pkgconf/main.c

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/*
* 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"
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/* we are compatible with 0.26 of pkg-config */
#define PKGCONFIG_VERSION_EQUIV "0.26"
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static int want_version = 0;
static int want_cflags = 0;
static int want_libs = 0;
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static int want_modversion = 0;
static int maximum_traverse_depth = -1;
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static char *required_pkgconfig_version = 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);
}
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){
.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_modversion)
{
wanted_something = 0;
want_cflags = 0;
want_libs = 0;
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pkg_traverse(&world, print_modversion, NULL, 2);
}
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 (wanted_something)
printf("\n");
return EXIT_SUCCESS;
}
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static void
version(void)
{
printf("%s %s\n", PACKAGE_NAME, PACKAGE_VERSION);
}
static bool
check_pkgconfig(const char *progname)
{
char *prognm = strdup(progname);
char *name = basename(prognm);
if (!strcasecmp(name, "pkg-config"))
{
free(prognm);
return true;
}
free(prognm);
return false;
}
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[] = {
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{ "version", 0, POPT_ARG_NONE, &want_version, 0, "output pkgconf version" },
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{ "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" },
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{ "modversion", 0, POPT_ARG_NONE, &want_modversion, 0, "output package version" },
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{ "exists", 0, POPT_ARG_NONE, NULL, 0, "return 0 if all packages present" },
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{ "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" },
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 (check_pkgconfig(argv[0]))
maximum_traverse_depth = 2;
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if (want_version)
{
version();
return EXIT_SUCCESS;
}
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if (required_pkgconfig_version != NULL)
{
return 0;
}
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);
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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);
}