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librazor/transaction.c
author J. Ali Harlow <ali@juiblex.co.uk>
Sat Aug 23 16:07:09 2014 +0100 (2014-08-23)
changeset 441 cf499fd51df7
parent 432 2d8fecb8f024
child 442 c4bcba8023a9
permissions -rw-r--r--
Drop drive letter from path to razor root when RAZOR_ROOT set.

If the RAZOR_ROOT environment variable was set to eg., /root then on
Microsoft Windows we were trying to use paths such as /rootC:/Programs
which is obviously wrong. Instead we should drop the drive letter
giving paths of the form /root/Programs. Note that the drive letter is
_not_ migrated to C:/root/Programs: If a root of C:/root was desired
then RAZOR_ROOT would have been set to C:/root. 
     1 /*

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

     3  * Copyright (C) 2008  Red Hat, Inc

     4  * Copyright (C) 2009, 2011, 2012  J. Ali Harlow <ali@juiblex.co.uk>

     5  *

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

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

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

     9  * (at your option) any later version.

    10  *

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

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

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

    14  * GNU General Public License for more details.

    15  *

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

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

    18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

    19  */

    20 

    21 #define _GNU_SOURCE

    22 

    23 #include "config.h"

    24 #include <stdlib.h>

    25 #include <stddef.h>

    26 #include <stdint.h>

    27 #include <stdio.h>

    28 #include <string.h>

    29 #include <sys/types.h>

    30 #include <sys/stat.h>

    31 #include <unistd.h>

    32 #include <fcntl.h>

    33 #include <errno.h>

    34 #include <ctype.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 	struct razor_merger *merger;

   105 };

   106 

   107 static void

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

   109 {

   110 	int count;

   111 

   112 	ts->set = razor_set_ref(set);

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

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

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

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

   117 }

   118 

   119 static void

   120 transaction_set_release(struct transaction_set *ts)

   121 {

   122 	razor_set_unref(ts->set);

   123 	free(ts->packages);

   124 	free(ts->properties);

   125 }

   126 

   127 static void

   128 transaction_set_install_package(struct transaction_set *ts,

   129 				struct razor_package *package)

   130 {

   131 	struct razor_package *pkgs;

   132 	struct list *prop;

   133 	int i;

   134 

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

   136 	i = package - pkgs;

   137 	if (ts->packages[i] & TRANS_PACKAGE_PRESENT)

   138 		return;

   139 

   140 	ts->packages[i] |= TRANS_PACKAGE_PRESENT;

   141 

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

   143 	while (prop) {

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

   145 		prop = list_next(prop);

   146 	}

   147 }

   148 

   149 static void

   150 transaction_set_remove_package(struct transaction_set *ts,

   151 			       struct razor_package *package)

   152 {

   153 	struct razor_package *pkgs;

   154 	struct list *prop;

   155 	int i;

   156 

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

   158 	i = package - pkgs;

   159 	if (!(ts->packages[i] & TRANS_PACKAGE_PRESENT))

   160 		return;

   161 

   162 	ts->packages[i] &= ~TRANS_PACKAGE_PRESENT;

   163 

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

   165 	while (prop) {

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

   167 		prop = list_next(prop);

   168 	}

   169 }

   170 

   171 RAZOR_EXPORT struct razor_transaction *

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

   173 {

   174 	struct razor_transaction *trans;

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

   176 

   177 	trans = zalloc(sizeof *trans);

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

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

   180 

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

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

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

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

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

   186 

   187 	return trans;

   188 }

   189 

   190 RAZOR_EXPORT void

   191 razor_transaction_install_package(struct razor_transaction *trans,

   192 				  struct razor_package *package)

   193 {

   194 	assert (trans != NULL);

   195 	assert (package != NULL);

   196 

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

   198 	trans->changes++;

   199 }

   200 

   201 RAZOR_EXPORT void

   202 razor_transaction_remove_package(struct razor_transaction *trans,

   203 				 struct razor_package *package)

   204 {

   205 	assert (trans != NULL);

   206 	assert (package != NULL);

