Question

I currently have a script that is executed as follows:
.\script.ps1 “param1” “param2” 2>&1 | tee -filePath buildlog.txt

I can’t find a way to do the following.. logging to both the console and file encapsulated within the script.
.\script.ps1 “param1” “param2”

Here’s my attempt at doing it:

powershelltest.ps1

param([string]$paramOne, [string]$paramTwo)

function DoWork()
{
 Write-Host '3'
}

function WriteLogFile()
{
    DoWork
 # The following would not be captured by Start-Transcript & Stop-Transcript
 # program.exe ....
 Write-Host '4'
}

function CollectorFunction()
{
    Write-Host '2'
 WriteLogFile;
    Write-Host '5'
}

Write-Host '1'
CollectorFunction 2>&1 | tee -filePath c:\log.foo

Answer 1

If you want to write to a log file don’t use Write-Host. Use Write-Output or don’t use Write-* at all because Write-Output is the default e.g:

Write-Output 'hello' > foo.txt

is equivalent to:

'hello' > foo.txt

Write-Output sends output to the stdout stream (ie 1). Use Write-Error to send output to the error stream (ie 2). These two streams can be redirected. Write-Host more or less writes directly to the host UI bypassing output streams altogether.

In PowerShell V3, you can also redirect the following streams:

The Windows PowerShell redirection operators use the following characters
to represent each output type:
  *   All output
  1   Success output
  2   Errors
  3   Warning messages
  4   Verbose output
  5   Debug messages