crates/rust-analyzer/src/config.rs

   1 //! Config used by the language server.
   2 //!
   3 //! We currently get this config from `initialize` LSP request, which is not the
   4 //! best way to do it, but was the simplest thing we could implement.
   5 //!
   6 //! Of particular interest is the `feature_flags` hash map: while other fields
   7 //! configure the server itself, feature flags are passed into analysis, and
   8 //! tweak things like automatic insertion of `()` in completions.
   9
  10 use std::{ffi::OsString, iter, path::PathBuf};
  11
  12 use flycheck::FlycheckConfig;
  13 use ide::{
  14     AssistConfig, CompletionConfig, DiagnosticsConfig, HoverConfig, HoverDocFormat,
  15     InlayHintsConfig, JoinLinesConfig,
  16 };
  17 use ide_db::helpers::{
  18     insert_use::{ImportGranularity, InsertUseConfig, PrefixKind},
  19     SnippetCap,
  20 };
  21 use lsp_types::{ClientCapabilities, MarkupKind};
  22 use project_model::{CargoConfig, ProjectJson, ProjectJsonData, ProjectManifest, RustcSource};
  23 use rustc_hash::{FxHashMap, FxHashSet};
  24 use serde::{de::DeserializeOwned, Deserialize};
  25 use vfs::AbsPathBuf;
  26
  27 use crate::{
  28     caps::completion_item_edit_resolve, diagnostics::DiagnosticsMapConfig,
  29     line_index::OffsetEncoding, lsp_ext::supports_utf8, lsp_ext::WorkspaceSymbolSearchKind,
  30     lsp_ext::WorkspaceSymbolSearchScope,
  31 };
  32
  33 // Defines the server-side configuration of the rust-analyzer. We generate
  34 // *parts* of VS Code's `package.json` config from this.
  35 //
  36 // However, editor specific config, which the server doesn't know about, should
  37 // be specified directly in `package.json`.
  38 //
  39 // To deprecate an option by replacing it with another name use `new_name | `old_name` so that we keep
  40 // parsing the old name.
  41 config_data! {
  42     struct ConfigData {
  43         /// How imports should be grouped into use statements.
  44         assist_importGranularity |
  45         assist_importMergeBehavior |
  46         assist_importMergeBehaviour: ImportGranularityDef  = "\"crate\"",
  47         /// Whether to enforce the import granularity setting for all files. If set to false rust-analyzer will try to keep import styles consistent per file.
  48         assist_importEnforceGranularity: bool              = "false",
  49         /// The path structure for newly inserted paths to use.
  50         assist_importPrefix: ImportPrefixDef               = "\"plain\"",
  51         /// Group inserted imports by the [following order](https://rust-analyzer.github.io/manual.html#auto-import). Groups are separated by newlines.
  52         assist_importGroup: bool                           = "true",
  53         /// Whether to allow import insertion to merge new imports into single path glob imports like `use std::fmt::*;`.
  54         assist_allowMergingIntoGlobImports: bool           = "true",
  55
  56         /// Show function name and docs in parameter hints.
  57         callInfo_full: bool                                = "true",
  58
  59         /// Automatically refresh project info via `cargo metadata` on
  60         /// `Cargo.toml` changes.
  61         cargo_autoreload: bool           = "true",
  62         /// Activate all available features (`--all-features`).
  63         cargo_allFeatures: bool          = "false",
  64         /// Unsets `#[cfg(test)]` for the specified crates.
  65         cargo_unsetTest: Vec<String>   = "[\"core\"]",
  66         /// List of features to activate.
  67         cargo_features: Vec<String>      = "[]",
  68         /// Run build scripts (`build.rs`) for more precise code analysis.
  69         cargo_runBuildScripts |
  70         cargo_loadOutDirsFromCheck: bool = "true",
  71         /// Use `RUSTC_WRAPPER=rust-analyzer` when running build scripts to
  72         /// avoid compiling unnecessary things.
  73         cargo_useRustcWrapperForBuildScripts: bool = "true",
  74         /// Do not activate the `default` feature.
  75         cargo_noDefaultFeatures: bool    = "false",
  76         /// Compilation target (target triple).
  77         cargo_target: Option<String>     = "null",
  78         /// Internal config for debugging, disables loading of sysroot crates.
  79         cargo_noSysroot: bool            = "false",
  80
  81         /// Run specified `cargo check` command for diagnostics on save.
  82         checkOnSave_enable: bool                         = "true",
  83         /// Check with all features (`--all-features`).
  84         /// Defaults to `#rust-analyzer.cargo.allFeatures#`.
  85         checkOnSave_allFeatures: Option<bool>            = "null",
  86         /// Check all targets and tests (`--all-targets`).
  87         checkOnSave_allTargets: bool                     = "true",
  88         /// Cargo command to use for `cargo check`.
  89         checkOnSave_command: String                      = "\"check\"",
  90         /// Do not activate the `default` feature.
  91         checkOnSave_noDefaultFeatures: Option<bool>      = "null",
  92         /// Check for a specific target. Defaults to
  93         /// `#rust-analyzer.cargo.target#`.
  94         checkOnSave_target: Option<String>               = "null",
  95         /// Extra arguments for `cargo check`.
  96         checkOnSave_extraArgs: Vec<String>               = "[]",
  97         /// List of features to activate. Defaults to
  98         /// `#rust-analyzer.cargo.features#`.
  99         checkOnSave_features: Option<Vec<String>>        = "null",
 100         /// Advanced option, fully override the command rust-analyzer uses for
 101         /// checking. The command should include `--message-format=json` or
 102         /// similar option.
 103         checkOnSave_overrideCommand: Option<Vec<String>> = "null",
 104
 105         /// Whether to add argument snippets when completing functions.
 106         /// Only applies when `#rust-analyzer.completion.addCallParenthesis#` is set.
 107         completion_addCallArgumentSnippets: bool = "true",
 108         /// Whether to add parenthesis when completing functions.
 109         completion_addCallParenthesis: bool      = "true",
 110         /// Whether to show postfix snippets like `dbg`, `if`, `not`, etc.
