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::Fs;
12use project::lsp_store::rust_analyzer_ext::CARGO_DIAGNOSTICS_SOURCE_NAME;
13use project::project_settings::ProjectSettings;
14use regex::Regex;
15use serde_json::json;
16use settings::Settings as _;
17use smol::fs::{self};
18use std::fmt::Display;
19use std::{
20 any::Any,
21 borrow::Cow,
22 path::{Path, PathBuf},
23 sync::{Arc, LazyLock},
24};
25use task::{TaskTemplate, TaskTemplates, TaskVariables, VariableName};
26use util::archive::extract_zip;
27use util::merge_json_value_into;
28use util::{
29 ResultExt,
30 fs::{make_file_executable, remove_matching},
31 maybe,
32};
33
34use crate::language_settings::language_settings;
35
36pub struct RustLspAdapter;
37
38#[cfg(target_os = "macos")]
39impl RustLspAdapter {
40 const GITHUB_ASSET_KIND: AssetKind = AssetKind::Gz;
41 const ARCH_SERVER_NAME: &str = "apple-darwin";
42}
43
44#[cfg(target_os = "linux")]
45impl RustLspAdapter {
46 const GITHUB_ASSET_KIND: AssetKind = AssetKind::Gz;
47 const ARCH_SERVER_NAME: &str = "unknown-linux-gnu";
48}
49
50#[cfg(target_os = "freebsd")]
51impl RustLspAdapter {
52 const GITHUB_ASSET_KIND: AssetKind = AssetKind::Gz;
53 const ARCH_SERVER_NAME: &str = "unknown-freebsd";
54}
55
56#[cfg(target_os = "windows")]
57impl RustLspAdapter {
58 const GITHUB_ASSET_KIND: AssetKind = AssetKind::Zip;
59 const ARCH_SERVER_NAME: &str = "pc-windows-msvc";
60}
61
62const SERVER_NAME: LanguageServerName = LanguageServerName::new_static("rust-analyzer");
63
64impl RustLspAdapter {
65 fn build_asset_name() -> String {
66 let extension = match Self::GITHUB_ASSET_KIND {
67 AssetKind::TarGz => "tar.gz",
68 AssetKind::Gz => "gz",
69 AssetKind::Zip => "zip",
70 };
71
72 format!(
73 "{}-{}-{}.{}",
74 SERVER_NAME,
75 std::env::consts::ARCH,
76 Self::ARCH_SERVER_NAME,
77 extension
78 )
79 }
80}
81
82pub(crate) struct CargoManifestProvider;
83
84impl ManifestProvider for CargoManifestProvider {
85 fn name(&self) -> ManifestName {
86 SharedString::new_static("Cargo.toml").into()
87 }
88
89 fn search(
90 &self,
91 ManifestQuery {
92 path,
93 depth,
94 delegate,
95 }: ManifestQuery,
96 ) -> Option<Arc<Path>> {
97 let mut outermost_cargo_toml = None;
98 for path in path.ancestors().take(depth) {
99 let p = path.join("Cargo.toml");
100 if delegate.exists(&p, Some(false)) {
101 outermost_cargo_toml = Some(Arc::from(path));
102 }
103 }
104
105 outermost_cargo_toml
106 }
107}
108
109#[async_trait(?Send)]
110impl LspAdapter for RustLspAdapter {
111 fn name(&self) -> LanguageServerName {
112 SERVER_NAME.clone()
113 }
114
115 fn manifest_name(&self) -> Option<ManifestName> {
116 Some(SharedString::new_static("Cargo.toml").into())
117 }
118
119 async fn check_if_user_installed(
120 &self,
121 delegate: &dyn LspAdapterDelegate,
122 _: Arc<dyn LanguageToolchainStore>,
123 _: &AsyncApp,
124 ) -> Option<LanguageServerBinary> {
125 let path = delegate.which("rust-analyzer".as_ref()).await?;
126 let env = delegate.shell_env().await;
127
128 // It is surprisingly common for ~/.cargo/bin/rust-analyzer to be a symlink to
129 // /usr/bin/rust-analyzer that fails when you run it; so we need to test it.
