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import * as vscode from 'vscode';
import * as toolchain from "./toolchain";
// 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';
interface CargoTaskDefinition extends vscode.TaskDefinition {
command?: string;
args?: string[];
cwd?: string;
env?: { [key: string]: string };
}
class CargoTaskProvider implements vscode.TaskProvider {
private readonly target: vscode.WorkspaceFolder;
constructor(target: vscode.WorkspaceFolder) {
this.target = target;
}
provideTasks(): 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 [
{ 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;
});
}
resolveTask(task: vscode.Task): 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) {
const args = [definition.command].concat(definition.args ?? []);
return new vscode.Task(
definition,
task.name,
'rust',
new vscode.ShellExecution('cargo', args, definition),
);
}
return undefined;
}
}
export function activateTaskProvider(target: vscode.WorkspaceFolder): vscode.Disposable {
const provider = new CargoTaskProvider(target);
return vscode.tasks.registerTaskProvider(TASK_TYPE, provider);
}
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