 111         completion_postfix_enable: bool          = "true",
 112         /// Toggles the additional completions that automatically add imports when completed.
 113         /// Note that your client must specify the `additionalTextEdits` LSP client capability to truly have this feature enabled.
 114         completion_autoimport_enable: bool       = "true",
 115         /// Toggles the additional completions that automatically show method calls and field accesses
 116         /// with `self` prefixed to them when inside a method.
 117         completion_autoself_enable: bool       = "true",
 118
 119         /// Whether to show native rust-analyzer diagnostics.
 120         diagnostics_enable: bool                = "true",
 121         /// Whether to show experimental rust-analyzer diagnostics that might
 122         /// have more false positives than usual.
 123         diagnostics_enableExperimental: bool    = "true",
 124         /// List of rust-analyzer diagnostics to disable.
 125         diagnostics_disabled: FxHashSet<String> = "[]",
 126         /// Map of prefixes to be substituted when parsing diagnostic file paths.
 127         /// This should be the reverse mapping of what is passed to `rustc` as `--remap-path-prefix`.
 128         diagnostics_remapPrefix: FxHashMap<String, String> = "{}",
 129         /// List of warnings that should be displayed with hint severity.
 130         ///
 131         /// The warnings will be indicated by faded text or three dots in code
 132         /// and will not show up in the `Problems Panel`.
 133         diagnostics_warningsAsHint: Vec<String> = "[]",
 134         /// List of warnings that should be displayed with info severity.
 135         ///
 136         /// The warnings will be indicated by a blue squiggly underline in code
 137         /// and a blue icon in the `Problems Panel`.
 138         diagnostics_warningsAsInfo: Vec<String> = "[]",
 139
 140         /// Expand attribute macros.
 141         experimental_procAttrMacros: bool = "false",
 142
 143         /// Controls file watching implementation.
 144         files_watcher: String = "\"client\"",
 145         /// These directories will be ignored by rust-analyzer.
 146         files_excludeDirs: Vec<PathBuf> = "[]",
 147
 148         /// Use semantic tokens for strings.
 149         ///
 150         /// In some editors (e.g. vscode) semantic tokens override other highlighting grammars.
 151         /// By disabling semantic tokens for strings, other grammars can be used to highlight
 152         /// their contents.
 153         highlighting_strings: bool = "true",
 154
 155         /// Whether to show documentation on hover.
 156         hover_documentation: bool       = "true",
 157         /// Use markdown syntax for links in hover.
 158         hover_linksInHover |
 159         hoverActions_linksInHover: bool = "true",
 160
 161         /// Whether to show `Debug` action. Only applies when
 162         /// `#rust-analyzer.hoverActions.enable#` is set.
 163         hoverActions_debug: bool           = "true",
 164         /// Whether to show HoverActions in Rust files.
 165         hoverActions_enable: bool          = "true",
 166         /// Whether to show `Go to Type Definition` action. Only applies when
 167         /// `#rust-analyzer.hoverActions.enable#` is set.
 168         hoverActions_gotoTypeDef: bool     = "true",
 169         /// Whether to show `Implementations` action. Only applies when
 170         /// `#rust-analyzer.hoverActions.enable#` is set.
 171         hoverActions_implementations: bool = "true",
 172         /// Whether to show `References` action. Only applies when
 173         /// `#rust-analyzer.hoverActions.enable#` is set.
 174         hoverActions_references: bool      = "false",
 175         /// Whether to show `Run` action. Only applies when
 176         /// `#rust-analyzer.hoverActions.enable#` is set.
 177         hoverActions_run: bool             = "true",
 178
 179         /// Whether to show inlay type hints for method chains.
 180         inlayHints_chainingHints: bool      = "true",
 181         /// Maximum length for inlay hints. Set to null to have an unlimited length.
 182         inlayHints_maxLength: Option<usize> = "25",
 183         /// Whether to show function parameter name inlay hints at the call
 184         /// site.
 185         inlayHints_parameterHints: bool     = "true",
 186         /// Whether to show inlay type hints for variables.
 187         inlayHints_typeHints: bool          = "true",
 188
 189         /// Join lines inserts else between consecutive ifs.
 190         joinLines_joinElseIf: bool = "true",
 191         /// Join lines removes trailing commas.
 192         joinLines_removeTrailingComma: bool = "true",
 193         /// Join lines unwraps trivial blocks.
 194         joinLines_unwrapTrivialBlock: bool = "true",
 195
 196         /// Whether to show `Debug` lens. Only applies when
 197         /// `#rust-analyzer.lens.enable#` is set.
 198         lens_debug: bool            = "true",
 199         /// Whether to show CodeLens in Rust files.
 200         lens_enable: bool           = "true",
 201         /// Whether to show `Implementations` lens. Only applies when
 202         /// `#rust-analyzer.lens.enable#` is set.
 203         lens_implementations: bool  = "true",
 204         /// Whether to show `Run` lens. Only applies when
 205         /// `#rust-analyzer.lens.enable#` is set.
 206         lens_run: bool              = "true",
 207         /// Whether to show `Method References` lens. Only applies when
 208         /// `#rust-analyzer.lens.enable#` is set.
 209         lens_methodReferences: bool = "false",
 210         /// Whether to show `References` lens. Only applies when
 211         /// `#rust-analyzer.lens.enable#` is set.
 212         lens_references: bool = "false",
 213
 214         /// Disable project auto-discovery in favor of explicitly specified set
 215         /// of projects.
 216         ///
 217         /// Elements must be paths pointing to `Cargo.toml`,
 218         /// `rust-project.json`, or JSON objects in `rust-project.json` format.
 219         linkedProjects: Vec<ManifestOrProjectJson> = "[]",
 220
 221         /// Number of syntax trees rust-analyzer keeps in memory. Defaults to 128.
 222         lruCapacity: Option<usize>                 = "null",
 223
 224         /// Whether to show `can't find Cargo.toml` error message.
