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feat(FN-4623): complete Step 1 — add worktrunk CLI helper and mappings

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Fusion-Task-Id: FN-4623
Fusion-Task-Lineage: 58122853-cab7-4102-9649-4ceda4c5959e
This commit is contained in:
Fusion (runfusion.ai)
2026-05-15 19:03:59 -07:00
committed by gsxdsm
parent 9ac503fc0f
commit 35279a2517
2 changed files with 113 additions and 31 deletions
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58
packages/engine/src/__tests__/worktree-backend.test.ts
View File

@@ -6,19 +6,25 @@ import {
resolveWorktreeBackend,
} from "../worktree-backend.js";
const { execMock } = vi.hoisted(() => {
const { execMock, execFileMock, accessMock } = vi.hoisted(() => {
const mock = vi.fn();
const fileMock = vi.fn();
(mock as any)[Symbol.for("nodejs.util.promisify.custom")] = mock;
return { execMock: mock };
(fileMock as any)[Symbol.for("nodejs.util.promisify.custom")] = fileMock;
return { execMock: mock, execFileMock: fileMock, accessMock: vi.fn() };
});
vi.mock("node:child_process", () => ({ exec: execMock }));
vi.mock("node:child_process", () => ({ exec: execMock, execFile: execFileMock }));
vi.mock("node:fs/promises", () => ({ access: accessMock }));
vi.mock("../branch-conflicts.js", () => ({
inspectBranchConflict: vi.fn().mockResolvedValue({ kind: "stale" }),
}));
beforeEach(() => {
execMock.mockReset();
execFileMock.mockReset();
accessMock.mockReset();
accessMock.mockResolvedValue(undefined);
});
describe("NativeWorktreeBackend", () => {
@@ -129,7 +135,7 @@ describe("WorktrunkWorktreeBackend", () => {
});
it("throws operation failed with stderr/exitCode", async () => {
execMock.mockRejectedValue({ stderr: "bad news", status: 7 });
execFileMock.mockRejectedValue({ stderr: "bad news", status: 7 });
const backend = new WorktrunkWorktreeBackend({ binaryPath: "worktrunk" });
await expect(
@@ -143,7 +149,7 @@ describe("WorktrunkWorktreeBackend", () => {
});
it("invokes create mapping with timeout/maxBuffer and cwd", async () => {
execMock.mockResolvedValue({ stdout: "", stderr: "" });
execFileMock.mockResolvedValue({ stdout: "", stderr: "" });
const backend = new WorktrunkWorktreeBackend({ binaryPath: "worktrunk" });
await backend.create({
@@ -154,14 +160,15 @@ describe("WorktrunkWorktreeBackend", () => {
taskId: "FN-1",
});
expect(execMock).toHaveBeenCalledWith(
'"worktrunk" "switch" "--create" "fusion/fn-1" "main"',
expect(execFileMock).toHaveBeenCalledWith(
"worktrunk",
["switch", "--create", "fusion/fn-1", "main"],
expect.objectContaining({ cwd: "/repo", timeout: 120000, maxBuffer: 10485760 }),
);
});
it("invokes remove mapping", async () => {
execMock.mockResolvedValue({ stdout: "", stderr: "" });
execFileMock.mockResolvedValue({ stdout: "", stderr: "" });
const backend = new WorktrunkWorktreeBackend({ binaryPath: "worktrunk" });
await backend.remove({
@@ -170,12 +177,41 @@ describe("WorktrunkWorktreeBackend", () => {
branch: "fusion/fn-1",
});
expect(execMock).toHaveBeenCalledWith(
'"worktrunk" "remove" "fusion/fn-1"',
expect.objectContaining({ cwd: "/repo", timeout: 120000, maxBuffer: 10485760 }),
expect(execFileMock).toHaveBeenCalledWith(
"worktrunk",
["remove", "fusion/fn-1"],
expect.objectContaining({ cwd: "/repo", timeout: 60000, maxBuffer: 10485760 }),
);
});
it("maps ENOENT to worktrunk_binary_missing", async () => {
execFileMock.mockRejectedValue({ code: "ENOENT", stderr: "not found" });
const backend = new WorktrunkWorktreeBackend({ binaryPath: "worktrunk" });
await expect(
backend.create({
rootDir: "/repo",
worktreePath: "/repo/.worktrees/fn-1",
branch: "fusion/fn-1",
taskId: "FN-1",
}),
).rejects.toMatchObject({ code: "worktrunk_binary_missing" });
});
it("maps SIGTERM timeout to worktrunk_timeout", async () => {
execFileMock.mockRejectedValue({ signal: "SIGTERM", stderr: "timed out" });
const backend = new WorktrunkWorktreeBackend({ binaryPath: "worktrunk" });
await expect(
backend.create({
rootDir: "/repo",
worktreePath: "/repo/.worktrees/fn-1",
branch: "fusion/fn-1",
taskId: "FN-1",
}),
).rejects.toMatchObject({ code: "worktrunk_timeout" });
});
it("throws unsupported operation for sync/prune", async () => {
const backend = new WorktrunkWorktreeBackend({ binaryPath: "worktrunk" });

