Functions/Get-PSVersion.ps1
|
function Get-PSVersion { <# .SYNOPSIS Maps information from $PSVersionTable to a mapping table to retrieve friendly names for Windows PowerShell build numbers .DESCRIPTION Get-PSVersion is a function to map information from $PSVersionTable to a mapping table in order to retrieve friendly names for Windows PowerShell build numbers. For example, if the build number is 5.0.10586.117, the returned friendly name will be 'Windows PowerShell 5 RTM 1512'. For remote computers, the function relies on PowerShell remoting. By default a mapping table bundled with the module is used a data source. The switch parameter -UpdatePSVersionData can be used to download the latest version. A useful tip is to use a scheduled job to automatically update both the PSVersion module and the PSVersionData: $ScheduledJobOption = New-ScheduledJobOption -RunElevated $Trigger = New-JobTrigger -At 03:00:00 -Daily Register-ScheduledJob -Name Update-PSVersion -ScriptBlock { Update-Module -Name PSVersion -Force Import-Module -Name PSVersion Update-PSVersionData } -Trigger $Trigger -ScheduledJobOption $ScheduledJobOption -RunNow .PARAMETER ComputerName The remote computer(s) to retrieve PowerShell version information from. .PARAMETER Credential Specifies a user account that has permission to perform this action. The default is the current user. .PARAMETER UpdatePSVersionData Triggers the Update-PSVersionData function which will update the PowerShell version mapping table .EXAMPLE Get-PSVersion .EXAMPLE Get-PSVersion -UpdatePSVersionData .EXAMPLE Get-PSVersion -ComputerName 'ComputerA','ComputerB' .EXAMPLE 'ComputerA','ComputerB | Get-PSVersion .EXAMPLE Get-PSVersion -ComputerName 'ComputerA','ComputerB -Credential (Get-Credential) .EXAMPLE Get-ADComputer -Filter 'operatingsystem -like "*Server*"' | Select-Object -ExpandProperty Name | Sort-Object -Property Name | Get-PSVersion .INPUTS String .OUTPUTS Selected.System.Collections.Hashtable System.Management.Automation.PSCustomObject .NOTES Author: Jan Egil Ring Twitter: @JanEgilRing #> [CmdletBinding()] param ( [Parameter(Mandatory=$false, ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true )] [string[]]$ComputerName=$env:computername, [System.Management.Automation.Credential()]$Credential = [System.Management.Automation.PSCredential]::Empty, [switch]$UpdatePSVersionData, [parameter(ParameterSetName = "ListVersion")] [switch]$ListVersion ) BEGIN { $Params = @{} If ($PSBoundParameters['Credential']) { $Params.Credential = $Credential } If ($PSBoundParameters['UpdatePSVersionData']) { Update-PSVersionData -ErrorAction SilentlyContinue } $functionpath = Split-Path -Path ${function:Get-PSVersion}.File $modulepath = Split-Path -Path $functionpath $mappingtablemodulepath = Join-Path -Path $modulepath -ChildPath 'PSVersionMappingTable.json' $mappingtableappdatapath = Join-Path -Path $env:LOCALAPPDATA\Microsoft\Windows\PowerShell -ChildPath 'PSVersionMappingTable.json' if (Test-Path -Path $mappingtableappdatapath) { Write-Verbose -Message "Found $mappingtableappdatapath, using this version..." $mappingtablepath = $mappingtableappdatapath } else { Write-Verbose -Message "$mappingtableappdatapath not found, using the mapping table which is bundled with the module..." $mappingtablepath = $mappingtablemodulepath } $mappingtable = Get-Content -Path $mappingtablepath -Raw | ConvertFrom-Json If ($PSBoundParameters['ListVersion']) { Write-Verbose -Message "Parameter Set: ListVersion" Write-Verbose -Message "mappingtablepath: $mappingtablepath" return $mappingtable break } $ComputerNames = @() } PROCESS { $ComputerNames += $ComputerName } END { If (-not ($PSBoundParameters['ComputerName']) -or $ComputerName -eq $env:computername -or $ComputerName -eq '127.0.0.1' -or $ComputerName -eq 'localhost' -or $ComputerName -eq '.') { Write-Verbose -Message 'Parameter -ComputerName not specified, skipping PS Remoting and retriving information from localhost directly from $PSVersionTable' $PSVersion = $PSVersionTable.PSVersion.ToString() $FriendlyName = ($mappingtable | Where-Object {$_.Name -eq $PSVersion}).FriendlyName if (-not ($FriendlyName)) { Write-Verbose -Message 'FriendlyName not found in mappingtable, trying to update the local mapping table using Update-PSVersionData...' Update-PSVersionData -ErrorAction SilentlyContinue $mappingtable = Get-Content -Path $mappingtablepath -Raw | ConvertFrom-Json $FriendlyName = ($mappingtable | Where-Object {$_.Name -eq $PSVersion}).FriendlyName if (-not ($FriendlyName)) { Write-Verbose -Message 'FriendlyName still not found in mappingtable, setting value to Unknown' $FriendlyName = "Unknown $($_.PSVersion)" } else { Write-Verbose -Message 'FriendlyName found after calling Update-PSVersionData' } } $output = [pscustomobject]@{ PSComputerName = $env:ComputerName PSVersion = $PSVersionTable.PSVersion.ToString() PSVersionFriendlyName = $FriendlyName } return $output } $Params.ComputerName = $ComputerNames Invoke-Command @Params { $PSVersionTable } -ErrorAction SilentlyContinue -ErrorVariable failed | Select-Object @{Name='PSComputerName';e={$_.PSComputerName}},@{Name='PSVersion';e={$_.PSVersion.ToString()}},@{Name='PSVersionFriendlyName';e={ $PSVersion = $_.PSVersion.ToString() $FriendlyName = ($mappingtable | Where-Object {$_.Name -eq $PSVersion}).FriendlyName if ($FriendlyName) { $FriendlyName } else { "Unknown $($_.PSVersion)" } } } if ($failed) { foreach ($item in $failed) { [pscustomobject]@{ PSComputerName = $item.TargetObject PSVersion = $null PSVersionFriendlyName = 'N/A - PS Remoting failed' } } } } } |