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# Title: Include Array Tag for Jekyll

# Author: Jason Woodward http://www.woodwardjd.com

# Description: Import files on your filesystem as specified in a configuration variable in _config.yml. Mostly cribbed from Jekyll's include tag.

# Syntax: {% include_array variable_name_from_config.yml %}

#

# Example 1:

# {% include_array asides %}

#

# _config.yml snippet:

# asides: [asides/twitter.html, asides/custom/my_picture.html]

#

module Jekyll

class IncludeArrayTag < Liquid::Tag

Syntax = /(#{Liquid::QuotedFragment}+)/

def initialize(tag_name, markup, tokens)

if markup =~ Syntax

@array_name = $1

else

raise SyntaxError.new("Error in tag 'include_array' - Valid syntax: include_array [array from _config.yml]")

end

super

end

def render(context)

includes_dir = File.join(context.registers[:site].source, '_includes')

if File.symlink?(includes_dir)

return "Includes directory '#{includes_dir}' cannot be a symlink"

end

rtn = ''

(context.environments.first['site'][@array_name] || []).each do |file|

if file !~ /^[a-zA-Z0-9_\/\.-]+$/ || file =~ /\.\// || file =~ /\/\./

rtn = rtn + "Include file '#{file}' contains invalid characters or sequences"

end

Dir.chdir(includes_dir) do

choices = Dir['**/*'].reject { |x| File.symlink?(x) }

if choices.include?(file)

source = File.read(file)

partial = Liquid::Template.parse(source)

context.stack do

rtn = rtn + partial.render(context)

end

else

rtn = rtn + "Included file '#{file}' not found in _includes directory"

end

end

end

rtn

end

end

end

Liquid::Template.register_tag('include_array', Jekyll::IncludeArrayTag)