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librazor/transaction.c
author Richard Hughes <richard@hughsie.com>
Sun Jun 29 17:32:19 2008 +0100 (2008-06-29)
changeset 301 4124c37fd953
parent 286 f9344e30a3b9
child 302 9b71b537d175
permissions -rw-r--r--
protect all exported functions by checking the input parameters for NULL input 
     1 /*

     2  * Copyright (C) 2008  Kristian Høgsberg <krh@redhat.com>

     3  * Copyright (C) 2008  Red Hat, Inc

     4  *

     5  * This program is free software; you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation; either version 2 of the License, or

     8  * (at your option) any later version.

     9  *

    10  * This program is distributed in the hope that it will be useful,

    11  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    13  * GNU General Public License for more details.

    14  *

    15  * You should have received a copy of the GNU General Public License along

    16  * with this program; if not, write to the Free Software Foundation, Inc.,

    17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

    18  */

    19 

    20 #define _GNU_SOURCE

    21 

    22 #include <stdlib.h>

    23 #include <stddef.h>

    24 #include <stdint.h>

    25 #include <stdio.h>

    26 #include <string.h>

    27 #include <sys/types.h>

    28 #include <sys/stat.h>

    29 #include <sys/mman.h>

    30 #include <unistd.h>

    31 #include <fcntl.h>

    32 #include <errno.h>

    33 #include <ctype.h>

    34 #include <fnmatch.h>

    35 #include <assert.h>

    36 

    37 #include "razor-internal.h"

    38 #include "razor.h"

    39 

    40 static int

    41 provider_satisfies_requirement(struct razor_property *provider,

    42 			       const char *provider_strings,

    43 			       uint32_t flags,

    44 			       const char *required)

    45 {

    46 	int cmp, len;

    47 	const char *provided = &provider_strings[provider->version];

    48 

    49 	if (!*required)

    50 		return 1;

    51 	if (!*provided) {

    52 		if (flags & RAZOR_PROPERTY_LESS)

    53 			return 0;

    54 		else

    55 			return 1;

    56 	}

    57 

    58 	cmp = razor_versioncmp(provided, required);

    59 

    60 	switch (flags & RAZOR_PROPERTY_RELATION_MASK) {

    61 	case RAZOR_PROPERTY_LESS:

    62 		return cmp < 0;

    63 

    64 	case RAZOR_PROPERTY_LESS | RAZOR_PROPERTY_EQUAL:

    65 		if (cmp <= 0)

    66 			return 1;

    67 		/* fall through: FIXME, make sure this is correct */

    68 

    69 	case RAZOR_PROPERTY_EQUAL:

    70 		if (cmp == 0)

    71 			return 1;

    72 

    73 		/* "foo == 1.1" is satisfied by "foo 1.1-2" */

    74 		len = strlen(required);

    75 		if (!strncmp(required, provided, len) && provided[len] == '-')

    76 			return 1;

    77 		return 0;

    78 

    79 	case RAZOR_PROPERTY_GREATER | RAZOR_PROPERTY_EQUAL:

    80 		return cmp >= 0;

    81 

    82 	case RAZOR_PROPERTY_GREATER:

    83 		return cmp > 0;

    84 	}

    85 

    86 	/* shouldn't happen */

    87 	return 0;

    88 }

    89 

    90 #define TRANS_PACKAGE_PRESENT		1

    91 #define TRANS_PACKAGE_UPDATE		2

    92 #define TRANS_PROPERTY_SATISFIED	0x80000000

    93 

    94 struct transaction_set {

    95 	struct razor_set *set;

    96 	uint32_t *packages;

    97 	uint32_t *properties;

    98 };

    99 

   100 struct razor_transaction {

   101 	int package_count, errors;

   102 	struct transaction_set system, upstream;

   103 	int changes;

   104 };

   105 

   106 static void

   107 transaction_set_init(struct transaction_set *ts, struct razor_set *set)

   108 {

   109 	int count;

   110 

   111 	ts->set = set;

   112 	count = set->packages.size / sizeof (struct razor_package);

   113 	ts->packages = zalloc(count * sizeof *ts->packages);

   114 	count = set->properties.size / sizeof (struct razor_property);

   115 	ts->properties = zalloc(count * sizeof *ts->properties);

   116 }

   117 

   118 static void

   119 transaction_set_release(struct transaction_set *ts)

   120 {

   121 	free(ts->packages);

   122 	free(ts->properties);

