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librazor/transaction.c
author J. Ali Harlow <ali@juiblex.co.uk>
Thu Jan 08 15:44:43 2009 +0000 (2009-01-08)
changeset 333 1829493b5fb9
parent 307 95b6bcadd6c4
child 368 ea743486ba6f
permissions -rw-r--r--
Remove another unnecessary include of sys/mman.h 
     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 <unistd.h>

    30 #include <fcntl.h>

    31 #include <errno.h>

    32 #include <ctype.h>

    33 #include <fnmatch.h>

    34 #include <assert.h>

    35 

    36 #include "razor-internal.h"

    37 #include "razor.h"

    38 

    39 static int

    40 provider_satisfies_requirement(struct razor_property *provider,

    41 			       const char *provider_strings,

    42 			       uint32_t flags,

    43 			       const char *required)

    44 {

    45 	int cmp, len;

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

    47 

    48 	if (!*required)

    49 		return 1;

    50 	if (!*provided) {

    51 		if (flags & RAZOR_PROPERTY_LESS)

    52 			return 0;

    53 		else

    54 			return 1;

    55 	}

    56 

    57 	cmp = razor_versioncmp(provided, required);

    58 

    59 	switch (flags & RAZOR_PROPERTY_RELATION_MASK) {

    60 	case RAZOR_PROPERTY_LESS:

    61 		return cmp < 0;

    62 

    63 	case RAZOR_PROPERTY_LESS | RAZOR_PROPERTY_EQUAL:

    64 		if (cmp <= 0)

    65 			return 1;

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

    67 

    68 	case RAZOR_PROPERTY_EQUAL:

    69 		if (cmp == 0)

    70 			return 1;

    71 

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

    73 		len = strlen(required);

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

    75 			return 1;

    76 		return 0;

    77 

    78 	case RAZOR_PROPERTY_GREATER | RAZOR_PROPERTY_EQUAL:

    79 		return cmp >= 0;

    80 

    81 	case RAZOR_PROPERTY_GREATER:

    82 		return cmp > 0;

    83 	}

    84 

    85 	/* shouldn't happen */

    86 	return 0;

    87 }

    88 

    89 #define TRANS_PACKAGE_PRESENT		1

    90 #define TRANS_PACKAGE_UPDATE		2

    91 #define TRANS_PROPERTY_SATISFIED	0x80000000

    92 

    93 struct transaction_set {

    94 	struct razor_set *set;

    95 	uint32_t *packages;

    96 	uint32_t *properties;

    97 };

    98 

    99 struct razor_transaction {

   100 	int package_count, errors;

   101 	struct transaction_set system, upstream;

   102 	int changes;

   103 };

   104 

   105 static void

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

   107 {

   108 	int count;

   109 

   110 	ts->set = set;

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

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

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

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

   115 }

   116 

   117 static void

   118 transaction_set_release(struct transaction_set *ts)

   119 {

   120 	free(ts->packages);

   121 	free(ts->properties);

   122 }

   123 

   124 static void

   125 transaction_set_install_package(struct transaction_set *ts,

   126 				struct razor_package *package)

   127 {

   128 	struct razor_package *pkgs;

   129 	struct list *prop;

   130 	int i;

   131 

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

   133 	i = package - pkgs;

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

   135 		return;

   136 

   137 	ts->packages[i] = TRANS_PACKAGE_PRESENT;

   138 

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

   140 	while (prop) {

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

   142 		prop = list_next(prop);

   143 	}

   144 }

   145 

   146 static void

   147 transaction_set_remove_package(struct transaction_set *ts,

   148 			       struct razor_package *package)

   149 {

   150 	struct razor_package *pkgs;

   151 	struct list *prop;

   152 	int i;

   153 

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

   155 	i = package - pkgs;

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

   157 		return;

   158 

   159 	ts->packages[i] = 0;

   160 

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

   162 	while (prop) {

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

   164 		prop = list_next(prop);

   165 	}

   166 }

   167 

   168 RAZOR_EXPORT struct razor_transaction *

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

   170 {

   171 	struct razor_transaction *trans;

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

   173 

   174 	trans = zalloc(sizeof *trans);

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

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

   177 

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

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

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

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

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

   183 

   184 	return trans;

   185 }

   186 

   187 RAZOR_EXPORT void

   188 razor_transaction_install_package(struct razor_transaction *trans,

   189 				  struct razor_package *package)

   190 {

   191 	assert (trans != NULL);

   192 	assert (package != NULL);

