windows: Implement AutoUpdater (#25734)

Part of #24800



https://github.com/user-attachments/assets/e70d594e-3635-4f93-9073-5abf7e9d2b20



Release Notes:

- N/A

crates/auto_update_helper/src/auto_update_helper.rs

@@ -0,0 +1,94 @@
+#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
+
+#[cfg(target_os = "windows")]
+mod dialog;
+#[cfg(target_os = "windows")]
+mod updater;
+
+#[cfg(target_os = "windows")]
+fn main() {
+    if let Err(e) = windows_impl::run() {
+        log::error!("Error: Zed update failed, {:?}", e);
+        windows_impl::show_error(format!("Error: {:?}", e));
+    }
+}
+
+#[cfg(not(target_os = "windows"))]
+fn main() {}
+
+#[cfg(target_os = "windows")]
+mod windows_impl {
+    use std::path::Path;
+
+    use super::dialog::create_dialog_window;
+    use super::updater::perform_update;
+    use anyhow::{Context, Result};
+    use windows::{
+        Win32::{
+            Foundation::{HWND, LPARAM, WPARAM},
+            UI::WindowsAndMessaging::{
+                DispatchMessageW, GetMessageW, MB_ICONERROR, MB_SYSTEMMODAL, MSG, MessageBoxW,
+                PostMessageW, WM_USER,
+            },
+        },
+        core::HSTRING,
+    };
+
+    pub(crate) const WM_JOB_UPDATED: u32 = WM_USER + 1;
+    pub(crate) const WM_TERMINATE: u32 = WM_USER + 2;
+
+    pub(crate) fn run() -> Result<()> {
+        let helper_dir = std::env::current_exe()?
+            .parent()
+            .context("No parent directory")?
+            .to_path_buf();
+        init_log(&helper_dir)?;
+        let app_dir = helper_dir
+            .parent()
+            .context("No parent directory")?
+            .to_path_buf();
+
+        log::info!("======= Starting Zed update =======");
+        let (tx, rx) = std::sync::mpsc::channel();
+        let hwnd = create_dialog_window(rx)?.0 as isize;
+        std::thread::spawn(move || {
+            let result = perform_update(app_dir.as_path(), Some(hwnd));
+            tx.send(result).ok();
+            unsafe { PostMessageW(Some(HWND(hwnd as _)), WM_TERMINATE, WPARAM(0), LPARAM(0)) }.ok();
+        });
+        unsafe {
+            let mut message = MSG::default();
+            while GetMessageW(&mut message, None, 0, 0).as_bool() {
+                DispatchMessageW(&message);
+            }
+        }
+        Ok(())
+    }
+
+    fn init_log(helper_dir: &Path) -> Result<()> {
+        simplelog::WriteLogger::init(
+            simplelog::LevelFilter::Info,
+            simplelog::Config::default(),
+            std::fs::File::options()
+                .append(true)
+                .create(true)
+                .open(helper_dir.join("auto_update_helper.log"))?,
+        )?;
+        Ok(())
+    }
+
+    pub(crate) fn show_error(mut content: String) {
+        if content.len() > 600 {
+            content.truncate(600);
+            content.push_str("...\n");
+        }
+        let _ = unsafe {
+            MessageBoxW(
+                None,
+                &HSTRING::from(content),
+                windows::core::w!("Error: Zed update failed."),
+                MB_ICONERROR | MB_SYSTEMMODAL,
+            )
+        };
+    }
+}