 225         notifications_cargoTomlNotFound: bool      = "true",
 226
 227         /// Enable support for procedural macros, implies `#rust-analyzer.cargo.runBuildScripts#`.
 228         procMacro_enable: bool                     = "true",
 229         /// Internal config, path to proc-macro server executable (typically,
 230         /// this is rust-analyzer itself, but we override this in tests).
 231         procMacro_server: Option<PathBuf>          = "null",
 232
 233         /// Command to be executed instead of 'cargo' for runnables.
 234         runnables_overrideCargo: Option<String> = "null",
 235         /// Additional arguments to be passed to cargo for runnables such as
 236         /// tests or binaries. For example, it may be `--release`.
 237         runnables_cargoExtraArgs: Vec<String>   = "[]",
 238
 239         /// Path to the Cargo.toml of the rust compiler workspace, for usage in rustc_private
 240         /// projects, or "discover" to try to automatically find it.
 241         ///
 242         /// Any project which uses rust-analyzer with the rustcPrivate
 243         /// crates must set `[package.metadata.rust-analyzer] rustc_private=true` to use it.
 244         ///
 245         /// This option is not reloaded automatically; you must restart rust-analyzer for it to take effect.
 246         rustcSource: Option<String> = "null",
 247
 248         /// Additional arguments to `rustfmt`.
 249         rustfmt_extraArgs: Vec<String>               = "[]",
 250         /// Advanced option, fully override the command rust-analyzer uses for
 251         /// formatting.
 252         rustfmt_overrideCommand: Option<Vec<String>> = "null",
 253         /// Enables the use of rustfmt's unstable range formatting command for the
 254         /// `textDocument/rangeFormatting` request. The rustfmt option is unstable and only
 255         /// available on a nightly build.
 256         rustfmt_enableRangeFormatting: bool = "false",
 257
 258         /// Workspace symbol search scope.
 259         workspace_symbol_search_scope: WorskpaceSymbolSearchScopeDef = "\"workspace\"",
 260         /// Workspace symbol search kind.
 261         workspace_symbol_search_kind: WorskpaceSymbolSearchKindDef = "\"only_types\"",
 262     }
 263 }
 264
 265 impl Default for ConfigData {
 266     fn default() -> Self {
 267         ConfigData::from_json(serde_json::Value::Null)
 268     }
 269 }
 270
 271 #[derive(Debug, Clone)]
 272 pub struct Config {
 273     pub caps: lsp_types::ClientCapabilities,
 274     data: ConfigData,
 275     detached_files: Vec<AbsPathBuf>,
 276     pub discovered_projects: Option<Vec<ProjectManifest>>,
 277     pub root_path: AbsPathBuf,
 278 }
 279
 280 #[derive(Debug, Clone, Eq, PartialEq)]
 281 pub enum LinkedProject {
 282     ProjectManifest(ProjectManifest),
 283     InlineJsonProject(ProjectJson),
 284 }
 285
 286 impl From<ProjectManifest> for LinkedProject {
 287     fn from(v: ProjectManifest) -> Self {
 288         LinkedProject::ProjectManifest(v)
 289     }
 290 }
 291
 292 impl From<ProjectJson> for LinkedProject {
 293     fn from(v: ProjectJson) -> Self {
 294         LinkedProject::InlineJsonProject(v)
 295     }
 296 }
 297
 298 #[derive(Clone, Debug, PartialEq, Eq)]
 299 pub struct LensConfig {
 300     pub run: bool,
 301     pub debug: bool,
 302     pub implementations: bool,
 303     pub method_refs: bool,
 304     pub refs: bool, // for Struct, Enum, Union and Trait
 305 }
 306
 307 impl LensConfig {
 308     pub fn any(&self) -> bool {
 309         self.implementations || self.runnable() || self.references()
 310     }
 311
 312     pub fn none(&self) -> bool {
 313         !self.any()
 314     }
 315
 316     pub fn runnable(&self) -> bool {
 317         self.run || self.debug
 318     }
 319
 320     pub fn references(&self) -> bool {
 321         self.method_refs || self.refs
 322     }
 323 }
 324
 325 #[derive(Clone, Debug, PartialEq, Eq)]
 326 pub struct HoverActionsConfig {
 327     pub implementations: bool,
 328     pub references: bool,
 329     pub run: bool,
 330     pub debug: bool,
 331     pub goto_type_def: bool,
 332 }
 333
 334 impl HoverActionsConfig {
 335     pub const NO_ACTIONS: Self = Self {
 336         implementations: false,
 337         references: false,
 338         run: false,
 339         debug: false,
 340         goto_type_def: false,
 341     };
 342
 343     pub fn any(&self) -> bool {
 344         self.implementations || self.references || self.runnable() || self.goto_type_def
 345     }
 346
 347     pub fn none(&self) -> bool {
 348         !self.any()
 349     }
 350
 351     pub fn runnable(&self) -> bool {
 352         self.run || self.debug
 353     }
 354 }
 355
 356 #[derive(Debug, Clone)]
 357 pub struct FilesConfig {
 358     pub watcher: FilesWatcher,
 359     pub exclude: Vec<AbsPathBuf>,
 360 }
 361
 362 #[derive(Debug, Clone)]
 363 pub enum FilesWatcher {
 364     Client,
 365     Notify,
 366 }
 367
 368 #[derive(Debug, Clone)]
 369 pub struct NotificationsConfig {
 370     pub cargo_toml_not_found: bool,
 371 }
 372
 373 #[derive(Debug, Clone)]
 374 pub enum RustfmtConfig {
 375     Rustfmt { extra_args: Vec<String>, enable_range_formatting: bool },
 376     CustomCommand { command: String, args: Vec<String> },
 377 }
 378
 379 /// Configuration for runnable items, such as `main` function or tests.
 380 #[derive(Debug, Clone)]
 381 pub struct RunnablesConfig {
 382     /// Custom command to be executed instead of `cargo` for runnables.
 383     pub override_cargo: Option<String>,
 384     /// Additional arguments for the `cargo`, e.g. `--release`.
