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Start-TypedDemo
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| # Script originally from: https://jdhitsolutions.com/blog/powershell/4445/simulating-a-powershell-demo/ | |
| # Slightly modified by @SimonWahlin | |
| Function Start-TypedDemo { | |
| <# | |
| .SYNOPSIS | |
| Simulate a PowerShell session | |
| .DESCRIPTION | |
| This command simulates an interactive PowerShell session. It will process a text file of PowerShell commands. The function will insert your prompt and "type" out each command when you press any key. At the end of the typed command or whenever a pipe character is inserted, the script will pause. Press Enter or any key to continue. | |
| If it is the end of the command pressing Enter will execute the command. Use the -NoExecute parameter to run through the demo without executing any commands. Commented lines will be skipped. Press 'q' or ESC at any pause to quit the demo. | |
| This function will NOT run properly in the ISE. | |
| VARIABLE NAMES | |
| Do not use any variables in your script file that are also used in this script. These are the variables you most likely need to avoid: | |
| $file | |
| $i | |
| $running | |
| $key | |
| $command | |
| $count | |
| MULITLINE COMMANDS | |
| To use a multiline command, in your demo file, put a :: before the first line and :: after the last line: | |
| Get-Date | |
| :: | |
| get-wmiobject win32_logicaldisk -filter "Drivetype=3" | | |
| Select Caption,VolumeName,Size,Freespace | | |
| format-table -autosize | |
| :: | |
| Get-Process | |
| The function will simulate a nested prompt. Press any key after the last >> to execute. Avoid using the line continuation character. | |
| TIMING | |
| By default the function will insert a random pause interval between characters. This is a random value in milliseconds between the -RandomMinimum and -RandomMaximum parameters which have default values of 50 and 140 respectively. | |
| If you want a static or consisent interval, then use the -Pause parameter. The recommended value is 80. | |
| TYPOS | |
| The -IncludeTypo parameter will introduce a typo at random intervals, then backspace over it and insert the correct text. You should not use this parameter with the -Transcript parameter. The transcript will have control characters for every backspace. | |
| It is not recommended to use -IncludeTypo when running any sort of transcript. | |
| SCOPE | |
| All the commands in your demo script are executed in the context of the Start-TypedDemo function. This means you have to be very aware of scope. While you can access items in the global scope like PSDrives, anything you create in the demo script will not persist. This also means that none of the commands in your demo script will show up in PowerShell history. | |
| COMMENTS | |
| Any line that begins with # will be treated as a comment and skipped. If you have a multi-line comment you will need to put a # at the begininng of each line. You can't use PowerShell's block comment characters. | |
| .PARAMETER File | |
| The file name of PowerShell commands to execute | |
| .PARAMETER RandomMinimum | |
| The minimum time interval between characters in milliseconds. The default is 50. | |
| .PARAMETER RandomMaximum | |
| The maximum time interval between characters in milliseconds. The default is 140. | |
| .PARAMETER IncludeTypo | |
| When specified, the function will simulate typing mistakes. It is not recommended to use this parameter with -Transcript. | |
| .PARAMETER Pause | |
| The typing speed interval between characters in milliseconds. The recommended value is 100. | |
| .PARAMETER Transcript | |
