Feature request - unpack needs single-file / footprint-file option

[jonwis]

Unpacking a multi-mb/multi-gb MSIX to pull out one file is wasteful. Please include a "-f" and "-ff" option, like:

# Unpack just the muffin.wasm and a group of DLLs
makemsix unpack -p file.msix -d .\output -ss -f code-assets\muffin.wasm -f appsvcimpl\*.dll

# Unpack just the catalog and manifest
makemsix unpack -p file.msix -d .\output -ss -ff codeintegrity -ff manifest

Where the "-ff" options are for the footprint files.

Option	File
manifest	The AppXManifest.xml for the package
blockmap	The blockmap XML file
signature	The signature file, if present
codeintegrity	The catalog file, if present
contentgroupmap	The content group map file

[DrusTheAxe]

Is -ff needed?

Footprint files are unique filenames; you can't put a 'content' file in an MSIX named appxmanifest.xml or signature.p7x. Filenames are unique so -f appxmanifest.xml would work equally well as -f foo.exe

Footprint files have well defined unique names, so -ff manifest as an alias for -f appxmanifest.xml seems unnecessary overkill