 385     pub cargo_extra_args: Vec<String>,
 386 }
 387
 388 /// Configuration for workspace symbol search requests.
 389 #[derive(Debug, Clone)]
 390 pub struct WorkspaceSymbolConfig {
 391     /// In what scope should the symbol be searched in.
 392     pub search_scope: WorkspaceSymbolSearchScope,
 393     /// What kind of symbol is being search for.
 394     pub search_kind: WorkspaceSymbolSearchKind,
 395 }
 396
 397 impl Config {
 398     pub fn new(root_path: AbsPathBuf, caps: ClientCapabilities) -> Self {
 399         Config {
 400             caps,
 401             data: ConfigData::default(),
 402             detached_files: Vec::new(),
 403             discovered_projects: None,
 404             root_path,
 405         }
 406     }
 407     pub fn update(&mut self, mut json: serde_json::Value) {
 408         log::info!("updating config from JSON: {:#}", json);
 409         if json.is_null() || json.as_object().map_or(false, |it| it.is_empty()) {
 410             return;
 411         }
 412         self.detached_files = get_field::<Vec<PathBuf>>(&mut json, "detachedFiles", None, "[]")
 413             .into_iter()
 414             .map(AbsPathBuf::assert)
 415             .collect();
 416         self.data = ConfigData::from_json(json);
 417     }
 418
 419     pub fn json_schema() -> serde_json::Value {
 420         ConfigData::json_schema()
 421     }
 422 }
 423
 424 macro_rules! try_ {
 425     ($expr:expr) => {
 426         || -> _ { Some($expr) }()
 427     };
 428 }
 429 macro_rules! try_or {
 430     ($expr:expr, $or:expr) => {
 431         try_!($expr).unwrap_or($or)
 432     };
 433 }
 434
 435 impl Config {
 436     pub fn linked_projects(&self) -> Vec<LinkedProject> {
 437         if self.data.linkedProjects.is_empty() {
 438             self.discovered_projects
 439                 .as_ref()
 440                 .into_iter()
 441                 .flatten()
 442                 .cloned()
 443                 .map(LinkedProject::from)
 444                 .collect()
 445         } else {
 446             self.data
 447                 .linkedProjects
 448                 .iter()
 449                 .filter_map(|linked_project| {
 450                     let res = match linked_project {
 451                         ManifestOrProjectJson::Manifest(it) => {
 452                             let path = self.root_path.join(it);
 453                             ProjectManifest::from_manifest_file(path)
 454                                 .map_err(|e| log::error!("failed to load linked project: {}", e))
 455                                 .ok()?
 456                                 .into()
 457                         }
 458                         ManifestOrProjectJson::ProjectJson(it) => {
 459                             ProjectJson::new(&self.root_path, it.clone()).into()
 460                         }
 461                     };
 462                     Some(res)
 463                 })
 464                 .collect()
 465         }
 466     }
 467
 468     pub fn detached_files(&self) -> &[AbsPathBuf] {
 469         &self.detached_files
 470     }
 471
 472     pub fn did_save_text_document_dynamic_registration(&self) -> bool {
 473         let caps =
 474             try_or!(self.caps.text_document.as_ref()?.synchronization.clone()?, Default::default());
 475         caps.did_save == Some(true) && caps.dynamic_registration == Some(true)
 476     }
 477     pub fn did_change_watched_files_dynamic_registration(&self) -> bool {
 478         try_or!(
 479             self.caps.workspace.as_ref()?.did_change_watched_files.as_ref()?.dynamic_registration?,
 480             false
 481         )
 482     }
 483
 484     pub fn location_link(&self) -> bool {
 485         try_or!(self.caps.text_document.as_ref()?.definition?.link_support?, false)
 486     }
 487     pub fn line_folding_only(&self) -> bool {
 488         try_or!(self.caps.text_document.as_ref()?.folding_range.as_ref()?.line_folding_only?, false)
 489     }
 490     pub fn hierarchical_symbols(&self) -> bool {
 491         try_or!(
 492             self.caps
 493                 .text_document
 494                 .as_ref()?
 495                 .document_symbol
 496                 .as_ref()?
 497                 .hierarchical_document_symbol_support?,
 498             false
 499         )
 500     }
 501     pub fn code_action_literals(&self) -> bool {
 502         try_!(self
 503             .caps
 504             .text_document
 505             .as_ref()?
 506             .code_action
 507             .as_ref()?
 508             .code_action_literal_support
 509             .as_ref()?)
 510         .is_some()
 511     }
 512     pub fn work_done_progress(&self) -> bool {
 513         try_or!(self.caps.window.as_ref()?.work_done_progress?, false)
 514     }
 515     pub fn will_rename(&self) -> bool {
 516         try_or!(self.caps.workspace.as_ref()?.file_operations.as_ref()?.will_rename?, false)
 517     }
 518     pub fn change_annotation_support(&self) -> bool {
 519         try_!(self
 520             .caps
 521             .workspace
 522             .as_ref()?
 523             .workspace_edit
 524             .as_ref()?
 525             .change_annotation_support
 526             .as_ref()?)
 527         .is_some()
 528     }
 529     pub fn code_action_resolve(&self) -> bool {
 530         try_or!(
 531             self.caps
 532                 .text_document
 533                 .as_ref()?
 534                 .code_action
 535                 .as_ref()?
 536                 .resolve_support
 537                 .as_ref()?
 538                 .properties
 539                 .as_slice(),
 540             &[]
 541         )
 542         .iter()
 543         .any(|it| it == "edit")
 544     }
 545     pub fn signature_help_label_offsets(&self) -> bool {
 546         try_or!(
 547             self.caps
 548                 .text_document
 549                 .as_ref()?
 550                 .signature_help
 551                 .as_ref()?
 552                 .signature_information
 553                 .as_ref()?
 554                 .parameter_information
 555                 .as_ref()?
