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, HighlightRelatedConfig, HoverConfig,
  15     HoverDocFormat, 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. They are
 146         /// relative to the workspace root, and globs are not supported. You may
 147         /// also need to add the folders to Code's `files.watcherExclude`.
 148         files_excludeDirs: Vec<PathBuf> = "[]",
 149
 150         /// Enables highlighting of related references while hovering your mouse above any identifier.
 151         highlightRelated_references: bool = "true",
 152         /// Enables highlighting of all exit points while hovering your mouse above any `return`, `?`, or return type arrow (`->`).
 153         highlightRelated_exitPoints: bool = "true",
 154         /// Enables highlighting of related references while hovering your mouse `break`, `loop`, `while`, or `for` keywords.
 155         highlightRelated_breakPoints: bool = "true",
 156         /// Enables highlighting of all break points for a loop or block context while hovering your mouse above any `async` or `await` keywords.
 157         highlightRelated_yieldPoints: bool = "true",
 158
 159         /// Use semantic tokens for strings.
 160         ///
 161         /// In some editors (e.g. vscode) semantic tokens override other highlighting grammars.
 162         /// By disabling semantic tokens for strings, other grammars can be used to highlight
 163         /// their contents.
 164         highlighting_strings: bool = "true",
 165
 166         /// Whether to show documentation on hover.
 167         hover_documentation: bool       = "true",
 168         /// Use markdown syntax for links in hover.
 169         hover_linksInHover |
 170         hoverActions_linksInHover: bool = "true",
 171
 172         /// Whether to show `Debug` action. Only applies when
 173         /// `#rust-analyzer.hoverActions.enable#` is set.
 174         hoverActions_debug: bool           = "true",
 175         /// Whether to show HoverActions in Rust files.
 176         hoverActions_enable: bool          = "true",
 177         /// Whether to show `Go to Type Definition` action. Only applies when
 178         /// `#rust-analyzer.hoverActions.enable#` is set.
 179         hoverActions_gotoTypeDef: bool     = "true",
 180         /// Whether to show `Implementations` action. Only applies when
 181         /// `#rust-analyzer.hoverActions.enable#` is set.
 182         hoverActions_implementations: bool = "true",
 183         /// Whether to show `References` action. Only applies when
 184         /// `#rust-analyzer.hoverActions.enable#` is set.
 185         hoverActions_references: bool      = "false",
 186         /// Whether to show `Run` action. Only applies when
 187         /// `#rust-analyzer.hoverActions.enable#` is set.
 188         hoverActions_run: bool             = "true",
 189
 190         /// Whether to show inlay type hints for method chains.
 191         inlayHints_chainingHints: bool      = "true",
 192         /// Maximum length for inlay hints. Set to null to have an unlimited length.
 193         inlayHints_maxLength: Option<usize> = "25",
 194         /// Whether to show function parameter name inlay hints at the call
 195         /// site.
 196         inlayHints_parameterHints: bool     = "true",
 197         /// Whether to show inlay type hints for variables.
 198         inlayHints_typeHints: bool          = "true",
 199
 200         /// Join lines inserts else between consecutive ifs.
 201         joinLines_joinElseIf: bool = "true",
 202         /// Join lines removes trailing commas.
 203         joinLines_removeTrailingComma: bool = "true",
 204         /// Join lines unwraps trivial blocks.
 205         joinLines_unwrapTrivialBlock: bool = "true",
 206
 207         /// Whether to show `Debug` lens. Only applies when
 208         /// `#rust-analyzer.lens.enable#` is set.
 209         lens_debug: bool            = "true",
 210         /// Whether to show CodeLens in Rust files.
 211         lens_enable: bool           = "true",
 212         /// Whether to show `Implementations` lens. Only applies when
 213         /// `#rust-analyzer.lens.enable#` is set.
 214         lens_implementations: bool  = "true",
 215         /// Whether to show `Run` lens. Only applies when
 216         /// `#rust-analyzer.lens.enable#` is set.
 217         lens_run: bool              = "true",
 218         /// Whether to show `Method References` lens. Only applies when
 219         /// `#rust-analyzer.lens.enable#` is set.
 220         lens_methodReferences: bool = "false",
 221         /// Whether to show `References` lens. Only applies when
 222         /// `#rust-analyzer.lens.enable#` is set.
 223         lens_references: bool = "false",
 224
 225         /// Disable project auto-discovery in favor of explicitly specified set
 226         /// of projects.
 227         ///
 228         /// Elements must be paths pointing to `Cargo.toml`,
 229         /// `rust-project.json`, or JSON objects in `rust-project.json` format.
 230         linkedProjects: Vec<ManifestOrProjectJson> = "[]",
 231
 232         /// Number of syntax trees rust-analyzer keeps in memory. Defaults to 128.
 233         lruCapacity: Option<usize>                 = "null",
 234
 235         /// Whether to show `can't find Cargo.toml` error message.
 236         notifications_cargoTomlNotFound: bool      = "true",
 237
 238         /// Enable support for procedural macros, implies `#rust-analyzer.cargo.runBuildScripts#`.
 239         procMacro_enable: bool                     = "true",
 240         /// Internal config, path to proc-macro server executable (typically,
 241         /// this is rust-analyzer itself, but we override this in tests).
