Powershell-ExecScriptBlock

$ErrorActionPreference = "Stop"

function exec( [ScriptBlock] $cmd){
    ( & $cmd ) 2>&1 # TeamCity doesn't show the output without the 2>&1
    
    if($LASTEXITCODE -ne 0){
        throw "Exec returned $LASTEXITCODE"
    }
}

#Usage example:
#exec { git fetch }