 556                 .label_offset_support?,
 557             false
 558         )
 559     }
 560     pub fn offset_encoding(&self) -> OffsetEncoding {
 561         if supports_utf8(&self.caps) {
 562             OffsetEncoding::Utf8
 563         } else {
 564             OffsetEncoding::Utf16
 565         }
 566     }
 567
 568     fn experimental(&self, index: &'static str) -> bool {
 569         try_or!(self.caps.experimental.as_ref()?.get(index)?.as_bool()?, false)
 570     }
 571     pub fn code_action_group(&self) -> bool {
 572         self.experimental("codeActionGroup")
 573     }
 574     pub fn experimental_hover_actions(&self) -> bool {
 575         self.experimental("hoverActions")
 576     }
 577     pub fn server_status_notification(&self) -> bool {
 578         self.experimental("serverStatusNotification")
 579     }
 580
 581     pub fn publish_diagnostics(&self) -> bool {
 582         self.data.diagnostics_enable
 583     }
 584     pub fn diagnostics(&self) -> DiagnosticsConfig {
 585         DiagnosticsConfig {
 586             disable_experimental: !self.data.diagnostics_enableExperimental,
 587             disabled: self.data.diagnostics_disabled.clone(),
 588         }
 589     }
 590     pub fn diagnostics_map(&self) -> DiagnosticsMapConfig {
 591         DiagnosticsMapConfig {
 592             remap_prefix: self.data.diagnostics_remapPrefix.clone(),
 593             warnings_as_info: self.data.diagnostics_warningsAsInfo.clone(),
 594             warnings_as_hint: self.data.diagnostics_warningsAsHint.clone(),
 595         }
 596     }
 597     pub fn lru_capacity(&self) -> Option<usize> {
 598         self.data.lruCapacity
 599     }
 600     pub fn proc_macro_srv(&self) -> Option<(AbsPathBuf, Vec<OsString>)> {
 601         if !self.data.procMacro_enable {
 602             return None;
 603         }
 604         let path = match &self.data.procMacro_server {
 605             Some(it) => self.root_path.join(it),
 606             None => AbsPathBuf::assert(std::env::current_exe().ok()?),
 607         };
 608         Some((path, vec!["proc-macro".into()]))
 609     }
 610     pub fn expand_proc_attr_macros(&self) -> bool {
 611         self.data.experimental_procAttrMacros
 612     }
 613     pub fn files(&self) -> FilesConfig {
 614         FilesConfig {
 615             watcher: match self.data.files_watcher.as_str() {
 616                 "notify" => FilesWatcher::Notify,
 617                 "client" | _ => FilesWatcher::Client,
 618             },
 619             exclude: self.data.files_excludeDirs.iter().map(|it| self.root_path.join(it)).collect(),
 620         }
 621     }
 622     pub fn notifications(&self) -> NotificationsConfig {
 623         NotificationsConfig { cargo_toml_not_found: self.data.notifications_cargoTomlNotFound }
 624     }
 625     pub fn cargo_autoreload(&self) -> bool {
 626         self.data.cargo_autoreload
 627     }
 628     pub fn run_build_scripts(&self) -> bool {
 629         self.data.cargo_runBuildScripts || self.data.procMacro_enable
 630     }
 631     pub fn wrap_rustc(&self) -> bool {
 632         self.data.cargo_useRustcWrapperForBuildScripts
 633     }
 634     pub fn cargo(&self) -> CargoConfig {
 635         let rustc_source = self.data.rustcSource.as_ref().map(|rustc_src| {
 636             if rustc_src == "discover" {
 637                 RustcSource::Discover
 638             } else {
 639                 RustcSource::Path(self.root_path.join(rustc_src))
 640             }
 641         });
 642
 643         CargoConfig {
 644             no_default_features: self.data.cargo_noDefaultFeatures,
 645             all_features: self.data.cargo_allFeatures,
 646             features: self.data.cargo_features.clone(),
 647             target: self.data.cargo_target.clone(),
 648             rustc_source,
 649             no_sysroot: self.data.cargo_noSysroot,
 650             unset_test_crates: self.data.cargo_unsetTest.clone(),
 651         }
 652     }
 653
 654     pub fn rustfmt(&self) -> RustfmtConfig {
 655         match &self.data.rustfmt_overrideCommand {
 656             Some(args) if !args.is_empty() => {
 657                 let mut args = args.clone();
 658                 let command = args.remove(0);
 659                 RustfmtConfig::CustomCommand { command, args }
 660             }
 661             Some(_) | None => RustfmtConfig::Rustfmt {
 662                 extra_args: self.data.rustfmt_extraArgs.clone(),
 663                 enable_range_formatting: self.data.rustfmt_enableRangeFormatting,
 664             },
 665         }
 666     }
 667     pub fn flycheck(&self) -> Option<FlycheckConfig> {
 668         if !self.data.checkOnSave_enable {
 669             return None;
 670         }
 671         let flycheck_config = match &self.data.checkOnSave_overrideCommand {
 672             Some(args) if !args.is_empty() => {
 673                 let mut args = args.clone();
 674                 let command = args.remove(0);
 675                 FlycheckConfig::CustomCommand { command, args }
 676             }
 677             Some(_) | None => FlycheckConfig::CargoCommand {
 678                 command: self.data.checkOnSave_command.clone(),
 679                 target_triple: self
 680                     .data
 681                     .checkOnSave_target
 682                     .clone()
 683                     .or_else(|| self.data.cargo_target.clone()),
 684                 all_targets: self.data.checkOnSave_allTargets,
 685                 no_default_features: self
 686                     .data
 687                     .checkOnSave_noDefaultFeatures
 688                     .unwrap_or(self.data.cargo_noDefaultFeatures),
 689                 all_features: self
 690                     .data
 691                     .checkOnSave_allFeatures
 692                     .unwrap_or(self.data.cargo_allFeatures),
 693                 features: self
 694                     .data
 695                     .checkOnSave_features
 696                     .clone()
 697                     .unwrap_or_else(|| self.data.cargo_features.clone()),
 698                 extra_args: self.data.checkOnSave_extraArgs.clone(),
 699             },
 700         };
 701         Some(flycheck_config)
 702     }
 703     pub fn runnables(&self) -> RunnablesConfig {
 704         RunnablesConfig {
 705             override_cargo: self.data.runnables_overrideCargo.clone(),
 706             cargo_extra_args: self.data.runnables_cargoExtraArgs.clone(),
 707         }
 708     }
 709     pub fn inlay_hints(&self) -> InlayHintsConfig {
