Get licenses for npm packages in node_modules

licenses.ps1

write-host "Scanning..."
$packages = Get-ChildItem .\node_modules -Filter 'package.json' -Recurse
write-host ("Found {0} packages." -f $packages.Count)
$licenses = @()

write-host "Reading licenses..."
foreach ($p in $packages) {
    $file = $p.FullName
    $data = Get-Content -Path $file | ConvertFrom-Json
    $license = $data.license
    $licenses += $license;
}

$uniques = $licenses | sort-object | Get-Unique | sort-object

write-host ("Found {0} unique licenses." -f $uniques.Count)

$uniques | % { write-host $_ }