   123 }

   124 

   125 static void

   126 transaction_set_install_package(struct transaction_set *ts,

   127 				struct razor_package *package)

   128 {

   129 	struct razor_package *pkgs;

   130 	struct list *prop;

   131 	int i;

   132 

   133 	pkgs = ts->set->packages.data;

   134 	i = package - pkgs;

   135 	if (ts->packages[i] == TRANS_PACKAGE_PRESENT)

   136 		return;

   137 

   138 	ts->packages[i] = TRANS_PACKAGE_PRESENT;

   139 

   140 	prop = list_first(&package->properties, &ts->set->property_pool);

   141 	while (prop) {

   142 		ts->properties[prop->data]++;

   143 		prop = list_next(prop);

   144 	}

   145 }

   146 

   147 static void

   148 transaction_set_remove_package(struct transaction_set *ts,

   149 			       struct razor_package *package)

   150 {

   151 	struct razor_package *pkgs;

   152 	struct list *prop;

   153 	int i;

   154 

   155 	pkgs = ts->set->packages.data;

   156 	i = package - pkgs;

   157 	if (ts->packages[i] == 0)

   158 		return;

   159 

   160 	ts->packages[i] = 0;

   161 

   162 	prop = list_first(&package->properties, &ts->set->property_pool);

   163 	while (prop) {

   164 		ts->properties[prop->data]--;

   165 		prop = list_next(prop);

   166 	}

   167 }

   168 

   169 RAZOR_EXPORT struct razor_transaction *

   170 razor_transaction_create(struct razor_set *system, struct razor_set *upstream)

   171 {

   172 	struct razor_transaction *trans;

   173 	struct razor_package *p, *spkgs, *pend;

   174 

   175 	trans = zalloc(sizeof *trans);

   176 	transaction_set_init(&trans->system, system);

   177 	transaction_set_init(&trans->upstream, upstream);

   178 

   179 	spkgs = trans->system.set->packages.data;

   180 	pend = trans->system.set->packages.data +

   181 		trans->system.set->packages.size;

   182 	for (p = spkgs; p < pend; p++)

   183 		transaction_set_install_package(&trans->system, p);

   184 

   185 	return trans;

   186 }

   187 

   188 RAZOR_EXPORT void

   189 razor_transaction_install_package(struct razor_transaction *trans,

   190 				  struct razor_package *package)

   191 {

   192 	assert (trans != NULL);

   193 	assert (package != NULL);

   194 

   195 	transaction_set_install_package(&trans->upstream, package);

   196 	trans->changes++;

   197 }

   198 

   199 RAZOR_EXPORT void

   200 razor_transaction_remove_package(struct razor_transaction *trans,

   201 				 struct razor_package *package)

   202 {

   203 	assert (trans != NULL);

   204 	assert (package != NULL);

   205 

   206 	transaction_set_remove_package(&trans->system, package);

   207 	trans->changes++;

   208 }

   209 

   210 RAZOR_EXPORT void

   211 razor_transaction_update_package(struct razor_transaction *trans,

   212 				  struct razor_package *package)

   213 {

   214 	struct razor_package *spkgs, *upkgs, *end;

   215 

   216 	assert (trans != NULL);

   217 	assert (package != NULL);

   218 

   219 	spkgs = trans->system.set->packages.data;

   220 	upkgs = trans->upstream.set->packages.data;

   221 	end = trans->system.set->packages.data +

   222 		trans->system.set->packages.size;

   223 	if (spkgs <= package && package < end)

   224 		trans->system.packages[package - spkgs] |= TRANS_PACKAGE_UPDATE;

   225 	else

   226 		trans->upstream.packages[package - upkgs] |= TRANS_PACKAGE_UPDATE;

   227 }

   228 

   229 struct prop_iter {

   230 	struct razor_property *p, *start, *end;

   231 	const char *pool;

   232 	uint32_t *present;

   233 };

   234 

   235 static void

   236 prop_iter_init(struct prop_iter *pi, struct transaction_set *ts)

   237 {

   238 	pi->p = ts->set->properties.data;

   239 	pi->start = ts->set->properties.data;

   240 	pi->end = ts->set->properties.data + ts->set->properties.size;

   241 	pi->pool = ts->set->string_pool.data;

   242 	pi->present = ts->properties;

   243 }

   244 

   245 static int

   246 prop_iter_next(struct prop_iter *pi, uint32_t flags, struct razor_property **p)