 710         InlayHintsConfig {
 711             type_hints: self.data.inlayHints_typeHints,
 712             parameter_hints: self.data.inlayHints_parameterHints,
 713             chaining_hints: self.data.inlayHints_chainingHints,
 714             max_length: self.data.inlayHints_maxLength,
 715         }
 716     }
 717     fn insert_use_config(&self) -> InsertUseConfig {
 718         InsertUseConfig {
 719             granularity: match self.data.assist_importGranularity {
 720                 ImportGranularityDef::Preserve => ImportGranularity::Preserve,
 721                 ImportGranularityDef::Item => ImportGranularity::Item,
 722                 ImportGranularityDef::Crate => ImportGranularity::Crate,
 723                 ImportGranularityDef::Module => ImportGranularity::Module,
 724             },
 725             enforce_granularity: self.data.assist_importEnforceGranularity,
 726             prefix_kind: match self.data.assist_importPrefix {
 727                 ImportPrefixDef::Plain => PrefixKind::Plain,
 728                 ImportPrefixDef::ByCrate => PrefixKind::ByCrate,
 729                 ImportPrefixDef::BySelf => PrefixKind::BySelf,
 730             },
 731             group: self.data.assist_importGroup,
 732             skip_glob_imports: !self.data.assist_allowMergingIntoGlobImports,
 733         }
 734     }
 735     pub fn completion(&self) -> CompletionConfig {
 736         CompletionConfig {
 737             enable_postfix_completions: self.data.completion_postfix_enable,
 738             enable_imports_on_the_fly: self.data.completion_autoimport_enable
 739                 && completion_item_edit_resolve(&self.caps),
 740             enable_self_on_the_fly: self.data.completion_autoself_enable,
 741             add_call_parenthesis: self.data.completion_addCallParenthesis,
 742             add_call_argument_snippets: self.data.completion_addCallArgumentSnippets,
 743             insert_use: self.insert_use_config(),
 744             snippet_cap: SnippetCap::new(try_or!(
 745                 self.caps
 746                     .text_document
 747                     .as_ref()?
 748                     .completion
 749                     .as_ref()?
 750                     .completion_item
 751                     .as_ref()?
 752                     .snippet_support?,
 753                 false
 754             )),
 755         }
 756     }
 757     pub fn assist(&self) -> AssistConfig {
 758         AssistConfig {
 759             snippet_cap: SnippetCap::new(self.experimental("snippetTextEdit")),
 760             allowed: None,
 761             insert_use: self.insert_use_config(),
 762         }
 763     }
 764     pub fn join_lines(&self) -> JoinLinesConfig {
 765         JoinLinesConfig {
 766             join_else_if: self.data.joinLines_joinElseIf,
 767             remove_trailing_comma: self.data.joinLines_removeTrailingComma,
 768             unwrap_trivial_blocks: self.data.joinLines_unwrapTrivialBlock,
 769         }
 770     }
 771     pub fn call_info_full(&self) -> bool {
 772         self.data.callInfo_full
 773     }
 774     pub fn lens(&self) -> LensConfig {
 775         LensConfig {
 776             run: self.data.lens_enable && self.data.lens_run,
 777             debug: self.data.lens_enable && self.data.lens_debug,
 778             implementations: self.data.lens_enable && self.data.lens_implementations,
 779             method_refs: self.data.lens_enable && self.data.lens_methodReferences,
 780             refs: self.data.lens_enable && self.data.lens_references,
 781         }
 782     }
 783     pub fn hover_actions(&self) -> HoverActionsConfig {
 784         HoverActionsConfig {
 785             implementations: self.data.hoverActions_enable
 786                 && self.data.hoverActions_implementations,
 787             references: self.data.hoverActions_enable && self.data.hoverActions_references,
 788             run: self.data.hoverActions_enable && self.data.hoverActions_run,
 789             debug: self.data.hoverActions_enable && self.data.hoverActions_debug,
 790             goto_type_def: self.data.hoverActions_enable && self.data.hoverActions_gotoTypeDef,
 791         }
 792     }
 793     pub fn highlighting_strings(&self) -> bool {
 794         self.data.highlighting_strings
 795     }
 796     pub fn hover(&self) -> HoverConfig {
 797         HoverConfig {
 798             links_in_hover: self.data.hover_linksInHover,
 799             documentation: self.data.hover_documentation.then(|| {
 800                 let is_markdown = try_or!(
 801                     self.caps
 802                         .text_document
 803                         .as_ref()?
 804                         .hover
 805                         .as_ref()?
 806                         .content_format
 807                         .as_ref()?
 808                         .as_slice(),
 809                     &[]
 810                 )
 811                 .contains(&MarkupKind::Markdown);
 812                 if is_markdown {
 813                     HoverDocFormat::Markdown
 814                 } else {
 815                     HoverDocFormat::PlainText
 816                 }
 817             }),
 818         }
 819     }
 820
 821     pub fn workspace_symbol(&self) -> WorkspaceSymbolConfig {
 822         WorkspaceSymbolConfig {
 823             search_scope: match self.data.workspace_symbol_search_scope {
 824                 WorskpaceSymbolSearchScopeDef::Workspace => WorkspaceSymbolSearchScope::Workspace,
 825                 WorskpaceSymbolSearchScopeDef::WorkspaceAndDependencies => {
 826                     WorkspaceSymbolSearchScope::WorkspaceAndDependencies
 827                 }
 828             },
 829             search_kind: match self.data.workspace_symbol_search_kind {
 830                 WorskpaceSymbolSearchKindDef::OnlyTypes => WorkspaceSymbolSearchKind::OnlyTypes,
 831                 WorskpaceSymbolSearchKindDef::AllSymbols => WorkspaceSymbolSearchKind::AllSymbols,
 832             },
 833         }
 834     }
 835
 836     pub fn semantic_tokens_refresh(&self) -> bool {
 837         try_or!(self.caps.workspace.as_ref()?.semantic_tokens.as_ref()?.refresh_support?, false)
 838     }
 839     pub fn code_lens_refresh(&self) -> bool {
 840         try_or!(self.caps.workspace.as_ref()?.code_lens.as_ref()?.refresh_support?, false)
 841     }
 842     pub fn insert_replace_support(&self) -> bool {
 843         try_or!(
 844             self.caps
 845                 .text_document
 846                 .as_ref()?
