Reduce feature flags

crates/rust-analyzer/src/config.rs

@@ -9,24 +9,35 @@
 
 use rustc_hash::FxHashMap;
 
+use crate::feature_flags::FeatureFlags;
 use lsp_types::TextDocumentClientCapabilities;
 use ra_flycheck::FlycheckConfig;
-use ra_ide::InlayHintsConfig;
+use ra_ide::{CompletionConfig, InlayHintsConfig};
 use ra_project_model::CargoFeatures;
 use serde::{Deserialize, Deserializer};
 
 #[derive(Debug, Clone)]
 pub struct Config {
     pub publish_decorations: bool,
+    pub publish_diagnostics: bool,
+    pub notifications: NotificationsConfig,
     pub supports_location_link: bool,
     pub line_folding_only: bool,
     pub inlay_hints: InlayHintsConfig,
+    pub completion: CompletionConfig,
+    pub call_info_full: bool,
     pub rustfmt: RustfmtConfig,
     pub check: Option<FlycheckConfig>,
     pub vscode_lldb: bool,
     pub proc_macro_srv: Option<String>,
 }
 
+#[derive(Debug, Clone)]
+pub struct NotificationsConfig {
+    pub workspace_loaded: bool,
+    pub cargo_toml_not_found: bool,
+}
+
 #[derive(Debug, Clone)]
 pub enum RustfmtConfig {
     Rustfmt {
@@ -49,8 +60,14 @@ pub(crate) fn get_config(
     config: &ServerConfig,
     text_document_caps: Option<&TextDocumentClientCapabilities>,
 ) -> Config {
+    let feature_flags = get_feature_flags(config);
     Config {
         publish_decorations: config.publish_decorations,
+        publish_diagnostics: feature_flags.get("lsp.diagnostics"),
+        notifications: NotificationsConfig {
+            workspace_loaded: feature_flags.get("notifications.workspace-loaded"),
+            cargo_toml_not_found: feature_flags.get("notifications.cargo-toml-not-found"),
+        },
         supports_location_link: text_document_caps
             .and_then(|it| it.definition)
             .and_then(|it| it.link_support)
@@ -65,6 +82,13 @@ pub(crate) fn get_config(
             chaining_hints: config.inlay_hints_chaining,
             max_length: config.inlay_hints_max_length,
         },
+        completion: CompletionConfig {
+            enable_postfix_completions: feature_flags.get("completion.enable-postfix"),
+            add_call_parenthesis: feature_flags.get("completion.insertion.add-call-parenthesis"),
+            add_call_argument_snippets: feature_flags
+                .get("completion.insertion.add-argument-snippets"),
+        },
+        call_info_full: feature_flags.get("call-info.full"),
         check: if config.cargo_watch_enable {
             Some(FlycheckConfig::CargoCommand {
                 command: config.cargo_watch_command.clone(),
@@ -80,6 +104,17 @@ pub(crate) fn get_config(
     }
 }
 
+fn get_feature_flags(config: &ServerConfig) -> FeatureFlags {
+    let mut ff = FeatureFlags::default();
+    for (flag, &value) in &config.feature_flags {
+        if ff.set(flag.as_str(), value).is_err() {
+            log::error!("unknown feature flag: {:?}", flag);
+        }
+    }
+    log::info!("feature_flags: {:#?}", ff);
+    ff
+}
+
 /// Client provided initialization options
 #[derive(Deserialize, Clone, Debug, PartialEq, Eq)]
 #[serde(rename_all = "camelCase", default)]

crates/rust-analyzer/src/main_loop.rs

@@ -33,7 +33,6 @@ use threadpool::ThreadPool;
 use crate::{
     config::get_config,
     diagnostics::DiagnosticTask,
-    feature_flags::FeatureFlags,
     main_loop::{
         pending_requests::{PendingRequest, PendingRequests},
         subscriptions::Subscriptions,
@@ -66,22 +65,6 @@ impl fmt::Display for LspError {
 
 impl Error for LspError {}
 
-fn get_feature_flags(config: &ServerConfig, connection: &Connection) -> FeatureFlags {
-    let mut ff = FeatureFlags::default();
-    for (flag, &value) in &config.feature_flags {
-        if ff.set(flag.as_str(), value).is_err() {
-            log::error!("unknown feature flag: {:?}", flag);
-            show_message(
-                req::MessageType::Error,
-                format!("unknown feature flag: {:?}", flag),
-                &connection.sender,
-            );
-        }
-    }
-    log::info!("feature_flags: {:#?}", ff);
-    ff
-}
-
 pub fn main_loop(
     ws_roots: Vec<PathBuf>,
     client_caps: ClientCapabilities,
@@ -112,8 +95,8 @@ pub fn main_loop(
     let text_document_caps = client_caps.text_document.as_ref();
     let mut loop_state = LoopState::default();
     let mut world_state = {
-        let feature_flags = get_feature_flags(&config, &connection);
-
+        // TODO: refactor
+        let new_config = get_config(&config, text_document_caps);
         // FIXME: support dynamic workspace loading.
         let workspaces = {
             let mut loaded_workspaces = Vec::new();
@@ -131,7 +114,7 @@ pub fn main_loop(
                         if let Some(ra_project_model::CargoTomlNotFoundError { .. }) =
                             e.downcast_ref()
                         {
-                            if !feature_flags.get("notifications.cargo-toml-not-found") {
+                            if !new_config.notifications.cargo_toml_not_found {
                                 continue;
                             }
                         }
@@ -180,8 +163,7 @@ pub fn main_loop(
             config.lru_capacity,
             &globs,
             Watch(!config.use_client_watching),
-            get_config(&config, text_document_caps),
-            feature_flags,
+            new_config,
         )
     };
 
