1use anyhow::{Context as _, Result};
2use async_trait::async_trait;
3use collections::HashMap;
4use futures::StreamExt;
5use gpui::{App, AppContext, AsyncApp, SharedString, Task};
6use http_client::github::AssetKind;
7use http_client::github::{GitHubLspBinaryVersion, latest_github_release};
8pub use language::*;
9use lsp::{InitializeParams, LanguageServerBinary};
10use project::Fs;
11use project::lsp_store::rust_analyzer_ext::CARGO_DIAGNOSTICS_SOURCE_NAME;
12use project::project_settings::ProjectSettings;
13use regex::Regex;
14use serde_json::json;
15use settings::Settings as _;
16use smol::fs::{self};
17use std::fmt::Display;
18use std::{
19 any::Any,
20 borrow::Cow,
21 path::{Path, PathBuf},
22 sync::{Arc, LazyLock},
23};
24use task::{TaskTemplate, TaskTemplates, TaskVariables, VariableName};
25use util::fs::make_file_executable;
26use util::merge_json_value_into;
27use util::{ResultExt, maybe};
28
29use crate::github_download::{GithubBinaryMetadata, download_server_binary};
30use crate::language_settings::language_settings;
31
32pub struct RustLspAdapter;
33
34#[cfg(target_os = "macos")]
35impl RustLspAdapter {
36 const GITHUB_ASSET_KIND: AssetKind = AssetKind::Gz;
37 const ARCH_SERVER_NAME: &str = "apple-darwin";
38}
39
40#[cfg(target_os = "linux")]
41impl RustLspAdapter {
42 const GITHUB_ASSET_KIND: AssetKind = AssetKind::Gz;
43 const ARCH_SERVER_NAME: &str = "unknown-linux-gnu";
44}
45
46#[cfg(target_os = "freebsd")]
47impl RustLspAdapter {
48 const GITHUB_ASSET_KIND: AssetKind = AssetKind::Gz;
49 const ARCH_SERVER_NAME: &str = "unknown-freebsd";
50}
51
52#[cfg(target_os = "windows")]
53impl RustLspAdapter {
54 const GITHUB_ASSET_KIND: AssetKind = AssetKind::Zip;
55 const ARCH_SERVER_NAME: &str = "pc-windows-msvc";
56}
57
58const SERVER_NAME: LanguageServerName = LanguageServerName::new_static("rust-analyzer");
59
60impl RustLspAdapter {
61 fn build_asset_name() -> String {
62 let extension = match Self::GITHUB_ASSET_KIND {
63 AssetKind::TarGz => "tar.gz",
64 AssetKind::Gz => "gz",
65 AssetKind::Zip => "zip",
66 };
67
68 format!(
69 "{}-{}-{}.{}",
70 SERVER_NAME,
71 std::env::consts::ARCH,
72 Self::ARCH_SERVER_NAME,
73 extension
74 )
75 }
76}
77
78pub(crate) struct CargoManifestProvider;
79
80impl ManifestProvider for CargoManifestProvider {
81 fn name(&self) -> ManifestName {
82 SharedString::new_static("Cargo.toml").into()
83 }
84
85 fn search(
86 &self,
87 ManifestQuery {
88 path,
89 depth,
90 delegate,
91 }: ManifestQuery,
92 ) -> Option<Arc<Path>> {
93 let mut outermost_cargo_toml = None;
94 for path in path.ancestors().take(depth) {
95 let p = path.join("Cargo.toml");
96 if delegate.exists(&p, Some(false)) {
97 outermost_cargo_toml = Some(Arc::from(path));
98 }
99 }
100
101 outermost_cargo_toml
102 }
103}
104
105#[async_trait(?Send)]
106impl LspAdapter for RustLspAdapter {
107 fn name(&self) -> LanguageServerName {
108 SERVER_NAME.clone()
109 }
110
111 fn manifest_name(&self) -> Option<ManifestName> {
112 Some(SharedString::new_static("Cargo.toml").into())
113 }
114
115 async fn check_if_user_installed(
116 &self,
117 delegate: &dyn LspAdapterDelegate,
118 _: Arc<dyn LanguageToolchainStore>,
119 _: &AsyncApp,
120 ) -> Option<LanguageServerBinary> {
121 let path = delegate.which("rust-analyzer".as_ref()).await?;
122 let env = delegate.shell_env().await;
123
124 // It is surprisingly common for ~/.cargo/bin/rust-analyzer to be a symlink to
125 // /usr/bin/rust-analyzer that fails when you run it; so we need to test it.
126 log::info!("found rust-analyzer in PATH. trying to run `rust-analyzer --help`");
127 let result = delegate
128 .try_exec(LanguageServerBinary {
129 path: path.clone(),
130 arguments: vec!["--help".into()],
131 env: Some(env.clone()),
132 })
133 .await;
134 if let Err(err) = result {
135 log::debug!(
136 "failed to run rust-analyzer after detecting it in PATH: binary: {:?}: {}",
137 path,
138 err
139 );
140 return None;
141 }
142
143 Some(LanguageServerBinary {
144 path,
145 env: Some(env),
146 arguments: vec![],
147 })
148 }
149
150 async fn fetch_latest_server_version(
151 &self,
152 delegate: &dyn LspAdapterDelegate,
153 ) -> Result<Box<dyn 'static + Send + Any>> {
154 let release = latest_github_release(
155 "rust-lang/rust-analyzer",
156 true,
157 false,
158 delegate.http_client(),
159 )
160 .await?;
161 let asset_name = Self::build_asset_name();
162 let asset = release
163 .assets
164 .iter()
165 .find(|asset| asset.name == asset_name)
166 .with_context(|| format!("no asset found matching `{asset_name:?}`"))?;
167 Ok(Box::new(GitHubLspBinaryVersion {
168 name: release.tag_name,
169 url: asset.browser_download_url.clone(),
170 digest: asset.digest.clone(),
171 }))
172 }
173
174 async fn fetch_server_binary(
175 &self,
176 version: Box<dyn 'static + Send + Any>,
177 container_dir: PathBuf,
178 delegate: &dyn LspAdapterDelegate,
179 ) -> Result<LanguageServerBinary> {
180 let GitHubLspBinaryVersion { name, url, digest } =
181 &*version.downcast::<GitHubLspBinaryVersion>().unwrap();
182 let expected_digest = digest
183 .as_ref()
184 .and_then(|digest| digest.strip_prefix("sha256:"));
185 let destination_path = container_dir.join(format!("rust-analyzer-{name}"));
