Functions/Start-ScriptLogger.ps1
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<# .SYNOPSIS Start the script logger inside the current PowerShell session. .DESCRIPTION Start the script logger inside the current PowerShell session. By starting the logger, a global log configuration for the current PowerShell session will be set. This configuration is customizable with the available paramters. .PARAMETER Path The path to the log file. .PARAMETER Format This parameter defines, how the log output will be formated. The format definition will be used to call the System.String.Format() method. The following values are used as arguments: {0} Timestamp as datetime value. {1} NetBIOS computer name. {2} Current session username. {3} Log entry level. {4} Message. .PARAMETER Level The event log level. All log messages equal to or higher to the level will be logged. This is the level order: 1. Verbose 2. Information 3. Warning 4. Error .PARAMETER NoLogFile Do not write the log messages into the log file. By default, all messages are written to the specified or default log file. .PARAMETER NoEventLog Skip the event log output. By default, all log messages will be written into the "Windows PowerShell" event log. .PARAMETER NoConsoleOutput Hide the PowerShell console output. By default, all log messages are shown on the console. .EXAMPLE C:\> Start-ScriptLogger Initialize the logger with default values .EXAMPLE C:\>Start-ScriptLogger -Path 'C:\test.log' -Format '{3}: {4}' -Level 'Verbose' -SkipEventLog -HideConsoleOutput Log all message with verbose level or higher to the log file but skip the event log and the consule output. In addition, use a custom format for the log file content. #> function Start-ScriptLogger { [CmdletBinding()] param ( [Parameter(Position=0, Mandatory=$false)] [ValidateScript({(Test-Path -Path (Split-Path -Path $_ -Parent))})] [String] $Path = (Join-Path -Path ([System.IO.Path]::GetTempPath()) -ChildPath 'PowerShell.log'), [Parameter(Position=1, Mandatory=$false)] [ValidateScript({$_ -f (Get-Date), $Env:ComputerName, $Env:Username, 'Verbose', 'Message'})] [String] $Format = '{0:yyyy-MM-dd} {0:HH:mm:ss} {1} {2} {3,-11} {4}', [Parameter(Position=2, Mandatory=$false)] [ValidateSet('Verbose', 'Information', 'Warning', 'Error')] [String] $Level = 'Verbose', [Parameter(Position=3, Mandatory=$false)] [Switch] $NoLogFile, [Parameter(Position=4, Mandatory=$false)] [Switch] $NoEventLog, [Parameter(Position=5, Mandatory=$false)] [Switch] $NoConsoleOutput ) # Create an empty log file, if it does not exist if (-not (Test-Path -Path $Path)) { New-Item -Path $Path -ItemType File | Out-Null } # Only work with absolute path, makes error handling easier $Path = (Resolve-Path -Path $Path).Path Write-Verbose "Enable script logger with log file '$Path'" # Define global variable for the logging $Global:ScriptLogger = New-Object -TypeName PSObject -Property @{ Enabled = $true Path = $Path Format = $Format Level = $Level LogFile = -not $NoLogFile.IsPresent EventLog = -not $NoEventLog.IsPresent ConsoleOutput = -not $NoConsoleOutput.IsPresent } $Global:ScriptLogger.PSTypeNames.Insert(0, 'ScriptLogger.Configuration') } |