ckb-bin 1.1.0

//! CKB executable.
//!
//! This crate is created to reduce the link time to build CKB.
#[allow(dead_code)]
mod cli;
mod helper;
mod setup;
mod setup_guard;
mod subcommand;
#[cfg(test)]
mod tests;
use ckb_app_config::ExitCode;
use ckb_async_runtime::new_global_runtime;
use ckb_build_info::Version;
use ckb_logger::debug;
use ckb_network::tokio;
use clap::ArgMatches;
use helper::raise_fd_limit;
use setup::Setup;
use setup_guard::SetupGuard;
use time::OffsetDateTime;

#[cfg(not(target_os = "windows"))]
use colored::Colorize;
#[cfg(not(target_os = "windows"))]
use daemonize_me::Daemon;
#[cfg(not(target_os = "windows"))]
use subcommand::check_process;
#[cfg(feature = "with_sentry")]
pub(crate) const LOG_TARGET_SENTRY: &str = "sentry";

/// Print a log-like message to stderr.
/// Format: `YYYY-MM-DD HH:MM:SS.mmm +00:00 thread_name INFO module  message`
fn log_println(message: &str) {
    let now = OffsetDateTime::now_utc();
    let thread = std::thread::current();
    let thread_name = thread.name().unwrap_or("main");
    eprintln!(
        "{:04}-{:02}-{:02} {:02}:{:02}:{:02}.{:03} +00:00 {} INFO ckb_bin  {}",
        now.year(),
        now.month() as u8,
        now.day(),
        now.hour(),
        now.minute(),
        now.second(),
        now.millisecond(),
        thread_name,
        message
    );
}

/// The executable main entry.
///
/// It returns `Ok` when the process exist normally, otherwise the `ExitCode` is converted to the
/// process exit status code.
///
/// ## Parameters
///
/// * `version` - The version is passed in so the bin crate can collect the version without trigger
///   re-linking.
pub fn run_app(version: Version) -> Result<(), ExitCode> {
    // Always print backtrace on panic.
    unsafe {
        ::std::env::set_var("RUST_BACKTRACE", "full");
    }

    let (bin_name, app_matches) = cli::get_bin_name_and_matches(&version);
    if let Some((cli, matches)) = app_matches.subcommand() {
        match cli {
            cli::CMD_INIT => {
                return subcommand::init(Setup::init(matches)?);
            }
            cli::CMD_LIST_HASHES => {
                return subcommand::list_hashes(Setup::root_dir_from_matches(matches)?, matches);
            }
            cli::CMD_PEERID => {
                if let Some((cli, matches)) = matches.subcommand() {
                    match cli {
                        cli::CMD_GEN_SECRET => return Setup::generate(matches),
                        cli::CMD_FROM_SECRET => {
                            return subcommand::peer_id(Setup::peer_id(matches)?);
                        }
                        _ => {}
                    }
                }
            }
            _ => {}
        }
    }

    let (cmd, matches) = app_matches
        .subcommand()
        .expect("SubcommandRequiredElseHelp");

    #[cfg(not(target_os = "windows"))]
    if run_daemon(cmd, matches) {
        return run_app_in_daemon(version, bin_name, cmd, matches);
    }

    debug!("ckb version: {}", version);
    run_app_inner(version, bin_name, cmd, matches)
}

#[cfg(not(target_os = "windows"))]
fn run_app_in_daemon(
    version: Version,
    bin_name: String,
    cmd: &str,
    matches: &ArgMatches,
) -> Result<(), ExitCode> {
    eprintln!("starting CKB in daemon mode ...");
    eprintln!("check status : `{}`", "ckb daemon --check".green());
    eprintln!("stop daemon  : `{}`", "ckb daemon --stop".yellow());

    assert!(matches!(cmd, cli::CMD_RUN));
    let root_dir = Setup::root_dir_from_matches(matches)?;
    let daemon_dir = root_dir.join("data/daemon");
    // make sure daemon dir exists
    std::fs::create_dir_all(daemon_dir)?;
    let pid_file = Setup::daemon_pid_file_path(matches)?;

