Jekyll plugin to replace Markdown images eg. `` with `{% picture %}` tag

markdown-img-picture-replacement.rb

# Description: Jekyll plugin to replace Markdown image syntax with {% picture %} tag for crafting responsive images
# place in /_plugins/

Jekyll::Hooks.register :posts, :pre_render do |post, payload|
  docExt = post.extname.tr('.', '')
  # only process if we deal with a markdown file
  if payload['site']['markdown_ext'].include? docExt
    newContent = post.content.gsub(/\!\[(.+)\]\((.+)\)/, '{% picture default \2 alt="\1" %}')
    post.content = newContent
  end
end

This version works for collections in addition to posts (e.g. here made to work with Jekyll Picture Tag):

Jekyll::Hooks.register :documents, :pre_render do |document, payload|
  docExt = document.extname.tr('.', '')
  # only process if we deal with a markdown file
  if payload['site']['markdown_ext'].include? docExt
    newContent = document.content.gsub(/!\[(.*)\]\(([^\)]+)\)(?:{:([^}]+)})*/, '{% picture default \2 --alt \1  %}')
    document.content = newContent
  end
end

How can i use it in bettercap ? through proxy

I'm using this in the year of our lord 2022. Thanks @mmistakes! 🙌

I changed the regex to

newContent = post.content.gsub(/\!\[(.*)\]\((.+)\)/, '{% picture default \2 alt="\1" %}')

to allow it to work even if the alt text is the empty string.

I've done some more work to make this plugin more robust and readable. See: https://gist.github.com/tadamcz/869802c919c72172486f219751904108