@@ -406,7 +388,6 @@ fn loop_turn(
                             world_state.update_configuration(
                                 new_config.lru_capacity,
                                 get_config(&new_config, text_document_caps),
-                                get_feature_flags(&new_config, connection),
                             );
                         }
                         (None, Some(Err(e))) => {
@@ -441,8 +422,8 @@ fn loop_turn(
         });
     }
 
-    let show_progress = !loop_state.workspace_loaded
-        && world_state.feature_flags.get("notifications.workspace-loaded");
+    let show_progress =
+        !loop_state.workspace_loaded && world_state.config.notifications.workspace_loaded;
 
     if !loop_state.workspace_loaded
         && loop_state.roots_scanned == loop_state.roots_total
@@ -930,7 +911,7 @@ fn update_file_notifications_on_threadpool(
     subscriptions: Vec<FileId>,
 ) {
     log::trace!("updating notifications for {:?}", subscriptions);
-    let publish_diagnostics = world.feature_flags.get("lsp.diagnostics");
+    let publish_diagnostics = world.config.publish_diagnostics;
     pool.execute(move || {
         for file_id in subscriptions {
             if publish_diagnostics {

crates/rust-analyzer/src/main_loop/handlers.rs

@@ -19,8 +19,8 @@ use lsp_types::{
     TextEdit, WorkspaceEdit,
 };
 use ra_ide::{
-    Assist, AssistId, CompletionConfig, FileId, FilePosition, FileRange, Query, RangeInfo,
-    Runnable, RunnableKind, SearchScope,
+    Assist, AssistId, FileId, FilePosition, FileRange, Query, RangeInfo, Runnable, RunnableKind,
+    SearchScope,
 };
 use ra_prof::profile;
 use ra_syntax::{AstNode, SyntaxKind, TextRange, TextUnit};
@@ -426,15 +426,7 @@ pub fn handle_completion(
         return Ok(None);
     }
 
-    let config = CompletionConfig {
-        enable_postfix_completions: world.feature_flags.get("completion.enable-postfix"),
-        add_call_parenthesis: world.feature_flags.get("completion.insertion.add-call-parenthesis"),
-        add_call_argument_snippets: world
-            .feature_flags
-            .get("completion.insertion.add-argument-snippets"),
-    };
-
-    let items = match world.analysis().completions(position, &config)? {
+    let items = match world.analysis().completions(position, &world.config.completion)? {
         None => return Ok(None),
         Some(items) => items,
     };
@@ -471,7 +463,7 @@ pub fn handle_signature_help(
     let _p = profile("handle_signature_help");
     let position = params.try_conv_with(&world)?;
     if let Some(call_info) = world.analysis().call_info(position)? {
-        let concise = !world.feature_flags.get("call-info.full");
+        let concise = !world.config.call_info_full;
         let mut active_parameter = call_info.active_parameter.map(|it| it as i64);
         if concise && call_info.signature.has_self_param {
             active_parameter = active_parameter.map(|it| it.saturating_sub(1));

crates/rust-analyzer/src/world.rs

@@ -23,7 +23,6 @@ use stdx::format_to;
 use crate::{
     config::Config,
     diagnostics::{CheckFixes, DiagnosticCollection},
-    feature_flags::FeatureFlags,
     main_loop::pending_requests::{CompletedRequest, LatestRequests},
     vfs_glob::{Glob, RustPackageFilterBuilder},
     LspError, Result,
@@ -59,7 +58,6 @@ fn create_flycheck(workspaces: &[ProjectWorkspace], config: &Config) -> Option<F
 #[derive(Debug)]
 pub struct WorldState {
     pub config: Config,
-    pub feature_flags: Arc<FeatureFlags>,
     pub roots: Vec<PathBuf>,
     pub workspaces: Arc<Vec<ProjectWorkspace>>,
     pub analysis_host: AnalysisHost,
@@ -73,7 +71,6 @@ pub struct WorldState {
 /// An immutable snapshot of the world's state at a point in time.
 pub struct WorldSnapshot {
     pub config: Config,
-    pub feature_flags: Arc<FeatureFlags>,
     pub workspaces: Arc<Vec<ProjectWorkspace>>,
     pub analysis: Analysis,
     pub latest_requests: Arc<RwLock<LatestRequests>>,
@@ -89,7 +86,6 @@ impl WorldState {
         exclude_globs: &[Glob],
         watch: Watch,
         config: Config,
-        feature_flags: FeatureFlags,
     ) -> WorldState {
         let mut change = AnalysisChange::new();
 
@@ -197,7 +193,6 @@ impl WorldState {
         analysis_host.apply_change(change);
         WorldState {
             config: config,
-            feature_flags: Arc::new(feature_flags),
             roots: folder_roots,
             workspaces: Arc::new(workspaces),
             analysis_host,
@@ -209,13 +204,7 @@ impl WorldState {
         }
     }
 
-    pub fn update_configuration(
-        &mut self,
-        lru_capacity: Option<usize>,
-        config: Config,
-        feature_flags: FeatureFlags,
-    ) {
-        self.feature_flags = Arc::new(feature_flags);
+    pub fn update_configuration(&mut self, lru_capacity: Option<usize>, config: Config) {
         self.analysis_host.update_lru_capacity(lru_capacity);
         self.flycheck = create_flycheck(&self.workspaces, &config);
         self.config = config;
@@ -275,7 +264,6 @@ impl WorldState {
     pub fn snapshot(&self) -> WorldSnapshot {
         WorldSnapshot {
             config: self.config.clone(),
-            feature_flags: Arc::clone(&self.feature_flags),
             workspaces: Arc::clone(&self.workspaces),
             analysis: self.analysis_host.analysis(),
             vfs: Arc::clone(&self.vfs),