130 log::info!("found rust-analyzer in PATH. trying to run `rust-analyzer --help`");
131 let result = delegate
132 .try_exec(LanguageServerBinary {
133 path: path.clone(),
134 arguments: vec!["--help".into()],
135 env: Some(env.clone()),
136 })
137 .await;
138 if let Err(err) = result {
139 log::debug!(
140 "failed to run rust-analyzer after detecting it in PATH: binary: {:?}: {}",
141 path,
142 err
143 );
144 return None;
145 }
146
147 Some(LanguageServerBinary {
148 path,
149 env: Some(env),
150 arguments: vec![],
151 })
152 }
153
154 async fn fetch_latest_server_version(
155 &self,
156 delegate: &dyn LspAdapterDelegate,
157 ) -> Result<Box<dyn 'static + Send + Any>> {
158 let release = latest_github_release(
159 "rust-lang/rust-analyzer",
160 true,
161 false,
162 delegate.http_client(),
163 )
164 .await?;
165 let asset_name = Self::build_asset_name();
166
167 let asset = release
168 .assets
169 .iter()
170 .find(|asset| asset.name == asset_name)
171 .with_context(|| format!("no asset found matching `{asset_name:?}`"))?;
172 Ok(Box::new(GitHubLspBinaryVersion {
173 name: release.tag_name,
174 url: asset.browser_download_url.clone(),
175 }))
176 }
177
178 async fn fetch_server_binary(
179 &self,
180 version: Box<dyn 'static + Send + Any>,
181 container_dir: PathBuf,
182 delegate: &dyn LspAdapterDelegate,
183 ) -> Result<LanguageServerBinary> {
184 let version = version.downcast::<GitHubLspBinaryVersion>().unwrap();
185 let destination_path = container_dir.join(format!("rust-analyzer-{}", version.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 if fs::metadata(&server_path).await.is_err() {
192 remove_matching(&container_dir, |entry| entry != destination_path).await;
193
194 let mut response = delegate
195 .http_client()
196 .get(&version.url, Default::default(), true)
197 .await
198 .with_context(|| format!("downloading release from {}", version.url))?;
199 match Self::GITHUB_ASSET_KIND {
200 AssetKind::TarGz => {
201 let decompressed_bytes = GzipDecoder::new(BufReader::new(response.body_mut()));
202 let archive = async_tar::Archive::new(decompressed_bytes);
203 archive.unpack(&destination_path).await.with_context(|| {
204 format!("extracting {} to {:?}", version.url, destination_path)
205 })?;
206 }
207 AssetKind::Gz => {
208 let mut decompressed_bytes =
209 GzipDecoder::new(BufReader::new(response.body_mut()));
210 let mut file =
211 fs::File::create(&destination_path).await.with_context(|| {
212 format!(
213 "creating a file {:?} for a download from {}",
214 destination_path, version.url,
215 )
216 })?;
217 futures::io::copy(&mut decompressed_bytes, &mut file)
218 .await
219 .with_context(|| {
220 format!("extracting {} to {:?}", version.url, destination_path)
221 })?;
222 }
223 AssetKind::Zip => {
224 extract_zip(&destination_path, response.body_mut())
225 .await
226 .with_context(|| {
227 format!("unzipping {} to {:?}", version.url, destination_path)
228 })?;
229 }
230 };
231
232 // todo("windows")
233 make_file_executable(&server_path).await?;
234 }
235
236 Ok(LanguageServerBinary {
237 path: server_path,
238 env: None,
239 arguments: Default::default(),
240 })
241 }
242
243 async fn cached_server_binary(
244 &self,
245 container_dir: PathBuf,
246 _: &dyn LspAdapterDelegate,
247 ) -> Option<LanguageServerBinary> {
248 get_cached_server_binary(container_dir).await
249 }
250
251 fn disk_based_diagnostic_sources(&self) -> Vec<String> {
252 vec![CARGO_DIAGNOSTICS_SOURCE_NAME.to_owned()]
253 }
254
255 fn disk_based_diagnostics_progress_token(&self) -> Option<String> {
256 Some("rust-analyzer/flycheck".into())
257 }
258
259 fn process_diagnostics(
260 &self,
261 params: &mut lsp::PublishDiagnosticsParams,
262 _: LanguageServerId,
263 _: Option<&'_ Buffer>,
264 ) {
265 static REGEX: LazyLock<Regex> =
266 LazyLock::new(|| Regex::new(r"(?m)`([^`]+)\n`$").expect("Failed to create REGEX"));
267
268 for diagnostic in &mut params.diagnostics {
