| 1 | //! Updates. The app asks g1t.sh/downloads/desktop/latest.json soon after |
| 2 | //! it starts and every six hours after, downloads a newer version in the |
| 3 | //! background, and then says so: a notification, and the tray's "Restart |
| 4 | //! to update". Nothing is installed under someone mid-sentence; the |
| 5 | //! restart, or quitting, installs it. The manifest is signed with g1t's |
| 6 | //! release key, built into the app, and a download whose signature does |
| 7 | //! not check out is thrown away (scripts/desktop-release.mjs). |
| 8 | |
| 9 | use std::time::Duration; |
| 10 | |
| 11 | use tauri::{AppHandle, Emitter, Manager}; |
| 12 | use tauri_plugin_notification::NotificationExt; |
| 13 | use tauri_plugin_updater::{Update, UpdaterExt}; |
| 14 | |
| 15 | use crate::{config, settings, tray}; |
| 16 | |
| 17 | /// An update downloaded and checked, waiting to be installed. |
| 18 | pub struct Ready { |
| 19 | pub version: String, |
| 20 | update: Update, |
| 21 | bytes: Vec<u8>, |
| 22 | } |
| 23 | |
| 24 | const FIRST_CHECK: Duration = Duration::from_secs(15); |
| 25 | const EVERY: Duration = Duration::from_secs(6 * 60 * 60); |
| 26 | |
| 27 | /// Checks soon after the start, then every six hours, unless settings |
| 28 | /// turned that off; a person can still check from the menu. |
| 29 | pub fn schedule(app: AppHandle) { |
| 30 | tauri::async_runtime::spawn(async move { |
| 31 | tokio::time::sleep(FIRST_CHECK).await; |
| 32 | loop { |
| 33 | if config::settings(&app).auto_update { |
| 34 | let _ = check(&app, false).await; |
| 35 | } |
| 36 | tokio::time::sleep(EVERY).await; |
| 37 | } |
| 38 | }); |
| 39 | } |
| 40 | |
| 41 | /// When the updater last heard back, in milliseconds since 1970. |
| 42 | pub fn checked_at(app: &AppHandle) -> Option<u64> { |
| 43 | *app.state::<config::State>().checked_at.lock().unwrap() |
| 44 | } |
| 45 | |
| 46 | fn heard_back(app: &AppHandle) { |
| 47 | let now = std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).map(|since| since.as_millis() as u64).ok(); |
| 48 | *app.state::<config::State>().checked_at.lock().unwrap() = now; |
| 49 | } |
| 50 | |
| 51 | /// The version downloaded and waiting, if one is. |
| 52 | pub fn ready(app: &AppHandle) -> Option<String> { |
| 53 | app.state::<config::State>().update.lock().unwrap().as_ref().map(|ready| ready.version.clone()) |
| 54 | } |
| 55 | |
| 56 | fn tell(app: &AppHandle, title: &str, body: &str) { |
| 57 | let _ = app.notification().builder().title(title).body(body).show(); |
| 58 | } |
| 59 | |
| 60 | /// Looks for an update and downloads it. `asked` is a person asking from |
| 61 | /// the tray or the site, who is told the answer either way; the timer |
| 62 | /// says nothing unless there is something to install. |
| 63 | pub async fn check(app: &AppHandle, asked: bool) -> Result<String, String> { |
| 64 | if let Some(version) = ready(app) { |
| 65 | if asked { |
| 66 | tell(app, "g1t is ready to update", &format!("Version {version} is downloaded. Restart g1t to use it.")); |
| 67 | } |
| 68 | return Ok(format!("ready:{version}")); |
| 69 | } |
| 70 | let updater = app.updater().map_err(|error| error.to_string())?; |
| 71 | let update = match updater.check().await { |
| 72 | Ok(Some(update)) => { |
| 73 | heard_back(app); |
| 74 | update |
| 75 | } |
| 76 | Ok(None) => { |
| 77 | heard_back(app); |
| 78 | if asked { |
| 79 | tell(app, "g1t is up to date", &format!("You have version {}.", env!("CARGO_PKG_VERSION"))); |
| 80 | } |
| 81 | return Ok("current".into()); |
| 82 | } |
| 83 | Err(error) => { |
| 84 | if asked { |
| 85 | tell(app, "g1t could not check for updates", &error.to_string()); |
| 86 | } |
| 87 | return Err(error.to_string()); |
| 88 | } |
| 89 | }; |
| 90 | let version = update.version.clone(); |
| 91 | match update.download(|_, _| {}, || {}).await { |
| 92 | Ok(bytes) => { |
| 93 | *app.state::<config::State>().update.lock().unwrap() = Some(Ready { version: version.clone(), update, bytes }); |
| 94 | tray::update_ready(&version); |
| 95 | let _ = app.emit_to(settings::SETTINGS, settings::READY_EVENT, version.clone()); |
| 96 | tell(app, "g1t is ready to update", &format!("Version {version} is downloaded. Restart g1t from the tray to use it.")); |
| 97 | Ok(format!("ready:{version}")) |
| 98 | } |
| 99 | Err(error) => { |
| 100 | if asked { |
| 101 | tell(app, "The update could not be downloaded", &error.to_string()); |
| 102 | } |
| 103 | Err(error.to_string()) |
| 104 | } |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | /// Installs what is downloaded, if anything. On Windows the installer |
| 109 | /// ends this process itself; elsewhere the caller goes on. |
| 110 | fn install(app: &AppHandle) -> bool { |
| 111 | let ready = app.state::<config::State>().update.lock().unwrap().take(); |
| 112 | let Some(ready) = ready else { return false }; |
| 113 | match ready.update.install(ready.bytes) { |
| 114 | Ok(()) => true, |
| 115 | Err(error) => { |
| 116 | tell(app, "The update could not be installed", &error.to_string()); |
| 117 | false |
| 118 | } |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | /// The tray's restart: installs the update and starts the new version. |
| 123 | /// The runner stops first, since on Windows the installer ends g1t. |
| 124 | pub fn restart(app: &AppHandle) { |
| 125 | if ready(app).is_none() { |
| 126 | return; |
| 127 | } |
| 128 | crate::runner::shutdown(app); |
| 129 | if install(app) { |
| 130 | app.restart(); |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | /// Quit, stopping the runner and installing a downloaded update on the way out. |
| 135 | pub fn quit(app: &AppHandle) { |
| 136 | crate::runner::shutdown(app); |
| 137 | install(app); |
| 138 | app.exit(0); |
| 139 | } |