Support 'runnables' options in the vs code extension

editors/code/package.json

@@ -651,6 +651,22 @@
                     ],
                     "default": "full",
                     "description": "The strategy to use when inserting new imports or merging imports."
+                },
+                "rust-analyzer.runnables.overrideCargo": {
+                    "type": [
+                        "null",
+                        "string"
+                    ],
+                    "default": null,
+                    "description": "Command to be executed instead of 'cargo' for runnables."
+                },
+                "rust-analyzer.runnables.cargoExtraArgs": {
+                    "type": "array",
+                    "items": {
+                        "type": "string"
+                    },
+                    "default": [],
+                    "description": "Additional arguments to be passed to cargo for runnables such as tests or binaries.\nFor example, it may be '--release'"
                 }
             }
         },

editors/code/src/lsp_ext.ts

@@ -69,8 +69,10 @@ export interface Runnable {
     args: {
         workspaceRoot?: string;
         cargoArgs: string[];
+        cargoExtraArgs: string[];
         executableArgs: string[];
         expectTest?: boolean;
+        overrideCargo?: string;
     };
 }
 export const runnables = new lc.RequestType<RunnablesParams, Runnable[], void>("experimental/runnables");

editors/code/src/run.ts

@@ -129,6 +129,7 @@ export async function createTask(runnable: ra.Runnable, config: Config): Promise
     }
 
     const args = [...runnable.args.cargoArgs]; // should be a copy!
+    args.push(...runnable.args.cargoExtraArgs); // Append user-specified cargo options.
     if (runnable.args.executableArgs.length > 0) {
         args.push('--', ...runnable.args.executableArgs);
     }
@@ -139,6 +140,7 @@ export async function createTask(runnable: ra.Runnable, config: Config): Promise
         args: args.slice(1),
         cwd: runnable.args.workspaceRoot || ".",
         env: prepareEnv(runnable, config.runnableEnv),
+        overrideCargo: runnable.args.overrideCargo,
     };
 
     const target = vscode.workspace.workspaceFolders![0]; // safe, see main activate()

editors/code/src/tasks.ts

@@ -13,6 +13,7 @@ export interface CargoTaskDefinition extends vscode.TaskDefinition {
     args?: string[];
     cwd?: string;
     env?: { [key: string]: string };
+    overrideCargo?: string;
 }
 
 class CargoTaskProvider implements vscode.TaskProvider {
@@ -98,7 +99,14 @@ export async function buildCargoTask(
     }
 
     if (!exec) {
-        exec = new vscode.ShellExecution(toolchain.cargoPath(), args, definition);
+        // Check whether we must use a user-defined substitute for cargo.
+        const cargoCommand = definition.overrideCargo ? definition.overrideCargo : toolchain.cargoPath();
+
+        // Prepare the whole command as one line. It is required if user has provided override command which contains spaces,
+        // for example "wrapper cargo". Without manual preparation the overridden command will be quoted and fail to execute.
+        const fullCommand = [cargoCommand, ...args].join(" ");
+
+        exec = new vscode.ShellExecution(fullCommand, definition);
     }
 
     return new vscode.Task(

editors/code/tests/unit/runnable_env.test.ts

@@ -9,7 +9,8 @@ function makeRunnable(label: string): ra.Runnable {
         kind: "cargo",
         args: {
             cargoArgs: [],
-            executableArgs: []
+            executableArgs: [],
+            cargoExtraArgs: []
         }
     };
 }