choco-outdated.ps1

# compare packages in local repo to community repo, download new versions
# needs Chocolatey installed

# Thanks to bog for this function
function Get-NUPKG-Version {
  Param(
    [Parameter(Mandatory = $true, Position = 0)]
    [string] $fullpath
  )
  
  Add-Type -assembly "system.io.compression.filesystem"
  $zip = [io.compression.zipfile]::OpenRead($fullpath)
  $file = $zip.Entries | where-object { $_.Name -Like "*.nuspec" }
  $stream = $file.Open()

  $reader = New-Object IO.StreamReader($stream)
  $text = $reader.ReadToEnd()

  $reader.Close()
  $stream.Close()
  $zip.Dispose()

  $xml = [xml]$text
  $version = $xml.package.metadata.version
  return $version
}
function Get-NUPKG-Name {
  Param(
    [Parameter(Mandatory = $true, Position = 0)]
    [string] $fullpath
  )
  Add-Type -assembly "system.io.compression.filesystem"
  $zip = [io.compression.zipfile]::OpenRead($fullpath)
  $file = $zip.Entries | where-object { $_.Name -Like "*.nuspec" }
  $stream = $file.Open()

  $reader = New-Object IO.StreamReader($stream)
  $text = $reader.ReadToEnd()

  $reader.Close()
  $stream.Close()
  $zip.Dispose()

  $xml = [xml]$text
  $packageName = $xml.package.metadata.id
  return $packageName
}

# Use system proxy, user creds
$Wcl = new-object System.Net.WebClient
$Wcl.Headers.Add("user-agent", "PowerShell Script")
$Wcl.Proxy.Credentials = [System.Net.CredentialCache]::DefaultNetworkCredentials

Write-output "Getting list of packages"
$outputUnsorted = Get-ChildItem -path \\server\share$\choco\packages -Recurse -Attributes !Directory -Filter *.nupkg

# sort by package name, then package version, using dotnet's [version] data type
$output = ($outputUnsorted | Sort-Object -property @{ Expression = { (Get-NUPKG-Name($_.FullName)) } }, @{ Expression = { [version] (Get-NUPKG-Version($_.FullName)) } } )

# checks package with next package on list, if different then latest version in local repo, compare to community repo, download new versions
for ($i = 0; $i -lt $output.count; $i++) {
  $package = $output[$i]
  Write-Output "Checking $package"
    
  $packageName = Get-NUPKG-Name($package.Fullname)
    
  if ($i -lt $output.count - 1) {
    $nextPackageName = Get-NUPKG-Name($output[$i + 1].FullName)
  }
  else {
    $nextPackageName = "lastpackage"
  }
  if ($nextPackageName -ne $packageName ) {
    Write-Output "latest local version $package"
            
    $latestPackage = choco info $packageName --limit-output
    Write-Output "Comparing $packageName : new version $latestPackage to old version $package"
            
    $a = $latestPackage.split("|")
    $newFileName = $latestPackage.Replace("|", ".") + ".nupkg"
            
    if ($newFilename -ne $package) {
      $b = "https://chocolatey.org/api/v2/package/$packageName/$($a[1])"
      Write-Output "Downloading $b"
      Invoke-WebRequest -uri $b -OutFile "$($a[0]).$($a[1]).nupkg"
    }
  }
}