feat(cli): non-blocking "new version available" notice (24h-cached npm check, opt-out, CI-safe)

Author: Andy00L

DOCUMENTATION.md

@@ -432,6 +432,18 @@ These apply to every command:
 | `TESTSPRITE_API_URL`            | API endpoint — overrides the credentials file                                     |
 | `TESTSPRITE_PROFILE`            | Active profile (below `--profile`, above `default`)                               |
 | `TESTSPRITE_REQUEST_TIMEOUT_MS` | Per-request timeout in **milliseconds** (default `120000`, range `1000`–`600000`) |
+| `TESTSPRITE_NO_UPDATE_NOTIFIER` | Any non-empty value disables the once-per-24h "new version available" notice      |
+
+### Update notice
+
+Interactive runs print a one-line "new version available" notice on stderr when
+a newer release exists. To learn this, the CLI contacts the public npm registry
+(`registry.npmjs.org`) at most once per 24 hours; the request carries the
+package name only — never your API key, project data, or command line. The
+check is skipped in CI, when stderr is not a TTY, under `--output json` /
+`--dry-run`, and entirely when `TESTSPRITE_NO_UPDATE_NOTIFIER` is set. Any
+failure is silent: the notice can never break or delay a command. This is the
+only outbound call the CLI makes besides your configured API endpoint.
 
 ### Scopes
 

src/index.ts

@@ -14,6 +14,7 @@ import { ApiError, CLIError, RequestTimeoutError } from './lib/errors.js';
 import { Output, isOutputMode } from './lib/output.js';
 import { renderCommanderError, rephraseUnknownOption } from './lib/render-error.js';
 import { maybeEmitSkillNudge } from './lib/skill-nudge.js';
+import { maybeNotifyUpdate } from './lib/update-check.js';
 import { VERSION } from './version.js';
 
 const program = new Command();
@@ -128,14 +129,24 @@ program.hook('preAction', (_thisCommand, actionCommand) => {
     profile?: string;
     dryRun?: boolean;
   };
+  const commandPath = commandPathOf(actionCommand);
   maybeEmitSkillNudge({
-    commandPath: commandPathOf(actionCommand),
+    commandPath,
     output: isOutputMode(globals.output) ? globals.output : 'text',
     dryRun: globals.dryRun ?? false,
     profile: globals.profile ?? 'default',
     cwd: process.cwd(),
     env: process.env,
   });
+
+  // Best-effort update notice (see lib/update-check.ts): self-gates on the
+  // opt-out env, CI, TTY, and a 24h cache; the wiring adds the flag-level
+  // gates the lib cannot see. Skipped for `completion` (its stdout is eval'd
+  // by shells), under --output json, and under --dry-run. Deliberately not
+  // awaited: an advisory must never delay the real command.
+  if (globals.output !== 'json' && globals.dryRun !== true && commandPath !== 'completion') {
+    void maybeNotifyUpdate();
+  }
 });
 
