minecraft-pi-reborn/launcher/src/main.cpp

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2024-05-12 07:19:01 +00:00
#include <cstdlib>
#include <libreborn/libreborn.h>
#include <sys/stat.h>
#include "bootstrap.h"
#include "options/parser.h"
#include "crash-report.h"
#include "util.h"
#ifndef MCPI_SERVER_MODE
#include "client/configuration.h"
#endif
// Bind Options To Environmental Variable
static void bind_to_env(const char *env, const bool value) {
const bool force = env[0] == '_';
if (force || value) {
set_and_print_env(env, value ? "1" : nullptr);
}
}
static void setup_environment(const options_t &options) {
// Passthrough Options To Game
#ifndef MCPI_SERVER_MODE
bind_to_env("_MCPI_BENCHMARK", options.benchmark);
#else
bind_to_env("_MCPI_ONLY_GENERATE", options.only_generate);
#endif
// GTK Dark Mode
#ifndef MCPI_HEADLESS_MODE
set_and_print_env("GTK_THEME", "Adwaita:dark");
#endif
// Configure PATH
{
// Get Binary Directory
char *binary_directory = get_binary_directory();
std::string new_path = std::string(binary_directory) + "/bin";
free(binary_directory);
// Add Existing PATH
{
char *value = getenv("PATH");
if (value != nullptr && strlen(value) > 0) {
new_path += std::string(":") + value;
}
}
// Set And Free
set_and_print_env("PATH", new_path.c_str());
}
}
// Non-Launch Commands
static void handle_non_launch_commands(const options_t &options) {
if (options.copy_sdk) {
char *binary_directory = get_binary_directory();
copy_sdk(binary_directory, false);
free(binary_directory);
fflush(stdout);
exit(EXIT_SUCCESS);
}
}
// Exit Handler
static void exit_handler(__attribute__((unused)) int signal_id) {
// Pass Signal To Child
murder_children();
while (wait(nullptr) > 0) {}
_exit(EXIT_SUCCESS);
}
// Start The Game
static void start_game(const options_t &options) {
// Disable stdout Buffering
setvbuf(stdout, nullptr, _IONBF, 0);
// Environemntal Variable Options
setup_environment(options);
// Setup Crash Reporting
if (!options.disable_crash_report) {
setup_log_file();
setup_crash_report();
}
// Install Signal Handlers
struct sigaction act_sigint = {};
act_sigint.sa_flags = SA_RESTART;
act_sigint.sa_handler = &exit_handler;
sigaction(SIGINT, &act_sigint, nullptr);
struct sigaction act_sigterm = {};
act_sigterm.sa_flags = SA_RESTART;
act_sigterm.sa_handler = &exit_handler;
sigaction(SIGTERM, &act_sigterm, nullptr);
// Setup Home
#ifndef MCPI_SERVER_MODE
// Ensure $HOME
const char *home = getenv("HOME");
if (home == nullptr) {
ERR("$HOME Isn't Set");
}
// Create If Needed
{
std::string minecraft_folder = std::string(home) + HOME_SUBDIRECTORY_FOR_GAME_DATA;
struct stat tmp_stat = {};
bool exists = stat(minecraft_folder.c_str(), &tmp_stat) != 0 ? false : S_ISDIR(tmp_stat.st_mode);
if (!exists) {
// Doesn't Exist
if (mkdir(minecraft_folder.c_str(), S_IRUSR | S_IWUSR | S_IXUSR) != 0) {
ERR("Unable To Create Data Directory: %s", strerror(errno));
}
}
}
#else
// Set Home To Current Directory, So World Data Is Stored There
char *launch_directory = getcwd(NULL, 0);
set_and_print_env("HOME", launch_directory);
free(launch_directory);
#endif
// Configure Client Options
#ifndef MCPI_SERVER_MODE
configure_client(options);
#endif
// Bootstrap
bootstrap();
}
// Main
int main(int argc, char *argv[]) {
// Parse Options
options_t options = parse_options(argc, argv);
// Set Debug Tag
reborn_debug_tag = "(Launcher) ";
// Debug Logging
bind_to_env(MCPI_DEBUG_ENV, options.debug);
// Handle Non-Launch Commands (Copy SDK, Print Feature Flags, Etc)
handle_non_launch_commands(options);
#ifndef MCPI_SERVER_MODE
handle_non_launch_client_only_commands(options);
#endif
// Check Environment
#ifndef MCPI_SERVER_MODE
// Code After This Can Safely Open A Window
check_environment_client();
#endif
// Start The Game
start_game(options);
}