Compel UTF8 encoding so the powershell trick works even with files that don't...

Compel UTF8 encoding so the powershell trick works even with files that don't have valid names in the current codepage

devTools/concatFiles.bat

 @echo off
 :: Concatenates files from dir %1 specified with wildcard %2 and outputs result to %3
 
+:: temporary codepage change to avoid mojibake
+FOR /f "tokens=2 delims=:." %%x IN ('CHCP') DO SET _cp=%%x
+CHCP 65001 > NUL
+
 :: TODO Proper temp file instead of bin\list.txt
 IF EXIST %3 DEL %3
 SET _LISTFILE="bin\list.txt"
@@ -12,7 +16,7 @@ sort /O %_LISTFILE% %_LISTFILE%
 :: If we have powershell available, strip the absolute path information
 :: If not, fail silently (which is fine, but will leak path information into the built file)
 powershell -command "" 2> NUL
-IF %ERRORLEVEL% EQU 0 powershell -command "(get-content -path %_LISTFILE% -raw) -replace [regex]::escape('%CD%'),'' -replace '\"','' ^| set-content -path %_LISTFILE%"
+IF %ERRORLEVEL% EQU 0 powershell -command "(get-content -path %_LISTFILE% -raw -encoding utf8) -replace [regex]::escape('%CD%'),'' -replace '\"','' ^| set-content -encoding utf8 -path %_LISTFILE%"
 
 :: Append the files
 (FOR /F "usebackq delims=" %%F IN (`type "%_LISTFILE%"`) DO (
@@ -22,3 +26,4 @@ IF %ERRORLEVEL% EQU 0 powershell -command "(get-content -path %_LISTFILE% -raw)
 )
 
 DEL %_LISTFILE%
+CHCP %_CP% > NUL
\ No newline at end of file