Created
November 13, 2015 14:25
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Proxy commands for Get-WmiObject and Get-CimInstance that support PowerShell query syntax via 'PowerShellFilter' paramater
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foreach ($command in ('Get-WmiObject','Get-CimInstance')){ | |
$Metadata = New-Object System.Management.Automation.CommandMetaData (Get-Command $command) | |
$proxyCmd = [System.Management.Automation.ProxyCommand]::Create($Metadata) #| clip | |
if ($command -eq 'Get-WmiObject'){ | |
$newParam = @' | |
[Parameter(ParameterSetName='query')] | |
[ScriptBlock] | |
$PowerShellFilter, | |
'@ | |
} | |
else{ | |
$newParam = @' | |
[Parameter(ParameterSetName='ResourceUriComputerSet')] | |
[Parameter(ParameterSetName='ResourceUriSessionSet')] | |
[Parameter(ParameterSetName='ClassNameComputerSet')] | |
[Parameter(ParameterSetName='ClassNameSessionSet')] | |
[ScriptBlock] | |
$PowerShellFilter, | |
'@ | |
} | |
$proxyCmd = $proxyCmd.Insert($proxyCmd.IndexOf('param(')+7,$newParam) | |
$newCode = @' | |
if ($PSBoundParameters.ContainsKey('PowerShellFilter')){ | |
$errors = $tokens = $null | |
$AST= [Management.Automation.Language.Parser]::ParseInput($PowerShellFilter, [ref]$tokens, [ref]$errors) | |
$tokens = $tokens | where { $_.Text -and $_.Name -ne '_' -and $_.Kind -ne 'Dot' } | |
$htReplacements = @" | |
eq = = | |
lt = < | |
gt = > | |
le = <= | |
ge = >= | |
ne = != | |
like = like | |
and = and | |
or = or | |
is = is | |
isnot = is not | |
"@ | ConvertFrom-StringData | |
$wql = foreach ($token in $tokens) { | |
switch($token){ | |
{ $_.Value -ne $null } { "'$(([Management.Automation.WildcardPattern]$_.Value).ToWql())'"; break } | |
{ $_.Kind -eq 'Parameter' } { $htReplacements."$($_.ParameterName)"; break } | |
{ [string]$_.TokenFlags -like '*BinaryOperator*' } { $htReplacements."$($_.Text.Replace('-',''))"; break } | |
{ $_.Kind -eq 'Variable' } { "'$(Get-Variable $_.Name -ValueOnly)'"; break } | |
Default { $_.Text } | |
} | |
} | |
$null = $PSBoundParameters.Add('Filter',($wql -join ' ')) | |
$null = $PSBoundParameters.Remove('PowerShellFilter') | |
} | |
'@ | |
$proxyCmd = $proxyCmd.Insert($proxyCmd.IndexOf("['OutBuffer'] = 1")+28,$newCode) | |
Set-Item -Path function:$command -Value ([ScriptBlock]::Create($proxyCmd)) | |
} |
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