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+// Copyright 2016 Joe Wilm, The Alacritty Project Contributors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+//! Alacritty - The GPU Enhanced Terminal
+#![deny(clippy::all, clippy::if_not_else, clippy::enum_glob_use, clippy::wrong_pub_self_convention)]
+#![cfg_attr(feature = "nightly", feature(core_intrinsics))]
+#![cfg_attr(all(test, feature = "bench"), feature(test))]
+// With the default subsystem, 'console', windows creates an additional console
+// window for the program.
+// This is silently ignored on non-windows systems.
+// See https://msdn.microsoft.com/en-us/library/4cc7ya5b.aspx for more details.
+#![windows_subsystem = "windows"]
+
+#[cfg(target_os = "macos")]
+use dirs;
+
+#[cfg(windows)]
+use winapi::um::wincon::{AttachConsole, FreeConsole, ATTACH_PARENT_PROCESS};
+
+use log::{error, info};
+
+use std::error::Error;
+use std::fs;
+use std::io::{self, Write};
+use std::sync::Arc;
+
+#[cfg(target_os = "macos")]
+use std::env;
+
+#[cfg(not(windows))]
+use std::os::unix::io::AsRawFd;
+
+use alacritty_terminal::config::{self, Config, Monitor};
+use alacritty_terminal::display::Display;
+use alacritty_terminal::event_loop::{self, EventLoop, Msg};
+#[cfg(target_os = "macos")]
+use alacritty_terminal::locale;
+use alacritty_terminal::message_bar::MessageBuffer;
+use alacritty_terminal::panic;
+use alacritty_terminal::sync::FairMutex;
+use alacritty_terminal::term::Term;
+use alacritty_terminal::tty;
+use alacritty_terminal::util::fmt::Red;
+use alacritty_terminal::{cli, die, event};
+
+mod logging;
+
+fn main() {
+ panic::attach_handler();
+
+ // When linked with the windows subsystem windows won't automatically attach
+ // to the console of the parent process, so we do it explicitly. This fails
+ // silently if the parent has no console.
+ #[cfg(windows)]
+ unsafe {
+ AttachConsole(ATTACH_PARENT_PROCESS);
+ }
+
+ // Load command line options
+ let options = cli::Options::load();
+
+ // Setup storage for message UI
+ let message_buffer = MessageBuffer::new();
+
+ // Initialize the logger as soon as possible as to capture output from other subsystems
+ let log_file =
+ logging::initialize(&options, message_buffer.tx()).expect("Unable to initialize logger");
+
+ // Load configuration file
+ // If the file is a command line argument, we won't write a generated default file
+ let config_path = options
+ .config_path()
+ .or_else(Config::installed_config)
+ .or_else(|| Config::write_defaults().ok())
+ .map(|path| path.to_path_buf());
+ let config = if let Some(path) = config_path {
+ Config::load_from(path).update_dynamic_title(&options)
+ } else {
+ error!("Unable to write the default config");
+ Config::default()
+ };
+
+ // Switch to home directory
+ #[cfg(target_os = "macos")]
+ env::set_current_dir(dirs::home_dir().unwrap()).unwrap();
+ // Set locale
+ #[cfg(target_os = "macos")]
+ locale::set_locale_environment();
+
+ // Store if log file should be deleted before moving config
+ let persistent_logging = options.persistent_logging || config.persistent_logging();
+
+ // Run alacritty
+ if let Err(err) = run(config, &options, message_buffer) {
+ die!("Alacritty encountered an unrecoverable error:\n\n\t{}\n", Red(err));
+ }
+
+ // Clean up logfile
+ if let Some(log_file) = log_file {
+ if !persistent_logging && fs::remove_file(&log_file).is_ok() {
+ let _ = writeln!(io::stdout(), "Deleted log file at {:?}", log_file);
+ }
+ }
+}
+
+/// Run Alacritty
+///
+/// Creates a window, the terminal state, pty, I/O event loop, input processor,
+/// config change monitor, and runs the main display loop.
+fn run(
+ mut config: Config,
+ options: &cli::Options,
+ message_buffer: MessageBuffer,
+) -> Result<(), Box<dyn Error>> {
+ info!("Welcome to Alacritty");
+ if let Some(config_path) = config.path() {
+ info!("Configuration loaded from {:?}", config_path.display());
+ };
+
+ // Set environment variables
+ tty::setup_env(&config);
+
+ // Create a display.
