESSENTIAL) != 0)
268 continue; /* not that one! */
271 queue_push(&disabled, v);
273 if (disabled.count != disabledcnt)
276 if (disabled.count == disabledcnt)
278 /* no solution found, this was an invalid suggestion! */
279 POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "no solution found!\n");
283 if (!njob && nupdate && nfeature)
285 /* got only update rules, filter out feature rules */
286 POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "throwing away feature rules\n");
287 for (i = j = disabledcnt; i < disabled.count; i++)
289 v = disabled.elements[i];
290 if (v < solv->featurerules || v >= solv->featurerules_end)
291 disabled.elements[j++] = v;
296 if (disabled.count == disabledcnt + 1)
298 /* just one suggestion, add it to refined list */
299 v = disabled.elements[disabledcnt];
300 if (!nfeature && v != sug)
301 queue_push(refined, v); /* do not record feature rules */
302 solver_disableproblem(solv, v);
303 if (v >= solv->updaterules && v < solv->updaterules_end)
305 Rule *r = solv->rules + (v - solv->updaterules + solv->featurerules);
307 solver_enablerule(solv, r); /* enable corresponding feature rule */
310 solver_reenablepolicyrules(solv, -v);
314 /* more than one solution, disable all */
315 /* do not push anything on refine list, as we do not know which solution to choose */
316 /* thus, the user will get another problem if he selects this solution, where he
317 * can choose the right one */
318 IF_POOLDEBUG (SOLV_DEBUG_SOLUTIONS)
320 POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "more than one solution found:\n");
321 for (i = disabledcnt; i < disabled.count; i++)
322 solver_printproblem(solv, disabled.elements[i]);
324 for (i = disabledcnt; i < disabled.count; i++)
326 v = disabled.elements[i];
327 solver_disableproblem(solv, v);
328 if (v >= solv->updaterules && v < solv->updaterules_end)
330 Rule *r = solv->rules + (v - solv->updaterules + solv->featurerules);
332 solver_enablerule(solv, r);
337 /* all done, get us back into the same state as before */
338 /* enable refined rules again */
339 for (i = 0; i < disabled.count; i++)
340 solver_enableproblem(solv, disabled.elements[i]);
341 queue_free(&disabled);
342 /* reset policy rules */
343 for (i = 0; problem[i]; i++)
344 solver_enableproblem(solv, problem[i]);
345 solver_disablepolicyrules(solv);
346 /* disable problem rules again */
347 for (i = 0; problem[i]; i++)
348 solver_disableproblem(solv, problem[i]);
349 POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "refine_suggestion end\n");
353 /*-------------------------------------------------------------------
354 * sorting helper for problems
356 * bring update rules before job rules
357 * make essential job rules last
361 problems_sortcmp(const void *ap, const void *bp, void *dp)
364 Id a = *(Id *)ap, b = *(Id *)bp;
371 int af = job->elements[-a - 1] & SOLVER_ESSENTIAL;
372 int bf = job->elements[-b - 1] & SOLVER_ESSENTIAL;
381 * convert a solution rule into a job modifier
384 convertsolution(Solver *solv, Id why, Queue *solutionq)
386 Pool *pool = solv->pool;
390 if (why < solv->pooljobcnt)
392 queue_push(solutionq, SOLVER_SOLUTION_POOLJOB);
393 queue_push(solutionq, why);
397 queue_push(solutionq, SOLVER_SOLUTION_JOB);
398 queue_push(solutionq, why - solv->pooljobcnt);
402 if (why >= solv->infarchrules && why < solv->infarchrules_end)
405 /* infarch rule, find replacement */
406 assert(solv->rules[why].p < 0);
407 name = pool->solvables[-solv->rules[why].p].name;
408 while (why > solv->infarchrules && pool->solvables[-solv->rules[why - 1].p].name == name)
411 for (; why < solv->infarchrules_end && pool->solvables[-solv->rules[why].p].name == name; why++)
412 if (solv->decisionmap[-solv->rules[why].p] > 0)
414 p = -solv->rules[why].p;
418 return; /* false alarm */
419 queue_push(solutionq, SOLVER_SOLUTION_INFARCH);
420 queue_push(solutionq, p);
