1use anyhow::{Context as _, Result};
2use async_compression::futures::bufread::GzipDecoder;
3use async_trait::async_trait;
4use collections::HashMap;
5use futures::{StreamExt, io::BufReader};
6use gpui::{App, AppContext, AsyncApp, SharedString, Task};
7use http_client::github::AssetKind;
8use http_client::github::{GitHubLspBinaryVersion, latest_github_release};
9pub use language::*;
10use lsp::{InitializeParams, LanguageServerBinary};
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::archive::extract_zip;
26use util::merge_json_value_into;
27use util::{ResultExt, fs::remove_matching, maybe};
28
29use crate::language_settings::language_settings;
30
31pub struct RustLspAdapter;
32
33#[cfg(target_os = "macos")]
34impl RustLspAdapter {
35 const GITHUB_ASSET_KIND: AssetKind = AssetKind::Gz;
36 const ARCH_SERVER_NAME: &str = "apple-darwin";
37}
38
39#[cfg(target_os = "linux")]
40impl RustLspAdapter {
41 const GITHUB_ASSET_KIND: AssetKind = AssetKind::Gz;
42 const ARCH_SERVER_NAME: &str = "unknown-linux-gnu";
43}
44
45#[cfg(target_os = "freebsd")]
46impl RustLspAdapter {
47 const GITHUB_ASSET_KIND: AssetKind = AssetKind::Gz;
48 const ARCH_SERVER_NAME: &str = "unknown-freebsd";
49}
50
51#[cfg(target_os = "windows")]
52impl RustLspAdapter {
53 const GITHUB_ASSET_KIND: AssetKind = AssetKind::Zip;
54 const ARCH_SERVER_NAME: &str = "pc-windows-msvc";
55}
56
57const SERVER_NAME: LanguageServerName = LanguageServerName::new_static("rust-analyzer");
58
59impl RustLspAdapter {
60 fn build_asset_name() -> String {
61 let extension = match Self::GITHUB_ASSET_KIND {
62 AssetKind::TarGz => "tar.gz",
63 AssetKind::Gz => "gz",
64 AssetKind::Zip => "zip",
65 };
66
67 format!(
68 "{}-{}-{}.{}",
69 SERVER_NAME,
70 std::env::consts::ARCH,
71 Self::ARCH_SERVER_NAME,
72 extension
73 )
74 }
75}
76
77pub(crate) struct CargoManifestProvider;
78
79impl ManifestProvider for CargoManifestProvider {
80 fn name(&self) -> ManifestName {
81 SharedString::new_static("Cargo.toml").into()
82 }
83
84 fn search(
85 &self,
86 ManifestQuery {
87 path,
88 depth,
89 delegate,
90 }: ManifestQuery,
91 ) -> Option<Arc<Path>> {
92 let mut outermost_cargo_toml = None;
93 for path in path.ancestors().take(depth) {
94 let p = path.join("Cargo.toml");
95 if delegate.exists(&p, Some(false)) {
96 outermost_cargo_toml = Some(Arc::from(path));
97 }
98 }
99
100 outermost_cargo_toml
101 }
102}
103
104#[async_trait(?Send)]
105impl LspAdapter for RustLspAdapter {
106 fn name(&self) -> LanguageServerName {
107 SERVER_NAME.clone()
108 }
109
110 fn manifest_name(&self) -> Option<ManifestName> {
111 Some(SharedString::new_static("Cargo.toml").into())
112 }
113
114 async fn check_if_user_installed(
115 &self,
116 delegate: &dyn LspAdapterDelegate,
117 _: Arc<dyn LanguageToolchainStore>,
118 _: &AsyncApp,
119 ) -> Option<LanguageServerBinary> {
120 let path = delegate.which("rust-analyzer".as_ref()).await?;
121 let env = delegate.shell_env().await;
122
123 // It is surprisingly common for ~/.cargo/bin/rust-analyzer to be a symlink to
124 // /usr/bin/rust-analyzer that fails when you run it; so we need to test it.
125 log::info!("found rust-analyzer in PATH. trying to run `rust-analyzer --help`");
126 let result = delegate
127 .try_exec(LanguageServerBinary {
128 path: path.clone(),
129 arguments: vec!["--help".into()],
130 env: Some(env.clone()),
131 })
132 .await;
133 if let Err(err) = result {
134 log::debug!(
135 "failed to run rust-analyzer after detecting it in PATH: binary: {:?}: {}",
136 path,
137 err
138 );
139 return None;
140 }
141
142 Some(LanguageServerBinary {
143 path,
144 env: Some(env),
145 arguments: vec![],
146 })
147 }
148
149 async fn fetch_latest_server_version(
150 &self,
151 delegate: &dyn LspAdapterDelegate,
152 ) -> Result<Box<dyn 'static + Send + Any>> {
153 let release = latest_github_release(
154 "rust-lang/rust-analyzer",
155 true,
156 false,
157 delegate.http_client(),
158 )
159 .await?;
160 let asset_name = Self::build_asset_name();
161
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 }))
171 }
172
173 async fn fetch_server_binary(
174 &self,
175 version: Box<dyn 'static + Send + Any>,
176 container_dir: PathBuf,
177 delegate: &dyn LspAdapterDelegate,
178 ) -> Result<LanguageServerBinary> {
179 let version = version.downcast::<GitHubLspBinaryVersion>().unwrap();
180 let destination_path = container_dir.join(format!("rust-analyzer-{}", version.name));
