Extract all license infomation of all used nuget packages

Get-NugetLicense.ps1

$lic = New-Item -ItemType Directory -Name "lic" -Force -ErrorAction "Stop"; 
$projects = @( Get-Project -All | ? { $_.ProjectName } | % { Get-Package -ProjectName $_.ProjectName } );
$deps = $projects | %{ $_ | Add-Member -MemberType "NoteProperty" -Value "$($_.Id)@$($_.Version)" -Name "Key"; $_ } | Sort -Property "Key" -Unique; 
$deps | %{ $pkg = $_; if($null -eq $pkg.LicenseUrl) { Set-Content -Path ($lic.FullName + "\no_license_" + $pkg.Id + ".txt") -Value "NO-LICENCE" } }
$loaded = $deps | %{ $pkg = $_; if($null -ne $pkg.LicenseUrl) { Try { $extMatch = [regex]::Match($pkg.LicenseUrl, '^.*?(\.html?|\.txt)$'); if($extMatch.Success){$ext = $extMatch.Groups[1].Value;} else {$ext = ".html"} $cnt = (New-Object System.Net.WebClient).DownloadString($pkg.LicenseUrl); Write-Host "$($pkg.LicenseUrl) downloaded for $($pkg.Id)."; @{ PKg = $pkg; Content = $cnt; } | Write-Output } Catch [system.exception] { Write-Host "Could not download license for $($pkg.Id) -> '$($pkg.LicenseUrl)'" } } }
$loaded | %{ $pkg = $_["Pkg"]; $cnt = $_["Content"]; $l = if($cnt -cmatch "Apache"){"apache_"}elseif($cnt -cmatch "MIT"){"mit_"}elseif($cnt -cmatch "GPL"){"gpl_"}else{"unknown_"} $ext = if($cnt -imatch "<html"){".html"}else{".txt"} $p = ($lic.FullName + "\" +  $l + $pkg.Id + $ext); Set-Content $p -Value $cnt; }

Save file with extension as used in the url.