Harden Windows release packaging

publish.bat

@@ -6,47 +6,81 @@ set "ARCHIVE_BASENAME=blitzforge-windows-x64"
 set "ARCHIVE_PATH=%ROOTDIR%\release\%ARCHIVE_BASENAME%.zip"
 
 call "%ROOTDIR%\compile.bat"
+if errorlevel 1 goto :fail
 
 cd /d "%ROOTDIR%"
 
 if exist "%ROOTDIR%\release" rmdir /S /Q "%ROOTDIR%\release"
 
 mkdir "%ROOTDIR%\release"
 
-xcopy /E /Y /I "%ROOTDIR%\bin" "%ROOTDIR%\release\bin"
-xcopy /E /Y /I "%ROOTDIR%\cfg" "%ROOTDIR%\release\cfg"
-xcopy /E /Y /I "%ROOTDIR%\games" "%ROOTDIR%\release\games"
-xcopy /E /Y /I "%ROOTDIR%\help" "%ROOTDIR%\release\help"
-xcopy /E /Y /I "%ROOTDIR%\media" "%ROOTDIR%\release\media"
-xcopy /E /Y /I "%ROOTDIR%\mediaview" "%ROOTDIR%\release\mediaview"
-xcopy /E /Y /I "%ROOTDIR%\samples" "%ROOTDIR%\release\samples"
-xcopy /E /Y /I "%ROOTDIR%\tutorials" "%ROOTDIR%\release\tutorials"
-xcopy /E /Y /I "%ROOTDIR%\userlibs" "%ROOTDIR%\release\userlibs"
+call :copy_tree_if_exists "%ROOTDIR%\bin" "%ROOTDIR%\release\bin"
+if errorlevel 1 goto :fail
+call :copy_tree_if_exists "%ROOTDIR%\cfg" "%ROOTDIR%\release\cfg"
+if errorlevel 1 goto :fail
+call :copy_tree_if_exists "%ROOTDIR%\games" "%ROOTDIR%\release\games"
+if errorlevel 1 goto :fail
+call :copy_tree_if_exists "%ROOTDIR%\help" "%ROOTDIR%\release\help"
+if errorlevel 1 goto :fail
+call :copy_tree_if_exists "%ROOTDIR%\media" "%ROOTDIR%\release\media"
+if errorlevel 1 goto :fail
+call :copy_tree_if_exists "%ROOTDIR%\mediaview" "%ROOTDIR%\release\mediaview"
+if errorlevel 1 goto :fail
+call :copy_tree_if_exists "%ROOTDIR%\samples" "%ROOTDIR%\release\samples"
+if errorlevel 1 goto :fail
+call :copy_tree_if_exists "%ROOTDIR%\tutorials" "%ROOTDIR%\release\tutorials"
+if errorlevel 1 goto :fail
+call :copy_tree_if_exists "%ROOTDIR%\userlibs" "%ROOTDIR%\release\userlibs"
+if errorlevel 1 goto :fail
 
 REM Copy the compiled vscode extension
 if exist "%ROOTDIR%\..\..\extras\vscode-blitz-forge" (
     call "%ROOTDIR%\..\..\extras\vscode-blitz-forge\compile.bat"
+    if errorlevel 1 goto :fail
 
     cd /d "%ROOTDIR%"
 
-    xcopy /Y "%ROOTDIR%\..\..\extras\vscode-blitz-forge\*.vsix" "%ROOTDIR%\release\"
+    if exist "%ROOTDIR%\..\..\extras\vscode-blitz-forge\*.vsix" (
+        xcopy /Y "%ROOTDIR%\..\..\extras\vscode-blitz-forge\*.vsix" "%ROOTDIR%\release\" >nul
+        if errorlevel 1 goto :fail
+    )
 )
 
 REM Create a README.txt file
-echo "BlitzForge is a compiler for an enhanced version of the Blitz3D language. It is a fork of the Blitz3D compiler and adds support for the BlitzForge commands and syntax. You can develop with BlitzForge in Visual Studio Code by installing the .vsix extension. Press Ctrl+Shift+P and search for vsix to install the extension." > "%ROOTDIR%\release\README.txt"
+(
+    echo BlitzForge is a compiler for an enhanced version of the Blitz3D language.
+    echo It is a fork of the Blitz3D compiler and adds support for BlitzForge commands and syntax.
+    echo You can develop with BlitzForge in Visual Studio Code by installing the bundled .vsix extension.
+) > "%ROOTDIR%\release\README.txt"
 
 set "PACKAGE_TMP=%TEMP%\blitzforge-package-%RANDOM%-%RANDOM%"
 set "PACKAGE_ROOT=%PACKAGE_TMP%\%ARCHIVE_BASENAME%"
 mkdir "%PACKAGE_ROOT%"
 xcopy /E /Y /I "%ROOTDIR%\release\*" "%PACKAGE_ROOT%\" >nul
+if errorlevel 1 goto :fail
 if exist "%ARCHIVE_PATH%" del /Q "%ARCHIVE_PATH%"
 powershell -NoProfile -Command "Compress-Archive -Path '%PACKAGE_ROOT%' -DestinationPath '%ARCHIVE_PATH%' -CompressionLevel Optimal"
 if errorlevel 1 (
-    rd /S /Q "%PACKAGE_TMP%"
-    endlocal
-    exit /b 1
+    goto :fail
 )
 rd /S /Q "%PACKAGE_TMP%"
 echo Created release archive: "%ARCHIVE_PATH%"
 
 endlocal
+exit /b 0
+
+:copy_tree_if_exists
+set "COPY_SOURCE=%~1"
+set "COPY_DEST=%~2"
+if not exist "%COPY_SOURCE%\" exit /b 0
+xcopy /E /Y /I "%COPY_SOURCE%" "%COPY_DEST%" >nul
+if errorlevel 1 (
+    echo Failed to copy "%COPY_SOURCE%" into "%COPY_DEST%"
+    exit /b 1
+)
+exit /b 0
+
+:fail
+if exist "%PACKAGE_TMP%" rd /S /Q "%PACKAGE_TMP%"
+endlocal
+exit /b 1