Sync NuGet package versions among projects

SyncNugetVersions.ps1

## WARNING: This is a one of hack that is saved for further refinement if needed in future

$Projects = Get-ChildItem . -Recurse -Filter *.csproj

$Packages = @{}

foreach ($Project in $Projects) {
    [Regex]::Matches((Get-Content -Raw $Project.FullName), '<PackageReference\s+Include="(?<name>[^"]+)"\s+Version="(?<version>[^"]+)"') |
        ForEach-Object {
            if (-not $Packages.ContainsKey($_.Groups['name'].Value)) {
                $Packages.Add($_.Groups['name'].Value, (New-Object System.Collections.Generic.HashSet[string]))
            }

            $Packages[$_.Groups['name'].Value].Add($_.Groups['version'].Value) | Out-Null
        }
}

$Highest = @{}

$Packages.Keys |
    Where-Object { $Packages[$_].Count -gt 1} |
    ForEach-Object {
        Write-Host "${_}: $($Packages[$_])"
        $version = $Packages[$_] |
            ForEach-Object {
                [string]::Join('.', ($_.Split('.') | ForEach-Object {$_.PadLeft(3,'0')}))
            } |
            Sort-Object -Descending |
            Select -First 1 |
            Foreach-Object {
                [string]::Join('.', ($_.Split('.') | ForEach-Object {$_.TrimStart('0').PadLeft(1, '0')}))
            }

        $Highest.Add($_, $version)
    }

foreach ($Project in $Projects) {
    $content = Get-Content -Raw $Project.FullName

    foreach ($ref in $Highest.Keys) {
        [Regex]::Matches((Get-Content -Raw $Project.FullName), "<PackageReference\s+Include=`"$ref`"\s+Version=`"[^`"]+`"") |
        ForEach-Object {
            Write-Host "<PackageReference Include=`"$ref`" Version=`"$($Highest[$ref])`""
            $content = $content.Replace($_.Value, "<PackageReference Include=`"$ref`" Version=`"$($Highest[$ref])`"")
        }
    }

    $content.Trim() | Out-File -FilePath $Project.FullName -Encoding utf8NoBOM
}