AppVentiX

2024.322.2030

private/Get-AppXManifest.ps1

                                <#

    .SYNOPSIS

        This function extracts the AppxManifest.xml file from a given package and returns its contents as an XML object.

    .DESCRIPTION

        The Get-AppXManifest function extracts the AppxManifest.xml file from a given package and returns its contents as an XML object.

    .PARAMETER Filename

        Specifies the path to the package from which to extract the AppxManifest.xml file.

    .PARAMETER Retries

        Specifies the number of times to retry opening the package.

        The default value is 3.

    .EXAMPLE

        PS C:\> Get-AppXManifest -Filename "C:\Packages\MyApp.msix"

        Returns the contents of the AppxManifest.xml file from the MyApp.msix package as an XML object.

    .EXAMPLE

        PS C:\> Get-AppXManifest -Filename "C:\Packages\MyApp.appx"

        Returns the contents of the AppxManifest.xml file from the MyApp.appx package as an XML object.

    .NOTES

        Function : Get-AppXManifest

        Author   : John Billekens

        Copyright: Copyright (c) AppVentiX

        Version  : 1.3

#>

function Get-AppXManifest {

    [CmdletBinding()]

    param(

        [Parameter( Mandatory, ValueFromPipeline, ValueFromPipelineByPropertyName, Position = 0 )]

        [Alias("Path")]

        [string]$Filename,

        [Int]$Retries = 3

    )

    Begin {

        Write-Verbose "Adding System.IO.Compression.FileSystem assembly"

        Add-Type -Assembly System.IO.Compression.FileSystem

    }

    Process {

        Write-Verbose "Checking if file exists: $Filename"

        if ([System.IO.File]::Exists("$Filename")) {

            Write-Verbose "Trying to open package"

            while ($Retries -gt 0) {

                try {

                    Write-Verbose "Reading file as zip package"

                    $zipFile = [io.compression.zipfile]::OpenRead($Filename)

                    break

                } catch {

                    $Retries--

                    if ($Retries -eq 0) {

                        throw $_

                    } else {

                        Write-Verbose "ERROR: $($_.Exception.Message)"

                        Write-Warning "Failed to open package $Filename, retrying..."

                        Start-Sleep -Seconds 3

                    }

                }

            }

            Write-Verbose "Searching for AppxManifest.xml"

            $manifest = $zipFile.Entries | Where-Object { $_.Fullname -Like 'AppxManifest.xml' }

            if ($manifest.Count -gt 1 -or $manifest.Count -eq 0) {

                Throw "Could not locate one unique AppxManifest.xml file in the package(root)!"

            } elseif ($manifest.Name -like 'AppxManifest.xml') {

                try {

                    Write-Verbose "Opening AppxManifest.xml"

                    $stream = $manifest.Open()

                    Write-Verbose "Streaming AppxManifest.xml to memory, Type Fullname is $($stream.GetType().FullName)"

                    if ($stream.Count -gt 1) {

                        Write-Verbose "Multiple streams found, using first stream"

                        Write-Verbose "Stream count: $($stream.Count)"

                        Write-Verbose "$($stream | Out-String)"

                    }

                    $streamReader = [System.IO.StreamReader]::new($stream)

                    Write-Verbose "Reading AppxManifest.xml as XML object"

                    [xml]$xml = $streamReader.ReadToEnd()

                    Write-Verbose "Manifest read, closing streams"

                    $streamReader.Close()

                    $stream.Close()

                    $zipFile.Dispose()

                    Write-Verbose "Returning AppxManifest.xml as XML object"

                    Write-Output $($xml)

                } catch {

                    Throw $_

                }

            } else {

                Throw [System.Management.Automation.ItemNotFoundException] "AppxManifest.xml not found in $(Split-Path -Path $Filename -Leaf)"

            }

        } else {

            Throw [System.Management.Automation.ItemNotFoundException] "File not found: `"$Filename`""

        }

    }

    End {

        Write-Verbose "Clearing variables"

        Clear-Variable Filename, zipFile, xml -ErrorAction SilentlyContinue

    }

}

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