 242         procMacro_server: Option<PathBuf>          = "null",
 243
 244         /// Command to be executed instead of 'cargo' for runnables.
 245         runnables_overrideCargo: Option<String> = "null",
 246         /// Additional arguments to be passed to cargo for runnables such as
 247         /// tests or binaries. For example, it may be `--release`.
 248         runnables_cargoExtraArgs: Vec<String>   = "[]",
 249
 250         /// Path to the Cargo.toml of the rust compiler workspace, for usage in rustc_private
 251         /// projects, or "discover" to try to automatically find it.
 252         ///
 253         /// Any project which uses rust-analyzer with the rustcPrivate
 254         /// crates must set `[package.metadata.rust-analyzer] rustc_private=true` to use it.
 255         ///
 256         /// This option is not reloaded automatically; you must restart rust-analyzer for it to take effect.
 257         rustcSource: Option<String> = "null",
 258
 259         /// Additional arguments to `rustfmt`.
 260         rustfmt_extraArgs: Vec<String>               = "[]",
 261         /// Advanced option, fully override the command rust-analyzer uses for
 262         /// formatting.
 263         rustfmt_overrideCommand: Option<Vec<String>> = "null",
 264         /// Enables the use of rustfmt's unstable range formatting command for the
 265         /// `textDocument/rangeFormatting` request. The rustfmt option is unstable and only
 266         /// available on a nightly build.
 267         rustfmt_enableRangeFormatting: bool = "false",
 268
 269         /// Workspace symbol search scope.
 270         workspace_symbol_search_scope: WorskpaceSymbolSearchScopeDef = "\"workspace\"",
 271         /// Workspace symbol search kind.
 272         workspace_symbol_search_kind: WorskpaceSymbolSearchKindDef = "\"only_types\"",
 273     }
 274 }
 275
 276 impl Default for ConfigData {
 277     fn default() -> Self {
 278         ConfigData::from_json(serde_json::Value::Null)
 279     }
 280 }
 281
 282 #[derive(Debug, Clone)]
 283 pub struct Config {
 284     pub caps: lsp_types::ClientCapabilities,
 285     data: ConfigData,
 286     detached_files: Vec<AbsPathBuf>,
 287     pub discovered_projects: Option<Vec<ProjectManifest>>,
 288     pub root_path: AbsPathBuf,
 289 }
 290
 291 #[derive(Debug, Clone, Eq, PartialEq)]
 292 pub enum LinkedProject {
 293     ProjectManifest(ProjectManifest),
 294     InlineJsonProject(ProjectJson),
 295 }
 296
 297 impl From<ProjectManifest> for LinkedProject {
 298     fn from(v: ProjectManifest) -> Self {
 299         LinkedProject::ProjectManifest(v)
 300     }
 301 }
 302
 303 impl From<ProjectJson> for LinkedProject {
 304     fn from(v: ProjectJson) -> Self {
 305         LinkedProject::InlineJsonProject(v)
 306     }
 307 }
 308
 309 #[derive(Clone, Debug, PartialEq, Eq)]
 310 pub struct LensConfig {
 311     pub run: bool,
 312     pub debug: bool,
 313     pub implementations: bool,
 314     pub method_refs: bool,
 315     pub refs: bool, // for Struct, Enum, Union and Trait
 316 }
 317
 318 impl LensConfig {
 319     pub fn any(&self) -> bool {
 320         self.implementations || self.runnable() || self.references()
 321     }
 322
 323     pub fn none(&self) -> bool {
 324         !self.any()
 325     }
 326
 327     pub fn runnable(&self) -> bool {
 328         self.run || self.debug
 329     }
 330
 331     pub fn references(&self) -> bool {
 332         self.method_refs || self.refs
 333     }
 334 }
 335
 336 #[derive(Clone, Debug, PartialEq, Eq)]
 337 pub struct HoverActionsConfig {
 338     pub implementations: bool,
 339     pub references: bool,
 340     pub run: bool,
 341     pub debug: bool,
 342     pub goto_type_def: bool,
 343 }
 344
 345 impl HoverActionsConfig {
 346     pub const NO_ACTIONS: Self = Self {
 347         implementations: false,
 348         references: false,
 349         run: false,
 350         debug: false,
 351         goto_type_def: false,
 352     };
 353
 354     pub fn any(&self) -> bool {
 355         self.implementations || self.references || self.runnable() || self.goto_type_def
 356     }
 357
 358     pub fn none(&self) -> bool {
 359         !self.any()
 360     }
 361
 362     pub fn runnable(&self) -> bool {
 363         self.run || self.debug
 364     }
 365 }
 366
 367 #[derive(Debug, Clone)]
 368 pub struct FilesConfig {
 369     pub watcher: FilesWatcher,
 370     pub exclude: Vec<AbsPathBuf>,
 371 }
 372
 373 #[derive(Debug, Clone)]
 374 pub enum FilesWatcher {
 375     Client,
 376     Notify,
 377 }
 378
 379 #[derive(Debug, Clone)]
 380 pub struct NotificationsConfig {
 381     pub cargo_toml_not_found: bool,
 382 }
 383
 384 #[derive(Debug, Clone)]
 385 pub enum RustfmtConfig {
 386     Rustfmt { extra_args: Vec<String>, enable_range_formatting: bool },
 387     CustomCommand { command: String, args: Vec<String> },
 388 }
 389
 390 /// Configuration for runnable items, such as `main` function or tests.