181 let server_path = match Self::GITHUB_ASSET_KIND {
182 AssetKind::TarGz | AssetKind::Gz => destination_path.clone(), // Tar and gzip extract in place.
183 AssetKind::Zip => destination_path.clone().join("rust-analyzer.exe"), // zip contains a .exe
184 };
185
186 if fs::metadata(&server_path).await.is_err() {
187 remove_matching(&container_dir, |entry| entry != destination_path).await;
188
189 let mut response = delegate
190 .http_client()
191 .get(&version.url, Default::default(), true)
192 .await
193 .with_context(|| format!("downloading release from {}", version.url))?;
194 match Self::GITHUB_ASSET_KIND {
195 AssetKind::TarGz => {
196 let decompressed_bytes = GzipDecoder::new(BufReader::new(response.body_mut()));
197 let archive = async_tar::Archive::new(decompressed_bytes);
198 archive.unpack(&destination_path).await.with_context(|| {
199 format!("extracting {} to {:?}", version.url, destination_path)
200 })?;
201 }
202 AssetKind::Gz => {
203 let mut decompressed_bytes =
204 GzipDecoder::new(BufReader::new(response.body_mut()));
205 let mut file =
206 fs::File::create(&destination_path).await.with_context(|| {
207 format!(
208 "creating a file {:?} for a download from {}",
209 destination_path, version.url,
210 )
211 })?;
212 futures::io::copy(&mut decompressed_bytes, &mut file)
213 .await
214 .with_context(|| {
215 format!("extracting {} to {:?}", version.url, destination_path)
216 })?;
217 }
218 AssetKind::Zip => {
219 extract_zip(&destination_path, response.body_mut())
220 .await
221 .with_context(|| {
222 format!("unzipping {} to {:?}", version.url, destination_path)
223 })?;
224 }
225 };
226
227 // todo("windows")
228 #[cfg(not(windows))]
229 {
230 fs::set_permissions(
231 &server_path,
232 <fs::Permissions as fs::unix::PermissionsExt>::from_mode(0o755),
233 )
234 .await?;
235 }
236 }
237
238 Ok(LanguageServerBinary {
239 path: server_path,
240 env: None,
241 arguments: Default::default(),
242 })
243 }
244
245 async fn cached_server_binary(
246 &self,
247 container_dir: PathBuf,
248 _: &dyn LspAdapterDelegate,
249 ) -> Option<LanguageServerBinary> {
250 get_cached_server_binary(container_dir).await
251 }
252
253 fn disk_based_diagnostic_sources(&self) -> Vec<String> {
254 vec![CARGO_DIAGNOSTICS_SOURCE_NAME.to_owned()]
255 }
256
257 fn disk_based_diagnostics_progress_token(&self) -> Option<String> {
258 Some("rust-analyzer/flycheck".into())
259 }
260
261 fn process_diagnostics(
262 &self,
263 params: &mut lsp::PublishDiagnosticsParams,
264 _: LanguageServerId,
265 _: Option<&'_ Buffer>,
266 ) {
267 static REGEX: LazyLock<Regex> =
268 LazyLock::new(|| Regex::new(r"(?m)`([^`]+)\n`$").expect("Failed to create REGEX"));
269
270 for diagnostic in &mut params.diagnostics {
271 for message in diagnostic
272 .related_information
273 .iter_mut()
274 .flatten()
275 .map(|info| &mut info.message)
276 .chain([&mut diagnostic.message])
277 {
278 if let Cow::Owned(sanitized) = REGEX.replace_all(message, "`$1`") {
279 *message = sanitized;
280 }
281 }
282 }
283 }
284
285 fn diagnostic_message_to_markdown(&self, message: &str) -> Option<String> {
286 static REGEX: LazyLock<Regex> =
287 LazyLock::new(|| Regex::new(r"(?m)\n *").expect("Failed to create REGEX"));
288 Some(REGEX.replace_all(message, "\n\n").to_string())
289 }
290
291 async fn label_for_completion(
292 &self,
293 completion: &lsp::CompletionItem,
294 language: &Arc<Language>,
295 ) -> Option<CodeLabel> {
296 let detail = completion
297 .label_details
298 .as_ref()
299 .and_then(|detail| detail.detail.as_ref())
300 .or(completion.detail.as_ref())
301 .map(|detail| detail.trim());
302 let function_signature = completion
303 .label_details
304 .as_ref()
305 .and_then(|detail| detail.description.as_deref())
306 .or(completion.detail.as_deref());
307 match (detail, completion.kind) {
308 (Some(detail), Some(lsp::CompletionItemKind::FIELD)) => {
309 let name = &completion.label;
310 let text = format!("{name}: {detail}");
311 let prefix = "struct S { ";
312 let source = Rope::from(format!("{prefix}{text} }}"));
313 let runs =
314 language.highlight_text(&source, prefix.len()..prefix.len() + text.len());
315 return Some(CodeLabel {
316 text,
317 runs,
318 filter_range: 0..name.len(),
319 });
320 }
321 (
322 Some(detail),
323 Some(lsp::CompletionItemKind::CONSTANT | lsp::CompletionItemKind::VARIABLE),
324 ) if completion.insert_text_format != Some(lsp::InsertTextFormat::SNIPPET) => {
325 let name = &completion.label;
326 let text = format!(
327 "{}: {}",
328 name,
329 completion.detail.as_deref().unwrap_or(detail)
330 );
331 let prefix = "let ";
332 let source = Rope::from(format!("{prefix}{text} = ();"));
333 let runs =
334 language.highlight_text(&source, prefix.len()..prefix.len() + text.len());
335 return Some(CodeLabel {
336 text,
337 runs,
338 filter_range: 0..name.len(),
339 });
340 }
341 (
342 Some(detail),
343 Some(lsp::CompletionItemKind::FUNCTION | lsp::CompletionItemKind::METHOD),
344 ) => {
345 static REGEX: LazyLock<Regex> = LazyLock::new(|| Regex::new("\\(…?\\)").unwrap());
346 const FUNCTION_PREFIXES: [&str; 6] = [
347 "async fn",
348 "async unsafe fn",
349 "const fn",
350 "const unsafe fn",
351 "unsafe fn",
352 "fn",
353 ];
354 // Is it function `async`?
355 let fn_keyword = FUNCTION_PREFIXES.iter().find_map(|prefix| {
356 function_signature.as_ref().and_then(|signature| {
357 signature
358 .strip_prefix(*prefix)
359 .map(|suffix| (*prefix, suffix))
360 })
361 });
362 // fn keyword should be followed by opening parenthesis.
