how to pass content to jekyll default converter after custom conversion?

Question

I am trying to write a jekyll plugin which do something on markdown files first and passing the content back to the default converter

For example,

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Answer 1

Here's how to do it:

module Jekyll
    class MyConverter < Converter
        safe :false
        priority :high

        def matches(ext)
            ext =~ /^\.(md|markdown)$/i
        end

        def output_ext(ext)
            ".html"
        end

        def convert(content)
            # do your own thing with the content
            content = my_own_thing(content)

            # Now call the standard Markdown converter
            site = Jekyll::Site.new(@config)
            mkconverter = site.getConverterImpl(Jekyll::Converters::Markdown)
            mkconverter.convert(content)
        end
    end
end

Basically, you were right in using Jekyll::Converters::Markdown, but you need not specify KramdownParser, as your chosen parser will be automatically chosen from Jekyll::Site when you pass @config into the constructor.