1 files changed, 71 insertions, 40 deletions

diff --git a/editors/code/src/tasks.ts b/editors/code/src/tasks.ts
index 9748824df..14abbd5b7 100644
--- a/editors/code/src/tasks.ts
+++ b/editors/code/src/tasks.ts
@@ -1,11 +1,14 @@
 import * as vscode from 'vscode';
 import * as toolchain from "./toolchain";
+import { Config } from './config';
+import { log } from './util';
 
 // This ends up as the `type` key in tasks.json. RLS also uses `cargo` and
 // our configuration should be compatible with it so use the same key.
-const TASK_TYPE = 'cargo';
+export const TASK_TYPE = 'cargo';
+export const TASK_SOURCE = 'rust';
 
-interface CargoTaskDefinition extends vscode.TaskDefinition {
+export interface CargoTaskDefinition extends vscode.TaskDefinition {
     command?: string;
     args?: string[];
     cwd?: string;
@@ -14,73 +17,101 @@ interface CargoTaskDefinition extends vscode.TaskDefinition {
 
 class CargoTaskProvider implements vscode.TaskProvider {
     private readonly target: vscode.WorkspaceFolder;
+    private readonly config: Config;
 
-    constructor(target: vscode.WorkspaceFolder) {
+    constructor(target: vscode.WorkspaceFolder, config: Config) {
         this.target = target;
+        this.config = config;
     }
 
-    provideTasks(): vscode.Task[] {
+    async provideTasks(): Promise<vscode.Task[]> {
         // Detect Rust tasks. Currently we do not do any actual detection
         // of tasks (e.g. aliases in .cargo/config) and just return a fixed
         // set of tasks that always exist. These tasks cannot be removed in
         // tasks.json - only tweaked.
 
-        const cargoPath = toolchain.cargoPath();
-
-        return [
+        const defs = [
             { command: 'build', group: vscode.TaskGroup.Build },
             { command: 'check', group: vscode.TaskGroup.Build },
             { command: 'test', group: vscode.TaskGroup.Test },
             { command: 'clean', group: vscode.TaskGroup.Clean },
             { command: 'run', group: undefined },
-        ]
-            .map(({ command, group }) => {
-                const vscodeTask = new vscode.Task(
-                    // The contents of this object end up in the tasks.json entries.
-                    {
-                        type: TASK_TYPE,
-                        command,
-                    },
-                    // The scope of the task - workspace or specific folder (global
-                    // is not supported).
-                    this.target,
-                    // The task name, and task source. These are shown in the UI as
-                    // `${source}: ${name}`, e.g. `rust: cargo build`.
-                    `cargo ${command}`,
-                    'rust',
-                    // What to do when this command is executed.
-                    new vscode.ShellExecution(cargoPath, [command]),
-                    // Problem matchers.
-                    ['$rustc'],
-                );
-                vscodeTask.group = group;
-                return vscodeTask;
-            });
+        ];
+
+        const tasks: vscode.Task[] = [];
+        for (const def of defs) {
+            const vscodeTask = await buildCargoTask(this.target, { type: TASK_TYPE, command: def.command }, `cargo ${def.command}`, [def.command], this.config.cargoRunner);
+            vscodeTask.group = def.group;
+            tasks.push(vscodeTask);
+        }
+
+        return tasks;
     }
 
-    resolveTask(task: vscode.Task): vscode.Task | undefined {
+    async resolveTask(task: vscode.Task): Promise<vscode.Task | undefined> {
         // VSCode calls this for every cargo task in the user's tasks.json,
         // we need to inform VSCode how to execute that command by creating
         // a ShellExecution for it.
 
         const definition = task.definition as CargoTaskDefinition;
 
-        if (definition.type === 'cargo' && definition.command) {
+        if (definition.type === TASK_TYPE && definition.command) {
             const args = [definition.command].concat(definition.args ?? []);
 
-            return new vscode.Task(
-                definition,
-                task.name,
-                'rust',
-                new vscode.ShellExecution('cargo', args, definition),
-            );
+            return await buildCargoTask(this.target, definition, task.name, args, this.config.cargoRunner);
         }
 
         return undefined;
     }
 }
 
-export function activateTaskProvider(target: vscode.WorkspaceFolder): vscode.Disposable {
-    const provider = new CargoTaskProvider(target);
+export async function buildCargoTask(
+    target: vscode.WorkspaceFolder,
+    definition: CargoTaskDefinition,
+    name: string,
+    args: string[],
+    customRunner?: string,
+    throwOnError: boolean = false
+): Promise<vscode.Task> {
+
+    let exec: vscode.ShellExecution | undefined = undefined;
+
+    if (customRunner) {
+        const runnerCommand = `${customRunner}.buildShellExecution`;
+        try {
+            const runnerArgs = { kind: TASK_TYPE, args, cwd: definition.cwd, env: definition.env };
+            const customExec = await vscode.commands.executeCommand(runnerCommand, runnerArgs);
+            if (customExec) {
+                if (customExec instanceof vscode.ShellExecution) {
+                    exec = customExec;
+                } else {
+                    log.debug("Invalid cargo ShellExecution", customExec);
+                    throw "Invalid cargo ShellExecution.";
+                }
+            }
+            // fallback to default processing
+
+        } catch (e) {
+            if (throwOnError) throw `Cargo runner '${customRunner}' failed! ${e}`;
+            // fallback to default processing
+        }
+    }
+
+    if (!exec) {
+        exec = new vscode.ShellExecution(toolchain.cargoPath(), args, definition);
+    }
+
+    return new vscode.Task(
+        definition,
+        target,
+        name,
+        TASK_SOURCE,
+        exec,
+        ['$rustc']
+    );
+}
+
+export function activateTaskProvider(target: vscode.WorkspaceFolder, config: Config): vscode.Disposable {
+    const provider = new CargoTaskProvider(target, config);
     return vscode.tasks.registerTaskProvider(TASK_TYPE, provider);
 }