METHODS

"$main_tex_source = unpack_source($archive,$extraction_directory);"

Unpacks a given $archive into the $extraction_directory. Next, perform a
heuristic analysis to determine, and return, the main file of the TeX manuscript.
If the main file cannot be determined, the $extraction_directory is removed and undef is returned.

In this regard, we implement a simplified form of the logic in
TeX::AutoTeX and particularly arXiv::FileGuess

"@packed_documents = pack_collection(collection=>\@documents, whatsout=>'math|fragment|archive', siteDirectory=>$path);"

Packs a collection of documents using the packing method specified via the 'whatsout' option.
If 'fragment' or 'math' are chosen, each input document is transformed into
an embeddable fragment or a single formula, respectively.
If 'archive' is chose, all input documents are written into an archive in the specified 'siteDirectory'.
The name of the archive is provided by the 'destination' property of the first provided $document object.
Each document is expected to be a LaTeXML::Post::Document object.