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Middleman xml sitemap (to aid Google and other search engines)
# encoding: utf-8
xml.instruct!
# Drop this file in your source directory
#
# Uses the builder gem.
# Add
# gem 'builder', '~> 2.0'
# to the Gemfile, and run builder install
#
# Add this line to config.rb:
# page "/sitemap.xml", :layout => false
#
# To tell Google and other search services about the sitemap, add
# Sitemap: http://www.your-domain.com/sitemap.xml
# to the robots.txt file. Or see
# http://support.google.com/webmasters/bin/answer.py?hl=en&answer=183669&topic=8476&ctx=topic for other options.
#
# For details on how to construct a site map, see
# http://www.sitemaps.org/protocol.html
# http://support.google.com/webmasters/bin/answer.py?hl=en&answer=156184&topic=8476&ctx=topic
#
# Remember to exchange www.your-domain.com for your domain (line 64)
# and to set an apropriate update frequency for your site (line 84)
xml.urlset "xmlns" => "http://www.sitemaps.org/schemas/sitemap/0.9" do
page_count = 0
sitemap.resources.each do |page|
catch :next_page do
# If all you want the sitemap to cover is normal html pages, use this:
# throw :next_page unless page.url.end_with?('.html')
#
# If you need more detailed control, this is a starting point:
throw :next_page if page.url.start_with?('/images/')
throw :next_page if page.url.start_with?('/javascripts/')
throw :next_page if page.url.start_with?('/stylesheets/')
throw :next_page if page.url.start_with?('/layouts/')
throw :next_page if page.url.start_with?('/apple-touch-icon')
throw :next_page if page.url.end_with?('.xml')
throw :next_page if page.url.start_with?('/.') # .htaccess, .DS_Store, .git etc.
throw :next_page if page.url == '/robots.txt'
throw :next_page if page.url == '/favicon.ico'
throw :next_page if page.url == '/humans.txt'
# Exclude drafts
throw :next_page if defined?(page.data) && page.data['published'] == false
throw :next_page if defined?(page.data) && page.data['date'] && page.data['date'].to_time > Time.now
# Exclude archive indexes
# I prefer not to have the calendar archive index pages in the sitemap.
# Remove this if you want them.
(2000..2030).each do |year|
# Exclude year index, directories and subdirectories
throw :next_page if page.url == "/#{year}.html" || page.url == "/#{year}" || page.url.start_with?("/#{year}/")
end
# Count pages
page_count += 1
raise "Over 50 000 pages, to much for a single sitemap" if page_count > 50000
# Build xml of sitemap
xml.url do
xml.loc 'http://www.your-domain.com' + page.url # TODO: possibly remove .html
# As usual, it's hard to get any solid information on how the search engines are
# using the information in the site map. lastmod (last modified) and changefreq
# (change frequency) seams to overlap each other. My guess is that it's best to
# use lastmod for pages where you know when the file changed, and changefreq for
# dynamic pages, like the first page of a blog and archive pages, where it's
# hard to know when the dynamic information was changed.
#
# Possible values for changefreq
# always
# hourly
# daily
# weekly
# monthly
# yearly
# never
case page.url
when '/index.html'
xml.changefreq 'daily' # Set this to a suitable value for your site
else
# Setting last modified (lastmod)
#
# Checks date in frontmatter and modification date of file, and uses the most recent.
# (Note: Will not be able to get the correct date for pages with dynamic content)
frontmatter_date = nil
frontmatter_date = page.data['date'].to_time.getlocal if defined?(page.data) && page.data['date']
file_mtime = nil
file_mtime = File.mtime(page.source_file).to_time.getlocal if defined?(page.source_file)
most_recent = [frontmatter_date, file_mtime].compact.max if frontmatter_date || file_mtime
xml.lastmod most_recent.strftime("%Y-%m-%d") # Using the more recent of the two dates.
# Using only date, stripping clock
end
# Priority (priority)
#
# To adjust the priority of a page, set sitemap_priority: in the frontmatter.
frontmatter_sitemap_priority = page.data['sitemap_priority'].to_f if (defined?(page.data) && page.data['sitemap_priority'])
if frontmatter_sitemap_priority && frontmatter_sitemap_priority < 0 && frontmatter_sitemap_priority > 1
raise "Incorrect sitemap_priority #{sitemap_priority} for #{page.destination_path}"
end
if frontmatter_sitemap_priority && frontmatter_sitemap_priority >= 0 && frontmatter_sitemap_priority <= 1
xml.priority frontmatter_sitemap_priority unless frontmatter_sitemap_priority == 0.5 # (No use setting the default priority)
end
end
end
end
end
@frasermarlow
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frasermarlow commented Aug 9, 2019

I found it useful to add @ line 49:

# Exclude priority zero 
throw :next_page if defined?(page.data) && page.data['sitemap_priority'].to_f == -1

Which allows for the setting of Priority = -1 and therefore allowing content editors the option of skipping individual pages in the XML Sitemap.

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