The grit gem didn't work on Heroku - change to simpler approach using…

… the COMMIT_HASH environment variable and File last modified date.

Gemfile

@@ -8,7 +8,6 @@ gem 'json_pure', :require => 'json'
 gem 'nokogiri'
 gem 'rdiscount'
 gem 'doodle'
-gem 'grit'
 
 gem 'rdf', ">=0.3.1"
 gem 'rdf-json', :require => 'rdf/json'

Gemfile.lock

@@ -9,19 +9,13 @@ GEM
     equivalent-xml (0.2.9)
       nokogiri (>= 1.4.3)
     fakeweb (1.3.0)
-    grit (2.5.0)
-      diff-lcs (~> 1.1)
-      mime-types (~> 1.15)
-      posix-spawn (~> 0.3.6)
     haml (3.1.4)
     htmlentities (4.3.1)
     json_pure (1.7.0)
     metaclass (0.0.1)
-    mime-types (1.17.2)
     mocha (0.11.4)
       metaclass (~> 0.0.1)
     nokogiri (1.5.2)
-    posix-spawn (0.3.6)
     rack (1.4.1)
     rack-protection (1.2.0)
       rack
@@ -76,7 +70,6 @@ DEPENDENCIES
   emk-sinatra-url-for
   equivalent-xml
   fakeweb
-  grit
   json_pure
   mocha
   nokogiri

dbpedialite.rb

@@ -9,8 +9,8 @@ class DbpediaLite < Sinatra::Base
   set :public_folder, File.join(root, 'public')
 
   DEFAULT_HOST = 'dbpedialite.org'
-  GIT_REPO_PATH = File.join(root, '.git')
-  GIT_LAST_COMMIT = Grit::Repo.new(GIT_REPO_PATH).commits.first
+  GIT_LAST_UPDATED = File.mtime(File.join(root, '.git', 'index'))
+  GIT_LAST_COMMIT = ENV['COMMIT_HASH'] || `git rev-parse HEAD`
 
   def self.extract_vocabularies(graph)
     vocabs = {}

views/layout.erb

@@ -46,7 +46,7 @@
     Source code: <%= link_to('http://github.com/njh/dbpedialite') %>
   </div>
   <div class="links">
-    Last updated: <%= link_to(GIT_LAST_COMMIT.authored_date, 'http://github.com/njh/dbpedialite/tree/' + GIT_LAST_COMMIT.id) %>
+    Last updated: <%= link_to(GIT_LAST_UPDATED, 'http://github.com/njh/dbpedialite/tree/' + GIT_LAST_COMMIT) %>
   </div>
 </div>