I am writing a PowerShell cmdlet in C#, and I need to add some diagnostic logging to the script so that I can evaluate the behavior through TeamCity. Having experimented with WriteVerbose with the -Verbose flag enabled for the function, nothing was logged to TeamCity.
What is the equivalent of Write-Host for a cmdlet?
What is the difference between the following cmdlets:
In case anyone else encounters this issue, this is what I learnt: PowerShell supports many different output streams.
The one that TeamCity is after however is none of the above, [C#] Console.WriteLine is sufficient to log to the TeamCity trace log.
To answer my previous question:
WriteError is used for returning exceptions properly (this works well, albeit a little convoluted, just using C# throw will crash PowerShell when debugging a cmdlet).
WriteObject is used for returning custom or existing C# objects from the cmdlet to the variable assignment (e.g. [PowerShell] $x = Do-Something, where [C#] WriteObject(Output) would be returned to [PowerShell] $x).
WriteInformation (new in PowerShell 5) is the new way to write to the output stream, Write-Output now redirects to the Information stream.