CODEWITHSUNDEEP
ruby
Predrag Beocanin
Predrag Beocanin

Reputation: 1400

Jekyll plugin doesn't print variable out

Right so I'm trying to do something dead simple, which is go through some files and print out the contents. This is my _plugins/test.rb file:

module Jekyll
  class TestPlugin < Liquid::Tag
    def render(context)
      Dir.glob("somefolder/*.someextension") do |my_file|
          file = File.open(my_file)
          contents = file.read
          # print contents
      end
    end
  end
end

Liquid::Template.register_tag('testplugin', Jekyll::TestPlugin)

Now considering the env, a simple puts contents will output correct contents to the console. However, I want this to just spit out contents when called via {% testplugin %}. I've tried the following combinations:

"contents"
#{contents}
#{@contents}
print contents
print "contents"
print #{contents}
print #{@contents}

None of which output anything when called via {% testplugin %}. When I swap out my Dir.glob stuff for something like "Hello there", the output will be correct. Needless to say I'm very unfamiliar with Ruby.

Upvotes: 1

Views: 272

Answers (1)

mikej
mikej

Reputation: 66333

The issue here is that Dir.glob when given a block (as you've done) will call the block once for each matching filename but then returns nil.

This means that your render method isn't actually returning anything.

One solution is to call glob without a block. It will then return a list of the matching filenames and you can map this to the contents of the files.

For example to return the combined contents of all the matching files:

def render(context)
  Dir.glob("somefolder/*.someextension").map do |filename|
    File.read(filename)
  end.join("\n")
end

Upvotes: 1

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