Powershell script to generate nuget packages with dependencies

GenerateSitecoreNugetPackages.ps1

param(
  [string] $Major = "8",
  [string] $Minor = "1",
  [string] $Update = "0",
  [string] $Date = "151003",
  [string] $nugetPath = ".\tools\nuget.exe",
  [string] $downloadsPath = ".\downloads",
  [string] $nuspecTemplate = ".\tools\package.nuspec.xml",
  [string] $apiKey,
  [string] $nugetFeed = "http://use-your.own/nuget/Sitecore-Libs"
)

function Publish-NugetPackageFromWebsiteBin(
  [string] $major,
  [string] $minor,
  [string] $update,
  [string] $date,
  [string] $nugetPath,
  [string] $downloadsPath,
  [string] $nuspecTemplate,
  [string] $apiKey,
  [string] $nugetFeed)
{
  $bin = Resolve-Path ("$downloadsPath\Sitecore $major.$minor rev. $date\website\bin")
  $nugetPath = Resolve-Path $nugetPath
  $nuspecTemplate = Resolve-Path $nuspecTemplate

  $updateText = "Initial Release"
  if($update -gt 0)
  {
    $updateText = "$major.$minor Update-$update"
  }

  $description = "Sitecore Experience Platform $major.$minor rev. $date ($updateText)"
  $version = "$major.$minor.$update.$date"

  # clean-up
  $output = New-Item -ItemType Directory -Path ($env:temp + "\" + [System.Guid]::NewGuid())

  #call functions
  Get-ChildItem $bin |
    Where-Object {$_.Name -match "^Sitecore.*\.dll$"} |
    Foreach { Publish-NugetPackageFromDLL $bin $_.Name $output.FullName $description $version $nugetPath $nugetFeed  $apiKey $nuspecTemplate }

  Remove-Item $output -Force -Recurse
}

function Publish-NugetPackageFromDLL(
  $binPath, $assemblyName, $output, $description, $productVersion, $nugetPath, $nugetFeed, $apiKey, $nuspecTemplate)
{
    $tempPath = $output + "\tmp"
    # dlls
    $file = Get-Item "$binPath\$assemblyName"
    $id = [System.IO.Path]::GetFileNameWithoutExtension($file)

    $version = $productVersion
    $framework = Get-FrameworkVersion($file)

    # create package directory
    $tmpFolder =New-Item $tempPath -type directory -Force
    $packageFolder = New-Item "$tmpFolder\$id" -type directory -Force
    $libsFolder = New-Item "$packageFolder\lib" -type directory -Force
    $frameworkFolder = New-Item "$libsFolder\$framework" -type directory -Force

    # packages
    $nuspeck = New-Nuspec $file $binPath $nuspecTemplate $id $productVersion $description $framework $packageFolder

    # write files
    Copy-Item $file $frameworkFolder -Force

    $assemblyXml = "$binPath\$id.xml"
    if(Test-Path $assemblyXml)
    {
        Copy-Item $assemblyXml $frameworkFolder -Force
    }

    $assemblyPub = "$binPath\$id.pub"
    if(Test-Path $assemblyPub)
    {
        Copy-Item $assemblyPub $frameworkFolder -Force
    }

    $output = New-Item "$basePath\packages" -type directory -Force
    & $nugetPath pack $nuspeck.FullName -OutputDirectory $output

    if (-Not([string]::IsNullOrEmpty($apiKey)) -AND -Not([string]::IsNullOrEmpty($nugetFeed))){
      & $nugetPath push "$output\$id.$productVersion.nupkg" -ApiKey $apiKey -Source $nugetFeed
    }
}

function New-Nuspec(
  $assemblyFile,
  [string] $pathToDependencies,
  [string] $nuspecTemplate,
  [string] $packageId,
  [string] $packageVerison,
  [string] $packageDescription,
  [string] $packageFramework,
  [string] $output
)
{
  $xml = [xml](Get-Content $nuspecTemplate)

  # Set ID
  $node = $xml.package.metadata
  $node.ID = $packageId
  $node.version = $packageVerison
  $node.description = "Autogenerated NuGet package form $packageDescription"
  $group = $xml.CreateElement('group');

  # get framework version
  $group.SetAttribute('targetFramework', $packageFramework )

  $assemblyDependencies = Get-AssemblyDependencies($assemblyFile)
  $dependencies = $xml.CreateElement('dependencies');


  foreach ($assembly in $assemblyDependencies){

     $depVersion = Find-AssemblyAndReturnVersion "$pathToDependencies\$($assembly.Name).dll" $packageVerison

     if ($depVersion -ne "0.0.0")
     {
        $dep = $xml.CreateElement('dependency')
        $dep.SetAttribute('id', $assembly.Name )
        $dep.SetAttribute('version', '[' + $(Find-AssemblyAndReturnVersion "$binPath\$($assembly.Name).dll" $packageVerison) + ']')
        $group.AppendChild($dep)
     }
  }

  $dependencies.AppendChild($group)
  $node.AppendChild($dependencies)
  # write nuspeck
  $xml.Save("$output\$packageId.nuspec")

  return Get-Item "$output\$packageId.nuspec"
}

function Get-FrameworkVersion([string] $path)
{
    $imageRuntimeVersion = [System.Reflection.Assembly]::LoadFrom($path).ImageRuntimeVersion.ToString()

    if($imageRuntimeVersion.Contains("v4.5"))
    {
        return "net45"
    }

    return "net40"
}

function Get-AssemblyDependencies([string] $path)
{
    return [System.Reflection.Assembly]::ReflectionOnlyLoadFrom($path).GetReferencedAssemblies() |
        Where-Object {$_.Name -match "Sitecore\.[A-Za-z\.]*"} |
        Select Name |
        Where { -not([string]::IsNullOrEmpty($_)) } |
        Sort-Object -Property Name | 
        Get-Unique
}

function Find-AssemblyAndReturnVersion([string] $pathToAssembly, [string] $productVesion)
{
    if (Test-Path $pathToAssembly)
    {
        return $productVesion
    }

    return "0.0.0"
}

Publish-NugetPackageFromWebsiteBin $Major $Minor $Update $Date $nugetPath $downloadsPath $nuspecTemplate $apiKey $nugetFeed