Helper/Write-Log.ps1
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function Write-Log { <# .Synopsis Write-Log / Log Logs text to the console and/or to a file. .DESCRIPTION A comprehensive helper function for structured logging. Writes one or more messages to the different available outputchannels of the powershell and to one or more logfiles. .NOTES Version: 2.4 Author: Andreas Bellstedt History: 01.07.2016 - First Version 07.08.2016 - add logging to differnt output channels and more flexibility in parameters 14.08.2016 - changing synopsis position to powershell best practices. (before funktion block) 27.01.2017 - add parameters $Type and $logscope to easy logging structur and prevent the need of global variables for (status)types 29.01.2017 - change debug output procedure for better handling .EXAMPLE Examples without logging to a file. Only console output is done. The following examples only produces output if the verbosepreference in current session is set to "continue", or the -verbose switch is specified: Write-Log -LogText "This is a Message" Write-Log "This is a Message" Log "This is a Message" "This is a Message" | Write-Log -> VERBOSE: [2016-08-08 08:08:08] [NOFILE] This is a Message "This is a Message" , "This is anonther Message" | Write-Log -LogType Info -> VERBOSE: [2016-08-08 08:08:08] [NOFILE] [INFO ] This is a Message VERBOSE: [2016-08-08 08:08:08] [NOFILE] [INFO ] This is another Message .EXAMPLE Examples without logging to a file. Only console output is done. The following examples produces output irrespective of the verbosepreference: Write-Log -LogText "This is a Message" -LogType Warning -LogScope "Function01" -Warning -> WARNING: [2016-08-08 08:08:08] [NOFILE] [WARNING] [FUNCTION01] This is a Message Write-Log -LogText "This is a Message" -LogType Error -LogScope "Function01" -Error -> Write-Log : [2016-08-07 16:13:28] [NOFILE] [ERROR ] [FUNCTION01] This is a Message + Write-Log -LogText "This is a Message" -Error + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : NotSpecified: (:) [Write-Error], WriteErrorException + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,Write-Log Write-Log -LogText "This is a Message" -Console Write-Log -LogText "This is a Message" -Visible -> [2016-08-08 08:08:08] [NOFILE] This is a Message Write-Log -LogText "This is a Message" -Console -Warning -> WARNING: [2016-08-08 08:08:08] [NOFILE] This is a Message Write-Log -LogText "This is a Message" -Console -NoFileStatus -> [2016-08-08 08:08:08] This is a Message Write-Log -LogText "This is a Message" -Console -NoFileStatus -NoTimeStamp -> This is a Message .EXAMPLE Examples without logging to a file. Only console output is done. The following examples produces output to the debug channel: Write-Log -LogText "This is a Message" -DebugOutput -> DEBUG: [2016-08-08 08:08:08] [NOFILE] This is a Message Write-Log -LogText "This is a Message" -DebugOutput -Warning -> DEBUG: WARNING: [2016-08-08 08:08:08] [NOFILE] This is a Message .EXAMPLE Examples without logging to a file. Write-Log -LogText "This is a Message" -LogFile 'C:\Administration\Logs\Logfile.log' -> VERBOSE: [2016-08-08 08:08:08] [FILE ] This is a Message Write-Log -LogText "This is a Message" -LogFile 'C:\Administration\Logs\Logfile.log', 'C:\Administration\Logs\Logfile-Errors.log' -Warning -> WARNING: [2016-08-08 08:08:08] [FILE ] This is a Message Write-Log -LogText "This is a Message" -LogFile 'C:\Administration\Logs\Logfile.log', 'C:\Administration\Logs\Logfile-Errors.log' -Error -> Write-Log : [2016-08-08 08:08:08] [FILE ] This is a Message In Zeile:1 Zeichen:1 + Write-Log -LogText "This is a