pkgconf - NuGet package.config fragmentation evaluator

gistfile1.ps1

$ErrorActionPreference = "Stop"

$dict_type = "system.collections.generic.dictionary"
$set_type = "system.collections.generic.hashset"

# project -> package id -> version
$projectToPackageVersion = @{}

# package id -> version -> project
$packageToVersionToProjects = @{}

$configResults = Get-ChildItem -Filter packages.config -Recurse
foreach ($configResult in $configResults) {
    $configPath = $configResult.FullName
    $project = $configResult.Directory.Name

    $contents = [IO.File]::ReadAllText($configPath)

    $projectToPackageVersion[$project] = @{}
    $contents | Select-Xml '//package' | %{
        $packageId = $_.Node.id
        $version = $_.Node.version

        if (-not $packageToVersionToProjects.ContainsKey($packageId)) {
            $packageToVersionToProjects[$packageId] = @{}
        }

        if (-not $packageToVersionToProjects[$packageId].ContainsKey($version)) {
            $packageToVersionToProjects[$packageId][$version] = New-Object "$set_type[string]"
        }

        $packageToVersionToProjects[$packageId][$version].Add($project) | Out-Null
        $projectToPackageVersion[$project][$packageId] = $version
    }
}

foreach ($packageId in $packageToVersionToProjects.Keys | Sort-Object) {
    $versionToProjects = $packageToVersionToProjects[$packageId]
    $versions = $versionToProjects.Keys

    $versionToCount = @{}
    $versionToProjects.GetEnumerator() | %{
        $versionToCount[$_.Key] = $_.Value.Count
    }

    if ($versions.Count -gt 1) {
        $packageId | Write-Host -ForegroundColor "Magenta"

        foreach ($version in $versions | Sort-Object) {
            $versionCount = $versionToCount[$version]

            $mostUsedVersion = $true
            $versionToCount.GetEnumerator() | ?{
                $_.Key -ne $version
            } | ?{
                $_.Value -ge $versionCount
            } | %{
                $mostUsedVersion = $false
            }

            if ($mostUsedVersion) {
                " ($version)" | Write-Host -ForegroundColor "Cyan"
            } else {
                "  $version" | Write-Host -ForegroundColor "White"

                foreach ($project in $versionToProjects[$version]) {
                    $packageToVersion = $projectToPackageVersion[$project]
                    if ($packageToVersion.ContainsKey($packageId)) {
                        $packageVersion = $packageToVersion[$packageId]
                        if ($packageVersion -eq $version) {
                            "    $project" | Write-Host
                        }
                    }
                }
            }
        }

        Write-Host ""
    }
}