/* * Copyright (c) 2007-2008, Novell Inc. * * This program is licensed under the BSD license, read LICENSE.BSD * for further information */ /* * solver.c * * SAT based dependency solver */ #include #include #include #include #include #include "solver.h" #include "solver_private.h" #include "bitmap.h" #include "pool.h" #include "util.h" #include "policy.h" #include "poolarch.h" #include "solverdebug.h" #define RULES_BLOCK 63 /******************************************************************** * * dependency check helpers * */ /*------------------------------------------------------------------- * handle split provides * * a splitprovides dep looks like * namespace:splitprovides(pkg REL_WITH path) * and is only true if pkg is installed and contains the specified path. * we also make sure that pkg is selected for an update, otherwise the * update would always be forced onto the user. */ int solver_splitprovides(Solver *solv, Id dep) { Pool *pool = solv->pool; Id p, pp; Reldep *rd; Solvable *s; if (!solv->dosplitprovides || !solv->installed || (!solv->updatemap_all && !solv->updatemap.size)) return 0; if (!ISRELDEP(dep)) return 0; rd = GETRELDEP(pool, dep); if (rd->flags != REL_WITH) return 0; /* * things are a bit tricky here if pool->addedprovides == 1, because most split-provides are in * a non-standard location. If we simply call pool_whatprovides, we'll drag in the complete * file list. Instead we rely on pool_addfileprovides ignoring the addfileprovidesfiltered flag * for installed packages and check the lazywhatprovidesq (ignoring the REL_WITH part, but * we filter the package name further down anyway). */ if (pool->addedfileprovides == 1 && !ISRELDEP(rd->evr) && !pool->whatprovides[rd->evr]) pp = pool_searchlazywhatprovidesq(pool, rd->evr); else pp = pool_whatprovides(pool, dep); while ((p = pool->whatprovidesdata[pp++]) != 0) { /* here we have packages that provide the correct name and contain the path, * now do extra filtering */ s = pool->solvables + p; if (s->repo == solv->installed && s->name == rd->name && (solv->updatemap_all || (solv->updatemap.size && MAPTST(&solv->updatemap, p - solv->installed->start)))) return 1; } return 0; } /*------------------------------------------------------------------- * solver_dep_installed */ int solver_dep_installed(Solver *solv, Id dep) { #if 0 Pool *pool = solv->pool; Id p, pp; if (ISRELDEP(dep)) { Reldep *rd = GETRELDEP(pool, dep); if (rd->flags == REL_AND) { if (!solver_dep_installed(solv, rd->name)) return 0; return solver_dep_installed(solv, rd->evr); } if (rd->flags == REL_NAMESPACE && rd->name == NAMESPACE_INSTALLED) return solver_dep_installed(solv, rd->evr); } FOR_PROVIDES(p, pp, dep) { if (p == SYSTEMSOLVABLE || (solv->installed && pool->solvables[p].repo == solv->installed)) return 1; } #endif return 0; } /* mirrors solver_dep_installed, but returns 2 if a * dependency listed in solv->installsuppdepq was involved */ static int solver_check_installsuppdepq_dep(Solver *solv, Id dep) { Pool *pool = solv->pool; Id p, pp; Queue *q; if (ISRELDEP(dep)) { Reldep *rd = GETRELDEP(pool, dep); if (rd->flags == REL_AND) { int r2, r1 = solver_check_installsuppdepq_dep(solv, rd->name); if (!r1) return 0; r2 = solver_check_installsuppdepq_dep(solv, rd->evr); if (!r2) return 0; return r1 == 2 || r2 == 2 ? 2 : 1; } if (rd->flags == REL_OR) { int r2, r1 = solver_check_installsuppdepq_dep(solv, rd->name); r2 = solver_check_installsuppdepq_dep(solv, rd->evr); if (!r1 && !r2) return 0; return r1 == 2 || r2 == 2 ? 2 : 1; } if (rd->flags == REL_NAMESPACE && rd->name == NAMESPACE_SPLITPROVIDES) return solver_splitprovides(solv, rd->evr); if (rd->flags == REL_NAMESPACE && rd->name == NAMESPACE_INSTALLED) return solver_dep_installed(solv, rd->evr); if (rd->flags == REL_NAMESPACE && (q = solv->installsuppdepq) != 0) { int i; for (i = 0; i < q->count; i++) if (q->elements[i] == dep || q->elements[i] == rd->name) return 2; } } FOR_PROVIDES(p, pp, dep) if (solv->decisionmap[p] > 0) return 1; return 0; } static int solver_check_installsuppdepq(Solver *solv, Solvable *s) { Id sup, *supp; supp = s->repo->idarraydata + s->supplements; while ((sup = *supp++) != 0) if (solver_check_installsuppdepq_dep(solv, sup) == 2) return 1; return 0; } static Id autouninstall(Solver *solv, Id *problem) { Pool *pool = solv->pool; int i; int lastfeature = 0, lastupdate = 0; Id v; Id extraflags = -1; for (i = 0; (v = problem[i]) != 0; i++) { if (v < 0) extraflags &= solv->job.elements[-v - 1]; if (v >= solv->featurerules && v < solv->featurerules_end) if (v > lastfeature) lastfeature = v; if (v >= solv->updaterules && v < solv->updaterules_end) { /* check if identical to feature rule */ Id p = solv->rules[v].p; Rule *r; if (p <= 0) continue; r = solv->rules + solv->featurerules + (p - solv->installed->start); if (!r->p) { /* update rule == feature rule */ if (v > lastfeature) lastfeature = v; continue; } if (v > lastupdate) lastupdate = v; } } if (!lastupdate && !lastfeature) return 0; v = lastupdate ? lastupdate : lastfeature; POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "allowuninstall disabling "); solver_printruleclass(solv, SOLV_DEBUG_UNSOLVABLE, solv->rules + v); solver_disableproblem(solv, v); if (extraflags != -1 && (extraflags & SOLVER_CLEANDEPS) != 0 && solv->cleandepsmap.size) { /* add the package to the updatepkgs list, this will automatically turn * on cleandeps mode */ Id p = solv->rules[v].p; if (!solv->cleandeps_updatepkgs) { solv->cleandeps_updatepkgs = solv_calloc(1, sizeof(Queue)); queue_init(solv->cleandeps_updatepkgs); } if (p > 0) { int oldupdatepkgscnt = solv->cleandeps_updatepkgs->count; queue_pushunique(solv->cleandeps_updatepkgs, p); if (solv->cleandeps_updatepkgs->count != oldupdatepkgscnt) solver_disablepolicyrules(solv); } } return v; } /************************************************************************/ /* * enable/disable learnt rules * * we have enabled or disabled some of our rules. We now reenable all * of our learnt rules except the ones that were learnt from rules that * are now disabled. */ static void enabledisablelearntrules(Solver *solv) { Pool *pool = solv->pool; Rule *r; Id why, *whyp; int i; POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "enabledisablelearntrules called\n"); for (i = solv->learntrules, r = solv->rules + i; i < solv->nrules; i++, r++) { whyp = solv->learnt_pool.elements + solv->learnt_why.elements[i - solv->learntrules]; while ((why = *whyp++) != 0) { assert(why > 0 && why < i); if (solv->rules[why].d < 0) break; } /* why != 0: we found a disabled rule, disable the learnt rule */ if (why && r->d >= 0) { IF_POOLDEBUG (SOLV_DEBUG_SOLUTIONS) { POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "disabling "); solver_printruleclass(solv, SOLV_DEBUG_SOLUTIONS, r); } solver_disablerule(solv, r); } else if (!why && r->d < 0) { IF_POOLDEBUG (SOLV_DEBUG_SOLUTIONS) { POOL_DEBUG(SOLV_DEBUG_SOLUTIONS, "re-enabling "); solver_printruleclass(solv, SOLV_DEBUG_SOLUTIONS, r); } solver_enablerule(solv, r); } } } /* * make assertion rules into decisions * * Go through rules and add direct assertions to the decisionqueue. * If we find a conflict, disable rules and add them to problem queue. */ static void makeruledecisions(Solver *solv) { Pool *pool = solv->pool; int i, ri, ii; Rule *r, *rr; Id v, vv; int decisionstart; int record_proof = 1; int oldproblemcount; int havedisabled = 0; /* The system solvable is always installed first */ assert(solv->decisionq.count == 0); queue_push(&solv->decisionq, SYSTEMSOLVABLE); queue_push(&solv->decisionq_why, 0); solv->decisionmap[SYSTEMSOLVABLE] = 1; /* installed at level '1' */ decisionstart = solv->decisionq.count; for (;;) { /* if we needed to re-run, back up decisions to decisionstart */ while (solv->decisionq.count > decisionstart) { v = solv->decisionq.elements[--solv->decisionq.count]; --solv->decisionq_why.count; vv = v > 0 ? v : -v; solv->decisionmap[vv] = 0; } /* note that the ruleassertions queue is ordered */ for (ii = 0; ii < solv->ruleassertions.count; ii++) { ri = solv->ruleassertions.elements[ii]; r = solv->rules + ri; if (havedisabled && ri >= solv->learntrules) { /* just started with learnt rule assertions. If we have disabled * some rules, adapt the learnt rule status */ enabledisablelearntrules(solv); havedisabled = 0; } if (r->d < 0 || !r->p || r->w2) /* disabled, dummy or no assertion */ continue; /* do weak rules in phase 2 */ if (ri < solv->learntrules && MAPTST(&solv->weakrulemap, ri)) continue; v = r->p; vv = v > 0 ? v : -v; if (!solv->decisionmap[vv]) /* if not yet decided */ { queue_push(&solv->decisionq, v); queue_push(&solv->decisionq_why, r - solv->rules); solv->decisionmap[vv] = v > 0 ? 1 : -1; IF_POOLDEBUG (SOLV_DEBUG_PROPAGATE) { Solvable *s = solv->pool->solvables + vv; if (v < 0) POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "conflicting %s (assertion)\n", pool_solvable2str(solv->pool, s)); else POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "installing %s (assertion)\n", pool_solvable2str(solv->pool, s)); } continue; } /* check against previous decision: is there a conflict? */ if (v > 0 && solv->decisionmap[vv] > 0) /* ok to install */ continue; if (v < 0 && solv->decisionmap[vv] < 0) /* ok to remove */ continue; /* * found a conflict! * * The rule (r) we're currently processing says something * different (v = r->p) than a previous decision (decisionmap[abs(v)]) * on this literal */ if (ri >= solv->learntrules) { /* conflict with a learnt rule */ /* can happen when packages cannot be installed for multiple reasons. */ /* we disable the learnt rule in this case */ /* (XXX: we should really call analyze_unsolvable_rule here!) */ solver_disablerule(solv, r); continue; } /* * find the decision which is the "opposite" of the rule */ for (i = 0; i < solv->decisionq.count; i++) if (solv->decisionq.elements[i] == -v) break; assert(i < solv->decisionq.count); /* assert that we found it */ oldproblemcount = solv->problems.count; /* * conflict with system solvable ? */ if (v == -SYSTEMSOLVABLE) { if (record_proof) { queue_push(&solv->problems, solv->learnt_pool.count); queue_push(&solv->learnt_pool, ri); queue_push(&solv->learnt_pool, 0); } else queue_push(&solv->problems, 0); POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "conflict with system solvable, disabling rule #%d\n", ri); if (ri >= solv->jobrules && ri < solv->jobrules_end) v = -(solv->ruletojob.elements[ri - solv->jobrules] + 1); else v = ri; queue_push(&solv->problems, v); queue_push(&solv->problems, 0); if (solv->allowuninstall && v >= solv->featurerules && v < solv->updaterules_end) solv->problems.count = oldproblemcount; solver_disableproblem(solv, v); havedisabled = 1; break; /* start over */ } assert(solv->decisionq_why.elements[i] > 0); /* * conflict with an rpm rule ? */ if (solv->decisionq_why.elements[i] < solv->rpmrules_end) { if (record_proof) { queue_push(&solv->problems, solv->learnt_pool.count); queue_push(&solv->learnt_pool, ri); queue_push(&solv->learnt_pool, solv->decisionq_why.elements[i]); queue_push(&solv->learnt_pool, 0); } else queue_push(&solv->problems, 0); assert(v > 0 || v == -SYSTEMSOLVABLE); POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "conflict with rpm rule, disabling rule #%d\n", ri); if (ri >= solv->jobrules && ri < solv->jobrules_end) v = -(solv->ruletojob.elements[ri - solv->jobrules] + 1); else v = ri; queue_push(&solv->problems, v); queue_push(&solv->problems, 0); if (solv->allowuninstall && v >= solv->featurerules && v < solv->updaterules_end) solv->problems.count = oldproblemcount; solver_disableproblem(solv, v); havedisabled = 1; break; /* start over */ } /* * conflict with another job or update/feature rule */ /* record proof */ if (record_proof) { queue_push(&solv->problems, solv->learnt_pool.count); queue_push(&solv->learnt_pool, ri); queue_push(&solv->learnt_pool, solv->decisionq_why.elements[i]); queue_push(&solv->learnt_pool, 0); } else queue_push(&solv->problems, 0); POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "conflicting update/job assertions over literal %d\n", vv); /* * push all of our rules (can only be feature or job rules) * asserting this literal on the problem stack */ for (i = solv->featurerules, rr = solv->rules + i; i < solv->learntrules; i++, rr++) { if (rr->d < 0 /* disabled */ || rr->w2) /* or no assertion */ continue; if (rr->p != vv /* not affecting the literal */ && rr->p != -vv) continue; if (MAPTST(&solv->weakrulemap, i)) /* weak: silently ignore */ continue; POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, " - disabling rule #%d\n", i); solver_printruleclass(solv, SOLV_DEBUG_UNSOLVABLE, solv->rules + i); v = i; if (i >= solv->jobrules && i < solv->jobrules_end) v = -(solv->ruletojob.elements[i - solv->jobrules] + 1); queue_push(&solv->problems, v); } queue_push(&solv->problems, 0); if (solv->allowuninstall && (v = autouninstall(solv, solv->problems.elements + oldproblemcount + 1)) != 0) solv->problems.count = oldproblemcount; for (i = oldproblemcount + 1; i < solv->problems.count - 1; i++) solver_disableproblem(solv, solv->problems.elements[i]); havedisabled = 1; break; /* start over */ } if (ii < solv->ruleassertions.count) continue; /* * phase 2: now do the weak assertions */ for (ii = 0; ii < solv->ruleassertions.count; ii++) { ri = solv->ruleassertions.elements[ii]; r = solv->rules + ri; if (r->d < 0 || r->w2) /* disabled or no assertion */ continue; if (ri >= solv->learntrules || !MAPTST(&solv->weakrulemap, ri)) /* skip non-weak */ continue; v = r->p; vv = v > 0 ? v : -v; if (!solv->decisionmap[vv]) /* if not yet decided */ { queue_push(&solv->decisionq, v); queue_push(&solv->decisionq_why, r - solv->rules); solv->decisionmap[vv] = v > 0 ? 