 847                 .completion
 848                 .as_ref()?
 849                 .completion_item
 850                 .as_ref()?
 851                 .insert_replace_support?,
 852             false
 853         )
 854     }
 855 }
 856
 857 #[derive(Deserialize, Debug, Clone)]
 858 #[serde(untagged)]
 859 enum ManifestOrProjectJson {
 860     Manifest(PathBuf),
 861     ProjectJson(ProjectJsonData),
 862 }
 863
 864 #[derive(Deserialize, Debug, Clone)]
 865 #[serde(rename_all = "snake_case")]
 866 enum ImportGranularityDef {
 867     Preserve,
 868     #[serde(alias = "none")]
 869     Item,
 870     #[serde(alias = "full")]
 871     Crate,
 872     #[serde(alias = "last")]
 873     Module,
 874 }
 875
 876 #[derive(Deserialize, Debug, Clone)]
 877 #[serde(rename_all = "snake_case")]
 878 enum ImportPrefixDef {
 879     Plain,
 880     #[serde(alias = "self")]
 881     BySelf,
 882     #[serde(alias = "crate")]
 883     ByCrate,
 884 }
 885
 886 #[derive(Deserialize, Debug, Clone)]
 887 #[serde(rename_all = "snake_case")]
 888 enum WorskpaceSymbolSearchScopeDef {
 889     Workspace,
 890     WorkspaceAndDependencies,
 891 }
 892
 893 #[derive(Deserialize, Debug, Clone)]
 894 #[serde(rename_all = "snake_case")]
 895 enum WorskpaceSymbolSearchKindDef {
 896     OnlyTypes,
 897     AllSymbols,
 898 }
 899
 900 macro_rules! _config_data {
 901     (struct $name:ident {
 902         $(
 903             $(#[doc=$doc:literal])*
 904             $field:ident $(| $alias:ident)*: $ty:ty = $default:expr,
 905         )*
 906     }) => {
 907         #[allow(non_snake_case)]
 908         #[derive(Debug, Clone)]
 909         struct $name { $($field: $ty,)* }
 910         impl $name {
 911             fn from_json(mut json: serde_json::Value) -> $name {
 912                 $name {$(
 913                     $field: get_field(
 914                         &mut json,
 915                         stringify!($field),
 916                         None$(.or(Some(stringify!($alias))))*,
 917                         $default,
 918                     ),
 919                 )*}
 920             }
 921
 922             fn json_schema() -> serde_json::Value {
 923                 schema(&[
 924                     $({
 925                         let field = stringify!($field);
 926                         let ty = stringify!($ty);
 927
 928                         (field, ty, &[$($doc),*], $default)
 929                     },)*
 930                 ])
 931             }
 932
 933             #[cfg(test)]
 934             fn manual() -> String {
 935                 manual(&[
 936                     $({
 937                         let field = stringify!($field);
 938                         let ty = stringify!($ty);
 939
 940                         (field, ty, &[$($doc),*], $default)
 941                     },)*
 942                 ])
 943             }
 944         }
 945     };
 946 }
 947 use _config_data as config_data;
 948
 949 fn get_field<T: DeserializeOwned>(
 950     json: &mut serde_json::Value,
 951     field: &'static str,
 952     alias: Option<&'static str>,
 953     default: &str,
 954 ) -> T {
 955     let default = serde_json::from_str(default).unwrap();
 956
 957     // XXX: check alias first, to work-around the VS Code where it pre-fills the
 958     // defaults instead of sending an empty object.
 959     alias
 960         .into_iter()
 961         .chain(iter::once(field))
 962         .find_map(move |field| {
 963             let mut pointer = field.replace('_', "/");
 964             pointer.insert(0, '/');
 965             json.pointer_mut(&pointer).and_then(|it| serde_json::from_value(it.take()).ok())
 966         })
 967         .unwrap_or(default)
 968 }
 969
 970 fn schema(fields: &[(&'static str, &'static str, &[&str], &str)]) -> serde_json::Value {
 971     for ((f1, ..), (f2, ..)) in fields.iter().zip(&fields[1..]) {
 972         fn key(f: &str) -> &str {
 973             f.splitn(2, '_').next().unwrap()
 974         }
 975         assert!(key(f1) <= key(f2), "wrong field order: {:?} {:?}", f1, f2);
 976     }
 977
 978     let map = fields
 979         .iter()
 980         .map(|(field, ty, doc, default)| {
 981             let name = field.replace("_", ".");
 982             let name = format!("rust-analyzer.{}", name);
 983             let props = field_props(field, ty, doc, default);
 984             (name, props)
 985         })
 986         .collect::<serde_json::Map<_, _>>();
 987     map.into()
 988 }
 989
 990 fn field_props(field: &str, ty: &str, doc: &[&str], default: &str) -> serde_json::Value {
 991     let doc = doc_comment_to_string(doc);
 992     let doc = doc.trim_end_matches('\n');
 993     assert!(
 994         doc.ends_with('.') && doc.starts_with(char::is_uppercase),
 995         "bad docs for {}: {:?}",
 996         field,
 997         doc
 998     );
 999     let default = default.parse::<serde_json::Value>().unwrap();
1000
1001     let mut map = serde_json::Map::default();
1002     macro_rules! set {
1003         ($($key:literal: $value:tt),*$(,)?) => {{$(
1004             map.insert($key.into(), serde_json::json!($value));
1005         )*}};
1006     }
1007     set!("markdownDescription": doc);
1008     set!("default": default);
1009
1010     match ty {
1011         "bool" => set!("type": "boolean"),
1012         "String" => set!("type": "string"),
1013         "Vec<String>" => set! {
1014             "type": "array",
1015             "items": { "type": "string" },
1016         },
1017         "Vec<PathBuf>" => set! {
1018             "type": "array",
1019             "items": { "type": "string" },
1020         },
1021         "FxHashSet<String>" => set! {
1022             "type": "array",
1023             "items": { "type": "string" },
1024             "uniqueItems": true,
1025         },
1026         "FxHashMap<String, String>" => set! {
1027             "type": "object",
1028         },
1029         "Option<usize>" => set! {
1030             "type": ["null", "integer"],
1031             "minimum": 0,
1032         },
1033         "Option<String>" => set! {
1034             "type": ["null", "string"],
1035         },
1036         "Option<PathBuf>" => set! {
1037             "type": ["null", "string"],
1038         },
1039         "Option<bool>" => set! {
1040             "type": ["null", "boolean"],
1041         },
1042         "Option<Vec<String>>" => set! {
1043             "type": ["null", "array"],
1044             "items": { "type": "string" },
1045         },
1046         "MergeBehaviorDef" => set! {
1047             "type": "string",
1048             "enum": ["none", "crate", "module"],
1049             "enumDescriptions": [
1050                 "Do not merge imports at all.",
1051                 "Merge imports from the same crate into a single `use` statement.",
1052                 "Merge imports from the same module into a single `use` statement."