269 for message in diagnostic
270 .related_information
271 .iter_mut()
272 .flatten()
273 .map(|info| &mut info.message)
274 .chain([&mut diagnostic.message])
275 {
276 if let Cow::Owned(sanitized) = REGEX.replace_all(message, "`$1`") {
277 *message = sanitized;
278 }
279 }
280 }
281 }
282
283 fn diagnostic_message_to_markdown(&self, message: &str) -> Option<String> {
284 static REGEX: LazyLock<Regex> =
285 LazyLock::new(|| Regex::new(r"(?m)\n *").expect("Failed to create REGEX"));
286 Some(REGEX.replace_all(message, "\n\n").to_string())
287 }
288
289 async fn label_for_completion(
290 &self,
291 completion: &lsp::CompletionItem,
292 language: &Arc<Language>,
293 ) -> Option<CodeLabel> {
294 let detail = completion
295 .label_details
296 .as_ref()
297 .and_then(|detail| detail.detail.as_ref())
298 .or(completion.detail.as_ref())
299 .map(|detail| detail.trim());
300 let function_signature = completion
301 .label_details
302 .as_ref()
303 .and_then(|detail| detail.description.as_deref())
304 .or(completion.detail.as_deref());
305 match (detail, completion.kind) {
306 (Some(detail), Some(lsp::CompletionItemKind::FIELD)) => {
307 let name = &completion.label;
308 let text = format!("{name}: {detail}");
309 let prefix = "struct S { ";
310 let source = Rope::from(format!("{prefix}{text} }}"));
311 let runs =
312 language.highlight_text(&source, prefix.len()..prefix.len() + text.len());
313 return Some(CodeLabel {
314 text,
315 runs,
316 filter_range: 0..name.len(),
317 });
318 }
319 (
320 Some(detail),
321 Some(lsp::CompletionItemKind::CONSTANT | lsp::CompletionItemKind::VARIABLE),
322 ) if completion.insert_text_format != Some(lsp::InsertTextFormat::SNIPPET) => {
323 let name = &completion.label;
324 let text = format!(
325 "{}: {}",
326 name,
327 completion.detail.as_deref().unwrap_or(detail)
328 );
329 let prefix = "let ";
330 let source = Rope::from(format!("{prefix}{text} = ();"));
331 let runs =
332 language.highlight_text(&source, prefix.len()..prefix.len() + text.len());
333 return Some(CodeLabel {
334 text,
335 runs,
336 filter_range: 0..name.len(),
337 });
338 }
339 (
340 Some(detail),
341 Some(lsp::CompletionItemKind::FUNCTION | lsp::CompletionItemKind::METHOD),
342 ) => {
343 static REGEX: LazyLock<Regex> = LazyLock::new(|| Regex::new("\\(…?\\)").unwrap());
344 const FUNCTION_PREFIXES: [&str; 6] = [
345 "async fn",
346 "async unsafe fn",
347 "const fn",
348 "const unsafe fn",
349 "unsafe fn",
350 "fn",
351 ];
352 // Is it function `async`?
353 let fn_keyword = FUNCTION_PREFIXES.iter().find_map(|prefix| {
354 function_signature.as_ref().and_then(|signature| {
355 signature
356 .strip_prefix(*prefix)
357 .map(|suffix| (*prefix, suffix))
358 })
359 });
360 // fn keyword should be followed by opening parenthesis.
361 if let Some((prefix, suffix)) = fn_keyword {
362 let mut text = REGEX.replace(&completion.label, suffix).to_string();
363 let source = Rope::from(format!("{prefix} {text} {{}}"));
364 let run_start = prefix.len() + 1;
365 let runs = language.highlight_text(&source, run_start..run_start + text.len());
366 if detail.starts_with("(") {
367 text.push(' ');
368 text.push_str(&detail);
369 }
370
371 return Some(CodeLabel {
372 filter_range: 0..completion.label.find('(').unwrap_or(text.len()),
373 text,
374 runs,
375 });
376 } else if completion
377 .detail
378 .as_ref()
379 .map_or(false, |detail| detail.starts_with("macro_rules! "))
380 {
381 let source = Rope::from(completion.label.as_str());
382 let runs = language.highlight_text(&source, 0..completion.label.len());
383
384 return Some(CodeLabel {
385 filter_range: 0..completion.label.len(),
386 text: completion.label.clone(),
387 runs,
388 });
389 }
390 }
391 (_, Some(kind)) => {
392 let highlight_name = match kind {
393 lsp::CompletionItemKind::STRUCT
394 | lsp::CompletionItemKind::INTERFACE
395 | lsp::CompletionItemKind::ENUM => Some("type"),
396 lsp::CompletionItemKind::ENUM_MEMBER => Some("variant"),