   247 {

   248 	while (pi->p < pi->end) {

   249 		if ((pi->present[pi->p - pi->start] & ~TRANS_PROPERTY_SATISFIED) &&

   250 		    (pi->p->flags & RAZOR_PROPERTY_TYPE_MASK) == flags) {

   251 			*p = pi->p++;

   252 			return 1;

   253 		}

   254 		pi->p++;

   255 	}

   256 

   257 	return 0;

   258 }

   259 

   260 static struct razor_property *

   261 prop_iter_seek_to(struct prop_iter *pi,

   262 		  uint32_t flags, const char *match)

   263 {

   264 	uint32_t name;

   265 

   266 	while (pi->p < pi->end && strcmp(&pi->pool[pi->p->name], match) < 0)

   267 		pi->p++;

   268 

   269 	if (pi->p == pi->end || strcmp(&pi->pool[pi->p->name], match) > 0)

   270 		return NULL;

   271 

   272 	name = pi->p->name;

   273 	while (pi->p < pi->end &&

   274 	       pi->p->name == name &&

   275 	       (pi->p->flags & RAZOR_PROPERTY_TYPE_MASK) != flags)

   276 		pi->p++;

   277 

   278 	if (pi->p == pi->end || pi->p->name != name)

   279 		return NULL;

   280 

   281 	return pi->p;

   282 }

   283 

   284 /* Remove packages from set that provide any of the matching (same

   285  * name and type) providers from ppi onwards that match the

   286  * requirement that rpi points to. */

   287 static void

   288 remove_matching_providers(struct razor_transaction *trans,

   289 			  struct prop_iter *ppi,

   290 			  uint32_t flags,

   291 			  const char *version)

   292 {

   293 	struct razor_property *p;

   294 	struct razor_package *pkg, *pkgs;

   295 	struct razor_package_iterator pkg_iter;

   296 	struct razor_set *set;

   297 	const char *n, *v, *a;

   298 	uint32_t type;

   299 

   300 	if (ppi->present == trans->system.properties)

   301 		set = trans->system.set;

   302 	else

   303 		set = trans->upstream.set;

   304 

   305 	pkgs = (struct razor_package *) set->packages.data;

   306 	type = ppi->p->flags & RAZOR_PROPERTY_TYPE_MASK;

   307 	for (p = ppi->p;

   308 	     p < ppi->end &&

   309 	     p->name == ppi->p->name &&

   310 	     (p->flags & RAZOR_PROPERTY_TYPE_MASK) == type;

   311 	     p++) {

   312 		if (!ppi->present[p - ppi->start])

   313 			continue;

   314 		if (!provider_satisfies_requirement(p, ppi->pool,

   315 						    flags, version))

   316 			continue;

   317 

   318 		razor_package_iterator_init_for_property(&pkg_iter, set, p);

   319 		while (razor_package_iterator_next(&pkg_iter,

   320 						   &pkg, &n, &v, &a)) {

   321 			fprintf(stderr, "removing %s-%s\n", n, v);

   322 			razor_transaction_remove_package(trans, pkg);

   323 		}

   324 	}

   325 }

   326 

   327 static void

   328 flag_matching_providers(struct razor_transaction *trans,

   329 			struct prop_iter *ppi,

   330 			struct razor_property *r,

   331 			struct prop_iter *rpi,

   332 			unsigned int flag)

   333 {

   334 	struct razor_property *p;

   335 	struct razor_package *pkg, *pkgs;

   336 	struct razor_package_iterator pkg_iter;

   337 	struct razor_set *set;

   338 	const char *name, *version, *arch;

   339 	uint32_t *flags, type;

   340 

   341 	if (ppi->present == trans->system.properties) {

   342 		set = trans->system.set;

   343 		flags = trans->system.packages;

   344 	} else {

   345 		set = trans->upstream.set;

   346 		flags = trans->upstream.packages;

   347 	}

   348 

   349 	pkgs = (struct razor_package *) set->packages.data;

   350 	type = ppi->p->flags & RAZOR_PROPERTY_TYPE_MASK;

   351 	for (p = ppi->p;

   352 	     p < ppi->end &&

   353 		     p->name == ppi->p->name &&

   354 		     (p->flags & RAZOR_PROPERTY_TYPE_MASK) == type;

   355 	     p++) {

   356 		if (!ppi->present[p - ppi->start])

   357 			continue;

   358 		if (!provider_satisfies_requirement(p, ppi->pool,

   359 						    r->flags,

   360 						    &rpi->pool[r->version]))