186 let server_path = match Self::GITHUB_ASSET_KIND {
187 AssetKind::TarGz | AssetKind::Gz => destination_path.clone(), // Tar and gzip extract in place.
188 AssetKind::Zip => destination_path.clone().join("rust-analyzer.exe"), // zip contains a .exe
189 };
190
191 let binary = LanguageServerBinary {
192 path: server_path.clone(),
193 env: None,
194 arguments: Default::default(),
195 };
196
197 let metadata_path = destination_path.with_extension("metadata");
198 let metadata = GithubBinaryMetadata::read_from_file(&metadata_path)
199 .await
200 .ok();
201 if let Some(metadata) = metadata {
202 let validity_check = async || {
203 delegate
204 .try_exec(LanguageServerBinary {
205 path: server_path.clone(),
206 arguments: vec!["--version".into()],
207 env: None,
208 })
209 .await
210 .inspect_err(|err| {
211 log::warn!("Unable to run {server_path:?} asset, redownloading: {err}",)
212 })
213 };
214 if let (Some(actual_digest), Some(expected_digest)) =
215 (&metadata.digest, expected_digest)
216 {
217 if actual_digest == expected_digest {
218 if validity_check().await.is_ok() {
219 return Ok(binary);
220 }
221 } else {
222 log::info!(
223 "SHA-256 mismatch for {destination_path:?} asset, downloading new asset. Expected: {expected_digest}, Got: {actual_digest}"
224 );
225 }
226 } else if validity_check().await.is_ok() {
227 return Ok(binary);
228 }
229 }
230
231 _ = fs::remove_dir_all(&destination_path).await;
232 download_server_binary(
233 delegate,
234 url,
235 expected_digest,
236 &destination_path,
237 Self::GITHUB_ASSET_KIND,
238 )
239 .await?;
240 make_file_executable(&server_path).await?;
241 GithubBinaryMetadata::write_to_file(
242 &GithubBinaryMetadata {
243 metadata_version: 1,
244 digest: expected_digest.map(ToString::to_string),
245 },
246 &metadata_path,
247 )
248 .await?;
249
250 Ok(LanguageServerBinary {
251 path: server_path,
252 env: None,
253 arguments: Default::default(),
254 })
255 }
256
257 async fn cached_server_binary(
258 &self,
259 container_dir: PathBuf,
260 _: &dyn LspAdapterDelegate,
261 ) -> Option<LanguageServerBinary> {
262 get_cached_server_binary(container_dir).await
263 }
264
265 fn disk_based_diagnostic_sources(&self) -> Vec<String> {
266 vec![CARGO_DIAGNOSTICS_SOURCE_NAME.to_owned()]
267 }
268
269 fn disk_based_diagnostics_progress_token(&self) -> Option<String> {
270 Some("rust-analyzer/flycheck".into())
271 }
272
273 fn process_diagnostics(
274 &self,
275 params: &mut lsp::PublishDiagnosticsParams,
276 _: LanguageServerId,
277 _: Option<&'_ Buffer>,
278 ) {
279 static REGEX: LazyLock<Regex> =
280 LazyLock::new(|| Regex::new(r"(?m)`([^`]+)\n`$").expect("Failed to create REGEX"));
281
282 for diagnostic in &mut params.diagnostics {
283 for message in diagnostic
284 .related_information
285 .iter_mut()
286 .flatten()
287 .map(|info| &mut info.message)
288 .chain([&mut diagnostic.message])
289 {
290 if let Cow::Owned(sanitized) = REGEX.replace_all(message, "`$1`") {
291 *message = sanitized;
292 }
293 }
294 }
295 }
296
297 fn diagnostic_message_to_markdown(&self, message: &str) -> Option<String> {
298 static REGEX: LazyLock<Regex> =
299 LazyLock::new(|| Regex::new(r"(?m)\n *").expect("Failed to create REGEX"));
300 Some(REGEX.replace_all(message, "\n\n").to_string())
301 }
302
303 async fn label_for_completion(
304 &self,
305 completion: &lsp::CompletionItem,
306 language: &Arc<Language>,
307 ) -> Option<CodeLabel> {
308 // rust-analyzer calls these detail left and detail right in terms of where it expects things to be rendered
309 // this usually contains signatures of the thing to be completed
310 let detail_right = completion
311 .label_details
312 .as_ref()
313 .and_then(|detail| detail.description.as_ref())
314 .or(completion.detail.as_ref())
315 .map(|detail| detail.trim());
316 // this tends to contain alias and import information
317 let detail_left = completion
318 .label_details
319 .as_ref()
320 .and_then(|detail| detail.detail.as_deref());
321 let mk_label = |text: String, runs| {
322 let filter_range = completion
323 .filter_text
324 .as_deref()
325 .and_then(|filter| {
326 completion
327 .label
328 .find(filter)
329 .map(|ix| ix..ix + filter.len())
330 })
331 .unwrap_or(0..completion.label.len());
332
333 CodeLabel {
334 text,
335 runs,
336 filter_range,
337 }
338 };
339 let mut label = match (detail_right, completion.kind) {
340 (Some(signature), Some(lsp::CompletionItemKind::FIELD)) => {
341 let name = &completion.label;
342 let text = format!("{name}: {signature}");
343 let prefix = "struct S { ";
344 let source = Rope::from(format!("{prefix}{text} }}"));
345 let runs =
346 language.highlight_text(&source, prefix.len()..prefix.len() + text.len());
347 mk_label(text, runs)
348 }
349 (
350 Some(signature),
351 Some(lsp::CompletionItemKind::CONSTANT | lsp::CompletionItemKind::VARIABLE),
352 ) if completion.insert_text_format != Some(lsp::InsertTextFormat::SNIPPET) => {
353 let name = &completion.label;
354 let text = format!("{name}: {signature}",);
355 let prefix = "let ";
356 let source = Rope::from(format!("{prefix}{text} = ();"));
357 let runs =
358 language.highlight_text(&source, prefix.len()..prefix.len() + text.len());
359 mk_label(text, runs)
360 }
361 (
362 function_signature,
363 Some(lsp::CompletionItemKind::FUNCTION | lsp::CompletionItemKind::METHOD),
364 ) => {
365 const FUNCTION_PREFIXES: [&str; 6] = [
366 "async fn",
367 "async unsafe fn",
368 "const fn",
369 "const unsafe fn",
370 "unsafe fn",
371 "fn",
372 ];
373 let fn_prefixed = FUNCTION_PREFIXES.iter().find_map(|&prefix| {
374 function_signature?
375 .strip_prefix(prefix)
376 .map(|suffix| (prefix, suffix))
377 });
378 // fn keyword should be followed by opening parenthesis.
