How to retrieve doi/ url from citeproc with lua filter ?

How to retrieve doi/ url from citeproc with lua filter ?

['sebastien rey-coyrehourcq' via pandoc-discuss]

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Hi there,

I'm a little lost in lua filters.

If i want url and doi in my bibtex appearing in the AST Json #ref div i 
suppose the only way was to change default CSL. But after that, without 
regex ? is there a way to retrieve the url and the doi from elem? I said 
that because i need to push these information into my database after 
resolving.

The workflow is :

docs.md  -> pandoc --citeproc docs.bib + lua filter -> save key/doi/url of 
citation into a database for another usage

Best regards


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Re: How to retrieve doi/ url from citeproc with lua filter ?

['sebastien rey-coyrehourcq' via pandoc-discuss]

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Finally, with some efforts, and lot of googling (tutorial, stackoverflow, 
this mailling list) to find different pieces of explanation (i found the 
documentation of pandoc / lua filters really hard for newcomers ...) ,i 
found a solution to catch url from <div> generated by citeproc.

I'm interested by some feedback because my lua "skills" are really new :)

https://gist.github.com/reyman/12e31a533499790547179a2d40d7e021

Json Output and lib penlight to dump really help me to understand what 
happen : 
local pretty_dump = require"pl.pretty".dump

Best
Le vendredi 22 octobre 2021 à 23:26:28 UTC+2, sebastien rey-coyrehourcq a 
écrit :

> Hi there,
>
> I'm a little lost in lua filters.
>
> If i want url and doi in my bibtex appearing in the AST Json #ref div i 
> suppose the only way was to change default CSL. But after that, without 
> regex ? is there a way to retrieve the url and the doi from elem? I said 
> that because i need to push these information into my database after 
> resolving.
>
> The workflow is :
>
> docs.md  -> pandoc --citeproc docs.bib + lua filter -> save key/doi/url of 
> citation into a database for another usage
>
> Best regards
>
>
>

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Re: How to retrieve doi/ url from citeproc with lua filter ?

[John MacFarlane]

Congrats on figuring out a solution!

Here's a shorter way to do the same thing:

```
function Div(el)
  if el.identifier == "refs" then
    pandoc.walk_block(el, { Link = function (e) print(e.target) end })
  end
end

function Pandoc(el)
  return pandoc.Pandoc({})
end
```

Just be sure to run this filter AFTER --citeproc on the command
line.