Backup Chocolatey Packages To File

New-PackageConfig.ps1

<#
    .SYNOPSIS
    Creates a packages.config file from installed choco packages

    .PARAMETER SourceFriendlyName
    The friendly name of an available choco source on the system. This will explicity set the source in the config file
    such that installation on the new system will come from this source.

    .PARAMETER OutputFile
    The config file to save output too. Must end in '.config'.

    .EXAMPLE
    ./New-PackageConfig.ps1 -SourceFriendlyName chocolatey -OutputFile 'C:\temp\packages.config'
#>
[cmdletBinding()]
param(
    [parameter(Mandatory = $true)]
    [string]
    $SourceFriendlyName,

    [parameter(Mandatory = $true)]
    [String]
    $OutputFile
)

begin {
    if ([System.IO.Path]::GetExtension($OutputFile) -ne '.config') {
        throw "Must specify a file ending in '.config'"
    }
    else {
        if (-not (Test-Path $OutputFile)) {
            $null = New-Item $OutputFile -ItemType File -Force
        }
    }
}

process {



    $string = @'
<?xml version="1.0" encoding="utf-8"?>
<packages>
</packages>
'@

    $string | Set-Content $OutputFile

    $xmlDoc = New-Object System.Xml.XmlDocument
    $xmlDoc.Load("$OutputFile")

    $sources = choco source list -r | ConvertFrom-Csv -Delimiter '|' -Header "FriendlyName", "SourceUrl", "Enabled", "Username", "Proxy", "Priority", "SelfService", "AdminOnly"
    $packages = choco list -lo -r | ConvertFrom-Csv -Delimiter '|' -Header 'Packagename', 'PackageVersion'

    Foreach ($package in $packages) {
        $script = { 
            $element = $xmlDoc.CreateElement("package")
            $name = $xmlDoc.CreateAttribute("id")
            $name.Value = "$($package.Packagename)"
            $version = $xmlDoc.CreateAttribute("version")
            $version.Value = "$($package.PackageVersion)"
            $source = $xmlDoc.CreateAttribute("source")
            $source.Value = "$(($sources | ? { $_.FriendlyName -eq "$SourceFriendlyName"}).SourceUrl)"
            $element.Attributes.Append($name)
            $element.Attributes.Append($version)
            $element.Attributes.Append($source)
            $xmlDoc.LastChild.AppendChild($element)
        }

        $sb = [Scriptblock]::Create($script)
        $null = $sb.InvokeReturnAsIs()
        $xmlDoc.Save("$OutputFile")

    }

}