 391 #[derive(Debug, Clone)]
 392 pub struct RunnablesConfig {
 393     /// Custom command to be executed instead of `cargo` for runnables.
 394     pub override_cargo: Option<String>,
 395     /// Additional arguments for the `cargo`, e.g. `--release`.
 396     pub cargo_extra_args: Vec<String>,
 397 }
 398
 399 /// Configuration for workspace symbol search requests.
 400 #[derive(Debug, Clone)]
 401 pub struct WorkspaceSymbolConfig {
 402     /// In what scope should the symbol be searched in.
 403     pub search_scope: WorkspaceSymbolSearchScope,
 404     /// What kind of symbol is being search for.
 405     pub search_kind: WorkspaceSymbolSearchKind,
 406 }
 407
 408 impl Config {
 409     pub fn new(root_path: AbsPathBuf, caps: ClientCapabilities) -> Self {
 410         Config {
 411             caps,
 412             data: ConfigData::default(),
 413             detached_files: Vec::new(),
 414             discovered_projects: None,
 415             root_path,
 416         }
 417     }
 418     pub fn update(&mut self, mut json: serde_json::Value) {
 419         log::info!("updating config from JSON: {:#}", json);
 420         if json.is_null() || json.as_object().map_or(false, |it| it.is_empty()) {
 421             return;
 422         }
 423         self.detached_files = get_field::<Vec<PathBuf>>(&mut json, "detachedFiles", None, "[]")
 424             .into_iter()
 425             .map(AbsPathBuf::assert)
 426             .collect();
 427         self.data = ConfigData::from_json(json);
 428     }
 429
 430     pub fn json_schema() -> serde_json::Value {
 431         ConfigData::json_schema()
 432     }
 433 }
 434
 435 macro_rules! try_ {
 436     ($expr:expr) => {
 437         || -> _ { Some($expr) }()
 438     };
 439 }
 440 macro_rules! try_or {
 441     ($expr:expr, $or:expr) => {
 442         try_!($expr).unwrap_or($or)
 443     };
 444 }
 445
 446 impl Config {
 447     pub fn linked_projects(&self) -> Vec<LinkedProject> {
 448         if self.data.linkedProjects.is_empty() {
 449             self.discovered_projects
 450                 .as_ref()
 451                 .into_iter()
 452                 .flatten()
 453                 .cloned()
 454                 .map(LinkedProject::from)
 455                 .collect()
 456         } else {
 457             self.data
 458                 .linkedProjects
 459                 .iter()
 460                 .filter_map(|linked_project| {
 461                     let res = match linked_project {
 462                         ManifestOrProjectJson::Manifest(it) => {
 463                             let path = self.root_path.join(it);
 464                             ProjectManifest::from_manifest_file(path)
 465                                 .map_err(|e| log::error!("failed to load linked project: {}", e))
 466                                 .ok()?
 467                                 .into()
 468                         }
 469                         ManifestOrProjectJson::ProjectJson(it) => {
 470                             ProjectJson::new(&self.root_path, it.clone()).into()
 471                         }
 472                     };
 473                     Some(res)
 474                 })
 475                 .collect()
 476         }
 477     }
 478
 479     pub fn detached_files(&self) -> &[AbsPathBuf] {
 480         &self.detached_files
 481     }
 482
 483     pub fn did_save_text_document_dynamic_registration(&self) -> bool {
 484         let caps =
 485             try_or!(self.caps.text_document.as_ref()?.synchronization.clone()?, Default::default());
 486         caps.did_save == Some(true) && caps.dynamic_registration == Some(true)
 487     }
 488     pub fn did_change_watched_files_dynamic_registration(&self) -> bool {
 489         try_or!(
 490             self.caps.workspace.as_ref()?.did_change_watched_files.as_ref()?.dynamic_registration?,
 491             false
 492         )
 493     }
 494
 495     pub fn location_link(&self) -> bool {
 496         try_or!(self.caps.text_document.as_ref()?.definition?.link_support?, false)
 497     }
 498     pub fn line_folding_only(&self) -> bool {
 499         try_or!(self.caps.text_document.as_ref()?.folding_range.as_ref()?.line_folding_only?, false)
 500     }
 501     pub fn hierarchical_symbols(&self) -> bool {
 502         try_or!(
 503             self.caps
 504                 .text_document
 505                 .as_ref()?
 506                 .document_symbol
 507                 .as_ref()?
 508                 .hierarchical_document_symbol_support?,
 509             false
 510         )
 511     }
 512     pub fn code_action_literals(&self) -> bool {
 513         try_!(self
 514             .caps
 515             .text_document
 516             .as_ref()?
 517             .code_action
 518             .as_ref()?
 519             .code_action_literal_support
 520             .as_ref()?)