   207 

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

   209 	trans->changes++;

   210 }

   211 

   212 RAZOR_EXPORT void

   213 razor_transaction_update_package(struct razor_transaction *trans,

   214 				  struct razor_package *package)

   215 {

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

   217 

   218 	assert (trans != NULL);

   219 	assert (package != NULL);

   220 

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

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

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

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

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

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

   227 	else

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

   229 }

   230 

   231 struct prop_iter {

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

   233 	const char *pool;

   234 	uint32_t *present;

   235 };

   236 

   237 static void

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

   239 {

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

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

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

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

   244 	pi->present = ts->properties;

   245 }

   246 

   247 static int

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

   249 {

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

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

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

   253 			*p = pi->p++;

   254 			return 1;

   255 		}

   256 		pi->p++;

   257 	}

   258 

   259 	return 0;

   260 }

   261 

   262 static struct razor_property *

   263 prop_iter_seek_to(struct prop_iter *pi,

   264 		  uint32_t flags, const char *match)

   265 {

   266 	uint32_t name;

   267 

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

   269 		pi->p++;

   270 

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

   272 		return NULL;

   273 

   274 	name = pi->p->name;

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

   276 	       pi->p->name == name &&

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

   278 		pi->p++;

   279 

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

   281 		return NULL;

   282 

   283 	return pi->p;

   284 }

   285 

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

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

   288  * requirement that rpi points to. */

   289 static void

   290 remove_matching_providers(struct razor_transaction *trans,

   291 			  struct prop_iter *ppi,

   292 			  uint32_t flags,

   293 			  const char *version)

   294 {

   295 	struct razor_property *p;

   296 	struct razor_package *pkg, *pkgs;

   297 	struct razor_package_iterator pkg_iter;

   298 	struct razor_set *set;

   299 	const char *n, *v;

   300 	uint32_t type;

   301 

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

   303 		set = trans->system.set;

   304 	else

   305 		set = trans->upstream.set;

   306 

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

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

   309 	for (p = ppi->p;

   310 	     p < ppi->end &&

   311 	     p->name == ppi->p->name &&

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

   313 	     p++) {

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

   315 			continue;

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

   317 						    flags, version))

   318 			continue;

   319 

   320 		razor_package_iterator_init_for_property(&pkg_iter, set, p);

   321 		while (razor_package_iterator_next(&pkg_iter, &pkg,

   322 						   RAZOR_DETAIL_NAME, &n,

   323 						   RAZOR_DETAIL_VERSION, &v,

   324 						   RAZOR_DETAIL_LAST)) {

   325 #if 0

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

   327 #endif

   328 			razor_transaction_remove_package(trans, pkg);

   329 		}

   330 	}

   331 }

   332 

   333 static void

   334 flag_matching_providers(struct razor_transaction *trans,

   335 			struct prop_iter *ppi,

   336 			struct razor_property *r,

   337 			struct prop_iter *rpi,

   338 			unsigned int flag)

   339 {

   340 	struct razor_property *p;

   341 	struct razor_package *pkg, *pkgs;

   342 	struct razor_package_iterator pkg_iter;

   343 	struct razor_set *set;

   344 	const char *name, *version;

   345 	uint32_t *flags, type;

   346 

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

   348 		set = trans->system.set;

   349 		flags = trans->system.packages;

   350 	} else {

   351 		set = trans->upstream.set;

   352 		flags = trans->upstream.packages;

   353 	}

   354 

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

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

   357 	for (p = ppi->p;

   358 	     p < ppi->end &&

   359 		     p->name == ppi->p->name &&

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

   361 	     p++) {

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

   363 			continue;

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

   365 						    r->flags,

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

   367 			continue;

   368 

   369 		razor_package_iterator_init_for_property(&pkg_iter, set, p);

