kc3-lang/pkgconf/main.c

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• Hash : 3c8bac67
  Author :
  Date : 2011-07-26T20:37:19
  

  main: add --digraph option to generate a representation of the depgraph in graphviz dot format
  

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• main.c

• /*
   * main.c
   * main() routine, printer functions
   *
   * Copyright (c) 2011 William Pitcock <nenolod@dereferenced.org>.
   *
   * Permission to use, copy, modify, and/or distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
   * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
   * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include <libgen.h>
  #include <popt.h>
  
  #include "pkg.h"
  
  /* we are compatible with 0.26 of pkg-config */
  #define PKGCONFIG_VERSION_EQUIV		"0.26"
  
  static int want_version = 0;
  static int want_cflags = 0;
  static int want_libs = 0;
  static int want_modversion = 0;
  static int want_static = 0;
  static int want_requires = 0;
  static int want_variables = 0;
  static int want_digraph = 0;
  static int maximum_traverse_depth = 2;
  
  static char *required_pkgconfig_version = NULL;
  static char *required_module_version = NULL;
  static char *want_variable = NULL;
  
  static void
  print_cflags(pkg_t *pkg, void *unused)
  {
  	if (pkg->cflags != NULL)
  		printf("%s ", pkg->cflags);
  }
  
  static void
  print_libs(pkg_t *pkg, void *unused)
  {
  	if (pkg->libs != NULL)
  		printf("%s ", pkg->libs);
  }
  
  static void
  print_modversion(pkg_t *pkg, void *unused)
  {
  	if (pkg->version != NULL)
  		printf("%s\n", pkg->version);
  }
  
  static void
  print_variable(pkg_t *pkg, void *unused)
  {
  	char *variable;
  
  	variable = tuple_find(pkg->vars, want_variable);
  	if (variable != NULL)
  		printf("%s ", variable);
  }
  
  static void
  print_variables(pkg_t *pkg, void *unused)
  {
  	pkg_tuple_t *node;
  
  	foreach_list_entry(pkg->vars, node)
  		printf("%s\n", node->key);
  }
  
  static void
  print_requires(pkg_t *pkg, void *unused)
  {
  	pkg_dependency_t *node;
  
  	foreach_list_entry(pkg->requires, node)
  	{
  		printf("%s", node->package);
  
  		if (node->version != NULL)
  			printf(" %s %s", pkg_get_comparator(node), node->version);
  
  		printf("\n");
  	}
  }
  
  static void
  print_digraph_node(pkg_t *pkg, void *unused)
  {
  	pkg_dependency_t *node;
  
  	printf("\"%s\" [fontname=Sans fontsize=8]\n", pkg->id);
  
  	foreach_list_entry(pkg->requires, node)
  	{
  		printf("\"%s\" -- \"%s\" [fontname=Sans fontsize=8]\n", node->package, pkg->id);
  	}
  }
  
  typedef struct pkg_queue_ {
  	struct pkg_queue_ *prev, *next;
  	const char *package;
  } pkg_queue_t;
  
  static pkg_queue_t *
  pkg_queue_push(pkg_queue_t *parent, const char *package)
  {
  	pkg_queue_t *pkgq = calloc(sizeof(pkg_queue_t), 1);
  
  	pkgq->package = package;
  	pkgq->prev = parent;
  	if (pkgq->prev != NULL)
  		pkgq->prev->next = pkgq;
  
  	return pkgq;
  }
  
  int
  pkg_queue_walk(pkg_queue_t *head)
  {
  	int wanted_something = 0;
  	pkg_queue_t *pkgq;
  	pkg_t world = (pkg_t){
  		.id = "world",
  		.realname = "virtual"
  	};
  
  	/* if maximum_traverse_depth is one, then we will not traverse deeper
  	 * than our virtual package.
  	 */
  	if (!maximum_traverse_depth)
  		maximum_traverse_depth = -1;
  	else if (maximum_traverse_depth > 0)
  		maximum_traverse_depth++;
  
  	foreach_list_entry(head, pkgq)
  	{
  		pkg_dependency_t *pkgdep;
  
  		pkgdep = parse_deplist(&world, pkgq->package);
  		world.requires = pkg_dependency_append(world.requires, pkgdep);
  	}
  
  	/* we should verify that the graph is complete before attempting to compute cflags etc. */
  	pkg_verify_graph(&world, maximum_traverse_depth);
  
  	if (want_digraph)
  	{
  		printf("graph deptree {\n");
  		printf("edge [color=blue len=7.5 fontname=Sans fontsize=8]\n");
  		printf("node [fontname=Sans fontsize=8]\n");
  
  		pkg_traverse(&world, print_digraph_node, NULL, maximum_traverse_depth);
  
  		printf("}\n");
  
  		return EXIT_SUCCESS;
  	}
  
  	if (want_modversion)
  	{
  		wanted_something = 0;
  		want_cflags = 0;
  		want_libs = 0;
  
  		pkg_traverse(&world, print_modversion, NULL, 2);
  	}
  
  	if (want_variables)
  	{
  		wanted_something = 0;
  		want_cflags = 0;
  		want_libs = 0;
  
  		pkg_traverse(&world, print_variables, NULL, 2);
  	}
  
  	if (want_requires)
  	{
  		pkg_dependency_t *iter;
  
