ZIm/crates/zed/src/main.rs

// Allow binary to be called Zed for a nice application menu when running executable direcly
#![allow(non_snake_case)]

use anyhow::{anyhow, Context, Result};
use assets::Assets;
use cli::{
    ipc::{self, IpcSender},
    CliRequest, CliResponse, IpcHandshake,
};
use client::{self, http, ChannelList, UserStore};
use fs::OpenOptions;
use futures::{
    channel::{mpsc, oneshot},
    FutureExt, SinkExt, StreamExt,
};
use gpui::{App, AssetSource, AsyncAppContext, Task};
use log::LevelFilter;
use parking_lot::Mutex;
use project::Fs;
use settings::{self, KeymapFileContent, Settings, SettingsFileContent};
use smol::process::Command;
use std::{env, fs, path::PathBuf, sync::Arc, thread, time::Duration};
use theme::{ThemeRegistry, DEFAULT_THEME_NAME};
use util::ResultExt;
use workspace::{self, AppState, OpenNew, OpenPaths};
use zed::{
    self, build_window_options, build_workspace,
    fs::RealFs,
    languages, menus,
    settings_file::{settings_from_files, watch_keymap_file, WatchedJsonFile},
};

fn main() {
    init_logger();

    let mut app = gpui::App::new(Assets).unwrap();
    load_embedded_fonts(&app);

    let fs = Arc::new(RealFs);
    let themes = ThemeRegistry::new(Assets, app.font_cache());
    let theme = themes.get(DEFAULT_THEME_NAME).unwrap();
    let default_settings = Settings::new("Zed Mono", &app.font_cache(), theme)
        .unwrap()
        .with_overrides(
            languages::PLAIN_TEXT.name(),
            settings::LanguageOverride {
                soft_wrap: Some(settings::SoftWrap::PreferredLineLength),
                ..Default::default()
            },
        )
        .with_overrides(
            "Markdown",
            settings::LanguageOverride {
                soft_wrap: Some(settings::SoftWrap::PreferredLineLength),
                ..Default::default()
            },
        )
        .with_overrides(
            "Rust",
            settings::LanguageOverride {
                tab_size: Some(4),
                ..Default::default()
            },
        )
        .with_overrides(
            "JavaScript",
            settings::LanguageOverride {
                tab_size: Some(2),
                ..Default::default()
            },
        )
        .with_overrides(
            "TypeScript",
            settings::LanguageOverride {
                tab_size: Some(2),
                ..Default::default()
            },
        )
        .with_overrides(
            "TSX",
            settings::LanguageOverride {
                tab_size: Some(2),
                ..Default::default()
            },
        );

    let config_files = load_config_files(&app, fs.clone());

    let login_shell_env_loaded = if stdout_is_a_pty() {
        Task::ready(())
    } else {
        app.background().spawn(async {
            load_login_shell_environment().await.log_err();
        })
    };

    let (cli_connections_tx, mut cli_connections_rx) = mpsc::unbounded();
    app.on_open_urls(move |urls, _| {
        if let Some(server_name) = urls.first().and_then(|url| url.strip_prefix("zed-cli://")) {
            if let Some(cli_connection) = connect_to_cli(server_name).log_err() {
                cli_connections_tx
                    .unbounded_send(cli_connection)
                    .map_err(|_| anyhow!("no listener for cli connections"))
                    .log_err();
            };
        }
    });

    app.run(move |cx| {
        let http = http::client();
        let client = client::Client::new(http.clone());
        let mut languages = languages::build_language_registry(login_shell_env_loaded);
        let user_store = cx.add_model(|cx| UserStore::new(client.clone(), http.clone(), cx));
        let channel_list =
            cx.add_model(|cx| ChannelList::new(user_store.clone(), client.clone(), cx));

        auto_update::init(http, client::ZED_SERVER_URL.clone(), cx);
        project::Project::init(&client);
        client::Channel::init(&client);
        client::init(client.clone(), cx);
        command_palette::init(cx);
        workspace::init(&client, cx);
        editor::init(cx);
        go_to_line::init(cx);
        file_finder::init(cx);
        chat_panel::init(cx);
        outline::init(cx);
        project_symbols::init(cx);
        project_panel::init(cx);
        diagnostics::init(cx);
        search::init(cx);
        vim::init(cx);
        cx.spawn({
            let client = client.clone();
            |cx| async move {
                if stdout_is_a_pty() {
                    if client::IMPERSONATE_LOGIN.is_some() {
                        client.authenticate_and_connect(false, &cx).await?;
                    }
                } else {
                    if client.has_keychain_credentials(&cx) {
                        client.authenticate_and_connect(true, &cx).await?;
                    }
                }
                Ok::<_, anyhow::Error>(())
            }
        })
        .detach_and_log_err(cx);