   370 		while (razor_package_iterator_next(&pkg_iter, &pkg,

   371 						   RAZOR_DETAIL_NAME, &name,

   372 						   RAZOR_DETAIL_VERSION, &version,

   373 						   RAZOR_DETAIL_LAST)) {

   374 

   375 #if 0

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

   377 				name, version,

   378 				ppi->pool + p->name,

   379 				rpi->pool + r->name,

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

   381 #endif

   382 			flags[pkg - pkgs] |= flag;

   383 		}

   384 	}

   385 }

   386 

   387 static struct razor_package *

   388 pick_matching_provider(struct razor_set *set,

   389 		       struct prop_iter *ppi,

   390 		       uint32_t flags,

   391 		       const char *version)

   392 {

   393 	struct razor_property *p;

   394 	struct razor_package *pkgs;

   395 	struct list *i;

   396 	uint32_t type;

   397 

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

   399 	 * requirement.  There may be several different providers

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

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

   402 	 * from the first provider that matches. */

   403 

   404 	pkgs = set->packages.data;

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

   406 	for (p = ppi->p;

   407 	     p < ppi->end &&

   408 		     p->name == ppi->p->name &&

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

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

   411 	     p++) {

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

   413 						    flags, version))

   414 			continue;

   415 

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

   417 

   418 		return &pkgs[i->data];

   419 	}

   420 

   421 	return NULL;

   422 }

   423 

   424 static void

   425 remove_obsoleted_packages(struct razor_transaction *trans)

   426 {

   427 	struct razor_property *up;

   428 	struct razor_package *spkgs;

   429 	struct prop_iter spi, upi;

   430 

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

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

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

   434 

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

   436 		if (!prop_iter_seek_to(&spi, RAZOR_PROPERTY_PROVIDES,

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

   438 			continue;

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

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

   441 	}

   442 }

   443 

   444 static int

   445 any_provider_satisfies_requirement(struct prop_iter *ppi,

   446 				   uint32_t flags,

   447 				   const char *version)

   448 {

   449 	struct razor_property *p;

   450 	uint32_t type;

   451 

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

   453 	for (p = ppi->p;

   454 	     p < ppi->end &&

   455 		     p->name == ppi->p->name &&

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

   457 	     p++) {

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

   459 		    provider_satisfies_requirement(p, ppi->pool,

   460 						   flags, version))

   461 			return 1;

   462 	}

   463 

   464 	return 0;

   465 }

   466 

   467 static void

   468 clear_requires_flags(struct transaction_set *ts)

   469 {

   470 	struct razor_property *p;

   471 	const char *pool;

   472 	int i, count;

   473 	char *sub;

   474 

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

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

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

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

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

   480 		sub = strchr(&pool[p[i].name], '(');

   481 		if (sub && sub[strlen(sub) - 1] == ')') {

   482 			sub = strdup(sub + 1);

   483 			sub[strlen(sub) - 1] = '\0';

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

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

   486 			if (strncmp(&pool[p[i].name], "lua(", 4) == 0 &&

   487 			    razor_get_lua_loader(sub) &&

   488 			    p[i].flags & RAZOR_PROPERTY_SCRIPT_MASK)

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

   490 			free(sub);

   491 		}

   492 	}

   493 }

   494 

   495 static void

   496 mark_satisfied_requires(struct razor_transaction *trans,

   497 			struct transaction_set *rts,

   498 			struct transaction_set *pts)

   499 {

   500 	struct prop_iter rpi, ppi;

   501 	struct razor_property *rp;

   502 

   503 	prop_iter_init(&rpi, rts);

   504 	prop_iter_init(&ppi, pts);

   505 

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

   507 		if (!prop_iter_seek_to(&ppi, RAZOR_PROPERTY_PROVIDES,

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

   509 			continue;

   510 

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

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

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

   514 	}

   515 }

   516 

   517 static void

   518 mark_all_satisfied_requires(struct razor_transaction *trans)

   519 {

   520 	clear_requires_flags(&trans->system);

   521 	clear_requires_flags(&trans->upstream);

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

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

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

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

   526 }

   527 

   528 static void

   529 update_unsatisfied_packages(struct razor_transaction *trans)

   530 {

   531 	struct razor_package *spkgs, *pkg;

