Show message indicating when we're downloading language servers

Co-Authored-By: Nathan Sobo <nathan@zed.dev>

crates/zed/src/language.rs

@@ -2,6 +2,7 @@ use anyhow::anyhow;
 use async_compression::futures::bufread::GzipDecoder;
 use client::http;
 use futures::{future::BoxFuture, FutureExt, StreamExt};
+use gpui::executor;
 pub use language::*;
 use lazy_static::lazy_static;
 use regex::Regex;
@@ -45,7 +46,7 @@ impl RustLsp {
             .ok_or_else(|| anyhow!("no release found matching {:?}", release_name))?;
 
         let destination_path = destination_dir_path.join(format!("rust-analyzer-{}", release.name));
-        if fs::metadata(&destination_path).await.is_ok() {
+        if fs::metadata(&destination_path).await.is_err() {
             let response = client
                 .get(&asset.browser_download_url)
                 .send()
@@ -195,10 +196,10 @@ impl LspExt for RustLsp {
     }
 }
 
-pub fn build_language_registry() -> LanguageRegistry {
-    let mut languages = LanguageRegistry::default();
-    languages.add(Arc::new(rust()));
-    languages.add(Arc::new(markdown()));
+pub fn build_language_registry(executor: &Arc<executor::Background>) -> LanguageRegistry {
+    let mut languages = LanguageRegistry::new();
+    languages.add(Arc::new(rust()), executor);
+    languages.add(Arc::new(markdown()), executor);
     languages
 }
 

crates/zed/src/main.rs

@@ -39,7 +39,7 @@ fn main() {
             },
         );
     let (settings_tx, settings) = postage::watch::channel_with(settings);
-    let languages = Arc::new(language::build_language_registry());
+    let languages = Arc::new(language::build_language_registry(&app.background()));
     languages.set_theme(&settings.borrow().theme.editor.syntax);
 
     app.run(move |cx| {

crates/zed/src/test.rs

@@ -26,14 +26,17 @@ pub fn test_app_state(cx: &mut MutableAppContext) -> Arc<AppState> {
     let client = Client::new(http.clone());
     let user_store = cx.add_model(|cx| UserStore::new(client.clone(), http, cx));
     let mut languages = LanguageRegistry::new();
-    languages.add(Arc::new(language::Language::new(
-        language::LanguageConfig {
-            name: "Rust".to_string(),
-            path_suffixes: vec!["rs".to_string()],
-            ..Default::default()
-        },
-        Some(tree_sitter_rust::language()),
-    )));
+    languages.add(
+        Arc::new(language::Language::new(
+            language::LanguageConfig {
+                name: "Rust".to_string(),
+                path_suffixes: vec!["rs".to_string()],
+                ..Default::default()
+            },
+            Some(tree_sitter_rust::language()),
+        )),
+        cx.background(),
+    );
     Arc::new(AppState {
         settings_tx: Arc::new(Mutex::new(settings_tx)),
         settings,

crates/zed/src/zed.rs

@@ -97,11 +97,19 @@ pub fn build_workspace(
             cx,
         )
     });
+    let lsp_status = cx.add_view(|cx| {
+        workspace::lsp_status::LspStatus::new(
+            app_state.languages.clone(),
+            app_state.settings.clone(),
+            cx,
+        )
+    });
     let cursor_position =
         cx.add_view(|_| editor::items::CursorPosition::new(app_state.settings.clone()));
     workspace.status_bar().update(cx, |status_bar, cx| {
         status_bar.add_left_item(diagnostic_summary, cx);
         status_bar.add_left_item(diagnostic_message, cx);
+        status_bar.add_left_item(lsp_status, cx);
         status_bar.add_right_item(cursor_position, cx);
     });