379 if let Some((prefix, suffix)) = fn_prefixed {
380 let label = if let Some(label) = completion
381 .label
382 .strip_suffix("(…)")
383 .or_else(|| completion.label.strip_suffix("()"))
384 {
385 label
386 } else {
387 &completion.label
388 };
389 let text = format!("{label}{suffix}");
390 let source = Rope::from(format!("{prefix} {text} {{}}"));
391 let run_start = prefix.len() + 1;
392 let runs = language.highlight_text(&source, run_start..run_start + text.len());
393 mk_label(text, runs)
394 } else if completion
395 .detail
396 .as_ref()
397 .map_or(false, |detail| detail.starts_with("macro_rules! "))
398 {
399 let text = completion.label.clone();
400 let len = text.len();
401 let source = Rope::from(text.as_str());
402 let runs = language.highlight_text(&source, 0..len);
403 mk_label(text, runs)
404 } else {
405 mk_label(completion.label.clone(), vec![])
406 }
407 }
408 (_, kind) => {
409 let highlight_name = kind.and_then(|kind| match kind {
410 lsp::CompletionItemKind::STRUCT
411 | lsp::CompletionItemKind::INTERFACE
412 | lsp::CompletionItemKind::ENUM => Some("type"),
413 lsp::CompletionItemKind::ENUM_MEMBER => Some("variant"),
414 lsp::CompletionItemKind::KEYWORD => Some("keyword"),
415 lsp::CompletionItemKind::VALUE | lsp::CompletionItemKind::CONSTANT => {
416 Some("constant")
417 }
418 _ => None,
419 });
420
421 let label = completion.label.clone();
422 let mut runs = vec![];
423 if let Some(highlight_name) = highlight_name {
424 let highlight_id = language.grammar()?.highlight_id_for_name(highlight_name)?;
425 runs.push((
426 0..label.rfind('(').unwrap_or(completion.label.len()),
427 highlight_id,
428 ));
429 }
430 mk_label(label, runs)
431 }
432 };
433
434 if let Some(detail_left) = detail_left {
435 label.text.push(' ');
436 if !detail_left.starts_with('(') {
437 label.text.push('(');
438 }
439 label.text.push_str(detail_left);
440 if !detail_left.ends_with(')') {
441 label.text.push(')');
442 }
443 }
444 Some(label)
445 }
446
447 async fn label_for_symbol(
448 &self,
449 name: &str,
450 kind: lsp::SymbolKind,
451 language: &Arc<Language>,
452 ) -> Option<CodeLabel> {
453 let (text, filter_range, display_range) = match kind {
454 lsp::SymbolKind::METHOD | lsp::SymbolKind::FUNCTION => {
455 let text = format!("fn {} () {{}}", name);
456 let filter_range = 3..3 + name.len();
457 let display_range = 0..filter_range.end;
458 (text, filter_range, display_range)
459 }
460 lsp::SymbolKind::STRUCT => {
461 let text = format!("struct {} {{}}", name);
462 let filter_range = 7..7 + name.len();
463 let display_range = 0..filter_range.end;
464 (text, filter_range, display_range)
465 }
466 lsp::SymbolKind::ENUM => {
467 let text = format!("enum {} {{}}", name);
468 let filter_range = 5..5 + name.len();
469 let display_range = 0..filter_range.end;
470 (text, filter_range, display_range)
471 }
472 lsp::SymbolKind::INTERFACE => {
473 let text = format!("trait {} {{}}", name);
474 let filter_range = 6..6 + name.len();
475 let display_range = 0..filter_range.end;
476 (text, filter_range, display_range)
477 }
478 lsp::SymbolKind::CONSTANT => {
479 let text = format!("const {}: () = ();", name);
480 let filter_range = 6..6 + name.len();
481 let display_range = 0..filter_range.end;
482 (text, filter_range, display_range)
483 }
484 lsp::SymbolKind::MODULE => {
485 let text = format!("mod {} {{}}", name);
486 let filter_range = 4..4 + name.len();
487 let display_range = 0..filter_range.end;
488 (text, filter_range, display_range)
489 }
490 lsp::SymbolKind::TYPE_PARAMETER => {
491 let text = format!("type {} {{}}", name);
492 let filter_range = 5..5 + name.len();
493 let display_range = 0..filter_range.end;
494 (text, filter_range, display_range)
495 }
496 _ => return None,
497 };
498
499 Some(CodeLabel {
500 runs: language.highlight_text(&text.as_str().into(), display_range.clone()),
501 text: text[display_range].to_string(),
502 filter_range,
503 })
504 }
505
506 fn prepare_initialize_params(
507 &self,
508 mut original: InitializeParams,
509 cx: &App,
510 ) -> Result<InitializeParams> {
511 let enable_lsp_tasks = ProjectSettings::get_global(cx)
512 .lsp
513 .get(&SERVER_NAME)
514 .map_or(false, |s| s.enable_lsp_tasks);
515 if enable_lsp_tasks {
516 let experimental = json!({
517 "runnables": {
518 "kinds": [ "cargo", "shell" ],
519 },
520 });
521 if let Some(original_experimental) = &mut original.capabilities.experimental {
522 merge_json_value_into(experimental, original_experimental);
523 } else {
524 original.capabilities.experimental = Some(experimental);
525 }
526 }
527
528 let cargo_diagnostics_fetched_separately = ProjectSettings::get_global(cx)
529 .diagnostics
530 .fetch_cargo_diagnostics();
531 if cargo_diagnostics_fetched_separately {
532 let disable_check_on_save = json!({
533 "checkOnSave": false,
534 });
535 if let Some(initialization_options) = &mut original.initialization_options {
536 merge_json_value_into(disable_check_on_save, initialization_options);
537 } else {
538 original.initialization_options = Some(disable_check_on_save);
539 }
540 }
541
542 Ok(original)
543 }
544}
545
546pub(crate) struct RustContextProvider;
547
548const RUST_PACKAGE_TASK_VARIABLE: VariableName =
549 VariableName::Custom(Cow::Borrowed("RUST_PACKAGE"));
550
551/// The bin name corresponding to the current file in Cargo.toml
552const RUST_BIN_NAME_TASK_VARIABLE: VariableName =
553 VariableName::Custom(Cow::Borrowed("RUST_BIN_NAME"));
554
555/// The bin kind (bin/example) corresponding to the current file in Cargo.toml
556const RUST_BIN_KIND_TASK_VARIABLE: VariableName =
557 VariableName::Custom(Cow::Borrowed("RUST_BIN_KIND"));
558
559/// The flag to list required features for executing a bin, if any
560const RUST_BIN_REQUIRED_FEATURES_FLAG_TASK_VARIABLE: VariableName =
561 VariableName::Custom(Cow::Borrowed("RUST_BIN_REQUIRED_FEATURES_FLAG"));
562
563/// The list of required features for executing a bin, if any
564const RUST_BIN_REQUIRED_FEATURES_TASK_VARIABLE: VariableName =
565 VariableName::Custom(Cow::Borrowed("RUST_BIN_REQUIRED_FEATURES"));
566
567const RUST_TEST_FRAGMENT_TASK_VARIABLE: VariableName =
568 VariableName::Custom(Cow::Borrowed("RUST_TEST_FRAGMENT"));
569
570const RUST_DOC_TEST_NAME_TASK_VARIABLE: VariableName =
571 VariableName::Custom(Cow::Borrowed("RUST_DOC_TEST_NAME"));
572
573const RUST_TEST_NAME_TASK_VARIABLE: VariableName =
574 VariableName::Custom(Cow::Borrowed("RUST_TEST_NAME"));
575
576const RUST_MANIFEST_DIRNAME_TASK_VARIABLE: VariableName =
577 VariableName::Custom(Cow::Borrowed("RUST_MANIFEST_DIRNAME"));
578
579impl ContextProvider for RustContextProvider {
580 fn build_context(
581 &self,
582 task_variables: &TaskVariables,
583 location: ContextLocation<'_>,
584 project_env: Option<HashMap<String, String>>,
585 _: Arc<dyn LanguageToolchainStore>,
586 cx: &mut gpui::App,
587 ) -> Task<Result<TaskVariables>> {
