lsp: Check if language server supports workspace/symbol request (#27491)

This ensures that we do not get a bunch of error logs when using the
symbol search:
```
[2025-03-26T13:23:32+01:00 ERROR project] Method not found
[2025-03-26T13:23:32+01:00 ERROR project] Method not found
[2025-03-26T13:23:32+01:00 ERROR project] Method not found
[2025-03-26T13:23:32+01:00 ERROR project] Method not found
[2025-03-26T13:23:32+01:00 ERROR project] Method not found
[2025-03-26T13:23:33+01:00 ERROR project] Method not found
...
```

Release Notes:

- N/A

crates/collab/src/tests/integration_tests.rs

@@ -26,7 +26,7 @@ use language::{
     tree_sitter_rust, tree_sitter_typescript, Diagnostic, DiagnosticEntry, FakeLspAdapter,
     Language, LanguageConfig, LanguageMatcher, LineEnding, OffsetRangeExt, Point, Rope,
 };
-use lsp::LanguageServerId;
+use lsp::{LanguageServerId, OneOf};
 use parking_lot::Mutex;
 use pretty_assertions::assert_eq;
 use project::{
@@ -5399,9 +5399,16 @@ async fn test_project_symbols(
     let active_call_a = cx_a.read(ActiveCall::global);
 
     client_a.language_registry().add(rust_lang());
-    let mut fake_language_servers = client_a
+    let mut fake_language_servers = client_a.language_registry().register_fake_lsp(
-        .language_registry()
+        "Rust",
-        .register_fake_lsp("Rust", Default::default());
+        FakeLspAdapter {
+            capabilities: lsp::ServerCapabilities {
+                workspace_symbol_provider: Some(OneOf::Left(true)),
+                ..Default::default()
+            },
+            ..Default::default()
+        },
+    );
 
     client_a
         .fs()

crates/lsp/src/lsp.rs

@@ -1483,6 +1483,7 @@ impl LanguageServer {
             document_formatting_provider: Some(OneOf::Left(true)),
             document_range_formatting_provider: Some(OneOf::Left(true)),
             definition_provider: Some(OneOf::Left(true)),
+            workspace_symbol_provider: Some(OneOf::Left(true)),
             implementation_provider: Some(ImplementationProviderCapability::Simple(true)),
             type_definition_provider: Some(TypeDefinitionProviderCapability::Simple(true)),
             ..Default::default()

crates/project/src/lsp_store.rs

@@ -5791,48 +5791,57 @@ impl LspStore {
 
                         _ => continue 'next_server,
                     };
+                    let supports_workspace_symbol_request =
+                        match server.capabilities().workspace_symbol_provider {
+                            Some(OneOf::Left(supported)) => supported,
+                            Some(OneOf::Right(_)) => true,
+                            None => false,
+                        };
+                    if !supports_workspace_symbol_request {
+                        continue 'next_server;
+                    }
                     let worktree_abs_path = worktree.abs_path().clone();
                     let worktree_handle = worktree_handle.clone();
                     let server_id = server.server_id();
                     requests.push(
-                            server
+                        server
-                                .request::<lsp::request::WorkspaceSymbolRequest>(
+                            .request::<lsp::request::WorkspaceSymbolRequest>(
-                                    lsp::WorkspaceSymbolParams {
+                                lsp::WorkspaceSymbolParams {
-                                        query: query.to_string(),
+                                    query: query.to_string(),
-                                        ..Default::default()
+                                    ..Default::default()
-                                    },
+                                },
-                                )
+                            )
-                                .log_err()
+                            .log_err()
-                                .map(move |response| {
+                            .map(move |response| {
-                                    let lsp_symbols = response.flatten().map(|symbol_response| match symbol_response {
+                                let lsp_symbols = response.flatten().map(|symbol_response| match symbol_response {
-                                        lsp::WorkspaceSymbolResponse::Flat(flat_responses) => {
+                                    lsp::WorkspaceSymbolResponse::Flat(flat_responses) => {
-                                            flat_responses.into_iter().map(|lsp_symbol| {
+                                        flat_responses.into_iter().map(|lsp_symbol| {
-                                            (lsp_symbol.name, lsp_symbol.kind, lsp_symbol.location)
+                                        (lsp_symbol.name, lsp_symbol.kind, lsp_symbol.location)
-                                            }).collect::<Vec<_>>()
+                                        }).collect::<Vec<_>>()
-                                        }
-                                        lsp::WorkspaceSymbolResponse::Nested(nested_responses) => {
-                                            nested_responses.into_iter().filter_map(|lsp_symbol| {
-                                                let location = match lsp_symbol.location {
-                                                    OneOf::Left(location) => location,
-                                                    OneOf::Right(_) => {
-                                                        log::error!("Unexpected: client capabilities forbid symbol resolutions in workspace.symbol.resolveSupport");
-                                                        return None
-                                                    }
-                                                };
-                                                Some((lsp_symbol.name, lsp_symbol.kind, location))
-                                            }).collect::<Vec<_>>()
-                                        }
-                                    }).unwrap_or_default();
-
-                                    WorkspaceSymbolsResult {
-                                        server_id,
-                                        lsp_adapter,
-                                        worktree: worktree_handle.downgrade(),
-                                        worktree_abs_path,
-                                        lsp_symbols,
                                     }
-                                }),
+                                    lsp::WorkspaceSymbolResponse::Nested(nested_responses) => {
-                        );
+                                        nested_responses.into_iter().filter_map(|lsp_symbol| {
+                                            let location = match lsp_symbol.location {
+                                                OneOf::Left(location) => location,
+                                                OneOf::Right(_) => {
+                                                    log::error!("Unexpected: client capabilities forbid symbol resolutions in workspace.symbol.resolveSupport");
+                                                    return None
+                                                }
+                                            };
+                                            Some((lsp_symbol.name, lsp_symbol.kind, location))
+                                        }).collect::<Vec<_>>()
+                                    }
+                                }).unwrap_or_default();
+
+                                WorkspaceSymbolsResult {
+                                    server_id,
+                                    lsp_adapter,
+                                    worktree: worktree_handle.downgrade(),
+                                    worktree_abs_path,
+                                    lsp_symbols,
+                                }
+                            }),
+                    );
                 }
                 requested_servers.append(&mut servers_to_query);
             }

crates/project_symbols/src/project_symbols.rs

@@ -270,6 +270,7 @@ mod tests {
     use futures::StreamExt;
     use gpui::{SemanticVersion, TestAppContext, VisualContext};
     use language::{FakeLspAdapter, Language, LanguageConfig, LanguageMatcher};
+    use lsp::OneOf;
     use project::FakeFs;
     use serde_json::json;
     use settings::SettingsStore;
@@ -298,8 +299,16 @@ mod tests {
             },
             None,
         )));
-        let mut fake_servers =
+        let mut fake_servers = language_registry.register_fake_lsp(
-            language_registry.register_fake_lsp("Rust", FakeLspAdapter::default());
+            "Rust",
+            FakeLspAdapter {
+                capabilities: lsp::ServerCapabilities {
+                    workspace_symbol_provider: Some(OneOf::Left(true)),
+                    ..Default::default()
+                },
+                ..Default::default()
+            },
+        );
 
         let _buffer = project
             .update(cx, |project, cx| {