| The file name and path for a transcript session file. Existing files will be overwritten. It is not recommended to use this parameter with -IncludeTypo. | |
| .PARAMETER NoExecute | |
| Do not execute any of the commands. | |
| .PARAMETER NewSession | |
| Simulate a new PowerShell session with the copyright header and a prompt. This works best if you start your demo from the C: drive. | |
| .PARAMETER PSVersion | |
| Use this to when simulating a new PowerShell session to depict a specific PowerShell version | |
| . The default is your current version. | |
| .EXAMPLE | |
| PS C:\> Start-TypedDemo c:\work\demo.txt | |
| Run the commands in c:\work\demo.txt using the random defaults | |
| .EXAMPLE | |
| PS C:\> Start-TypedDemo c:\work\demo.txt -pause 100 -NoExecute | |
| Run the commands in c:\work\demo.txt using a static interval of 100 milliseconds. The function will only type the commands. They will not be executed. | |
| .EXAMPLE | |
| PS C:\> Start-TypedDemo c:\work\demo.txt -transcript c:\work\demotrans.txt | |
| Run the commands in c:\work\demo.txt using the random defaults and create a transcript file. | |
| .NOTES | |
| NAME : Start-TypedDemo | |
| VERSION : 5.0 | |
| LAST UPDATED: 7/13/2015 | |
| AUTHOR : Jeffery Hicks | |
| This function was first published at http://jdhitsolutions.com/blog/scripting/1473/friday-fun-start-typeddemo-v2/ | |
| Learn more about PowerShell: | |
| http://jdhitsolutions.com/blog/essential-powershell-resources/ | |
| **************************************************************** | |
| * DO NOT USE IN A PRODUCTION ENVIRONMENT UNTIL YOU HAVE TESTED * | |
| * THOROUGHLY IN A LAB ENVIRONMENT. USE AT YOUR OWN RISK. IF * | |
| * YOU DO NOT UNDERSTAND WHAT THIS SCRIPT DOES OR HOW IT WORKS, * | |
| * DO NOT USE IT OUTSIDE OF A SECURE, TEST SETTING. * | |
| **************************************************************** | |
| .LINK | |
| Write-Host | |
| Invoke-Command | |
| Start-Sleep | |
| Get-Random | |
| .INPUTS | |
| None | |
| .OUTPUTS | |
| None. This only writes to the host console, not the pipeline. | |
| #> | |
| [cmdletBinding(DefaultParameterSetName = "Random")] | |
| Param( | |
| [Parameter(Position = 0, Mandatory = $True, HelpMessage = "Enter the name of a text file with your demo commands")] | |
| [ValidateScript( { Test-Path $_ })] | |
| [string]$File, | |
| [ValidateScript( { $_ -gt 0 })] | |
| [Parameter(ParameterSetName = "Static")] | |
| [int]$Pause = 80, | |
| [Parameter(ParameterSetName = "Random")] | |
| [ValidateScript( { $_ -gt 0 })] | |
| [int]$RandomMinimum = 50, | |
| [Parameter(ParameterSetName = "Random")] | |
| [ValidateScript( { $_ -gt 0 })] | |
| [int]$RandomMaximum = 140, | |
| [switch]$PauseAtPipeChar, | |
| [switch]$PauseBeforeExecute, | |
| [Parameter(ParameterSetName = "Random")] | |
| [switch]$IncludeTypo, | |
| [string]$Transcript, | |
| [switch]$NoExecute, | |
| [switch]$NewSession, | |
| [ValidateSet(2, 3, 4, 5)] | |
| [Int]$PSVersion = $PSVersionTable.PsVersion.MajorVersion | |
| ) | |
| #this is an internal function so I'm not worried about the name | |
| Function PauseIt { | |
| [cmdletbinding()] | |
| Param() | |
| Write-Verbose "PauseIt" | |
| #wait for a key press | |
| $Running = $true | |
| #keep looping until a key is pressed | |
| While ($Running) { | |
| #if ($host.ui.RawUi.KeyAvailable) { | |
| $key = $host.ui.RawUI.ReadKey("NoEcho,IncludeKeyDown") | |
| if ($key) { | |
| $Running = $False | |
| #check the value and if it is q or ESC, then bail out | |
| if ($key -match "q|27") { | |
| Write-Host "`r" | |
| Return "quit" | |
| } #if match q|27 | |
| } #if $key | |
| #} #if key available | |
| Start-Sleep -millisecond 100 | |
| } #end While | |