363 if let Some((prefix, suffix)) = fn_keyword {
364 let mut text = REGEX.replace(&completion.label, suffix).to_string();
365 let source = Rope::from(format!("{prefix} {text} {{}}"));
366 let run_start = prefix.len() + 1;
367 let runs = language.highlight_text(&source, run_start..run_start + text.len());
368 if detail.starts_with("(") {
369 text.push(' ');
370 text.push_str(&detail);
371 }
372
373 return Some(CodeLabel {
374 filter_range: 0..completion.label.find('(').unwrap_or(text.len()),
375 text,
376 runs,
377 });
378 } else if completion
379 .detail
380 .as_ref()
381 .map_or(false, |detail| detail.starts_with("macro_rules! "))
382 {
383 let source = Rope::from(completion.label.as_str());
384 let runs = language.highlight_text(&source, 0..completion.label.len());
385
386 return Some(CodeLabel {
387 filter_range: 0..completion.label.len(),
388 text: completion.label.clone(),
389 runs,
390 });
391 }
392 }
393 (_, Some(kind)) => {
394 let highlight_name = match kind {
395 lsp::CompletionItemKind::STRUCT
396 | lsp::CompletionItemKind::INTERFACE
397 | lsp::CompletionItemKind::ENUM => Some("type"),
398 lsp::CompletionItemKind::ENUM_MEMBER => Some("variant"),
399 lsp::CompletionItemKind::KEYWORD => Some("keyword"),
400 lsp::CompletionItemKind::VALUE | lsp::CompletionItemKind::CONSTANT => {
401 Some("constant")
402 }
403 _ => None,
404 };
405
406 let mut label = completion.label.clone();
407 if let Some(detail) = detail.filter(|detail| detail.starts_with("(")) {
408 label.push(' ');
409 label.push_str(detail);
410 }
411 let mut label = CodeLabel::plain(label, None);
412 if let Some(highlight_name) = highlight_name {
413 let highlight_id = language.grammar()?.highlight_id_for_name(highlight_name)?;
414 label.runs.push((
415 0..label.text.rfind('(').unwrap_or(completion.label.len()),
416 highlight_id,
417 ));
418 }
419
420 return Some(label);
421 }
422 _ => {}
423 }
424 None
425 }
426
427 async fn label_for_symbol(
428 &self,
429 name: &str,
430 kind: lsp::SymbolKind,
431 language: &Arc<Language>,
432 ) -> Option<CodeLabel> {
433 let (text, filter_range, display_range) = match kind {
434 lsp::SymbolKind::METHOD | lsp::SymbolKind::FUNCTION => {
435 let text = format!("fn {} () {{}}", name);
436 let filter_range = 3..3 + name.len();
437 let display_range = 0..filter_range.end;
438 (text, filter_range, display_range)
439 }
440 lsp::SymbolKind::STRUCT => {
441 let text = format!("struct {} {{}}", name);
442 let filter_range = 7..7 + name.len();
443 let display_range = 0..filter_range.end;
444 (text, filter_range, display_range)
445 }
446 lsp::SymbolKind::ENUM => {
447 let text = format!("enum {} {{}}", name);
448 let filter_range = 5..5 + name.len();
449 let display_range = 0..filter_range.end;
450 (text, filter_range, display_range)
451 }
452 lsp::SymbolKind::INTERFACE => {
453 let text = format!("trait {} {{}}", name);
454 let filter_range = 6..6 + name.len();
455 let display_range = 0..filter_range.end;
456 (text, filter_range, display_range)
457 }
458 lsp::SymbolKind::CONSTANT => {
459 let text = format!("const {}: () = ();", name);
460 let filter_range = 6..6 + name.len();
461 let display_range = 0..filter_range.end;
462 (text, filter_range, display_range)
463 }
464 lsp::SymbolKind::MODULE => {
465 let text = format!("mod {} {{}}", name);
466 let filter_range = 4..4 + name.len();
467 let display_range = 0..filter_range.end;
468 (text, filter_range, display_range)
469 }
470 lsp::SymbolKind::TYPE_PARAMETER => {
471 let text = format!("type {} {{}}", name);
472 let filter_range = 5..5 + name.len();
473 let display_range = 0..filter_range.end;
474 (text, filter_range, display_range)
475 }
476 _ => return None,
477 };
478
479 Some(CodeLabel {
480 runs: language.highlight_text(&text.as_str().into(), display_range.clone()),
481 text: text[display_range].to_string(),
482 filter_range,
483 })
484 }
485
486 fn prepare_initialize_params(
487 &self,
488 mut original: InitializeParams,
489 cx: &App,
490 ) -> Result<InitializeParams> {
491 let enable_lsp_tasks = ProjectSettings::get_global(cx)
492 .lsp
493 .get(&SERVER_NAME)
494 .map_or(false, |s| s.enable_lsp_tasks);
495 if enable_lsp_tasks {
496 let experimental = json!({
497 "runnables": {
498 "kinds": [ "cargo", "shell" ],
499 },
500 });
501 if let Some(original_experimental) = &mut original.capabilities.experimental {
502 merge_json_value_into(experimental, original_experimental);
503 } else {
504 original.capabilities.experimental = Some(experimental);
505 }
506 }
507
508 let cargo_diagnostics_fetched_separately = ProjectSettings::get_global(cx)
509 .diagnostics
510 .fetch_cargo_diagnostics();
511 if cargo_diagnostics_fetched_separately {
512 let disable_check_on_save = json!({
513 "checkOnSave": false,
514 });
515 if let Some(initialization_options) = &mut original.initialization_options {
516 merge_json_value_into(disable_check_on_save, initialization_options);
517 } else {
518 original.initialization_options = Some(disable_check_on_save);
519 }
520 }
521
522 Ok(original)
523 }
524}
525
526pub(crate) struct RustContextProvider;
527
528const RUST_PACKAGE_TASK_VARIABLE: VariableName =
529 VariableName::Custom(Cow::Borrowed("RUST_PACKAGE"));
530
531/// The bin name corresponding to the current file in Cargo.toml
532const RUST_BIN_NAME_TASK_VARIABLE: VariableName =
533 VariableName::Custom(Cow::Borrowed("RUST_BIN_NAME"));
534
535/// The bin kind (bin/example) corresponding to the current file in Cargo.toml
536const RUST_BIN_KIND_TASK_VARIABLE: VariableName =
537 VariableName::Custom(Cow::Borrowed("RUST_BIN_KIND"));
538
