fix(cli): replace the headless log handler

src/apps/cli/main.log-handler.unit.spec.ts

@@ -0,0 +1,55 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { mkdtemp, rm } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+
+const mocks = vi.hoisted(() => ({
+    setLogHandler: vi.fn(),
+}));
+
+vi.mock("./services/NodeServiceHub", () => ({
+    NodeServiceContext: class {},
+    NodeServiceHub: class {
+        API = {
+            addLog: {
+                setHandler: mocks.setLogHandler,
+            },
+        };
+    },
+}));
+
+import { main } from "./main";
+
+function createStandardIoMock() {
+    return {
+        readStdin: vi.fn(async () => ""),
+        prompt: vi.fn(async () => ""),
+        writeStdout: vi.fn(),
+        writeStderr: vi.fn(),
+    };
+}
+
+describe("CLI log handler", () => {
+    const originalArgv = process.argv.slice();
+    let databasePath: string;
+
+    beforeEach(async () => {
+        databasePath = await mkdtemp(join(tmpdir(), "livesync-cli-log-handler-"));
+        mocks.setLogHandler.mockReset();
+        mocks.setLogHandler.mockImplementation(() => {
+            throw new Error("__LOG_HANDLER_CONFIGURED__");
+        });
+    });
+
+    afterEach(async () => {
+        process.argv = originalArgv.slice();
+        await rm(databasePath, { recursive: true, force: true });
+    });
+
+    it("replaces the default Headless API log handler", async () => {
+        process.argv = ["node", "livesync-cli", databasePath, "remote-ls"];
+
+        await expect(main(createStandardIoMock())).rejects.toThrow("__LOG_HANDLER_CONFIGURED__");
+        expect(mocks.setLogHandler).toHaveBeenCalledWith(expect.any(Function), true);
+    });
+});

src/apps/cli/main.ts

@@ -399,7 +399,7 @@ export async function main(
             if (!options.verbose) return;
         }
         writeStderrLine(standardIo, prefix, message);
-    });
+    }, true);
     // Prevent replication result from being processed automatically in non-daemon commands.
     // In daemon mode the default handler must run so changes are applied to the filesystem.
     if (options.command !== "daemon") {