| } #PauseIt function | |
| #abort if running in the ISE | |
| if ($host.name -match "PowerShell ISE") { | |
| Write-Warning "This will not work in the ISE. Use the PowerShell console host." | |
| Return | |
| } | |
| Clear-Host | |
| if ($NewSession) { | |
| #simulate a new v3 session | |
| #define a set of coordinates | |
| $z = new-object System.Management.Automation.Host.Coordinates 0, 0 | |
| Switch ($PSVersion) { | |
| 2 { $year = 2009 } | |
| 3 { $year = 2012 } | |
| 4 { $year = 2013 } | |
| 5 { $year = 2015 } | |
| } | |
| $header = @" | |
| Windows PowerShell | |
| Copyright (C) $YEAR Microsoft Corporation. All rights reserved. | |
| `r | |
| "@ | |
| Write-Host $header | |
| } #if new session | |
| #Start a transcript if requested | |
| $RunningTranscript = $False | |
| if ($Transcript) { | |
| Try { | |
| Start-Transcript -Path $Transcript -ErrorAction Stop | Out-Null | |
| $RunningTranscript = $True | |
| } | |
| Catch { | |
| Write-Warning "Could not start a transcript. One may already be running." | |
| } | |
| } | |
| #strip out all comments and blank lines | |
| Write-Verbose "Getting commands from $file" | |
| $commands = Get-Content -Path $file | Where-Object { $_ -notmatch "#" -AND $_ -match "\w|::|{|}|\(|\)" } | |
| $count = 0 | |
| #write a prompt using your current prompt function | |
| Write-Verbose "prompt" | |
| Write-Host $(prompt) -NoNewline | |
| $NoMultiLine = $True | |
| $StartMulti = $False | |
| #define a scriptblock to get typing interval | |
| Write-Verbose "Defining interval scriptblock" | |
| $interval = { | |
| if ($pscmdlet.ParameterSetName -eq "Random") { | |
| #get a random pause interval | |
| Get-Random -Minimum $RandomMinimum -Maximum $RandomMaximum | |
| } | |
| else { | |
| #use the static pause value | |
| $Pause | |
| } | |
| } #end Interval scriptblock | |
| #typo scriptblock | |
| Write-Verbose "Defining typo scriptblock" | |
| $Typo = { | |
| #an array of characters to use for typos | |
| $matrix = "a", "s", "d", "f", "x", "q", "w", "e", "r", "z", "j", "t", "x", "c", "v", "b" | |
| #Insert a random bad character | |
| Write-host "$($matrix | .\Get-RandomPassword.ps1) " -nonewline | |
| Start-Sleep -Milliseconds 500 | |
| #simulate backspace | |
| Write-host `b -NoNewline | |
| start-sleep -Milliseconds 300 | |
| Write-host `b -NoNewline | |
| start-sleep -Milliseconds 200 | |
| Write-Host $command[$i] -NoNewline | |
| } #end Typo Scriptblock | |
| Write-Verbose "Defining PipeCheck Scriptblock" | |
| #define a scriptblock to pause at a | character in case an explanation is needed | |
| $PipeCheck = { | |
| if ($command[$i] -eq "|") { | |
| If ((PauseIt) -eq "quit") { Return } | |
| } | |
| } #end PipeCheck scriptblock | |
| Write-Verbose "Processing commands" | |
| foreach ($command in $commands) { | |
| #trim off any spaces | |
| $command = $command.Trim() | |
| $count++ | |
| #pause until a key is pressed which will then process the next command | |
| if ($NoMultiLine) { | |
| If ((PauseIt) -eq "quit") { Return } | |
| } | |
| #SINGLE LINE COMMAND | |
| if ($command -ne "::" -AND $NoMultiLine) { | |
| Write-Verbose "single line command" | |
| for ($i = 0; $i -lt $command.length; $i++) { | |
| #simulate errors if -IncludeTypo | |
| if ($IncludeTypo -AND ($(&$Interval) -ge ($RandomMaximum - 5))) | |
| { &$Typo } #if includetypo | |
| else { | |
| #write the character | |
| Write-Verbose "Writing character $($command[$i])" | |
| Write-Host $command[$i] -NoNewline | |
| } | |
| #insert a pause to simulate typing | |
| Start-sleep -Milliseconds $(&$Interval) | |
| if ($PauseAtPipeChar.IsPresent) { | |
| &$PipeCheck | |
| } | |
| } | |
| #remove the backtick line continuation character if found | |
