Merge pulls #1048 and #1051

- 1048: Conditionally build some pages differently based on environmental variables
- 1051: Backend: cache events and contributor listings

_plugins/contributors.rb

@@ -106,9 +106,44 @@ module Jekyll
         return
       end
 
-      # Populate site.corecontributors and site.sitecontributors arrays
-      site.corecontributors = contributors('bitcoin/bitcoin',site.config['aliases'])
-      site.sitecontributors = contributors('bitcoin-dot-org/bitcoin.org',site.config['aliases'])
+      ## Create cache directory if it doesn't exist
+      if !File.exists?('_cache')
+        Dir.mkdir('_cache')
+      end
+
+      # Populate site.corecontributors and site.sitecontributors with
+      # data from GitHub.com. Store data in the cache and only
+      # re-retrieve the data if 86,400 seconds (24 hours) passes from
+      # the retrieval date or if the cache file is deleted.  For
+      # simplicity, updates on the two cache files are linked, so if one
+      # file has to be updated, they both get updated.
+      corecontributors_cache = '_cache/corecontributors.marshall'
+      sitecontributors_cache = '_cache/sitecontributors.marshall'
+      if File.exists?(corecontributors_cache) && File.exists?(sitecontributors_cache)
+        corecontributors_cache_age = (Time.now - File.stat(corecontributors_cache).mtime).to_i
+        sitecontributors_cache_age = (Time.now - File.stat(sitecontributors_cache).mtime).to_i
+      else
+        corecontributors_cache_age = Time.now.to_i
+        sitecontributors_cache_age = Time.now.to_i
+      end
+
+      if corecontributors_cache_age > 86400 || sitecontributors_cache_age > 86400
+        site.corecontributors = contributors('bitcoin/bitcoin',site.config['aliases'])
+        File.open(corecontributors_cache,'w') do |file|
+          Marshal.dump(site.corecontributors, file)
+        end
+        site.sitecontributors = contributors('bitcoin-dot-org/bitcoin.org',site.config['aliases'])
+        File.open(sitecontributors_cache,'w') do |file|
+          Marshal.dump(site.sitecontributors, file)
+        end
+      else
+        File.open(corecontributors_cache,'r') do |file|
+          site.corecontributors = Marshal.load(file)
+        end
+        File.open(sitecontributors_cache,'r') do |file|
+          site.sitecontributors = Marshal.load(file)
+        end
+      end
 
     end
 

_plugins/env.rb

@@ -0,0 +1,20 @@
+# This file is licensed under the MIT License (MIT) available on
+# http://opensource.org/licenses/MIT.
+
+## env.rb takes select environmental variables and makes them available
+## to the site templates. Currently, only variables starting with
+## BITCOINORG_ are exported
+
+module Jekyll
+  class EnvGenerator < Generator
+    def generate(site)
+      ## If necessary, initialize env hash table
+      site.config["env"] = site.config["env"] ? site.config["env"] : {}
+
+      ## Load matching environmental variables in to array
+      ENV.keys.grep /^BITCOINORG_/ do |key|
+        site.config['env'].merge!({ key => ENV[key] })
+      end
+    end
+  end
+end

_plugins/events.rb

@@ -142,9 +142,58 @@ module Jekyll
         return
       end
 
-      # Populate site.conferences and site.meetups arrays
-      site.conferences = conferences()
-      site.meetups = meetups()
+      ## Create cache directory if it doesn't exist
+      if !File.exists?('_cache')
+        Dir.mkdir('_cache')
+      end
+
+      ## Populate site.conferences with conferences from _events.yml
+      ## plus geodata from Google. Store data in the cache and only
+      ## re-retrieve the geodata if _events.yml is edited or the cache
+      ## file is deleted.
+      conferences_cache = '_cache/conferences.marshall'
+      events_file = '_events.yml'
+
+      events_file_unix_time = File.stat(events_file).mtime.to_i
+      if File.exists?(conferences_cache)
+        conferences_cache_unix_time = File.stat(conferences_cache).mtime.to_i
+      else
+        conferences_cache_unix_time = 0
+      end
+
+      if events_file_unix_time >= conferences_cache_unix_time
+        site.conferences = conferences()
+        File.open(conferences_cache,'w') do |file|
+          Marshal.dump(site.conferences, file)
+        end
+      else
+        File.open(conferences_cache,'r') do |file|
+          site.conferences = Marshal.load(file)
+        end
+      end
+
+      # Populate site.meetups with data from Meetup.com.  Store data in
+      # the cache and only re-retrieve the data if 86,400 seconds (24
+      # hours) passes from the retrieval date or if the cache file is
+      # deleted.
+      meetups_cache = '_cache/meetups.marshall'
+      if File.exists?(meetups_cache)
+        meetups_cache_age = (Time.now - File.stat(meetups_cache).mtime).to_i
+      else
+        meetups_cache_age = Time.now.to_i
+      end
+
+      if meetups_cache_age > 86400
+        site.meetups = meetups()
+        File.open(meetups_cache,'w') do |file|
+          Marshal.dump(site.meetups, file)
+        end
+      else
+        File.open(meetups_cache,'r') do |file|
+          site.meetups = Marshal.load(file)
+        end
+      end
+
     end
 
   end