1 : -1; IF_POOLDEBUG (SOLV_DEBUG_PROPAGATE) { Solvable *s = solv->pool->solvables + vv; if (v < 0) POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "conflicting %s (weak assertion)\n", pool_solvable2str(solv->pool, s)); else POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "installing %s (weak assertion)\n", pool_solvable2str(solv->pool, s)); } continue; } /* check against previous decision: is there a conflict? */ if (v > 0 && solv->decisionmap[vv] > 0) continue; if (v < 0 && solv->decisionmap[vv] < 0) continue; POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "assertion conflict, but I am weak, disabling "); solver_printrule(solv, SOLV_DEBUG_UNSOLVABLE, r); if (ri >= solv->jobrules && ri < solv->jobrules_end) v = -(solv->ruletojob.elements[ri - solv->jobrules] + 1); else v = ri; solver_disableproblem(solv, v); if (v < 0) solver_reenablepolicyrules(solv, -v); havedisabled = 1; break; /* start over */ } if (ii == solv->ruleassertions.count) break; /* finished! */ } } /********************************************************************/ /* watches */ /*------------------------------------------------------------------- * makewatches * * initial setup for all watches */ static void makewatches(Solver *solv) { Rule *r; int i; int nsolvables = solv->pool->nsolvables; solv_free(solv->watches); /* lower half for removals, upper half for installs */ solv->watches = solv_calloc(2 * nsolvables, sizeof(Id)); #if 1 /* do it reverse so rpm rules get triggered first (XXX: obsolete?) */ for (i = 1, r = solv->rules + solv->nrules - 1; i < solv->nrules; i++, r--) #else for (i = 1, r = solv->rules + 1; i < solv->nrules; i++, r++) #endif { if (!r->w2) /* assertions do not need watches */ continue; /* see addwatches_rule(solv, r) */ r->n1 = solv->watches[nsolvables + r->w1]; solv->watches[nsolvables + r->w1] = r - solv->rules; r->n2 = solv->watches[nsolvables + r->w2]; solv->watches[nsolvables + r->w2] = r - solv->rules; } } /*------------------------------------------------------------------- * * add watches (for a new learned rule) * sets up watches for a single rule * * see also makewatches() above. */ static inline void addwatches_rule(Solver *solv, Rule *r) { int nsolvables = solv->pool->nsolvables; r->n1 = solv->watches[nsolvables + r->w1]; solv->watches[nsolvables + r->w1] = r - solv->rules; r->n2 = solv->watches[nsolvables + r->w2]; solv->watches[nsolvables + r->w2] = r - solv->rules; } /********************************************************************/ /* * rule propagation */ /* shortcuts to check if a literal (positive or negative) assignment * evaluates to 'true' or 'false' */ #define DECISIONMAP_TRUE(p) ((p) > 0 ? (decisionmap[p] > 0) : (decisionmap[-p] < 0)) #define DECISIONMAP_FALSE(p) ((p) > 0 ? (decisionmap[p] < 0) : (decisionmap[-p] > 0)) #define DECISIONMAP_UNDEF(p) (decisionmap[(p) > 0 ? (p) : -(p)] == 0) /*------------------------------------------------------------------- * * propagate * * make decision and propagate to all rules * * Evaluate each term affected by the decision (linked through watches). * If we find unit rules we make new decisions based on them. * * return : 0 = everything is OK * rule = conflict found in this rule */ static Rule * propagate(Solver *solv, int level) { Pool *pool = solv->pool; Id *rp, *next_rp; /* rule pointer, next rule pointer in linked list */ Rule *r; /* rule */ Id p, pkg, other_watch; Id *dp; Id *decisionmap = solv->decisionmap; Id *watches = solv->watches + pool->nsolvables; /* place ptr in middle */ POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "----- propagate -----\n"); /* foreach non-propagated decision */ while (solv->propagate_index < solv->decisionq.count) { /* * 'pkg' was just decided * negate because our watches trigger if literal goes FALSE */ pkg = -solv->decisionq.elements[solv->propagate_index++]; IF_POOLDEBUG (SOLV_DEBUG_PROPAGATE) { POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "propagate for decision %d level %d\n", -pkg, level); solver_printruleelement(solv, SOLV_DEBUG_PROPAGATE, 0, -pkg); } /* foreach rule where 'pkg' is now FALSE */ for (rp = watches + pkg; *rp; rp = next_rp) { r = solv->rules + *rp; if (r->d < 0) { /* rule is disabled, goto next */ if (pkg == r->w1) next_rp = &r->n1; else next_rp = &r->n2; continue; } IF_POOLDEBUG (SOLV_DEBUG_PROPAGATE) { POOL_DEBUG(SOLV_DEBUG_PROPAGATE," watch triggered "); solver_printrule(solv, SOLV_DEBUG_PROPAGATE, r); } /* 'pkg' was just decided (was set to FALSE) * * now find other literal watch, check clause * and advance on linked list */ if (pkg == r->w1) { other_watch = r->w2; next_rp = &r->n1; } else { other_watch = r->w1; next_rp = &r->n2; } /* * This term is already true (through the other literal) * so we have nothing to do */ if (DECISIONMAP_TRUE(other_watch)) continue; /* * The other literal is FALSE or UNDEF * */ if (r->d) { /* Not a binary clause, try to move our watch. * * Go over all literals and find one that is * not other_watch * and not FALSE * * (TRUE is also ok, in that case the rule is fulfilled) */ if (r->p /* we have a 'p' */ && r->p != other_watch /* which is not watched */ && !DECISIONMAP_FALSE(r->p)) /* and not FALSE */ { p = r->p; } else /* go find a 'd' to make 'true' */ { /* foreach p in 'd' we just iterate sequentially, doing it in another order just changes the order of decisions, not the decisions itself */ for (dp = pool->whatprovidesdata + r->d; (p = *dp++) != 0;) { if (p != other_watch /* which is not watched */ && !DECISIONMAP_FALSE(p)) /* and not FALSE */ break; } } if (p) { /* * if we found some p that is UNDEF or TRUE, move * watch to it */ IF_POOLDEBUG (SOLV_DEBUG_PROPAGATE) { if (p > 0) POOL_DEBUG(SOLV_DEBUG_PROPAGATE, " -> move w%d to %s\n", (pkg == r->w1 ? 1 : 2), pool_solvid2str(pool, p)); else POOL_DEBUG(SOLV_DEBUG_PROPAGATE," -> move w%d to !%s\n", (pkg == r->w1 ? 1 : 2), pool_solvid2str(pool, -p)); } *rp = *next_rp; next_rp = rp; if (pkg == r->w1) { r->w1 = p; r->n1 = watches[p]; } else { r->w2 = p; r->n2 = watches[p]; } watches[p] = r - solv->rules; continue; } /* search failed, thus all unwatched literals are FALSE */ } /* not binary */ /* * unit clause found, set literal other_watch to TRUE */ if (DECISIONMAP_FALSE(other_watch)) /* check if literal is FALSE */ return r; /* eek, a conflict! */ IF_POOLDEBUG (SOLV_DEBUG_PROPAGATE) { POOL_DEBUG(SOLV_DEBUG_PROPAGATE, " unit "); solver_printrule(solv, SOLV_DEBUG_PROPAGATE, r); } if (other_watch > 0) decisionmap[other_watch] = level; /* install! */ else decisionmap[-other_watch] = -level; /* remove! */ queue_push(&solv->decisionq, other_watch); queue_push(&solv->decisionq_why, r - solv->rules); IF_POOLDEBUG (SOLV_DEBUG_PROPAGATE) { if (other_watch > 0) POOL_DEBUG(SOLV_DEBUG_PROPAGATE, " -> decided to install %s\n", pool_solvid2str(pool, other_watch)); else POOL_DEBUG(SOLV_DEBUG_PROPAGATE, " -> decided to conflict %s\n", pool_solvid2str(pool, -other_watch)); } } /* foreach rule involving 'pkg' */ } /* while we have non-decided decisions */ POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "----- propagate end-----\n"); return 0; /* all is well */ } /********************************************************************/ /* Analysis */ /*------------------------------------------------------------------- * * analyze * and learn */ static int analyze(Solver *solv, int level, Rule *c, int *pr, int *dr, int *whyp) { Pool *pool = solv->pool; Queue r; Id r_buf[4]; int rlevel = 1; Map seen; /* global? */ Id d, v, vv, *dp, why; int l, i, idx; int num = 0, l1num = 0; int learnt_why = solv->learnt_pool.count; Id *decisionmap = solv->decisionmap; queue_init_buffer(&r, r_buf, sizeof(r_buf)/sizeof(*r_buf)); POOL_DEBUG(SOLV_DEBUG_ANALYZE, "ANALYZE at %d ----------------------\n", level); map_init(&seen, pool->nsolvables); idx = solv->decisionq.count; for (;;) { IF_POOLDEBUG (SOLV_DEBUG_ANALYZE) solver_printruleclass(solv, SOLV_DEBUG_ANALYZE, c); queue_push(&solv->learnt_pool, c - solv->rules); d = c->d < 0 ? -c->d - 1 : c->d; dp = d ? pool->whatprovidesdata + d : 0; /* go through all literals of the rule */ for (i = -1; ; i++) { if (i == -1) v = c->p; else if (d == 0) v = i ? 0 : c->w2; else v = *dp++; if (v == 0) break; if (DECISIONMAP_TRUE(v)) /* the one true literal */ continue; vv = v > 0 ? v : -v; if (MAPTST(&seen, vv)) continue; l = solv->decisionmap[vv]; if (l < 0) l = -l; MAPSET(&seen, vv); /* mark that we also need to look at this literal */ if (l == 1) l1num++; /* need to do this one in level1 pass */ else if (l == level) num++; /* need to do this one as well */ else { queue_push(&r, v); /* not level1 or conflict level, add to new rule */ if (l > rlevel) rlevel = l; } } l1retry: if (!num && !--l1num) break; /* all level 1 literals done */ /* find the next literal to investigate */ /* (as num + l1num > 0, we know that we'll always find one) */ for (;;) { assert(idx > 0); v = solv->decisionq.elements[--idx]; vv = v > 0 ? v : -v; if (MAPTST(&seen, vv)) break; } MAPCLR(&seen, vv); if (num && --num == 0) { *pr = -v; /* so that v doesn't get lost */ if (!l1num) break; POOL_DEBUG(SOLV_DEBUG_ANALYZE, "got %d involved level 1 decisions\n", l1num); /* clear non-l1 bits from seen map */ for (i = 0; i < r.count; i++) { v = r.elements[i]; MAPCLR(&seen, v > 0 ? v : -v); } /* only level 1 marks left in seen map */ l1num++; /* as l1retry decrements it */ goto l1retry; } why = solv->decisionq_why.elements[idx]; if (why <= 0) /* just in case, maybe for SYSTEMSOLVABLE */ goto l1retry; c = solv->rules + why; } map_free(&seen); if (r.count == 0) *dr = 0; else if (r.count == 1 && r.elements[0] < 0) *dr = r.elements[0]; else *dr = pool_queuetowhatprovides(pool, &r); IF_POOLDEBUG (SOLV_DEBUG_ANALYZE) { POOL_DEBUG(SOLV_DEBUG_ANALYZE, "learned rule for level %d (am %d)\n", rlevel, level); solver_printruleelement(solv, SOLV_DEBUG_ANALYZE, 0, *pr); for (i = 0; i < r.count; i++) solver_printruleelement(solv, SOLV_DEBUG_ANALYZE, 0, r.elements[i]); } /* push end marker on learnt reasons stack */ queue_push(&solv->learnt_pool, 0); if (whyp) *whyp = learnt_why; queue_free(&r); solv->stats_learned++; return rlevel; } /*------------------------------------------------------------------- * * solver_reset * * reset all solver decisions * called after rules have been enabled/disabled */ void solver_reset(Solver *solv) { Pool *pool = solv->pool; int i; Id v; /* rewind all decisions */ for (i = solv->decisionq.count - 1; i >= 0; i--) { v = solv->decisionq.elements[i]; solv->decisionmap[v > 0 ? v : -v] = 0; } queue_empty(&solv->decisionq_why); queue_empty(&solv->decisionq); solv->recommends_index = -1; solv->propagate_index = 0; queue_empty(&solv->branches); /* adapt learnt rule status to new set of enabled/disabled rules */ enabledisablelearntrules(solv); /* redo all assertion rule decisions */ makeruledecisions(solv); POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "decisions so far: %d\n", solv->decisionq.count); } /*------------------------------------------------------------------- * * analyze_unsolvable_rule * * recursion helper used by analyze_unsolvable */ static void analyze_unsolvable_rule(Solver *solv, Rule *r, Id *lastweakp, Map *rseen) { Pool *pool = solv->pool; int i; Id why = r - solv->rules; IF_POOLDEBUG (SOLV_DEBUG_UNSOLVABLE) solver_printruleclass(solv, SOLV_DEBUG_UNSOLVABLE, r); if (solv->learntrules && why >= solv->learntrules) { if (MAPTST(rseen, why - solv->learntrules)) return; MAPSET(rseen, why - solv->learntrules); for (i = solv->learnt_why.elements[why - solv->learntrules]; solv->learnt_pool.elements[i]; i++) if (solv->learnt_pool.elements[i] > 0) analyze_unsolvable_rule(solv, solv->rules + solv->learnt_pool.elements[i], lastweakp, rseen); return; } if (MAPTST(&solv->weakrulemap, why)) if (!*lastweakp || why > *lastweakp) *lastweakp = why; /* do not add rpm rules to problem */ if (why < solv->rpmrules_end) return; /* turn rule into problem */ if (why >= solv->jobrules && why < solv->jobrules_end) why = -(solv->ruletojob.elements[why - solv->jobrules] + 1); /* normalize dup/infarch rules */ if (why > solv->infarchrules && why < solv->infarchrules_end) { Id name = pool->solvables[-solv->rules[why].p].name; while (why > solv->infarchrules && pool->solvables[-solv->rules[why - 1].p].name == name) why--; } if (why > solv->duprules && why < solv->duprules_end) { Id name = pool->solvables[-solv->rules[why].p].name; while (why > solv->duprules && pool->solvables[-solv->rules[why - 1].p].name == name) why--; } /* return if problem already countains our rule */ if (solv->problems.count) { for (i = solv->problems.count - 1; i >= 0; i--) if (solv->problems.elements[i] == 0) /* end of last problem reached? */ break; else if (solv->problems.elements[i] == why) return; } queue_push(&solv->problems, why); } /*------------------------------------------------------------------- * * analyze_unsolvable * * We know that the problem is not solvable. Record all involved * rules (i.e. the "proof") into solv->learnt_pool. * Record the learnt pool index and all non-rpm rules into * solv->problems. (Our solutions to fix the problems are to * disable those rules.) * * If the proof contains at least one weak rule, we disable the * last of them. * * Otherwise we return 0 if disablerules is not set or disable * _all_ of the problem rules and return 1. * * return: 1 - disabled some rules, try again * 0 - hopeless */ static int analyze_unsolvable(Solver *solv, Rule *cr, int disablerules) { Pool *pool = solv->pool; Rule *r; Map seen; /* global to speed things up? */ Map rseen; Id d, v, vv, *dp, why; int l, i, idx; Id *decisionmap = solv->decisionmap; int oldproblemcount; int oldlearntpoolcount; Id lastweak; int record_proof = 1; POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "ANALYZE UNSOLVABLE ----------------------\n"); solv->stats_unsolvable++; oldproblemcount = solv->problems.count; oldlearntpoolcount = solv->learnt_pool.count; /* make room for proof index */ /* must update it later, as analyze_unsolvable_rule would confuse * it with a rule index if we put the real value in already */ queue_push(&solv->problems, 0); r = cr; map_init(&seen, pool->nsolvables); map_init(&rseen, solv->learntrules ? solv->nrules - solv->learntrules : 0); if (record_proof) queue_push(&solv->learnt_pool, r - solv->rules); lastweak = 0; analyze_unsolvable_rule(solv, r, &lastweak, &rseen); d = r->d < 0 ? -r->d - 1 : r->d; dp = d ? pool->whatprovidesdata + d : 0; for (i = -1; ; i++) { if (i == -1) v = r->p; else if (d == 0) v = i ? 