 521         .is_some()
 522     }
 523     pub fn work_done_progress(&self) -> bool {
 524         try_or!(self.caps.window.as_ref()?.work_done_progress?, false)
 525     }
 526     pub fn will_rename(&self) -> bool {
 527         try_or!(self.caps.workspace.as_ref()?.file_operations.as_ref()?.will_rename?, false)
 528     }
 529     pub fn change_annotation_support(&self) -> bool {
 530         try_!(self
 531             .caps
 532             .workspace
 533             .as_ref()?
 534             .workspace_edit
 535             .as_ref()?
 536             .change_annotation_support
 537             .as_ref()?)
 538         .is_some()
 539     }
 540     pub fn code_action_resolve(&self) -> bool {
 541         try_or!(
 542             self.caps
 543                 .text_document
 544                 .as_ref()?
 545                 .code_action
 546                 .as_ref()?
 547                 .resolve_support
 548                 .as_ref()?
 549                 .properties
 550                 .as_slice(),
 551             &[]
 552         )
 553         .iter()
 554         .any(|it| it == "edit")
 555     }
 556     pub fn signature_help_label_offsets(&self) -> bool {
 557         try_or!(
 558             self.caps
 559                 .text_document
 560                 .as_ref()?
 561                 .signature_help
 562                 .as_ref()?
 563                 .signature_information
 564                 .as_ref()?
 565                 .parameter_information
 566                 .as_ref()?
 567                 .label_offset_support?,
 568             false
 569         )
 570     }
 571     pub fn offset_encoding(&self) -> OffsetEncoding {
 572         if supports_utf8(&self.caps) {
 573             OffsetEncoding::Utf8
 574         } else {
 575             OffsetEncoding::Utf16
 576         }
 577     }
 578
 579     fn experimental(&self, index: &'static str) -> bool {
 580         try_or!(self.caps.experimental.as_ref()?.get(index)?.as_bool()?, false)
 581     }
 582     pub fn code_action_group(&self) -> bool {
 583         self.experimental("codeActionGroup")
 584     }
 585     pub fn experimental_hover_actions(&self) -> bool {
 586         self.experimental("hoverActions")
 587     }
 588     pub fn server_status_notification(&self) -> bool {
 589         self.experimental("serverStatusNotification")
 590     }
 591
 592     pub fn publish_diagnostics(&self) -> bool {
 593         self.data.diagnostics_enable
 594     }
 595     pub fn diagnostics(&self) -> DiagnosticsConfig {
 596         DiagnosticsConfig {
 597             disable_experimental: !self.data.diagnostics_enableExperimental,
 598             disabled: self.data.diagnostics_disabled.clone(),
 599         }
 600     }
 601     pub fn diagnostics_map(&self) -> DiagnosticsMapConfig {
 602         DiagnosticsMapConfig {
 603             remap_prefix: self.data.diagnostics_remapPrefix.clone(),
 604             warnings_as_info: self.data.diagnostics_warningsAsInfo.clone(),
 605             warnings_as_hint: self.data.diagnostics_warningsAsHint.clone(),
 606         }
 607     }
 608     pub fn lru_capacity(&self) -> Option<usize> {
 609         self.data.lruCapacity
 610     }
 611     pub fn proc_macro_srv(&self) -> Option<(AbsPathBuf, Vec<OsString>)> {
 612         if !self.data.procMacro_enable {
 613             return None;
 614         }
 615         let path = match &self.data.procMacro_server {
 616             Some(it) => self.root_path.join(it),
 617             None => AbsPathBuf::assert(std::env::current_exe().ok()?),
 618         };
 619         Some((path, vec!["proc-macro".into()]))
 620     }
 621     pub fn expand_proc_attr_macros(&self) -> bool {
 622         self.data.experimental_procAttrMacros
 623     }
 624     pub fn files(&self) -> FilesConfig {
 625         FilesConfig {
 626             watcher: match self.data.files_watcher.as_str() {
 627                 "notify" => FilesWatcher::Notify,
 628                 "client" | _ => FilesWatcher::Client,
 629             },
 630             exclude: self.data.files_excludeDirs.iter().map(|it| self.root_path.join(it)).collect(),
 631         }
 632     }
 633     pub fn notifications(&self) -> NotificationsConfig {
 634         NotificationsConfig { cargo_toml_not_found: self.data.notifications_cargoTomlNotFound }
 635     }
 636     pub fn cargo_autoreload(&self) -> bool {
 637         self.data.cargo_autoreload
 638     }
 639     pub fn run_build_scripts(&self) -> bool {
 640         self.data.cargo_runBuildScripts || self.data.procMacro_enable
 641     }
 642     pub fn cargo(&self) -> CargoConfig {
 643         let rustc_source = self.data.rustcSource.as_ref().map(|rustc_src| {
 644             if rustc_src == "discover" {
 645                 RustcSource::Discover
 646             } else {
 647                 RustcSource::Path(self.root_path.join(rustc_src))
 648             }
 649         });
 650
 651         CargoConfig {
 652             no_default_features: self.data.cargo_noDefaultFeatures,
 653             all_features: self.data.cargo_allFeatures,
 654             features: self.data.cargo_features.clone(),
 655             target: self.data.cargo_target.clone(),
