Private/Resize-SingleLogfile.ps1
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Function Resize-SingleLogfile { [cmdletbinding()] param( [Parameter(Mandatory=$true)] [String]$Path ,[Parameter(Mandatory=$true)] [int]$RowsToKeep ) Begin { If ( ( Test-Path -Path $Path -IsValid ) -eq $false ) { Write-Error -Message "The path '$( $Path )' is invalid." return } If ( ( Test-Path -Path $Path ) -eq $false ) { Write-Verbose -Message "Skipping '$( $Path )' - file does not exist yet." return } } Process { # Create a temporary file $tmpdir = Get-TemporaryPath $tempFile = Join-Path -Path $tmpdir -ChildPath "$( [guid]::newguid().toString() ).tmp" # Write only last lines to the new file Get-Content -Tail $RowsToKeep -Encoding utf8 -Path $Path | Set-Content -Path $tempFile -Encoding utf8 # Delete original file and replace with trimmed version Remove-Item -Path $Path Move-Item -Path $tempFile -Destination $Path Write-Verbose -Message "Resized '$( $Path )' to last $( $RowsToKeep ) lines" } } |