feat: add debug code lens

Refs #3539

crates/rust-analyzer/src/cargo_target_spec.rs

@@ -19,50 +19,48 @@ impl CargoTargetSpec {
     pub(crate) fn runnable_args(
         spec: Option<CargoTargetSpec>,
         kind: &RunnableKind,
-    ) -> Result<Vec<String>> {
-        let mut res = Vec::new();
+    ) -> Result<(Vec<String>, Vec<String>)> {
+        let mut args = Vec::new();
+        let mut extra_args = Vec::new();
         match kind {
             RunnableKind::Test { test_id } => {
-                res.push("test".to_string());
+                args.push("test".to_string());
                 if let Some(spec) = spec {
-                    spec.push_to(&mut res);
+                    spec.push_to(&mut args);
                 }
-                res.push("--".to_string());
-                res.push(test_id.to_string());
+                extra_args.push(test_id.to_string());
                 if let TestId::Path(_) = test_id {
-                    res.push("--exact".to_string());
+                    extra_args.push("--exact".to_string());
                 }
-                res.push("--nocapture".to_string());
+                extra_args.push("--nocapture".to_string());
             }
             RunnableKind::TestMod { path } => {
-                res.push("test".to_string());
+                args.push("test".to_string());
                 if let Some(spec) = spec {
-                    spec.push_to(&mut res);
+                    spec.push_to(&mut args);
                 }
-                res.push("--".to_string());
-                res.push(path.to_string());
-                res.push("--nocapture".to_string());
+                extra_args.push(path.to_string());
+                extra_args.push("--nocapture".to_string());
             }
             RunnableKind::Bench { test_id } => {
-                res.push("bench".to_string());
+                args.push("bench".to_string());
                 if let Some(spec) = spec {
-                    spec.push_to(&mut res);
+                    spec.push_to(&mut args);
                 }
-                res.push("--".to_string());
-                res.push(test_id.to_string());
+                extra_args.push(test_id.to_string());
                 if let TestId::Path(_) = test_id {
-                    res.push("--exact".to_string());
+                    extra_args.push("--exact".to_string());
                 }
-                res.push("--nocapture".to_string());
+                extra_args.push("--nocapture".to_string());
             }
             RunnableKind::Bin => {
-                res.push("run".to_string());
+                args.push("run".to_string());
                 if let Some(spec) = spec {
-                    spec.push_to(&mut res);
+                    spec.push_to(&mut args);
                 }
             }
         }
-        Ok(res)
+        Ok((args, extra_args))
     }
 
     pub(crate) fn for_file(

crates/rust-analyzer/src/main_loop/handlers.rs

@@ -381,6 +381,7 @@ pub fn handle_runnables(
         label,
         bin: "cargo".to_string(),
         args: check_args,
+        extra_args: Vec::with_capacity(0),
         env: FxHashMap::default(),
         cwd: workspace_root.map(|root| root.to_string_lossy().to_string()),
     });
@@ -795,17 +796,29 @@ pub fn handle_code_lens(
         }
         .to_string();
         let r = to_lsp_runnable(&world, file_id, runnable)?;
+        let range = r.range;
+        let arguments = vec![to_value(r).unwrap()];
         let lens = CodeLens {
-            range: r.range,
+            range: range.clone(),
             command: Some(Command {
                 title,
                 command: "rust-analyzer.runSingle".into(),
-                arguments: Some(vec![to_value(r).unwrap()]),
+                arguments: Some(arguments.clone()),
+            }),
+            data: None,
+        };
+        let debug_lens = CodeLens {
+            range,
+            command: Some(Command {
+                title: "Debug".into(),
+                command: "rust-analyzer.debugSingle".into(),
+                arguments: Some(arguments.clone()),
             }),
             data: None,
         };
 
         lenses.push(lens);
+        lenses.push(debug_lens);
     }
 
     // Handle impls
@@ -952,7 +965,7 @@ fn to_lsp_runnable(
     runnable: Runnable,
 ) -> Result<req::Runnable> {
     let spec = CargoTargetSpec::for_file(world, file_id)?;
-    let args = CargoTargetSpec::runnable_args(spec, &runnable.kind)?;
+    let (args, extra_args) = CargoTargetSpec::runnable_args(spec, &runnable.kind)?;
     let line_index = world.analysis().file_line_index(file_id)?;
     let label = match &runnable.kind {
         RunnableKind::Test { test_id } => format!("test {}", test_id),
@@ -965,6 +978,7 @@ fn to_lsp_runnable(
         label,
         bin: "cargo".to_string(),
         args,
+        extra_args,
         env: {
             let mut m = FxHashMap::default();
             m.insert("RUST_BACKTRACE".to_string(), "short".to_string());
@@ -973,6 +987,7 @@ fn to_lsp_runnable(
         cwd: world.workspace_root_for(file_id).map(|root| root.to_string_lossy().to_string()),
     })
 }
+
 fn highlight(world: &WorldSnapshot, file_id: FileId) -> Result<Vec<Decoration>> {
     let line_index = world.analysis().file_line_index(file_id)?;
     let res = world

crates/rust-analyzer/src/req.rs

@@ -169,6 +169,7 @@ pub struct Runnable {
     pub label: String,
     pub bin: String,
     pub args: Vec<String>,
+    pub extra_args: Vec<String>,
     pub env: FxHashMap<String, String>,
     pub cwd: Option<String>,
 }