539/// The flag to list required features for executing a bin, if any
540const RUST_BIN_REQUIRED_FEATURES_FLAG_TASK_VARIABLE: VariableName =
541 VariableName::Custom(Cow::Borrowed("RUST_BIN_REQUIRED_FEATURES_FLAG"));
542
543/// The list of required features for executing a bin, if any
544const RUST_BIN_REQUIRED_FEATURES_TASK_VARIABLE: VariableName =
545 VariableName::Custom(Cow::Borrowed("RUST_BIN_REQUIRED_FEATURES"));
546
547const RUST_TEST_FRAGMENT_TASK_VARIABLE: VariableName =
548 VariableName::Custom(Cow::Borrowed("RUST_TEST_FRAGMENT"));
549
550const RUST_DOC_TEST_NAME_TASK_VARIABLE: VariableName =
551 VariableName::Custom(Cow::Borrowed("RUST_DOC_TEST_NAME"));
552
553const RUST_TEST_NAME_TASK_VARIABLE: VariableName =
554 VariableName::Custom(Cow::Borrowed("RUST_TEST_NAME"));
555
556impl ContextProvider for RustContextProvider {
557 fn build_context(
558 &self,
559 task_variables: &TaskVariables,
560 location: &Location,
561 project_env: Option<HashMap<String, String>>,
562 _: Arc<dyn LanguageToolchainStore>,
563 cx: &mut gpui::App,
564 ) -> Task<Result<TaskVariables>> {
565 let local_abs_path = location
566 .buffer
567 .read(cx)
568 .file()
569 .and_then(|file| Some(file.as_local()?.abs_path(cx)));
570
571 let mut variables = TaskVariables::default();
572
573 if let (Some(path), Some(stem)) = (&local_abs_path, task_variables.get(&VariableName::Stem))
574 {
575 let fragment = test_fragment(&variables, &path, stem);
576 variables.insert(RUST_TEST_FRAGMENT_TASK_VARIABLE, fragment);
577 };
578 if let Some(test_name) =
579 task_variables.get(&VariableName::Custom(Cow::Borrowed("_test_name")))
580 {
581 variables.insert(RUST_TEST_NAME_TASK_VARIABLE, test_name.into());
582 }
583 if let Some(doc_test_name) =
584 task_variables.get(&VariableName::Custom(Cow::Borrowed("_doc_test_name")))
585 {
586 variables.insert(RUST_DOC_TEST_NAME_TASK_VARIABLE, doc_test_name.into());
587 }
588 cx.background_spawn(async move {
589 if let Some(path) = local_abs_path
590 .as_deref()
591 .and_then(|local_abs_path| local_abs_path.parent())
592 {
593 if let Some(package_name) =
594 human_readable_package_name(path, project_env.as_ref()).await
595 {
596 variables.insert(RUST_PACKAGE_TASK_VARIABLE.clone(), package_name);
597 }
598 }
599 if let Some(path) = local_abs_path.as_ref() {
600 if let Some(target) = target_info_from_abs_path(&path, project_env.as_ref()).await {
601 variables.extend(TaskVariables::from_iter([
602 (RUST_PACKAGE_TASK_VARIABLE.clone(), target.package_name),
603 (RUST_BIN_NAME_TASK_VARIABLE.clone(), target.target_name),
604 (
605 RUST_BIN_KIND_TASK_VARIABLE.clone(),
606 target.target_kind.to_string(),
607 ),
608 ]));
609 if target.required_features.is_empty() {
610 variables.insert(RUST_BIN_REQUIRED_FEATURES_FLAG_TASK_VARIABLE, "".into());
611 variables.insert(RUST_BIN_REQUIRED_FEATURES_TASK_VARIABLE, "".into());
612 } else {
613 variables.insert(
614 RUST_BIN_REQUIRED_FEATURES_FLAG_TASK_VARIABLE.clone(),
615 "--features".to_string(),
616 );
617 variables.insert(
618 RUST_BIN_REQUIRED_FEATURES_TASK_VARIABLE.clone(),
619 target.required_features.join(","),
620 );
621 }
622 }
623 }
624 Ok(variables)
625 })
626 }
627
628 fn associated_tasks(
629 &self,
630 file: Option<Arc<dyn language::File>>,
631 cx: &App,
632 ) -> Option<TaskTemplates> {
633 const DEFAULT_RUN_NAME_STR: &str = "RUST_DEFAULT_PACKAGE_RUN";
634 const CUSTOM_TARGET_DIR: &str = "RUST_TARGET_DIR";
635
636 let language_sets = language_settings(Some("Rust".into()), file.as_ref(), cx);
637 let package_to_run = language_sets
638 .tasks
639 .variables
640 .get(DEFAULT_RUN_NAME_STR)
641 .cloned();
642 let custom_target_dir = language_sets
643 .tasks
644 .variables
645 .get(CUSTOM_TARGET_DIR)
646 .cloned();
647 let run_task_args = if let Some(package_to_run) = package_to_run.clone() {
648 vec!["run".into(), "-p".into(), package_to_run]
649 } else {
650 vec!["run".into()]
651 };
652 let mut task_templates = vec![
653 TaskTemplate {
654 label: format!(
655 "Check (package: {})",
656 RUST_PACKAGE_TASK_VARIABLE.template_value(),
657 ),
658 command: "cargo".into(),
659 args: vec![
660 "check".into(),
661 "-p".into(),
662 RUST_PACKAGE_TASK_VARIABLE.template_value(),
663 ],
664 cwd: Some("$ZED_DIRNAME".to_owned()),
665 ..TaskTemplate::default()
666 },
667 TaskTemplate {
668 label: "Check all targets (workspace)".into(),
669 command: "cargo".into(),
670 args: vec!["check".into(), "--workspace".into(), "--all-targets".into()],
671 cwd: Some("$ZED_DIRNAME".to_owned()),
672 ..TaskTemplate::default()
673 },
674 TaskTemplate {
675 label: format!(
676 "Test '{}' (package: {})",
677 RUST_TEST_NAME_TASK_VARIABLE.template_value(),
678 RUST_PACKAGE_TASK_VARIABLE.template_value(),
679 ),
680 command: "cargo".into(),
681 args: vec![
682 "test".into(),
683 "-p".into(),
684 RUST_PACKAGE_TASK_VARIABLE.template_value(),
685 "--".into(),
686 "--nocapture".into(),
687 "--include-ignored".into(),
688 RUST_TEST_NAME_TASK_VARIABLE.template_value(),
689 ],
690 tags: vec!["rust-test".to_owned()],
691 cwd: Some("$ZED_DIRNAME".to_owned()),
692 ..TaskTemplate::default()
693 },
694 TaskTemplate {
695 label: format!(
696 "Doc test '{}' (package: {})",
697 RUST_DOC_TEST_NAME_TASK_VARIABLE.template_value(),
698 RUST_PACKAGE_TASK_VARIABLE.template_value(),
699 ),
700 command: "cargo".into(),
701 args: vec![
702 "test".into(),
703 "--doc".into(),
704 "-p".into(),
705 RUST_PACKAGE_TASK_VARIABLE.template_value(),
706 "--".into(),
707 "--nocapture".into(),
708 "--include-ignored".into(),
709 RUST_DOC_TEST_NAME_TASK_VARIABLE.template_value(),
710 ],