   361 			continue;

   362 

   363 		razor_package_iterator_init_for_property(&pkg_iter, set, p);

   364 		while (razor_package_iterator_next(&pkg_iter, &pkg,

   365 						   &name, &version, &arch)) {

   366 

   367 			fprintf(stderr, "flagging %s-%s for providing %s matching %s %s\n",

   368 				name, version,

   369 				ppi->pool + p->name,

   370 				rpi->pool + r->name,

   371 				rpi->pool + r->version);

   372 			flags[pkg - pkgs] |= flag;

   373 		}

   374 	}

   375 }

   376 

   377 static struct razor_package *

   378 pick_matching_provider(struct razor_set *set,

   379 		       struct prop_iter *ppi,

   380 		       uint32_t flags,

   381 		       const char *version)

   382 {

   383 	struct razor_property *p;

   384 	struct razor_package *pkgs;

   385 	struct list *i;

   386 	uint32_t type;

   387 

   388 	/* This is where we decide which pkgs to pull in to satisfy a

   389 	 * requirement.  There may be several different providers

   390 	 * (different versions) and each version of a provider may

   391 	 * come from a number of packages.  We pick the first package

   392 	 * from the first provider that matches. */

   393 

   394 	pkgs = set->packages.data;

   395 	type = ppi->p->flags & RAZOR_PROPERTY_TYPE_MASK;

   396 	for (p = ppi->p;

   397 	     p < ppi->end &&

   398 		     p->name == ppi->p->name &&

   399 		     (p->flags & RAZOR_PROPERTY_TYPE_MASK) == type &&

   400 		     ppi->present[p - ppi->start] == 0;

   401 	     p++) {

   402 		if (!provider_satisfies_requirement(p, ppi->pool,

   403 						    flags, version))

   404 			continue;

   405 

   406 		i = list_first(&p->packages, &set->package_pool);

   407 

   408 		return &pkgs[i->data];

   409 	}

   410 

   411 	return NULL;

   412 }

   413 

   414 static void

   415 remove_obsoleted_packages(struct razor_transaction *trans)

   416 {

   417 	struct razor_property *up;

   418 	struct razor_package *spkgs;

   419 	struct prop_iter spi, upi;

   420 

   421 	spkgs = trans->system.set->packages.data;

   422 	prop_iter_init(&spi, &trans->system);

   423 	prop_iter_init(&upi, &trans->upstream);

   424 

   425 	while (prop_iter_next(&upi, RAZOR_PROPERTY_OBSOLETES, &up)) {

   426 		if (!prop_iter_seek_to(&spi, RAZOR_PROPERTY_PROVIDES,

   427 				       &upi.pool[up->name]))

   428 			continue;

   429 		remove_matching_providers(trans, &spi, up->flags,

   430 					  &upi.pool[up->version]);

   431 	}

   432 }

   433 

   434 static int

   435 any_provider_satisfies_requirement(struct prop_iter *ppi,

   436 				   uint32_t flags,

   437 				   const char *version)

   438 {

   439 	struct razor_property *p;

   440 	uint32_t type;

   441 

   442 	type = ppi->p->flags & RAZOR_PROPERTY_TYPE_MASK;

   443 	for (p = ppi->p;

   444 	     p < ppi->end &&

   445 		     p->name == ppi->p->name &&

   446 		     (p->flags & RAZOR_PROPERTY_TYPE_MASK) == type;

   447 	     p++) {

   448 		if (ppi->present[p - ppi->start] > 0 &&

   449 		    provider_satisfies_requirement(p, ppi->pool,

   450 						   flags, version))

   451 			return 1;

   452 	}

   453 

   454 	return 0;

   455 }

   456 

   457 static void

   458 clear_requires_flags(struct transaction_set *ts)

   459 {

   460 	struct razor_property *p;

   461 	const char *pool;

   462 	int i, count;

   463 

   464 	count = ts->set->properties.size / sizeof *p;

   465 	p = ts->set->properties.data;

   466 	pool = ts->set->string_pool.data;

   467 	for (i = 0; i < count; i++) {

   468 		ts->properties[i] &= ~TRANS_PROPERTY_SATISFIED;

   469 		if (strncmp(&pool[p[i].name], "rpmlib(", 7) == 0)

   470 			ts->properties[i] |= TRANS_PROPERTY_SATISFIED;

   471 	}

   472 }

   473 

   474 static void

   475 mark_satisfied_requires(struct razor_transaction *trans,

   476 			struct transaction_set *rts,

   477 			struct transaction_set *pts)