    if check_process(&pid_file).is_ok() {
        eprintln!("{}", "ckb is already running".red());
        return Ok(());
    }
    eprintln!("no ckb process, starting ...");

    let pwd = std::env::current_dir()?;
    let daemon = Daemon::new().pid_file(pid_file, Some(false)).work_dir(pwd);

    match daemon.start() {
        Ok(_) => {
            ckb_logger::info!("Success, daemonized ...");
            run_app_inner(version, bin_name, cmd, matches)
        }
        Err(e) => {
            ckb_logger::info!("daemonize error: {}", e);
            Err(ExitCode::Failure)
        }
    }
}

fn run_app_inner(
    version: Version,
    bin_name: String,
    cmd: &str,
    matches: &ArgMatches,
) -> Result<(), ExitCode> {
    let is_silent_logging = is_silent_logging(cmd);
    let (mut handle, mut handle_stop_rx, _runtime) = new_global_runtime(None);
    let setup = Setup::from_matches(bin_name, cmd, matches)?;
    // Disable logging here if the user is executing `ckb run`.
    // Logs subscription of RPC service requires access to `struct Shared`,
    // so logger of `ckb run` will be initialized in `subcommand::run`.
    let (_guard, log_config) = SetupGuard::from_setup(
        &setup,
        &version,
        handle.clone(),
        is_silent_logging,
        cmd != cli::CMD_RUN,
    )?;

    raise_fd_limit();

    let ret = match cmd {
        cli::CMD_RUN => subcommand::run(setup.run(matches)?, version, handle.clone(), log_config),
        cli::CMD_MINER => subcommand::miner(setup.miner(matches)?, handle.clone()),
        cli::CMD_REPLAY => subcommand::replay(setup.replay(matches)?, handle.clone()),
        cli::CMD_EXPORT => subcommand::export(setup.export(matches)?, handle.clone()),
        cli::CMD_IMPORT => subcommand::import(setup.import(matches)?, handle.clone()),
        cli::CMD_STATS => subcommand::stats(setup.stats(matches)?, handle.clone()),
        cli::CMD_RESET_DATA => subcommand::reset_data(setup.reset_data(matches)?),
        cli::CMD_MIGRATE => subcommand::migrate(setup.migrate(matches)?),
        #[cfg(not(target_os = "windows"))]
        cli::CMD_DAEMON => subcommand::daemon(setup.daemon(matches)?),
        _ => unreachable!(),
    };

    if matches!(cmd, cli::CMD_RUN) {
        handle.drop_guard();

        tokio::task::block_in_place(|| {
            // Here we use `log_println` instead of `info!` because the Logger has already been
            // shut down when `subcommand::run()` returned (LoggerGuard was dropped there).
            //
            // We cannot simply extend the LoggerGuard's lifetime to here because it would cause
            // a deadlock: NotifyController (held by Logger's background thread) contains a clone
            // of Handle, which holds a clone of `guard` (Sender). If LoggerGuard is not dropped
            // before `handle_stop_rx.blocking_recv()`, the Logger thread won't terminate, and
            // the Sender inside NotifyController won't be dropped, causing blocking_recv() to
            // wait forever.
            log_println("Waiting for all tokio tasks to exit...");
            handle_stop_rx.blocking_recv();
            log_println("All tokio tasks and threads have exited. CKB shutdown");
        });
    }

    ret
}

#[cfg(not(target_os = "windows"))]
fn run_daemon(cmd: &str, matches: &ArgMatches) -> bool {
    match cmd {
        cli::CMD_RUN => matches.get_flag(cli::ARG_DAEMON),
        _ => false,
    }
}

type Silent = bool;

fn is_silent_logging(cmd: &str) -> Silent {
    matches!(
        cmd,
        cli::CMD_EXPORT
            | cli::CMD_IMPORT
            | cli::CMD_STATS
            | cli::CMD_MIGRATE
            | cli::CMD_RESET_DATA
            | cli::CMD_DAEMON
    )
}