711 tags: vec!["rust-doc-test".to_owned()],
712 cwd: Some("$ZED_DIRNAME".to_owned()),
713 ..TaskTemplate::default()
714 },
715 TaskTemplate {
716 label: format!(
717 "Test mod '{}' (package: {})",
718 VariableName::Stem.template_value(),
719 RUST_PACKAGE_TASK_VARIABLE.template_value(),
720 ),
721 command: "cargo".into(),
722 args: vec![
723 "test".into(),
724 "-p".into(),
725 RUST_PACKAGE_TASK_VARIABLE.template_value(),
726 "--".into(),
727 RUST_TEST_FRAGMENT_TASK_VARIABLE.template_value(),
728 ],
729 tags: vec!["rust-mod-test".to_owned()],
730 cwd: Some("$ZED_DIRNAME".to_owned()),
731 ..TaskTemplate::default()
732 },
733 TaskTemplate {
734 label: format!(
735 "Run {} {} (package: {})",
736 RUST_BIN_KIND_TASK_VARIABLE.template_value(),
737 RUST_BIN_NAME_TASK_VARIABLE.template_value(),
738 RUST_PACKAGE_TASK_VARIABLE.template_value(),
739 ),
740 command: "cargo".into(),
741 args: vec![
742 "run".into(),
743 "-p".into(),
744 RUST_PACKAGE_TASK_VARIABLE.template_value(),
745 format!("--{}", RUST_BIN_KIND_TASK_VARIABLE.template_value()),
746 RUST_BIN_NAME_TASK_VARIABLE.template_value(),
747 RUST_BIN_REQUIRED_FEATURES_FLAG_TASK_VARIABLE.template_value(),
748 RUST_BIN_REQUIRED_FEATURES_TASK_VARIABLE.template_value(),
749 ],
750 cwd: Some("$ZED_DIRNAME".to_owned()),
751 tags: vec!["rust-main".to_owned()],
752 ..TaskTemplate::default()
753 },
754 TaskTemplate {
755 label: format!(
756 "Test (package: {})",
757 RUST_PACKAGE_TASK_VARIABLE.template_value()
758 ),
759 command: "cargo".into(),
760 args: vec![
761 "test".into(),
762 "-p".into(),
763 RUST_PACKAGE_TASK_VARIABLE.template_value(),
764 ],
765 cwd: Some("$ZED_DIRNAME".to_owned()),
766 ..TaskTemplate::default()
767 },
768 TaskTemplate {
769 label: "Run".into(),
770 command: "cargo".into(),
771 args: run_task_args,
772 cwd: Some("$ZED_DIRNAME".to_owned()),
773 ..TaskTemplate::default()
774 },
775 TaskTemplate {
776 label: "Clean".into(),
777 command: "cargo".into(),
778 args: vec!["clean".into()],
779 cwd: Some("$ZED_DIRNAME".to_owned()),
780 ..TaskTemplate::default()
781 },
782 ];
783
784 if let Some(custom_target_dir) = custom_target_dir {
785 task_templates = task_templates
786 .into_iter()
787 .map(|mut task_template| {
788 let mut args = task_template.args.split_off(1);
789 task_template.args.append(&mut vec![
790 "--target-dir".to_string(),
791 custom_target_dir.clone(),
792 ]);
793 task_template.args.append(&mut args);
794
795 task_template
796 })
797 .collect();
798 }
799
800 Some(TaskTemplates(task_templates))
801 }
802
803 fn lsp_task_source(&self) -> Option<LanguageServerName> {
804 Some(SERVER_NAME)
805 }
806}
807
808/// Part of the data structure of Cargo metadata
809#[derive(serde::Deserialize)]
810struct CargoMetadata {
811 packages: Vec<CargoPackage>,
812}
813
814#[derive(serde::Deserialize)]
815struct CargoPackage {
816 id: String,
817 targets: Vec<CargoTarget>,
818}
819
820#[derive(serde::Deserialize)]
821struct CargoTarget {
822 name: String,
823 kind: Vec<String>,
824 src_path: String,
825 #[serde(rename = "required-features", default)]
826 required_features: Vec<String>,
827}
828
829#[derive(Debug, PartialEq)]
830enum TargetKind {
831 Bin,
832 Example,
833}
834
835impl Display for TargetKind {
836 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
837 match self {
838 TargetKind::Bin => write!(f, "bin"),
839 TargetKind::Example => write!(f, "example"),
840 }
841 }
842}
843
844impl TryFrom<&str> for TargetKind {
845 type Error = ();
846 fn try_from(value: &str) -> Result<Self, ()> {
847 match value {
848 "bin" => Ok(Self::Bin),
849 "example" => Ok(Self::Example),
850 _ => Err(()),
851 }
852 }
853}
854/// Which package and binary target are we in?
855#[derive(Debug, PartialEq)]
856struct TargetInfo {
857 package_name: String,
858 target_name: String,
859 target_kind: TargetKind,
860 required_features: Vec<String>,
861}
862
863async fn target_info_from_abs_path(
864 abs_path: &Path,
865 project_env: Option<&HashMap<String, String>>,
866) -> Option<TargetInfo> {
867 let mut command = util::command::new_smol_command("cargo");
868 if let Some(envs) = project_env {
869 command.envs(envs);
870 }
871 let output = command
872 .current_dir(abs_path.parent()?)
873 .arg("metadata")
874 .arg("--no-deps")
875 .arg("--format-version")
876 .arg("1")
877 .output()
878 .await
879 .log_err()?
880 .stdout;
881
882 let metadata: CargoMetadata = serde_json::from_slice(&output).log_err()?;
883
884 target_info_from_metadata(metadata, abs_path)
885}
886
887fn target_info_from_metadata(metadata: CargoMetadata, abs_path: &Path) -> Option<TargetInfo> {
888 for package in metadata.packages {
889 for target in package.targets {
890 let Some(bin_kind) = target
891 .kind
892 .iter()
893 .find_map(|kind| TargetKind::try_from(kind.as_ref()).ok())
894 else {
895 continue;
896 };
897 let target_path = PathBuf::from(target.src_path);
898 if target_path == abs_path {
899 return package_name_from_pkgid(&package.id).map(|package_name| TargetInfo {
900 package_name: package_name.to_owned(),
901 target_name: target.name,
902 required_features: target.required_features,
903 target_kind: bin_kind,
904 });
905 }
906 }
907 }
908
909 None
910}
911
912async fn human_readable_package_name(
913 package_directory: &Path,
914 project_env: Option<&HashMap<String, String>>,
915) -> Option<String> {
916 let mut command = util::command::new_smol_command("cargo");
917 if let Some(envs) = project_env {
918 command.envs(envs);
919 }
920 let pkgid = String::from_utf8(
921 command
922 .current_dir(package_directory)
923 .arg("pkgid")
924 .output()
925 .await
926 .log_err()?
