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src/import-yum.c
author Richard Hughes <richard@hughsie.com>
Mon Jun 30 09:47:32 2008 +0100 (2008-06-30)
changeset 303 2d450078e46e
parent 259 5b0601d184ed
child 333 1829493b5fb9
permissions -rw-r--r--
trivial: razor_property_iterator_create() can have package NULL and be valid 
     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 <string.h>

    23 #include <stdio.h>

    24 #include <stdint.h>

    25 #include <sys/stat.h>

    26 #include <sys/mman.h>

    27 #include <unistd.h>

    28 #include <fcntl.h>

    29 #include <errno.h>

    30 

    31 #include <expat.h>

    32 #include <zlib.h>

    33 #include "razor.h"

    34 

    35 /* Import a yum filelist as a razor package set. */

    36 

    37 enum {

    38 	YUM_STATE_BEGIN,

    39 	YUM_STATE_PACKAGE_NAME,

    40 	YUM_STATE_PACKAGE_ARCH,

    41 	YUM_STATE_SUMMARY,

    42 	YUM_STATE_DESCRIPTION,

    43 	YUM_STATE_URL,

    44 	YUM_STATE_LICENSE,

    45 	YUM_STATE_CHECKSUM,

    46 	YUM_STATE_REQUIRES,

    47 	YUM_STATE_PROVIDES,

    48 	YUM_STATE_OBSOLETES,

    49 	YUM_STATE_CONFLICTS,

    50 	YUM_STATE_FILE

    51 };

    52 

    53 struct yum_context {

    54 	XML_Parser primary_parser;

    55 	XML_Parser filelists_parser;

    56 	XML_Parser current_parser;

    57 

    58 	struct razor_importer *importer;

    59 	struct import_property_context *current_property_context;

    60 	char name[256], arch[64], summary[512], description[4096];

    61 	char url[256], license[64], buffer[512], *p;

    62 	char pkgid[128];

    63 	uint32_t property_type;

    64 	int state;

    65 

    66 	int total, current;

    67 };

    68 

    69 static uint32_t

    70 yum_to_razor_relation (const char *flags)

    71 {

    72 	if (flags[0] == 'L') {

    73 		if (flags[1] == 'T')

    74 			return RAZOR_PROPERTY_LESS;

    75 		else

    76 			return RAZOR_PROPERTY_LESS | RAZOR_PROPERTY_EQUAL;

    77 	} else if (flags[0] == 'G') {

    78 		if (flags[1] == 'T')

    79 			return RAZOR_PROPERTY_GREATER;

    80 		else

    81 			return RAZOR_PROPERTY_GREATER | RAZOR_PROPERTY_EQUAL;

    82 	} else

    83 		return RAZOR_PROPERTY_EQUAL;

    84 }

    85 

    86 static void

    87 yum_primary_start_element(void *data, const char *name, const char **atts)

    88 {

    89 	struct yum_context *ctx = data;

    90 	const char *n, *epoch, *version, *release;

    91 	char buffer[128];

    92 	uint32_t pre, relation, flags;

    93 	int i;

    94 

    95 	if (strcmp(name, "metadata") == 0) {

    96 		for (i = 0; atts[i]; i += 2) {

    97 			if (strcmp(atts[i], "packages") == 0)

    98 				ctx->total = atoi(atts[i + 1]);

    99 		}

   100 	} else if (strcmp(name, "name") == 0) {

   101 		ctx->state = YUM_STATE_PACKAGE_NAME;

   102 		ctx->p = ctx->name;

   103 	} else if (strcmp(name, "arch") == 0) {

   104 		ctx->state = YUM_STATE_PACKAGE_ARCH;

   105 		ctx->p = ctx->arch;

   106 	} else if (strcmp(name, "version") == 0) {

   107 		epoch = NULL;

   108 		version = NULL;

   109 		release = NULL;

   110 		for (i = 0; atts[i]; i += 2) {

   111 			if (strcmp(atts[i], "epoch") == 0)

   112 				epoch = atts[i + 1];

   113 			else if (strcmp(atts[i], "ver") == 0)

   114 				version = atts[i + 1];

   115 			else if (strcmp(atts[i], "rel") == 0)

   116 				release = atts[i + 1];

   117 		}

   118 		if (version == NULL || release == NULL) {

   119 			fprintf(stderr, "invalid version tag, "

   120 				"missing version or  release attribute\n");

   121 			return;

   122 		}

   123 

   124 		razor_build_evr(buffer, sizeof buffer, epoch, version, release);

   125 		razor_importer_begin_package(ctx->importer,

   126 					     ctx->name, buffer, ctx->arch);

   127 	} else if (strcmp(name, "summary") == 0) {

   128 		ctx->p = ctx->summary;

   129 		ctx->state = YUM_STATE_SUMMARY;

   130 	} else if (strcmp(name, "description") == 0) {

   131 		ctx->p = ctx->description;

   132 		ctx->state = YUM_STATE_DESCRIPTION;

