solutions.ps1

$excludes = @("node_modules", "packages", ".git", ".vs")

function Get-SolutionFiles() {
    (
        @(Get-ChildItem *.sln) +
        @(Get-ChildItem -Directory | ? { $excludes -notcontains $_.Name } | % { Get-ChildItem $_ -Recurse -Filter *.sln })
    )
}

function Analyze-Solutions() {
    Get-SolutionFiles | % {
        $retVal = New-Object -TypeName PSObject |
            Add-Member Path $_.FullName -PassThru |
            Add-Member Name $_.Name -PassThru |
            Add-Member Projects @() -PassThru
        $sln = Get-Content $_.FullName
        $slnDir = $_.Directory
        $sln | 
            ? { $_ -match "^Project\(.*\) = \`".*\`", \`"(.*)\`", \`".*\`"" } | 
            % { "$slnDir\$($matches[1])" } |
            % {
                $info = Get-Item $_
                $prj = [xml](Get-Content $info.FullName)
                $prjObj = New-Object -TypeName PSObject |
                    Add-Member Path $info.FullName -PassThru |
                    Add-Member Name $info.Name -PassThru

                $refs = $prj.Project.ItemGroup.Reference.Include | % {
                    New-Object -TypeName PSObject |
                        Add-Member Name $_ -PassThru | 
                        Add-Member Project $prjObj -PassThru
                }


                $prjObj | Add-Member References $refs
                $retVal.Projects += $prjObj
            }
        $retVal
    }
}

$analysis = Analyze-Solutions
$foo.Projects.References | Group-Object Name | Sort-Object Count | ? { $_.Count -gt 1 }