423 if (why >= solv->duprules && why < solv->duprules_end)
426 /* dist upgrade rule, find replacement */
427 assert(solv->rules[why].p < 0);
428 name = pool->solvables[-solv->rules[why].p].name;
429 while (why > solv->duprules && pool->solvables[-solv->rules[why - 1].p].name == name)
432 for (; why < solv->duprules_end && pool->solvables[-solv->rules[why].p].name == name; why++)
433 if (solv->decisionmap[-solv->rules[why].p] > 0)
435 p = -solv->rules[why].p;
439 return; /* false alarm */
440 queue_push(solutionq, SOLVER_SOLUTION_DISTUPGRADE);
441 queue_push(solutionq, p);
444 if (why >= solv->updaterules && why < solv->updaterules_end)
446 /* update rule, find replacement package */
450 /* check if this is a false positive, i.e. the update rule is fulfilled */
451 rr = solv->rules + why;
452 FOR_RULELITERALS(p, pp, rr)
453 if (p > 0 && solv->decisionmap[p] > 0)
454 return; /* false alarm */
456 p = solv->installed->start + (why - solv->updaterules);
457 if (solv->decisionmap[p] > 0)
458 return; /* false alarm, turned out we can keep the package */
459 rr = solv->rules + solv->featurerules + (why - solv->updaterules);
461 rr = solv->rules + why;
464 int mvrp = 0; /* multi-version replacement */
465 FOR_RULELITERALS(rp, pp, rr)
467 if (rp > 0 && solv->decisionmap[rp] > 0 && pool->solvables[rp].repo != solv->installed)
470 if (!(solv->multiversion.size && MAPTST(&solv->multiversion, rp)))
476 /* found only multi-version replacements */
477 /* have to split solution into two parts */
478 queue_push(solutionq, p);
479 queue_push(solutionq, mvrp);
482 queue_push(solutionq, p);
483 queue_push(solutionq, rp);
486 if (why >= solv->bestrules && why < solv->bestrules_end)
491 /* check false positive */
492 rr = solv->rules + why;
493 FOR_RULELITERALS(p, pp, rr)
494 if (p > 0 && solv->decisionmap[p] > 0)
495 return; /* false alarm */
496 /* check update/feature rule */
497 p = solv->bestrules_pkg[why - solv->bestrules];
501 queue_push(solutionq, 0);
502 queue_push(solutionq, solv->ruletojob.elements[-p - solv->jobrules] + 1);
505 if (solv->decisionmap[p] > 0)
507 /* disable best rule by keeping the old package */
508 queue_push(solutionq, SOLVER_SOLUTION_BEST);
509 queue_push(solutionq, p);
512 rr = solv->rules + solv->featurerules + (p - solv->installed->start);
514 rr = solv->rules + solv->updaterules + (p - solv->installed->start);
515 mvrp = 0; /* multi-version replacement */
516 FOR_RULELITERALS(rp, pp, rr)
517 if (rp > 0 && solv->decisionmap[rp] > 0 && pool->solvables[rp].repo != solv->installed)
520 if (!(solv->multiversion.size && MAPTST(&solv->multiversion, rp)))
525 queue_push(solutionq, SOLVER_SOLUTION_BEST); /* split, see above */
526 queue_push(solutionq, mvrp);
527 queue_push(solutionq, p);
528 queue_push(solutionq, 0);
533 queue_push(solutionq, SOLVER_SOLUTION_BEST);
534 queue_push(solutionq, rp);
541 * convert problem data into a form usable for refining.
542 * Returns the number of problems.
545 solver_prepare_solutions(Solver *solv)
549 if (!solv->problems.count)
551 queue_empty(&solv->solutions);
552 queue_push(&solv->solutions, 0); /* dummy so idx is always nonzero */
553 idx = solv->solutions.count;
554 queue_push(&solv->solutions, -1); /* unrefined */
555 /* proofidx stays in position, thus we start with 1 */
556 for (i = 1; i < solv->problems.count; i++)
558 Id p = solv->problems.elements[i];
559 queue_push(&solv->solutions, p);
562 /* end of problem reached */
563 solv->problems.elements[j++] = idx;
564 if (i + 1 >= solv->problems.count)
566 /* start another problem */
567 solv->problems.elements[j++] = solv->problems.elements[++i]; /* copy proofidx */
568 idx = solv->solutions.count;
569 queue_push(&solv->solutions, -1); /* unrefined */
571 solv->problems.count = j;
576 * refine the simple solution rule list provided by
577 * the solver into multiple lists of job modifiers.
