Add support for Pandoc Markdown #327
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alerque
requested changes
Sep 29, 2020
| pandoc = function(format) | ||
| return function(text) | ||
| local out_filename = os.tmpname() | ||
| local in_file = io.popen("pandoc -f markdown -t html -o " .. out_filename .. " -", "w") |
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Overall this PR looks good and I'd love to see it merged, but this bit of coding seems counter intuitive to me. You're writing to something called "in_file" and reading from "out_file" — but it's really tricky to realize whose perspective on in and out is being used here. I suggest using names that better represent what they are ... tmpfile, stdin or fifo or some such?
Otherwise I'll give this a test drive and make sure it works, then merge.
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Maybe markdown_file and html_file (based on the contents)?
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Because I merged cmark support from another PR, this will require a minor bit of conflict resolution. |
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This is another part of the solution to #162, along with #326. This PR adds support for Pandoc, which is a very robust and featureful Markdown processor written in Haskell. Since there's not really any way to directly integrate the library we just assume it's on
PATHand call it as an external program.I've tried to minimize the number of temporary files created, but apparently Lua has no
popen2equivalent so I think this is the best we can do (without additional dependencies or extensions).I've confirmed that this works to at least a basic level with Pandoc's built-in syntax highlighting if you use it in combination with #326 and set
pretty="none".