 try {

src/lib/update-check.test.ts

@@ -0,0 +1,231 @@
+/**
+ * Unit tests for the update notice (issue #122). Every effect is injected:
+ * no real network, filesystem, clock, or TTY is touched.
+ */
+
+import { describe, expect, it, vi } from 'vitest';
+import { mkdtempSync, readFileSync, rmSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+import type { UpdateCheckDeps } from './update-check.js';
+import {
+  UPDATE_CHECK_OPT_OUT_ENV,
+  UPDATE_CHECK_TTL_MS,
+  compareSemver,
+  fetchLatestVersion,
+  maybeNotifyUpdate,
+  shouldCheckForUpdate,
+} from './update-check.js';
+
+/** In-memory fs + deterministic clock harness for the cache round-trip. */
+function makeHarness(overrides: UpdateCheckDeps = {}) {
+  const files = new Map<string, string>();
+  const stderrLines: string[] = [];
+  const deps: UpdateCheckDeps = {
+    env: {},
+    now: () => 1_000_000,
+    cachePath: '/fake/.testsprite/update-check.json',
+    readFile: path => {
+      const content = files.get(path);
+      if (content === undefined) throw new Error('ENOENT');
+      return content;
+    },
+    writeFile: (path, content) => {
+      files.set(path, content);
+    },
+    mkdir: () => undefined,
+    isTTY: true,
+    stderr: line => stderrLines.push(line),
+    currentVersion: '0.2.0',
+    fetchImpl: async () =>
+      new Response(JSON.stringify({ version: '0.2.0' }), {
+        status: 200,
+        headers: { 'content-type': 'application/json' },
+      }),
+    ...overrides,
+  };
+  return { deps, files, stderrLines };
+}
+
+describe('shouldCheckForUpdate gates', () => {
+  it('opt-out env set to any non-empty value disables (even "0")', () => {
+    const { deps } = makeHarness({ env: { [UPDATE_CHECK_OPT_OUT_ENV]: '0' } });
+    expect(shouldCheckForUpdate(deps)).toBe(false);
+  });
+
+  it('CI set disables; CI="false" re-enables', () => {
+    expect(shouldCheckForUpdate(makeHarness({ env: { CI: 'true' } }).deps)).toBe(false);
+    expect(shouldCheckForUpdate(makeHarness({ env: { CI: '' } }).deps)).toBe(false);
+    expect(shouldCheckForUpdate(makeHarness({ env: { CI: 'false' } }).deps)).toBe(true);
+  });
+
+  it('non-TTY stderr disables', () => {
+    expect(shouldCheckForUpdate(makeHarness({ isTTY: false }).deps)).toBe(false);
+  });
+
+  it('a fresh cache suppresses; a stale cache does not', () => {
+    const fresh = makeHarness();
+    fresh.files.set(
+      '/fake/.testsprite/update-check.json',
+      JSON.stringify({ lastCheckMs: 1_000_000 - UPDATE_CHECK_TTL_MS + 5_000 }),
+    );
+    expect(shouldCheckForUpdate(fresh.deps)).toBe(false);
+
+    const stale = makeHarness();
+    stale.files.set(
+      '/fake/.testsprite/update-check.json',
+      JSON.stringify({ lastCheckMs: 1_000_000 - UPDATE_CHECK_TTL_MS - 5_000 }),
+    );
+    expect(shouldCheckForUpdate(stale.deps)).toBe(true);
+  });
+
+  it('missing, corrupt, wrong-shape, or future-stamped caches count as stale', () => {
+    expect(shouldCheckForUpdate(makeHarness().deps)).toBe(true); // missing
+    const corrupt = makeHarness();
+    corrupt.files.set('/fake/.testsprite/update-check.json', '{not json');
+    expect(shouldCheckForUpdate(corrupt.deps)).toBe(true);
+    const wrongShape = makeHarness();
+    wrongShape.files.set('/fake/.testsprite/update-check.json', JSON.stringify({ nope: true }));
+    expect(shouldCheckForUpdate(wrongShape.deps)).toBe(true);
+    const future = makeHarness();
+    future.files.set(
+      '/fake/.testsprite/update-check.json',
+      JSON.stringify({ lastCheckMs: 9_999_999_999 }),
+    );
+    expect(shouldCheckForUpdate(future.deps)).toBe(true);
+  });
+});
+
+describe('fetchLatestVersion', () => {
+  it('returns the version from a valid registry body', async () => {
+    const { deps } = makeHarness({
+      fetchImpl: async () => new Response(JSON.stringify({ version: '1.2.3' }), { status: 200 }),
+    });
+    await expect(fetchLatestVersion(deps)).resolves.toBe('1.2.3');
+  });
+
+  it('returns undefined on non-2xx, thrown fetch, and wrong-shape body', async () => {
+    const notOk = makeHarness({ fetchImpl: async () => new Response('nope', { status: 500 }) });
+    await expect(fetchLatestVersion(notOk.deps)).resolves.toBeUndefined();
+
+    const throwing = makeHarness({
+      fetchImpl: async () => {
+        throw new TypeError('fetch failed');
+      },
+    });
+    await expect(fetchLatestVersion(throwing.deps)).resolves.toBeUndefined();
+
+    const wrongShape = makeHarness({
+      fetchImpl: async () => new Response(JSON.stringify({ notVersion: 1 }), { status: 200 }),
+    });
