48 lines
1.6 KiB
PowerShell
48 lines
1.6 KiB
PowerShell
function Select-UniqueServerPackages {
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<#
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.SYNOPSIS
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Given a list of package lists (ie per server), this function returns the unique packages from each list of packages.
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If there is a higher version of a package in one package list than another, the higher version is preferred.
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.PARAMETER PackagesArray
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Array of packages to process
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#>
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[CmdletBinding()]
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param (
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[array]$PackagesArray
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)
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if (Test-IsCollectionNullOrEmpty $PackagesArray) {
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Write-Verbose "Array was null."
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return $null
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}
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if ($PackagesArray.Count -eq 1) {
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Write-Verbose "Only one value in array. Returning it."
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return $PackagesArray[0]
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}
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# Determine the combined unique list of packages.
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Write-Verbose "Looping through packages..."
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$uniquePackages = @{ }
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foreach ($packages in $PackagesArray) {
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if ($null -eq $packages) {
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continue
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}
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foreach ($package in $packages) {
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$name = $package.Name.ToLower()
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if (!($uniquePackages.ContainsKey($name))) {
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# If this package is not in the unique package list, add it!
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Write-Verbose "Found a package: $package"
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$uniquePackages[$name] = $package
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} elseif ($package.Version -gt $uniquePackages[$name].Version) {
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# Otherwise if the version of the package on this server is greater than what is stored, prefer the higher version.
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Write-Verbose "Found a package again! $package"
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$uniquePackages[$name] = $package
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}
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}
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}
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Write-Verbose "Returning unique values."
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return $uniquePackages.Values
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} |