   532 	struct razor_property *sp;

   533 	struct prop_iter spi;

   534 	struct razor_package_iterator pkg_iter;

   535 	const char *name;

   536 

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

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

   539 

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

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

   542 			continue;

   543 

   544 		razor_package_iterator_init_for_property(&pkg_iter,

   545 							 trans->system.set,

   546 							 sp);

   547 		while (razor_package_iterator_next(&pkg_iter, &pkg,

   548 						   RAZOR_DETAIL_NAME, &name,

   549 						   RAZOR_DETAIL_LAST)) {

   550 			if (!(trans->system.packages[pkg - spkgs] & TRANS_PACKAGE_PRESENT))

   551 				continue;

   552 

   553 #if 0

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

   555 				"isn't satisfied\n",

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

   557 				razor_property_relation_to_string(sp),

   558 				spi.pool + sp->version);

   559 #endif

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

   561 				TRANS_PACKAGE_UPDATE;

   562 		}

   563 	}

   564 }

   565 

   566 RAZOR_EXPORT void

   567 razor_transaction_update_all(struct razor_transaction *trans)

   568 {

   569 	struct razor_package *p;

   570 	int i, count;

   571 

   572 	assert (trans != NULL);

   573 

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

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

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

   577 }

   578 

   579 static void

   580 update_conflicted_packages(struct razor_transaction *trans)

   581 {

   582 	struct razor_package *pkg, *spkgs;

   583 	struct razor_property *up, *sp;

   584 	struct prop_iter spi, upi;

   585 	struct razor_package_iterator pkg_iter;

   586 	const char *name, *version;

   587 

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

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

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

   591 

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

   593 		if (!prop_iter_seek_to(&upi, RAZOR_PROPERTY_PROVIDES,

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

   595 			continue;

   596 

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

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

   599 			continue;

   600 

   601 		razor_package_iterator_init_for_property(&pkg_iter,

   602 							 trans->system.set,

   603 							 sp);

   604 		while (razor_package_iterator_next(&pkg_iter, &pkg,

   605 						   RAZOR_DETAIL_NAME, &name,

   606 						   RAZOR_DETAIL_VERSION, &version,

   607 						   RAZOR_DETAIL_LAST)) {

   608 #if 0

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

   610 				"conflicts with %s\n",

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

   612 #endif

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

   614 				TRANS_PACKAGE_UPDATE;

   615 		}

   616 	}

   617 

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

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

   620 

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

   622 		sp = prop_iter_seek_to(&spi, RAZOR_PROPERTY_PROVIDES,

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

   624 

   625 		if (sp)

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

   627 						TRANS_PACKAGE_UPDATE);

   628 	}

   629 }

   630 

   631 static void

   632 pull_in_requirements(struct razor_transaction *trans,

   633 		     struct prop_iter *rpi, struct prop_iter *ppi)

   634 {

   635 	struct razor_property *rp, *pp;

   636 	struct razor_package *pkg, *upkgs;

   637 

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

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

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

   641 			continue;

   642 

   643 		pp = prop_iter_seek_to(ppi, RAZOR_PROPERTY_PROVIDES,

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

   645 		if (pp == NULL)

   646 			continue;

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

   648 					     ppi, rp->flags,

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

   650 		if (pkg == NULL)

   651 			continue;

   652 

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

   654 

   655 #if 0

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

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

   658 			ppi->pool + pkg->name,

   659 			ppi->pool + pkg->version,

   660 			ppi->pool + pkg->arch,

   661 			ppi->pool + pp->name,

   662 			razor_property_relation_to_string(pp),

   663 			ppi->pool + pp->version,

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

   665 			razor_property_relation_to_string(rp),

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

   667 #endif

   668 

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

   670 	}

   671 }

   672 

   673 static void

   674 pull_in_all_requirements(struct razor_transaction *trans)

   675 {

   676 	struct prop_iter rpi, ppi;

   677 

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

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

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

   681 

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

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

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

   685 }

   686 

   687 static void

   688 flush_scheduled_system_updates(struct razor_transaction *trans)