+    await expect(fetchLatestVersion(wrongShape.deps)).resolves.toBeUndefined();
+  });
+});
+
+describe('compareSemver', () => {
+  it('orders numerically and treats prerelease as older than its release', () => {
+    expect(compareSemver('0.2.0', '0.3.0')).toBe(-1);
+    expect(compareSemver('1.0.0', '0.9.9')).toBe(1);
+    expect(compareSemver('0.2.0', '0.2.0')).toBe(0);
+    expect(compareSemver('0.10.0', '0.9.0')).toBe(1); // numeric, not lexicographic
+    expect(compareSemver('1.0.0-rc.1', '1.0.0')).toBe(-1);
+    expect(compareSemver('1.0.0', '1.0.0-rc.1')).toBe(1);
+  });
+
+  it('unparseable input on either side compares as 0 (never a false notice)', () => {
+    expect(compareSemver('garbage', '1.0.0')).toBe(0);
+    expect(compareSemver('1.0.0', '')).toBe(0);
+  });
+});
+
+describe('maybeNotifyUpdate', () => {
+  it('prints exactly one stderr line naming both versions when newer, and stamps the cache', async () => {
+    const harness = makeHarness({
+      fetchImpl: async () => new Response(JSON.stringify({ version: '0.3.1' }), { status: 200 }),
+    });
+    await maybeNotifyUpdate(harness.deps);
+    expect(harness.stderrLines).toHaveLength(1);
+    expect(harness.stderrLines[0]).toContain('0.2.0 -> 0.3.1');
+    expect(harness.stderrLines[0]).toContain(UPDATE_CHECK_OPT_OUT_ENV);
+    const cache = JSON.parse(harness.files.get('/fake/.testsprite/update-check.json')!) as {
+      lastCheckMs: number;
+      latestKnown?: string;
+    };
+    expect(cache.lastCheckMs).toBe(1_000_000);
+    expect(cache.latestKnown).toBe('0.3.1');
+  });
+
+  it('stays silent on an equal or older registry version', async () => {
+    const equal = makeHarness();
+    await maybeNotifyUpdate(equal.deps);
+    expect(equal.stderrLines).toHaveLength(0);
+
+    const older = makeHarness({
+      fetchImpl: async () => new Response(JSON.stringify({ version: '0.1.9' }), { status: 200 }),
+    });
+    await maybeNotifyUpdate(older.deps);
+    expect(older.stderrLines).toHaveLength(0);
+  });
+
+  it('a failed probe stays silent but still stamps the cache (retry once per TTL)', async () => {
+    const harness = makeHarness({
+      fetchImpl: async () => {
+        throw new TypeError('fetch failed');
+      },
+    });
+    await maybeNotifyUpdate(harness.deps);
+    expect(harness.stderrLines).toHaveLength(0);
+    const cache = JSON.parse(harness.files.get('/fake/.testsprite/update-check.json')!) as {
+      lastCheckMs: number;
+      latestKnown?: string;
+    };
+    expect(cache.lastCheckMs).toBe(1_000_000);
+    expect(cache.latestKnown).toBeUndefined();
+  });
+
+  it('does nothing when a gate blocks (no fetch fired)', async () => {
+    const fetchImpl = vi.fn(async () => new Response('{}', { status: 200 }));
+    const harness = makeHarness({ env: { CI: '1' }, fetchImpl });
+    await maybeNotifyUpdate(harness.deps);
+    expect(fetchImpl).not.toHaveBeenCalled();
+    expect(harness.stderrLines).toHaveLength(0);
+  });
+
+  it('never rejects, even when every injected dependency throws', async () => {
+    const harness = makeHarness({
+      fetchImpl: async () => new Response(JSON.stringify({ version: '9.9.9' }), { status: 200 }),
+      writeFile: () => {
+        throw new Error('EROFS');
+      },
+      stderr: () => {
+        throw new Error('broken stderr sink');
+      },
+    });
+    await expect(maybeNotifyUpdate(harness.deps)).resolves.toBeUndefined();
+  });
+
+  it('uses the default fs readers/writers when none are injected (real cache round-trip)', async () => {
+    const dir = mkdtempSync(join(tmpdir(), 'update-check-'));
+    // Point cachePath at a not-yet-existing subdir so the default mkdir
+    // (recursive) and writeFile arrows both run, and the first read (file
+    // absent) exercises the default readFile arrow's ENOENT path.
+    const cachePath = join(dir, 'nested', 'update-check.json');
+    const stderrLines: string[] = [];
+    try {
+      await maybeNotifyUpdate({
+        env: {},
+        now: () => 1_000_000,
+        isTTY: true,
+        currentVersion: '0.0.1',
+        cachePath,
+        stderr: line => stderrLines.push(line),
+        fetchImpl: async () => new Response(JSON.stringify({ version: '9.9.9' }), { status: 200 }),
+      });
+      // Cache was persisted by the default writeFile through the default mkdir.
+      expect(JSON.parse(readFileSync(cachePath, 'utf8'))).toMatchObject({ latestKnown: '9.9.9' });
+      expect(stderrLines.join('\n')).toContain('0.0.1 -> 9.9.9');
+    } finally {
+      rmSync(dir, { recursive: true, force: true });
+    }
+  });
+});