927 .stdout,
928 )
929 .ok()?;
930 Some(package_name_from_pkgid(&pkgid)?.to_owned())
931}
932
933// For providing local `cargo check -p $pkgid` task, we do not need most of the information we have returned.
934// Output example in the root of Zed project:
935// ```sh
936// ❯ cargo pkgid zed
937// path+file:///absolute/path/to/project/zed/crates/zed#0.131.0
938// ```
939// Another variant, if a project has a custom package name or hyphen in the name:
940// ```
941// path+file:///absolute/path/to/project/custom-package#my-custom-package@0.1.0
942// ```
943//
944// Extracts the package name from the output according to the spec:
945// https://doc.rust-lang.org/cargo/reference/pkgid-spec.html#specification-grammar
946fn package_name_from_pkgid(pkgid: &str) -> Option<&str> {
947 fn split_off_suffix(input: &str, suffix_start: char) -> &str {
948 match input.rsplit_once(suffix_start) {
949 Some((without_suffix, _)) => without_suffix,
950 None => input,
951 }
952 }
953
954 let (version_prefix, version_suffix) = pkgid.trim().rsplit_once('#')?;
955 let package_name = match version_suffix.rsplit_once('@') {
956 Some((custom_package_name, _version)) => custom_package_name,
957 None => {
958 let host_and_path = split_off_suffix(version_prefix, '?');
959 let (_, package_name) = host_and_path.rsplit_once('/')?;
960 package_name
961 }
962 };
963 Some(package_name)
964}
965
966async fn get_cached_server_binary(container_dir: PathBuf) -> Option<LanguageServerBinary> {
967 maybe!(async {
968 let mut last = None;
969 let mut entries = fs::read_dir(&container_dir).await?;
970 while let Some(entry) = entries.next().await {
971 last = Some(entry?.path());
972 }
973
974 anyhow::Ok(LanguageServerBinary {
975 path: last.context("no cached binary")?,
976 env: None,
977 arguments: Default::default(),
978 })
979 })
980 .await
981 .log_err()
982}
983
984fn test_fragment(variables: &TaskVariables, path: &Path, stem: &str) -> String {
985 let fragment = if stem == "lib" {
986 // This isn't quite right---it runs the tests for the entire library, rather than
987 // just for the top-level `mod tests`. But we don't really have the means here to
988 // filter out just that module.
989 Some("--lib".to_owned())
990 } else if stem == "mod" {
991 maybe!({ Some(path.parent()?.file_name()?.to_string_lossy().to_string()) })
992 } else if stem == "main" {
993 if let (Some(bin_name), Some(bin_kind)) = (
994 variables.get(&RUST_BIN_NAME_TASK_VARIABLE),
995 variables.get(&RUST_BIN_KIND_TASK_VARIABLE),
996 ) {
997 Some(format!("--{bin_kind}={bin_name}"))
998 } else {
999 None
1000 }
1001 } else {
1002 Some(stem.to_owned())
1003 };
1004 fragment.unwrap_or_else(|| "--".to_owned())
1005}
1006
1007#[cfg(test)]
1008mod tests {
1009 use std::num::NonZeroU32;
1010
1011 use super::*;
1012 use crate::language;
1013 use gpui::{BorrowAppContext, Hsla, TestAppContext};
1014 use language::language_settings::AllLanguageSettings;
1015 use lsp::CompletionItemLabelDetails;
1016 use settings::SettingsStore;
1017 use theme::SyntaxTheme;
1018 use util::path;
1019
1020 #[gpui::test]
1021 async fn test_process_rust_diagnostics() {
1022 let mut params = lsp::PublishDiagnosticsParams {
1023 uri: lsp::Url::from_file_path(path!("/a")).unwrap(),
1024 version: None,
1025 diagnostics: vec![
1026 // no newlines
1027 lsp::Diagnostic {
1028 message: "use of moved value `a`".to_string(),
1029 ..Default::default()
1030 },
1031 // newline at the end of a code span
1032 lsp::Diagnostic {
1033 message: "consider importing this struct: `use b::c;\n`".to_string(),
1034 ..Default::default()
1035 },
1036 // code span starting right after a newline
1037 lsp::Diagnostic {
1038 message: "cannot borrow `self.d` as mutable\n`self` is a `&` reference"
1039 .to_string(),
1040 ..Default::default()
1041 },
1042 ],
1043 };
1044 RustLspAdapter.process_diagnostics(&mut params, LanguageServerId(0), None);
1045
1046 assert_eq!(params.diagnostics[0].message, "use of moved value `a`");
1047
1048 // remove trailing newline from code span
1049 assert_eq!(
1050 params.diagnostics[1].message,
1051 "consider importing this struct: `use b::c;`"
1052 );
1053
1054 // do not remove newline before the start of code span
1055 assert_eq!(
1056 params.diagnostics[2].message,
1057 "cannot borrow `self.d` as mutable\n`self` is a `&` reference"
1058 );
1059 }
1060
1061 #[gpui::test]
1062 async fn test_rust_label_for_completion() {
1063 let adapter = Arc::new(RustLspAdapter);
1064 let language = language("rust", tree_sitter_rust::LANGUAGE.into());
1065 let grammar = language.grammar().unwrap();
1066 let theme = SyntaxTheme::new_test([
1067 ("type", Hsla::default()),
1068 ("keyword", Hsla::default()),
1069 ("function", Hsla::default()),
1070 ("property", Hsla::default()),
1071 ]);
1072
1073 language.set_theme(&theme);
1074
1075 let highlight_function = grammar.highlight_id_for_name("function").unwrap();
1076 let highlight_type = grammar.highlight_id_for_name("type").unwrap();
1077 let highlight_keyword = grammar.highlight_id_for_name("keyword").unwrap();
1078 let highlight_field = grammar.highlight_id_for_name("property").unwrap();
1079
1080 assert_eq!(
1081 adapter
