Creates a Sitecore package for an item include the item, its templates and base templates, renderings and their datasource items and templates.

CreateSitecorePackageOfPageAndAllItems.ps1

function AddItemToCollection($itemId) 
{
  $itemCollection.Add($itemId)
}

function GetRenderings()
{
   Get-Rendering -Item $startItem -FinalLayout | Foreach-Object { 
     
         if($_.ItemID)
         {
           AddItemToCollection($_.ItemID)
         }
         
         if($_.DataSource)
         {
          AddItemToCollection($_.DataSource)
         }
    }
    
   Get-Rendering -Item $startItem | Foreach-Object { 
     
         if($_.ItemID)
         {
           AddItemToCollection($_.ItemID)
         }
         
         if($_.DataSource)
         {
          AddItemToCollection($_.DataSource)
         }
    }
}

$itemCollection = New-Object System.Collections.Generic.List[System.Object]

$startItem = Get-Item -Path "master:\sitecore\content\Home" -Language en

AddItemToCollection($startItem.ID)

GetRenderings

Write-Host "Total Items Found " $itemCollection.Count

$sourceItems = New-Object System.Collections.Generic.List[Sitecore.Data.Items.Item]
foreach($id in $itemCollection)
{
    $itemToAdd = Get-Item master -ID $id
    if($itemToAdd -ne $null)
    {
         $templateToAdd = Get-ItemTemplate -Item $itemToAdd
         
        try{
            $sourceItems.Add($itemToAdd);
            
            If ($templateToAdd.FullName -NotMatch "System")
            {
                $sourceItems.Add($templateToAdd);
            }
        }
        catch{
        }
        
        $baseTemplates = [Sitecore.Data.Managers.TemplateManager]::GetTemplate($templateToAdd).GetBaseTemplates();
        
        foreach($basetemplate in $baseTemplates)
        {
           $baseTemplteItem = Get-Item master -ID $basetemplate.ID
            If ($baseTemplteItem.ItemPath -NotMatch "System")
            {
                try{
                    $sourceItems.Add($baseTemplteItem);
                }
        catch{
        }
            }
        }
    }
}

if($itemCollection.Count -gt 0)
{
    # Create package
    $package = new-package ([string]::Format("Items Extract for {0}", $startItem.Name));
    
    # Set package metadata
    $package.Sources.Clear();
    
    $package.Metadata.Publisher = "Principle Logic";
    $package.Metadata.Version = "1.0";
    $package.Metadata.Author = [Sitecore.Context]::User.Profile.FullName;
    $package.Metadata.Readme = 'Package contains the item referenced, its renderings and datasource items, templates and base templates'
    
    # Add content
    $sourceItems = $sourceItems | sort -unique
    
    $source =$sourceItems | New-ExplicitItemSource -Name "ItemsSource" -InstallMode Skip #-InstallMode Merge -MergeMode Merge
    
    foreach($item in $sourceItems)
    {
        try{
            $source.ExplicitItemSource.Add($item);
        }
        catch{}
    }
    
    $package.Sources.Add($source);
    
    # Save package
    Export-Package -Project $package -Path "$($package.Name)-$($package.Metadata.Version).zip" -Zip
    
    # Offer the user to download the package
    Download-File "$SitecorePackageFolder\$($package.Name)-$($package.Metadata.Version).zip"
}