   193 

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

   195 	trans->changes++;

   196 }

   197 

   198 RAZOR_EXPORT void

   199 razor_transaction_remove_package(struct razor_transaction *trans,

   200 				 struct razor_package *package)

   201 {

   202 	assert (trans != NULL);

   203 	assert (package != NULL);

   204 

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

   206 	trans->changes++;

   207 }

   208 

   209 RAZOR_EXPORT void

   210 razor_transaction_update_package(struct razor_transaction *trans,

   211 				  struct razor_package *package)

   212 {

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

   214 

   215 	assert (trans != NULL);

   216 	assert (package != NULL);

   217 

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

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

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

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

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

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

   224 	else

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

   226 }

   227 

   228 struct prop_iter {

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

   230 	const char *pool;

   231 	uint32_t *present;

   232 };

   233 

   234 static void

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

   236 {

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

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

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

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

   241 	pi->present = ts->properties;

   242 }

   243 

   244 static int

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

   246 {

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

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

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

   250 			*p = pi->p++;

   251 			return 1;

   252 		}

   253 		pi->p++;

   254 	}

   255 

   256 	return 0;

   257 }

   258 

   259 static struct razor_property *

   260 prop_iter_seek_to(struct prop_iter *pi,

   261 		  uint32_t flags, const char *match)

   262 {

   263 	uint32_t name;

   264 

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

   266 		pi->p++;

   267 

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

   269 		return NULL;

   270 

   271 	name = pi->p->name;

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

   273 	       pi->p->name == name &&

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

   275 		pi->p++;

   276 

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

   278 		return NULL;

   279 

   280 	return pi->p;

   281 }

   282 

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

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

   285  * requirement that rpi points to. */

   286 static void

   287 remove_matching_providers(struct razor_transaction *trans,

   288 			  struct prop_iter *ppi,

   289 			  uint32_t flags,

   290 			  const char *version)

   291 {

   292 	struct razor_property *p;

   293 	struct razor_package *pkg, *pkgs;

   294 	struct razor_package_iterator pkg_iter;

   295 	struct razor_set *set;

   296 	const char *n, *v;

   297 	uint32_t type;

   298 

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

   300 		set = trans->system.set;

   301 	else

   302 		set = trans->upstream.set;

   303 

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

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

   306 	for (p = ppi->p;

   307 	     p < ppi->end &&

   308 	     p->name == ppi->p->name &&

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

   310 	     p++) {

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

   312 			continue;

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

   314 						    flags, version))

   315 			continue;

   316 

   317 		razor_package_iterator_init_for_property(&pkg_iter, set, p);

   318 		while (razor_package_iterator_next(&pkg_iter, &pkg,

   319 						   RAZOR_DETAIL_NAME, &n,

   320 						   RAZOR_DETAIL_VERSION, &v,

   321 						   RAZOR_DETAIL_LAST)) {

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

   323 			razor_transaction_remove_package(trans, pkg);

   324 		}

   325 	}

   326 }

   327 

   328 static void

   329 flag_matching_providers(struct razor_transaction *trans,

   330 			struct prop_iter *ppi,

   331 			struct razor_property *r,

   332 			struct prop_iter *rpi,

   333 			unsigned int flag)

   334 {

   335 	struct razor_property *p;

   336 	struct razor_package *pkg, *pkgs;

   337 	struct razor_package_iterator pkg_iter;

   338 	struct razor_set *set;

   339 	const char *name, *version;

   340 	uint32_t *flags, type;

   341 

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

   343 		set = trans->system.set;

   344 		flags = trans->system.packages;

   345 	} else {

   346 		set = trans->upstream.set;

   347 		flags = trans->upstream.packages;

   348 	}

   349 

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

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

   352 	for (p = ppi->p;

   353 	     p < ppi->end &&

   354 		     p->name == ppi->p->name &&

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

   356 	     p++) {

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

   358 			continue;

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

   360 						    r->flags,

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

   362 			continue;

   363 

   364 		razor_package_iterator_init_for_property(&pkg_iter, set, p);

   365 		while (razor_package_iterator_next(&pkg_iter, &pkg,

   366 						   RAZOR_DETAIL_NAME, &name,

   367 						   RAZOR_DETAIL_VERSION, &version,

   368 						   RAZOR_DETAIL_LAST)) {

   369 

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

   371 				name, version,

   372 				ppi->pool + p->name,

   373 				rpi->pool + r->name,

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

   375 			flags[pkg - pkgs] |= flag;