1082 .label_for_completion(
1083 &lsp::CompletionItem {
1084 kind: Some(lsp::CompletionItemKind::FUNCTION),
1085 label: "hello(…)".to_string(),
1086 label_details: Some(CompletionItemLabelDetails {
1087 detail: Some("(use crate::foo)".into()),
1088 description: Some("fn(&mut Option<T>) -> Vec<T>".to_string())
1089 }),
1090 ..Default::default()
1091 },
1092 &language
1093 )
1094 .await,
1095 Some(CodeLabel {
1096 text: "hello(&mut Option<T>) -> Vec<T> (use crate::foo)".to_string(),
1097 filter_range: 0..5,
1098 runs: vec![
1099 (0..5, highlight_function),
1100 (7..10, highlight_keyword),
1101 (11..17, highlight_type),
1102 (18..19, highlight_type),
1103 (25..28, highlight_type),
1104 (29..30, highlight_type),
1105 ],
1106 })
1107 );
1108 assert_eq!(
1109 adapter
1110 .label_for_completion(
1111 &lsp::CompletionItem {
1112 kind: Some(lsp::CompletionItemKind::FUNCTION),
1113 label: "hello(…)".to_string(),
1114 label_details: Some(CompletionItemLabelDetails {
1115 detail: Some(" (use crate::foo)".into()),
1116 description: Some("async fn(&mut Option<T>) -> Vec<T>".to_string()),
1117 }),
1118 ..Default::default()
1119 },
1120 &language
1121 )
1122 .await,
1123 Some(CodeLabel {
1124 text: "hello(&mut Option<T>) -> Vec<T> (use crate::foo)".to_string(),
1125 filter_range: 0..5,
1126 runs: vec![
1127 (0..5, highlight_function),
1128 (7..10, highlight_keyword),
1129 (11..17, highlight_type),
1130 (18..19, highlight_type),
1131 (25..28, highlight_type),
1132 (29..30, highlight_type),
1133 ],
1134 })
1135 );
1136 assert_eq!(
1137 adapter
1138 .label_for_completion(
1139 &lsp::CompletionItem {
1140 kind: Some(lsp::CompletionItemKind::FIELD),
1141 label: "len".to_string(),
1142 detail: Some("usize".to_string()),
1143 ..Default::default()
1144 },
1145 &language
1146 )
1147 .await,
1148 Some(CodeLabel {
1149 text: "len: usize".to_string(),
1150 filter_range: 0..3,
1151 runs: vec![(0..3, highlight_field), (5..10, highlight_type),],
1152 })
1153 );
1154
1155 assert_eq!(
1156 adapter
1157 .label_for_completion(
1158 &lsp::CompletionItem {
1159 kind: Some(lsp::CompletionItemKind::FUNCTION),
1160 label: "hello(…)".to_string(),
1161 label_details: Some(CompletionItemLabelDetails {
1162 detail: Some(" (use crate::foo)".to_string()),
1163 description: Some("fn(&mut Option<T>) -> Vec<T>".to_string()),
1164 }),
1165
1166 ..Default::default()
1167 },
1168 &language
1169 )
1170 .await,
1171 Some(CodeLabel {
1172 text: "hello(&mut Option<T>) -> Vec<T> (use crate::foo)".to_string(),
1173 filter_range: 0..5,
1174 runs: vec![
1175 (0..5, highlight_function),
1176 (7..10, highlight_keyword),
1177 (11..17, highlight_type),
1178 (18..19, highlight_type),
1179 (25..28, highlight_type),
1180 (29..30, highlight_type),
1181 ],
1182 })
1183 );
1184 }
1185
1186 #[gpui::test]
1187 async fn test_rust_label_for_symbol() {
1188 let adapter = Arc::new(RustLspAdapter);
1189 let language = language("rust", tree_sitter_rust::LANGUAGE.into());
1190 let grammar = language.grammar().unwrap();
1191 let theme = SyntaxTheme::new_test([
1192 ("type", Hsla::default()),
1193 ("keyword", Hsla::default()),
1194 ("function", Hsla::default()),
1195 ("property", Hsla::default()),
1196 ]);
1197
1198 language.set_theme(&theme);
1199
1200 let highlight_function = grammar.highlight_id_for_name("function").unwrap();
1201 let highlight_type = grammar.highlight_id_for_name("type").unwrap();
1202 let highlight_keyword = grammar.highlight_id_for_name("keyword").unwrap();
1203
1204 assert_eq!(
1205 adapter
1206 .label_for_symbol("hello", lsp::SymbolKind::FUNCTION, &language)
1207 .await,
1208 Some(CodeLabel {
1209 text: "fn hello".to_string(),
1210 filter_range: 3..8,
1211 runs: vec![(0..2, highlight_keyword), (3..8, highlight_function)],
1212 })
1213 );
1214
1215 assert_eq!(
1216 adapter
1217 .label_for_symbol("World", lsp::SymbolKind::TYPE_PARAMETER, &language)
1218 .await,
1219 Some(CodeLabel {
1220 text: "type World".to_string(),
1221 filter_range: 5..10,
1222 runs: vec![(0..4, highlight_keyword), (5..10, highlight_type)],
1223 })
1224 );
1225 }
1226
1227 #[gpui::test]
1228 async fn test_rust_autoindent(cx: &mut TestAppContext) {
1229 // cx.executor().set_block_on_ticks(usize::MAX..=usize::MAX);
1230 cx.update(|cx| {
1231 let test_settings = SettingsStore::test(cx);
1232 cx.set_global(test_settings);
1233 language::init(cx);
1234 cx.update_global::<SettingsStore, _>(|store, cx| {
1235 store.update_user_settings::<AllLanguageSettings>(cx, |s| {
1236 s.defaults.tab_size = NonZeroU32::new(2);
1237 });
1238 });
1239 });
1240
1241 let language = crate::language("rust", tree_sitter_rust::LANGUAGE.into());
1242
1243 cx.new(|cx| {
1244 let mut buffer = Buffer::local("", cx).with_language(language, cx);
1245
1246 // indent between braces
1247 buffer.set_text("fn a() {}", cx);
1248 let ix = buffer.len() - 1;
1249 buffer.edit([(ix..ix, "\n\n")], Some(AutoindentMode::EachLine), cx);
1250 assert_eq!(buffer.text(), "fn a() {\n \n}");
1251
1252 // indent between braces, even after empty lines
1253 buffer.set_text("fn a() {\n\n\n}", cx);
1254 let ix = buffer.len() - 2;
1255 buffer.edit([(ix..ix, "\n")], Some(AutoindentMode::EachLine), cx);