Message" -LogFile 'C:\Administration\Lo ... + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : NotSpecified: (:) [Write-Error], WriteErrorException + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,Write-Log #> [CmdletBinding(DefaultParameterSetName='VerboseOutput', ConfirmImpact="Low")] [Alias('Log')] Param( #The message to be logged [parameter( Mandatory=$true, Position=0, ValueFromPipeline=$true )] [Alias('Text', 'Message')] [string]$LogText, #The kind of event/action what is happening while the message is logged [parameter( Mandatory=$false, Position=1)] [Alias('Type')] [ValidateSet('Warning', 'Info', 'Query', 'Set', 'Error')] [string]$LogType, #The name of the function or the scriptpart where the log event happens [parameter( Mandatory=$false, Position=2 )] [Alias('Scope')] [string]$LogScope, #The name of the logfile(s) where the message should be logged [parameter( Mandatory=$false )] [Alias('File')] [string[]]$LogFile, #Suppress the timestamp in the logged output [parameter( Mandatory=$false )] [switch]$NoTimeStamp, #Suppress the info, wether the logged output is written to file or only displayed in the outputchannel [parameter( Mandatory=$false )] [switch]$NoFileStatus, #Specifies that LogText is displayed as text in the debug-channel, not in the verbose-channel [parameter( Mandatory=$false, ParameterSetName='DebugOutput' )] [switch]$DebugOutput, #Specifies that LogText is displayed as text in the console window, not in the verbose-channel [parameter( Mandatory=$false, ParameterSetName='ConsoleOutput' )] [Alias('Visible')] [switch]$Console, #Specifies that LogText is displayed as (red) error message in the console window, not in the verbose-channel [parameter( Mandatory=$false, ParameterSetName='ErrorOutput' )] [switch]$Error, #Logs the LogText as warrning message to the console [parameter( Mandatory=$false, ParameterSetName='VerboseOutput' )] [parameter( Mandatory=$false, ParameterSetName='DebugOutput' )] [parameter( Mandatory=$false, ParameterSetName='ConsoleOutput' )] [switch]$Warning ) Begin { #$Local:logscope = $MyInvocation.MyCommand.Name switch ($LogType) { 'Warning' { $Type = '[WARNING] ' } 'Info' { $Type = '[INFO ] ' } 'Query' { $Type = '[QUERY ] ' } 'Set' { $Type = '[SET ] ' } 'Error' { $Type = '[ERROR ] ' } Default { $Type = '[INFO ] ' } } if($logScope) { $LogScope = "[$($LogScope.ToUpper())] " } if($NoFileStatus) { $status = '' } else { $status = "[NOFILE] " } if($NoTimeStamp) { $logDate = '' } else { $logDate = "[$(Get-Date -Format "yyyy-MM-dd HH:mm:ss")] " } #turn of confimation for debug actions If(($DebugPreference -eq 'Inquire') -and ($PsCmdlet.ParameterSetName -eq 'DebugOutput')) { $DebugPreferenceOrg = $DebugPreference $DebugPreference = 'Continue' } } Process { if($LogFile) { foreach($File in $LogFile) { Write-Output "$($logDate)$($Type)$($LogScope)$($LogText)" | Out-File -FilePath $File -Append } } $message = "$($logDate)$($status)$($Type)$($LogScope)$($LogText)" switch ($PsCmdlet.ParameterSetName) { 'VerboseOutput' { if ($Warning) { write-warning $message } else { write-verbose $message } } 'DebugOutput' { if ($Warning) { Write-Debug "WARNING: $message" } else { Write-Debug $message } } 'ConsoleOutput' { if ($Warning) { Write-Host "WARNING: $message" -ForegroundColor $Host.PrivateData.WarningForegroundColor -BackgroundColor $Host.PrivateData.WarningBackgroundColor }else{ Write-Host $message } } 'ErrorOutput' { Write-error $message } } } End { $DebugPreference = $DebugPreferenceOrg Remove-Variable message, logDate, status, Type, DebugPreferenceOrg -Force -ErrorAction Ignore -WhatIf:$false -Confirm:$false -Verbose:$false -Debug:$false } } |