   689 {

   690  	struct razor_package_iterator *pi;

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

   692 	struct prop_iter ppi;

   693 	const char *name, *version;

   694 

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

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

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

   698 

   699 	while (razor_package_iterator_next(pi, &p,

   700 					   RAZOR_DETAIL_NAME, &name,

   701 					   RAZOR_DETAIL_VERSION, &version,

   702 					   RAZOR_DETAIL_LAST)) {

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

   704 			continue;

   705 		trans->system.packages[p - spkgs] &= ~TRANS_PACKAGE_UPDATE;

   706 

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

   708 			continue;

   709 

   710 		if (any_provider_satisfies_requirement(&ppi,

   711 						       RAZOR_PROPERTY_GREATER,

   712 						       version)) {

   713 			razor_transaction_remove_package(trans, p);

   714 			continue;

   715 		}

   716 

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

   718 					     RAZOR_PROPERTY_GREATER, version);

   719 		if (pkg == NULL)

   720 			continue;

   721 

   722 		razor_transaction_remove_package(trans, p);

   723 		razor_transaction_install_package(trans, pkg);

   724 	}

   725 

   726 	razor_package_iterator_destroy(pi);

   727 }

   728 

   729 static void

   730 flush_scheduled_upstream_updates(struct razor_transaction *trans)

   731 {

   732  	struct razor_package_iterator *pi;

   733  	struct razor_package *p, *upkgs;

   734 	struct prop_iter spi;

   735 	const char *name, *version;

   736 

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

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

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

   740 

   741 	while (razor_package_iterator_next(pi, &p,

   742 					   RAZOR_DETAIL_NAME, &name,

   743 					   RAZOR_DETAIL_VERSION, &version,

   744 					   RAZOR_DETAIL_LAST)) {

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

   746 			continue;

   747 		trans->upstream.packages[p - upkgs] &= ~TRANS_PACKAGE_UPDATE;

   748 

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

   750 			remove_matching_providers(trans,

   751 						  &spi,

   752 						  RAZOR_PROPERTY_LESS,

   753 						  version);

   754 		razor_transaction_install_package(trans, p);

   755 #if 0

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

   757 #endif

   758 	}

   759 }

   760 

   761 RAZOR_EXPORT int

   762 razor_transaction_resolve(struct razor_transaction *trans)

   763 {

   764 	int last = 0;

   765 

   766 	flush_scheduled_system_updates(trans);

   767 	flush_scheduled_upstream_updates(trans);

   768 

   769 	while (last < trans->changes) {

   770 		last = trans->changes;

   771 		remove_obsoleted_packages(trans);

   772 		mark_all_satisfied_requires(trans);

   773 		update_unsatisfied_packages(trans);

   774 		update_conflicted_packages(trans);

   775 		pull_in_all_requirements(trans);

   776 		flush_scheduled_system_updates(trans);

   777 		flush_scheduled_upstream_updates(trans);

   778 	}

   779 

   780 	return trans->changes;

   781 }

   782 

   783 static void

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

   785 {

   786 	struct razor_package_iterator pi;

   787 	struct razor_package *pkg;

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

   789 

   790 	pool = set->string_pool.data;

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

   792 		razor_package_iterator_init_for_property(&pi, set, rp);

   793 		while (razor_package_iterator_next(&pi, &pkg,

   794 						   RAZOR_DETAIL_NAME, &name,

   795 						   RAZOR_DETAIL_VERSION, &version,

   796 						   RAZOR_DETAIL_ARCH, &arch,

   797 						   RAZOR_DETAIL_LAST))

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

   799 				&pool[rp->name],

   800 				name, version, arch);

   801 	} else {

   802 		razor_package_iterator_init_for_property(&pi, set, rp);

   803 		while (razor_package_iterator_next(&pi, &pkg,

   804 						   RAZOR_DETAIL_NAME, &name,

   805 						   RAZOR_DETAIL_VERSION, &version,

   806 						   RAZOR_DETAIL_ARCH, &arch,

   807 						   RAZOR_DETAIL_LAST))

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

   809 				&pool[rp->name],

   810 				razor_property_relation_to_string(rp),

   811 				&pool[rp->version],

   812 				name, version, arch);

