// system headers

#include <set>

#include <string>

#include <vector>

// library headers

#include <boost/filesystem.hpp>

#include <boost/regex.hpp>

#include <fnmatch.h>

// local headers

#include "linuxdeploy/core/log.h"

#include "linuxdeploy/plugin/base.h"

#include "linuxdeploy/plugin/plugin.h"

#include "linuxdeploy/util/util.h"

#include "plugin_type0.h"

using namespace linuxdeploy::core;

using namespace linuxdeploy::core::log;

namespace bf = boost::filesystem;

namespace linuxdeploy {

namespace plugin {

IPlugin* createPluginInstance(const boost::filesystem::path& path) {

IPlugin* rv = nullptr;

// test whether it's a type 0 plugin

try {

rv = new Type0Plugin(path);

} catch (const WrongApiLevelError& e) {

ldLog() << LD_DEBUG << e.what() << std::endl;

}

return rv;

}

std::map<std::string, IPlugin*> findPlugins() {

std::map<std::string, IPlugin*> foundPlugins;

const auto PATH = getenv("PATH");

auto paths = util::split(PATH, ':');

auto currentExeDir = bf::path(util::getOwnExecutablePath()).parent_path();

paths.insert(paths.begin(), currentExeDir.string());

// if shipping as an AppImage, search for plugins in AppImage's location first

// this way, plugins in the AppImage's directory take precedence over bundled ones

if (getenv("APPIMAGE") != nullptr) {

auto appImageDir = bf::path(getenv("APPIMAGE")).parent_path();

paths.insert(paths.begin(), appImageDir.string());

}

// also, look for plugins in current working directory

// could be useful in a "use linuxdeploy centrally, but download plugins into project directory" scenario

std::shared_ptr<char> cwd(get_current_dir_name(), free);

paths.emplace_back(cwd.get());

for (const auto& dir : paths) {

if (!bf::is_directory(dir))

continue;

ldLog() << LD_DEBUG << "Searching for plugins in directory" << dir << std::endl;

bool extendedDebugLoggingEnabled = (getenv("DEBUG_PLUGIN_DETECTION") != nullptr);

for (bf::directory_iterator i(dir); i != bf::directory_iterator(); ++i) {

// must be a file, and not a directory

if (bf::is_directory(bf::absolute(*i))) {

if (extendedDebugLoggingEnabled)

ldLog() << LD_DEBUG << "Entry is a directory, skipping:" << i->path() << std::endl;

continue;

}

// file must be executable...

if (!(bf::status(*i).permissions() & (bf::owner_exe | bf::group_exe | bf::others_exe))) {

if (extendedDebugLoggingEnabled)

ldLog() << LD_DEBUG << "File/symlink is not executable, skipping:" << i->path() << std::endl;

continue;

}

// entry name must match regular expression

boost::cmatch res;

if (!boost::regex_match(i->path().filename().string().c_str(), res, PLUGIN_EXPR)) {

ldLog() << LD_DEBUG << "Doesn't match plugin regex, skipping:" << i->path() << std::endl;

continue;

}

try {

auto name = res[1].str();

auto* plugin = createPluginInstance(*i);

if (plugin == nullptr) {

ldLog() << LD_DEBUG << "Failed to create instance for plugin" << i->path() << std::endl;;

} else {

ldLog() << LD_DEBUG << "Found plugin '" << LD_NO_SPACE << name << LD_NO_SPACE << "':" << plugin->path() << std::endl;

if (foundPlugins.find(name) != foundPlugins.end()) {

ldLog() << LD_DEBUG << "Already found" << name << "plugin in" << foundPlugins[name]->path() << std::endl;

} else {

foundPlugins[name] = plugin;

}

}

} catch (const PluginError& e) {

ldLog() << LD_WARNING << "Could not load plugin" << i->path() << LD_NO_SPACE << ": " << e.what();

}

}

}

return foundPlugins;

}

}

}