1 files changed, 204 insertions, 0 deletions

diff --git a/editors/code/src/run.ts b/editors/code/src/run.ts
new file mode 100644
index 000000000..2a7a429cf
--- /dev/null
+++ b/editors/code/src/run.ts
@@ -0,0 +1,204 @@
+import * as vscode from 'vscode';
+import * as lc from 'vscode-languageclient';
+import * as ra from './lsp_ext';
+
+import { Ctx, Cmd } from './ctx';
+import { startDebugSession, getDebugConfiguration } from './debug';
+
+const quickPickButtons = [{ iconPath: new vscode.ThemeIcon("save"), tooltip: "Save as a launch.json configurtation." }];
+
+export async function selectRunnable(ctx: Ctx, prevRunnable?: RunnableQuickPick, debuggeeOnly = false, showButtons: boolean = true): Promise<RunnableQuickPick | undefined> {
+    const editor = ctx.activeRustEditor;
+    const client = ctx.client;
+    if (!editor || !client) return;
+
+    const textDocument: lc.TextDocumentIdentifier = {
+        uri: editor.document.uri.toString(),
+    };
+
+    const runnables = await client.sendRequest(ra.runnables, {
+        textDocument,
+        position: client.code2ProtocolConverter.asPosition(
+            editor.selection.active,
+        ),
+    });
+    const items: RunnableQuickPick[] = [];
+    if (prevRunnable) {
+        items.push(prevRunnable);
+    }
+    for (const r of runnables) {
+        if (
+            prevRunnable &&
+            JSON.stringify(prevRunnable.runnable) === JSON.stringify(r)
+        ) {
+            continue;
+        }
+
+        if (debuggeeOnly && (r.label.startsWith('doctest') || r.label.startsWith('cargo'))) {
+            continue;
+        }
+        items.push(new RunnableQuickPick(r));
+    }
+
+    if (items.length === 0) {
+        // it is the debug case, run always has at least 'cargo check ...'
+        // see crates\rust-analyzer\src\main_loop\handlers.rs, handle_runnables
+        vscode.window.showErrorMessage("There's no debug target!");
+        return;
+    }
+
+    return await new Promise((resolve) => {
+        const disposables: vscode.Disposable[] = [];
+        const close = (result?: RunnableQuickPick) => {
+            resolve(result);
+            disposables.forEach(d => d.dispose());
+        };
+
+        const quickPick = vscode.window.createQuickPick<RunnableQuickPick>();
+        quickPick.items = items;
+        quickPick.title = "Select Runnable";
+        if (showButtons) {
+            quickPick.buttons = quickPickButtons;
+        }
+        disposables.push(
+            quickPick.onDidHide(() => close()),
+            quickPick.onDidAccept(() => close(quickPick.selectedItems[0])),
+            quickPick.onDidTriggerButton((_button) => {
+                (async () => await makeDebugConfig(ctx, quickPick.activeItems[0]))();
+                close();
+            }),
+            quickPick.onDidChangeActive((active) => {
+                if (showButtons && active.length > 0) {
+                    if (active[0].label.startsWith('cargo')) {
+                        // save button makes no sense for `cargo test` or `cargo check`
+                        quickPick.buttons = [];
+                    } else if (quickPick.buttons.length === 0) {
+                        quickPick.buttons = quickPickButtons;
+                    }
+                }
+            }),
+            quickPick
+        );
+        quickPick.show();
+    });
+}
+
+export function runSingle(ctx: Ctx): Cmd {
+    return async (runnable: ra.Runnable) => {
+        const editor = ctx.activeRustEditor;
+        if (!editor) return;
+
+        const task = createTask(runnable);
+        task.group = vscode.TaskGroup.Build;
+        task.presentationOptions = {
+            reveal: vscode.TaskRevealKind.Always,
+            panel: vscode.TaskPanelKind.Dedicated,
+            clear: true,
+        };
+
+        return vscode.tasks.executeTask(task);
+    };
+}
+
+export function debug(ctx: Ctx): Cmd {
+    let prevDebuggee: RunnableQuickPick | undefined;
+
+    return async () => {
+        const item = await selectRunnable(ctx, prevDebuggee, true);
+        if (!item) return;
+
+        item.detail = 'restart';
+        prevDebuggee = item;
+        return await startDebugSession(ctx, item.runnable);
+    };
+}
+
+export function debugSingle(ctx: Ctx): Cmd {
+    return async (config: ra.Runnable) => {
+        await startDebugSession(ctx, config);
+    };
+}
+
+async function makeDebugConfig(ctx: Ctx, item: RunnableQuickPick): Promise<void> {
+    const scope = ctx.activeRustEditor?.document.uri;
+    if (!scope) return;
+
+    const debugConfig = await getDebugConfiguration(ctx, item.runnable);
+    if (!debugConfig) return;
+
+    const wsLaunchSection = vscode.workspace.getConfiguration("launch", scope);
+    const configurations = wsLaunchSection.get<any[]>("configurations") || [];
+
+    const index = configurations.findIndex(c => c.name === debugConfig.name);
+    if (index !== -1) {
+        const answer = await vscode.window.showErrorMessage(`Launch configuration '${debugConfig.name}' already exists!`, 'Cancel', 'Update');
+        if (answer === "Cancel") return;
+
+        configurations[index] = debugConfig;
+    } else {
+        configurations.push(debugConfig);
+    }
+
+    await wsLaunchSection.update("configurations", configurations);
+}
+
+export function newDebugConfig(ctx: Ctx): Cmd {
+    return async () => {
+        const item = await selectRunnable(ctx, undefined, true, false);
+        if (!item) return;
+
+        await makeDebugConfig(ctx, item);
+    };
+}
+
+export class RunnableQuickPick implements vscode.QuickPickItem {
+    public label: string;
+    public description?: string | undefined;
+    public detail?: string | undefined;
+    public picked?: boolean | undefined;
+
+    constructor(public runnable: ra.Runnable) {
+        this.label = runnable.label;
+    }
+}
+
+interface CargoTaskDefinition extends vscode.TaskDefinition {
+    type: 'cargo';
+    label: string;
+    command: string;
+    args: string[];
+    env?: { [key: string]: string };
+}
+
+export function createTask(spec: ra.Runnable): vscode.Task {
+    const TASK_SOURCE = 'Rust';
+    const definition: CargoTaskDefinition = {
+        type: 'cargo',
+        label: spec.label,
+        command: spec.bin,
+        args: spec.extraArgs ? [...spec.args, '--', ...spec.extraArgs] : spec.args,
+        env: spec.env,
+    };
+
+    const execOption: vscode.ShellExecutionOptions = {
+        cwd: spec.cwd || '.',
+        env: definition.env,
+    };
+    const exec = new vscode.ShellExecution(
+        definition.command,
+        definition.args,
+        execOption,
+    );
+
+    const f = vscode.workspace.workspaceFolders![0];
+    const t = new vscode.Task(
+        definition,
+        f,
+        definition.label,
+        TASK_SOURCE,
+        exec,
+        ['$rustc'],
+    );
+    t.presentationOptions.clear = true;
+    return t;
+}