   133 	} else if (strcmp(name, "url") == 0) {

   134 		ctx->p = ctx->url;

   135 		ctx->state = YUM_STATE_URL;

   136 	} else if (strcmp(name, "checksum") == 0) {

   137 		ctx->p = ctx->pkgid;

   138 		ctx->state = YUM_STATE_CHECKSUM;

   139 	} else if (strcmp(name, "rpm:license") == 0) {

   140 		ctx->p = ctx->license;

   141 		ctx->state = YUM_STATE_LICENSE;

   142 	} else if (strcmp(name, "rpm:requires") == 0) {

   143 		ctx->state = YUM_STATE_REQUIRES;

   144 		ctx->property_type = RAZOR_PROPERTY_REQUIRES;

   145 	} else if (strcmp(name, "rpm:provides") == 0) {

   146 		ctx->state = YUM_STATE_PROVIDES;

   147 		ctx->property_type = RAZOR_PROPERTY_PROVIDES;

   148 	} else if (strcmp(name, "rpm:obsoletes") == 0) {

   149 		ctx->state = YUM_STATE_OBSOLETES;

   150 		ctx->property_type = RAZOR_PROPERTY_OBSOLETES;

   151 	} else if (strcmp(name, "rpm:conflicts") == 0) {

   152 		ctx->state = YUM_STATE_CONFLICTS;

   153 		ctx->property_type = RAZOR_PROPERTY_CONFLICTS;

   154 	} else if (strcmp(name, "rpm:entry") == 0 &&

   155 		   ctx->state != YUM_STATE_BEGIN) {

   156 		n = NULL;

   157 		epoch = NULL;

   158 		version = NULL;

   159 		release = NULL;

   160 		relation = RAZOR_PROPERTY_EQUAL;

   161 		pre = 0;

   162 		for (i = 0; atts[i]; i += 2) {

   163 			if (strcmp(atts[i], "name") == 0)

   164 				n = atts[i + 1];

   165 			else if (strcmp(atts[i], "epoch") == 0)

   166 				epoch = atts[i + 1];

   167 			else if (strcmp(atts[i], "ver") == 0)

   168 				version = atts[i + 1];

   169 			else if (strcmp(atts[i], "rel") == 0)

   170 				release = atts[i + 1];

   171 			else if (strcmp(atts[i], "flags") == 0)

   172 				relation = yum_to_razor_relation(atts[i + 1]);

   173 			else if (strcmp(atts[i], "pre") == 0)

   174 				pre = 

   175 					RAZOR_PROPERTY_PRE |

   176 					RAZOR_PROPERTY_POST |

   177 					RAZOR_PROPERTY_PREUN |

   178 					RAZOR_PROPERTY_POSTUN;

   179 		}

   180 

   181 		if (n == NULL) {

   182 			fprintf(stderr, "invalid rpm:entry, "

   183 				"missing name or version attributes\n");

   184 			return;

   185 		}

   186 

   187 		razor_build_evr(buffer, sizeof buffer, epoch, version, release);

   188 		flags = ctx->property_type | relation | pre;

   189 		razor_importer_add_property(ctx->importer, n, flags, buffer);

   190 	}

   191 }

   192 

   193 static void

   194 yum_primary_end_element (void *data, const char *name)

   195 {

   196 	struct yum_context *ctx = data;

   197 

   198 	switch (ctx->state) {

   199 	case YUM_STATE_PACKAGE_NAME:

   200 	case YUM_STATE_PACKAGE_ARCH:

   201 	case YUM_STATE_SUMMARY:

   202 	case YUM_STATE_DESCRIPTION:

   203 	case YUM_STATE_URL:

   204 	case YUM_STATE_LICENSE:

   205 	case YUM_STATE_CHECKSUM:

   206 	case YUM_STATE_FILE:

   207 		ctx->state = YUM_STATE_BEGIN;

   208 		break;

   209 	}

   210 

   211 	if (strcmp(name, "package") == 0) {

   212 		razor_importer_add_details(ctx->importer, ctx->summary,

   213 					   ctx->description, ctx->url,

   214 					   ctx->license);

   215 

   216 		XML_StopParser(ctx->current_parser, XML_TRUE);

   217 		ctx->current_parser = ctx->filelists_parser;

   218 

   219 		printf("\rimporting %d/%d", ++ctx->current, ctx->total);

   220 		fflush(stdout);

   221 	}

   222 }

   223 

   224 static void

   225 yum_character_data (void *data, const XML_Char *s, int len)

   226 {

   227 	struct yum_context *ctx = data;

   228 

   229 	switch (ctx->state) {

   230 	case YUM_STATE_PACKAGE_NAME:

   231 	case YUM_STATE_PACKAGE_ARCH:

   232 	case YUM_STATE_SUMMARY:

   233 	case YUM_STATE_DESCRIPTION:

   234 	case YUM_STATE_URL:

   235 	case YUM_STATE_LICENSE:

   236 	case YUM_STATE_CHECKSUM:

   237 	case YUM_STATE_FILE:

   238 		memcpy(ctx->p, s, len);

