Skip to content

2013-12-30-XBPS-API-example-list-pkgs-in-a-repo.md

Latest commit

 

History

History
92 lines (75 loc) · 2.35 KB

2013-12-30-XBPS-API-example-list-pkgs-in-a-repo.md

File metadata and controls

92 lines (75 loc) · 2.35 KB
layout post
title XBPS API example: list pkgs in a repo (emulating pacman -Sl repo)
comments true

In this post I'll show another simple example of the XBPS API that allows you to list all packages in a repository (local or remote); the output emulates the pacman -Sl repo command from the Archlinux distribution:

{% highlight C %} #include <stdio.h> #include <stdlib.h> #include <string.h> #include <xbps.h>

static int repo_foreach(struct xbps_repo *repo, void *arg, bool *done) { xbps_dictionary_t pkgd; xbps_object_t obj; xbps_object_iterator_t iter; const char *pkgver;

/* ignore empty repos */
if (repo->idx == NULL)
	return 0;

/* Iterate over the repository index dictionary */
iter = xbps_dictionary_iterator(repo->idx);
while ((obj = xbps_object_iterator_next(iter)) != NULL) {
	pkgd = xbps_dictionary_get_keysym(repo->idx, obj);
	xbps_dictionary_get_cstring_nocopy(pkgd, "pkgver", &pkgver);
	printf("%s %s", repo->uri, pkgver);
	if (xbps_pkgdb_get_pkg(repo->xhp, pkgver))
		printf(" [installed]");
	printf("\n");
}
xbps_object_iterator_release(iter);

return 0;

}

int main(int argc, char **argv) { struct xbps_handle xh; int rv;

if (argc != 2) {
	fprintf(stdout, "usage: %s repourl\n", argv[0]);
	exit(EXIT_FAILURE);
}

memset(&xh, 0, sizeof(xh));
/*
 * We specify an unexistent conf file to make sure that only specified repo
 * is being used.
 */
xh.conffile = "dr_pwwker_is_watching_you";
/*
 * And then we add the specified repo to the repositories array.
 */
xh.repositories = xbps_array_create();
xbps_array_add_cstring_nocopy(xh.repositories, argv[1]);

if ((rv = xbps_init(&xh)) != 0) {
	fprintf(stderr, "failed to initialize libxbps: %s\n", strerror(rv));
	exit(EXIT_FAILURE);
}
rv = xbps_rpool_foreach(&xh, repo_foreach, NULL);
exit(rv);

} {% endhighlight %}

To compile the example you'll have to install some additional packages:

# xbps-install -Sy gcc libxbps-devel pkg-config

And then to compile the C source code:

$ cc `pkg-config --cflags --libs libxbps` list_pkgs_in_repo.c

You can then specify a repository url to list all stored packages in this repository:

$ ./a.out http://xbps.nopcode.org/repos/current
http://xbps.nopcode.org/repos/current blah-1.0_1 [installed]
http://xbps.nopcode.org/repos/current foo-1.0_1
...

Please check out /usr/include/xbps.h to know more about the XBPS API.