54 lines
1.6 KiB
PowerShell
54 lines
1.6 KiB
PowerShell
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function Select-InstallPackages {
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<#
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.SYNOPSIS
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Overwrites packages that share the same from the first list, with the second list.
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Makes sure everything in the second list is in the result.
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Used for overwriting the packages from the environment with packages intended to be installed.
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Used during a full deploy
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.PARAMETER Packages
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The list of packages currently installed in an environment
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.PARAMETER InstallPackages
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The list of packages to be installed in an environment.
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#>
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[CmdletBinding()]
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param (
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[array]$Packages,
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[array]$InstallPackages
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)
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# Strip null entries out of the packages.
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$Packages = $Packages | Where-Object { $null -ne $_ }
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$InstallPackages = $InstallPackages | Where-Object { $null -ne $_ }
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# Just return the original list if the install packages are null/empty.
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if (Test-IsCollectionNullOrEmpty $InstallPackages) {
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return $Packages
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}
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# Load the install packages into a map for quick lookup.
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$installMap = @{ }
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foreach ($package in $InstallPackages) {
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$installMap[$package.Name.ToLower()] = $package
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}
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# If the package name exists in $installPackages, overwrite the package from $packages.
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$result = @()
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foreach ($package in $Packages) {
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$name = $package.Name.ToLower()
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if ($installMap.ContainsKey($name)) {
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$result += $installMap[$name]
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$installMap.Remove($name)
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} else {
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$result += $package
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}
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}
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# Anything left in $installMap is a new package. Add them in.
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if ($installMap.Count -gt 0) {
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$result += $installMap.Values
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}
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return $result
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}
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