        let (settings_file, keymap_file) = cx.background().block(config_files).unwrap();
        let mut settings_rx = settings_from_files(
            default_settings,
            vec![settings_file],
            themes.clone(),
            cx.font_cache().clone(),
        );

        cx.spawn(|cx| watch_keymap_file(keymap_file, cx)).detach();

        let settings = cx.background().block(settings_rx.next()).unwrap();
        cx.spawn(|mut cx| async move {
            while let Some(settings) = settings_rx.next().await {
                cx.update(|cx| {
                    cx.update_global(|s, _| *s = settings);
                    cx.refresh_windows();
                });
            }
        })
        .detach();

        languages.set_language_server_download_dir(zed::ROOT_PATH.clone());
        languages.set_theme(&settings.theme.editor.syntax);
        cx.set_global(settings);

        let app_state = Arc::new(AppState {
            languages: Arc::new(languages),
            themes,
            channel_list,
            client,
            user_store,
            fs,
            build_window_options,
            build_workspace,
        });
        journal::init(app_state.clone(), cx);
        theme_selector::init(cx);
        zed::init(&app_state, cx);

        cx.set_menus(menus::menus(&app_state.clone()));

        if stdout_is_a_pty() {
            cx.platform().activate(true);
            let paths = collect_path_args();
            if paths.is_empty() {
                cx.dispatch_global_action(OpenNew(app_state.clone()));
            } else {
                cx.dispatch_global_action(OpenPaths { paths, app_state });
            }
        } else {
            if let Ok(Some(connection)) = cli_connections_rx.try_next() {
                cx.spawn(|cx| handle_cli_connection(connection, app_state.clone(), cx))
                    .detach();
            } else {
                cx.dispatch_global_action(OpenNew(app_state.clone()));
            }
            cx.spawn(|cx| async move {
                while let Some(connection) = cli_connections_rx.next().await {
                    handle_cli_connection(connection, app_state.clone(), cx.clone()).await;
                }
            })
            .detach();
        }
    });
}

fn init_logger() {
    if stdout_is_a_pty() {
        env_logger::init();
    } else {
        let level = LevelFilter::Info;
        let log_dir_path = dirs::home_dir()
            .expect("could not locate home directory for logging")
            .join("Library/Logs/");
        let log_file_path = log_dir_path.join("Zed.log");
        fs::create_dir_all(&log_dir_path).expect("could not create log directory");
        let log_file = OpenOptions::new()
            .create(true)
            .append(true)
            .open(log_file_path)
            .expect("could not open logfile");
        simplelog::WriteLogger::init(level, simplelog::Config::default(), log_file)
            .expect("could not initialize logger");
        log_panics::init();
    }
}

async fn load_login_shell_environment() -> Result<()> {
    let marker = "ZED_LOGIN_SHELL_START";
    let shell = env::var("SHELL").context(
        "SHELL environment variable is not assigned so we can't source login environment variables",
    )?;
    let output = Command::new(&shell)
        .args(["-lic", &format!("echo {marker} && /usr/bin/env")])
        .output()
        .await
        .context("failed to spawn login shell to source login environment variables")?;
    if !output.status.success() {
        Err(anyhow!("login shell exited with error"))?;
    }

    let stdout = String::from_utf8_lossy(&output.stdout);

    if let Some(env_output_start) = stdout.find(marker) {
        let env_output = &stdout[env_output_start + marker.len()..];
        for line in env_output.lines() {
            if let Some(separator_index) = line.find('=') {
                let key = &line[..separator_index];
                let value = &line[separator_index + 1..];
                env::set_var(key, value);
            }
        }
        log::info!(
            "set environment variables from shell:{}, path:{}",
            shell,
            env::var("PATH").unwrap_or_default(),
        );
    }

