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/*
* Copyright (C) 2018 Red Hat, Inc.
*
* Licensed under the GNU Lesser General Public License Version 2.1
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* This is example libdnf plugin. It works with applications that uses "context" libdnf API
* (eg. microdnf and PackageKit).
* The plugin writes information about repositories in the context and about packages in
* the goal into the file.
*/
#define OUT_FILE_PATH "/tmp/libdnf_test_plugin.log"
#include <libdnf/plugin/plugin.h>
#include <libdnf/libdnf.h>
#include <stdio.h>
#include <stdlib.h>
// Information about this plugin
// Pointer to this structure is returned by pluginGetInfo().
static const PluginInfo info = {
.name = "ExamplePlugin",
.version = "1.0.0"
};
// Plugin instance private data
// Pointer to instance of this structure is returned by pluginInitHandle() as handle.
struct _PluginHandle
{
PluginMode mode;
DnfContext * context; // store plugin context specific init data
FILE * outStream; // stream to write output
};
// Returns general information about this plugin.
// Can be called at any time.
const PluginInfo * pluginGetInfo(void)
{
return &info;
}
// Creates new instance of this plugin. Returns its handle.
PluginHandle * pluginInitHandle(int version, PluginMode mode, DnfPluginInitData * initData)
{
PluginHandle * handle = NULL;
FILE * outStream = fopen(OUT_FILE_PATH, "a");
if (!outStream)
return handle;
do {
fprintf(outStream, "===============================================================\n");
fprintf(outStream, "%s: %s: enter =========================\n", info.name, __func__);
fprintf(outStream, "Plugin version=\"%s\", received API version=%i, received mode=\"%i\"\n",
info.version, version, mode);
if (version != 1) {
fprintf(outStream, "%s: %s: Error: Unsupported API version\n", info.name, __func__);
break;
}
if (mode != PLUGIN_MODE_CONTEXT) {
fprintf(outStream, "%s: %s: Warning: Unsupported mode\n", info.name, __func__);
break;
}
handle = malloc(sizeof(*handle));
if (handle) {
handle->mode = mode;
handle->context = pluginGetContext(initData);
handle->outStream = outStream;
}
} while (0);
fprintf(outStream, "%s: %s: exit =========================\n", info.name, __func__);
if (handle)
fflush(outStream);
else
fclose(outStream);
return handle;
}
// Destroys the plugin instance identified by given handle.
void pluginFreeHandle(PluginHandle * handle)
{
if (handle) {
fprintf(handle->outStream, "%s: %s: ===========================\n", info.name, __func__);
fprintf(handle->outStream, "===============================================================\n\n");
fclose(handle->outStream);
free(handle);
}
}
// Writes a list of "packages". For each package is written a list of packages
// thats are upgraded/downgraded/obsoleted by this package. These packages are added into
// the "obsoleted" array.
static void writeInfo(FILE * f, HyGoal goal, GPtrArray * packages, GPtrArray * obsoleted,
const char * header, const char * obsoleteText)
{
if (packages->len == 0)
return;
fprintf(f, "%s", header);
for (unsigned int i = 0; i < packages->len; ++i) {
DnfPackage * pkg = g_ptr_array_index(packages, i);
fprintf(f, " %s@%s\n", dnf_package_get_nevra(pkg), dnf_package_get_reponame(pkg));
// list of upgraded, downgraded, obsoleted packages
g_autoptr(GPtrArray) obsoletedPackages = hy_goal_list_obsoleted_by_package(goal, pkg);
for (unsigned int obsIdx = 0; obsIdx < obsoletedPackages->len; ++obsIdx) {
DnfPackage * obsPkg = g_ptr_array_index(obsoletedPackages, obsIdx);
fprintf(f, " %-25s%s\n", obsoleteText, dnf_package_get_nevra(obsPkg));
// Package can be obsoleted by more packages.