580 create_solutions(Solver *solv, int probnr, int solidx)
582 Pool *pool = solv->pool;
584 Queue problem, solution, problems_save, branches_save, decisionq_reason_save;
588 int oldmistakes = solv->cleandeps_mistakes ? solv->cleandeps_mistakes->count : 0;
591 now = solv_timems(0);
593 /* save decisionq, decisionq_why, decisionmap, and decisioncnt */
594 for (i = 0; i < solv->decisionq.count; i++)
596 Id p = solv->decisionq.elements[i];
597 queue_push(&redoq, p);
598 queue_push(&redoq, solv->decisionq_why.elements[i]);
599 queue_push(&redoq, solv->decisionmap[p > 0 ? p : -p]);
602 /* save problems queue */
603 problems_save = solv->problems;
604 memset(&solv->problems, 0, sizeof(solv->problems));
606 /* save branches queue */
607 branches_save = solv->problems;
608 memset(&solv->branches, 0, sizeof(solv->branches));
610 /* save decisionq_reason */
611 decisionq_reason_save = solv->decisionq_reason;
612 memset(&solv->decisionq_reason, 0, sizeof(solv->decisionq_reason));
614 /* extract problem from queue */
615 queue_init(&problem);
616 for (i = solidx + 1; i < solv->solutions.count; i++)
618 Id v = solv->solutions.elements[i];
621 queue_push(&problem, v);
623 extraflags &= solv->job.elements[-v - 1];
625 if (extraflags == -1)
627 if (problem.count > 1)
628 solv_sort(problem.elements, problem.count, sizeof(Id), problems_sortcmp, &solv->job);
629 queue_push(&problem, 0); /* mark end for refine_suggestion */
632 for (i = 0; i < problem.count; i++)
633 printf("PP %d %d\n", i, problem.elements[i]);
636 /* refine each solution element */
639 queue_init(&solution);
640 for (i = 0; i < problem.count; i++)
642 int solstart = solv->solutions.count;
643 refine_suggestion(solv, problem.elements, problem.elements[i], &solution, essentialok);
644 queue_push(&solv->solutions, 0); /* reserve room for number of elements */
645 for (j = 0; j < solution.count; j++)
646 convertsolution(solv, solution.elements[j], &solv->solutions);
647 if (solv->solutions.count == solstart + 1)
649 solv->solutions.count--; /* this one did not work out */
650 if (nsol || i + 1 < problem.count)
651 continue; /* got one or still hope */
654 /* nothing found, start over */
655 POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "nothing found, re-run with essentialok = 1\n");
660 /* this is bad, we found no solution */
661 /* for now just offer a rule */
662 POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "nothing found, already did essentialok, fake it\n");
663 queue_push(&solv->solutions, 0);
664 for (j = 0; j < problem.count; j++)
666 convertsolution(solv, problem.elements[j], &solv->solutions);
667 if (solv->solutions.count > solstart + 1)
670 if (solv->solutions.count == solstart + 1)
672 solv->solutions.count--;
673 continue; /* sorry */
676 /* patch in number of solution elements */
677 solv->solutions.elements[solstart] = (solv->solutions.count - (solstart + 1)) / 2;
678 queue_push(&solv->solutions, 0); /* add end marker */
679 queue_push(&solv->solutions, 0); /* add end marker */
680 queue_push(&solv->solutions, problem.elements[i]); /* just for bookkeeping */
681 queue_push(&solv->solutions, extraflags & SOLVER_CLEANDEPS); /* our extraflags */
682 solv->solutions.elements[solidx + 1 + nsol++] = solstart;
684 solv->solutions.elements[solidx + 1 + nsol] = 0; /* end marker */