   376 		}

   377 	}

   378 }

   379 

   380 static struct razor_package *

   381 pick_matching_provider(struct razor_set *set,

   382 		       struct prop_iter *ppi,

   383 		       uint32_t flags,

   384 		       const char *version)

   385 {

   386 	struct razor_property *p;

   387 	struct razor_package *pkgs;

   388 	struct list *i;

   389 	uint32_t type;

   390 

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

   392 	 * requirement.  There may be several different providers

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

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

   395 	 * from the first provider that matches. */

   396 

   397 	pkgs = set->packages.data;

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

   399 	for (p = ppi->p;

   400 	     p < ppi->end &&

   401 		     p->name == ppi->p->name &&

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

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

   404 	     p++) {

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

   406 						    flags, version))

   407 			continue;

   408 

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

   410 

   411 		return &pkgs[i->data];

   412 	}

   413 

   414 	return NULL;

   415 }

   416 

   417 static void

   418 remove_obsoleted_packages(struct razor_transaction *trans)

   419 {

   420 	struct razor_property *up;

   421 	struct razor_package *spkgs;

   422 	struct prop_iter spi, upi;

   423 

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

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

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

   427 

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

   429 		if (!prop_iter_seek_to(&spi, RAZOR_PROPERTY_PROVIDES,

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

   431 			continue;

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

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

   434 	}

   435 }

   436 

   437 static int

   438 any_provider_satisfies_requirement(struct prop_iter *ppi,

   439 				   uint32_t flags,

   440 				   const char *version)

   441 {

   442 	struct razor_property *p;

   443 	uint32_t type;

   444 

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

   446 	for (p = ppi->p;

   447 	     p < ppi->end &&

   448 		     p->name == ppi->p->name &&

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

   450 	     p++) {

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

   452 		    provider_satisfies_requirement(p, ppi->pool,

   453 						   flags, version))

   454 			return 1;

   455 	}

   456 

   457 	return 0;

   458 }

   459 

   460 static void

   461 clear_requires_flags(struct transaction_set *ts)

   462 {

   463 	struct razor_property *p;

   464 	const char *pool;

   465 	int i, count;

   466 

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

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

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

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

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

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

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

   474 	}

   475 }

   476 

   477 static void

   478 mark_satisfied_requires(struct razor_transaction *trans,

   479 			struct transaction_set *rts,

   480 			struct transaction_set *pts)

   481 {

   482 	struct prop_iter rpi, ppi;

   483 	struct razor_property *rp;

   484 

   485 	prop_iter_init(&rpi, rts);

   486 	prop_iter_init(&ppi, pts);

   487 

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

   489 		if (!prop_iter_seek_to(&ppi, RAZOR_PROPERTY_PROVIDES,

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

   491 			continue;

   492 

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

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

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

   496 	}

   497 }

   498 

   499 static void

   500 mark_all_satisfied_requires(struct razor_transaction *trans)

   501 {

   502 	clear_requires_flags(&trans->system);

   503 	clear_requires_flags(&trans->upstream);

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

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

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

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

   508 }

   509 

   510 static void

   511 update_unsatisfied_packages(struct razor_transaction *trans)

   512 {

   513 	struct razor_package *spkgs, *pkg;

   514 	struct razor_property *sp;

   515 	struct prop_iter spi;

   516 	struct razor_package_iterator pkg_iter;

   517 	const char *name;

   518 

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

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

   521 

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

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

   524 			continue;

   525 

   526 		razor_package_iterator_init_for_property(&pkg_iter,

   527 							 trans->system.set,

   528 							 sp);

   529 		while (razor_package_iterator_next(&pkg_iter, &pkg,

   530 						   RAZOR_DETAIL_NAME, &name,

   531 						   RAZOR_DETAIL_LAST)) {

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

   533 				"isn't satisfied\n",

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

   535 				razor_property_relation_to_string(sp),

   536 				spi.pool + sp->version);

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

   538 				TRANS_PACKAGE_UPDATE;

   539 		}

   540 	}

   541 }

   542 

   543 RAZOR_EXPORT void

   544 razor_transaction_update_all(struct razor_transaction *trans)

   545 {

   546 	struct razor_package *p;

   547 	int i, count;

   548 

   549 	assert (trans != NULL);

   550 

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

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

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

   554 }

   555 

   556 static void

   557 update_conflicted_packages(struct razor_transaction *trans)

   558 {

   559 	struct razor_package *pkg, *spkgs;