588 let local_abs_path = location
589 .file_location
590 .buffer
591 .read(cx)
592 .file()
593 .and_then(|file| Some(file.as_local()?.abs_path(cx)));
594
595 let mut variables = TaskVariables::default();
596
597 if let (Some(path), Some(stem)) = (&local_abs_path, task_variables.get(&VariableName::Stem))
598 {
599 let fragment = test_fragment(&variables, &path, stem);
600 variables.insert(RUST_TEST_FRAGMENT_TASK_VARIABLE, fragment);
601 };
602 if let Some(test_name) =
603 task_variables.get(&VariableName::Custom(Cow::Borrowed("_test_name")))
604 {
605 variables.insert(RUST_TEST_NAME_TASK_VARIABLE, test_name.into());
606 }
607 if let Some(doc_test_name) =
608 task_variables.get(&VariableName::Custom(Cow::Borrowed("_doc_test_name")))
609 {
610 variables.insert(RUST_DOC_TEST_NAME_TASK_VARIABLE, doc_test_name.into());
611 }
612 cx.background_spawn(async move {
613 if let Some(path) = local_abs_path
614 .as_deref()
615 .and_then(|local_abs_path| local_abs_path.parent())
616 {
617 if let Some(package_name) =
618 human_readable_package_name(path, project_env.as_ref()).await
619 {
620 variables.insert(RUST_PACKAGE_TASK_VARIABLE.clone(), package_name);
621 }
622 }
623 if let Some(path) = local_abs_path.as_ref()
624 && let Some((target, manifest_path)) =
625 target_info_from_abs_path(&path, project_env.as_ref()).await
626 {
627 if let Some(target) = target {
628 variables.extend(TaskVariables::from_iter([
629 (RUST_PACKAGE_TASK_VARIABLE.clone(), target.package_name),
630 (RUST_BIN_NAME_TASK_VARIABLE.clone(), target.target_name),
631 (
632 RUST_BIN_KIND_TASK_VARIABLE.clone(),
633 target.target_kind.to_string(),
634 ),
635 ]));
636 if target.required_features.is_empty() {
637 variables.insert(RUST_BIN_REQUIRED_FEATURES_FLAG_TASK_VARIABLE, "".into());
638 variables.insert(RUST_BIN_REQUIRED_FEATURES_TASK_VARIABLE, "".into());
639 } else {
640 variables.insert(
641 RUST_BIN_REQUIRED_FEATURES_FLAG_TASK_VARIABLE.clone(),
642 "--features".to_string(),
643 );
644 variables.insert(
645 RUST_BIN_REQUIRED_FEATURES_TASK_VARIABLE.clone(),
646 target.required_features.join(","),
647 );
648 }
649 }
650 variables.extend(TaskVariables::from_iter([(
651 RUST_MANIFEST_DIRNAME_TASK_VARIABLE.clone(),
652 manifest_path.to_string_lossy().into_owned(),
653 )]));
654 }
655 Ok(variables)
656 })
657 }
658
659 fn associated_tasks(
660 &self,
661 _: Arc<dyn Fs>,
662 file: Option<Arc<dyn language::File>>,
663 cx: &App,
664 ) -> Task<Option<TaskTemplates>> {
665 const DEFAULT_RUN_NAME_STR: &str = "RUST_DEFAULT_PACKAGE_RUN";
666 const CUSTOM_TARGET_DIR: &str = "RUST_TARGET_DIR";
667
668 let language_sets = language_settings(Some("Rust".into()), file.as_ref(), cx);
669 let package_to_run = language_sets
670 .tasks
671 .variables
672 .get(DEFAULT_RUN_NAME_STR)
673 .cloned();
674 let custom_target_dir = language_sets
675 .tasks
676 .variables
677 .get(CUSTOM_TARGET_DIR)
678 .cloned();
679 let run_task_args = if let Some(package_to_run) = package_to_run.clone() {
680 vec!["run".into(), "-p".into(), package_to_run]
681 } else {
682 vec!["run".into()]
683 };
684 let mut task_templates = vec![
685 TaskTemplate {
686 label: format!(
687 "Check (package: {})",
688 RUST_PACKAGE_TASK_VARIABLE.template_value(),
689 ),
690 command: "cargo".into(),
691 args: vec![
692 "check".into(),
693 "-p".into(),
694 RUST_PACKAGE_TASK_VARIABLE.template_value(),
695 ],
696 cwd: Some("$ZED_DIRNAME".to_owned()),
697 ..TaskTemplate::default()
698 },
699 TaskTemplate {
700 label: "Check all targets (workspace)".into(),
701 command: "cargo".into(),
702 args: vec!["check".into(), "--workspace".into(), "--all-targets".into()],
703 cwd: Some("$ZED_DIRNAME".to_owned()),
704 ..TaskTemplate::default()
705 },
706 TaskTemplate {
707 label: format!(
708 "Test '{}' (package: {})",
709 RUST_TEST_NAME_TASK_VARIABLE.template_value(),
710 RUST_PACKAGE_TASK_VARIABLE.template_value(),
711 ),
712 command: "cargo".into(),
713 args: vec![
714 "test".into(),
715 "-p".into(),
716 RUST_PACKAGE_TASK_VARIABLE.template_value(),
717 "--".into(),
718 "--nocapture".into(),
719 "--include-ignored".into(),
720 RUST_TEST_NAME_TASK_VARIABLE.template_value(),
721 ],
722 tags: vec!["rust-test".to_owned()],
723 cwd: Some(RUST_MANIFEST_DIRNAME_TASK_VARIABLE.template_value()),
724 ..TaskTemplate::default()
725 },
726 TaskTemplate {
727 label: format!(
728 "Doc test '{}' (package: {})",
729 RUST_DOC_TEST_NAME_TASK_VARIABLE.template_value(),
730 RUST_PACKAGE_TASK_VARIABLE.template_value(),
731 ),
732 command: "cargo".into(),
733 args: vec![
734 "test".into(),
735 "--doc".into(),
736 "-p".into(),
737 RUST_PACKAGE_TASK_VARIABLE.template_value(),
738 "--".into(),
739 "--nocapture".into(),
740 "--include-ignored".into(),
741 RUST_DOC_TEST_NAME_TASK_VARIABLE.template_value(),
742 ],
743 tags: vec!["rust-doc-test".to_owned()],
744 cwd: Some(RUST_MANIFEST_DIRNAME_TASK_VARIABLE.template_value()),
745 ..TaskTemplate::default()
746 },
747 TaskTemplate {
748 label: format!(
749 "Test mod '{}' (package: {})",
750 VariableName::Stem.template_value(),
751 RUST_PACKAGE_TASK_VARIABLE.template_value(),
752 ),
753 command: "cargo".into(),
754 args: vec![
755 "test".into(),
756 "-p".into(),
757 RUST_PACKAGE_TASK_VARIABLE.template_value(),
758 "--".into(),
759 RUST_TEST_FRAGMENT_TASK_VARIABLE.template_value(),
760 ],
761 tags: vec!["rust-mod-test".to_owned()],
762 cwd: Some(RUST_MANIFEST_DIRNAME_TASK_VARIABLE.template_value()),
763 ..TaskTemplate::default()
764 },
765 TaskTemplate {
766 label: format!(
767 "Run {} {} (package: {})",
768 RUST_BIN_KIND_TASK_VARIABLE.template_value(),
769 RUST_BIN_NAME_TASK_VARIABLE.template_value(),
770 RUST_PACKAGE_TASK_VARIABLE.template_value(),
771 ),
772 command: "cargo".into(),
773 args: vec![
774 "run".into(),
775 "-p".into(),
776 RUST_PACKAGE_TASK_VARIABLE.template_value(),
777 format!("--{}", RUST_BIN_KIND_TASK_VARIABLE.template_value()),
778 RUST_BIN_NAME_TASK_VARIABLE.template_value(),
779 RUST_BIN_REQUIRED_FEATURES_FLAG_TASK_VARIABLE.template_value(),
780 RUST_BIN_REQUIRED_FEATURES_TASK_VARIABLE.template_value(),
781 ],
782 cwd: Some("$ZED_DIRNAME".to_owned()),
783 tags: vec!["rust-main".to_owned()],
784 ..TaskTemplate::default()
785 },
786 TaskTemplate {
787 label: format!(
788 "Test (package: {})",
789 RUST_PACKAGE_TASK_VARIABLE.template_value()
790 ),
791 command: "cargo".into(),
792 args: vec![
793 "test".into(),
794 "-p".into(),
795 RUST_PACKAGE_TASK_VARIABLE.template_value(),
796 ],
797 cwd: Some(RUST_MANIFEST_DIRNAME_TASK_VARIABLE.template_value()),
798 ..TaskTemplate::default()
799 },
800 TaskTemplate {
801 label: "Run".into(),
802 command: "cargo".into(),
803 args: run_task_args,
804 cwd: Some("$ZED_DIRNAME".to_owned()),
805 ..TaskTemplate::default()
806 },
807 TaskTemplate {
808 label: "Clean".into(),
809 command: "cargo".into(),
810 args: vec!["clean".into()],