 656             rustc_source,
 657             no_sysroot: self.data.cargo_noSysroot,
 658             unset_test_crates: self.data.cargo_unsetTest.clone(),
 659             wrap_rustc_in_build_scripts: self.data.cargo_useRustcWrapperForBuildScripts,
 660         }
 661     }
 662
 663     pub fn rustfmt(&self) -> RustfmtConfig {
 664         match &self.data.rustfmt_overrideCommand {
 665             Some(args) if !args.is_empty() => {
 666                 let mut args = args.clone();
 667                 let command = args.remove(0);
 668                 RustfmtConfig::CustomCommand { command, args }
 669             }
 670             Some(_) | None => RustfmtConfig::Rustfmt {
 671                 extra_args: self.data.rustfmt_extraArgs.clone(),
 672                 enable_range_formatting: self.data.rustfmt_enableRangeFormatting,
 673             },
 674         }
 675     }
 676     pub fn flycheck(&self) -> Option<FlycheckConfig> {
 677         if !self.data.checkOnSave_enable {
 678             return None;
 679         }
 680         let flycheck_config = match &self.data.checkOnSave_overrideCommand {
 681             Some(args) if !args.is_empty() => {
 682                 let mut args = args.clone();
 683                 let command = args.remove(0);
 684                 FlycheckConfig::CustomCommand { command, args }
 685             }
 686             Some(_) | None => FlycheckConfig::CargoCommand {
 687                 command: self.data.checkOnSave_command.clone(),
 688                 target_triple: self
 689                     .data
 690                     .checkOnSave_target
 691                     .clone()
 692                     .or_else(|| self.data.cargo_target.clone()),
 693                 all_targets: self.data.checkOnSave_allTargets,
 694                 no_default_features: self
 695                     .data
 696                     .checkOnSave_noDefaultFeatures
 697                     .unwrap_or(self.data.cargo_noDefaultFeatures),
 698                 all_features: self
 699                     .data
 700                     .checkOnSave_allFeatures
 701                     .unwrap_or(self.data.cargo_allFeatures),
 702                 features: self
 703                     .data
 704                     .checkOnSave_features
 705                     .clone()
 706                     .unwrap_or_else(|| self.data.cargo_features.clone()),
 707                 extra_args: self.data.checkOnSave_extraArgs.clone(),
 708             },
 709         };
 710         Some(flycheck_config)
 711     }
 712     pub fn runnables(&self) -> RunnablesConfig {
 713         RunnablesConfig {
 714             override_cargo: self.data.runnables_overrideCargo.clone(),
 715             cargo_extra_args: self.data.runnables_cargoExtraArgs.clone(),
 716         }
 717     }
 718     pub fn inlay_hints(&self) -> InlayHintsConfig {
 719         InlayHintsConfig {
 720             type_hints: self.data.inlayHints_typeHints,
 721             parameter_hints: self.data.inlayHints_parameterHints,
 722             chaining_hints: self.data.inlayHints_chainingHints,
 723             max_length: self.data.inlayHints_maxLength,
 724         }
 725     }
 726     fn insert_use_config(&self) -> InsertUseConfig {
 727         InsertUseConfig {
 728             granularity: match self.data.assist_importGranularity {
 729                 ImportGranularityDef::Preserve => ImportGranularity::Preserve,
 730                 ImportGranularityDef::Item => ImportGranularity::Item,
 731                 ImportGranularityDef::Crate => ImportGranularity::Crate,
 732                 ImportGranularityDef::Module => ImportGranularity::Module,
 733             },
 734             enforce_granularity: self.data.assist_importEnforceGranularity,
 735             prefix_kind: match self.data.assist_importPrefix {
 736                 ImportPrefixDef::Plain => PrefixKind::Plain,
 737                 ImportPrefixDef::ByCrate => PrefixKind::ByCrate,
 738                 ImportPrefixDef::BySelf => PrefixKind::BySelf,
 739             },
 740             group: self.data.assist_importGroup,
 741             skip_glob_imports: !self.data.assist_allowMergingIntoGlobImports,
 742         }
 743     }
 744     pub fn completion(&self) -> CompletionConfig {
 745         CompletionConfig {
 746             enable_postfix_completions: self.data.completion_postfix_enable,
 747             enable_imports_on_the_fly: self.data.completion_autoimport_enable
 748                 && completion_item_edit_resolve(&self.caps),
 749             enable_self_on_the_fly: self.data.completion_autoself_enable,
 750             add_call_parenthesis: self.data.completion_addCallParenthesis,
 751             add_call_argument_snippets: self.data.completion_addCallArgumentSnippets,
 752             insert_use: self.insert_use_config(),
 753             snippet_cap: SnippetCap::new(try_or!(
 754                 self.caps
 755                     .text_document
 756                     .as_ref()?
 757                     .completion
 758                     .as_ref()?
 759                     .completion_item
 760                     .as_ref()?