   239 		ctx->p += len;

   240 		*ctx->p = '\0';

   241 		break;

   242 	}

   243 }

   244 

   245 static void

   246 yum_filelists_start_element(void *data, const char *name, const char **atts)

   247 {

   248 	struct yum_context *ctx = data;

   249 	const char *pkg, *pkgid;

   250 	int i;

   251 

   252 	if (strcmp(name, "package") == 0) {

   253 		pkg = NULL;

   254 		pkgid = NULL;

   255 		for (i = 0; atts[i]; i += 2) {

   256 			if (strcmp(atts[i], "name") == 0)

   257 				pkg = atts[i + 1];

   258 			else if (strcmp(atts[i], "pkgid") == 0)

   259 				pkgid = atts[i + 1];

   260 		}

   261 		if (strcmp(pkgid, ctx->pkgid) != 0)

   262 			fprintf(stderr, "primary.xml and filelists.xml "

   263 				"mismatch for %s: %s vs %s",

   264 				pkg, pkgid, ctx->pkgid);

   265 	} else if (strcmp(name, "file") == 0) {

   266 		ctx->state = YUM_STATE_FILE;

   267 		ctx->p = ctx->buffer;

   268 	}

   269 }

   270 

   271 

   272 static void

   273 yum_filelists_end_element (void *data, const char *name)

   274 {

   275 	struct yum_context *ctx = data;

   276 

   277 	ctx->state = YUM_STATE_BEGIN;

   278 	if (strcmp(name, "package") == 0) {

   279 		XML_StopParser(ctx->current_parser, XML_TRUE);

   280 		ctx->current_parser = ctx->primary_parser;

   281 		razor_importer_finish_package(ctx->importer);

   282 	} else if (strcmp(name, "file") == 0)

   283 		razor_importer_add_file(ctx->importer, ctx->buffer);

   284 

   285 }

   286 

   287 #define XML_BUFFER_SIZE 4096

   288 

   289 struct razor_set *

   290 razor_set_create_from_yum(void)

   291 {

   292 	struct yum_context ctx;

   293 	void *buf;

   294 	int len, ret;

   295 	gzFile primary, filelists;

   296 	XML_ParsingStatus status;

   297 

   298 	ctx.importer = razor_importer_create();

   299 	ctx.state = YUM_STATE_BEGIN;

   300 

   301 	ctx.primary_parser = XML_ParserCreate(NULL);

   302 	XML_SetUserData(ctx.primary_parser, &ctx);

   303 	XML_SetElementHandler(ctx.primary_parser,

   304 			      yum_primary_start_element,

   305 			      yum_primary_end_element);

   306 	XML_SetCharacterDataHandler(ctx.primary_parser,

   307 				    yum_character_data);

   308 

   309 	ctx.filelists_parser = XML_ParserCreate(NULL);

   310 	XML_SetUserData(ctx.filelists_parser, &ctx);

   311 	XML_SetElementHandler(ctx.filelists_parser,

   312 			      yum_filelists_start_element,

   313 			      yum_filelists_end_element);

   314 	XML_SetCharacterDataHandler(ctx.filelists_parser,

   315 				    yum_character_data);

   316 

   317 	primary = gzopen("primary.xml.gz", "rb");

   318 	if (primary == NULL)

   319 		return NULL;

   320 	filelists = gzopen("filelists.xml.gz", "rb");

   321 	if (filelists == NULL)

   322 		return NULL;

   323 

   324 	ctx.current_parser = ctx.primary_parser;

   325 

   326 	ctx.current = 0;

   327 

   328 	do {

   329 		XML_GetParsingStatus(ctx.current_parser, &status);

   330 		switch (status.parsing) {

   331 		case XML_SUSPENDED:

   332 			ret = XML_ResumeParser(ctx.current_parser);

   333 			break;

   334 		case XML_PARSING:

   335 		case XML_INITIALIZED:

   336 			buf = XML_GetBuffer(ctx.current_parser,

   337 					    XML_BUFFER_SIZE);

   338 			if (ctx.current_parser == ctx.primary_parser)

   339 				len = gzread(primary, buf, XML_BUFFER_SIZE);

   340 			else

   341 				len = gzread(filelists, buf, XML_BUFFER_SIZE);

   342 			if (len < 0) {

   343 				fprintf(stderr,

   344 					"couldn't read input: %s\n",

   345 					strerror(errno));

   346 				return NULL;

   347 			}

   348 

   349 			XML_ParseBuffer(ctx.current_parser, len, len == 0);

   350 			break;

   351 		case XML_FINISHED:

   352 			break;

   353 		}

   354 	} while (status.parsing != XML_FINISHED);

   355 

   356 

   357 	XML_ParserFree(ctx.primary_parser);

   358 	XML_ParserFree(ctx.filelists_parser);

   359 

   360 	gzclose(primary);

   361 	gzclose(filelists);

   362 

   363 	printf ("\nsaving\n");

   364 	return razor_importer_finish(ctx.importer);

   365 }
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