811 cwd: Some("$ZED_DIRNAME".to_owned()),
812 ..TaskTemplate::default()
813 },
814 ];
815
816 if let Some(custom_target_dir) = custom_target_dir {
817 task_templates = task_templates
818 .into_iter()
819 .map(|mut task_template| {
820 let mut args = task_template.args.split_off(1);
821 task_template.args.append(&mut vec![
822 "--target-dir".to_string(),
823 custom_target_dir.clone(),
824 ]);
825 task_template.args.append(&mut args);
826
827 task_template
828 })
829 .collect();
830 }
831
832 Task::ready(Some(TaskTemplates(task_templates)))
833 }
834
835 fn lsp_task_source(&self) -> Option<LanguageServerName> {
836 Some(SERVER_NAME)
837 }
838}
839
840/// Part of the data structure of Cargo metadata
841#[derive(Debug, serde::Deserialize)]
842struct CargoMetadata {
843 packages: Vec<CargoPackage>,
844}
845
846#[derive(Debug, serde::Deserialize)]
847struct CargoPackage {
848 id: String,
849 targets: Vec<CargoTarget>,
850 manifest_path: Arc<Path>,
851}
852
853#[derive(Debug, serde::Deserialize)]
854struct CargoTarget {
855 name: String,
856 kind: Vec<String>,
857 src_path: String,
858 #[serde(rename = "required-features", default)]
859 required_features: Vec<String>,
860}
861
862#[derive(Debug, PartialEq)]
863enum TargetKind {
864 Bin,
865 Example,
866}
867
868impl Display for TargetKind {
869 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
870 match self {
871 TargetKind::Bin => write!(f, "bin"),
872 TargetKind::Example => write!(f, "example"),
873 }
874 }
875}
876
877impl TryFrom<&str> for TargetKind {
878 type Error = ();
879 fn try_from(value: &str) -> Result<Self, ()> {
880 match value {
881 "bin" => Ok(Self::Bin),
882 "example" => Ok(Self::Example),
883 _ => Err(()),
884 }
885 }
886}
887/// Which package and binary target are we in?
888#[derive(Debug, PartialEq)]
889struct TargetInfo {
890 package_name: String,
891 target_name: String,
892 target_kind: TargetKind,
893 required_features: Vec<String>,
894}
895
896async fn target_info_from_abs_path(
897 abs_path: &Path,
898 project_env: Option<&HashMap<String, String>>,
899) -> Option<(Option<TargetInfo>, Arc<Path>)> {
900 let mut command = util::command::new_smol_command("cargo");
901 if let Some(envs) = project_env {
902 command.envs(envs);
903 }
904 let output = command
905 .current_dir(abs_path.parent()?)
906 .arg("metadata")
907 .arg("--no-deps")
908 .arg("--format-version")
909 .arg("1")
910 .output()
911 .await
912 .log_err()?
913 .stdout;
914
915 let metadata: CargoMetadata = serde_json::from_slice(&output).log_err()?;
916 target_info_from_metadata(metadata, abs_path)
917}
918
919fn target_info_from_metadata(
920 metadata: CargoMetadata,
921 abs_path: &Path,
922) -> Option<(Option<TargetInfo>, Arc<Path>)> {
923 let mut manifest_path = None;
924 for package in metadata.packages {
925 let Some(manifest_dir_path) = package.manifest_path.parent() else {
926 continue;
927 };
928
929 let Some(path_from_manifest_dir) = abs_path.strip_prefix(manifest_dir_path).ok() else {
930 continue;
931 };
932 let candidate_path_length = path_from_manifest_dir.components().count();
933 // Pick the most specific manifest path
934 if let Some((path, current_length)) = &mut manifest_path {
935 if candidate_path_length > *current_length {
936 *path = Arc::from(manifest_dir_path);
937 *current_length = candidate_path_length;
938 }
939 } else {
940 manifest_path = Some((Arc::from(manifest_dir_path), candidate_path_length));
941 };
942
943 for target in package.targets {
944 let Some(bin_kind) = target
945 .kind
946 .iter()
947 .find_map(|kind| TargetKind::try_from(kind.as_ref()).ok())
948 else {
949 continue;
950 };
951 let target_path = PathBuf::from(target.src_path);
952 if target_path == abs_path {
953 return manifest_path.map(|(path, _)| {
954 (
955 package_name_from_pkgid(&package.id).map(|package_name| TargetInfo {
956 package_name: package_name.to_owned(),
957 target_name: target.name,
958 required_features: target.required_features,
959 target_kind: bin_kind,
960 }),
961 path,
962 )
963 });
964 }
965 }
966 }
967
968 manifest_path.map(|(path, _)| (None, path))
969}
970
971async fn human_readable_package_name(
972 package_directory: &Path,
973 project_env: Option<&HashMap<String, String>>,
974) -> Option<String> {
975 let mut command = util::command::new_smol_command("cargo");
976 if let Some(envs) = project_env {
977 command.envs(envs);
978 }
979 let pkgid = String::from_utf8(
980 command
981 .current_dir(package_directory)
982 .arg("pkgid")
983 .output()
984 .await
985 .log_err()?
986 .stdout,
987 )
988 .ok()?;
989 Some(package_name_from_pkgid(&pkgid)?.to_owned())
990}
991
992// For providing local `cargo check -p $pkgid` task, we do not need most of the information we have returned.
993// Output example in the root of Zed project:
994// ```sh
995// ❯ cargo pkgid zed
996// path+file:///absolute/path/to/project/zed/crates/zed#0.131.0
997// ```
998// Another variant, if a project has a custom package name or hyphen in the name:
999// ```
1000// path+file:///absolute/path/to/project/custom-package#my-custom-package@0.1.0
1001// ```
1002//
1003// Extracts the package name from the output according to the spec:
1004// https://doc.rust-lang.org/cargo/reference/pkgid-spec.html#specification-grammar
1005fn package_name_from_pkgid(pkgid: &str) -> Option<&str> {
1006 fn split_off_suffix(input: &str, suffix_start: char) -> &str {
1007 match input.rsplit_once(suffix_start) {
1008 Some((without_suffix, _)) => without_suffix,
1009 None => input,
1010 }
1011 }
1012
1013 let (version_prefix, version_suffix) = pkgid.trim().rsplit_once('#')?;
1014 let package_name = match version_suffix.rsplit_once('@') {
1015 Some((custom_package_name, _version)) => custom_package_name,
1016 None => {
1017 let host_and_path = split_off_suffix(version_prefix, '?');
1018 let (_, package_name) = host_and_path.rsplit_once('/')?;
1019 package_name
1020 }
1021 };
1022 Some(package_name)
1023}
1024
1025async fn get_cached_server_binary(container_dir: PathBuf) -> Option<LanguageServerBinary> {
1026 maybe!(async {
1027 let mut last = None;
1028 let mut entries = fs::read_dir(&container_dir).await?;
1029 while let Some(entry) = entries.next().await {
1030 let path = entry?.path();
1031 if path.extension().is_some_and(|ext| ext == "metadata") {
1032 continue;
1033 }
1034 last = Some(path);
1035 }
1036
1037 anyhow::Ok(LanguageServerBinary {
1038 path: last.context("no cached binary")?,
1039 env: None,
1040 arguments: Default::default(),
1041 })
1042 })
1043 .await
1044 .log_err()
1045}
1046
1047fn test_fragment(variables: &TaskVariables, path: &Path, stem: &str) -> String {
1048 let fragment = if stem == "lib" {
1049 // This isn't quite right---it runs the tests for the entire library, rather than
1050 // just for the top-level `mod tests`. But we don't really have the means here to
1051 // filter out just that module.