// Do not add it into the "obsoleted" array more that once.
gboolean found = FALSE;
for (unsigned int allObsIdx = 0; allObsIdx < obsoleted->len; ++allObsIdx) {
found = dnf_package_get_identical(g_ptr_array_index(obsoleted, allObsIdx), obsPkg);
if (found)
break;
}
if (!found)
g_ptr_array_add(obsoleted, g_object_ref(obsPkg));
}
}
}
int pluginHook(PluginHandle * handle, PluginHookId id, DnfPluginHookData * hookData, DnfPluginError * error)
{
if (!handle)
return 1;
fprintf(handle->outStream, "%s: %s: id=%i enter ========================\n", info.name, __func__, id);
switch (id) {
case PLUGIN_HOOK_ID_CONTEXT_PRE_TRANSACTION:
fprintf(handle->outStream, "Info before libdnf context transaction run:\n");
// write info about loaded repos
fprintf(handle->outStream, "Info about loaded repos:\n");
GPtrArray * repos = dnf_context_get_repos(handle->context);
for (unsigned int i = 0; i < repos->len; ++i) {
DnfRepo * repo = g_ptr_array_index(repos, i);
const gchar * repoId = dnf_repo_get_id(repo);
g_autofree gchar * description = dnf_repo_get_description(repo);
bool enabled = (dnf_repo_get_enabled(repo) & DNF_REPO_ENABLED_PACKAGES) > 0;
fprintf(handle->outStream, "Repo enabled=%i, repoId=%s, repoDescr=\"%s\"\n", enabled, repoId, description);
}
// write info about packages in goal
fprintf(handle->outStream, "Info about packages in goal:\n");
HyGoal goal = hookContextTransactionGetGoal(hookData);
if (goal) {
// "obsoleted" array will be filled with obsoleted/updated/downgraded packages
g_autoptr(GPtrArray) obsoleted = g_ptr_array_new_with_free_func((GDestroyNotify)g_object_unref);
GPtrArray * packages = hy_goal_list_installs(goal, NULL);
if (packages) {
writeInfo(handle->outStream, goal, packages, obsoleted, "Install:\n", "obsoleted");
g_ptr_array_unref(packages);
}
packages = hy_goal_list_reinstalls(goal, NULL);
if (packages) {
writeInfo(handle->outStream, goal, packages, obsoleted, "Reinstall:\n", "obsoleted");
g_ptr_array_unref(packages);
}
packages = hy_goal_list_downgrades(goal, NULL);
if (packages) {
writeInfo(handle->outStream, goal, packages, obsoleted, "Downgrade:\n", "downgraded/obsoleted");
g_ptr_array_unref(packages);
}
packages = hy_goal_list_upgrades(goal, NULL);
if (packages) {
writeInfo(handle->outStream, goal, packages, obsoleted, "Upgrade:\n", "upgraded/obsoleted");
g_ptr_array_unref(packages);
}
packages = hy_goal_list_erasures(goal, NULL);
if (packages) {
if (packages->len)
fprintf(handle->outStream, "Remove:\n");
for (unsigned int i = 0; i < packages->len; ++i) {
DnfPackage * pkg = g_ptr_array_index(packages, i);
fprintf(handle->outStream, " %s\n", dnf_package_get_nevra(pkg));
}
g_ptr_array_unref(packages);
}
if (obsoleted->len) {
fprintf(handle->outStream, "Summary of upgraded, downgraded, obsoleted:\n");
for (unsigned int i = 0; i < obsoleted->len; ++i) {
DnfPackage * pkg = g_ptr_array_index(obsoleted, i);
fprintf(handle->outStream, " %s\n", dnf_package_get_nevra(pkg));
g_autoptr(GPtrArray) obsoletedByPackages = hy_goal_list_obsoleted_by_package(goal, pkg);
for (unsigned int obsIdx = 0; obsIdx < obsoletedByPackages->len; ++obsIdx) {
DnfPackage * obsPkg = g_ptr_array_index(obsoletedByPackages, obsIdx);
fprintf(handle->outStream, " %-25s%s@%s\n", "by",
dnf_package_get_nevra(obsPkg), dnf_package_get_reponame(obsPkg));
}
}
}
}
break;
default:
break;
}
fprintf(handle->outStream, "%s: %s: id=%i exit ========================\n", info.name, __func__, id);
fflush(handle->outStream);
return 1;
}
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