 761                     .snippet_support?,
 762                 false
 763             )),
 764         }
 765     }
 766     pub fn assist(&self) -> AssistConfig {
 767         AssistConfig {
 768             snippet_cap: SnippetCap::new(self.experimental("snippetTextEdit")),
 769             allowed: None,
 770             insert_use: self.insert_use_config(),
 771         }
 772     }
 773     pub fn join_lines(&self) -> JoinLinesConfig {
 774         JoinLinesConfig {
 775             join_else_if: self.data.joinLines_joinElseIf,
 776             remove_trailing_comma: self.data.joinLines_removeTrailingComma,
 777             unwrap_trivial_blocks: self.data.joinLines_unwrapTrivialBlock,
 778         }
 779     }
 780     pub fn call_info_full(&self) -> bool {
 781         self.data.callInfo_full
 782     }
 783     pub fn lens(&self) -> LensConfig {
 784         LensConfig {
 785             run: self.data.lens_enable && self.data.lens_run,
 786             debug: self.data.lens_enable && self.data.lens_debug,
 787             implementations: self.data.lens_enable && self.data.lens_implementations,
 788             method_refs: self.data.lens_enable && self.data.lens_methodReferences,
 789             refs: self.data.lens_enable && self.data.lens_references,
 790         }
 791     }
 792     pub fn hover_actions(&self) -> HoverActionsConfig {
 793         HoverActionsConfig {
 794             implementations: self.data.hoverActions_enable
 795                 && self.data.hoverActions_implementations,
 796             references: self.data.hoverActions_enable && self.data.hoverActions_references,
 797             run: self.data.hoverActions_enable && self.data.hoverActions_run,
 798             debug: self.data.hoverActions_enable && self.data.hoverActions_debug,
 799             goto_type_def: self.data.hoverActions_enable && self.data.hoverActions_gotoTypeDef,
 800         }
 801     }
 802     pub fn highlighting_strings(&self) -> bool {
 803         self.data.highlighting_strings
 804     }
 805     pub fn hover(&self) -> HoverConfig {
 806         HoverConfig {
 807             links_in_hover: self.data.hover_linksInHover,
 808             documentation: self.data.hover_documentation.then(|| {
 809                 let is_markdown = try_or!(
 810                     self.caps
 811                         .text_document
 812                         .as_ref()?
 813                         .hover
 814                         .as_ref()?
 815                         .content_format
 816                         .as_ref()?
 817                         .as_slice(),
 818                     &[]
 819                 )
 820                 .contains(&MarkupKind::Markdown);
 821                 if is_markdown {
 822                     HoverDocFormat::Markdown
 823                 } else {
 824                     HoverDocFormat::PlainText
 825                 }
 826             }),
 827         }
 828     }
 829
 830     pub fn workspace_symbol(&self) -> WorkspaceSymbolConfig {
 831         WorkspaceSymbolConfig {
 832             search_scope: match self.data.workspace_symbol_search_scope {
 833                 WorskpaceSymbolSearchScopeDef::Workspace => WorkspaceSymbolSearchScope::Workspace,
 834                 WorskpaceSymbolSearchScopeDef::WorkspaceAndDependencies => {
 835                     WorkspaceSymbolSearchScope::WorkspaceAndDependencies
 836                 }
 837             },
 838             search_kind: match self.data.workspace_symbol_search_kind {
 839                 WorskpaceSymbolSearchKindDef::OnlyTypes => WorkspaceSymbolSearchKind::OnlyTypes,
 840                 WorskpaceSymbolSearchKindDef::AllSymbols => WorkspaceSymbolSearchKind::AllSymbols,
 841             },
 842         }
 843     }
 844
 845     pub fn semantic_tokens_refresh(&self) -> bool {
 846         try_or!(self.caps.workspace.as_ref()?.semantic_tokens.as_ref()?.refresh_support?, false)
 847     }
 848     pub fn code_lens_refresh(&self) -> bool {
 849         try_or!(self.caps.workspace.as_ref()?.code_lens.as_ref()?.refresh_support?, false)
 850     }
 851     pub fn insert_replace_support(&self) -> bool {
 852         try_or!(
 853             self.caps
 854                 .text_document
 855                 .as_ref()?
 856                 .completion
 857                 .as_ref()?
 858                 .completion_item
 859                 .as_ref()?