   478 {

   479 	struct prop_iter rpi, ppi;

   480 	struct razor_property *rp;

   481 

   482 	prop_iter_init(&rpi, rts);

   483 	prop_iter_init(&ppi, pts);

   484 

   485 	while (prop_iter_next(&rpi, RAZOR_PROPERTY_REQUIRES, &rp)) {

   486 		if (!prop_iter_seek_to(&ppi, RAZOR_PROPERTY_PROVIDES,

   487 				       &rpi.pool[rp->name]))

   488 			continue;

   489 

   490 		if (any_provider_satisfies_requirement(&ppi, rp->flags,

   491 						       &rpi.pool[rp->version]))

   492 			rpi.present[rp - rpi.start] |= TRANS_PROPERTY_SATISFIED;

   493 	}

   494 }

   495 

   496 static void

   497 mark_all_satisfied_requires(struct razor_transaction *trans)

   498 {

   499 	clear_requires_flags(&trans->system);

   500 	clear_requires_flags(&trans->upstream);

   501 	mark_satisfied_requires(trans, &trans->system, &trans->system);

   502 	mark_satisfied_requires(trans, &trans->system, &trans->upstream);

   503 	mark_satisfied_requires(trans, &trans->upstream, &trans->system);

   504 	mark_satisfied_requires(trans, &trans->upstream, &trans->upstream);

   505 }

   506 

   507 static void

   508 update_unsatisfied_packages(struct razor_transaction *trans)

   509 {

   510 	struct razor_package *spkgs, *pkg;

   511 	struct razor_property *sp;

   512 	struct prop_iter spi;

   513 	struct razor_package_iterator pkg_iter;

   514 	const char *name, *version, *arch;

   515 

   516 	spkgs = trans->system.set->packages.data;

   517 	prop_iter_init(&spi, &trans->system);

   518 

   519 	while (prop_iter_next(&spi, RAZOR_PROPERTY_REQUIRES, &sp)) {

   520 		if (spi.present[sp - spi.start] & TRANS_PROPERTY_SATISFIED)

   521 			continue;

   522 

   523 		razor_package_iterator_init_for_property(&pkg_iter,

   524 							 trans->system.set,

   525 							 sp);

   526 		while (razor_package_iterator_next(&pkg_iter, &pkg,

   527 						   &name, &version, &arch)) {

   528 			fprintf(stderr, "updating %s because %s %s %s "

   529 				"isn't satisfied\n",

   530 				name, spi.pool + sp->name,

   531 				razor_property_relation_to_string(sp),

   532 				spi.pool + sp->version);

   533 			trans->system.packages[pkg - spkgs] |=

   534 				TRANS_PACKAGE_UPDATE;

   535 		}

   536 	}

   537 }

   538 

   539 RAZOR_EXPORT void

   540 razor_transaction_update_all(struct razor_transaction *trans)

   541 {

   542 	struct razor_package *p;

   543 	int i, count;

   544 

   545 	assert (trans != NULL);

   546 

   547 	count = trans->system.set->packages.size / sizeof *p;

   548 	for (i = 0; i < count; i++)

   549 		trans->system.packages[i] |= TRANS_PACKAGE_UPDATE;

   550 }

   551 

   552 static void

   553 update_conflicted_packages(struct razor_transaction *trans)

   554 {

   555 	struct razor_package *pkg, *spkgs;

   556 	struct razor_property *up, *sp;

   557 	struct prop_iter spi, upi;

   558 	struct razor_package_iterator pkg_iter;

   559 	const char *name, *version, *arch;

   560 

   561 	spkgs = trans->system.set->packages.data;

   562 	prop_iter_init(&spi, &trans->system);

   563 	prop_iter_init(&upi, &trans->upstream);

   564 

   565 	while (prop_iter_next(&spi, RAZOR_PROPERTY_CONFLICTS, &sp)) {

   566 		if (!prop_iter_seek_to(&upi, RAZOR_PROPERTY_PROVIDES,

   567 				       &spi.pool[sp->name]))

   568 			continue;

   569 

   570 		if (!any_provider_satisfies_requirement(&upi, sp->flags,

   571 							&spi.pool[sp->version]))

   572 			continue;

   573 

   574 		razor_package_iterator_init_for_property(&pkg_iter,

   575 							 trans->system.set,

   576 							 sp);

