Could you explain how do you parse Asciidoc and obtain linenumbers?

[alexpdp7]

My group would like to write tooling that works on Asciidoc files, and I haven't found a good process to parse Asciidoc and generate line number information. This is something that Vale does, but I've been reading the source code for a while and I haven't figured out how does it do it.

Could you explain the trick? (edit: I figured out a hack to export an Asciidoctor AST by using Ruby and monkeypatching the library, but it's not ideail).

[jdkato]

Vale doesn't actually do any parsing of AsciiDoc; it operates entirely on HTML generated by Asciidoctor.

[alexpdp7]

Yes, I see that invokes the command line tool. My question is how does it generate so accurate line number and column information on errors. When using the VS Code plugin, it always highlights exactly where the error is, and there doesn't seem to be an obvious way to do that.