gplugin/gplugin

Add option in meson to install helper application

2020-10-12, Sorvival
90d067db1688
Add option in meson to install helper application

Added two new options in meson that allow choosing whether the helper applications (gplugin-gtk-viewer and gplugin-query) are going to be installed or not

Testing Done:
Compiled a few times switching the two new options between true and false and verifying that the behavior was correct.

Bugs closed: GPLUGIN-129

Reviewed at https://reviews.imfreedom.org/r/159/
/*
* Copyright (C) 2011-2020 Gary Kramlich <grim@reaperworld.com>
*
* 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 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, see <https://www.gnu.org/licenses/>.
*/
#include <gplugin/gplugin-core.h>
#include <gplugin/gplugin-loader.h>
/**
* SECTION:gplugin-loader
* @title: Plugin Loader
* @short_description: Abstract class for loading plugins
*
* GPluginLoader defines the base behavior for loaders of all languages.
*/
/**
* GPLUGIN_TYPE_LOADER:
*
* The standard _get_type macro for #GPluginLoader.
*/
/**
* GPluginLoader:
*
* An abstract class that should not be accessed directly.
*/
/**
* GPluginLoaderClass:
* @supported_extensions: The supported_extensions vfunc returns a #GList of
* file extensions that this loader supports without the
* leading dot. For example: 'so', 'dll', 'py', etc.
* @query: The query vfunc is called when the plugin manager needs to query a
* plugin that has a file extension from @supported_extensions.
* @load: The load vfunc is called when the plugin manager wants to load a
* plugin that was previously queried by this loader.
* @unload: The unload vfunc is called when the plugin manager wants to unload
* a previously loaded plugin from this loader.
*
* #GPluginLoaderClass defines the behavior for loading plugins.
*/
/******************************************************************************
* GObject Implementation
*****************************************************************************/
G_DEFINE_ABSTRACT_TYPE(GPluginLoader, gplugin_loader, G_TYPE_OBJECT);
static void
gplugin_loader_init(G_GNUC_UNUSED GPluginLoader *loader)
{
}
static void
gplugin_loader_class_init(G_GNUC_UNUSED GPluginLoaderClass *klass)
{
}
/******************************************************************************
* API
*****************************************************************************/
/**
* gplugin_loader_query_plugin:
* @loader: The #GPluginLoader instance performing the query.
* @filename: The filename to query.
* @error: (nullable): The return location for a #GError, or %NULL.
*
* This function is called by the plugin manager to ask @loader to query
* @filename and determine if it's a usable plugin.
*
* Return value: (transfer full): A #GPluginPlugin instance or %NULL on
* failure.
*/
GPluginPlugin *
gplugin_loader_query_plugin(
GPluginLoader *loader,
const gchar *filename,
GError **error)
{
GPluginLoaderClass *klass = NULL;
g_return_val_if_fail(loader != NULL, NULL);
g_return_val_if_fail(GPLUGIN_IS_LOADER(loader), NULL);
g_return_val_if_fail(filename, NULL);
g_return_val_if_fail(error != NULL, NULL);
klass = GPLUGIN_LOADER_GET_CLASS(loader);
if(klass && klass->query)
return klass->query(loader, filename, error);
return NULL;
}
/**
* gplugin_loader_load_plugin:
* @loader: The #GPluginLoader instance performing the load.
* @plugin: The #GPluginPlugin instance to load.
* @error: (nullable): The return location for a #GError, or %NULL.
*
* This function is called by the plugin manager to ask @loader to load
* @plugin.
*
* Return value: %TRUE if @plugin was loaded successfully, %FALSE otherwise.
*/
gboolean
gplugin_loader_load_plugin(
GPluginLoader *loader,
GPluginPlugin *plugin,
GError **error)
{
GPluginLoaderClass *klass = NULL;
gboolean ret = FALSE;
g_return_val_if_fail(loader != NULL, FALSE);
g_return_val_if_fail(GPLUGIN_IS_LOADER(loader), FALSE);
g_return_val_if_fail(GPLUGIN_IS_PLUGIN(plugin), FALSE);
klass = GPLUGIN_LOADER_GET_CLASS(loader);
if(klass && klass->load)
ret = klass->load(loader, plugin, error);
if(!ret && error && *error == NULL) {
g_set_error(
error,
GPLUGIN_DOMAIN,
0,
"Failed to load plugin : unknown");
}
return ret;
}
/**
* gplugin_loader_unload_plugin:
* @loader: The #GPluginLoader instance performing the unload.
* @plugin: The #GPluginPlugin instance to unload.
* @error: (nullable): The return location for a #GError, or %NULL.
*
* This function is called by the plugin manager to ask @loader to unload
* @plugin.
*
* Return value: %TRUE if @plugin was unloaded successfully, %FALSE otherwise.
*/
gboolean
gplugin_loader_unload_plugin(
GPluginLoader *loader,
GPluginPlugin *plugin,
GError **error)
{
GPluginLoaderClass *klass = NULL;
gboolean ret = FALSE;
g_return_val_if_fail(loader != NULL, FALSE);
g_return_val_if_fail(GPLUGIN_IS_LOADER(loader), FALSE);
g_return_val_if_fail(GPLUGIN_IS_PLUGIN(plugin), FALSE);
klass = GPLUGIN_LOADER_GET_CLASS(loader);
if(klass && klass->unload)
ret = klass->unload(loader, plugin, error);
if(!ret && error && *error == NULL) {
g_set_error(
error,
GPLUGIN_DOMAIN,
0,
"Failed to unload plugin : unknown");
}
return ret;
}
/**
* gplugin_loader_get_supported_extensions:
* @loader: The #GPluginLoader instance.
*
* Returns a #GSList of strings containing the extensions that the loader
* supports. Each extension should not include the dot. For example: so,
* dll, py, etc.
*
* Return value: (element-type utf8) (transfer container): A #GSList of
* extensions that the loader supports.
*/
GSList *
gplugin_loader_get_supported_extensions(GPluginLoader *loader)
{
GPluginLoaderClass *klass = NULL;
g_return_val_if_fail(GPLUGIN_IS_LOADER(loader), NULL);
klass = GPLUGIN_LOADER_GET_CLASS(loader);
if(klass != NULL && klass->supported_extensions) {
return klass->supported_extensions(loader);
}
return NULL;
}