0 : r->w2; else v = *dp++; if (v == 0) break; if (DECISIONMAP_TRUE(v)) /* the one true literal */ continue; vv = v > 0 ? v : -v; l = solv->decisionmap[vv]; if (l < 0) l = -l; MAPSET(&seen, vv); } idx = solv->decisionq.count; while (idx > 0) { v = solv->decisionq.elements[--idx]; vv = v > 0 ? v : -v; if (!MAPTST(&seen, vv)) continue; why = solv->decisionq_why.elements[idx]; assert(why > 0); if (record_proof) queue_push(&solv->learnt_pool, why); r = solv->rules + why; analyze_unsolvable_rule(solv, r, &lastweak, &rseen); d = r->d < 0 ? -r->d - 1 : r->d; dp = d ? pool->whatprovidesdata + d : 0; for (i = -1; ; i++) { if (i == -1) v = r->p; else if (d == 0) v = i ? 0 : r->w2; else v = *dp++; if (v == 0) break; if (DECISIONMAP_TRUE(v)) /* the one true literal */ continue; vv = v > 0 ? v : -v; l = solv->decisionmap[vv]; if (l < 0) l = -l; MAPSET(&seen, vv); } } map_free(&seen); map_free(&rseen); queue_push(&solv->problems, 0); /* mark end of this problem */ if (lastweak) { /* disable last weak rule */ solv->problems.count = oldproblemcount; solv->learnt_pool.count = oldlearntpoolcount; if (lastweak >= solv->jobrules && lastweak < solv->jobrules_end) v = -(solv->ruletojob.elements[lastweak - solv->jobrules] + 1); else v = lastweak; POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "disabling "); solver_printruleclass(solv, SOLV_DEBUG_UNSOLVABLE, solv->rules + lastweak); if (lastweak >= solv->choicerules && lastweak < solv->choicerules_end) solver_disablechoicerules(solv, solv->rules + lastweak); solver_disableproblem(solv, v); if (v < 0) solver_reenablepolicyrules(solv, -v); solver_reset(solv); return 1; } if (solv->allowuninstall && (v = autouninstall(solv, solv->problems.elements + oldproblemcount + 1)) != 0) { solv->problems.count = oldproblemcount; solv->learnt_pool.count = oldlearntpoolcount; solver_reset(solv); return 1; } /* finish proof */ if (record_proof) { queue_push(&solv->learnt_pool, 0); solv->problems.elements[oldproblemcount] = oldlearntpoolcount; } /* + 2: index + trailing zero */ if (disablerules && oldproblemcount + 2 < solv->problems.count) { for (i = oldproblemcount + 1; i < solv->problems.count - 1; i++) solver_disableproblem(solv, solv->problems.elements[i]); /* XXX: might want to enable all weak rules again */ solver_reset(solv); return 1; } POOL_DEBUG(SOLV_DEBUG_UNSOLVABLE, "UNSOLVABLE\n"); return 0; } /********************************************************************/ /* Decision revert */ /*------------------------------------------------------------------- * * revert * revert decisionq to a level */ static void revert(Solver *solv, int level) { Pool *pool = solv->pool; Id v, vv; while (solv->decisionq.count) { v = solv->decisionq.elements[solv->decisionq.count - 1]; vv = v > 0 ? v : -v; if (solv->decisionmap[vv] <= level && solv->decisionmap[vv] >= -level) break; POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "reverting decision %d at %d\n", v, solv->decisionmap[vv]); solv->decisionmap[vv] = 0; solv->decisionq.count--; solv->decisionq_why.count--; solv->propagate_index = solv->decisionq.count; } while (solv->branches.count && solv->branches.elements[solv->branches.count - 1] <= -level) { solv->branches.count--; while (solv->branches.count && solv->branches.elements[solv->branches.count - 1] >= 0) solv->branches.count--; } solv->recommends_index = -1; } /*------------------------------------------------------------------- * * watch2onhighest - put watch2 on literal with highest level */ static inline void watch2onhighest(Solver *solv, Rule *r) { int l, wl = 0; Id d, v, *dp; d = r->d < 0 ? -r->d - 1 : r->d; if (!d) return; /* binary rule, both watches are set */ dp = solv->pool->whatprovidesdata + d; while ((v = *dp++) != 0) { l = solv->decisionmap[v < 0 ? -v : v]; if (l < 0) l = -l; if (l > wl) { r->w2 = dp[-1]; wl = l; } } } /*------------------------------------------------------------------- * * setpropagatelearn * * add free decision (solvable to install) to decisionq * increase level and propagate decision * return if no conflict. * * in conflict case, analyze conflict rule, add resulting * rule to learnt rule set, make decision from learnt * rule (always unit) and re-propagate. * * returns the new solver level or 0 if unsolvable * */ static int setpropagatelearn(Solver *solv, int level, Id decision, int disablerules, Id ruleid) { Pool *pool = solv->pool; Rule *r; Id p = 0, d = 0; int l, why; assert(ruleid >= 0); if (decision) { level++; if (decision > 0) solv->decisionmap[decision] = level; else solv->decisionmap[-decision] = -level; queue_push(&solv->decisionq, decision); queue_push(&solv->decisionq_why, -ruleid); /* <= 0 -> free decision */ } for (;;) { r = propagate(solv, level); if (!r) break; if (level == 1) return analyze_unsolvable(solv, r, disablerules); POOL_DEBUG(SOLV_DEBUG_ANALYZE, "conflict with rule #%d\n", (int)(r - solv->rules)); l = analyze(solv, level, r, &p, &d, &why); /* learnt rule in p and d */ assert(l > 0 && l < level); POOL_DEBUG(SOLV_DEBUG_ANALYZE, "reverting decisions (level %d -> %d)\n", level, l); level = l; revert(solv, level); r = solver_addrule(solv, p, d); assert(r); assert(solv->learnt_why.count == (r - solv->rules) - solv->learntrules); queue_push(&solv->learnt_why, why); if (d) { /* at least 2 literals, needs watches */ watch2onhighest(solv, r); addwatches_rule(solv, r); } else { /* learnt rule is an assertion */ queue_push(&solv->ruleassertions, r - solv->rules); } /* the new rule is unit by design */ solv->decisionmap[p > 0 ? p : -p] = p > 0 ? level : -level; queue_push(&solv->decisionq, p); queue_push(&solv->decisionq_why, r - solv->rules); IF_POOLDEBUG (SOLV_DEBUG_ANALYZE) { POOL_DEBUG(SOLV_DEBUG_ANALYZE, "decision: "); solver_printruleelement(solv, SOLV_DEBUG_ANALYZE, 0, p); POOL_DEBUG(SOLV_DEBUG_ANALYZE, "new rule: "); solver_printrule(solv, SOLV_DEBUG_ANALYZE, r); } } return level; } /*------------------------------------------------------------------- * * select and install * * install best package from the queue. We add an extra package, inst, if * provided. See comment in weak install section. * * returns the new solver level or 0 if unsolvable * */ static int selectandinstall(Solver *solv, int level, Queue *dq, int disablerules, Id ruleid) { Pool *pool = solv->pool; Id p; int i; if (dq->count > 1) policy_filter_unwanted(solv, dq, POLICY_MODE_CHOOSE); if (dq->count > 1) { /* XXX: didn't we already do that? */ /* XXX: shouldn't we prefer installed packages? */ /* XXX: move to policy.c? */ /* choose the supplemented one */ for (i = 0; i < dq->count; i++) if (solver_is_supplementing(solv, pool->solvables + dq->elements[i])) { dq->elements[0] = dq->elements[i]; dq->count = 1; break; } } if (dq->count > 1) { /* multiple candidates, open a branch */ for (i = 1; i < dq->count; i++) queue_push(&solv->branches, dq->elements[i]); queue_push(&solv->branches, -level); } p = dq->elements[0]; POOL_DEBUG(SOLV_DEBUG_POLICY, "installing %s\n", pool_solvid2str(pool, p)); return setpropagatelearn(solv, level, p, disablerules, ruleid); } /********************************************************************/ /* Main solver interface */ /*------------------------------------------------------------------- * * solver_create * create solver structure * * pool: all available solvables * installed: installed Solvables * * * Upon solving, rules are created to flag the Solvables * of the 'installed' Repo as installed. */ Solver * solver_create(Pool *pool) { Solver *solv; solv = (Solver *)solv_calloc(1, sizeof(Solver)); solv->pool = pool; solv->installed = pool->installed; solv->allownamechange = 1; solv->dup_allowdowngrade = 1; solv->dup_allownamechange = 1; solv->dup_allowarchchange = 1; solv->dup_allowvendorchange = 1; solv->keepexplicitobsoletes = pool->noobsoletesmultiversion ? 0 : 1; queue_init(&solv->ruletojob); queue_init(&solv->decisionq); queue_init(&solv->decisionq_why); queue_init(&solv->problems); queue_init(&solv->orphaned); queue_init(&solv->learnt_why); queue_init(&solv->learnt_pool); queue_init(&solv->branches); queue_init(&solv->weakruleq); queue_init(&solv->ruleassertions); queue_init(&solv->addedmap_deduceq); queue_push(&solv->learnt_pool, 0); /* so that 0 does not describe a proof */ map_init(&solv->recommendsmap, pool->nsolvables); map_init(&solv->suggestsmap, pool->nsolvables); map_init(&solv->noupdate, solv->installed ? solv->installed->end - solv->installed->start : 0); solv->recommends_index = 0; solv->decisionmap = (Id *)solv_calloc(pool->nsolvables, sizeof(Id)); solv->nrules = 1; solv->rules = solv_extend_resize(solv->rules, solv->nrules, sizeof(Rule), RULES_BLOCK); memset(solv->rules, 0, sizeof(Rule)); return solv; } /*------------------------------------------------------------------- * * solver_free */ void solver_free(Solver *solv) { queue_free(&solv->job); queue_free(&solv->ruletojob); queue_free(&solv->decisionq); queue_free(&solv->decisionq_why); queue_free(&solv->learnt_why); queue_free(&solv->learnt_pool); queue_free(&solv->problems); queue_free(&solv->solutions); queue_free(&solv->orphaned); queue_free(&solv->branches); queue_free(&solv->weakruleq); queue_free(&solv->ruleassertions); queue_free(&solv->addedmap_deduceq); if (solv->cleandeps_updatepkgs) { queue_free(solv->cleandeps_updatepkgs); solv->cleandeps_updatepkgs = solv_free(solv->cleandeps_updatepkgs); } if (solv->cleandeps_mistakes) { queue_free(solv->cleandeps_mistakes); solv->cleandeps_mistakes = solv_free(solv->cleandeps_mistakes); } if (solv->update_targets) { queue_free(solv->update_targets); solv->update_targets = solv_free(solv->update_targets); } if (solv->installsuppdepq) { queue_free(solv->installsuppdepq); solv->installsuppdepq = solv_free(solv->installsuppdepq); } map_free(&solv->recommendsmap); map_free(&solv->suggestsmap); map_free(&solv->noupdate); map_free(&solv->weakrulemap); map_free(&solv->multiversion); map_free(&solv->updatemap); map_free(&solv->bestupdatemap); map_free(&solv->fixmap); map_free(&solv->dupmap); map_free(&solv->dupinvolvedmap); map_free(&solv->droporphanedmap); map_free(&solv->cleandepsmap); solv_free(solv->decisionmap); solv_free(solv->rules); solv_free(solv->watches); solv_free(solv->obsoletes); solv_free(solv->obsoletes_data); solv_free(solv->multiversionupdaters); solv_free(solv->choicerules_ref); solv_free(solv->bestrules_pkg); solv_free(solv); } int solver_get_flag(Solver *solv, int flag) { switch (flag) { case SOLVER_FLAG_ALLOW_DOWNGRADE: return solv->allowdowngrade; case SOLVER_FLAG_ALLOW_NAMECHANGE: return solv->allownamechange; case SOLVER_FLAG_ALLOW_ARCHCHANGE: return solv->allowarchchange; case SOLVER_FLAG_ALLOW_VENDORCHANGE: return solv->allowvendorchange; case SOLVER_FLAG_ALLOW_UNINSTALL: return solv->allowuninstall; case SOLVER_FLAG_NO_UPDATEPROVIDE: return solv->noupdateprovide; case SOLVER_FLAG_SPLITPROVIDES: return solv->dosplitprovides; case SOLVER_FLAG_IGNORE_RECOMMENDED: return solv->dontinstallrecommended; case SOLVER_FLAG_ADD_ALREADY_RECOMMENDED: return solv->addalreadyrecommended; case SOLVER_FLAG_NO_INFARCHCHECK: return solv->noinfarchcheck; case SOLVER_FLAG_KEEP_EXPLICIT_OBSOLETES: return solv->keepexplicitobsoletes; case SOLVER_FLAG_BEST_OBEY_POLICY: return solv->bestobeypolicy; case SOLVER_FLAG_NO_AUTOTARGET: return solv->noautotarget; default: break; } return -1; } int solver_set_flag(Solver *solv, int flag, int value) { int old = solver_get_flag(solv, flag); switch (flag) { case SOLVER_FLAG_ALLOW_DOWNGRADE: solv->allowdowngrade = value; break; case SOLVER_FLAG_ALLOW_NAMECHANGE: solv->allownamechange = value; break; case SOLVER_FLAG_ALLOW_ARCHCHANGE: solv->allowarchchange = value; break; case SOLVER_FLAG_ALLOW_VENDORCHANGE: solv->allowvendorchange = value; break; case SOLVER_FLAG_ALLOW_UNINSTALL: solv->allowuninstall = value; break; case SOLVER_FLAG_NO_UPDATEPROVIDE: solv->noupdateprovide = value; break; case SOLVER_FLAG_SPLITPROVIDES: solv->dosplitprovides = value; break; case SOLVER_FLAG_IGNORE_RECOMMENDED: solv->dontinstallrecommended = value; break; case SOLVER_FLAG_ADD_ALREADY_RECOMMENDED: solv->addalreadyrecommended = value; break; case SOLVER_FLAG_NO_INFARCHCHECK: solv->noinfarchcheck = value; break; case SOLVER_FLAG_KEEP_EXPLICIT_OBSOLETES: solv->keepexplicitobsoletes = value; break; case SOLVER_FLAG_BEST_OBEY_POLICY: solv->bestobeypolicy = value; break; case SOLVER_FLAG_NO_AUTOTARGET: solv->noautotarget = value; break; default: break; } return old; } int cleandeps_check_mistakes(Solver *solv, int level) { Pool *pool = solv->pool; Rule *r; Id p, pp; int i; int mademistake = 0; if (!solv->cleandepsmap.size) return 0; /* check for mistakes */ for (i = solv->installed->start; i < solv->installed->end; i++) { if (!MAPTST(&solv->cleandepsmap, i - solv->installed->start)) continue; r = solv->rules + solv->featurerules + (i - solv->installed->start); /* a mistake is when the featurerule is true but the updaterule is false */ if (!r->p) continue; FOR_RULELITERALS(p, pp, r) if (p > 0 && solv->decisionmap[p] > 0) break; if (!p) continue; /* feature rule is not true */ r = solv->rules + solv->updaterules + (i - solv->installed->start); if (!r->p) continue; FOR_RULELITERALS(p, pp, r) if (p > 0 && solv->decisionmap[p] > 0) break; if (p) continue; /* update rule is true */ POOL_DEBUG(SOLV_DEBUG_SOLVER, "cleandeps mistake: "); solver_printruleclass(solv, SOLV_DEBUG_SOLVER, r); POOL_DEBUG(SOLV_DEBUG_SOLVER, "feature rule: "); solver_printruleclass(solv, SOLV_DEBUG_SOLVER, solv->rules + solv->featurerules + (i - solv->installed->start)); if (!solv->cleandeps_mistakes) { solv->cleandeps_mistakes = solv_calloc(1, sizeof(Queue)); queue_init(solv->cleandeps_mistakes); } queue_push(solv->cleandeps_mistakes, i); MAPCLR(&solv->cleandepsmap, i - solv->installed->start); solver_reenablepolicyrules_cleandeps(solv, i); mademistake = 1; } if (mademistake) solver_reset(solv); return mademistake; } static void prune_to_update_targets(Solver *solv, Id *cp, Queue *q) { int i, j; Id p, *cp2; for (i = j = 0; i < q->count; i++) { p = q->elements[i]; for (cp2 = cp; *cp2; cp2++) if (*cp2 == p) { q->elements[j++] = p; break; } } queue_truncate(q, j); } /*------------------------------------------------------------------- * * solver_run_sat * * all rules have been set up, now actually run the solver * */ void solver_run_sat(Solver *solv, int disablerules, int doweak) { Queue dq; /* local decisionqueue */ Queue dqs; /* local decisionqueue for supplements */ int systemlevel; int level, olevel; Rule *r; int i, j, n; Solvable *s; Pool *pool = solv->pool; Id p, pp, *dp; int minimizationsteps; int installedpos = solv->installed ? solv->installed->start : 0; IF_POOLDEBUG (SOLV_DEBUG_RULE_CREATION) { POOL_DEBUG (SOLV_DEBUG_RULE_CREATION, "number of rules: %d\n", solv->nrules); for (i = 1; i < solv->nrules; i++) solver_printruleclass(solv, SOLV_DEBUG_RULE_CREATION, solv->rules + i); } POOL_DEBUG(SOLV_DEBUG_SOLVER, "initial decisions: %d\n", solv->decisionq.count); /* start SAT algorithm */ level = 1; systemlevel = level + 1; POOL_DEBUG(SOLV_DEBUG_SOLVER, "solving...\n"); queue_init(&dq); queue_init(&dqs); /* * here's the main loop: * 1) propagate new decisions (only needed once) * 2) fulfill jobs * 3) try to keep installed packages * 4) fulfill all unresolved rules * 5) install recommended packages * 6) minimalize solution if we had choices * if we encounter a problem, we rewind to a safe level and restart * with step 1 */ minimizationsteps = 0; for (;;) { /* * initial propagation of the assertions */ if (level == 1) { POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "propagating (propagate_index: %d; size decisionq: %d)...\n", solv->propagate_index, solv->decisionq.count); if ((r = propagate(solv, level)) != 0) { if (analyze_unsolvable(solv, r, disablerules)) continue; level = 0; break; /* unsolvable */ } } /* * resolve jobs first */ if (level < systemlevel) { POOL_DEBUG(SOLV_DEBUG_SOLVER, "resolving job rules\n"); for (i = solv->jobrules, r = solv->rules + i; i < solv->jobrules_end; i++, r++) { Id l; if (r->d < 0) /* ignore disabled rules */ continue; queue_empty(&dq); FOR_RULELITERALS(l, pp, r) { if (l < 0) { if (solv->decisionmap[-l] <= 0) break; } else { if (solv->decisionmap[l] > 0) break; if (solv->decisionmap[l] == 0) queue_push(&dq, l); } } if (l || !dq.count) continue; /* prune to installed if not updating */ if (dq.count > 1 && solv->installed && !solv->updatemap_all && !(solv->job.elements[solv->ruletojob.elements[i - solv->jobrules]] & SOLVER_ORUPDATE)) { int j, k; for (j = k = 0; j < dq.count; j++) { Solvable *s = pool->solvables + dq.elements[j]; if (s->repo == solv->installed) { dq.elements[k++] = dq.elements[j]; if (solv->updatemap.size && MAPTST(&solv->updatemap, dq.elements[j] - solv->installed->start)) { k = 0; /* package wants to be updated, do not prune */ break; } } } if (k) dq.count = k; } olevel = level; level = selectandinstall(solv, level, &dq, disablerules, i); if (level == 0) break; if (level <= olevel) break; } if (level == 0) break; /* unsolvable */ systemlevel = level + 1; if (i < solv->jobrules_end) continue; solv->decisioncnt_update = solv->decisionq.count; solv->decisioncnt_keep = solv->decisionq.count; } /* * installed packages */ if (level < systemlevel && solv->installed && solv->installed->nsolvables && !solv->installed->disabled) { Repo *installed = solv->installed; int pass; POOL_DEBUG(SOLV_DEBUG_SOLVER, "resolving installed packages\n"); /* we use two passes if we need to update packages * to create a better user experience */ for (pass = solv->updatemap.size ? 0 : 1; pass < 2; pass++) { int passlevel = level; Id *multiversionupdaters = solv->multiversion.size ? solv->multiversionupdaters : 0; if (pass == 1) solv->decisioncnt_keep = solv->decisionq.count; /* start with installedpos, the position that gave us problems the last time */ for (i = installedpos, n = installed->start; n < installed->end; i++, n++) { Rule *rr; Id d; if (i == installed->end) i = installed->start; s = pool->solvables + i; if (s->repo != installed) continue; if (solv->decisionmap[i] > 0 && (!multiversionupdaters || !multiversionupdaters[i - installed->start])) continue; /* already decided */ if (!pass && solv->updatemap.size && !MAPTST(&solv->updatemap, i - installed->start)) continue; /* updates first */ r = solv->rules + solv->updaterules + (i - installed->start); rr = r; if (!rr->p || rr->d < 0) /* disabled -> look at feature rule */ rr -= solv->installed->end - solv->installed->start; if (!rr->p) /* identical to update rule? */ rr = r; if (!rr->p) continue; /* orpaned package */ /* check if we should update this package to the latest version * noupdate is set for erase jobs, in that case we want to deinstall * the installed package and not replace it with a newer version */ queue_empty(&dq); 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 != i)) { if (multiversionupdaters && (d = multiversionupdaters[i - installed->start]) != 0) { /* special multiversion handling, make sure best version is chosen */ if (rr->p == i && solv->decisionmap[i] >= 0) queue_push(&dq, i); while ((p = pool->whatprovidesdata[d++]) != 0) if (solv->decisionmap[p] >= 0) queue_push(&dq, p); if (dq.count && solv->update_targets && solv->update_targets->elements[i - installed->start]) prune_to_update_targets(solv, solv->update_targets->elements + solv->update_targets->elements[i - installed->start], &dq); if (dq.count) { policy_filter_unwanted(solv, &dq, POLICY_MODE_CHOOSE); p = dq.elements[0]; if (p != i && solv->decisionmap[p] == 0) { rr = solv->rules + solv->featurerules + (i - solv->installed->start); if (!rr->p) /* update rule == feature rule? */ rr = rr - solv->featurerules + solv->updaterules; dq.count = 1; } else dq.count = 0; } } else { /* update to best package of the update rule */ FOR_RULELITERALS(p, pp, rr) { if (solv->decisionmap[p] > 0) { dq.count = 0; /* already fulfilled */ break; } if (!solv->decisionmap[p]) queue_push(&dq, p); } } } if (dq.count && solv->update_targets && solv->update_targets->elements[i - installed->start]) prune_to_update_targets(solv, solv->update_targets->elements + solv->update_targets->elements[i - installed->start], &dq); /* install best version */ if (dq.count) { olevel = level; level = selectandinstall(solv, level, &dq, disablerules, rr - solv->rules); if (level == 0) { queue_free(&dq); queue_free(&dqs); return; } if (level <= olevel) { if (level == 1 || level < passlevel) break; /* trouble */ if (level < olevel) n = installed->start; /* redo all */ i--; n--; continue; } } /* if still undecided keep package */ if (solv->decisionmap[i] == 0) { olevel = level; if (solv->cleandepsmap.size && MAPTST(&solv->cleandepsmap, i - installed->start)) { #if 0 POOL_DEBUG(SOLV_DEBUG_POLICY, "cleandeps erasing %s\n", pool_solvid2str(pool, i)); level = setpropagatelearn(solv, level, -i, disablerules, 0); #else continue; #endif } else { POOL_DEBUG(SOLV_DEBUG_POLICY, "keeping %s\n", pool_solvid2str(pool, i)); level = setpropagatelearn(solv, level, i, disablerules, r - solv->rules); } if (level == 0) break; if (level <= olevel) { if (level == 1 || level < passlevel) break; /* trouble */ if (level < olevel) n = installed->start; /* redo all */ i--; n--; continue; /* retry with learnt rule */ } } } if (n < installed->end) { installedpos = i; /* retry problem solvable next time */ break; /* ran into trouble */ } installedpos = installed->start; /* reset installedpos */ } if (level == 0) break; /* unsolvable */ systemlevel = level + 1; if (pass < 2) continue; /* had trouble, retry */ } if (level < systemlevel) systemlevel = level; /* * decide */ solv->decisioncnt_resolve = solv->decisionq.count; POOL_DEBUG(SOLV_DEBUG_POLICY, "deciding unresolved rules\n"); for (i = 1, n = 1; n < solv->nrules; i++, n++) { if (i == solv->nrules) i = 1; r = solv->rules + i; if (r->d < 0) /* ignore disabled rules */ continue; queue_empty(&dq); if (r->d == 0) { /* binary or unary rule */ /* need two positive undecided literals */ if (r->p < 0 || r->w2 <= 0) continue; if (solv->decisionmap[r->p] || solv->decisionmap[r->w2]) continue; queue_push(&dq, r->p); queue_push(&dq, r->w2); } else { /* make sure that * all negative literals are installed * no positive literal is installed * i.e. the rule is not fulfilled and we * just need to decide on the positive literals */ if (r->p < 0) { if (solv->decisionmap[-r->p] <= 0) continue; } else { if (solv->decisionmap[r->p] > 0) continue; if (solv->decisionmap[r->p] == 0) queue_push(&dq, r->p); } dp = pool->whatprovidesdata + r->d; while ((p = *dp++) != 0) { if (p < 0) { if (solv->decisionmap[-p] <= 0) break; } else { if (solv->decisionmap[p] > 0) break; if (solv->decisionmap[p] == 0) queue_push(&dq, p); } } if (p) continue; } IF_POOLDEBUG (SOLV_DEBUG_PROPAGATE) { POOL_DEBUG(SOLV_DEBUG_PROPAGATE, "unfulfilled "); solver_printruleclass(solv, SOLV_DEBUG_PROPAGATE, r); } /* dq.count < 2 cannot happen as this means that * the rule is unit */ assert(dq.count > 1); /* prune to cleandeps packages */ if (solv->cleandepsmap.size && solv->installed) { Repo *installed = solv->installed; for (j = 0; j < dq.count; j++) if (pool->solvables[dq.elements[j]].repo == installed && MAPTST(&solv->cleandepsmap, dq.elements[j] - installed->start)) break; if (j < dq.count) { dq.elements[0] = dq.elements[j]; queue_truncate(&dq, 1); } } olevel = level; level = selectandinstall(solv, level, &dq, disablerules, r - solv->rules); if (level == 0) break; /* unsolvable */ if (level < systemlevel || level == 1) break; /* trouble */ /* something changed, so look at all rules again */ n = 0; } if (n != solv->nrules) /* ran into trouble? */ { if (level == 0) break; /* unsolvable */ continue; /* start over */ } /* at this point we have a consistent system. now do the extras... */ /* first decide leftover cleandeps packages */ if (solv->cleandepsmap.size && solv->installed) { for (p = solv->installed->start; p < solv->installed->end; p++) { s = pool->solvables + p; if (s->repo != solv->installed) continue; if (solv->decisionmap[p] == 0 && MAPTST(&solv->cleandepsmap, p - solv->installed->start)) { POOL_DEBUG(SOLV_DEBUG_POLICY, "cleandeps erasing %s\n", pool_solvid2str(pool, p)); olevel = level; level = setpropagatelearn(solv, level, -p, 0, 0); if (level < olevel) break; } } if (p < solv->installed->end) continue; } solv->decisioncnt_weak = solv->decisionq.count; if (doweak) { int qcount; POOL_DEBUG(SOLV_DEBUG_POLICY, "installing recommended packages\n"); queue_empty(&dq); /* recommended packages */ queue_empty(&dqs); /* supplemented packages */ for (i = 1; i < pool->nsolvables; i++) { if (solv->decisionmap[i] < 0) continue; if (solv->decisionmap[i] > 0) { /* installed, check for recommends */ Id *recp, rec, pp, p; s = pool->solvables + i; if (!solv->addalreadyrecommended && s->repo == solv->installed) continue; /* XXX need to special case AND ? */ if (s->recommends) { recp = s->repo->idarraydata + s->recommends; while ((rec = *recp++) != 0) { qcount = dq.count; FOR_PROVIDES(p, pp, rec) { if (solv->decisionmap[p] > 0) { dq.count = qcount; break; } else if (solv->decisionmap[p] == 0) { if (solv->dupmap_all && solv->installed && pool->solvables[p].repo == solv->installed && (solv->droporphanedmap_all || (solv->droporphanedmap.size && MAPTST(&solv->droporphanedmap, p - solv->installed->start)))) continue; queue_pushunique(&dq, p); } } } } } else { s = pool->solvables + i; if (!s->supplements) continue; if (!pool_installable(pool, s)) continue; if (!solver_is_supplementing(solv, s)) continue; if (solv->dupmap_all && solv->installed && s->repo == solv->installed && (solv->droporphanedmap_all || (solv->droporphanedmap.size && MAPTST(&solv->droporphanedmap, i - solv->installed->start)))) continue; queue_push(&dqs, i); } } /* filter out all packages obsoleted by installed packages */ /* this is no longer needed if we have reverse obsoletes */ if ((dqs.count || dq.count) && solv->installed) { Map obsmap; Id obs, *obsp, po, ppo; map_init(&obsmap, pool->nsolvables); for (p = solv->installed->start; p < solv->installed->end; p++) { s = pool->solvables + p; if (s->repo != solv->installed || !s->obsoletes) continue; if (solv->decisionmap[p] <= 0) continue; if (solv->multiversion.size && MAPTST(&solv->multiversion, p)) continue; obsp = s->repo->idarraydata + s->obsoletes; /* foreach obsoletes */ while ((obs = *obsp++) != 0) FOR_PROVIDES(po, ppo, obs) MAPSET(&obsmap, po); } for (i = j = 0; i < dqs.count; i++) if (!MAPTST(&obsmap, dqs.elements[i])) dqs.elements[j++] = dqs.elements[i]; dqs.count = j; for (i = j = 0; i < dq.count; i++) if (!MAPTST(&obsmap, dq.elements[i])) dq.elements[j++] = dq.elements[i]; dq.count = j; map_free(&obsmap); } /* filter out all already supplemented packages if requested */ if (!solv->addalreadyrecommended && dqs.count) { int dosplitprovides_old = solv->dosplitprovides; /* turn off all new packages */ for (i = 0; i < solv->decisionq.count; i++) { p = solv->decisionq.elements[i]; if (p < 0) continue; s = pool->solvables + p; if (s->repo && s->repo != solv->installed) solv->decisionmap[p] = -solv->decisionmap[p]; } solv->dosplitprovides = 0; /* filter out old supplements */ for (i = j = 0; i < dqs.count; i++) { p = dqs.elements[i]; s = pool->solvables + p; if (!s->supplements) continue; if (!solver_is_supplementing(solv, s)) dqs.elements[j++] = p; else if (solv->installsuppdepq && solver_check_installsuppdepq(solv, s)) dqs.elements[j++] = p; } dqs.count = j; /* undo turning off */ for (i = 0; i < solv->decisionq.count; i++) { p = solv->decisionq.elements[i]; if (p < 0) continue; s = pool->solvables + p; if (s->repo && s->repo != solv->installed) solv->decisionmap[p] = -solv->decisionmap[p]; } solv->dosplitprovides = dosplitprovides_old; } /* multiversion doesn't mix well with supplements. * filter supplemented packages where we already decided * to install a different version (see bnc#501088) */ if (dqs.count && solv->multiversion.size) { for (i = j = 0; i < dqs.count; i++) { p = dqs.elements[i]; if (MAPTST(&solv->multiversion, p)) { Id p2, pp2; s = pool->solvables + p; FOR_PROVIDES(p2, pp2, s->name) if (solv->decisionmap[p2] > 0 && pool->solvables[p2].name == s->name) break; if (p2) continue; /* ignore this package */ } dqs.elements[j++] = p; } dqs.count = j; } /* make dq contain both recommended and supplemented pkgs */ if (dqs.count) { for (i = 0; i < dqs.count; i++) queue_pushunique(&dq, dqs.elements[i]); } if (dq.count) { Map dqmap; int decisioncount = solv->decisionq.count; if (dq.count == 1) { /* simple case, just one package. no need to choose to best version */ p = dq.elements[0]; if (dqs.count) POOL_DEBUG(SOLV_DEBUG_POLICY, "installing supplemented %s\n", pool_solvid2str(pool, p)); else POOL_DEBUG(SOLV_DEBUG_POLICY, "installing recommended %s\n", pool_solvid2str(pool, p)); level = setpropagatelearn(solv, level, p, 0, 0); if (level == 0) break; continue; /* back to main loop */ } /* filter packages, this gives us the best versions */ policy_filter_unwanted(solv, &dq, POLICY_MODE_RECOMMEND); /* create map of result */ map_init(&dqmap, pool->nsolvables); for (i = 0; i < dq.count; i++) MAPSET(&dqmap, dq.elements[i]); /* install all supplemented packages */ for (i = 0; i < dqs.count; i++) { p = dqs.elements[i]; if (solv->decisionmap[p] || !MAPTST(&dqmap, p)) continue; POOL_DEBUG(SOLV_DEBUG_POLICY, "installing supplemented %s\n", pool_solvid2str(pool, p)); olevel = level; level = setpropagatelearn(solv, level, p, 0, 0); if (level <= olevel) break; } if (i < dqs.count || solv->decisionq.count < decisioncount) { map_free(&dqmap); if (level == 0) break; continue; } /* install all recommended packages */ /* more work as we want to created branches if multiple * choices are valid */ for (i = 0; i < decisioncount; i++) { Id rec, *recp, pp; p = solv->decisionq.elements[i]; if (p < 0) continue; s = pool->solvables + p; if (!s->repo || (!solv->addalreadyrecommended && s->repo == solv->installed)) continue; if (!s->recommends) continue; recp = s->repo->idarraydata + s->recommends; while ((rec = *recp++) != 0) { queue_empty(&dq); FOR_PROVIDES(p, pp, rec) { if (solv->decisionmap[p] > 0) { dq.count = 0; break; } else if (solv->decisionmap[p] == 0 && MAPTST(&dqmap, p)) queue_pushunique(&dq, p); } if (!dq.count) continue; if (dq.count > 1) { /* multiple candidates, open a branch */ for (i = 1; i < dq.count; i++) queue_push(&solv->branches, dq.elements[i]); queue_push(&solv->branches, -level); } p = dq.elements[0]; POOL_DEBUG(SOLV_DEBUG_POLICY, "installing recommended %s\n", pool_solvid2str(pool, p)); olevel = level; level = setpropagatelearn(solv, level, p, 0, 0); if (level <= olevel || solv->decisionq.count < decisioncount) break; /* we had to revert some decisions */ } if (rec) break; /* had a problem above, quit loop */ } map_free(&dqmap); if (level == 0) break; continue; /* back to main loop so that all deps are checked */ } } solv->decisioncnt_orphan = solv->decisionq.count; if (solv->dupmap_all && solv->installed) { int installedone = 0; /* let's see if we can install some unsupported package */ POOL_DEBUG(SOLV_DEBUG_SOLVER, "deciding orphaned packages\n"); for (i = 0; i < solv->orphaned.count; i++) { p = solv->orphaned.elements[i]; if (solv->decisionmap[p]) continue; /* already decided */ if (solv->droporphanedmap_all) continue; if (solv->droporphanedmap.size && MAPTST(&solv->droporphanedmap, p - solv->installed->start)) continue; POOL_DEBUG(SOLV_DEBUG_SOLVER, "keeping orphaned %s\n", pool_solvid2str(pool, p)); olevel = level; level = setpropagatelearn(solv, level, p, 0, 0); installedone = 1; if (level < olevel) break; } if (installedone || i < solv->orphaned.count) { if (level == 0) break; continue; /* back to main loop */ } for (i = 0; i < solv->orphaned.count; i++) { p = solv->orphaned.elements[i]; if (solv->decisionmap[p]) continue; /* already decided */ POOL_DEBUG(SOLV_DEBUG_SOLVER, "removing orphaned %s\n", pool_solvid2str(pool, p)); olevel = level; level = setpropagatelearn(solv, level, -p, 0, 0); if (level < olevel) break; } if (i < solv->orphaned.count) { if (level == 0) break; continue; /* back to main loop */ } } if (solv->installed && solv->cleandepsmap.size) { if (cleandeps_check_mistakes(solv, level)) { level = 1; /* restart from scratch */ systemlevel = level + 1; continue; } } if (solv->solution_callback) { solv->solution_callback(solv, solv->solution_callback_data); if (solv->branches.count) { int i = solv->branches.count - 1; int l = -solv->branches.elements[i]; Id why; for (; i > 0; i--) if (solv->branches.elements[i - 1] < 0) break; p = solv->branches.elements[i]; POOL_DEBUG(SOLV_DEBUG_SOLVER, "branching with %s\n", pool_solvid2str(pool, p)); queue_empty(&dq); for (j = i + 1; j < solv->branches.count; j++) queue_push(&dq, solv->branches.elements[j]); solv->branches.count = i; level = l; revert(solv, level); if (dq.count > 1) for (j = 0; j < dq.count; j++) queue_push(&solv->branches, dq.elements[j]); olevel = level; why = -solv->decisionq_why.elements[solv->decisionq_why.count]; assert(why >= 0); level = setpropagatelearn(solv, level, p, disablerules, why); if (level == 0) break; continue; } /* all branches done, we're finally finished */ break; } /* auto-minimization step */ if (solv->branches.count) { int l = 0, lasti = -1, lastl = -1; Id why; p = 0; for (i = solv->branches.count - 1; i >= 0; i--) { p = solv->branches.elements[i]; if (p < 0) l = -p; else if (p > 0 && solv->decisionmap[p] > l + 1) { lasti = i; lastl = l; } } if (lasti >= 0) { /* kill old solvable so that we do not loop */ p = solv->branches.elements[lasti]; solv->branches.elements[lasti] = 0; POOL_DEBUG(SOLV_DEBUG_SOLVER, "minimizing %d -> %d with %s\n", solv->decisionmap[p], lastl, pool_solvid2str(pool, p)); minimizationsteps++; level = lastl; revert(solv, level); why = -solv->decisionq_why.elements[solv->decisionq_why.count]; assert(why >= 0); olevel = level; level = setpropagatelearn(solv, level, p, disablerules, why); if (level == 0) break; continue; /* back to main loop */ } } /* no minimization found, we're finally finished! */ break; } POOL_DEBUG(SOLV_DEBUG_STATS, "solver statistics: %d learned rules, %d unsolvable, %d minimization steps\n", solv->stats_learned, solv->stats_unsolvable, minimizationsteps); POOL_DEBUG(SOLV_DEBUG_STATS, "done solving.\n\n"); queue_free(&dq); queue_free(&dqs); if (level == 0) { /* unsolvable */ solv->decisioncnt_update = solv->decisionq.count; solv->decisioncnt_keep = solv->decisionq.count; solv->decisioncnt_resolve = solv->decisionq.count; solv->decisioncnt_weak = solv->decisionq.count; solv->decisioncnt_orphan = solv->decisionq.count; } #if 0 solver_printdecisionq(solv, SOLV_DEBUG_RESULT); #endif } /*------------------------------------------------------------------- * * remove disabled conflicts * * purpose: update the decisionmap after some rules were disabled. * this is used to calculate the suggested/recommended package list. * Also returns a "removed" list to undo the discisionmap changes. */ static void removedisabledconflicts(Solver *solv, Queue *removed) { Pool *pool = solv->pool; int i, n; Id p, why, *dp; Id new; Rule *r; Id *decisionmap = solv->decisionmap; queue_empty(removed); for (i = 0; i < solv->decisionq.count; i++) { p = solv->decisionq.elements[i]; if (p > 0) continue; /* conflicts only, please */ why = solv->decisionq_why.elements[i]; if (why == 0) { /* no rule involved, must be a orphan package drop */ continue; } /* we never do conflicts on free decisions, so there * must have been an unit rule */ assert(why > 0); r = solv->rules + why; if (r->d < 0 && decisionmap[-p]) { /* rule is now disabled, remove from decisionmap */ POOL_DEBUG(SOLV_DEBUG_SOLVER, "removing conflict for package %s[%d]\n", pool_solvid2str(pool, -p), -p); queue_push(removed, -p); queue_push(removed, decisionmap[-p]); decisionmap[-p] = 0; } } if (!removed->count) return; /* we removed some confliced packages. some of them might still * be in conflict, so search for unit rules and re-conflict */ new = 0; for (i = n = 1, r = solv->rules + i; n < solv->nrules; i++, r++, n++) { if (i == solv->nrules) { i = 1; r = solv->rules + i; } if (r->d < 0) continue; if (!r->w2) { if (r->p < 0 && !decisionmap[-r->p]) new = r->p; } else if (!r->d) { /* binary rule */ if (r->p < 0 && decisionmap[-r->p] == 0 && DECISIONMAP_FALSE(r->w2)) new = r->p; else if (r->w2 < 0 && decisionmap[-r->w2] == 0 && DECISIONMAP_FALSE(r->p)) new = r->w2; } else { if (r->p < 0 && decisionmap[-r->p] == 0) new = r->p; if (new || DECISIONMAP_FALSE(r->p)) { dp = pool->whatprovidesdata + r->d; while ((p = *dp++) != 0) { if (new && p == new) continue; if (p < 0 && decisionmap[-p] == 0) { if (new) { new = 0; break; } new = p; } else if (!DECISIONMAP_FALSE(p)) { new = 0; break; } } } } if (new) { POOL_DEBUG(SOLV_DEBUG_SOLVER, "re-conflicting package %s[%d]\n", pool_solvid2str(pool, -new), -new); decisionmap[-new] = -1; new = 0; n = 0; /* redo all rules */ } } } static inline void undo_removedisabledconflicts(Solver *solv, Queue *removed) { int i; for (i = 0; i < removed->count; i += 2) solv->decisionmap[removed->elements[i]] = removed->elements[i + 1]; } /*------------------------------------------------------------------- * * weaken solvable dependencies */ static void weaken_solvable_deps(Solver *solv, Id p) { int i; Rule *r; for (i = 1, r = solv->rules + i; i < solv->rpmrules_end; i++, r++) { if (r->p != -p) continue; if ((r->d == 0 || r->d == -1) && r->w2 < 0) continue; /* conflict */ queue_push(&solv->weakruleq, i); } } /********************************************************************/ /* main() */ void solver_calculate_multiversionmap(Pool *pool, Queue *job, Map *multiversionmap) { int i; Id how, what, select; Id p, pp; for (i = 0; i < job->count; i += 2) { how = job->elements[i]; if ((how & SOLVER_JOBMASK) != SOLVER_MULTIVERSION) continue; what = job->elements[i + 1]; select = how & SOLVER_SELECTMASK; if (!multiversionmap->size) map_grow(multiversionmap, pool->nsolvables); if (select == SOLVER_SOLVABLE_ALL) { FOR_POOL_SOLVABLES(p) MAPSET(multiversionmap, p); } else if (select == SOLVER_SOLVABLE_REPO) { Solvable *s; Repo *repo = pool_id2repo(pool, what); if (repo) FOR_REPO_SOLVABLES(repo, p, s) MAPSET(multiversionmap, p); } FOR_JOB_SELECT(p, pp, select, what) MAPSET(multiversionmap, p); } } void solver_calculate_noobsmap(Pool *pool, Queue *job, Map *multiversionmap) { solver_calculate_multiversionmap(pool, job, multiversionmap); } /* * add a rule created by a job, record job number and weak flag */ static inline void solver_addjobrule(Solver *solv, Id p, Id d, Id job, int weak) { solver_addrule(solv, p, d); queue_push(&solv->ruletojob, job); if (weak) queue_push(&solv->weakruleq, solv->nrules - 1); } static inline void add_cleandeps_package(Solver *solv, Id p) { if (!solv->cleandeps_updatepkgs) { solv->cleandeps_updatepkgs = solv_calloc(1, sizeof(Queue)); queue_init(solv->cleandeps_updatepkgs); } queue_pushunique(solv->cleandeps_updatepkgs, p); } static void add_update_target(Solver *solv, Id p, Id how) { Pool *pool = solv->pool; Solvable *s = pool->solvables + p; Repo *installed = solv->installed; Id pi, pip; if (!solv->update_targets) { solv->update_targets = solv_calloc(1, sizeof(Queue)); queue_init(solv->update_targets); } if (s->repo == installed) { queue_push2(solv->update_targets, p, p); return; } FOR_PROVIDES(pi, pip, s->name) { Solvable *si = pool->solvables + pi; if (si->repo != installed || si->name != s->name) continue; if (how & SOLVER_FORCEBEST) { if (!solv->bestupdatemap.size) map_grow(&solv->bestupdatemap, installed->end - installed->start); MAPSET(&solv->bestupdatemap, pi - installed->start); } if (how & SOLVER_CLEANDEPS) add_cleandeps_package(solv, pi); queue_push2(solv->update_targets, pi, p); /* check if it's ok to keep the installed package */ if (s->evr == si->evr && solvable_identical(s, si)) queue_push2(solv->update_targets, pi, pi); } if (s->obsoletes) { Id obs, *obsp = s->repo->idarraydata + s->obsoletes; while ((obs = *obsp++) != 0) { FOR_PROVIDES(pi, pip, obs) { Solvable *si = pool->solvables + pi; if (si->repo != installed) continue; if (si->name == s->name) continue; /* already handled above */ if (!pool->obsoleteusesprovides && !pool_match_nevr(pool, si, obs)) continue; if (pool->obsoleteusescolors && !pool_colormatch(pool, s, si)) continue; if (how & SOLVER_FORCEBEST) { if (!solv->bestupdatemap.size) map_grow(&solv->bestupdatemap, installed->end - installed->start); MAPSET(&solv->bestupdatemap, pi - installed->start); } if (how & SOLVER_CLEANDEPS) add_cleandeps_package(solv, pi); queue_push2(solv->update_targets, pi, p); } } } } static int transform_update_targets_sortfn(const void *ap, const void *bp, void *dp) { const Id *a = ap; const Id *b = bp; if (a[0] - b[0]) return a[0] - b[0]; return a[1] - b[1]; } static void transform_update_targets(Solver *solv) { Repo *installed = solv->installed; Queue *update_targets = solv->update_targets; int i, j; Id p, q, lastp, lastq; if (!update_targets->count) { queue_free(update_targets); solv->update_targets = solv_free(update_targets); return; } if (update_targets->count > 2) solv_sort(update_targets->elements, update_targets->count >> 1, 2 * sizeof(Id), transform_update_targets_sortfn, solv); queue_insertn(update_targets, 0, installed->end - installed->start, 0); lastp = lastq = 0; for (i = j = installed->end - installed->start; i < update_targets->count; i += 2) { if ((p = update_targets->elements[i]) != lastp) { if (!solv->updatemap.size) map_grow(&solv->updatemap, installed->end - installed->start); MAPSET(&solv->updatemap, p - installed->start); update_targets->elements[j++] = 0; /* finish old set */ update_targets->elements[p - installed->start] = j; /* start new set */ lastp = p; lastq = 0; } if ((q = update_targets->elements[i + 1]) != lastq) { update_targets->elements[j++] = q; lastq = q; } } queue_truncate(update_targets, j); queue_push(update_targets, 0); /* finish last set */ } static void addedmap2deduceq(Solver *solv, Map *addedmap) { Pool *pool = solv->pool; int i, j; Id p; Rule *r; queue_empty(&solv->addedmap_deduceq); for (i = 2, j = solv->rpmrules_end - 1; i < pool->nsolvables && j > 0; j--) { r = solv->rules + j; if (r->p >= 0) continue; if ((r->d == 0 || r->d == -1) && r->w2 < 0) continue; p = -r->p; if (!MAPTST(addedmap, p)) { /* should never happen, but... */ if (!solv->addedmap_deduceq.count || solv->addedmap_deduceq.elements[solv->addedmap_deduceq.count - 1] != -p) queue_push(&solv->addedmap_deduceq, -p); continue; } for (; i < p; i++) if (MAPTST(addedmap, i)) queue_push(&solv->addedmap_deduceq, i); if (i == p) i++; } for (; i < pool->nsolvables; i++) if (MAPTST(addedmap, i)) queue_push(&solv->addedmap_deduceq, i); j = 0; for (i = 2; i < pool->nsolvables; i++) if (MAPTST(addedmap, i)) j++; } static void deduceq2addedmap(Solver *solv, Map *addedmap) { int j; Id p; Rule *r; for (j = solv->rpmrules_end - 1; j > 0; j--) { r = solv->rules + j; if (r->d < 0 && r->p) solver_enablerule(solv, r); if (r->p >= 0) continue; if ((r->d == 0 || r->d == -1) && r->w2 < 0) continue; p = -r->p; MAPSET(addedmap, p); } for (j = 0; j < solv->addedmap_deduceq.count; j++) { p = solv->addedmap_deduceq.elements[j]; if (p > 0) MAPSET(addedmap, p); else MAPCLR(addedmap, p); } } /* * * solve job queue * */ int solver_solve(Solver *solv, Queue *job) { Pool *pool = solv->pool; Repo *installed = solv->installed; int i; int oldnrules, initialnrules; Map addedmap; /* '1' == have rpm-rules for solvable */ Map installcandidatemap; Id how, what, select, name, weak, p, pp, d; Queue q; Solvable *s; Rule *r; int now, solve_start; int hasdupjob = 0; int hasbestinstalljob = 0; solve_start = solv_timems(0); /* log solver options */ POOL_DEBUG(SOLV_DEBUG_STATS, "solver started\n"); POOL_DEBUG(SOLV_DEBUG_STATS, "dosplitprovides=%d, noupdateprovide=%d, noinfarchcheck=%d\n", solv->dosplitprovides, solv->noupdateprovide, solv->noinfarchcheck); 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); POOL_DEBUG(SOLV_DEBUG_STATS, "promoteepoch=%d, forbidselfconflicts=%d\n", pool->promoteepoch, pool->forbidselfconflicts); POOL_DEBUG(SOLV_DEBUG_STATS, "obsoleteusesprovides=%d, implicitobsoleteusesprovides=%d, obsoleteusescolors=%d, implicitobsoleteusescolors=%d\n", pool->obsoleteusesprovides, pool->implicitobsoleteusesprovides, pool->obsoleteusescolors, pool->implicitobsoleteusescolors); POOL_DEBUG(SOLV_DEBUG_STATS, "dontinstallrecommended=%d, addalreadyrecommended=%d\n", solv->dontinstallrecommended, solv->addalreadyrecommended); /* create whatprovides if not already there */ if (!pool->whatprovides) pool_createwhatprovides(pool); /* create obsolete index */ policy_create_obsolete_index(solv); /* remember job */ queue_free(&solv->job); queue_init_clone(&solv->job, job); solv->pooljobcnt = pool->pooljobs.count; if (pool->pooljobs.count) queue_insertn(&solv->job, 0, pool->pooljobs.count, pool->pooljobs.elements); job = &solv->job; /* free old stuff */ if (solv->update_targets) { queue_free(solv->update_targets); solv->update_targets = solv_free(solv->update_targets); } if (solv->cleandeps_updatepkgs) { queue_free(solv->cleandeps_updatepkgs); solv->cleandeps_updatepkgs = solv_free(solv->cleandeps_updatepkgs); } queue_empty(&solv->ruleassertions); solv->bestrules_pkg = solv_free(solv->bestrules_pkg); solv->choicerules_ref = solv_free(solv->choicerules_ref); if (solv->noupdate.size) map_empty(&solv->noupdate); if (solv->multiversion.size) { map_free(&solv->multiversion); map_init(&solv->multiversion, 0); } solv->updatemap_all = 0; if (solv->updatemap.size) { map_free(&solv->updatemap); map_init(&solv->updatemap, 0); } solv->bestupdatemap_all = 0; if (solv->bestupdatemap.size) { map_free(&solv->bestupdatemap); map_init(&solv->bestupdatemap, 0); } solv->fixmap_all = 0; if (solv->fixmap.size) { map_free(&solv->fixmap); map_init(&solv->fixmap, 0); } solv->dupmap_all = 0; if (solv->dupmap.size) { map_free(&solv->dupmap); map_init(&solv->dupmap, 0); } if (solv->dupinvolvedmap.size) { map_free(&solv->dupinvolvedmap); map_init(&solv->dupinvolvedmap, 0); } solv->droporphanedmap_all = 0; if (solv->droporphanedmap.size) { map_free(&solv->droporphanedmap); map_init(&solv->droporphanedmap, 0); } if (solv->cleandepsmap.size) { map_free(&solv->cleandepsmap); map_init(&solv->cleandepsmap, 0); } queue_empty(&solv->weakruleq); solv->watches = solv_free(solv->watches); queue_empty(&solv->ruletojob); if (solv->decisionq.count) memset(solv->decisionmap, 0, pool->nsolvables * sizeof(Id)); queue_empty(&solv->decisionq); queue_empty(&solv->decisionq_why); solv->decisioncnt_update = solv->decisioncnt_keep = solv->decisioncnt_resolve = solv->decisioncnt_weak = solv->decisioncnt_orphan = 0; queue_empty(&solv->learnt_why); queue_empty(&solv->learnt_pool); queue_empty(&solv->branches); solv->propagate_index = 0; queue_empty(&solv->problems); queue_empty(&solv->solutions); queue_empty(&solv->orphaned); solv->stats_learned = solv->stats_unsolvable = 0; if (solv->recommends_index) { map_empty(&solv->recommendsmap); map_empty(&solv->suggestsmap); solv->recommends_index = 0; } solv->multiversionupdaters = solv_free(solv->multiversionupdaters); /* * create basic rule set of all involved packages * use addedmap bitmap to make sure we don't create rules twice */ /* create multiversion map if needed */ solver_calculate_multiversionmap(pool, job, &solv->multiversion); map_init(&addedmap, pool->nsolvables); MAPSET(&addedmap, SYSTEMSOLVABLE); map_init(&installcandidatemap, pool->nsolvables); queue_init(&q); now = solv_timems(0); /* * create rules for all package that could be involved with the solving * so called: rpm rules * */ initialnrules = solv->rpmrules_end ? solv->rpmrules_end : 1; if (initialnrules > 1) deduceq2addedmap(solv, &addedmap); if (solv->nrules != initialnrules) solver_shrinkrules(solv, initialnrules); solv->nrules = initialnrules; solv->rpmrules_end = 0; if (installed) { /* check for update/verify jobs as they need to be known early */ for (i = 0; i < job->count; i += 2) { how = job->elements[i]; what = job->elements[i + 1]; select = how & SOLVER_SELECTMASK; switch (how & SOLVER_JOBMASK) { case SOLVER_VERIFY: if (select == SOLVER_SOLVABLE_ALL || (select == SOLVER_SOLVABLE_REPO && installed && what == installed->repoid)) solv->fixmap_all = 1; FOR_JOB_SELECT(p, pp, select, what) { s = pool->solvables + p; if (s->repo != installed) continue; if (!solv->fixmap.size) map_grow(&solv->fixmap, installed->end - installed->start); MAPSET(&solv->fixmap, p - installed->start); } break; case SOLVER_UPDATE: if (select == SOLVER_SOLVABLE_ALL) { solv->updatemap_all = 1; if (how & SOLVER_FORCEBEST) solv->bestupdatemap_all = 1; if (how & SOLVER_CLEANDEPS) { FOR_REPO_SOLVABLES(installed, p, s) add_cleandeps_package(solv, p); } } else if (select == SOLVER_SOLVABLE_REPO) { Repo *repo = pool_id2repo(pool, what); if (!repo) break; if (repo == installed && !(how & SOLVER_TARGETED)) { solv->updatemap_all = 1; if (how & SOLVER_FORCEBEST) solv->bestupdatemap_all = 1; if (how & SOLVER_CLEANDEPS) { FOR_REPO_SOLVABLES(installed, p, s) add_cleandeps_package(solv, p); } break; } if (solv->noautotarget && !(how & SOLVER_TARGETED)) break; /* targeted update */ FOR_REPO_SOLVABLES(repo, p, s) add_update_target(solv, p, how); } else { if (!(how & SOLVER_TARGETED)) { int targeted = 1; FOR_JOB_SELECT(p, pp, select, what) { s = pool->solvables + p; if (s->repo != installed) continue; if (!solv->updatemap.size) map_grow(&solv->updatemap, installed->end - installed->start); MAPSET(&solv->updatemap, p - installed->start); if (how & SOLVER_FORCEBEST) { if (!solv->bestupdatemap.size) map_grow(&solv->bestupdatemap, installed->end - installed->start); MAPSET(&solv->bestupdatemap, p - installed->start); } if (how & SOLVER_CLEANDEPS) add_cleandeps_package(solv, p); targeted = 0; } if (!targeted || solv->noautotarget) break; } FOR_JOB_SELECT(p, pp, select, what) add_update_target(solv, p, how); } break; default: break; } } if (solv->update_targets) transform_update_targets(solv); oldnrules = solv->nrules; FOR_REPO_SOLVABLES(installed, p, s) solver_addrpmrulesforsolvable(solv, s, &addedmap); POOL_DEBUG(SOLV_DEBUG_STATS, "added %d rpm rules for installed solvables\n", solv->nrules - oldnrules); oldnrules = solv->nrules; FOR_REPO_SOLVABLES(installed, p, s) solver_addrpmrulesforupdaters(solv, s, &addedmap, 1); POOL_DEBUG(SOLV_DEBUG_STATS, "added %d rpm rules for updaters of installed solvables\n", solv->nrules - oldnrules); } /* * create rules for all packages involved in the job * (to be installed or removed) */ oldnrules = solv->nrules; for (i = 0; i < job->count; i += 2) { how = job->elements[i]; what = job->elements[i + 1]; select = how & SOLVER_SELECTMASK; switch (how & SOLVER_JOBMASK) { case SOLVER_INSTALL: FOR_JOB_SELECT(p, pp, select, what) { MAPSET(&installcandidatemap, p); solver_addrpmrulesforsolvable(solv, pool->solvables + p, &addedmap); } break; case SOLVER_DISTUPGRADE: if (select == SOLVER_SOLVABLE_ALL) { solv->dupmap_all = 1; solv->updatemap_all = 1; if (how & SOLVER_FORCEBEST) solv->bestupdatemap_all = 1; } if (!solv->dupmap_all) hasdupjob = 1; break; default: break; } } POOL_DEBUG(SOLV_DEBUG_STATS, "added %d rpm rules for packages involved in a job\n", solv->nrules - oldnrules); /* * add rules for suggests, enhances */ oldnrules = solv->nrules; solver_addrpmrulesforweak(solv, &addedmap); POOL_DEBUG(SOLV_DEBUG_STATS, "added %d rpm rules because of weak dependencies\n", solv->nrules - oldnrules); /* * first pass done, we now have all the rpm rules we need. * unify existing rules before going over all job rules and * policy rules. * at this point the system is always solvable, * as an empty system (remove all packages) is a valid solution */ IF_POOLDEBUG (SOLV_DEBUG_STATS) { int possible = 0, installable = 0; for (i = 1; i < pool->nsolvables; i++) { if (pool_installable(pool, pool->solvables + i)) installable++; if (MAPTST(&addedmap, i)) possible++; } POOL_DEBUG(SOLV_DEBUG_STATS, "%d of %d installable solvables considered for solving\n", possible, installable); } if (solv->nrules > initialnrules) solver_unifyrules(solv); /* remove duplicate rpm rules */ solv->rpmrules_end = solv->nrules; /* mark end of rpm rules */ if (solv->nrules > initialnrules) addedmap2deduceq(solv, &addedmap); /* so that we can recreate the addedmap */ POOL_DEBUG(SOLV_DEBUG_STATS, "rpm rule memory used: %d K\n", solv->nrules * (int)sizeof(Rule) / 1024); POOL_DEBUG(SOLV_DEBUG_STATS, "rpm rule creation took %d ms\n", solv_timems(now)); /* create dup maps if needed. We need the maps early to create our * update rules */ if (hasdupjob) solver_createdupmaps(solv); /* * create feature rules * * foreach installed: * create assertion (keep installed, if no update available) * or * create update rule (A|update1(A)|update2(A)|...) * * those are used later on to keep a version of the installed packages in * best effort mode */ solv->featurerules = solv->nrules; /* mark start of feature rules */ if (installed) { /* foreach possibly installed solvable */ for (i = installed->start, s = pool->solvables + i; i < installed->end; i++, s++) { if (s->repo != installed) { solver_addrule(solv, 0, 0); /* create dummy rule */ continue; } solver_addupdaterule(solv, s, 1); /* allow s to be updated */ } /* make sure we accounted for all rules */ assert(solv->nrules - solv->featurerules == installed->end - installed->start); } solv->featurerules_end = solv->nrules; /* * Add update rules for installed solvables * * almost identical to feature rules * except that downgrades/archchanges/vendorchanges are not allowed */ solv->updaterules = solv->nrules; if (installed) { /* foreach installed solvables */ /* we create all update rules, but disable some later on depending on the job */ for (i = installed->start, s = pool->solvables + i; i < installed->end; i++, s++) { Rule *sr; if (s->repo != installed) { solver_addrule(solv, 0, 0); /* create dummy rule */ continue; } solver_addupdaterule(solv, s, 0); /* allowall = 0: downgrades not allowed */ /* * check for and remove duplicate */ r = solv->rules + solv->nrules - 1; /* r: update rule */ sr = r - (installed->end - installed->start); /* sr: feature rule */ /* it's orphaned if there is no feature rule or the feature rule * consists just of the installed package */ if (!sr->p || (sr->p == i && !sr->d && !sr->w2)) queue_push(&solv->orphaned, i); if (!r->p) { assert(solv->dupmap_all && !sr->p); continue; } if (!solver_rulecmp(solv, r, sr)) memset(sr, 0, sizeof(*sr)); /* delete unneeded feature rule */ else solver_disablerule(solv, sr); /* disable feature rule */ } /* consistency check: we added a rule for _every_ installed solvable */ assert(solv->nrules - solv->updaterules == installed->end - installed->start); } solv->updaterules_end = solv->nrules; /* * now add all job rules */ solv->jobrules = solv->nrules; for (i = 0; i < job->count; i += 2) { oldnrules = solv->nrules; if (i && i == solv->pooljobcnt) POOL_DEBUG(SOLV_DEBUG_JOB, "end of pool jobs\n"); how = job->elements[i]; what = job->elements[i + 1]; weak = how & SOLVER_WEAK; select = how & SOLVER_SELECTMASK; switch (how & SOLVER_JOBMASK) { case SOLVER_INSTALL: POOL_DEBUG(SOLV_DEBUG_JOB, "job: %sinstall %s\n", weak ? "weak " : "", solver_select2str(pool, select, what)); if ((how & SOLVER_CLEANDEPS) != 0 && !solv->cleandepsmap.size && installed) map_grow(&solv->cleandepsmap, installed->end - installed->start); if (select == SOLVER_SOLVABLE) { p = what; d = 0; } else { queue_empty(&q); FOR_JOB_SELECT(p, pp, select, what) queue_push(&q, p); if (!q.count) { if (select == SOLVER_SOLVABLE_ONE_OF) break; /* ignore empty installs */ /* no candidate found or unsupported, make this an impossible rule */ queue_push(&q, -SYSTEMSOLVABLE); } p = queue_shift(&q); /* get first candidate */ d = !q.count ? 0 : pool_queuetowhatprovides(pool, &q); /* internalize */ } /* force install of namespace supplements hack */ if (select == SOLVER_SOLVABLE_PROVIDES && !d && (p == SYSTEMSOLVABLE || p == -SYSTEMSOLVABLE) && ISRELDEP(what)) { Reldep *rd = GETRELDEP(pool, what); if (rd->flags == REL_NAMESPACE) { p = SYSTEMSOLVABLE; if (!solv->installsuppdepq) { solv->installsuppdepq = solv_calloc(1, sizeof(Queue)); queue_init(solv->installsuppdepq); } queue_pushunique(solv->installsuppdepq, rd->evr == 0 ? rd->name : what); } } solver_addjobrule(solv, p, d, i, weak); if (how & SOLVER_FORCEBEST) hasbestinstalljob = 1; break; case SOLVER_ERASE: POOL_DEBUG(SOLV_DEBUG_JOB, "job: %s%serase %s\n", weak ? "weak " : "", how & SOLVER_CLEANDEPS ? "clean deps " : "", solver_select2str(pool, select, what)); if ((how & SOLVER_CLEANDEPS) != 0 && !solv->cleandepsmap.size && installed) map_grow(&solv->cleandepsmap, installed->end - installed->start); /* specific solvable: by id or by nevra */ name = (select == SOLVER_SOLVABLE || (select == SOLVER_SOLVABLE_NAME && ISRELDEP(what))) ? 0 : -1; if (select == SOLVER_SOLVABLE_ALL) /* hmmm ;) */ { FOR_POOL_SOLVABLES(p) solver_addjobrule(solv, -p, 0, i, weak); } else if (select == SOLVER_SOLVABLE_REPO) { Repo *repo = pool_id2repo(pool, what); if (repo) FOR_REPO_SOLVABLES(repo, p, s) solver_addjobrule(solv, -p, 0, i, weak); } FOR_JOB_SELECT(p, pp, select, what) { s = pool->solvables + p; if (installed && s->repo == installed) name = !name ? s->name : -1; solver_addjobrule(solv, -p, 0, i, weak); } /* special case for "erase a specific solvable": we also * erase all other solvables with that name, so that they * don't get picked up as replacement. * name is > 0 if exactly one installed solvable matched. */ /* XXX: look also at packages that obsolete this package? */ if (name > 0) { int j, k; k = solv->nrules; FOR_PROVIDES(p, pp, name) { s = pool->solvables + p; if (s->name != name) continue; /* keep other versions installed */ if (s->repo == installed) continue; /* keep installcandidates of other jobs */ if (MAPTST(&installcandidatemap, p)) continue; /* don't add the same rule twice */ for (j = oldnrules; j < k; j++) if (solv->rules[j].p == -p) break; if (j == k) solver_addjobrule(solv, -p, 0, i, weak); /* remove by id */ } } break; case SOLVER_UPDATE: POOL_DEBUG(SOLV_DEBUG_JOB, "job: %supdate %s\n", weak ? "weak " : "", solver_select2str(pool, select, what)); break; case SOLVER_VERIFY: POOL_DEBUG(SOLV_DEBUG_JOB, "job: %sverify %s\n", weak ? "weak " : "", solver_select2str(pool, select, what)); break; case SOLVER_WEAKENDEPS: POOL_DEBUG(SOLV_DEBUG_JOB, "job: %sweaken deps %s\n", weak ? "weak " : "", solver_select2str(pool, select, what)); if (select != SOLVER_SOLVABLE) break; s = pool->solvables + what; weaken_solvable_deps(solv, what); break; case SOLVER_MULTIVERSION: POOL_DEBUG(SOLV_DEBUG_JOB, "job: %smultiversion %s\n", weak ? "weak " : "", solver_select2str(pool, select, what)); break; case SOLVER_LOCK: POOL_DEBUG(SOLV_DEBUG_JOB, "job: %slock %s\n", weak ? "weak " : "", solver_select2str(pool, select, what)); if (select == SOLVER_SOLVABLE_ALL) { FOR_POOL_SOLVABLES(p) solver_addjobrule(solv, installed && pool->solvables[p].repo == installed ? p : -p, 0, i, weak); } else if (select == SOLVER_SOLVABLE_REPO) { Repo *repo = pool_id2repo(pool, what); if (repo) FOR_REPO_SOLVABLES(repo, p, s) solver_addjobrule(solv, installed && pool->solvables[p].repo == installed ? p : -p, 0, i, weak); } FOR_JOB_SELECT(p, pp, select, what) solver_addjobrule(solv, installed && pool->solvables[p].repo == installed ? p : -p, 0, i, weak); break; case SOLVER_DISTUPGRADE: POOL_DEBUG(SOLV_DEBUG_JOB, "job: distupgrade %s\n", solver_select2str(pool, select, what)); break; case SOLVER_DROP_ORPHANED: POOL_DEBUG(SOLV_DEBUG_JOB, "job: drop orphaned %s\n", solver_select2str(pool, select, what)); if (select == SOLVER_SOLVABLE_ALL || (select == SOLVER_SOLVABLE_REPO && installed && what == installed->repoid)) solv->droporphanedmap_all = 1; FOR_JOB_SELECT(p, pp, select, what) { s = pool->solvables + p; if (!installed || s->repo != installed) continue; if (!solv->droporphanedmap.size) map_grow(&solv->droporphanedmap, installed->end - installed->start); MAPSET(&solv->droporphanedmap, p - installed->start); } break; case SOLVER_USERINSTALLED: POOL_DEBUG(SOLV_DEBUG_JOB, "job: user installed %s\n", solver_select2str(pool, select, what)); break; default: POOL_DEBUG(SOLV_DEBUG_JOB, "job: unknown job\n"); break; } /* * debug */ IF_POOLDEBUG (SOLV_DEBUG_JOB) { int j; if (solv->nrules == oldnrules) POOL_DEBUG(SOLV_DEBUG_JOB, " - no rule created\n"); for (j = oldnrules; j < solv->nrules; j++) { POOL_DEBUG(SOLV_DEBUG_JOB, " - job "); solver_printrule(solv, SOLV_DEBUG_JOB, solv->rules + j); } } } assert(solv->ruletojob.count == solv->nrules - solv->jobrules); solv->jobrules_end = solv->nrules; /* now create infarch and dup rules */ if (!solv->noinfarchcheck) { solver_addinfarchrules(solv, &addedmap); if (pool->implicitobsoleteusescolors) { /* currently doesn't work well with infarch rules, so make * them weak */ for (i = solv->infarchrules; i < solv->infarchrules_end; i++) queue_push(&solv->weakruleq, i); } } else solv->infarchrules = solv->infarchrules_end = solv->nrules; if (hasdupjob) solver_addduprules(solv, &addedmap); else solv->duprules = solv->duprules_end = solv->nrules; if (solv->bestupdatemap_all || solv->bestupdatemap.size || hasbestinstalljob) solver_addbestrules(solv, hasbestinstalljob); else solv->bestrules = solv->bestrules_end = solv->nrules; if (hasdupjob) solver_freedupmaps(solv); /* no longer needed */ if (1) solver_addchoicerules(solv); else solv->choicerules = solv->choicerules_end = solv->nrules; if (0) { for (i = solv->featurerules; i < solv->nrules; i++) solver_printruleclass(solv, SOLV_DEBUG_RESULT, solv->rules + i); } /* all rules created * -------------------------------------------------------------- * prepare for solving */ /* free unneeded memory */ map_free(&addedmap); map_free(&installcandidatemap); queue_free(&q); POOL_DEBUG(SOLV_DEBUG_STATS, "%d rpm rules, 2 * %d update rules, %d job rules, %d infarch rules, %d dup rules, %d choice rules, %d best rules\n", solv->rpmrules_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); POOL_DEBUG(SOLV_DEBUG_STATS, "overall rule memory used: %d K\n", solv->nrules * (int)sizeof(Rule) / 1024); /* create weak map */ map_init(&solv->weakrulemap, solv->nrules); for (i = 0; i < solv->weakruleq.count; i++) { p = solv->weakruleq.elements[i]; MAPSET(&solv->weakrulemap, p); } /* enable cleandepsmap creation if we have updatepkgs */ if (solv->cleandeps_updatepkgs && !solv->cleandepsmap.size) map_grow(&solv->cleandepsmap, installed->end - installed->start); /* no mistakes */ if (solv->cleandeps_mistakes) { queue_free(solv->cleandeps_mistakes); solv->cleandeps_mistakes = solv_free(solv->cleandeps_mistakes); } /* all new rules are learnt after this point */ solv->learntrules = solv->nrules; /* create watches chains */ makewatches(solv); /* create assertion index. it is only used to speed up * makeruledecsions() a bit */ for (i = 1, r = solv->rules + i; i < solv->nrules; i++, r++) if (r->p && !r->w2 && (r->d == 0 || r->d == -1)) queue_push(&solv->ruleassertions, i); /* disable update rules that conflict with our job */ solver_disablepolicyrules(solv); /* make initial decisions based on assertion rules */ makeruledecisions(solv); POOL_DEBUG(SOLV_DEBUG_SOLVER, "problems so far: %d\n", solv->problems.count); /* * ******************************************** * solve! * ******************************************** */ now = solv_timems(0); solver_run_sat(solv, 1, solv->dontinstallrecommended ? 0 : 1); POOL_DEBUG(SOLV_DEBUG_STATS, "solver took %d ms\n", solv_timems(now)); /* * prepare solution queue if there were problems */ solver_prepare_solutions(solv); 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); POOL_DEBUG(SOLV_DEBUG_STATS, "solver_solve took %d ms\n", solv_timems(solve_start)); /* return number of problems */ return solv->problems.count ? solv->problems.count / 2 : 0; } Transaction * solver_create_transaction(Solver *solv) { return transaction_create_decisionq(solv->pool, &solv->decisionq, &solv->multiversion); } void solver_get_orphaned(Solver *solv, Queue *orphanedq) { queue_free(orphanedq); queue_init_clone(orphanedq, &solv->orphaned); } void solver_get_recommendations(Solver *solv, Queue *recommendationsq, Queue *suggestionsq, int noselected) { Pool *pool = solv->pool; Queue redoq, disabledq; int goterase, i; Solvable *s; Rule *r; Map obsmap; if (!recommendationsq && !suggestionsq) return; map_init(&obsmap, pool->nsolvables); if (solv->installed) { Id obs, *obsp, p, po, ppo; for (p = solv->installed->start; p < solv->installed->end; p++) { s = pool->solvables + p; if (s->repo != solv->installed || !s->obsoletes) continue; if (solv->decisionmap[p] <= 0) continue; if (solv->multiversion.size && MAPTST(&solv->multiversion, p)) continue; obsp = s->repo->idarraydata + s->obsoletes; /* foreach obsoletes */ while ((obs = *obsp++) != 0) FOR_PROVIDES(po, ppo, obs) MAPSET(&obsmap, po); } } queue_init(&redoq); queue_init(&disabledq); goterase = 0; /* disable all erase jobs (including weak "keep uninstalled" rules) */ for (i = solv->jobrules, r = solv->rules + i; i < solv->jobrules_end; i++, r++) { if (r->d < 0) /* disabled ? */ continue; if (r->p >= 0) /* install job? */ continue; queue_push(&disabledq, i); solver_disablerule(solv, r); goterase++; } if (goterase) { enabledisablelearntrules(solv); removedisabledconflicts(solv, &redoq); } /* * find recommended packages */ if (recommendationsq) { Id rec, *recp, p, pp; queue_empty(recommendationsq); /* create map of all recommened packages */ solv->recommends_index = -1; MAPZERO(&solv->recommendsmap); /* put all packages the solver already chose in the map */ if (solv->decisioncnt_weak) { for (i = solv->decisioncnt_weak; i < solv->decisioncnt_orphan; i++) { Id why; why = solv->decisionq_why.elements[i]; if (why) continue; /* forced by unit rule */ p = solv->decisionq.elements[i]; if (p < 0) continue; MAPSET(&solv->recommendsmap, p); } } for (i = 0; i < solv->decisionq.count; i++) { p = solv->decisionq.elements[i]; if (p < 0) continue; s = pool->solvables + p; if (s->recommends) { recp = s->repo->idarraydata + s->recommends; while ((rec = *recp++) != 0) { FOR_PROVIDES(p, pp, rec) if (solv->decisionmap[p] > 0) break; if (p) { if (!noselected) { FOR_PROVIDES(p, pp, rec) if (solv->decisionmap[p] > 0) MAPSET(&solv->recommendsmap, p); } continue; /* p != 0: already fulfilled */ } FOR_PROVIDES(p, pp, rec) MAPSET(&solv->recommendsmap, p); } } } for (i = 1; i < pool->nsolvables; i++) { if (solv->decisionmap[i] < 