   813 	}

   814 }

   815 

   816 RAZOR_EXPORT int

   817 razor_transaction_describe(struct razor_transaction *trans)

   818 {

   819 	struct prop_iter rpi;

   820 	struct razor_property *rp;

   821 	int unsatisfied;

   822 

   823 	flush_scheduled_system_updates(trans);

   824 	flush_scheduled_upstream_updates(trans);

   825 	mark_all_satisfied_requires(trans);

   826 

   827 	unsatisfied = 0;

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

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

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

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

   832 		        unsatisfied++;

   833 		}

   834 	}

   835 

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

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

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

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

   840 			unsatisfied++;

   841 		}

   842 	}

   843 

   844 	return unsatisfied;

   845 }

   846 

   847 RAZOR_EXPORT int

   848 razor_transaction_unsatisfied_property(struct razor_transaction *trans,

   849 				       const char *name,

   850 				       uint32_t flags,

   851 				       const char *version)

   852 {

   853 	struct prop_iter pi;

   854 	struct razor_property *p;

   855 

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

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

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

   859 		    p->flags == flags &&

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

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

   862 

   863 			return 1;

   864 	}

   865 

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

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

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

   869 		    p->flags == flags &&

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

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

   872 

   873 			return 1;

   874 	}

   875 

   876 	return 0;

   877 }

   878 

   879 RAZOR_EXPORT struct razor_set *

   880 razor_transaction_commit(struct razor_transaction *trans)

   881 {

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

   883 	char *upool, *spool;

   884 	int cmp;

   885 

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

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

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

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

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

   891 

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

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

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

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

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

   897 

   898 	trans->merger = razor_merger_create(trans->system.set,

   899 					    trans->upstream.set);

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

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

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

   903 		else if (s < send)

   904 			cmp = -1;

   905 		else

   906 			cmp = 1;

   907 

   908 		if (cmp < 0) {

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

   910 				razor_merger_add_package(trans->merger, s);

   911 			s++;

   912 		} else if (cmp == 0) {

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

   914 				razor_merger_add_package(trans->merger, s);

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

   916 				razor_merger_add_package(trans->merger, u);

   917 

   918 			s++;

   919 			u++;

   920 		} else {

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

   922 				razor_merger_add_package(trans->merger, u);

   923 			u++;

   924 		}

   925 	}

   926 

   927 	return razor_merger_commit(trans->merger);

   928 }

   929 

   930 RAZOR_EXPORT void

   931 razor_transaction_fixup_package(struct razor_transaction *trans,

   932 				struct razor_package *package,

   933 				struct razor_rpm *rpm)

   934 {

   935 	const char *preunprog, *preun, *postunprog, *postun;

   936 

   937 	razor_rpm_get_details(rpm,

   938 			      RAZOR_DETAIL_PREUNPROG, &preunprog,

   939 			      RAZOR_DETAIL_PREUN, &preun,

   940 			      RAZOR_DETAIL_POSTUNPROG, &postunprog,

   941 			      RAZOR_DETAIL_POSTUN, &postun,

   942 			      RAZOR_DETAIL_LAST);

   943 

   944 	razor_merger_package_add_script(trans->merger, package,

   945 					RAZOR_PROPERTY_PREUN,

   946 					preunprog, preun);

   947 	razor_merger_package_add_script(trans->merger, package,

   948 					RAZOR_PROPERTY_POSTUN,

   949 					postunprog, postun);

   950 }

   951 

   952 RAZOR_EXPORT void

   953 razor_transaction_destroy(struct razor_transaction *trans)

   954 {

   955 	assert (trans != NULL);

   956 

   957 	if (trans->merger)

   958 		razor_merger_destroy(trans->merger);

   959 	transaction_set_release(&trans->system);

   960 	transaction_set_release(&trans->upstream);

   961 	free(trans);

   962 }
razor