+ //
+ // The display manages a window and can draw the terminal
+ let mut display = Display::new(&config, options)?;
+
+ info!("PTY Dimensions: {:?} x {:?}", display.size().lines(), display.size().cols());
+
+ // Create the terminal
+ //
+ // This object contains all of the state about what's being displayed. It's
+ // wrapped in a clonable mutex since both the I/O loop and display need to
+ // access it.
+ let terminal = Term::new(&config, display.size().to_owned(), message_buffer);
+ let terminal = Arc::new(FairMutex::new(terminal));
+
+ // Find the window ID for setting $WINDOWID
+ let window_id = display.get_window_id();
+
+ // Create the pty
+ //
+ // The pty forks a process to run the shell on the slave side of the
+ // pseudoterminal. A file descriptor for the master side is retained for
+ // reading/writing to the shell.
+ let pty = tty::new(&config, options, &display.size(), window_id);
+
+ // Get a reference to something that we can resize
+ //
+ // This exists because rust doesn't know the interface is thread-safe
+ // and we need to be able to resize the PTY from the main thread while the IO
+ // thread owns the EventedRW object.
+ #[cfg(windows)]
+ let mut resize_handle = pty.resize_handle();
+ #[cfg(not(windows))]
+ let mut resize_handle = pty.fd.as_raw_fd();
+
+ // Create the pseudoterminal I/O loop
+ //
+ // pty I/O is ran on another thread as to not occupy cycles used by the
+ // renderer and input processing. Note that access to the terminal state is
+ // synchronized since the I/O loop updates the state, and the display
+ // consumes it periodically.
+ let event_loop =
+ EventLoop::new(Arc::clone(&terminal), display.notifier(), pty, options.ref_test);
+
+ // The event loop channel allows write requests from the event processor
+ // to be sent to the loop and ultimately written to the pty.
+ let loop_tx = event_loop.channel();
+
+ // Event processor
+ //
+ // Need the Rc<RefCell<_>> here since a ref is shared in the resize callback
+ let mut processor = event::Processor::new(
+ event_loop::Notifier(event_loop.channel()),
+ display.resize_channel(),
+ options,
+ &config,
+ options.ref_test,
+ display.size().to_owned(),
+ );
+
+ // Create a config monitor when config was loaded from path
+ //
+ // The monitor watches the config file for changes and reloads it. Pending
+ // config changes are processed in the main loop.
+ let config_monitor = match (options.live_config_reload, config.live_config_reload()) {
+ // Start monitor if CLI flag says yes
+ (Some(true), _) |
+ // Or if no CLI flag was passed and the config says yes
+ (None, true) => config.path()
+ .map(|path| config::Monitor::new(path, display.notifier())),
+ // Otherwise, don't start the monitor
+ _ => None,
+ };
+
+ // Kick off the I/O thread
+ let _io_thread = event_loop.spawn(None);
+
+ info!("Initialisation complete");
+
+ // Main display loop
+ loop {
+ // Process input and window events
+ let mut terminal_lock = processor.process_events(&terminal, display.window());
+
+ // Handle config reloads
+ if let Some(ref path) = config_monitor.as_ref().and_then(Monitor::pending) {
+ // Clear old config messages from bar
+ terminal_lock.message_buffer_mut().remove_topic(config::SOURCE_FILE_PATH);
+
+ if let Ok(new_config) = Config::reload_from(path) {
+ config = new_config.update_dynamic_title(options);
+ display.update_config(&config);
+ processor.update_config(&config);
+ terminal_lock.update_config(&config);
+ }
+
+ terminal_lock.dirty = true;
+ }
+
+ // Begin shutdown if the flag was raised
+ if terminal_lock.should_exit() || tty::process_should_exit() {
+ break;
+ }
+
+ // Maybe draw the terminal
+ if terminal_lock.needs_draw() {
+ // Try to update the position of the input method editor
+ #[cfg(not(windows))]
+ display.update_ime_position(&terminal_lock);
+
+ // Handle pending resize events
+ //
+ // The second argument is a list of types that want to be notified
+ // of display size changes.
+ display.handle_resize(&mut terminal_lock, &config, &mut resize_handle, &mut processor);
+
+ drop(terminal_lock);
+
+ // Draw the current state of the terminal
+ display.draw(&terminal, &config);
+ }
+ }
+
+ loop_tx.send(Msg::Shutdown).expect("Error sending shutdown to event loop");
+
+ // FIXME patch notify library to have a shutdown method
+ // config_reloader.join().ok();
+
+ // Without explicitly detaching the console cmd won't redraw it's prompt
+ #[cfg(windows)]
+ unsafe {
+ FreeConsole();
+ }
+
+ info!("Goodbye");
+
+ Ok(())
+}