Show-Demo.ps1
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function Show-Demo { <# .SYNOPSIS Shows a Demo .DESCRIPTION Shows a PowerShell Demo Script. .EXAMPLE Show-Demo .LINK Get-Demo #> [Alias('Start-Demo')] [CmdletBinding(DefaultParameterSetName='LoadedDemos')] param( # The name of the demo [Parameter(ValueFromPipelineByPropertyName,ParameterSetName='LoadedDemos')] [string] $DemoName, # The path to the demo file. [Parameter(Mandatory,ValueFromPipelineByPropertyName,ParameterSetName='DemoFile')] [Alias('FullName', 'DemoFile', 'File', 'Source')] $DemoPath, # A Demo Script block. [Parameter(Mandatory,ValueFromPipeline,ParameterSetName='DemoScript')] [scriptblock] $DemoScript, # The name of the chapter [string] $Chapter, # The current step (within -Chapter) [ValidateRange(1,10000)] [int] $Step, # The typing style. Can be letters, words, or none. [ValidateSet('Letters','Words','None')] [string] $TypeStyle = 'Letters', # If this is an integer less than 10000, it will be considered 'words per minute' # Otherwise, this will be the timespan to wait between words / letters being displayed. [timespan] $TypeSpeed, # The amount of time to wait between each step. # If provided, implies -AutoPlay. [Alias('PauseBetweenSteps')] [timespan] $PauseBetweenStep, # If set, will automatically play demos. # Use -PauseBetweenStep to specify how long to wait between each step. [switch] $AutoPlay, # If set, will make the demo noniteractive. [switch] $NonInteractive ) process { $demoFile = if ($DemoPath) { Get-Demo -DemoPath $DemoPath } elseif ($DemoScript) { Get-Demo -DemoScript $DemoScript } elseif ($DemoName) { Get-Demo -DemoName $DemoName } else { $allDemos = Get-Demo $justNamedDemo = $allDemos | Where-Object Name -eq 'Demo' | Select-Object -First 1 if (-not $justNamedDemo) { $allDemos | Select-Object -First 1 } else { $justNamedDemo } } if (-not $demoFile) { Write-Error "No demo to show" } if ($chapter) { $demoFile | Add-Member CurrentChapter $Chapter -Force } if ($step) { $demoFile | Add-Member CurrentStep $step -Force } $demoFile | Add-Member TypeStyle $TypeStyle -Force if ($TypeStyle -eq 'Letters' -and -not $TypeSpeed) { $TypeSpeed = [timespan]::FromMilliseconds(1) } elseif ($TypeStyle -eq 'Words' -and -not $TypeSpeed) { $TypeSpeed = [timespan]::FromMilliseconds(30) } $demoFile | Add-Member TypeSpeed $TypeSpeed -Force if ($NonInteractive -or ($Host.Name -eq 'Default Host') -or $env:BUILD_ID -or $env:GITHUB_WORKSPACE ) { $demoFile | Add-Member Interactive $false -Force } else { $demoFile | Add-Member Interactive $true -Force } if ($AutoPlay -or $PauseBetweenStep.TotalMilliseconds) { if (-not $PauseBetweenStep.TotalMilliseconds) { $PauseBetweenStep = [timespan]::FromMilliseconds(500) } $demoFile | Add-Member Autoplay $true -Force $demoFile | Add-Member PauseBetweenStep $PauseBetweenStep -Force } if ($NonInteractive) { $demoFile | Format-Custom | Out-String -Width 1mb } else { $demoFile | Format-Custom } } } |