685 solv->solutions.elements[solidx] = nsol;
686 queue_free(&problem);
687 queue_free(&solution);
689 /* restore decisions */
690 memset(solv->decisionmap, 0, pool->nsolvables * sizeof(Id));
691 queue_empty(&solv->decisionq);
692 queue_empty(&solv->decisionq_why);
693 for (i = 0; i < redoq.count; i += 3)
695 Id p = redoq.elements[i];
696 queue_push(&solv->decisionq, p);
697 queue_push(&solv->decisionq_why, redoq.elements[i + 1]);
698 solv->decisionmap[p > 0 ? p : -p] = redoq.elements[i + 2];
702 /* restore decision reasons */
703 queue_free(&solv->decisionq_reason);
704 solv->decisionq_reason = decisionq_reason_save;
706 /* restore problems */
707 queue_free(&solv->problems);
708 solv->problems = problems_save;
710 /* restore branches */
711 queue_free(&solv->branches);
712 solv->branches = branches_save;
714 if (solv->cleandeps_mistakes)
717 queue_truncate(solv->cleandeps_mistakes, oldmistakes);
720 queue_free(solv->cleandeps_mistakes);
721 solv->cleandeps_mistakes = solv_free(solv->cleandeps_mistakes);
725 POOL_DEBUG(SOLV_DEBUG_STATS, "create_solutions for problem #%d took %d ms\n", probnr, solv_timems(now));
729 /**************************************************************************/
732 solver_problem_count(Solver *solv)
734 return solv->problems.count / 2;
738 solver_next_problem(Solver *solv, Id problem)
741 return solv->problems.count ? 1 : 0;
742 return (problem + 1) * 2 - 1 < solv->problems.count ? problem + 1 : 0;
746 solver_solution_count(Solver *solv, Id problem)
748 Id solidx = solv->problems.elements[problem * 2 - 1];
749 if (solv->solutions.elements[solidx] < 0)
750 create_solutions(solv, problem, solidx);
751 return solv->solutions.elements[solidx];
755 solver_next_solution(Solver *solv, Id problem, Id solution)
757 Id solidx = solv->problems.elements[problem * 2 - 1];
758 if (solv->solutions.elements[solidx] < 0)
759 create_solutions(solv, problem, solidx);
760 return solv->solutions.elements[solidx + solution + 1] ? solution + 1 : 0;
764 solver_solutionelement_count(Solver *solv, Id problem, Id solution)
766 Id solidx = solv->problems.elements[problem * 2 - 1];
767 solidx = solv->solutions.elements[solidx + solution];
768 return solv->solutions.elements[solidx];
772 solver_solutionelement_internalid(Solver *solv, Id problem, Id solution)
774 Id solidx = solv->problems.elements[problem * 2 - 1];
775 solidx = solv->solutions.elements[solidx + solution];
776 return solv->solutions.elements[solidx + 2 * solv->solutions.elements[solidx] + 3];
780 solver_solutionelement_extrajobflags(Solver *solv, Id problem, Id solution)
782 Id solidx = solv->problems.elements[problem * 2 - 1];
783 solidx = solv->solutions.elements[solidx + solution];
784 return solv->solutions.elements[solidx + 2 * solv->solutions.elements[solidx] + 4];
789 * return the next item of the proposed solution
790 * here are the possibilities for p / rp and what
791 * the solver expects the application to do:
793 * -------------------------------------------------------
794 * SOLVER_SOLUTION_INFARCH pkgid
795 * -> add (SOLVER_INSTALL|SOLVER_SOLVABLE, rp) to the job
796 * SOLVER_SOLUTION_DISTUPGRADE pkgid
797 * -> add (SOLVER_INSTALL|SOLVER_SOLVABLE, rp) to the job
798 * SOLVER_SOLUTION_BEST pkgid
799 * -> add (SOLVER_INSTALL|SOLVER_SOLVABLE, rp) to the job
800 * SOLVER_SOLUTION_JOB jobidx
