total refactor of version header. X-Git-Update: ISO 8601 formated date of the last commit, X-Git-Revision: sha1 hash of the last commit

app/controllers/application_controller.rb

@@ -10,6 +10,7 @@ class ApplicationController < ActionController::Base
   before_filter :count_requests
   before_filter :set_invites
   before_filter :set_locale
+  before_filter :set_git_header
   before_filter :which_action_and_user
   prepend_before_filter :clear_gc_stats
 
@@ -33,6 +34,11 @@ class ApplicationController < ActionController::Base
     end
   end
 
+  def set_git_header
+    headers['X-Git-Update'] = GIT_UPDATE unless GIT_UPDATE.nil?
+    headers['X-Git-Revision'] = GIT_REVISION unless GIT_REVISION.nil?
+  end
+
   def which_action_and_user
     str = "event=request_with_user controller=#{self.class} action=#{self.action_name} "
     if current_user

config/initializers/version_header.rb

@@ -1,31 +1,13 @@
-#original from https://github.com/jopper/diaspora
-#modified by David Morley
-require 'time'
+#   Copyright (c) 2010, Diaspora Inc.  This file is
+#   licensed under the Affero General Public License version 3 or later.  See
+#   the COPYRIGHT file.
 
-  def last_modified
-    git_last='git log -1 --pretty=format:"%cd"'
-    filepath = Rails.root.join('tmp', '.last_pull')
-    time_min = 60
-    @header_name = "X-Git-Update"
-    if File.writable?(filepath)
-      begin
-        mtime = File.mtime(filepath)
-        last = IO.readlines(filepath).at(0)
-      rescue Exception => e
-        Rails.logger.info("Failed to read git status #{filepath}: #{e}")
-      end
-    end
-    if (mtime.nil? || mtime < Time.now-time_min)
-      last = `#{git_last}`
-      begin
-        f = File.open(filepath, 'w')
-        f.puts(last)
-        f.close
-      rescue Exception => e
-        Rails.logger.info("Failed to log git status #{filepath}: #{e}")
-      end
-    end
-    last
-      headers[@header_name] = "#{last}"
-    end
 
+git_cmd = `git log -1 --format="%H %ci"`
+if git_cmd =~ /^([\d\w]+?)\s(.+)$/
+  GIT_REVISION = $1
+  GIT_UPDATE = $2.strip
+else
+  GIT_REVISION = nil
+  GIT_UPDATE = nil
+end