PowerShell removing console message colors when using tee-object
Try this instead:
powershell.exe -noprofile -command { $path\test_main.ps1 | tee-object $log }This happens because this part is executed first:
powershell.exe -noprofile -file $project_root/test_main.ps1 Such that what tee-object sees is the output of a native EXE. And AFAICT, PowerShell doesn't output error records (or highlight) stderr output from a native EXE (unless you redirect the error stream e.g. 2>err.log.