 860                 .insert_replace_support?,
 861             false
 862         )
 863     }
 864
 865     pub fn highlight_related(&self) -> HighlightRelatedConfig {
 866         HighlightRelatedConfig {
 867             references: self.data.highlightRelated_references,
 868             break_points: self.data.highlightRelated_breakPoints,
 869             exit_points: self.data.highlightRelated_exitPoints,
 870             yield_points: self.data.highlightRelated_yieldPoints,
 871         }
 872     }
 873 }
 874
 875 #[derive(Deserialize, Debug, Clone)]
 876 #[serde(untagged)]
 877 enum ManifestOrProjectJson {
 878     Manifest(PathBuf),
 879     ProjectJson(ProjectJsonData),
 880 }
 881
 882 #[derive(Deserialize, Debug, Clone)]
 883 #[serde(rename_all = "snake_case")]
 884 enum ImportGranularityDef {
 885     Preserve,
 886     #[serde(alias = "none")]
 887     Item,
 888     #[serde(alias = "full")]
 889     Crate,
 890     #[serde(alias = "last")]
 891     Module,
 892 }
 893
 894 #[derive(Deserialize, Debug, Clone)]
 895 #[serde(rename_all = "snake_case")]
 896 enum ImportPrefixDef {
 897     Plain,
 898     #[serde(alias = "self")]
 899     BySelf,
 900     #[serde(alias = "crate")]
 901     ByCrate,
 902 }
 903
 904 #[derive(Deserialize, Debug, Clone)]
 905 #[serde(rename_all = "snake_case")]
 906 enum WorskpaceSymbolSearchScopeDef {
 907     Workspace,
 908     WorkspaceAndDependencies,
 909 }
 910
 911 #[derive(Deserialize, Debug, Clone)]
 912 #[serde(rename_all = "snake_case")]
 913 enum WorskpaceSymbolSearchKindDef {
 914     OnlyTypes,
 915     AllSymbols,
 916 }
 917
 918 macro_rules! _config_data {
 919     (struct $name:ident {
 920         $(
 921             $(#[doc=$doc:literal])*
 922             $field:ident $(| $alias:ident)*: $ty:ty = $default:expr,
 923         )*
 924     }) => {
 925         #[allow(non_snake_case)]
 926         #[derive(Debug, Clone)]
 927         struct $name { $($field: $ty,)* }
 928         impl $name {
 929             fn from_json(mut json: serde_json::Value) -> $name {
 930                 $name {$(
 931                     $field: get_field(
 932                         &mut json,
 933                         stringify!($field),
 934                         None$(.or(Some(stringify!($alias))))*,
 935                         $default,
 936                     ),
 937                 )*}
 938             }
 939
 940             fn json_schema() -> serde_json::Value {
 941                 schema(&[
 942                     $({
 943                         let field = stringify!($field);
 944                         let ty = stringify!($ty);
 945
 946                         (field, ty, &[$($doc),*], $default)
 947                     },)*
 948                 ])
 949             }
 950
 951             #[cfg(test)]
 952             fn manual() -> String {
 953                 manual(&[
 954                     $({
 955                         let field = stringify!($field);
 956                         let ty = stringify!($ty);
 957
 958                         (field, ty, &[$($doc),*], $default)
 959                     },)*
 960                 ])
 961             }
 962         }
 963     };
 964 }
 965 use _config_data as config_data;
 966
 967 fn get_field<T: DeserializeOwned>(
 968     json: &mut serde_json::Value,
 969     field: &'static str,
 970     alias: Option<&'static str>,
 971     default: &str,
 972 ) -> T {
 973     let default = serde_json::from_str(default).unwrap();
 974
 975     // XXX: check alias first, to work-around the VS Code where it pre-fills the
 976     // defaults instead of sending an empty object.
 977     alias
 978         .into_iter()
 979         .chain(iter::once(field))
 980         .find_map(move |field| {
 981             let mut pointer = field.replace('_', "/");
 982             pointer.insert(0, '/');
 983             json.pointer_mut(&pointer).and_then(|it| serde_json::from_value(it.take()).ok())
 984         })
 985         .unwrap_or(default)
 986 }
 987
 988 fn schema(fields: &[(&'static str, &'static str, &[&str], &str)]) -> serde_json::Value {
 989     for ((f1, ..), (f2, ..)) in fields.iter().zip(&fields[1..]) {
 990         fn key(f: &str) -> &str {
 991             f.splitn(2, '_').next().unwrap()
 992         }
 993         assert!(key(f1) <= key(f2), "wrong field order: {:?} {:?}", f1, f2);
 994     }
 995
 996     let map = fields
 997         .iter()
 998         .map(|(field, ty, doc, default)| {
 999             let name = field.replace("_", ".");
1000             let name = format!("rust-analyzer.{}", name);
1001             let props = field_props(field, ty, doc, default);
1002             (name, props)
1003         })
1004         .collect::<serde_json::Map<_, _>>();
1005     map.into()
1006 }
1007
1008 fn field_props(field: &str, ty: &str, doc: &[&str], default: &str) -> serde_json::Value {
1009     let doc = doc_comment_to_string(doc);
1010     let doc = doc.trim_end_matches('\n');
1011     assert!(
1012         doc.ends_with('.') && doc.starts_with(char::is_uppercase),
1013         "bad docs for {}: {:?}",
1014         field,
1015         doc
1016     );
1017     let default = default.parse::<serde_json::Value>().unwrap();
1018
1019     let mut map = serde_json::Map::default();
1020     macro_rules! set {
1021         ($($key:literal: $value:tt),*$(,)?) => {{$(
1022             map.insert($key.into(), serde_json::json!($value));
1023         )*}};
1024     }
1025     set!("markdownDescription": doc);
1026     set!("default": default);
1027
1028     match ty {
1029         "bool" => set!("type": "boolean"),
1030         "String" => set!("type": "string"),
1031         "Vec<String>" => set! {
1032             "type": "array",
1033             "items": { "type": "string" },
1034         },
1035         "Vec<PathBuf>" => set! {
1036             "type": "array",
1037             "items": { "type": "string" },
1038         },
1039         "FxHashSet<String>" => set! {
1040             "type": "array",
1041             "items": { "type": "string" },
1042             "uniqueItems": true,
1043         },
1044         "FxHashMap<String, String>" => set! {
1045             "type": "object",
1046         },
1047         "Option<usize>" => set! {
1048             "type": ["null", "integer"],
1049             "minimum": 0,
1050         },
1051         "Option<String>" => set! {
1052             "type": ["null", "string"],
1053         },
1054         "Option<PathBuf>" => set! {
1055             "type": ["null", "string"],
1056         },
1057         "Option<bool>" => set! {
1058             "type": ["null", "boolean"],
1059         },
1060         "Option<Vec<String>>" => set! {
1061             "type": ["null", "array"],
1062             "items": { "type": "string" },
1063         },
1064         "MergeBehaviorDef" => set! {
1065             "type": "string",
1066             "enum": ["none", "crate", "module"],
1067             "enumDescriptions": [
1068                 "Do not merge imports at all.",
1069                 "Merge imports from the same crate into a single `use` statement.",
1070                 "Merge imports from the same module into a single `use` statement."