1052 Some("--lib".to_owned())
1053 } else if stem == "mod" {
1054 maybe!({ Some(path.parent()?.file_name()?.to_string_lossy().to_string()) })
1055 } else if stem == "main" {
1056 if let (Some(bin_name), Some(bin_kind)) = (
1057 variables.get(&RUST_BIN_NAME_TASK_VARIABLE),
1058 variables.get(&RUST_BIN_KIND_TASK_VARIABLE),
1059 ) {
1060 Some(format!("--{bin_kind}={bin_name}"))
1061 } else {
1062 None
1063 }
1064 } else {
1065 Some(stem.to_owned())
1066 };
1067 fragment.unwrap_or_else(|| "--".to_owned())
1068}
1069
1070#[cfg(test)]
1071mod tests {
1072 use std::num::NonZeroU32;
1073
1074 use super::*;
1075 use crate::language;
1076 use gpui::{BorrowAppContext, Hsla, TestAppContext};
1077 use language::language_settings::AllLanguageSettings;
1078 use lsp::CompletionItemLabelDetails;
1079 use settings::SettingsStore;
1080 use theme::SyntaxTheme;
1081 use util::path;
1082
1083 #[gpui::test]
1084 async fn test_process_rust_diagnostics() {
1085 let mut params = lsp::PublishDiagnosticsParams {
1086 uri: lsp::Url::from_file_path(path!("/a")).unwrap(),
1087 version: None,
1088 diagnostics: vec![
1089 // no newlines
1090 lsp::Diagnostic {
1091 message: "use of moved value `a`".to_string(),
1092 ..Default::default()
1093 },
1094 // newline at the end of a code span
1095 lsp::Diagnostic {
1096 message: "consider importing this struct: `use b::c;\n`".to_string(),
1097 ..Default::default()
1098 },
1099 // code span starting right after a newline
1100 lsp::Diagnostic {
1101 message: "cannot borrow `self.d` as mutable\n`self` is a `&` reference"
1102 .to_string(),
1103 ..Default::default()
1104 },
1105 ],
1106 };
1107 RustLspAdapter.process_diagnostics(&mut params, LanguageServerId(0), None);
1108
1109 assert_eq!(params.diagnostics[0].message, "use of moved value `a`");
1110
1111 // remove trailing newline from code span
1112 assert_eq!(
1113 params.diagnostics[1].message,
1114 "consider importing this struct: `use b::c;`"
1115 );
1116
1117 // do not remove newline before the start of code span
1118 assert_eq!(
1119 params.diagnostics[2].message,
1120 "cannot borrow `self.d` as mutable\n`self` is a `&` reference"
1121 );
1122 }
1123
1124 #[gpui::test]
1125 async fn test_rust_label_for_completion() {
1126 let adapter = Arc::new(RustLspAdapter);
1127 let language = language("rust", tree_sitter_rust::LANGUAGE.into());
1128 let grammar = language.grammar().unwrap();
1129 let theme = SyntaxTheme::new_test([
1130 ("type", Hsla::default()),
1131 ("keyword", Hsla::default()),
1132 ("function", Hsla::default()),
1133 ("property", Hsla::default()),
1134 ]);
1135
1136 language.set_theme(&theme);
1137
1138 let highlight_function = grammar.highlight_id_for_name("function").unwrap();
1139 let highlight_type = grammar.highlight_id_for_name("type").unwrap();
1140 let highlight_keyword = grammar.highlight_id_for_name("keyword").unwrap();
1141 let highlight_field = grammar.highlight_id_for_name("property").unwrap();
1142
1143 assert_eq!(
1144 adapter
1145 .label_for_completion(
1146 &lsp::CompletionItem {
1147 kind: Some(lsp::CompletionItemKind::FUNCTION),
1148 label: "hello(…)".to_string(),
1149 label_details: Some(CompletionItemLabelDetails {
1150 detail: Some("(use crate::foo)".into()),
1151 description: Some("fn(&mut Option<T>) -> Vec<T>".to_string())
1152 }),
1153 ..Default::default()
1154 },
1155 &language
1156 )
1157 .await,
1158 Some(CodeLabel {
1159 text: "hello(&mut Option<T>) -> Vec<T> (use crate::foo)".to_string(),
1160 filter_range: 0..10,
1161 runs: vec![
1162 (0..5, highlight_function),
1163 (7..10, highlight_keyword),
1164 (11..17, highlight_type),
1165 (18..19, highlight_type),
1166 (25..28, highlight_type),
1167 (29..30, highlight_type),
1168 ],
1169 })
1170 );
1171 assert_eq!(
1172 adapter
1173 .label_for_completion(
1174 &lsp::CompletionItem {
1175 kind: Some(lsp::CompletionItemKind::FUNCTION),
1176 label: "hello(…)".to_string(),
1177 label_details: Some(CompletionItemLabelDetails {
1178 detail: Some("(use crate::foo)".into()),
1179 description: Some("async fn(&mut Option<T>) -> Vec<T>".to_string()),
1180 }),
1181 ..Default::default()
1182 },
1183 &language
1184 )
1185 .await,
1186 Some(CodeLabel {
1187 text: "hello(&mut Option<T>) -> Vec<T> (use crate::foo)".to_string(),
1188 filter_range: 0..10,
1189 runs: vec![
1190 (0..5, highlight_function),
1191 (7..10, highlight_keyword),
1192 (11..17, highlight_type),
1193 (18..19, highlight_type),
1194 (25..28, highlight_type),
1195 (29..30, highlight_type),
1196 ],
1197 })
1198 );
1199 assert_eq!(
1200 adapter
1201 .label_for_completion(
1202 &lsp::CompletionItem {
1203 kind: Some(lsp::CompletionItemKind::FIELD),
1204 label: "len".to_string(),
1205 detail: Some("usize".to_string()),
1206 ..Default::default()
1207 },
1208 &language
1209 )
1210 .await,
1211 Some(CodeLabel {
1212 text: "len: usize".to_string(),
1213 filter_range: 0..3,
1214 runs: vec![(0..3, highlight_field), (5..10, highlight_type),],
1215 })
1216 );
1217
1218 assert_eq!(
1219 adapter
1220 .label_for_completion(
1221 &lsp::CompletionItem {
1222 kind: Some(lsp::CompletionItemKind::FUNCTION),
1223 label: "hello(…)".to_string(),
1224 label_details: Some(CompletionItemLabelDetails {
1225 detail: Some("(use crate::foo)".to_string()),
1226 description: Some("fn(&mut Option<T>) -> Vec<T>".to_string()),
1227 }),
1228
1229 ..Default::default()
1230 },
1231 &language
1232 )
1233 .await,
1234 Some(CodeLabel {
1235 text: "hello(&mut Option<T>) -> Vec<T> (use crate::foo)".to_string(),
1236 filter_range: 0..10,
1237 runs: vec![
1238 (0..5, highlight_function),