801 * -> remove job (jobidx - 1, jobidx) from job queue
802 * SOLVER_SOLUTION_POOLJOB jobidx
803 * -> remove job (jobidx - 1, jobidx) from pool job queue
805 * -> add (SOLVER_ERASE|SOLVER_SOLVABLE, p) to the job
806 * pkgid (> 0) pkgid (> 0)
807 * -> add (SOLVER_INSTALL|SOLVER_SOLVABLE, rp) to the job
808 * (this will replace package p)
810 * Thus, the solver will either ask the application to remove
811 * a specific job from the job queue, or ask to add an install/erase
817 solver_next_solutionelement(Solver *solv, Id problem, Id solution, Id element, Id *p, Id *rp)
819 Id solidx = solv->problems.elements[problem * 2 - 1];
820 solidx = solv->solutions.elements[solidx + solution];
823 solidx += 1 + element * 2;
824 if (!solv->solutions.elements[solidx] && !solv->solutions.elements[solidx + 1])
826 *p = solv->solutions.elements[solidx];
827 *rp = solv->solutions.elements[solidx + 1];
832 solver_take_solutionelement(Solver *solv, Id p, Id rp, Id extrajobflags, Queue *job)
836 if (p == SOLVER_SOLUTION_POOLJOB)
838 solv->pool->pooljobs.elements[rp - 1] = SOLVER_NOOP;
839 solv->pool->pooljobs.elements[rp] = 0;
842 if (p == SOLVER_SOLUTION_JOB)
844 job->elements[rp - 1] = SOLVER_NOOP;
845 job->elements[rp] = 0;
848 if (rp <= 0 && p <= 0)
849 return; /* just in case */
851 p = SOLVER_INSTALL|SOLVER_SOLVABLE|SOLVER_NOTBYUSER|extrajobflags;
855 p = SOLVER_ERASE|SOLVER_SOLVABLE|extrajobflags;
857 for (i = 0; i < job->count; i += 2)
858 if (job->elements[i] == p && job->elements[i + 1] == rp)
860 queue_push2(job, p, rp);
864 solver_take_solution(Solver *solv, Id problem, Id solution, Queue *job)
866 Id p, rp, element = 0;
867 Id extrajobflags = solver_solutionelement_extrajobflags(solv, problem, solution);
868 while ((element = solver_next_solutionelement(solv, problem, solution, element, &p, &rp)) != 0)
869 solver_take_solutionelement(solv, p, rp, extrajobflags, job);
873 /*-------------------------------------------------------------------
879 findproblemrule_internal(Solver *solv, Id idx, Id *reqrp, Id *conrp, Id *sysrp, Id *jobrp, Map *rseen)
882 Id lreqr, lconr, lsysr, ljobr;
885 int i, reqset = 0; /* 0: unset, 1: installed, 2: jobassert, 3: assert */
886 int conset = 0; /* 0: unset, 1: installed */
888 /* find us a jobassert rule */
889 for (i = idx; (rid = solv->learnt_pool.elements[i]) != 0; i++)
891 if (rid < solv->jobrules || rid >= solv->jobrules_end)
893 r = solv->rules + rid;
894 d = r->d < 0 ? -r->d - 1 : r->d;
895 if (!d && r->w2 == 0 && r->p > 0)
902 /* the problem rules are somewhat ordered from "near to the problem" to
903 * "near to the job" */
904 lreqr = lconr = lsysr = ljobr = 0;
905 while ((rid = solv->learnt_pool.elements[idx++]) != 0)
908 if (rid >= solv->learntrules)
910 if (MAPTST(rseen, rid - solv->learntrules))
912 MAPSET(rseen, rid - solv->learntrules);
913 findproblemrule_internal(solv, solv->learnt_why.elements[rid - solv->learntrules], &lreqr, &lconr, &lsysr, &ljobr, rseen);
915 else if ((rid >= solv->jobrules && rid < solv->jobrules_end) || (rid >= solv->infarchrules && rid < solv->infarchrules_end) || (rid >= solv->duprules && rid < solv->duprules_end) || (rid >= solv->bestrules && rid < solv->bestrules_end) || (rid >= solv->yumobsrules && rid <= solv->yumobsrules_end))
920 else if (rid >= solv->updaterules && rid < solv->updaterules_end)
927 assert(rid < solv->pkgrules_end);