   560 	struct razor_property *up, *sp;

   561 	struct prop_iter spi, upi;

   562 	struct razor_package_iterator pkg_iter;

   563 	const char *name, *version;

   564 

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

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

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

   568 

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

   570 		if (!prop_iter_seek_to(&upi, RAZOR_PROPERTY_PROVIDES,

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

   572 			continue;

   573 

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

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

   576 			continue;

   577 

   578 		razor_package_iterator_init_for_property(&pkg_iter,

   579 							 trans->system.set,

   580 							 sp);

   581 		while (razor_package_iterator_next(&pkg_iter, &pkg,

   582 						   RAZOR_DETAIL_NAME, &name,

   583 						   RAZOR_DETAIL_VERSION, &version,

   584 						   RAZOR_DETAIL_LAST)) {

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

   586 				"conflicts with %s\n",

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

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

   589 				TRANS_PACKAGE_UPDATE;

   590 		}

   591 	}

   592 

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

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

   595 

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

   597 		sp = prop_iter_seek_to(&spi, RAZOR_PROPERTY_PROVIDES,

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

   599 

   600 		if (sp)

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

   602 						TRANS_PACKAGE_UPDATE);

   603 	}

   604 }

   605 

   606 static void

   607 pull_in_requirements(struct razor_transaction *trans,

   608 		     struct prop_iter *rpi, struct prop_iter *ppi)

   609 {

   610 	struct razor_property *rp, *pp;

   611 	struct razor_package *pkg, *upkgs;

   612 

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

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

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

   616 			continue;

   617 

   618 		pp = prop_iter_seek_to(ppi, RAZOR_PROPERTY_PROVIDES,

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

   620 		if (pp == NULL)

   621 			continue;

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

   623 					     ppi, rp->flags,

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

   625 		if (pkg == NULL)

   626 			continue;

   627 

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

   629 

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

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

   632 			ppi->pool + pkg->name,

   633 			ppi->pool + pkg->version,

   634 			ppi->pool + pkg->arch,

   635 			ppi->pool + pp->name,

   636 			razor_property_relation_to_string(pp),

   637 			ppi->pool + pp->version,

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

   639 			razor_property_relation_to_string(rp),

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

   641 

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

   643 	}

   644 }

   645 

   646 static void

   647 pull_in_all_requirements(struct razor_transaction *trans)

   648 {

   649 	struct prop_iter rpi, ppi;

   650 

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

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

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

   654 

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

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

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

   658 }

   659 

   660 static void

   661 flush_scheduled_system_updates(struct razor_transaction *trans)

   662 {

   663  	struct razor_package_iterator *pi;

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

   665 	struct prop_iter ppi;

   666 	const char *name, *version;

   667 

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

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

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

   671 

   672 	while (razor_package_iterator_next(pi, &p,

   673 					   RAZOR_DETAIL_NAME, &name,

   674 					   RAZOR_DETAIL_VERSION, &version,

   675 					   RAZOR_DETAIL_LAST)) {

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

   677 			continue;

   678 

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

   680 			continue;

   681 

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

   683 					     RAZOR_PROPERTY_GREATER, version);

   684 		if (pkg == NULL)

   685 			continue;

   686 

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

   688 			name, version,

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

   690 

   691 		razor_transaction_remove_package(trans, p);

   692 		razor_transaction_install_package(trans, pkg);

   693 	}

   694 

   695 	razor_package_iterator_destroy(pi);

   696 }

   697 

   698 static void

   699 flush_scheduled_upstream_updates(struct razor_transaction *trans)

   700 {

   701  	struct razor_package_iterator *pi;

   702  	struct razor_package *p, *upkgs;

   703 	struct prop_iter spi;

   704 	const char *name, *version;

   705 

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

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

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

   709 

   710 	while (razor_package_iterator_next(pi, &p,

   711 					   RAZOR_DETAIL_NAME, &name,

   712 					   RAZOR_DETAIL_VERSION, &version,

   713 					   RAZOR_DETAIL_LAST)) {

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

   715 			continue;

   716 

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

   718 			remove_matching_providers(trans,

   719 						  &spi,

   720 						  RAZOR_PROPERTY_LESS,

   721 						  version);

   722 		razor_transaction_install_package(trans, p);

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

   724 	}

   725 }

   726 

   727 RAZOR_EXPORT int

   728 razor_transaction_resolve(struct razor_transaction *trans)

   729 {

   730 	int last = 0;

   731 

   732 	flush_scheduled_system_updates(trans);

