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/**************************************************************************
* Copyright (C) 2010-2011 by Eugene V. Lyubimkin *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License *
* (version 3 or above) as published by the Free Software Foundation. *
* *
* This program 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 GPL *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA *
**************************************************************************/
#include <iostream>
using std::cout;
using std::endl;
using std::cin;
#include <dlfcn.h>
#include <readline/readline.h>
#include <readline/history.h>
#include <cupt/cache/package.hpp>
#include "../common.hpp"
#include "../cupt.hpp"
#include "../handlers.hpp"
bool shellMode = false;
class Readline
{
string __prompt;
static char* (*__dl_readline)(const char*);
static void (*__dl_add_history)(const char*);
string __gnu_readline()
{
char* buffer = __dl_readline(__prompt.c_str());
if (!buffer)
{
return string();
}
string result(buffer);
free(buffer);
if (!result.empty())
{
__dl_add_history(result.c_str());
}
return result;
}
string __simple_get_line()
{
string result;
cout << __prompt;
std::getline(cin, result);
return result;
}
public:
Readline(const string& prompt)
: __prompt(prompt)
{}
string getLine()
{
string result;
start:
result = (__dl_readline && __dl_add_history) ? __gnu_readline() : __simple_get_line();
if (result.empty())
{
goto start;
}
else if (result == "exit" || result == "quit" || result == ":q" || result == "q")
{
result.clear();
}
return result;
}
static void init()
{
auto handle = dlopen("libreadline.so.7", RTLD_NOW);
if (!handle)
{
warn2(__("unable to dynamically find libreadline.so.7: dlopen: %s"), dlerror());
return;
}
__dl_readline = reinterpret_cast< decltype(__dl_readline) >(dlsym(handle, "readline"));
if (!__dl_readline)
{
warn2(__("unable to dynamically bind the symbol '%s': %s"), "readline", dlerror());
}
__dl_add_history = reinterpret_cast< decltype(__dl_add_history) >(dlsym(handle, "add_history"));
if (!__dl_add_history)
{
warn2(__("unable to dynamically bind the symbol '%s': %s"), "add_history", dlerror());
}
}
};
char* (*Readline::__dl_readline)(const char*) = NULL;
void (*Readline::__dl_add_history)(const char*) = NULL;
void convertLineToArgcArgv(const string& cuptCommand, const string& line, int& argc, char**& argv)
{
auto arguments = convertLineToShellArguments(line);
argc = arguments.size() + 1;
argv = new char*[argc];
argv[0] = strdup(cuptCommand.c_str());
for (int i = 1; i < argc; ++i)
{
argv[i] = strdup(arguments[i-1].c_str());
}
}
void freeArgcArgv(int argc, char** argv)
{
for (int i = 0; i < argc; ++i)
{
free(argv[i]);
}
delete [] argv;
}
int shell(Context& context)
{
shellMode = true;
vector< string > arguments;
bpo::options_description noOptions;
parseOptions(context, noOptions, arguments);
checkNoExtraArguments(arguments);
Readline::init();
cout << __("This is an interactive shell of the cupt package manager.\n");
const shared_ptr< Config > oldConfig(new Config(*(context.getConfig())));
const string cuptCommand = context.argv[0];
Readline term(/* prompt */ "cupt> ");
string line;
while (line = term.getLine(), !line.empty())
{
int argc;
char** argv;
convertLineToArgcArgv(cuptCommand, line, argc, argv);
mainEx(argc, argv, context);
*(context.getConfig()) = *oldConfig;
freeArgcArgv(argc, argv);
}
return 0;
}
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