Premailer和Jekyll

Question

我正在做一个既有静态网页又有HTML电子邮件模板的项目。

您可能知道，HTML电子邮件要求所有CSS内联，这是一个巨大的痛苦管理。大多数人使用Premailer来自动处理这个问题- https://github.com/premailer/premailer

我将如何使用premailer与Jekyll在一个特定的布局？

是否可以通过插件使用预邮件程序？

Answer 1

不，你可以！

安装了premailer之后，您可以制作一个类似于此的jekyll插件：

require 'premailer'

module Jekyll
  class Site

    # create an alias for the overriden site::write method
    alias orig_write write

    # we override the site::write method
    def write

      # first call the overriden write method,
      # in order to be sure to find generated css
      orig_write

      # layout name we are looking for in pages/post front matter
      # this can come from site config
      @layout   = 'post'

      # this the css that will be inlined
      # this can come from site config
      @css_path = '/css/main.css'

      # look for generated css file content
      @cssPages = pages.select{ |page|
        page.destination(dest).include? @css_path
      }

      # look again in pages and posts
      # to generate newsletters with premailer
      newsletters = [posts, pages].flatten.select{ |page_or_post|
        page_or_post.data['layout'] == @layout
      }

      newsletters.each do |newsletter|

        newsletter.output = Premailer.new(
            newsletter.output,
            {
                # declare that we pass page html as a string not an url
                :with_html_string => true,
                # also pass css content as a string
                :css_string       => @cssPages.join,
            }
        ).to_inline_css;

        # rewrite the newsletter with inlined css
        newsletter.write(dest)

      end
    end
  end
end

这是关于如何将premailer与Jekyll集成的一般想法。代码当然可以改进。

注意:我决定不使用发电机插件，因为当调用生成器时，sass和scss文件仍然没有解析，生成的css也不可用。