   733 	flush_scheduled_upstream_updates(trans);

   734 

   735 	while (last < trans->changes) {

   736 		last = trans->changes;

   737 		remove_obsoleted_packages(trans);

   738 		mark_all_satisfied_requires(trans);

   739 		update_unsatisfied_packages(trans);

   740 		update_conflicted_packages(trans);

   741 		pull_in_all_requirements(trans);

   742 		flush_scheduled_system_updates(trans);

   743 		flush_scheduled_upstream_updates(trans);

   744 	}

   745 

   746 	return trans->changes;

   747 }

   748 

   749 static void

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

   751 {

   752 	struct razor_package_iterator pi;

   753 	struct razor_package *pkg;

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

   755 

   756 	pool = set->string_pool.data;

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

   758 		razor_package_iterator_init_for_property(&pi, set, rp);

   759 		while (razor_package_iterator_next(&pi, &pkg,

   760 						   RAZOR_DETAIL_NAME, &name,

   761 						   RAZOR_DETAIL_VERSION, &version,

   762 						   RAZOR_DETAIL_ARCH, &arch,

   763 						   RAZOR_DETAIL_LAST))

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

   765 				&pool[rp->name],

   766 				name, version, arch);

   767 	} else {

   768 		razor_package_iterator_init_for_property(&pi, set, rp);

   769 		while (razor_package_iterator_next(&pi, &pkg,

   770 						   RAZOR_DETAIL_NAME, &name,

   771 						   RAZOR_DETAIL_VERSION, &version,

   772 						   RAZOR_DETAIL_ARCH, &arch,

   773 						   RAZOR_DETAIL_LAST))

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

   775 				&pool[rp->name],

   776 				razor_property_relation_to_string(rp),

   777 				&pool[rp->version],

   778 				name, version, arch);

   779 	}

   780 }

   781 

   782 RAZOR_EXPORT int

   783 razor_transaction_describe(struct razor_transaction *trans)

   784 {

   785 	struct prop_iter rpi;

   786 	struct razor_property *rp;

   787 	int unsatisfied;

   788 

   789 	flush_scheduled_system_updates(trans);

   790 	flush_scheduled_upstream_updates(trans);

   791 	mark_all_satisfied_requires(trans);

   792 

   793 	unsatisfied = 0;

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

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

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

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

   798 		        unsatisfied++;

   799 		}

   800 	}

   801 

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

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

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

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

   806 			unsatisfied++;

   807 		}

   808 	}

   809 

   810 	return unsatisfied;

   811 }

   812 

   813 RAZOR_EXPORT int

   814 razor_transaction_unsatisfied_property(struct razor_transaction *trans,

   815 				       const char *name,

   816 				       uint32_t flags,

   817 				       const char *version)

   818 {

   819 	struct prop_iter pi;

   820 	struct razor_property *p;

   821 

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

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

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

   825 		    p->flags == flags &&

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

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

   828 

   829 			return 1;

   830 	}

   831 

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

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

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

   835 		    p->flags == flags &&

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

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

   838 

   839 			return 1;

   840 	}

   841 

   842 	return 0;

   843 }

   844 

   845 RAZOR_EXPORT struct razor_set *

   846 razor_transaction_finish(struct razor_transaction *trans)

   847 {

   848 	struct razor_merger *merger;

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

   850 	char *upool, *spool;

   851 	int cmp;

   852 

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

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

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

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

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

   858 

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

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

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

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

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

   864 

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

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

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

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

   869 		else if (s < send)

   870 			cmp = -1;

   871 		else

   872 			cmp = 1;

   873 

   874 		if (cmp < 0) {

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

   876 				razor_merger_add_package(merger, s);

   877 			s++;

   878 		} else if (cmp == 0) {

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

   880 				razor_merger_add_package(merger, s);

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

   882 				razor_merger_add_package(merger, u);

   883 

   884 			s++;

   885 			u++;

   886 		} else {

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

   888 				razor_merger_add_package(merger, u);

   889 			u++;

   890 		}

   891 	}

   892 

   893 	razor_transaction_destroy(trans);

   894 

   895 	return razor_merger_finish(merger);

   896 }

   897 

   898 RAZOR_EXPORT void

   899 razor_transaction_destroy(struct razor_transaction *trans)

   900 {

   901 	assert (trans != NULL);

   902 

   903 	transaction_set_release(&trans->system);

   904 	transaction_set_release(&trans->upstream);

   905 	free(trans);

   906 }
razor