397 lsp::CompletionItemKind::KEYWORD => Some("keyword"),
398 lsp::CompletionItemKind::VALUE | lsp::CompletionItemKind::CONSTANT => {
399 Some("constant")
400 }
401 _ => None,
402 };
403
404 let mut label = completion.label.clone();
405 if let Some(detail) = detail.filter(|detail| detail.starts_with("(")) {
406 label.push(' ');
407 label.push_str(detail);
408 }
409 let mut label = CodeLabel::plain(label, None);
410 if let Some(highlight_name) = highlight_name {
411 let highlight_id = language.grammar()?.highlight_id_for_name(highlight_name)?;
412 label.runs.push((
413 0..label.text.rfind('(').unwrap_or(completion.label.len()),
414 highlight_id,
415 ));
416 }
417
418 return Some(label);
419 }
420 _ => {}
421 }
422 None
423 }
424
425 async fn label_for_symbol(
426 &self,
427 name: &str,
428 kind: lsp::SymbolKind,
429 language: &Arc<Language>,
430 ) -> Option<CodeLabel> {
431 let (text, filter_range, display_range) = match kind {
432 lsp::SymbolKind::METHOD | lsp::SymbolKind::FUNCTION => {
433 let text = format!("fn {} () {{}}", name);
434 let filter_range = 3..3 + name.len();
435 let display_range = 0..filter_range.end;
436 (text, filter_range, display_range)
437 }
438 lsp::SymbolKind::STRUCT => {
439 let text = format!("struct {} {{}}", name);
440 let filter_range = 7..7 + name.len();
441 let display_range = 0..filter_range.end;
442 (text, filter_range, display_range)
443 }
444 lsp::SymbolKind::ENUM => {
445 let text = format!("enum {} {{}}", name);
446 let filter_range = 5..5 + name.len();
447 let display_range = 0..filter_range.end;
448 (text, filter_range, display_range)
449 }
450 lsp::SymbolKind::INTERFACE => {
451 let text = format!("trait {} {{}}", name);
452 let filter_range = 6..6 + name.len();
453 let display_range = 0..filter_range.end;
454 (text, filter_range, display_range)
455 }
456 lsp::SymbolKind::CONSTANT => {
457 let text = format!("const {}: () = ();", name);
458 let filter_range = 6..6 + name.len();
459 let display_range = 0..filter_range.end;
460 (text, filter_range, display_range)
461 }
462 lsp::SymbolKind::MODULE => {
463 let text = format!("mod {} {{}}", name);
464 let filter_range = 4..4 + name.len();
465 let display_range = 0..filter_range.end;
466 (text, filter_range, display_range)
467 }
468 lsp::SymbolKind::TYPE_PARAMETER => {
469 let text = format!("type {} {{}}", name);
470 let filter_range = 5..5 + name.len();
471 let display_range = 0..filter_range.end;
472 (text, filter_range, display_range)
473 }
474 _ => return None,
475 };
476
477 Some(CodeLabel {
478 runs: language.highlight_text(&text.as_str().into(), display_range.clone()),
479 text: text[display_range].to_string(),
480 filter_range,
481 })
482 }
483
484 fn prepare_initialize_params(
485 &self,
486 mut original: InitializeParams,
487 cx: &App,
488 ) -> Result<InitializeParams> {
489 let enable_lsp_tasks = ProjectSettings::get_global(cx)
490 .lsp
491 .get(&SERVER_NAME)
492 .map_or(false, |s| s.enable_lsp_tasks);
493 if enable_lsp_tasks {
494 let experimental = json!({
495 "runnables": {
496 "kinds": [ "cargo", "shell" ],
497 },
498 });
499 if let Some(original_experimental) = &mut original.capabilities.experimental {
500 merge_json_value_into(experimental, original_experimental);
501 } else {
502 original.capabilities.experimental = Some(experimental);
503 }
504 }
505
506 let cargo_diagnostics_fetched_separately = ProjectSettings::get_global(cx)
507 .diagnostics
508 .fetch_cargo_diagnostics();
509 if cargo_diagnostics_fetched_separately {
510 let disable_check_on_save = json!({
511 "checkOnSave": false,
512 });
513 if let Some(initialization_options) = &mut original.initialization_options {
514 merge_json_value_into(disable_check_on_save, initialization_options);
515 } else {
516 original.initialization_options = Some(disable_check_on_save);
517 }
518 }
519
520 Ok(original)
521 }
522}
523
524pub(crate) struct RustContextProvider;
525
