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Copy pathplugin.cpp
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120 lines (97 loc) · 5.21 KB
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// system headers
#include <filesystem>
#include <regex>
#include <set>
#include <string>
// local headers
#include "linuxdeploy/log/log.h"
#include "linuxdeploy/plugin/plugin.h"
#include "linuxdeploy/util/util.h"
#include "plugin_type0.h"
using namespace linuxdeploy::log;
namespace fs = std::filesystem;
namespace linuxdeploy {
namespace plugin {
IPlugin* createPluginInstance(const std::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 = fs::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 = fs::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 (!fs::is_directory(dir))
continue;
ldLog() << LD_DEBUG << "Searching for plugins in directory" << dir << std::endl;
bool extendedDebugLoggingEnabled = (getenv("DEBUG_PLUGIN_DETECTION") != nullptr);
for (fs::directory_iterator i(dir); i != fs::directory_iterator(); ++i) {
// must be a file, and not a directory
try {
if (fs::is_directory(fs::absolute(*i))) {
if (extendedDebugLoggingEnabled)
ldLog() << LD_DEBUG << "Entry is a directory, skipping:" << i->path() << std::endl;
continue;
}
// file must be executable...
static constexpr auto isExecutable = fs::perms::owner_exec | fs::perms::group_exec | fs::perms::others_exec;
if (!(static_cast<unsigned int>(fs::status(*i).permissions()) & static_cast<unsigned int>(isExecutable))) {
if (extendedDebugLoggingEnabled)
ldLog() << LD_DEBUG << "File/symlink is not executable, skipping:" << i->path() << std::endl;
continue;
}
} catch(std::filesystem::filesystem_error const& ex) {
ldLog() << LD_DEBUG
<< "Got file system error while looking for plugins : " << ex.what() << std::endl
<< "path1(): " << ex.path1() << std::endl
<< "path2(): " << ex.path2() << std::endl
<< "code().value(): " << ex.code().value() << std::endl
<< "code().message(): " << ex.code().message() << std::endl
<< "code().category(): " << ex.code().category().name() << std::endl;
}
// entry name must match regular expression
std::cmatch res;
if (!std::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;
}
}
}