Public/Write-Log.ps1
|
# ------------------------------------------------------------------------------ # Logging function # ------------------------------------------------------------------------------ function Write-Log { <# .SYNOPSIS Formats output message as a log .DESCRIPTION The Write-Log function outputs the time and type of a message in a formatt- ed manner with respective colour code. It takes two parameters: - Type of output: information, warning, error, debug, or checkpoint. - Message: output content. .PARAMETER Type The Type parameter defines the level of importance of the message and will influence the colour of the output. There are five available message types: - CHECK: checkpoint, used to confirm a status; - DEBUG: debug message, used to debug scripts; - ERROR: error message, used to provide detail on an issue; - INFO: information, used to convey a message; - WARN: warning, used to highlight a non-blocking issue. .PARAMETER Message The Message parameter corresponds to the desired output to be logged. .PARAMETER ErrorCode The error code parameter acts as a switch. If specified, the script exe- cution is terminated and the value corresponds to the error code to throw when terminating the script. .INPUTS None. You cannot pipe objects to Write-Log. .OUTPUTS None. Simply writes a message to the host. .EXAMPLE Write-Log -Type "INFO" -Message "This is an informational message." This example outputs an informational message with the timestamp, the "INFO" tag, and the specified message itself. It uses the defaut color scheme. .EXAMPLE Write-Log -Type "WARN" -Message "This is a warning message." This example outputs a warning message with the timestamp, the "WARN" tag, and the specified message itself. The message will be displayed in yellow in the host. .EXAMPLE Write-Log -Type "ERROR" -Message "This is an error message." This example outputs an error message with the timestamp, the "ERROR" tag, and the specified message itself. The message will be displayed in red in the host. .EXAMPLE Write-Log -Type "ERROR" -Message "This is an error message." -ErrorCode 1 This example outputs an error message with the timestamp, the "ERROR" tag, and the specified message itself. The script will terminate with the exit code 1. .EXAMPLE Write-Log -Type "CHECK" -Message "This is a checkpoint message." This example outputs a checkpoint message with the timestamp, the "CHECK" tag, and the specified message itself. The message will be displayed in green in the host. .EXAMPLE Write-Log -Type "DEBUG" -Message "This is a debug message." This example outputs a message through the default DEBUG PowerShell chanel, if the -DEBUG flag is enabled. .NOTES File name: Write-Log.ps1 Author: Florian Carrier Creation date: 15/10/2018 Last modified: 06/06/2019 TODO Add locale variable .LINK https://github.com/Akaizoku/PSTK #> [CmdletBinding ()] # Inputs Param ( [Parameter ( Position = 1, Mandatory = $true, HelpMessage = "Type of message to output" )] [ValidateSet ( "CHECK", "DEBUG", "ERROR", "INFO", "WARN" )] [String] $Type, [Parameter ( Position = 2, Mandatory = $true, HelpMessage = "Message to output" )] [ValidateNotNull ()] [Alias ("Message", "Output", "Log")] [Object] $Object, [Parameter ( Position = 3, Mandatory = $false, HelpMessage = "Error code" )] [Int] $ErrorCode, [Parameter ( Position = 4, Mandatory = $false, HelpMessage = "Path to an optional output file" )] [Alias ("Path")] [String] $File ) Begin { # Get global preference variables Get-CallerPreference -Cmdlet $PSCmdlet -SessionState $ExecutionContext.SessionState # Variables $Time = Get-Date -Format "yyyy-MM-dd HH:mm:ss" $Colour = [Ordered]@{ "CHECK" = "Green" "ERROR" = "Red" "INFO" = "White" "WARN" = "Yellow" } # Ensure message is a string if ($Object.GetType() -ne "String") { $Message = ($Object | Out-String).Trim() } else { $Message = $Object.Trim() } } Process { if ($Type -eq "DEBUG") { Write-Debug -Message $Message } else { # Format log $Log = "$Time`t$Type`t$Message" # Output Write-Host -Object $Log -ForegroundColor $Colour.$Type } if ($PSBoundParameters.ContainsKey("File")) { Write-Log -Type "DEBUG" -Message $Path $Message | Out-File -FilePath $Path -Append -Force } if ($PSBoundParameters.ContainsKey("ErrorCode")) { Stop-Script -ErrorCode $ErrorCode } } } |