928 r = solv->rules + rid;
929 d = r->d < 0 ? -r->d - 1 : r->d;
932 /* prefer conflicts of installed packages */
933 if (solv->installed && !conset)
935 if (r->p < 0 && (solv->pool->solvables[-r->p].repo == solv->installed ||
936 solv->pool->solvables[-r->w2].repo == solv->installed))
947 if (!d && r->w2 == 0 && reqset < 3)
949 if (*reqrp > 0 && r->p < -1)
951 Pool *pool = solv->pool;
952 Id op = -solv->rules[*reqrp].p;
953 if (op > 1 && pool->solvables[op].arch != pool->solvables[-r->p].arch &&
954 pool->solvables[op].arch != pool->noarchid &&
955 pool->solvables[-r->p].arch != pool->noarchid)
956 continue; /* different arch, skip */
958 /* prefer assertions */
962 else if (jobassert && r->p == -jobassert)
964 /* prefer rules of job assertions */
968 else if (solv->installed && r->p < 0 && solv->pool->solvables[-r->p].repo == solv->installed && reqset <= 1)
970 /* prefer rules of job installed package so that the user doesn't get confused by strange packages */
979 if (!*reqrp && lreqr)
981 if (!*conrp && lconr)
983 if (!*jobrp && ljobr)
985 if (!*sysrp && lsysr)
992 * search for a rule that describes the problem to the
993 * user. Actually a pretty hopeless task that may leave the user
994 * puzzled. To get all of the needed information use
995 * solver_findallproblemrules() instead.
999 solver_findproblemrule(Solver *solv, Id problem)
1001 Id reqr, conr, sysr, jobr;
1002 Id idx = solv->problems.elements[2 * problem - 2];
1004 reqr = conr = sysr = jobr = 0;
1005 map_init(&rseen, solv->learntrules ? solv->nrules - solv->learntrules : 0);
1006 findproblemrule_internal(solv, idx, &reqr, &conr, &sysr, &jobr, &rseen);
1008 /* check if the request is about a not-installed package requiring a installed
1009 * package conflicting with the non-installed package. In that case return the conflict */
1010 if (reqr && conr && solv->installed && solv->rules[reqr].p < 0 && solv->rules[conr].p < 0 && solv->rules[conr].w2 < 0)
1012 Pool *pool = solv->pool;
1013 Solvable *s = pool->solvables - solv->rules[reqr].p;
1014 Solvable *s1 = pool->solvables - solv->rules[conr].p;
1015 Solvable *s2 = pool->solvables - solv->rules[conr].w2;
1017 if (s == s1 && s2->repo == solv->installed)
1018 cp = -solv->rules[conr].w2;
1019 else if (s == s2 && s1->repo == solv->installed)
1020 cp = -solv->rules[conr].p;
1021 if (cp && s1->name != s2->name && s->repo != solv->installed)
1024 Rule *r = solv->rules + reqr;
1025 FOR_RULELITERALS(p, pp, r)
1031 return reqr; /* some requires */
1033 return conr; /* some conflict */
1035 return sysr; /* an update rule */
1037 return jobr; /* a user request */
1042 /*-------------------------------------------------------------------*/
1045 findallproblemrules_internal(Solver *solv, Id idx, Queue *rules, Map *rseen)
1048 while ((rid = solv->learnt_pool.elements[idx++]) != 0)
1050 if (rid >= solv->learntrules)
1052 if (MAPTST(rseen, rid - solv->learntrules))
1054 MAPSET(rseen, rid - solv->learntrules);
1055 findallproblemrules_internal(solv, solv->learnt_why.elements[rid - solv->learntrules], rules, rseen);
1058 queue_pushunique(rules, rid);
1063 * find all problem rule
1065 * return all rules that lead to the problem. This gives the user
1066 * all of the information to understand the problem, but the result
1067 * can be a large number of rules.