1239 (7..10, highlight_keyword),
1240 (11..17, highlight_type),
1241 (18..19, highlight_type),
1242 (25..28, highlight_type),
1243 (29..30, highlight_type),
1244 ],
1245 })
1246 );
1247
1248 assert_eq!(
1249 adapter
1250 .label_for_completion(
1251 &lsp::CompletionItem {
1252 kind: Some(lsp::CompletionItemKind::FUNCTION),
1253 label: "hello".to_string(),
1254 label_details: Some(CompletionItemLabelDetails {
1255 detail: Some("(use crate::foo)".to_string()),
1256 description: Some("fn(&mut Option<T>) -> Vec<T>".to_string()),
1257 }),
1258 ..Default::default()
1259 },
1260 &language
1261 )
1262 .await,
1263 Some(CodeLabel {
1264 text: "hello(&mut Option<T>) -> Vec<T> (use crate::foo)".to_string(),
1265 filter_range: 0..5,
1266 runs: vec![
1267 (0..5, highlight_function),
1268 (7..10, highlight_keyword),
1269 (11..17, highlight_type),
1270 (18..19, highlight_type),
1271 (25..28, highlight_type),
1272 (29..30, highlight_type),
1273 ],
1274 })
1275 );
1276
1277 assert_eq!(
1278 adapter
1279 .label_for_completion(
1280 &lsp::CompletionItem {
1281 kind: Some(lsp::CompletionItemKind::METHOD),
1282 label: "await.as_deref_mut()".to_string(),
1283 filter_text: Some("as_deref_mut".to_string()),
1284 label_details: Some(CompletionItemLabelDetails {
1285 detail: None,
1286 description: Some("fn(&mut self) -> IterMut<'_, T>".to_string()),
1287 }),
1288 ..Default::default()
1289 },
1290 &language
1291 )
1292 .await,
1293 Some(CodeLabel {
1294 text: "await.as_deref_mut(&mut self) -> IterMut<'_, T>".to_string(),
1295 filter_range: 6..18,
1296 runs: vec![
1297 (6..18, HighlightId(2)),
1298 (20..23, HighlightId(1)),
1299 (33..40, HighlightId(0)),
1300 (45..46, HighlightId(0))
1301 ],
1302 })
1303 );
1304
1305 assert_eq!(
1306 adapter
1307 .label_for_completion(
1308 &lsp::CompletionItem {
1309 kind: Some(lsp::CompletionItemKind::FIELD),
1310 label: "inner_value".to_string(),
1311 filter_text: Some("value".to_string()),
1312 detail: Some("String".to_string()),
1313 ..Default::default()
1314 },
1315 &language,
1316 )
1317 .await,
1318 Some(CodeLabel {
1319 text: "inner_value: String".to_string(),
1320 filter_range: 6..11,
1321 runs: vec![(0..11, HighlightId(3)), (13..19, HighlightId(0))],
1322 })
1323 );
1324 }
1325
1326 #[gpui::test]
1327 async fn test_rust_label_for_symbol() {
1328 let adapter = Arc::new(RustLspAdapter);
1329 let language = language("rust", tree_sitter_rust::LANGUAGE.into());
1330 let grammar = language.grammar().unwrap();
1331 let theme = SyntaxTheme::new_test([
1332 ("type", Hsla::default()),
1333 ("keyword", Hsla::default()),
1334 ("function", Hsla::default()),
1335 ("property", Hsla::default()),
1336 ]);
1337
1338 language.set_theme(&theme);
1339
1340 let highlight_function = grammar.highlight_id_for_name("function").unwrap();
1341 let highlight_type = grammar.highlight_id_for_name("type").unwrap();
1342 let highlight_keyword = grammar.highlight_id_for_name("keyword").unwrap();
1343
1344 assert_eq!(
1345 adapter
1346 .label_for_symbol("hello", lsp::SymbolKind::FUNCTION, &language)
1347 .await,
1348 Some(CodeLabel {
1349 text: "fn hello".to_string(),
1350 filter_range: 3..8,
1351 runs: vec![(0..2, highlight_keyword), (3..8, highlight_function)],
1352 })
1353 );
1354
1355 assert_eq!(
1356 adapter
1357 .label_for_symbol("World", lsp::SymbolKind::TYPE_PARAMETER, &language)
1358 .await,
1359 Some(CodeLabel {
1360 text: "type World".to_string(),
1361 filter_range: 5..10,
1362 runs: vec![(0..4, highlight_keyword), (5..10, highlight_type)],
1363 })
1364 );
1365 }
1366
1367 #[gpui::test]
1368 async fn test_rust_autoindent(cx: &mut TestAppContext) {
1369 // cx.executor().set_block_on_ticks(usize::MAX..=usize::MAX);
1370 cx.update(|cx| {
1371 let test_settings = SettingsStore::test(cx);
1372 cx.set_global(test_settings);
1373 language::init(cx);
1374 cx.update_global::<SettingsStore, _>(|store, cx| {
1375 store.update_user_settings::<AllLanguageSettings>(cx, |s| {
1376 s.defaults.tab_size = NonZeroU32::new(2);
1377 });
1378 });
1379 });
1380
1381 let language = crate::language("rust", tree_sitter_rust::LANGUAGE.into());
1382
1383 cx.new(|cx| {
1384 let mut buffer = Buffer::local("", cx).with_language(language, cx);
1385
1386 // indent between braces
1387 buffer.set_text("fn a() {}", cx);
1388 let ix = buffer.len() - 1;
1389 buffer.edit([(ix..ix, "\n\n")], Some(AutoindentMode::EachLine), cx);
1390 assert_eq!(buffer.text(), "fn a() {\n \n}");
1391
1392 // indent between braces, even after empty lines
1393 buffer.set_text("fn a() {\n\n\n}", cx);
1394 let ix = buffer.len() - 2;
1395 buffer.edit([(ix..ix, "\n")], Some(AutoindentMode::EachLine), cx);
1396 assert_eq!(buffer.text(), "fn a() {\n\n\n \n}");
1397
1398 // indent a line that continues a field expression
1399 buffer.set_text("fn a() {\n \n}", cx);
1400 let ix = buffer.len() - 2;
1401 buffer.edit([(ix..ix, "b\n.c")], Some(AutoindentMode::EachLine), cx);
1402 assert_eq!(buffer.text(), "fn a() {\n b\n .c\n}");
1403
1404 // indent further lines that continue the field expression, even after empty lines
1405 let ix = buffer.len() - 2;
1406 buffer.edit([(ix..ix, "\n\n.d")], Some(AutoindentMode::EachLine), cx);
1407 assert_eq!(buffer.text(), "fn a() {\n b\n .c\n \n .d\n}");
1408
1409 // dedent the line after the field expression
1410 let ix = buffer.len() - 2;
1411 buffer.edit([(ix..ix, ";\ne")], Some(AutoindentMode::EachLine), cx);
1412 assert_eq!(
1413 buffer.text(),
1414 "fn a() {\n b\n .c\n \n .d;\n e\n}"
1415 );
1416
1417 // indent inside a struct within a call
1418 buffer.set_text("const a: B = c(D {});", cx);
