v1.8.93: rewrite update script from VBS+PowerShell to plain BAT with logging

VBS→PowerShell chain was silently failing. BAT is simpler, doesn't depend
on execution policy, and writes detailed log to %TEMP%\sm_update.log
for debugging.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

core/updater.py

@@ -262,75 +262,98 @@ class UpdateChecker:
             return self._apply_linux(binary_path, current_exe)
 
     def _apply_windows(self, new_exe: str, current_exe: str) -> bool:
-        """Windows update: PowerShell script waits for exit, copies, launches."""
+        """Windows update: BAT script waits for exit, copies, launches."""
         try:
             tmp_dir = tempfile.gettempdir()
-            ps_path = os.path.join(tmp_dir, "sm_update.ps1")
-            vbs_path = os.path.join(tmp_dir, "sm_update.vbs")
+            bat_path = os.path.join(tmp_dir, "sm_update.bat")
+            log_path = os.path.join(tmp_dir, "sm_update.log")
             pid = os.getpid()
-            mei_dir = getattr(sys, '_MEIPASS', '')
-            exe_dir = os.path.dirname(current_exe)
 
-            ps_content = f"""
-$pid = {pid}
-$src = '{new_exe}'
-$dst = '{current_exe}'
-$tempDir = '{tmp_dir}'
+            bat_content = f"""@echo off
+chcp 65001 >nul 2>&1
+set "LOGFILE={log_path}"
+set "SRC={new_exe}"
+set "DST={current_exe}"
+set "PID={pid}"
+set "TMPDIR={tmp_dir}"
 
-# Wait for old process to exit
-while (Get-Process -Id $pid -ErrorAction SilentlyContinue) {{
-    Start-Sleep -Seconds 1
-}}
-Start-Sleep -Seconds 3
+echo [%date% %time%] Update script started >> "%LOGFILE%"
+echo [%date% %time%] PID to wait for: %PID% >> "%LOGFILE%"
+echo [%date% %time%] SRC: %SRC% >> "%LOGFILE%"
+echo [%date% %time%] DST: %DST% >> "%LOGFILE%"
 
-# Clean ALL stale _MEI directories (best-effort, skip locked)
-try {{
-    Get-ChildItem -Path $tempDir -Directory -Filter '_MEI*' -ErrorAction SilentlyContinue | ForEach-Object {{
-        Remove-Item -Path $_.FullName -Recurse -Force -ErrorAction SilentlyContinue
-    }}
-}} catch {{}}
-Start-Sleep -Seconds 1
+:wait_loop
+tasklist /FI "PID eq %PID%" 2>nul | find "%PID%" >nul
+if %errorlevel%==0 (
+    echo [%date% %time%] Waiting for PID %PID% to exit... >> "%LOGFILE%"
+    timeout /t 1 /nobreak >nul
+    goto wait_loop
+)
 
-# Copy with retry
-$copied = $false
-for ($i = 0; $i -lt 5; $i++) {{
-    try {{
-        Copy-Item -Path $src -Destination $dst -Force
-        $srcSize = (Get-Item $src).Length
-        $dstSize = (Get-Item $dst).Length
-        if ($srcSize -eq $dstSize) {{
-            $copied = $true
-            break
-        }}
-    }} catch {{}}
-    Start-Sleep -Seconds 2
-}}
+echo [%date% %time%] Process exited, waiting 3s... >> "%LOGFILE%"
+timeout /t 3 /nobreak >nul
 
-if (-not $copied) {{ exit 1 }}
+rem Clean stale _MEI directories
+echo [%date% %time%] Cleaning _MEI directories... >> "%LOGFILE%"
+for /d %%D in ("%TMPDIR%\\_MEI*") do (
+    rmdir /s /q "%%D" >nul 2>&1
+)
+timeout /t 1 /nobreak >nul
 
-Start-Sleep -Seconds 2
+rem Copy with retry
+echo [%date% %time%] Starting copy... >> "%LOGFILE%"
+set COPIED=0
+for /L %%i in (1,1,5) do (
+    if !COPIED!==0 (
+        copy /Y "%SRC%" "%DST%" >nul 2>&1
+        if exist "%DST%" (
+            echo [%date% %time%] Copy attempt %%i done >> "%LOGFILE%"
+            set COPIED=1
+        ) else (
+            echo [%date% %time%] Copy attempt %%i failed >> "%LOGFILE%"
+            timeout /t 2 /nobreak >nul
+        )
+    )
+)
 
-# Launch new exe via cmd start (clean environment, proper path handling)
-Start-Process cmd.exe -ArgumentList '/c', 'start', '""', ('"{0}"' -f $dst) -WindowStyle Hidden
+if %COPIED%==0 (
+    echo [%date% %time%] FAILED: could not copy after 5 attempts >> "%LOGFILE%"
+    pause
+    goto cleanup
+)
 
-# Cleanup
-Start-Sleep -Seconds 3
-Remove-Item -Path $src -Force -ErrorAction SilentlyContinue
-Remove-Item -Path '{ps_path}' -Force -ErrorAction SilentlyContinue
+echo [%date% %time%] Copy successful, launching... >> "%LOGFILE%"
+timeout /t 2 /nobreak >nul
+
+rem Launch new exe
+echo [%date% %time%] Starting: %DST% >> "%LOGFILE%"
+start "" "%DST%"
+
+echo [%date% %time%] Launch command issued >> "%LOGFILE%"
+timeout /t 2 /nobreak >nul
+
+:cleanup
+rem Delete downloaded update file
+del /f /q "%SRC%" >nul 2>&1
+echo [%date% %time%] Cleanup done >> "%LOGFILE%"
+
+rem Self-delete
+del /f /q "%~f0" >nul 2>&1
 """
-            with open(ps_path, "w", encoding="utf-8") as f:
-                f.write(ps_content)
+            # Enable delayed expansion for variables inside for loops
+            bat_content = bat_content.replace("@echo off",
+                                             "@echo off\nsetlocal enabledelayedexpansion")
 
-            # VBS wrapper launches PowerShell hidden (no window flash)
-            vbs_content = (
-                'CreateObject("Wscript.Shell").Run '
-                '"powershell -ExecutionPolicy Bypass -WindowStyle Hidden '
-                f'-File ""{ps_path}""""", 0, False\n'
+            with open(bat_path, "w", encoding="utf-8") as f:
+                f.write(bat_content)
+
+            log.info(f"Update BAT: {bat_path}, log: {log_path}")
+
+            # Launch BAT minimized (not hidden — need cmd.exe to run)
+            subprocess.Popen(
+                ["cmd.exe", "/c", "start", "/min", "", bat_path],
+                creationflags=_SUBPROCESS_FLAGS,
             )
-            with open(vbs_path, "w") as f:
-                f.write(vbs_content)
-
-            os.startfile(vbs_path)
             return True
 
         except Exception as e:

version.py

@@ -1,6 +1,6 @@
 """Version info for ServerManager."""
 
-__version__ = "1.8.92"
+__version__ = "1.8.93"
 __app_name__ = "ServerManager"
 __author__ = "aibot777"
 __description__ = "Desktop GUI for managing remote servers"