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polybar/src/main.cpp

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#include "common.hpp"
#include "components/bar.hpp"
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#include "components/command_line.hpp"
#include "components/config.hpp"
#include "components/controller.hpp"
#include "components/ipc.hpp"
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#include "components/logger.hpp"
#include "components/parser.hpp"
#include "components/renderer.hpp"
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#include "settings.hpp"
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#include "utils/env.hpp"
#include "utils/file.hpp"
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#include "utils/inotify.hpp"
#include "utils/io.hpp"
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#include "utils/process.hpp"
#include "x11/connection.hpp"
#include "x11/tray_manager.hpp"
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using namespace polybar;
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int main(int argc, char** argv) {
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// clang-format off
const command_line::options opts{
command_line::option{"-h", "--help", "Display this help and exit"},
command_line::option{"-v", "--version", "Display build details and exit"},
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command_line::option{"-l", "--log", "Set the logging verbosity (default: WARNING)", "LEVEL", {"error", "warning", "info", "trace"}},
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command_line::option{"-q", "--quiet", "Be quiet (will override -l)"},
command_line::option{"-c", "--config", "Path to the configuration file", "FILE"},
command_line::option{"-r", "--reload", "Reload when the configuration has been modified"},
command_line::option{"-d", "--dump", "Print value of PARAM in section [bar_name] and exit", "PARAM"},
command_line::option{"-m", "--list-monitors", "Print list of available monitors and exit"},
command_line::option{"-w", "--print-wmname", "Print the generated WM_NAME and exit"},
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command_line::option{"-s", "--stdout", "Output data to stdout instead of drawing the X window"},
};
// clang-format on
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uint8_t exit_code{EXIT_SUCCESS};
bool reload{false};
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logger& logger{const_cast<decltype(logger)>(logger::make(loglevel::WARNING))};
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try {
//==================================================
// Parse command line arguments
//==================================================
string scriptname{argv[0]};
vector<string> args{argv + 1, argv + argc};
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command_line::parser::make_type cli{command_line::parser::make(move(scriptname), move(opts))};
cli->process_input(args);
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if (cli->has("quiet")) {
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logger.verbosity(loglevel::ERROR);
} else if (cli->has("log")) {
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logger.verbosity(logger::parse_verbosity(cli->get("log")));
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}
if (cli->has("help")) {
cli->usage();
return EXIT_SUCCESS;
} else if (cli->has("version")) {
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print_build_info(version_details(args));
return EXIT_SUCCESS;
} else if (!cli->has(0)) {
cli->usage();
return EXIT_FAILURE;
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}
//==================================================
// Connect to X server
//==================================================
XInitThreads();
Display* xdisplay{XOpenDisplay(nullptr)};
if (xdisplay == nullptr) {
logger.err("A connection to X could not be established... ");
return EXIT_FAILURE;
}
connection& conn{connection::make(xdisplay)};
conn.ensure_event_mask(conn.root(), XCB_EVENT_MASK_PROPERTY_CHANGE);
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//==================================================
// Load user configuration
//==================================================
string confpath;
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if (cli->has("config")) {
confpath = cli->get("config");
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} else if (env_util::has("XDG_CONFIG_HOME")) {
confpath = env_util::get("XDG_CONFIG_HOME") + "/polybar/config";
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} else if (env_util::has("HOME")) {
confpath = env_util::get("HOME") + "/.config/polybar/config";
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} else {
throw application_error("Define configuration using --config=PATH");
}
config::make_type conf{config::make(move(confpath), cli->get(0))};
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//==================================================
// Dump requested data
//==================================================
if (cli->has("dump")) {
printf("%s\n", conf.get(conf.section(), cli->get("dump")).c_str());
return EXIT_SUCCESS;
}
if (cli->has("print-wmname")) {
printf("%s\n", bar::make(true)->settings().wmname.c_str());
return EXIT_SUCCESS;
}
if (cli->has("list-monitors")) {
for (auto&& mon : randr_util::get_monitors(conn, conn.root(), true)) {
if (ENABLE_XRANDR_MONITORS && mon->output == XCB_NONE) {
printf("%s: %ix%i+%i+%i (XRandR monitor)\n", mon->name.c_str(), mon->w, mon->h, mon->x, mon->y);
} else {
printf("%s: %ix%i+%i+%i\n", mon->name.c_str(), mon->w, mon->h, mon->x, mon->y);
}
}
return EXIT_SUCCESS;
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}
//==================================================
// Create controller and run application
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//==================================================
unique_ptr<ipc> ipc{};
unique_ptr<inotify_watch> config_watch{};
if (conf.get(conf.section(), "enable-ipc", false)) {
ipc = ipc::make();
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}
if (cli->has("reload")) {
config_watch = inotify_util::make_watch(conf.filepath());
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}
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auto ctrl = controller::make(move(ipc), move(config_watch));
if (!ctrl->run(cli->has("stdout"))) {
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reload = true;
}
} catch (const exception& err) {
logger.err(err.what());
exit_code = EXIT_FAILURE;
}
logger.info("Waiting for spawned processes to end");
while (process_util::notify_childprocess()) {
;
}
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if (reload) {
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logger.info("Re-launching application...");
process_util::exec(move(argv[0]), move(argv));
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}
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logger.info("Reached end of application...");
return exit_code;
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}