Internal/Invoke-RScript.ps1
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function Invoke-RScript { <# .SYNOPSIS Invokes a RScript command .PARAMETER ArgumentList Specifies the arguments that are passed to RScript. All arguments are casted to string. #> [CmdletBinding()] param ( [Parameter( Mandatory )] [string[]] $ArgumentList, [Parameter(Mandatory=$true)] [ValidateNotNull()] [int] $Timeout, [switch] $ParseOutput ) if ( -not $RScriptPath ) { throw 'Path to Rscript.exe is not net. Please run Set-RScriptPath.' } elseif ( -not ( Test-Path $RScriptPath -PathType Leaf )) { throw 'Path to Rscript.exe is invalid. Please re-run Set-RScriptPath.' } $arguments = $ArgumentList | ForEach-Object { Write-Output '-e' Write-Output """$( $_.Replace('"', '\"') )""" } # Configure process $process = New-Object System.Diagnostics.Process $process.StartInfo.Filename = $RScriptPath $process.StartInfo.Arguments = $arguments $process.StartInfo.WorkingDirectory = Get-Location $process.StartInfo.RedirectStandardOutput = $true $process.StartInfo.RedirectStandardError = $true $process.StartInfo.UseShellExecute = $false $process.StartInfo.CreateNoWindow = $true # Connect output events $standardOutputBuffer = New-Object System.Collections.SortedList $standardErrorBuffer = New-Object System.Collections.SortedList $EventAction = { if ( -not [String]::IsNullOrEmpty( $EventArgs.Data )) { $Event.MessageData.Add( $event.EventIdentifier, $EventArgs.Data ) | Out-Null Write-Verbose $EventArgs.Data } } $outputEvent = Register-ObjectEvent -InputObject $process ` -EventName 'OutputDataReceived' -Action $EventAction -MessageData $standardOutputBuffer $errorEvent = Register-ObjectEvent -InputObject $process ` -EventName 'ErrorDataReceived' -Action $EventAction -MessageData $standardErrorBuffer try { $processCall = "$( $process.StartInfo.FileName ) $( $process.StartInfo.Arguments )" if ( $processCall.Length -ge 250 ) { $processCall = "$( $processCall.Substring(252) )..." } Write-Verbose "Process started: $processCall" $process.Start() | Out-Null $process.BeginOutputReadLine() $process.BeginErrorReadLine() # Wait for exit if ( $Timeout ) { $process.WaitForExit( $Timeout * 1000 ) | Out-Null } $process.WaitForExit() | Out-Null # Ensure streams are flushed Write-Verbose "Process exited (code $( $process.ExitCode )) after $( $process.TotalProcessorTime )." } finally { Unregister-Event -SourceIdentifier $outputEvent.Name Unregister-Event -SourceIdentifier $errorEvent.Name } $lineIndex = 1 # Process output if ( $standardOutputBuffer.Count ) { if ( $ParseOutput ) { $standardOutputBuffer.Values | ForEach-Object { $prefix = "[$lineIndex] " if ( $_.StartsWith( $prefix ) ) { $lineIndex += 1 Write-Output $_.Substring( $prefix.Length ).Trim() } } } else { $standardOutput = $standardOutputBuffer.Values -join "`r`n" Write-Output $standardOutput } } else { Write-Verbose 'No process output' } # process error if ( $standardErrorBuffer.Count ) { foreach ( $line in $standardErrorBuffer.Values ) { if ( $line ) { Write-Warning $line -ErrorAction 'Continue' } } } else { Write-Verbose 'No process error output' } if ( $process.ExitCode ) { throw "Proccess failed ($processCall) after $( $process.TotalProcessorTime )." } elseif ( $Timeout -gt 0 -and $process.TotalProcessorTime.TotalSeconds -ge $Timeout ) { throw "Process timed out ($processCall) after $( $process.TotalProcessorTime )." } } |