  		wanted_something = 0;
  		want_cflags = 0;
  		want_libs = 0;
  
  		foreach_list_entry(world.requires, iter)
  		{
  			pkg_t *pkg;
  
  			pkg = pkg_verify_dependency(iter);
  			print_requires(pkg, NULL);
  		}
  	}
  
  	if (want_cflags)
  	{
  		wanted_something++;
  		pkg_traverse(&world, print_cflags, NULL, maximum_traverse_depth);
  	}
  
  	if (want_libs)
  	{
  		wanted_something++;
  		pkg_traverse(&world, print_libs, NULL, maximum_traverse_depth);
  	}
  
  	if (want_variable)
  	{
  		wanted_something++;
  		pkg_traverse(&world, print_variable, NULL, 2);
  	}
  
  	if (wanted_something)
  		printf("\n");
  
  	return EXIT_SUCCESS;
  }
  
  static void
  version(void)
  {
  	printf("%s %s\n", PACKAGE_NAME, PACKAGE_VERSION);
  }
  
  int
  main(int argc, const char *argv[])
  {
  	int ret;
  	poptContext opt_context;
  	pkg_queue_t *pkgq = NULL;
  	pkg_queue_t *pkgq_head = NULL;
  
  	struct poptOption options[] = {
  		{ "version", 0, POPT_ARG_NONE, &want_version, 0, "output pkgconf version" },
  		{ "atleast-version", 0, POPT_ARG_STRING, &required_module_version, 0, "require specified version of a package" },
  		{ "atleast-pkgconfig-version", 0, POPT_ARG_STRING, &required_pkgconfig_version, 0, "require compatibility level with specified version of pkg-config" },
  		{ "libs", 0, POPT_ARG_NONE, &want_libs, 0, "output all linker flags" },
  		{ "cflags", 0, POPT_ARG_NONE, &want_cflags, 0, "output all compiler flags" },
  		{ "modversion", 0, POPT_ARG_NONE, &want_modversion, 0, "output package version" },
  		{ "variable", 0, POPT_ARG_STRING, &want_variable, 0, "get the value of the specified variable" },
  		{ "exists", 0, POPT_ARG_NONE, NULL, 0, "return 0 if all packages present" },
  		{ "print-errors", 0, POPT_ARG_NONE, NULL, 0, "dummy option for pkg-config compatibility" },
  		{ "short-errors", 0, POPT_ARG_NONE, NULL, 0, "dummy option for pkg-config compatibility" },
  		{ "maximum-traverse-depth", 0, POPT_ARG_INT, &maximum_traverse_depth, 0, "limits maximum traversal depth of the computed dependency graph" },
  		{ "static", 0, POPT_ARG_NONE, &want_static, 0, "be more aggressive when walking the dependency graph (for intermediary static linking deps)" },
  		{ "print-requires", 0, POPT_ARG_NONE, &want_requires, 0, "print required dependencies of the computed dependency graph" },
  		{ "print-variables", 0, POPT_ARG_NONE, &want_variables, 0, "print variables provided by a package" },
  		{ "digraph", 0, POPT_ARG_NONE, &want_digraph, 0, "build a graphviz digraph (dot) graph of the computed dependency graph" },
  		POPT_AUTOHELP
  		{ NULL, 0, 0, NULL, 0 }
  	};
  
  	opt_context = poptGetContext(NULL, argc, argv, options, 0);
  	ret = poptGetNextOpt(opt_context);
  	if (ret != -1)
  	{
  		fprintf(stderr, "%s: %s\n",
  			poptBadOption(opt_context, POPT_BADOPTION_NOALIAS),
  			poptStrerror(ret));
  		return EXIT_FAILURE;
  	}
  
  	if (want_version)
  	{
  		version();
  		return EXIT_SUCCESS;
  	}
  
  	if (want_static)
  		maximum_traverse_depth++;
  
  	if (required_pkgconfig_version != NULL)
  	{
  		if (pkg_compare_version(PKGCONFIG_VERSION_EQUIV, required_pkgconfig_version) >= 0)
  			return EXIT_SUCCESS;
  
  		return EXIT_FAILURE;
  	}
  
  	if (required_module_version != NULL)
  	{
  		pkg_t *pkg;
  		const char *package;
  
  		package = poptGetArg(opt_context);
  		if (package == NULL)
  			return EXIT_SUCCESS;
  
  		pkg = pkg_find(package);
  		if (pkg == NULL)
  			return EXIT_FAILURE;
  
  		if (pkg_compare_version(pkg->version, required_module_version) >= 0)
  			return EXIT_SUCCESS;
  
  		return EXIT_FAILURE;
  	}
  
  	while (1)
  	{
  		const char *package = poptGetArg(opt_context);
  		if (package == NULL)
  			break;
  
  		pkgq = pkg_queue_push(pkgq, package);
  		if (pkgq_head == NULL)
  			pkgq_head = pkgq;
  	}
  
  	poptFreeContext(opt_context);
  
  	if (pkgq_head == NULL)
  	{
  		fprintf(stderr, "Please specify at least one package name on the command line.\n");
  		return EXIT_FAILURE;
  	}
  
  	return pkg_queue_walk(pkgq_head);
  }
  

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