/* wrapper/plugin-load.h -- load rvs plugins into mem
   system depens: <stdio.h>, GNU <string.h>
   Copyright (C) 2009 Luke Shumaker
   
   This file is part of rvs.
   
   rvs is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your
   option) any later version.
   
   rvs 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 General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with rvs; see the file COPYING.
   If not, write to the Free Software Foundation,
   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

#include <stdio.h>
#include <string.h>

#include "rvs.h"
#include "plugins.h"
#include "plugin-parse.h"

#include "plugin-load.h"

/*- plugin_load ----------------------------------------------------*\
   now, load plugin plug_name,
\*  whose configuration file is plugin_conf                         */
struct plugin *
plugin_load (const char *plug_name)
{
	struct plugin *plugin=xmalloc( sizeof(*plugin) );
	plugin->name=stralloc(plug_name);
	plugin->next=NULL;
	
	xchdir(plug_name);
	FILE *file = xfopen(plugin_conf,"r");
	plugin->commands=plugin_parse(plugin, file);
	fclose( file );
	xchdir("..");
	
	return plugin;
}

/*- load_plugins ---------------------------------------------------*\
   Load all the plugins
   assume we're in rvs's libexecdir, where plugins are
\* Use `plugin_conf' as the name of the config file for each plugin */

struct plugin *
load_plugins (FILE *list)
{
	struct plugin *first=NULL;   /* we return this */
	struct plugin **prev=&first; /* this is the previous plugin->next */
	struct plugin *plugin;       /* this is the current  plugin */
	
	size_t nbytes = 10;
	char *plug_name=(char *)xmalloc(nbytes);
	while ( getline(&plug_name, &nbytes, list) > 0 ) {
		char *del=strchr(plug_name,'\n');
		del[0]='\0';
		/*if (strlen(plug_name)!=0) {*/
		if (plug_name[0]!='\0') {;
			plugin=plugin_load(plug_name);
			*prev=plugin;/* this sets the last's `next' */
			prev=&plugin->next;
		}
	}
	
	return first;
}