Private/Get-SpecInstalledModule.ps1
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function Get-SpecInstalledModule { [cmdletbinding()] param ( [string]$module, [string]$version ) $installed = $false # query system to see if module is installed (any version) $result = get-module -Name $module -ListAvailable | sort version -Descending # module not installed at all if ([string]::IsNullOrEmpty($result)) { write-verbose "Module [$module] is not installed on this system" return $false } # module installed, but no specific version requested. # so let's return the latest installed version if ([string]::IsNullOrEmpty($version)) { $installedVersion = ($result | Sort-Object Version -Descending | Select-Object -First 1).version write-verbose "The module [$module] has been found on this system. Returning the version number [$installedVersion]" return $installedVersion } # Module installed but a specific version has been requested # so let's check if any of the installed version(s) are the requested version if ($version) { foreach ($Ver in $result) { if ($Ver.version -eq $version) { write-verbose "The installed version of [$module] matches the requested version of [$version]" $installedVersion = $ver.Version $installed = $true break } } } if ($installed) { write-verbose "The installed version of [$module] is at the required level [$installedVersion] " return $installedVersion } else { write-verbose "Module [$module] requires installing" return $false } } |