Merge feature/dc-064-discover-adopt-fetcht: DC-077 nesting-guard silent no-op fix [glm-grade=B]

dashcaddy-api/__tests__/nesting-guard.test.js

@@ -0,0 +1,112 @@
+/**
+ * Nesting-guard tests — DC-077 (data/data recursive duplicate cleanup)
+ *
+ * The guard runs at app startup. Pre-fix, `src/config/paths.js` did NOT
+ * re-export `dataDir`, so `paths.dataDir` resolved to `undefined`. The
+ * outer try/catch swallowed the resulting `TypeError [ERR_INVALID_ARG_TYPE]`
+ * and the entire guard became a silent no-op — every startup logged
+ * `[nesting-guard] Skipped: The "path" argument must be of type string.
+ * Received undefined`. Post-fix, paths.js exports `dataDir` and the guard
+ * falls back to platform-paths directly if `paths.dataDir` is missing.
+ *
+ * Tests use jest.isolateModules() for clean module-cache isolation.
+ * jest.doMock is intentionally avoided — it persists across tests in a
+ * describe and is the root cause of subtle flakes.
+ */
+
+const fs = require('fs');
+const path = require('path');
+const os = require('os');
+
+describe('nesting-guard (DC-077)', () => {
+  const originalEnv = { ...process.env };
+
+  beforeEach(() => {
+    jest.restoreAllMocks();
+  });
+
+  afterEach(() => {
+    process.env = { ...originalEnv };
+    jest.restoreAllMocks();
+  });
+
+  function makeTmpTree() {
+    return fs.mkdtempSync(path.join(os.tmpdir(), 'nest-guard-'));
+  }
+
+  function writeJson(p, obj) {
+    fs.mkdirSync(path.dirname(p), { recursive: true });
+    fs.writeFileSync(p, JSON.stringify(obj));
+  }
+
+  it('removes a recursive data/data duplicate when present', () => {
+    const tmp = makeTmpTree();
+    writeJson(path.join(tmp, 'config.json'), { x: 1 });
+    writeJson(path.join(tmp, 'data', 'config.json'), { x: 1 });
+    writeJson(path.join(tmp, 'data', 'services.json'), []);
+
+    process.env.SERVICES_FILE = path.join(tmp, 'services.json');
+    process.env.CONFIG_FILE = path.join(tmp, 'config.json');
+
+    let cleanupLog = '';
+    let warnLog = '';
+    jest.isolateModules(() => {
+      const guard = require('../src/utilities/nesting-guard');
+      jest.spyOn(console, 'log').mockImplementation((m) => { cleanupLog += String(m) + '\n'; });
+      jest.spyOn(console, 'warn').mockImplementation((m) => { warnLog += String(m) + '\n'; });
+      guard();
+    });
+
+    expect(fs.existsSync(path.join(tmp, 'data'))).toBe(false);
+    expect(fs.existsSync(path.join(tmp, 'config.json'))).toBe(true);
+    expect(cleanupLog).toMatch(/Removing recursive data nesting|Recursive nesting removed/);
+    expect(warnLog).not.toMatch(/Skipped/);
+  });
+
+  it('does nothing when no nested data/data directory exists', () => {
+    const tmp = makeTmpTree();
+    writeJson(path.join(tmp, 'config.json'), { x: 1 });
+
+    process.env.SERVICES_FILE = path.join(tmp, 'services.json');
+    process.env.CONFIG_FILE = path.join(tmp, 'config.json');
+
+    let cleanupLog = '';
+    let warnLog = '';
+    jest.isolateModules(() => {
+      const guard = require('../src/utilities/nesting-guard');
+      jest.spyOn(console, 'log').mockImplementation((m) => { cleanupLog += String(m) + '\n'; });
+      jest.spyOn(console, 'warn').mockImplementation((m) => { warnLog += String(m) + '\n'; });
+      guard();
+    });
+
+    expect(fs.existsSync(path.join(tmp, 'config.json'))).toBe(true);
+    expect(warnLog).not.toMatch(/Skipped/);
+    expect(cleanupLog).not.toMatch(/Removing recursive data nesting/);
+  });
+
+  it('src/config/paths exports dataDir as a non-empty string', () => {
+    let dataDir;
+    jest.isolateModules(() => {
+      const paths = require('../src/config/paths');
+      dataDir = paths.dataDir;
+    });
+    expect(typeof dataDir).toBe('string');
+    expect(dataDir.length).toBeGreaterThan(0);
+  });
+
+  it('src/config/paths.dataDir equals dirname(SERVICES_FILE) when SERVICES_FILE env is set', () => {
+    const tmp = makeTmpTree();
+    process.env.SERVICES_FILE = path.join(tmp, 'services.json');
+    process.env.CONFIG_FILE = path.join(tmp, 'config.json');
+
+    let servicesFile, dataDir;
+    jest.isolateModules(() => {
+      const paths = require('../src/config/paths');
+      servicesFile = paths.SERVICES_FILE;
+      dataDir = paths.dataDir;
+    });
+
+    expect(dataDir).toBe(path.dirname(servicesFile));
+    expect(dataDir).toBe(tmp);
+  });
+});

dashcaddy-api/src/config/paths.js

@@ -31,6 +31,17 @@ module.exports = {
   CADDY_ADMIN_URL,
   SERVICES_FILE,
   SERVICES_DIR,
+  // Re-export the resolved data directory so other modules (notably
+  // src/utilities/nesting-guard.js) can locate `/app/data` without having to
+  // also require('../../platform-paths') — keeps a single source of truth for
+  // the data dir on the src/config/paths surface. Without this, `dataDir`
+  // resolves to `undefined`, and `path.join(undefined, 'data')` throws
+  // `TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type
+  // string. Received undefined` at startup (DC-077 fingerprint). Fall back to
+  // platformPaths.dataDir if SERVICES_DIR is somehow not a string (defensive —
+  // SERVICES_DIR is computed from a path.dirname() of a string so it always
+  // is, but the cost of guarding is one branch).
+  dataDir: typeof SERVICES_DIR === 'string' && SERVICES_DIR ? SERVICES_DIR : platformPaths.dataDir,
   CONFIG_FILE,
   DNS_CREDENTIALS_FILE,
   TAILSCALE_CONFIG_FILE,

dashcaddy-api/src/utilities/nesting-guard.js

@@ -14,8 +14,19 @@ const path = require('path');
 module.exports = function nestingGuard() {
   try {
     const paths = require('../config/paths');
-    const dataDir = paths.dataDir;
-    const dataDataPath = path.join(dataDir, 'data');
+    const dataDir = paths && paths.dataDir;
+    // Defensive: if paths.dataDir is undefined (older callers or a future
+    // export-shape drift), fall back to platformPaths.dataDir directly so the
+    // guard can still execute. Pre-fix this branch was swallowed silently by
+    // the outer try/catch, leaving the entire nesting-guard a no-op (DC-077).
+    const effectiveDataDir = typeof dataDir === 'string' && dataDir
+      ? dataDir
+      : require('../../platform-paths').dataDir;
+    if (typeof effectiveDataDir !== 'string' || !effectiveDataDir) {
+      console.warn('[nesting-guard] Skipped: dataDir unavailable from src/config/paths and platform-paths');
+      return;
+    }
+    const dataDataPath = path.join(effectiveDataDir, 'data');
 
     // If data/data exists, it's a recursive duplicate — remove it
     if (fs.existsSync(dataDataPath)) {