1256 assert_eq!(buffer.text(), "fn a() {\n\n\n \n}");
1257
1258 // indent a line that continues a field expression
1259 buffer.set_text("fn a() {\n \n}", cx);
1260 let ix = buffer.len() - 2;
1261 buffer.edit([(ix..ix, "b\n.c")], Some(AutoindentMode::EachLine), cx);
1262 assert_eq!(buffer.text(), "fn a() {\n b\n .c\n}");
1263
1264 // indent further lines that continue the field expression, even after empty lines
1265 let ix = buffer.len() - 2;
1266 buffer.edit([(ix..ix, "\n\n.d")], Some(AutoindentMode::EachLine), cx);
1267 assert_eq!(buffer.text(), "fn a() {\n b\n .c\n \n .d\n}");
1268
1269 // dedent the line after the field expression
1270 let ix = buffer.len() - 2;
1271 buffer.edit([(ix..ix, ";\ne")], Some(AutoindentMode::EachLine), cx);
1272 assert_eq!(
1273 buffer.text(),
1274 "fn a() {\n b\n .c\n \n .d;\n e\n}"
1275 );
1276
1277 // indent inside a struct within a call
1278 buffer.set_text("const a: B = c(D {});", cx);
1279 let ix = buffer.len() - 3;
1280 buffer.edit([(ix..ix, "\n\n")], Some(AutoindentMode::EachLine), cx);
1281 assert_eq!(buffer.text(), "const a: B = c(D {\n \n});");
1282
1283 // indent further inside a nested call
1284 let ix = buffer.len() - 4;
1285 buffer.edit([(ix..ix, "e: f(\n\n)")], Some(AutoindentMode::EachLine), cx);
1286 assert_eq!(buffer.text(), "const a: B = c(D {\n e: f(\n \n )\n});");
1287
1288 // keep that indent after an empty line
1289 let ix = buffer.len() - 8;
1290 buffer.edit([(ix..ix, "\n")], Some(AutoindentMode::EachLine), cx);
1291 assert_eq!(
1292 buffer.text(),
1293 "const a: B = c(D {\n e: f(\n \n \n )\n});"
1294 );
1295
1296 buffer
1297 });
1298 }
1299
1300 #[test]
1301 fn test_package_name_from_pkgid() {
1302 for (input, expected) in [
1303 (
1304 "path+file:///absolute/path/to/project/zed/crates/zed#0.131.0",
1305 "zed",
1306 ),
1307 (
1308 "path+file:///absolute/path/to/project/custom-package#my-custom-package@0.1.0",
1309 "my-custom-package",
1310 ),
1311 ] {
1312 assert_eq!(package_name_from_pkgid(input), Some(expected));
1313 }
1314 }
1315
1316 #[test]
1317 fn test_target_info_from_metadata() {
1318 for (input, absolute_path, expected) in [
1319 (
1320 r#"{"packages":[{"id":"path+file:///absolute/path/to/project/zed/crates/zed#0.131.0","targets":[{"name":"zed","kind":["bin"],"src_path":"/path/to/zed/src/main.rs"}]}]}"#,
1321 "/path/to/zed/src/main.rs",
1322 Some(TargetInfo {
1323 package_name: "zed".into(),
1324 target_name: "zed".into(),
1325 required_features: Vec::new(),
1326 target_kind: TargetKind::Bin,
1327 }),
1328 ),
1329 (
1330 r#"{"packages":[{"id":"path+file:///path/to/custom-package#my-custom-package@0.1.0","targets":[{"name":"my-custom-bin","kind":["bin"],"src_path":"/path/to/custom-package/src/main.rs"}]}]}"#,
1331 "/path/to/custom-package/src/main.rs",
1332 Some(TargetInfo {
1333 package_name: "my-custom-package".into(),
1334 target_name: "my-custom-bin".into(),
1335 required_features: Vec::new(),
1336 target_kind: TargetKind::Bin,
1337 }),
1338 ),
1339 (
1340 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"}]}]}"#,
1341 "/path/to/custom-package/src/main.rs",
1342 Some(TargetInfo {
1343 package_name: "my-custom-package".into(),
1344 target_name: "my-custom-bin".into(),
1345 required_features: Vec::new(),
1346 target_kind: TargetKind::Example,
1347 }),
1348 ),
1349 (
1350 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":["foo","bar"]}]}]}"#,
1351 "/path/to/custom-package/src/main.rs",
1352 Some(TargetInfo {
1353 package_name: "my-custom-package".into(),
1354 target_name: "my-custom-bin".into(),
1355 required_features: vec!["foo".to_owned(), "bar".to_owned()],
1356 target_kind: TargetKind::Example,
1357 }),
1358 ),
1359 (
1360 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":[]}]}]}"#,
1361 "/path/to/custom-package/src/main.rs",
1362 Some(TargetInfo {
1363 package_name: "my-custom-package".into(),
1364 target_name: "my-custom-bin".into(),
1365 required_features: vec![],
1366 target_kind: TargetKind::Example,
1367 }),
1368 ),
1369 (
1370 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"}]}]}"#,
1371 "/path/to/custom-package/src/main.rs",
1372 None,
1373 ),
1374 ] {
1375 let metadata: CargoMetadata = serde_json::from_str(input).unwrap();
1376
1377 let absolute_path = Path::new(absolute_path);
1378
1379 assert_eq!(target_info_from_metadata(metadata, absolute_path), expected);
1380 }
1381 }
1382
1383 #[test]
1384 fn test_rust_test_fragment() {
1385 #[track_caller]
1386 fn check(
1387 variables: impl IntoIterator<Item = (VariableName, &'static str)>,
1388 path: &str,
1389 expected: &str,
1390 ) {
1391 let path = Path::new(path);
1392 let found = test_fragment(
1393 &TaskVariables::from_iter(variables.into_iter().map(|(k, v)| (k, v.to_owned()))),
1394 path,
1395 &path.file_stem().unwrap().to_str().unwrap(),
1396 );
1397 assert_eq!(expected, found);
1398 }
1399
1400 check([], "/project/src/lib.rs", "--lib");
1401 check([], "/project/src/foo/mod.rs", "foo");
1402 check(
1403 [
1404 (RUST_BIN_KIND_TASK_VARIABLE.clone(), "bin"),
1405 (RUST_BIN_NAME_TASK_VARIABLE, "x"),
1406 ],
1407 "/project/src/main.rs",
1408 "--bin=x",
1409 );
1410 check([], "/project/src/main.rs", "--");
1411 }
1412}