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

src/main/runtime/windows-mpv-launch.ts

@@ -1,6 +1,8 @@
 import fs from 'node:fs';
 import { spawn, spawnSync } from 'node:child_process';
+import { isLogFileEnabled } from '../../shared/log-files';
 import { buildMpvLaunchModeArgs } from '../../shared/mpv-launch-mode';
+import { buildMpvMsgLevel } from '../../shared/mpv-logging-args';
 import { buildSubminerPluginRuntimeScriptOptParts } from '../../shared/subminer-plugin-script-opts';
 import type { MpvLaunchMode } from '../../types/config';
 import type { SubminerPluginRuntimeScriptOptConfig } from '../../shared/subminer-plugin-script-opts';
@@ -10,8 +12,9 @@ export interface WindowsMpvLaunchDeps {
   getEnv: (name: string) => string | undefined;
   runWhere: () => { status: number | null; stdout: string; error?: Error };
   fileExists: (candidate: string) => boolean;
-  spawnDetached: (command: string, args: string[]) => Promise<void>;
+  spawnDetached: (command: string, args: string[], env?: NodeJS.ProcessEnv) => Promise<void>;
   showError: (title: string, content: string) => void;
+  logInfo?: (message: string) => void;
 }
 
 export type ConfiguredWindowsMpvPathStatus = 'blank' | 'configured' | 'invalid';
@@ -126,6 +129,13 @@ export function buildWindowsMpvLaunchArgs(
     : shouldPassSubminerScriptOpts
       ? [`subminer-socket_path=${inputIpcServer.replace(/,/g, '\\,')}`]
       : [];
+  const logLevel = pluginRuntimeConfig?.logLevel;
+  const hasMsgLevel = readExtraArgValue(extraArgs, '--msg-level') !== undefined;
+  const hasLogFile = readExtraArgValue(extraArgs, '--log-file') !== undefined;
+  const mpvLogLevelArg =
+    logLevel && !hasMsgLevel && (isLogFileEnabled('mpv') || hasLogFile)
+      ? `--msg-level=${buildMpvMsgLevel(logLevel)}`
+      : null;
   if (!pluginRuntimeConfig && hasBinaryPath) {
     scriptOptPairs.unshift(`subminer-binary_path=${binaryPath.trim().replace(/,/g, '\\,')}`);
   }
@@ -147,6 +157,7 @@ export function buildWindowsMpvLaunchArgs(
     '--secondary-sub-visibility=no',
     ...(scriptOpts ? [scriptOpts] : []),
     ...buildMpvLaunchModeArgs(launchMode),
+    ...(mpvLogLevelArg ? [mpvLogLevelArg] : []),
     ...extraArgs,
     ...targets,
   ];
@@ -197,17 +208,39 @@ export async function launchWindowsMpv(
     if (installedPlugin?.installed && !installedPluginPrompted) {
       runtimePluginPolicy?.notifyInstalledPluginDetected?.(installedPlugin);
     }
-    await deps.spawnDetached(
-      mpvPath,
-      buildWindowsMpvLaunchArgs(
-        targets,
-        extraArgs,
-        binaryPath,
-        runtimePluginEntrypointPath,
-        launchMode,
-        pluginRuntimeConfig,
-      ),
+    const hasLogLevel = pluginRuntimeConfig?.logLevel !== undefined;
+    const hasLogRotation = pluginRuntimeConfig?.logRotation !== undefined;
+    const launchEnv =
+      hasLogLevel || hasLogRotation
+        ? {
+            ...(hasLogLevel
+              ? { SUBMINER_LOG_LEVEL: pluginRuntimeConfig.logLevel }
+              : {}),
+            ...(hasLogRotation
+              ? { SUBMINER_LOG_ROTATION: String(pluginRuntimeConfig.logRotation) }
+              : {}),
+          }
+        : undefined;
+    const launchArgs = buildWindowsMpvLaunchArgs(
+      targets,
+      extraArgs,
+      binaryPath,
+      runtimePluginEntrypointPath,
+      launchMode,
+      pluginRuntimeConfig,
     );
+    const inputIpcServer =
+      readExtraArgValue(launchArgs, '--input-ipc-server') ?? DEFAULT_WINDOWS_MPV_SOCKET;
+    deps.logInfo?.(
+      [
+        `Launching mpv: mpvPath=${mpvPath}`,
+        `inputIpcServer=${inputIpcServer}`,
+        `bundledPlugin=${runtimePluginEntrypointPath ?? 'not injected'}`,
+        `installedPlugin=${installedPlugin?.installed ? (installedPlugin.path ?? 'unknown') : 'none'}`,
+        `targets=${targets.length}`,
+      ].join('; '),
+    );
+    await deps.spawnDetached(mpvPath, launchArgs, launchEnv);
     return { ok: true, mpvPath };
   } catch (error) {
     const message = error instanceof Error ? error.message : String(error);
@@ -220,6 +253,7 @@ export function createWindowsMpvLaunchDeps(options: {
   getEnv?: (name: string) => string | undefined;
   fileExists?: (candidate: string) => boolean;
   showError: (title: string, content: string) => void;
+  logInfo?: (message: string) => void;
 }): WindowsMpvLaunchDeps {
   return {
     getEnv: options.getEnv ?? ((name) => process.env[name]),
@@ -235,13 +269,15 @@ export function createWindowsMpvLaunchDeps(options: {
       };
     },
     fileExists: options.fileExists ?? defaultWindowsMpvFileExists,
-    spawnDetached: (command, args) =>
+    logInfo: options.logInfo,
+    spawnDetached: (command, args, env) =>
       new Promise((resolve, reject) => {
         try {
           const child = spawn(command, args, {
             detached: true,
             stdio: 'ignore',
             windowsHide: true,
+            env: env ? { ...process.env, ...env } : process.env,
           });
           let settled = false;
           child.once('error', (error) => {