| if ($command.contains('`')) { | |
| $command = $command.Replace('`', "") | |
| } | |
| if ($PauseBeforeExecute.IsPresent) { | |
| #Pause until ready to run the command | |
| If ((PauseIt) -eq "quit") { Return } | |
| } | |
| Write-host "`r" | |
| #execute the command unless -NoExecute was specified | |
| if (-NOT $NoExecute) { | |
| Invoke-Expression $command | Out-Default | |
| } | |
| else { | |
| Write-Host $command -ForegroundColor Cyan | |
| } | |
| } #IF SINGLE COMMAND | |
| #START MULTILINE | |
| #skip the :: | |
| elseif ($command -eq "::" -AND $NoMultiLine) { | |
| $NoMultiLine = $False | |
| $StartMulti = $True | |
| #define a variable to hold the multiline expression | |
| [string]$multi = "" | |
| } #elseif | |
| #FIRST LINE OF MULTILINE | |
| elseif ($StartMulti) { | |
| for ($i = 0; $i -lt $command.length; $i++) { | |
| if ($IncludeTypo -AND ($(&$Interval) -ge ($RandomMaximum - 5))) | |
| { &$Typo } | |
| else { write-host $command[$i] -NoNewline } #else | |
| start-sleep -Milliseconds $(&$Interval) | |
| #only check for a pipe if we're not at the last character | |
| #because we're going to pause anyway | |
| if ($i -lt $command.length - 1) { | |
| if ($PauseAtPipeChar.IsPresent) { | |
| &$PipeCheck | |
| } | |
| } | |
| } #for | |
| $StartMulti = $False | |
| #remove the backtick line continuation character if found | |
| if ($command.contains('`')) { | |
| $command = $command.Replace('`', "") | |
| } | |
| #add the command to the multiline variable | |
| $multi += " $command" | |
| # if (!$command.Endswith('{')) { $multi += ";" } | |
| if ($command -notmatch ",$|{$|}$|\|$|\($") { $multi += " ; " } | |
| if ($PauseBeforeExecute.IsPresent) { | |
| If ((PauseIt) -eq "quit") { Return } | |
| } | |
| } #elseif | |
| #END OF MULTILINE | |
| elseif ($command -eq "::" -AND !$NoMultiLine) { | |
| Write-host "`r" | |
| Write-Host ">> " -NoNewline | |
| $NoMultiLine = $True | |
| if ($PauseBeforeExecute.IsPresent) { | |
| If ((PauseIt) -eq "quit") { Return } | |
| } | |
| #execute the command unless -NoExecute was specified | |
| Write-Host "`r" | |
| if (-NOT $NoExecute) { | |
| Invoke-Expression $multi | Out-Default | |
| } | |
| else { | |
| Write-Host $multi -ForegroundColor Cyan | |
| } | |
| } #elseif end of multiline | |
| #NESTED PROMPTS | |
| else { | |
| Write-Host "`r" | |
| Write-Host ">> " -NoNewLine | |
| If ((PauseIt) -eq "quit") { Return } | |
| for ($i = 0; $i -lt $command.length; $i++) { | |
| if ($IncludeTypo -AND ($(&$Interval) -ge ($RandomMaximum - 5))) | |
| { &$Typo } | |
| else { Write-Host $command[$i] -NoNewline } | |
| Start-Sleep -Milliseconds $(&$Interval) | |
| if ($PauseAtPipeChar.IsPresent) { | |
| &$PipeCheck | |
| } | |
| } #for | |
| #remove the backtick line continuation character if found | |
| if ($command.contains('`')) { | |
| $command = $command.Replace('`', "") | |
| } | |
| #add the command to the multiline variable and include the line break | |
| #character | |
| $multi += " $command" | |
| # if (!$command.Endswith('{')) { $multi += ";" } | |
| if ($command -notmatch ",$|{$|\|$|\($") { | |
| $multi += " ; " | |
| #$command | |
| } | |
| } #else nested prompts | |
| #reset the prompt unless we've just done the last command | |
| if (($count -lt $commands.count) -AND ($NoMultiLine)) { | |
| Write-Host $(prompt) -NoNewline | |
| } | |
| } #foreach | |
| #stop a transcript if it is running | |
| if ($RunningTranscript) { | |
| #stop this transcript if it is running | |
| Stop-Transcript | Out-Null | |
| } | |
| } #function | |
| #uncomment if you want to use the alias | |
| #Set-Alias -Name std -Value Start-TypedDemo |
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