86
packages/engine/src/worktree-backend.ts
View File

@@ -1,15 +1,32 @@
import { exec } from "node:child_process";
import { exec, execFile } from "node:child_process";
import { access } from "node:fs/promises";
import { promisify } from "node:util";
import type { Settings } from "@fusion/core";
import { inspectBranchConflict } from "./branch-conflicts.js";
import { formatError } from "./logger.js";
const execAsync = promisify(exec);
const execFileAsync = promisify(execFile);
const NATIVE_TIMEOUT_MS = 120_000;
const WORKTRUNK_TIMEOUT_MS = 120_000;
const REMOVE_TIMEOUT_MS = 60_000;
const MAX_BUFFER = 10 * 1024 * 1024;
/**
* worktrunk CLI mapping (verified 2026-05-15 from README + worktrunk.dev docs):
* - create -> `wt switch --create <branch> [--base <startPoint>]`
* - remove -> `wt remove <branch> --foreground`
* - sync -> no dedicated `wt sync/rebase` primitive; fallback to git fetch+rebase
* - prune -> no dedicated `wt prune` primitive; backend-owned prune implementation
* - layout -> no dedicated path-query command; derive from worktrunk template/config
*/
const WORKTRUNK_TIMEOUTS_MS = {
create: 120_000,
sync: 180_000,
prune: 60_000,
remove: 60_000,
layout: 5_000,
} as const;
export type WorktreeBackendKind = "native" | "worktrunk";
export type WorktreeOperation = "create" | "remove" | "sync" | "prune";
@@ -56,6 +73,8 @@ export interface WorktreeBackend {
export type WorktrunkOperationCode =
| "worktrunk_operation_failed"
| "worktrunk_binary_missing"
| "worktrunk_timeout"
| "worktrunk_sync_conflict"
| "worktrunk_unsupported_operation";
export class WorktrunkOperationError extends Error {
@@ -194,6 +213,8 @@ export class NativeWorktreeBackend implements WorktreeBackend {
}
}
type WorktrunkOperation = keyof typeof WORKTRUNK_TIMEOUTS_MS;
export class WorktrunkWorktreeBackend implements WorktreeBackend {
readonly kind: WorktreeBackendKind = "worktrunk";
@@ -204,41 +225,66 @@ export class WorktrunkWorktreeBackend implements WorktreeBackend {
},
) {}
private getBinaryPath(operation: WorktreeOperation): string {
private async getBinaryPath(operation: WorktrunkOperation): Promise<string> {
const binaryPath = this.deps.binaryPath?.trim() ?? "";
if (!binaryPath) {
throw new WorktrunkOperationError({
operation,
operation: operation === "layout" ? "create" : operation,
code: "worktrunk_binary_missing",
stderr: "worktrunk binary not configured",
exitCode: null,
});
}
try {
await access(binaryPath);
} catch {
if (binaryPath.includes("/") || binaryPath.includes("\\")) {
throw new WorktrunkOperationError({
operation: operation === "layout" ? "create" : operation,
code: "worktrunk_binary_missing",
stderr: `worktrunk binary not found at path: ${binaryPath}`,
exitCode: null,
});
}
}
return binaryPath;
}
private async runWorktrunk(operation: WorktreeOperation, rootDir: string, args: string[]): Promise<void> {
const binaryPath = this.getBinaryPath(operation);
const command = `${quoteShellArg(binaryPath)} ${args.map((arg) => quoteShellArg(arg)).join(" ")}`;
this.deps.logger?.log?.(`[worktree-backend] running worktrunk command: ${command}`);
private async runWorktrunk(
args: string[],
opts: { cwd: string; operation: WorktrunkOperation; signal?: AbortSignal },
): Promise<{ stdout: string; stderr: string }> {
const binaryPath = await this.getBinaryPath(opts.operation);
this.deps.logger?.log?.(`[worktree-backend] running worktrunk command: ${binaryPath} ${args.join(" ")}`);
try {
await execAsync(command, {
cwd: rootDir,
return await execFileAsync(binaryPath, args, {
cwd: opts.cwd,
encoding: "utf-8",
timeout: WORKTRUNK_TIMEOUT_MS,
timeout: WORKTRUNK_TIMEOUTS_MS[opts.operation],
maxBuffer: MAX_BUFFER,
signal: opts.signal,
});
} catch (error) {
const stderr = getErrorStderr(error) ?? String(error);
const signal =
error && typeof error === "object" && "signal" in error
? ((error as { signal?: unknown }).signal as string | null | undefined)
: undefined;
const syscallCode =
error && typeof error === "object" && "code" in error
? ((error as { code?: unknown }).code as string | number | undefined)
: undefined;
const exitCode = getErrorExitCode(error);
this.deps.logger?.warn?.(`[worktree-backend] worktrunk ${operation} failed: ${stderr}`);
throw new WorktrunkOperationError({
operation,
code: "worktrunk_operation_failed",
stderr,
exitCode,
});
const op = opts.operation === "layout" ? "create" : opts.operation;
let code: WorktrunkOperationCode = "worktrunk_operation_failed";
if (syscallCode === "ENOENT") {
code = "worktrunk_binary_missing";
} else if (signal === "SIGTERM") {
code = "worktrunk_timeout";
}
this.deps.logger?.warn?.(`[worktree-backend] worktrunk ${opts.operation} failed: ${stderr}`);
throw new WorktrunkOperationError({ operation: op, code, stderr, exitCode });
}
}
@@ -249,13 +295,13 @@ export class WorktrunkWorktreeBackend implements WorktreeBackend {
// worktree path resolution so callers can keep using `input.worktreePath`.
const args = ["switch", "--create", input.branch];
if (input.startPoint) args.push(input.startPoint);
await this.runWorktrunk("create", input.rootDir, args);
await this.runWorktrunk(args, { cwd: input.rootDir, operation: "create" });
return { path: input.worktreePath, branch: input.branch };
}
async remove(input: WorktreeRemoveInput): Promise<void> {
// worktrunk mapping: `wt remove <branch>` from repo root.
await this.runWorktrunk("remove", input.rootDir, ["remove", input.branch ?? input.worktreePath]);
await this.runWorktrunk(["remove", input.branch ?? input.worktreePath], { cwd: input.rootDir, operation: "remove" });
}
async sync(_input: WorktreeSyncInput): Promise<{ skipped: boolean }> {