   577 		while (razor_package_iterator_next(&pkg_iter, &pkg,

   578 						   &name, &version, &arch)) {

   579 			fprintf(stderr, "updating %s %s because it "

   580 				"conflicts with %s\n",

   581 				name, version, spi.pool + sp->name);

   582 			trans->system.packages[pkg - spkgs] |=

   583 				TRANS_PACKAGE_UPDATE;

   584 		}

   585 	}

   586 

   587 	prop_iter_init(&spi, &trans->system);

   588 	prop_iter_init(&upi, &trans->upstream);

   589 

   590 	while (prop_iter_next(&upi, RAZOR_PROPERTY_CONFLICTS, &up)) {

   591 		sp = prop_iter_seek_to(&spi, RAZOR_PROPERTY_PROVIDES,

   592 				       &upi.pool[upi.p->name]);

   593 

   594 		if (sp)

   595 			flag_matching_providers(trans, &spi, up, &upi,

   596 						TRANS_PACKAGE_UPDATE);

   597 	}

   598 }

   599 

   600 static void

   601 pull_in_requirements(struct razor_transaction *trans,

   602 		     struct prop_iter *rpi, struct prop_iter *ppi)

   603 {

   604 	struct razor_property *rp, *pp;

   605 	struct razor_package *pkg, *upkgs;

   606 

   607 	upkgs = trans->upstream.set->packages.data;

   608 	while (prop_iter_next(rpi, RAZOR_PROPERTY_REQUIRES, &rp)) {

   609 		if (rpi->present[rp - rpi->start] & TRANS_PROPERTY_SATISFIED)

   610 			continue;

   611 

   612 		pp = prop_iter_seek_to(ppi, RAZOR_PROPERTY_PROVIDES,

   613 				       &rpi->pool[rp->name]);

   614 		if (pp == NULL)

   615 			continue;

   616 		pkg = pick_matching_provider(trans->upstream.set,

   617 					     ppi, rp->flags,

   618 					     &rpi->pool[rp->version]);

   619 		if (pkg == NULL)

   620 			continue;

   621 

   622 		rpi->present[rp - rpi->start] |= TRANS_PROPERTY_SATISFIED;

   623 

   624 		fprintf(stderr, "pulling in %s-%s.%s which provides %s %s %s "

   625 			"to satisfy %s %s %s\n",

   626 			ppi->pool + pkg->name,

   627 			ppi->pool + pkg->version,

   628 			ppi->pool + pkg->arch,

   629 			ppi->pool + pp->name,

   630 			razor_property_relation_to_string(pp),

   631 			ppi->pool + pp->version,

   632 			&rpi->pool[rp->name],

   633 			razor_property_relation_to_string(rp),

   634 			&rpi->pool[rp->version]);

   635 

   636 		trans->upstream.packages[pkg - upkgs] |= TRANS_PACKAGE_UPDATE;

   637 	}

   638 }

   639 

   640 static void

   641 pull_in_all_requirements(struct razor_transaction *trans)

   642 {

   643 	struct prop_iter rpi, ppi;

   644 

   645 	prop_iter_init(&rpi, &trans->system);

   646 	prop_iter_init(&ppi, &trans->upstream);

   647 	pull_in_requirements(trans, &rpi, &ppi);

   648 

   649 	prop_iter_init(&rpi, &trans->upstream);

   650 	prop_iter_init(&ppi, &trans->upstream);

   651 	pull_in_requirements(trans, &rpi, &ppi);

   652 }

   653 

   654 static void

   655 flush_scheduled_system_updates(struct razor_transaction *trans)

   656 {

   657  	struct razor_package_iterator *pi;

   658  	struct razor_package *p, *pkg, *spkgs;

   659 	struct prop_iter ppi;

   660 	const char *name, *version, *arch;

   661 

   662 	spkgs = trans->system.set->packages.data;

   663 	pi = razor_package_iterator_create(trans->system.set);

   664 	prop_iter_init(&ppi, &trans->upstream);

   665 

   666 	while (razor_package_iterator_next(pi, &p, &name, &version, &arch)) {

   667 		if (!(trans->system.packages[p - spkgs] & TRANS_PACKAGE_UPDATE))

   668 			continue;

   669 

   670 		if (!prop_iter_seek_to(&ppi, RAZOR_PROPERTY_PROVIDES, name))

   671 			continue;

   672 

   673 		pkg = pick_matching_provider(trans->upstream.set, &ppi,

   674 					     RAZOR_PROPERTY_GREATER, version);

   675 		if (pkg == NULL)

