src/Resolve-CachedPackage.ps1
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function Resolve-CachedPackage { param( [Parameter(Mandatory)] $Bootstrapper, [Parameter(Mandatory)] [ValidateSet("Object","Install","File")] [string] $From, [Parameter(Mandatory)] $Options ) switch( $From ){ "Object" {} "Install" { # Check desired version against PackageManagement's local cache # Check desired version against NuGet (both stable and prerelease) # **Fallback** to internal local cache. <# **Reasoning: PackageManagement is to be prioritized. The purpose of this module is not to reproduce the efforts of PackageManagement - Import-Package's purpose is to patch in features that you would expect PackageManagement (PM) to include. One such feature is that at this time, PM's Install-Package doesn't support SemVer 2 while NuGet's Install-Package does. So, any package not installable by PM will be installed by Import-Package to an internal cache directory. - The reason for not using NuGet's Install-Package is that NuGet may or may not be installed on the target system. Additionally, any package imported using the -Path parameter will be cached here. The Import-Package module is also designed in such a way that if PM were to update from SemVer 1 to SemVer 2, PM packages will still be prioritized. In the long run, this will help reduce Import-Package's file bloat. #> $versions = @{} $versions.wanted = $Options.Version $versions.pm = @{} # Check for a locally installed version from PackageManagement (pm) # Also, cache the pm package in memory for faster loading, if it is available $pm_package = Get-Package $Options.Name -RequiredVersion (& { # Scripting the -RequiredVersion parameter is more performant than several calls to Get-Package If( [string]::IsNullOrWhiteSpace( $versions.wanted ) ){ $null } Else { $versions.wanted.ToString() } }) -ProviderName NuGet -ErrorAction SilentlyContinue $versions.pm.local = $pm_package.Version If( -not $Options.Offline ){ # Check for the upstream version (from NuGet) If( $Options.Stable ){ $versions.pm.upstream = Try { $Bootstrapper.GetLatest( $Options.Name ) } Catch {} } # If Options.Stable was false or an upstream stable version could not be found, try for a prerelease version If( [string]::IsNullOrWhiteSpace( "$( $versions.pm.upstream )" ) ){ $versions.pm.upstream = Try { $Bootstrapper.GetPreRelease( $Options.Name, $versions.wanted ) } Catch {} # If a prerelease was selected ensure $Options.Stable gets forced to false If( -not [string]::IsNullOrWhiteSpace( "$( $versions.pm.upstream )" ) ){ $Options.Stable = $false } } } $versions.cached = @{}; & { $root = $Options.CachePath $cached_packages = Join-Path $root "*" $cached_packages = Resolve-Path $cached_packages $cached_packages = Split-Path $cached_packages -Leaf # Get all cached packages with the same name $candidate_packages = $cached_packages | Where-Object { "$_" -like "$( $Options.Name )*" } If( $candidate_packages ){ # Get all versions in the directory $candidate_versions = $candidate_packages | ForEach-Object { # Exact replace (.Replace()) followed by regex-replace (-replace) $out = "$_".Replace( $Options.Name, "" ) -replace "^\.","" If( $out -eq $versions.wanted ){ $versions.cached.local = $out } $out } $candidate_versions = [string[]] $candidate_versions [Array]::Sort[string]( $candidate_versions, [System.Comparison[string]]({ param($x, $y) $x = ConvertTo-SemVerObject $x $y = ConvertTo-SemVerObject $y Compare-SemVerObject $x $y })) If( -not $versions.cached.local ){ $versions.cached.local = $candidate_versions | Select-Object -Last 1 } If(@( $PSCmdlet.MyInvocation.BoundParameters["Verbose"].IsPresent, ($VerbosePreference -ne 'SilentlyContinue') ) -contains $true ){ Write-Host Write-Verbose "[Import-Packge:Preparation] Detected cached packages for $( $Options.Name ) for versions:" $candidate_versions | ForEach-Object { If( $_ -eq $versions.cached.local ){ Write-Host ">" $_ -ForegroundColor Green } Else { Write-Host "-" $_ } } Write-Host Write-Host "> = either latest or selected version in cache" -ForegroundColor Green Write-Host } } } # At this point we have checked both the PM and Cached Packages for the desired version # We have also selected the latest from each in the case that the desired version was not found $no_local = -not (& { $versions.pm.local -or $versions.cached.local }) $no_upstream = -not (& { $versions.pm.upstream }) $versions.best = @{} If( -not $no_local ){ $versions.best.local = & { If( $versions.wanted ){ switch( $versions.wanted ){ $versions.pm.local { "pm"; break; } $versions.cached.local { "cached" } } } Elseif( $versions.pm.local ){ "pm" } Elseif( $versions.cached.local ){ "cached" } } } If( -not $no_upstream ){ $versions.best.upstream = & { "pm" } } If(@( $PSCmdlet.MyInvocation.BoundParameters["Verbose"].IsPresent, ($VerbosePreference -ne 'SilentlyContinue') ) -contains $true ){ Write-Host Write-Verbose "[Import-Packge:Preparation] Version control data for $( $Options.Name ):" Write-Host "Wanted version:" $versions.wanted -ForegroundColor (& { If( $versions.wanted ){ "Green" } Else { "DarkGray" } }) Write-Host Write-Host "No upstream:" $no_upstream -ForegroundColor Cyan "(if -offline is used, this should be True)" Write-Host "No local:" $no_local -ForegroundColor Cyan Write-Host Write-Host "Best local source:" $versions.best.local Write-Host "Best upstream source:" $versions.best.upstream Write-Host Write-Host "Cached version:" $versions.cached.local -ForegroundColor (& { If( $versions.best.local -eq "cached" ){ "Green" } Else { "DarkGray" } }) Write-Host "PM version:" $versions.pm.local -ForegroundColor (& { If( $versions.best.local -eq "pm" ){ "Green" } Else { "DarkGray" } }) Write-Host "Upstream version:" $versions.pm.upstream -ForegroundColor (& { If( $no_upstream ){ "DarkGray" } Else { "Magenta" } }) Write-Host } $install_condition = -not( $no_upstream ) -and (& { $no_local -or (& { $best_upstream = $versions[ $versions.best.upstream ].upstream $best_local = $versions[ $versions.best.local ].local $best_upstream -ne $best_local }) }) $Options.Source = If( $install_condition ){ If( $Options.Stable ){ Write-Verbose "[Import-Package:Preparation] Installing $( $Options.Name ) $( $versions[ $versions.best.upstream ].upstream )" Try { Install-Package $Options.Name ` -ProviderName NuGet ` -RequiredVersion $versions[ $versions.best.upstream ].upstream ` -SkipDependencies ` -Force ` -ErrorAction Stop | Out-Null } Catch { Install-Package $Options.Name ` -ProviderName NuGet ` -RequiredVersion $versions[ $versions.best.upstream ].upstream ` -SkipDependencies ` -Scope CurrentUser ` -Force | Out-Null } # Error check it and return it: $pm_package = Get-Package $Options.Name -RequiredVersion $versions[ $versions.best.upstream ].upstream -ProviderName NuGet -ErrorAction Stop If( $pm_package ){ $Options.Version = $versions[ $versions.best.upstream ].upstream $pm_package.Source } Else { throw "[Import-Package:Preparation] Autoinstall of $( $Options.Name ) $( $versions[ $versions.best.upstream ].upstream ) failed." } } Else { $Options.Version = $versions[ $versions.best.upstream ].upstream $package_name = "$( $Options.Name ).$( $Options.Version )" $output_path = Join-Path $Options.CachePath "$package_name" "$package_name.nupkg" Try{ Resolve-Path $output_path -ErrorAction Stop } Catch { $resource = $bootstrapper.APIs.resources| Where-Object { $_."@type" -eq "PackageBaseAddress/3.0.0" } $id = $resource."@id" $url = @( $id, $Options.Name, "/", $Options.Version, "/", $package_name, ".nupkg" ) -join "" If(@( $PSCmdlet.MyInvocation.BoundParameters["Verbose"].IsPresent, ($VerbosePreference -ne 'SilentlyContinue') ) -contains $true ){ Write-Verbose "[Import-Package:Preparation] Installed $( $Options.Name ) $( $Options.Version ) from:" Write-Host "-" $url -ForegroundColor Cyan Write-Host } New-Item (Split-Path $output_path) -Force -ItemType Directory | Out-Null Invoke-WebRequest -Uri $url -OutFile $output_path -ErrorAction Stop | Out-Null [System.IO.Compression.ZipFile]::ExtractToDirectory( $output_path, (Split-Path $output_path), $true ) | Out-Null $output_path } } } Elseif( -not( $no_local ) ){ $Options.Version = $versions[ $versions.best.local ].local If( $versions.best.local -eq "cached" ){ $package_name = "$( $Options.Name ).$( $Options.Version )" Join-Path $Options.CachePath "$package_name" "$package_name.nupkg" } Else { $pm_package.Source } } Else { throw "[Import-Package:Preparation] Could not retrieve any packages for $( $Options.Name )" } } "File" { $Options.Unmanaged = $true $Options.Offline = $true # This needs to be corrected by the .nuspec, if it is specified in the nuspec # Additionally, if the version is specifed in the .nuspec, it needs to be provided here $Options.Name = (Split-Path $Options.Source -LeafBase) $cache = Join-Path $Options.CachePath $Options.Name # Unpack the package to the cache directory If( -not( Test-Path $cache ) ){ [System.IO.Compression.ZipFile]::ExtractToDirectory( $Options.Source.ToString(), $cache.ToString() ) } $cache_nupkg = Join-Path $cache (Split-Path $Options.Source -Leaf) # Copy the nupkg to the cache directory as well If( -not( Test-Path $cache_nupkg ) ){ Copy-Item -Path $Options.Source.ToString() -Destination $cache -Force } $Options.Source = $cache_nupkg.ToString() } } } |