1071 solver_findallproblemrules(Solver *solv, Id problem, Queue *rules)
1075 map_init(&rseen, solv->learntrules ? solv->nrules - solv->learntrules : 0);
1076 findallproblemrules_internal(solv, solv->problems.elements[2 * problem - 2], rules, &rseen);
1081 solver_problemruleinfo2str(Solver *solv, SolverRuleinfo type, Id source, Id target, Id dep)
1083 Pool *pool = solv->pool;
1088 case SOLVER_RULE_DISTUPGRADE:
1089 return pool_tmpjoin(pool, pool_solvid2str(pool, source), " does not belong to a distupgrade repository", 0);
1090 case SOLVER_RULE_INFARCH:
1091 return pool_tmpjoin(pool, pool_solvid2str(pool, source), " has inferior architecture", 0);
1092 case SOLVER_RULE_UPDATE:
1093 return pool_tmpjoin(pool, "problem with installed package ", pool_solvid2str(pool, source), 0);
1094 case SOLVER_RULE_JOB:
1095 return "conflicting requests";
1096 case SOLVER_RULE_JOB_UNSUPPORTED:
1097 return "unsupported request";
1098 case SOLVER_RULE_JOB_NOTHING_PROVIDES_DEP:
1099 return pool_tmpjoin(pool, "nothing provides requested ", pool_dep2str(pool, dep), 0);
1100 case SOLVER_RULE_JOB_UNKNOWN_PACKAGE:
1101 return pool_tmpjoin(pool, "package ", pool_dep2str(pool, dep), " does not exist");
1102 case SOLVER_RULE_JOB_PROVIDED_BY_SYSTEM:
1103 return pool_tmpjoin(pool, pool_dep2str(pool, dep), " is provided by the system", 0);
1104 case SOLVER_RULE_PKG:
1105 return "some dependency problem";
1106 case SOLVER_RULE_BEST:
1108 return pool_tmpjoin(pool, "cannot install the best update candidate for package ", pool_solvid2str(pool, source), 0);
1109 return "cannot install the best candidate for the job";
1110 case SOLVER_RULE_PKG_NOT_INSTALLABLE:
1111 ss = pool->solvables + source;
1112 if (pool_disabled_solvable(pool, ss))
1113 return pool_tmpjoin(pool, "package ", pool_solvid2str(pool, source), " is disabled");
1114 if (ss->arch && ss->arch != ARCH_SRC && ss->arch != ARCH_NOSRC &&
1115 pool->id2arch && (ss->arch > pool->lastarch || !pool->id2arch[ss->arch]))
1116 return pool_tmpjoin(pool, "package ", pool_solvid2str(pool, source), " does not have a compatible architecture");
1117 return pool_tmpjoin(pool, "package ", pool_solvid2str(pool, source), " is not installable");
1118 case SOLVER_RULE_PKG_NOTHING_PROVIDES_DEP:
1119 s = pool_tmpjoin(pool, "nothing provides ", pool_dep2str(pool, dep), 0);
1120 return pool_tmpappend(pool, s, " needed by ", pool_solvid2str(pool, source));
1121 case SOLVER_RULE_PKG_SAME_NAME:
1122 s = pool_tmpjoin(pool, "cannot install both ", pool_solvid2str(pool, source), 0);
1123 return pool_tmpappend(pool, s, " and ", pool_solvid2str(pool, target));
1124 case SOLVER_RULE_PKG_CONFLICTS:
1125 s = pool_tmpjoin(pool, "package ", pool_solvid2str(pool, source), 0);
1126 s = pool_tmpappend(pool, s, " conflicts with ", pool_dep2str(pool, dep));
1127 return pool_tmpappend(pool, s, " provided by ", pool_solvid2str(pool, target));
1128 case SOLVER_RULE_PKG_OBSOLETES:
1129 s = pool_tmpjoin(pool, "package ", pool_solvid2str(pool, source), 0);
1130 s = pool_tmpappend(pool, s, " obsoletes ", pool_dep2str(pool, dep));
1131 return pool_tmpappend(pool, s, " provided by ", pool_solvid2str(pool, target));
1132 case SOLVER_RULE_PKG_INSTALLED_OBSOLETES:
1133 s = pool_tmpjoin(pool, "installed package ", pool_solvid2str(pool, source), 0);
