Fix Windows mpv logging and add log export (#88)

src/shared/log-files.test.ts

@@ -3,7 +3,14 @@ import assert from 'node:assert/strict';
 import fs from 'node:fs';
 import os from 'node:os';
 import path from 'node:path';
-import { appendLogLine, pruneLogFiles, resolveDefaultLogFilePath } from './log-files';
+import {
+  applyLogFileTogglesToEnv,
+  appendLogLine,
+  isLogFileEnabled,
+  pruneLogDirectoryForPath,
+  pruneLogFiles,
+  resolveDefaultLogFilePath,
+} from './log-files';
 
 test('resolveDefaultLogFilePath uses app prefix by default', () => {
   const now = new Date('2026-03-22T12:00:00.000Z');
@@ -15,16 +22,47 @@ test('resolveDefaultLogFilePath uses app prefix by default', () => {
 
   assert.equal(
     resolved,
-    path.join(
-      '/home/tester',
-      '.config',
-      'SubMiner',
-      'logs',
-      `app-${now.toISOString().slice(0, 10)}.log`,
-    ),
+    path.join('/home/tester', '.config', 'SubMiner', 'logs', 'app-2026-03-22.log'),
   );
 });
 
+test('resolveDefaultLogFilePath uses daily filenames for mpv logs', () => {
+  const now = new Date('2026-03-22T12:00:00.000Z');
+  const resolved = resolveDefaultLogFilePath('mpv', {
+    platform: 'linux',
+    homeDir: '/home/tester',
+    now,
+  });
+
+  assert.equal(
+    resolved,
+    path.join('/home/tester', '.config', 'SubMiner', 'logs', 'mpv-2026-03-22.log'),
+  );
+});
+
+test('log file toggles keep app and launcher enabled while mpv defaults off', () => {
+  assert.equal(isLogFileEnabled('app', {}), true);
+  assert.equal(isLogFileEnabled('launcher', {}), true);
+  assert.equal(isLogFileEnabled('mpv', {}), false);
+  assert.equal(isLogFileEnabled('mpv', { SUBMINER_MPV_LOG: '/tmp/mpv.log' }), true);
+  assert.equal(
+    isLogFileEnabled('mpv', {
+      SUBMINER_MPV_LOG: '/tmp/mpv.log',
+      SUBMINER_MPV_LOG_ENABLED: 'false',
+    }),
+    false,
+  );
+});
+
+test('applyLogFileTogglesToEnv writes log enable env flags', () => {
+  const env: NodeJS.ProcessEnv = {};
+  applyLogFileTogglesToEnv({ app: false, launcher: true, mpv: true }, env);
+
+  assert.equal(env.SUBMINER_APP_LOG_ENABLED, 'false');
+  assert.equal(env.SUBMINER_LAUNCHER_LOG_ENABLED, 'true');
+  assert.equal(env.SUBMINER_MPV_LOG_ENABLED, 'true');
+});
+
 test('pruneLogFiles removes logs older than retention window', () => {
   const logsDir = fs.mkdtempSync(path.join(os.tmpdir(), 'subminer-log-prune-'));
   const stalePath = path.join(logsDir, 'app-old.log');
@@ -69,3 +107,22 @@ test('appendLogLine trims oversized logs to newest bytes', () => {
     fs.rmSync(logsDir, { recursive: true, force: true });
   }
 });
+
+test('empty log path operations are no-ops', () => {
+  const cwd = process.cwd();
+  const logsDir = fs.mkdtempSync(path.join(os.tmpdir(), 'subminer-empty-log-path-'));
+  const candidate = path.join(logsDir, 'cwd.log');
+
+  try {
+    process.chdir(logsDir);
+    fs.writeFileSync(candidate, 'keep\n', 'utf8');
+
+    pruneLogDirectoryForPath('', 1);
+    appendLogLine('', 'ignored', { retentionDays: 1 });
+
+    assert.equal(fs.readFileSync(candidate, 'utf8'), 'keep\n');
+  } finally {
+    process.chdir(cwd);
+    fs.rmSync(logsDir, { recursive: true, force: true });
+  }
+});