1419 let ix = buffer.len() - 3;
1420 buffer.edit([(ix..ix, "\n\n")], Some(AutoindentMode::EachLine), cx);
1421 assert_eq!(buffer.text(), "const a: B = c(D {\n \n});");
1422
1423 // indent further inside a nested call
1424 let ix = buffer.len() - 4;
1425 buffer.edit([(ix..ix, "e: f(\n\n)")], Some(AutoindentMode::EachLine), cx);
1426 assert_eq!(buffer.text(), "const a: B = c(D {\n e: f(\n \n )\n});");
1427
1428 // keep that indent after an empty line
1429 let ix = buffer.len() - 8;
1430 buffer.edit([(ix..ix, "\n")], Some(AutoindentMode::EachLine), cx);
1431 assert_eq!(
1432 buffer.text(),
1433 "const a: B = c(D {\n e: f(\n \n \n )\n});"
1434 );
1435
1436 buffer
1437 });
1438 }
1439
1440 #[test]
1441 fn test_package_name_from_pkgid() {
1442 for (input, expected) in [
1443 (
1444 "path+file:///absolute/path/to/project/zed/crates/zed#0.131.0",
1445 "zed",
1446 ),
1447 (
1448 "path+file:///absolute/path/to/project/custom-package#my-custom-package@0.1.0",
1449 "my-custom-package",
1450 ),
1451 ] {
1452 assert_eq!(package_name_from_pkgid(input), Some(expected));
1453 }
1454 }
1455
1456 #[test]
1457 fn test_target_info_from_metadata() {
1458 for (input, absolute_path, expected) in [
1459 (
1460 r#"{"packages":[{"id":"path+file:///absolute/path/to/project/zed/crates/zed#0.131.0","manifest_path":"/path/to/zed/Cargo.toml","targets":[{"name":"zed","kind":["bin"],"src_path":"/path/to/zed/src/main.rs"}]}]}"#,
1461 "/path/to/zed/src/main.rs",
1462 Some((
1463 Some(TargetInfo {
1464 package_name: "zed".into(),
1465 target_name: "zed".into(),
1466 required_features: Vec::new(),
1467 target_kind: TargetKind::Bin,
1468 }),
1469 Arc::from("/path/to/zed".as_ref()),
1470 )),
1471 ),
1472 (
1473 r#"{"packages":[{"id":"path+file:///path/to/custom-package#my-custom-package@0.1.0","manifest_path":"/path/to/custom-package/Cargo.toml","targets":[{"name":"my-custom-bin","kind":["bin"],"src_path":"/path/to/custom-package/src/main.rs"}]}]}"#,
1474 "/path/to/custom-package/src/main.rs",
1475 Some((
1476 Some(TargetInfo {
1477 package_name: "my-custom-package".into(),
1478 target_name: "my-custom-bin".into(),
1479 required_features: Vec::new(),
1480 target_kind: TargetKind::Bin,
1481 }),
1482 Arc::from("/path/to/custom-package".as_ref()),
1483 )),
1484 ),
1485 (
1486 r#"{"packages":[{"id":"path+file:///path/to/custom-package#my-custom-package@0.1.0","targets":[{"name":"my-custom-bin","kind":["example"],"src_path":"/path/to/custom-package/src/main.rs"}],"manifest_path":"/path/to/custom-package/Cargo.toml"}]}"#,
1487 "/path/to/custom-package/src/main.rs",
1488 Some((
1489 Some(TargetInfo {
1490 package_name: "my-custom-package".into(),
1491 target_name: "my-custom-bin".into(),
1492 required_features: Vec::new(),
1493 target_kind: TargetKind::Example,
1494 }),
1495 Arc::from("/path/to/custom-package".as_ref()),
1496 )),
1497 ),
1498 (
1499 r#"{"packages":[{"id":"path+file:///path/to/custom-package#my-custom-package@0.1.0","manifest_path":"/path/to/custom-package/Cargo.toml","targets":[{"name":"my-custom-bin","kind":["example"],"src_path":"/path/to/custom-package/src/main.rs","required-features":["foo","bar"]}]}]}"#,
1500 "/path/to/custom-package/src/main.rs",
1501 Some((
1502 Some(TargetInfo {
1503 package_name: "my-custom-package".into(),
1504 target_name: "my-custom-bin".into(),
1505 required_features: vec!["foo".to_owned(), "bar".to_owned()],
1506 target_kind: TargetKind::Example,
1507 }),
1508 Arc::from("/path/to/custom-package".as_ref()),
1509 )),
1510 ),
1511 (
1512 r#"{"packages":[{"id":"path+file:///path/to/custom-package#my-custom-package@0.1.0","targets":[{"name":"my-custom-bin","kind":["example"],"src_path":"/path/to/custom-package/src/main.rs","required-features":[]}],"manifest_path":"/path/to/custom-package/Cargo.toml"}]}"#,
1513 "/path/to/custom-package/src/main.rs",
1514 Some((
1515 Some(TargetInfo {
1516 package_name: "my-custom-package".into(),
1517 target_name: "my-custom-bin".into(),
1518 required_features: vec![],
1519 target_kind: TargetKind::Example,
1520 }),
1521 Arc::from("/path/to/custom-package".as_ref()),
1522 )),
1523 ),
1524 (
1525 r#"{"packages":[{"id":"path+file:///path/to/custom-package#my-custom-package@0.1.0","targets":[{"name":"my-custom-package","kind":["lib"],"src_path":"/path/to/custom-package/src/main.rs"}],"manifest_path":"/path/to/custom-package/Cargo.toml"}]}"#,
1526 "/path/to/custom-package/src/main.rs",
1527 Some((None, Arc::from("/path/to/custom-package".as_ref()))),
1528 ),
1529 ] {
1530 let metadata: CargoMetadata = serde_json::from_str(input).context(input).unwrap();
1531
1532 let absolute_path = Path::new(absolute_path);
1533
1534 assert_eq!(target_info_from_metadata(metadata, absolute_path), expected);
1535 }
1536 }
1537
1538 #[test]
1539 fn test_rust_test_fragment() {
1540 #[track_caller]
1541 fn check(
1542 variables: impl IntoIterator<Item = (VariableName, &'static str)>,
1543 path: &str,
1544 expected: &str,
1545 ) {
1546 let path = Path::new(path);
1547 let found = test_fragment(
1548 &TaskVariables::from_iter(variables.into_iter().map(|(k, v)| (k, v.to_owned()))),
1549 path,
1550 &path.file_stem().unwrap().to_str().unwrap(),
1551 );
1552 assert_eq!(expected, found);
1553 }
1554
1555 check([], "/project/src/lib.rs", "--lib");
1556 check([], "/project/src/foo/mod.rs", "foo");
1557 check(
1558 [
1559 (RUST_BIN_KIND_TASK_VARIABLE.clone(), "bin"),
1560 (RUST_BIN_NAME_TASK_VARIABLE, "x"),
1561 ],
1562 "/project/src/main.rs",
1563 "--bin=x",
1564 );
1565 check([], "/project/src/main.rs", "--");
1566 }
1567}