1134 s = pool_tmpappend(pool, s, " obsoletes ", pool_dep2str(pool, dep));
1135 return pool_tmpappend(pool, s, " provided by ", pool_solvid2str(pool, target));
1136 case SOLVER_RULE_PKG_IMPLICIT_OBSOLETES:
1137 s = pool_tmpjoin(pool, "package ", pool_solvid2str(pool, source), 0);
1138 s = pool_tmpappend(pool, s, " implicitly obsoletes ", pool_dep2str(pool, dep));
1139 return pool_tmpappend(pool, s, " provided by ", pool_solvid2str(pool, target));
1140 case SOLVER_RULE_PKG_REQUIRES:
1141 s = pool_tmpjoin(pool, "package ", pool_solvid2str(pool, source), " requires ");
1142 return pool_tmpappend(pool, s, pool_dep2str(pool, dep), ", but none of the providers can be installed");
1143 case SOLVER_RULE_PKG_SELF_CONFLICT:
1144 s = pool_tmpjoin(pool, "package ", pool_solvid2str(pool, source), " conflicts with ");
1145 return pool_tmpappend(pool, s, pool_dep2str(pool, dep), " provided by itself");
1146 case SOLVER_RULE_YUMOBS:
1147 s = pool_tmpjoin(pool, "both package ", pool_solvid2str(pool, source), " and ");
1148 s = pool_tmpjoin(pool, s, pool_solvid2str(pool, target), " obsolete ");
1149 return pool_tmpappend(pool, s, pool_dep2str(pool, dep), 0);
1151 return "bad problem rule type";
1155 /* convenience function */
1157 solver_problem2str(Solver *solv, Id problem)
1159 Id type, source, target, dep;
1160 Id r = solver_findproblemrule(solv, problem);
1162 return "no problem rule?";
1163 type = solver_ruleinfo(solv, r, &source, &target, &dep);
1164 return solver_problemruleinfo2str(solv, type, source, target, dep);
1168 solver_solutionelement2str(Solver *solv, Id p, Id rp)
1170 Pool *pool = solv->pool;
1171 if (p == SOLVER_SOLUTION_JOB || p == SOLVER_SOLUTION_POOLJOB)
1174 if (p == SOLVER_SOLUTION_JOB)
1175 rp += solv->pooljobcnt;
1176 how = solv->job.elements[rp - 1];
1177 what = solv->job.elements[rp];
1178 return pool_tmpjoin(pool, "do not ask to ", pool_job2str(pool, how, what, 0), 0);
1180 else if (p == SOLVER_SOLUTION_INFARCH)
1182 Solvable *s = pool->solvables + rp;
1183 if (solv->installed && s->repo == solv->installed)
1184 return pool_tmpjoin(pool, "keep ", pool_solvable2str(pool, s), " despite the inferior architecture");
1186 return pool_tmpjoin(pool, "install ", pool_solvable2str(pool, s), " despite the inferior architecture");
1188 else if (p == SOLVER_SOLUTION_DISTUPGRADE)
1190 Solvable *s = pool->solvables + rp;
1191 if (solv->installed && s->repo == solv->installed)
1192 return pool_tmpjoin(pool, "keep obsolete ", pool_solvable2str(pool, s), 0);
1194 return pool_tmpjoin(pool, "install ", pool_solvable2str(pool, s), " from excluded repository");
1196 else if (p == SOLVER_SOLUTION_BEST)
1198 Solvable *s = pool->solvables + rp;
1199 if (solv->installed && s->repo == solv->installed)
1200 return pool_tmpjoin(pool, "keep old ", pool_solvable2str(pool, s), 0);
1202 return pool_tmpjoin(pool, "install ", pool_solvable2str(pool, s), " despite the old version");
1204 else if (p > 0 && rp == 0)
1205 return pool_tmpjoin(pool, "allow deinstallation of ", pool_solvid2str(pool, p), 0);
1206 else if (p > 0 && rp > 0)
1208 const char *sp = pool_solvid2str(pool, p);
1209 const char *srp = pool_solvid2str(pool, rp);
1210 const char *str = pool_tmpjoin(pool, "allow replacement of ", sp, 0);
1211 return pool_tmpappend(pool, str, " with ", srp);
1214 return "bad solution element";