1053             ],
1054         },
1055         "ImportGranularityDef" => set! {
1056             "type": "string",
1057             "enum": ["preserve", "crate", "module", "item"],
1058             "enumDescriptions": [
1059                 "Do not change the granularity of any imports and preserve the original structure written by the developer.",
1060                 "Merge imports from the same crate into a single use statement. Conversely, imports from different crates are split into separate statements.",
1061                 "Merge imports from the same module into a single use statement. Conversely, imports from different modules are split into separate statements.",
1062                 "Flatten imports so that each has its own use statement."
1063             ],
1064         },
1065         "ImportPrefixDef" => set! {
1066             "type": "string",
1067             "enum": [
1068                 "plain",
1069                 "self",
1070                 "crate"
1071             ],
1072             "enumDescriptions": [
1073                 "Insert import paths relative to the current module, using up to one `super` prefix if the parent module contains the requested item.",
1074                 "Insert import paths relative to the current module, using up to one `super` prefix if the parent module contains the requested item. Prefixes `self` in front of the path if it starts with a module.",
1075                 "Force import paths to be absolute by always starting them with `crate` or the extern crate name they come from."
1076             ],
1077         },
1078         "Vec<ManifestOrProjectJson>" => set! {
1079             "type": "array",
1080             "items": { "type": ["string", "object"] },
1081         },
1082         "WorskpaceSymbolSearchScopeDef" => set! {
1083             "type": "string",
1084             "enum": ["workspace", "workspace_and_dependencies"],
1085             "enumDescriptions": [
1086                 "Search in current workspace only",
1087                 "Search in current workspace and dependencies"
1088             ],
1089         },
1090         "WorskpaceSymbolSearchKindDef" => set! {
1091             "type": "string",
1092             "enum": ["only_types", "all_symbols"],
1093             "enumDescriptions": [
1094                 "Search for types only",
1095                 "Search for all symbols kinds"
1096             ],
1097         },
1098         _ => panic!("{}: {}", ty, default),
1099     }
1100
1101     map.into()
1102 }
1103
1104 #[cfg(test)]
1105 fn manual(fields: &[(&'static str, &'static str, &[&str], &str)]) -> String {
1106     fields
1107         .iter()
1108         .map(|(field, _ty, doc, default)| {
1109             let name = format!("rust-analyzer.{}", field.replace("_", "."));
1110             let doc = doc_comment_to_string(*doc);
1111             format!("[[{}]]{} (default: `{}`)::\n+\n--\n{}--\n", name, name, default, doc)
1112         })
1113         .collect::<String>()
1114 }
1115
1116 fn doc_comment_to_string(doc: &[&str]) -> String {
1117     doc.iter().map(|it| it.strip_prefix(' ').unwrap_or(it)).map(|it| format!("{}\n", it)).collect()
1118 }
1119
1120 #[cfg(test)]
1121 mod tests {
1122     use std::fs;
1123
1124     use test_utils::{ensure_file_contents, project_root};
1125
1126     use super::*;
1127
1128     #[test]
1129     fn generate_package_json_config() {
1130         let s = Config::json_schema();
1131         let schema = format!("{:#}", s);
1132         let mut schema = schema
1133             .trim_start_matches('{')
1134             .trim_end_matches('}')
1135             .replace("  ", "    ")
1136             .replace("\n", "\n            ")
1137             .trim_start_matches('\n')
1138             .trim_end()
1139             .to_string();
1140         schema.push_str(",\n");
1141
1142         let package_json_path = project_root().join("editors/code/package.json");
1143         let mut package_json = fs::read_to_string(&package_json_path).unwrap();
1144
1145         let start_marker = "                \"$generated-start\": {},\n";
1146         let end_marker = "                \"$generated-end\": {}\n";
1147
1148         let start = package_json.find(start_marker).unwrap() + start_marker.len();
1149         let end = package_json.find(end_marker).unwrap();
1150
1151         let p = remove_ws(&package_json[start..end]);
1152         let s = remove_ws(&schema);
1153         if !p.contains(&s) {
1154             package_json.replace_range(start..end, &schema);
1155             ensure_file_contents(&package_json_path, &package_json)
1156         }
1157     }
1158
1159     #[test]
1160     fn generate_config_documentation() {
1161         let docs_path = project_root().join("docs/user/generated_config.adoc");
1162         let expected = ConfigData::manual();
1163         ensure_file_contents(&docs_path, &expected);
1164     }
1165
1166     fn remove_ws(text: &str) -> String {
1167         text.replace(char::is_whitespace, "")
1168     }
1169 }