0) continue; if (solv->decisionmap[i] > 0 && noselected) continue; if (MAPTST(&obsmap, i)) continue; s = pool->solvables + i; if (!MAPTST(&solv->recommendsmap, i)) { if (!s->supplements) continue; if (!pool_installable(pool, s)) continue; if (!solver_is_supplementing(solv, s)) continue; } queue_push(recommendationsq, i); } /* we use MODE_SUGGEST here so that repo prio is ignored */ policy_filter_unwanted(solv, recommendationsq, POLICY_MODE_SUGGEST); } /* * find suggested packages */ if (suggestionsq) { Id sug, *sugp, p, pp; queue_empty(suggestionsq); /* create map of all suggests that are still open */ solv->recommends_index = -1; MAPZERO(&solv->suggestsmap); for (i = 0; i < solv->decisionq.count; i++) { p = solv->decisionq.elements[i]; if (p < 0) continue; s = pool->solvables + p; if (s->suggests) { sugp = s->repo->idarraydata + s->suggests; while ((sug = *sugp++) != 0) { FOR_PROVIDES(p, pp, sug) if (solv->decisionmap[p] > 0) break; if (p) { if (!noselected) { FOR_PROVIDES(p, pp, sug) if (solv->decisionmap[p] > 0) MAPSET(&solv->suggestsmap, p); } continue; /* already fulfilled */ } FOR_PROVIDES(p, pp, sug) MAPSET(&solv->suggestsmap, p); } } } for (i = 1; i < pool->nsolvables; i++) { if (solv->decisionmap[i] < 0) continue; if (solv->decisionmap[i] > 0 && noselected) continue; if (MAPTST(&obsmap, i)) continue; s = pool->solvables + i; if (!MAPTST(&solv->suggestsmap, i)) { if (!s->enhances) continue; if (!pool_installable(pool, s)) continue; if (!solver_is_enhancing(solv, s)) continue; } queue_push(suggestionsq, i); } policy_filter_unwanted(solv, suggestionsq, POLICY_MODE_SUGGEST); } /* undo removedisabledconflicts */ if (redoq.count) undo_removedisabledconflicts(solv, &redoq); queue_free(&redoq); /* undo job rule disabling */ for (i = 0; i < disabledq.count; i++) solver_enablerule(solv, solv->rules + disabledq.elements[i]); queue_free(&disabledq); map_free(&obsmap); } /***********************************************************************/ /* disk usage computations */ /*------------------------------------------------------------------- * * calculate DU changes */ void solver_calc_duchanges(Solver *solv, DUChanges *mps, int nmps) { Map installedmap; solver_create_state_maps(solv, &installedmap, 0); pool_calc_duchanges(solv->pool, &installedmap, mps, nmps); map_free(&installedmap); } /*------------------------------------------------------------------- * * calculate changes in install size */ int solver_calc_installsizechange(Solver *solv) { Map installedmap; int change; solver_create_state_maps(solv, &installedmap, 0); change = pool_calc_installsizechange(solv->pool, &installedmap); map_free(&installedmap); return change; } void solver_create_state_maps(Solver *solv, Map *installedmap, Map *conflictsmap) { pool_create_state_maps(solv->pool, &solv->decisionq, installedmap, conflictsmap); } void solver_trivial_installable(Solver *solv, Queue *pkgs, Queue *res) { Pool *pool = solv->pool; Map installedmap; int i; pool_create_state_maps(pool, &solv->decisionq, &installedmap, 0); pool_trivial_installable_multiversionmap(pool, &installedmap, pkgs, res, solv->multiversion.size ? &solv->multiversion : 0); for (i = 0; i < res->count; i++) if (res->elements[i] != -1) { Solvable *s = pool->solvables + pkgs->elements[i]; if (!strncmp("patch:", pool_id2str(pool, s->name), 6) && solvable_is_irrelevant_patch(s, &installedmap)) res->elements[i] = -1; } map_free(&installedmap); } /*------------------------------------------------------------------- * * decision introspection */ int solver_get_decisionlevel(Solver *solv, Id p) { return solv->decisionmap[p]; } void solver_get_decisionqueue(Solver *solv, Queue *decisionq) { queue_free(decisionq); queue_init_clone(decisionq, &solv->decisionq); } int solver_get_lastdecisionblocklevel(Solver *solv) { Id p; if (solv->decisionq.count == 0) return 0; p = solv->decisionq.elements[solv->decisionq.count - 1]; if (p < 0) p = -p; return solv->decisionmap[p] < 0 ? -solv->decisionmap[p] : solv->decisionmap[p]; } void solver_get_decisionblock(Solver *solv, int level, Queue *decisionq) { Id p; int i; queue_empty(decisionq); for (i = 0; i < solv->decisionq.count; i++) { p = solv->decisionq.elements[i]; if (p < 0) p = -p; if (solv->decisionmap[p] == level || solv->decisionmap[p] == -level) break; } if (i == solv->decisionq.count) return; for (i = 0; i < solv->decisionq.count; i++) { p = solv->decisionq.elements[i]; if (p < 0) p = -p; if (solv->decisionmap[p] == level || solv->decisionmap[p] == -level) queue_push(decisionq, p); else break; } } int solver_describe_decision(Solver *solv, Id p, Id *infop) { int i; Id pp, why; if (infop) *infop = 0; if (!solv->decisionmap[p]) return SOLVER_REASON_UNRELATED; pp = solv->decisionmap[p] < 0 ? -p : p; for (i = 0; i < solv->decisionq.count; i++) if (solv->decisionq.elements[i] == pp) break; if (i == solv->decisionq.count) /* just in case... */ return SOLVER_REASON_UNRELATED; why = solv->decisionq_why.elements[i]; if (why > 0) { if (infop) *infop = why; return SOLVER_REASON_UNIT_RULE; } why = -why; if (i < solv->decisioncnt_update) { if (i == 0) { if (infop) *infop = SYSTEMSOLVABLE; return SOLVER_REASON_KEEP_INSTALLED; } if (infop) *infop = why; return SOLVER_REASON_RESOLVE_JOB; } if (i < solv->decisioncnt_keep) { if (why == 0 && pp < 0) return SOLVER_REASON_CLEANDEPS_ERASE; if (infop) { if (why >= solv->updaterules && why < solv->updaterules_end) *infop = why - solv->updaterules; else if (why >= solv->featurerules && why < solv->featurerules_end) *infop = why - solv->featurerules; } return SOLVER_REASON_UPDATE_INSTALLED; } if (i < solv->decisioncnt_resolve) { if (why == 0 && pp < 0) return SOLVER_REASON_CLEANDEPS_ERASE; if (infop) { if (why >= solv->updaterules && why < solv->updaterules_end) *infop = why - solv->updaterules; else if (why >= solv->featurerules && why < solv->featurerules_end) *infop = why - solv->featurerules; } return SOLVER_REASON_KEEP_INSTALLED; } if (i < solv->decisioncnt_weak) { if (infop) *infop = why; return SOLVER_REASON_RESOLVE; } if (solv->decisionq.count < solv->decisioncnt_orphan) return SOLVER_REASON_WEAKDEP; return SOLVER_REASON_RESOLVE_ORPHAN; } void solver_describe_weakdep_decision(Solver *solv, Id p, Queue *whyq) { Pool *pool = solv->pool; int i; int level = solv->decisionmap[p]; int decisionno; Solvable *s; queue_empty(whyq); if (level < 0) return; /* huh? */ for (decisionno = 0; decisionno < solv->decisionq.count; decisionno++) if (solv->decisionq.elements[decisionno] == p) break; if (decisionno == solv->decisionq.count) return; /* huh? */ if (decisionno < solv->decisioncnt_weak || decisionno >= solv->decisioncnt_orphan) return; /* huh? */ /* 1) list all packages that recommend us */ for (i = 1; i < pool->nsolvables; i++) { Id *recp, rec, pp2, p2; if (solv->decisionmap[i] < 0 || solv->decisionmap[i] >= level) continue; s = pool->solvables + i; if (!s->recommends) continue; if (!solv->addalreadyrecommended && s->repo == solv->installed) continue; recp = s->repo->idarraydata + s->recommends; while ((rec = *recp++) != 0) { int found = 0; FOR_PROVIDES(p2, pp2, rec) { if (p2 == p) found = 1; else { /* if p2 is already installed, this recommends is ignored */ if (solv->decisionmap[p2] > 0 && solv->decisionmap[p2] < level) break; } } if (!p2 && found) { queue_push(whyq, SOLVER_REASON_RECOMMENDED); queue_push2(whyq, p2, rec); } } } /* 2) list all supplements */ s = pool->solvables + p; if (s->supplements && level > 0) { Id *supp, sup, pp2, p2; /* this is a hack. to use solver_dep_fulfilled we temporarily clear * everything above our level in the decisionmap */ for (i = decisionno; i < solv->decisionq.count; i++ ) { p2 = solv->decisionq.elements[i]; if (p2 > 0) solv->decisionmap[p2] = -solv->decisionmap[p2]; } supp = s->repo->idarraydata + s->supplements; while ((sup = *supp++) != 0) if (solver_dep_fulfilled(solv, sup)) { int found = 0; /* let's see if this is an easy supp */ FOR_PROVIDES(p2, pp2, sup) { if (!solv->addalreadyrecommended && solv->installed) { if (pool->solvables[p2].repo == solv->installed) continue; } if (solv->decisionmap[p2] > 0 && solv->decisionmap[p2] < level) { queue_push(whyq, SOLVER_REASON_SUPPLEMENTED); queue_push2(whyq, p2, sup); found = 1; } } if (!found) { /* hard case, just note dependency with no package */ queue_push(whyq, SOLVER_REASON_SUPPLEMENTED); queue_push2(whyq, 0, sup); } } for (i = decisionno; i < solv->decisionq.count; i++) { p2 = solv->decisionq.elements[i]; if (p2 > 0) solv->decisionmap[p2] = -solv->decisionmap[p2]; } } } void pool_job2solvables(Pool *pool, Queue *pkgs, Id how, Id what) { Id p, pp; how &= SOLVER_SELECTMASK; queue_empty(pkgs); if (how == SOLVER_SOLVABLE_ALL) { FOR_POOL_SOLVABLES(p) queue_push(pkgs, p); } else if (how == SOLVER_SOLVABLE_REPO) { Repo *repo = pool_id2repo(pool, what); Solvable *s; if (repo) FOR_REPO_SOLVABLES(repo, p, s) queue_push(pkgs, p); } else { FOR_JOB_SELECT(p, pp, how, what) queue_push(pkgs, p); } } int pool_isemptyupdatejob(Pool *pool, Id how, Id what) { Id p, pp, pi, pip; Id select = how & SOLVER_SELECTMASK; if ((how & SOLVER_JOBMASK) != SOLVER_UPDATE) return 0; if (select == SOLVER_SOLVABLE_ALL || select == SOLVER_SOLVABLE_REPO) return 0; if (!pool->installed) return 1; FOR_JOB_SELECT(p, pp, select, what) if (pool->solvables[p].repo == pool->installed) return 0; /* hard work */ FOR_JOB_SELECT(p, pp, select, what) { Solvable *s = pool->solvables + p; FOR_PROVIDES(pi, pip, s->name) { Solvable *si = pool->solvables + pi; if (si->repo != pool->installed || si->name != s->name) continue; return 0; } if (s->obsoletes) { Id obs, *obsp = s->repo->idarraydata + s->obsoletes; while ((obs = *obsp++) != 0) { FOR_PROVIDES(pi, pip, obs) { Solvable *si = pool->solvables + pi; if (si->repo != pool->installed) continue; if (!pool->obsoleteusesprovides && !pool_match_nevr(pool, si, obs)) continue; if (pool->obsoleteusescolors && !pool_colormatch(pool, s, si)) continue; return 0; } } } } return 1; } const char * solver_select2str(Pool *pool, Id select, Id what) { const char *s; char *b; select &= SOLVER_SELECTMASK; if (select == SOLVER_SOLVABLE) return pool_solvid2str(pool, what); if (select == SOLVER_SOLVABLE_NAME) return pool_dep2str(pool, what); if (select == SOLVER_SOLVABLE_PROVIDES) { s = pool_dep2str(pool, what); b = pool_alloctmpspace(pool, 11 + strlen(s)); sprintf(b, "providing %s", s); return b; } if (select == SOLVER_SOLVABLE_ONE_OF) { Id p; b = 0; while ((p = pool->whatprovidesdata[what++]) != 0) { s = pool_solvid2str(pool, p); if (b) b = pool_tmpappend(pool, b, ", ", s); else b = pool_tmpjoin(pool, s, 0, 0); pool_freetmpspace(pool, s); } return b ? b : "nothing"; } if (select == SOLVER_SOLVABLE_REPO) { b = pool_alloctmpspace(pool, 20); sprintf(b, "repo #%d", what); return b; } if (select == SOLVER_SOLVABLE_ALL) return "all packages"; return "unknown job select"; } const char * pool_job2str(Pool *pool, Id how, Id what, Id flagmask) { Id select = how & SOLVER_SELECTMASK; const char *strstart = 0, *strend = 0; char *s; int o; switch (how & SOLVER_JOBMASK) { case SOLVER_NOOP: return "do nothing"; case SOLVER_INSTALL: if (select == SOLVER_SOLVABLE && pool->installed && pool->solvables[what].repo == pool->installed) strstart = "keep ", strend = "installed"; else if (select == SOLVER_SOLVABLE || select == SOLVER_SOLVABLE_NAME) strstart = "install "; else if (select == SOLVER_SOLVABLE_PROVIDES) strstart = "install a package "; else strstart = "install one of "; break; case SOLVER_ERASE: if (select == SOLVER_SOLVABLE && !(pool->installed && pool->solvables[what].repo == pool->installed)) strstart = "keep ", strend = "unstalled"; else if (select == SOLVER_SOLVABLE_PROVIDES) strstart = "deinstall all packages "; else strstart = "deinstall "; break; case SOLVER_UPDATE: strstart = "update "; break; case SOLVER_WEAKENDEPS: strstart = "weaken deps of "; break; case SOLVER_MULTIVERSION: strstart = "multi version "; break; case SOLVER_LOCK: strstart = "update "; break; case SOLVER_DISTUPGRADE: strstart = "dist upgrade "; break; case SOLVER_VERIFY: strstart = "verify "; break; case SOLVER_DROP_ORPHANED: strstart = "deinstall ", strend = "if orphaned"; break; case SOLVER_USERINSTALLED: strstart = "regard ", strend = "as userinstalled"; break; default: strstart = "unknown job "; break; } s = pool_tmpjoin(pool, strstart, solver_select2str(pool, select, what), strend); how &= flagmask; if ((how & ~(SOLVER_SELECTMASK|SOLVER_JOBMASK)) == 0) return s; o = strlen(s); s = pool_tmpappend(pool, s, " ", 0); if (how & SOLVER_WEAK) s = pool_tmpappend(pool, s, ",weak", 0); if (how & SOLVER_ESSENTIAL) s = pool_tmpappend(pool, s, ",essential", 0); if (how & SOLVER_CLEANDEPS) s = pool_tmpappend(pool, s, ",cleandeps", 0); if (how & SOLVER_ORUPDATE) s = pool_tmpappend(pool, s, ",orupdate", 0); if (how & SOLVER_FORCEBEST) s = pool_tmpappend(pool, s, ",forcebest", 0); if (how & SOLVER_TARGETED) s = pool_tmpappend(pool, s, ",targeted", 0); if (how & SOLVER_SETEV) s = pool_tmpappend(pool, s, ",setev", 0); if (how & SOLVER_SETEVR) s = pool_tmpappend(pool, s, ",setevr", 0); if (how & SOLVER_SETARCH) s = pool_tmpappend(pool, s, ",setarch", 0); if (how & SOLVER_SETVENDOR) s = pool_tmpappend(pool, s, ",setvendor", 0); if (how & SOLVER_SETREPO) s = pool_tmpappend(pool, s, ",setrepo", 0); if (how & SOLVER_SETNAME) s = pool_tmpappend(pool, s, ",setname", 0); if (how & SOLVER_NOAUTOSET) s = pool_tmpappend(pool, s, ",noautoset", 0); if (s[o + 1] != ',') s = pool_tmpappend(pool, s, ",?", 0); s[o + 1] = '['; return pool_tmpappend(pool, s, "]", 0); }