1071             ],
1072         },
1073         "ImportGranularityDef" => set! {
1074             "type": "string",
1075             "enum": ["preserve", "crate", "module", "item"],
1076             "enumDescriptions": [
1077                 "Do not change the granularity of any imports and preserve the original structure written by the developer.",
1078                 "Merge imports from the same crate into a single use statement. Conversely, imports from different crates are split into separate statements.",
1079                 "Merge imports from the same module into a single use statement. Conversely, imports from different modules are split into separate statements.",
1080                 "Flatten imports so that each has its own use statement."
1081             ],
1082         },
1083         "ImportPrefixDef" => set! {
1084             "type": "string",
1085             "enum": [
1086                 "plain",
1087                 "self",
1088                 "crate"
1089             ],
1090             "enumDescriptions": [
1091                 "Insert import paths relative to the current module, using up to one `super` prefix if the parent module contains the requested item.",
1092                 "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.",
1093                 "Force import paths to be absolute by always starting them with `crate` or the extern crate name they come from."
1094             ],
1095         },
1096         "Vec<ManifestOrProjectJson>" => set! {
1097             "type": "array",
1098             "items": { "type": ["string", "object"] },
1099         },
1100         "WorskpaceSymbolSearchScopeDef" => set! {
1101             "type": "string",
1102             "enum": ["workspace", "workspace_and_dependencies"],
1103             "enumDescriptions": [
1104                 "Search in current workspace only",
1105                 "Search in current workspace and dependencies"
1106             ],
1107         },
1108         "WorskpaceSymbolSearchKindDef" => set! {
1109             "type": "string",
1110             "enum": ["only_types", "all_symbols"],
1111             "enumDescriptions": [
1112                 "Search for types only",
1113                 "Search for all symbols kinds"
1114             ],
1115         },
1116         _ => panic!("{}: {}", ty, default),
1117     }
1118
1119     map.into()
1120 }
1121
1122 #[cfg(test)]
1123 fn manual(fields: &[(&'static str, &'static str, &[&str], &str)]) -> String {
1124     fields
1125         .iter()
1126         .map(|(field, _ty, doc, default)| {
1127             let name = format!("rust-analyzer.{}", field.replace("_", "."));
1128             let doc = doc_comment_to_string(*doc);
1129             format!("[[{}]]{} (default: `{}`)::\n+\n--\n{}--\n", name, name, default, doc)
1130         })
1131         .collect::<String>()
1132 }
1133
1134 fn doc_comment_to_string(doc: &[&str]) -> String {
1135     doc.iter().map(|it| it.strip_prefix(' ').unwrap_or(it)).map(|it| format!("{}\n", it)).collect()
1136 }
1137
1138 #[cfg(test)]
1139 mod tests {
1140     use std::fs;
1141
1142     use test_utils::{ensure_file_contents, project_root};
1143
1144     use super::*;
1145
1146     #[test]
1147     fn generate_package_json_config() {
1148         let s = Config::json_schema();
1149         let schema = format!("{:#}", s);
1150         let mut schema = schema
1151             .trim_start_matches('{')
1152             .trim_end_matches('}')
1153             .replace("  ", "    ")
1154             .replace("\n", "\n            ")
1155             .trim_start_matches('\n')
1156             .trim_end()
1157             .to_string();
1158         schema.push_str(",\n");
1159
1160         let package_json_path = project_root().join("editors/code/package.json");
1161         let mut package_json = fs::read_to_string(&package_json_path).unwrap();
1162
1163         let start_marker = "                \"$generated-start\": {},\n";
1164         let end_marker = "                \"$generated-end\": {}\n";
1165
1166         let start = package_json.find(start_marker).unwrap() + start_marker.len();
1167         let end = package_json.find(end_marker).unwrap();
1168
1169         let p = remove_ws(&package_json[start..end]);
1170         let s = remove_ws(&schema);
1171         if !p.contains(&s) {
1172             package_json.replace_range(start..end, &schema);
1173             ensure_file_contents(&package_json_path, &package_json)
1174         }
1175     }
1176
1177     #[test]
1178     fn generate_config_documentation() {
1179         let docs_path = project_root().join("docs/user/generated_config.adoc");
1180         let expected = ConfigData::manual();
1181         ensure_file_contents(&docs_path, &expected);
1182     }
1183
1184     fn remove_ws(text: &str) -> String {
1185         text.replace(char::is_whitespace, "")
1186     }
1187 }