    Ok(())
}

fn stdout_is_a_pty() -> bool {
    unsafe { libc::isatty(libc::STDOUT_FILENO as i32) != 0 }
}

fn collect_path_args() -> Vec<PathBuf> {
    env::args()
        .skip(1)
        .filter_map(|arg| match fs::canonicalize(arg) {
            Ok(path) => Some(path),
            Err(error) => {
                log::error!("error parsing path argument: {}", error);
                None
            }
        })
        .collect::<Vec<_>>()
}

fn load_embedded_fonts(app: &App) {
    let font_paths = Assets.list("fonts");
    let embedded_fonts = Mutex::new(Vec::new());
    smol::block_on(app.background().scoped(|scope| {
        for font_path in &font_paths {
            scope.spawn(async {
                let font_path = &*font_path;
                let font_bytes = Assets.load(&font_path).unwrap().to_vec();
                embedded_fonts.lock().push(Arc::from(font_bytes));
            });
        }
    }));
    app.platform()
        .fonts()
        .add_fonts(&embedded_fonts.into_inner())
        .unwrap();
}

fn load_config_files(
    app: &App,
    fs: Arc<dyn Fs>,
) -> oneshot::Receiver<(
    WatchedJsonFile<SettingsFileContent>,
    WatchedJsonFile<KeymapFileContent>,
)> {
    let executor = app.background();
    let (tx, rx) = oneshot::channel();
    executor
        .clone()
        .spawn(async move {
            let settings_file =
                WatchedJsonFile::new(fs.clone(), &executor, zed::SETTINGS_PATH.clone()).await;
            let keymap_file = WatchedJsonFile::new(fs, &executor, zed::KEYMAP_PATH.clone()).await;
            tx.send((settings_file, keymap_file)).ok()
        })
        .detach();
    rx
}

fn connect_to_cli(
    server_name: &str,
) -> Result<(mpsc::Receiver<CliRequest>, IpcSender<CliResponse>)> {
    let handshake_tx = cli::ipc::IpcSender::<IpcHandshake>::connect(server_name.to_string())
        .context("error connecting to cli")?;
    let (request_tx, request_rx) = ipc::channel::<CliRequest>()?;
    let (response_tx, response_rx) = ipc::channel::<CliResponse>()?;

    handshake_tx
        .send(IpcHandshake {
            requests: request_tx,
            responses: response_rx,
        })
        .context("error sending ipc handshake")?;

    let (mut async_request_tx, async_request_rx) =
        futures::channel::mpsc::channel::<CliRequest>(16);
    thread::spawn(move || {
        while let Ok(cli_request) = request_rx.recv() {
            if smol::block_on(async_request_tx.send(cli_request)).is_err() {
                break;
            }
        }
        Ok::<_, anyhow::Error>(())
    });

    Ok((async_request_rx, response_tx))
}

async fn handle_cli_connection(
    (mut requests, responses): (mpsc::Receiver<CliRequest>, IpcSender<CliResponse>),
    app_state: Arc<AppState>,
    mut cx: AsyncAppContext,
) {
    if let Some(request) = requests.next().await {
        match request {
            CliRequest::Open { paths, wait } => {
                let (workspace, items) = cx
                    .update(|cx| workspace::open_paths(&paths, &app_state, cx))
                    .await;

                let mut errored = false;
                let mut futures = Vec::new();
                cx.update(|cx| {
                    for (item, path) in items.into_iter().zip(&paths) {
                        match item {
                            Some(Ok(item)) => {
                                let released = oneshot::channel();
                                item.on_release(
                                    cx,
                                    Box::new(move |_| {
                                        let _ = released.0.send(());
                                    }),
                                )
                                .detach();
                                futures.push(released.1);
                            }
                            Some(Err(err)) => {
                                responses
                                    .send(CliResponse::Stderr {
                                        message: format!("error opening {:?}: {}", path, err),
                                    })
                                    .log_err();
                                errored = true;
                            }
                            None => {}
                        }
                    }
                });

                if wait {
                    let background = cx.background();
                    let wait = async move {
                        if paths.is_empty() {
                            let (done_tx, done_rx) = oneshot::channel();
                            let _subscription = cx.update(|cx| {
                                cx.observe_release(&workspace, move |_, _| {
                                    let _ = done_tx.send(());
                                })
                            });
                            drop(workspace);
                            let _ = done_rx.await;
                        } else {
                            let _ = futures::future::try_join_all(futures).await;
                        };
                    }
                    .fuse();
                    futures::pin_mut!(wait);

                    loop {
                        // Repeatedly check if CLI is still open to avoid wasting resources
                        // waiting for files or workspaces to close.
                        let mut timer = background.timer(Duration::from_secs(1)).fuse();
                        futures::select_biased! {
                            _ = wait => break,
                            _ = timer => {
                                if responses.send(CliResponse::Ping).is_err() {
                                    break;
                                }
                            }
                        }
                    }
                }

                responses
                    .send(CliResponse::Exit {
                        status: if errored { 1 } else { 0 },
                    })
                    .log_err();
            }
        }
    }
}