   676 			continue;

   677 

   678 		fprintf(stderr, "updating %s-%s to %s-%s\n",

   679 			name, version,

   680 			&ppi.pool[pkg->name], &ppi.pool[pkg->version]);

   681 

   682 		razor_transaction_remove_package(trans, p);

   683 		razor_transaction_install_package(trans, pkg);

   684 	}

   685 

   686 	razor_package_iterator_destroy(pi);

   687 }

   688 

   689 static void

   690 flush_scheduled_upstream_updates(struct razor_transaction *trans)

   691 {

   692  	struct razor_package_iterator *pi;

   693  	struct razor_package *p, *upkgs;

   694 	struct prop_iter spi;

   695 	const char *name, *version, *arch;

   696 

   697 	upkgs = trans->upstream.set->packages.data;

   698 	pi = razor_package_iterator_create(trans->upstream.set);

   699 	prop_iter_init(&spi, &trans->system);

   700 

   701 	while (razor_package_iterator_next(pi, &p, &name, &version, &arch)) {

   702 		if (!(trans->upstream.packages[p - upkgs] & TRANS_PACKAGE_UPDATE))

   703 			continue;

   704 

   705 		if (prop_iter_seek_to(&spi, RAZOR_PROPERTY_PROVIDES, name))

   706 			remove_matching_providers(trans,

   707 						  &spi,

   708 						  RAZOR_PROPERTY_LESS,

   709 						  version);

   710 		razor_transaction_install_package(trans, p);

   711 		fprintf(stderr, "installing %s-%s\n", name, version);

   712 	}

   713 }

   714 

   715 RAZOR_EXPORT int

   716 razor_transaction_resolve(struct razor_transaction *trans)

   717 {

   718 	int last = 0;

   719 

   720 	flush_scheduled_system_updates(trans);

   721 	flush_scheduled_upstream_updates(trans);

   722 

   723 	while (last < trans->changes) {

   724 		last = trans->changes;

   725 		remove_obsoleted_packages(trans);

   726 		mark_all_satisfied_requires(trans);

   727 		update_unsatisfied_packages(trans);

   728 		update_conflicted_packages(trans);

   729 		pull_in_all_requirements(trans);

   730 		flush_scheduled_system_updates(trans);

   731 		flush_scheduled_upstream_updates(trans);

   732 	}

   733 

   734 	return trans->changes;

   735 }

   736 

   737 static void

   738 describe_unsatisfied(struct razor_set *set, struct razor_property *rp)

   739 {

   740 	struct razor_package_iterator pi;

   741 	struct razor_package *pkg;

   742 	const char *name, *version, *arch, *pool;

   743 

   744 	pool = set->string_pool.data;

   745 	if (pool[rp->version] == '\0') {

   746 		razor_package_iterator_init_for_property(&pi, set, rp);

   747 		while (razor_package_iterator_next(&pi, &pkg,

   748 						   &name, &version, &arch))

   749 			fprintf(stderr, "%s is needed by %s-%s.%s\n",

   750 				&pool[rp->name],

   751 				name, version, arch);

   752 	} else {

   753 		razor_package_iterator_init_for_property(&pi, set, rp);

   754 		while (razor_package_iterator_next(&pi, &pkg,

   755 						   &name, &version, &arch))

   756 			fprintf(stderr, "%s %s %s is needed by %s-%s.%s\n",

   757 				&pool[rp->name],

   758 				razor_property_relation_to_string(rp),

   759 				&pool[rp->version],

   760 				name, version, arch);

   761 	}

   762 }

   763 

   764 RAZOR_EXPORT int

   765 razor_transaction_describe(struct razor_transaction *trans)

   766 {

   767 	struct prop_iter rpi;

   768 	struct razor_property *rp;

   769 	int unsatisfied;

   770 

   771 	flush_scheduled_system_updates(trans);

   772 	flush_scheduled_upstream_updates(trans);

   773 	mark_all_satisfied_requires(trans);

   774 

   775 	unsatisfied = 0;

   776 	prop_iter_init(&rpi, &trans->system);

   777 	while (prop_iter_next(&rpi, RAZOR_PROPERTY_REQUIRES, &rp)) {

   778 		if (!(rpi.present[rp - rpi.start] & TRANS_PROPERTY_SATISFIED)) {

   779 			describe_unsatisfied(trans->system.set, rp);

   780 		        unsatisfied++;

