Pre- and postprocessors as Lua-filters

[crsh]

Building on the avialable resources in the R package papaja, I want to provide a corresponding Quarto journal template. Some pre- and postprocessing is currently done through R. These operations have to be reimplemented as Lua-filters. This will be a welcome improvement that will also benefit the R Markdown format in papaja. The following is currently done in R:

PDF

Preprocessor

• Add filter to replace in-text ampersands after running citeproc
• Set default CSL
• Set various template variables and defaults
• Add \keywords{}
• Add wordcount
• Add raw LaTeX includes

Postprocessor

• Note is added to the end of the document by Lua filter and needs to be moved to the preamble (why? 😅 )
• The pandoc default template places \abstract{} inside the document environment, but apa6/apa7
• Omit empty \abstract{}`
• Remove pandoc listof...s
• Prevent (re-)loading of geometry package
• Apply bookdown post-processors to support additional markdown features

Word

Preprocessor

• Add filter to replace in-text ampersands after running citeproc
• Create title page
• Remove abstract to avoid redundancy introduced by pandoc
• Apply bookdown markdown processor to reslove cross-references
• Set default CSL

Postprocessor

• Add running head (if we can do this in Lua, it would also remove dependencies)

Currently, I think reimplementing the bookdown processors may not be the ideal solution. I currently think it may be best to keep them in papaja for the time being and look for alternative Lua filters for the Quarto template.