forked from tsmango/jekyll_alias_generator
/
alias_generator.rb
105 lines (88 loc) · 2.75 KB
/
alias_generator.rb
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# Alias Generator for Posts.
#
# Generates redirect pages for posts with aliases set in the YAML Front Matter.
#
# Place the full path of the alias (place to redirect from) inside the
# destination post's YAML Front Matter. One or more aliases may be given.
#
# Example Post Configuration:
#
# ---
# layout: post
# title: "How I Keep Limited Pressing Running"
# alias: /post/6301645915/how-i-keep-limited-pressing-running/index.html
# ---
#
# Example Post Configuration:
#
# ---
# layout: post
# title: "How I Keep Limited Pressing Running"
# alias: [/first-alias/index.html, /second-alias/index.html]
# ---
#
# Author: Thomas Mango
# Site: http://thomasmango.com
# Plugin Source: http://github.com/tsmango/jekyll_alias_generator
# Site Source: http://github.com/tsmango/tsmango.github.com
# Plugin License: MIT
module Jekyll
class AliasGenerator < Generator
def generate(site)
@site = site
process_posts
process_pages
end
def process_posts
@site.posts.each do |post|
generate_aliases(post.url, post.data['alias'])
end
end
def process_pages
@site.pages.each do |page|
generate_aliases(page.destination('').gsub(/index\.(html|htm)$/, ''), page.data['alias'])
end
end
def generate_aliases(destination_path, aliases)
alias_paths ||= Array.new
alias_paths << aliases
alias_paths.compact!
alias_paths.flatten.each do |alias_path|
alias_path = File.join('/', alias_path.to_s)
alias_dir = File.extname(alias_path).empty? ? alias_path : File.dirname(alias_path)
alias_file = File.extname(alias_path).empty? ? "index.html" : File.basename(alias_path)
fs_path_to_dir = File.join(@site.dest, alias_dir)
alias_sections = alias_dir.split('/')[1..-1]
FileUtils.mkdir_p(fs_path_to_dir)
File.open(File.join(fs_path_to_dir, alias_file), 'w') do |file|
file.write(alias_template(destination_path))
end
alias_sections.size.times do |sections|
@site.static_files << Jekyll::AliasFile.new(@site, @site.dest, alias_sections[0, sections + 1].join('/'), '')
end
@site.static_files << Jekyll::AliasFile.new(@site, @site.dest, alias_dir, alias_file)
end
end
def alias_template(destination_path)
<<-EOF
<!DOCTYPE html>
<html>
<head>
<link rel="canonical" href="#{destination_path}"/>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<meta http-equiv="refresh" content="0;url=#{destination_path}" />
</head>
</html>
EOF
end
end
class AliasFile < StaticFile
require 'set'
def modified?
return false
end
def write(dest)
return true
end
end
end