   781 		}

   782 	}

   783 

   784 	prop_iter_init(&rpi, &trans->upstream);

   785 	while (prop_iter_next(&rpi, RAZOR_PROPERTY_REQUIRES, &rp)) {

   786 		if (!(rpi.present[rp - rpi.start] & TRANS_PROPERTY_SATISFIED)) {

   787 			describe_unsatisfied(trans->upstream.set, rp);

   788 			unsatisfied++;

   789 		}

   790 	}

   791 

   792 	return unsatisfied;

   793 }

   794 

   795 RAZOR_EXPORT int

   796 razor_transaction_unsatisfied_property(struct razor_transaction *trans,

   797 				       const char *name,

   798 				       uint32_t flags,

   799 				       const char *version)

   800 {

   801 	struct prop_iter pi;

   802 	struct razor_property *p;

   803 

   804 	prop_iter_init(&pi, &trans->system);

   805 	while (prop_iter_next(&pi, flags & RAZOR_PROPERTY_TYPE_MASK, &p)) {

   806 		if (!(trans->system.properties[p - pi.start] & TRANS_PROPERTY_SATISFIED) &&

   807 		    p->flags == flags &&

   808 		    strcmp(&pi.pool[p->name], name) == 0 &&

   809 		    strcmp(&pi.pool[p->version], version) == 0)

   810 

   811 			return 1;

   812 	}

   813 

   814 	prop_iter_init(&pi, &trans->upstream);

   815 	while (prop_iter_next(&pi, flags & RAZOR_PROPERTY_TYPE_MASK, &p)) {

   816 		if (!(trans->upstream.properties[p - pi.start] & TRANS_PROPERTY_SATISFIED) &&

   817 		    p->flags == flags &&

   818 		    strcmp(&pi.pool[p->name], name) == 0 &&

   819 		    strcmp(&pi.pool[p->version], version) == 0)

   820 

   821 			return 1;

   822 	}

   823 

   824 	return 0;

   825 }

   826 

   827 RAZOR_EXPORT struct razor_set *

   828 razor_transaction_finish(struct razor_transaction *trans)

   829 {

   830 	struct razor_merger *merger;

   831 	struct razor_package *u, *uend, *upkgs, *s, *send, *spkgs;

   832 	char *upool, *spool;

   833 	int cmp;

   834 

   835 	s = trans->system.set->packages.data;

   836 	spkgs = trans->system.set->packages.data;

   837 	send = trans->system.set->packages.data +

   838 		trans->system.set->packages.size;

   839 	spool = trans->system.set->string_pool.data;

   840 

   841 	u = trans->upstream.set->packages.data;

   842 	upkgs = trans->upstream.set->packages.data;

   843 	uend = trans->upstream.set->packages.data +

   844 		trans->upstream.set->packages.size;

   845 	upool = trans->upstream.set->string_pool.data;

   846 

   847 	merger = razor_merger_create(trans->system.set, trans->upstream.set);

   848 	while (s < send || u < uend) {

   849 		if (s < send && u < uend)

   850 			cmp = strcmp(&spool[s->name], &upool[u->name]);

   851 		else if (s < send)

   852 			cmp = -1;

   853 		else

   854 			cmp = 1;

   855 

   856 		if (cmp < 0) {

   857 			if (trans->system.packages[s - spkgs] & TRANS_PACKAGE_PRESENT)

   858 				razor_merger_add_package(merger, s);

   859 			s++;

   860 		} else if (cmp == 0) {

   861 			if (trans->system.packages[s - spkgs] & TRANS_PACKAGE_PRESENT)

   862 				razor_merger_add_package(merger, s);

   863 			if (trans->upstream.packages[u - upkgs] & TRANS_PACKAGE_PRESENT)

   864 				razor_merger_add_package(merger, u);

   865 

   866 			s++;

   867 			u++;

   868 		} else {

   869 			if (trans->upstream.packages[u - upkgs] & TRANS_PACKAGE_PRESENT)

   870 				razor_merger_add_package(merger, u);

   871 			u++;

   872 		}

   873 	}

   874 

   875 	razor_transaction_destroy(trans);

   876 

   877 	return razor_merger_finish(merger);

   878 }

   879 

   880 RAZOR_EXPORT void

   881 razor_transaction_destroy(struct razor_transaction *trans)

   882 {

   883 	assert (trans != NULL);

   884 

   885 	transaction_set_release(&trans->system);

   886 	transaction_set_release(&trans->upstream);

   887 	free(trans);

   888 }
razor