526const RUST_PACKAGE_TASK_VARIABLE: VariableName =
527 VariableName::Custom(Cow::Borrowed("RUST_PACKAGE"));
528
529/// The bin name corresponding to the current file in Cargo.toml
530const RUST_BIN_NAME_TASK_VARIABLE: VariableName =
531 VariableName::Custom(Cow::Borrowed("RUST_BIN_NAME"));
532
533/// The bin kind (bin/example) corresponding to the current file in Cargo.toml
534const RUST_BIN_KIND_TASK_VARIABLE: VariableName =
535 VariableName::Custom(Cow::Borrowed("RUST_BIN_KIND"));
536
537/// The flag to list required features for executing a bin, if any
538const RUST_BIN_REQUIRED_FEATURES_FLAG_TASK_VARIABLE: VariableName =
539 VariableName::Custom(Cow::Borrowed("RUST_BIN_REQUIRED_FEATURES_FLAG"));
540
541/// The list of required features for executing a bin, if any
542const RUST_BIN_REQUIRED_FEATURES_TASK_VARIABLE: VariableName =
543 VariableName::Custom(Cow::Borrowed("RUST_BIN_REQUIRED_FEATURES"));
544
545const RUST_TEST_FRAGMENT_TASK_VARIABLE: VariableName =
546 VariableName::Custom(Cow::Borrowed("RUST_TEST_FRAGMENT"));
547
548const RUST_DOC_TEST_NAME_TASK_VARIABLE: VariableName =
549 VariableName::Custom(Cow::Borrowed("RUST_DOC_TEST_NAME"));
550
551const RUST_TEST_NAME_TASK_VARIABLE: VariableName =
552 VariableName::Custom(Cow::Borrowed("RUST_TEST_NAME"));
553
554impl ContextProvider for RustContextProvider {
555 fn build_context(
556 &self,
557 task_variables: &TaskVariables,
558 location: ContextLocation<'_>,
559 project_env: Option<HashMap<String, String>>,
560 _: Arc<dyn LanguageToolchainStore>,
561 cx: &mut gpui::App,
562 ) -> Task<Result<TaskVariables>> {
563 let local_abs_path = location
564 .file_location
565 .buffer
566 .read(cx)
567 .file()
568 .and_then(|file| Some(file.as_local()?.abs_path(cx)));
569
570 let mut variables = TaskVariables::default();
571
572 if let (Some(path), Some(stem)) = (&local_abs_path, task_variables.get(&VariableName::Stem))
573 {
574 let fragment = test_fragment(&variables, &path, stem);
575 variables.insert(RUST_TEST_FRAGMENT_TASK_VARIABLE, fragment);
576 };
577 if let Some(test_name) =
578 task_variables.get(&VariableName::Custom(Cow::Borrowed("_test_name")))
579 {
580 variables.insert(RUST_TEST_NAME_TASK_VARIABLE, test_name.into());
581 }
582 if let Some(doc_test_name) =
583 task_variables.get(&VariableName::Custom(Cow::Borrowed("_doc_test_name")))
584 {
585 variables.insert(RUST_DOC_TEST_NAME_TASK_VARIABLE, doc_test_name.into());
586 }
587 cx.background_spawn(async move {
588 if let Some(path) = local_abs_path
589 .as_deref()
590 .and_then(|local_abs_path| local_abs_path.parent())
591 {
592 if let Some(package_name) =
593 human_readable_package_name(path, project_env.as_ref()).await
594 {
595 variables.insert(RUST_PACKAGE_TASK_VARIABLE.clone(), package_name);
596 }
597 }
598 if let Some(path) = local_abs_path.as_ref() {
599 if let Some(target) = target_info_from_abs_path(&path, project_env.as_ref()).await {
600 variables.extend(TaskVariables::from_iter([
601 (RUST_PACKAGE_TASK_VARIABLE.clone(), target.package_name),
602 (RUST_BIN_NAME_TASK_VARIABLE.clone(), target.target_name),
603 (
604 RUST_BIN_KIND_TASK_VARIABLE.clone(),
605 target.target_kind.to_string(),
606 ),
607 ]));
608 if target.required_features.is_empty() {
609 variables.insert(RUST_BIN_REQUIRED_FEATURES_FLAG_TASK_VARIABLE, "".into());
610 variables.insert(RUST_BIN_REQUIRED_FEATURES_TASK_VARIABLE, "".into());
611 } else {
612 variables.insert(
613 RUST_BIN_REQUIRED_FEATURES_FLAG_TASK_VARIABLE.clone(),
614 "--features".to_string(),
615 );
616 variables.insert(
617 RUST_BIN_REQUIRED_FEATURES_TASK_VARIABLE.clone(),
618 target.required_features.join(","),
619 );
620 }
621 }
622 }
623 Ok(variables)
624 })
625 }
626
627 fn associated_tasks(
628 &self,
629 _: Arc<dyn Fs>,
630 file: Option<Arc<dyn language::File>>,
631 cx: &App,
632 ) -> Task<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 Task::ready(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}