Merge pull request #78 from pulibrary/version_in_footer

Display the application version number in the footer

app/assets/stylesheets/application.css

@@ -13,3 +13,8 @@
  *= require_tree .
  *= require_self
  */
+
+ .deployment-version {
+   color: gray;
+   float: right;
+ }

app/views/layouts/application.html.erb

@@ -40,5 +40,8 @@
     <div class="lux">
       <library-footer></library-footer>
     </div>
+    <div class="deployment-version copyright" >
+      Version <span title="<%= GIT_SHA %>"><%= BRANCH %> last updated <%= LAST_DEPLOYED %>.</span>
+    </div>
   </body>
 </html>

config/initializers/git_sha.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+revisions_logfile = Rails.root.join("..", "..", "revisions.log")
+
+GIT_SHA =
+  if File.exist?(revisions_logfile)
+    `tail -1 #{revisions_logfile}`.chomp.split(" ")[3].gsub(/\)$/, "")
+  elsif Rails.env.development? || Rails.env.test?
+    `git rev-parse HEAD`.chomp
+  else
+    "Unknown SHA"
+  end
+
+BRANCH =
+  if File.exist?(revisions_logfile)
+    `tail -1 #{revisions_logfile}`.chomp.split(" ")[1]
+  elsif Rails.env.development? || Rails.env.test?
+    `git rev-parse --abbrev-ref HEAD`.chomp
+  else
+    "Unknown branch"
+  end
+
+LAST_DEPLOYED =
+  if File.exist?(revisions_logfile)
+    deployed = `tail -1 #{revisions_logfile}`.chomp.split(" ")[7]
+    Date.parse(deployed).strftime("%d %B %Y")
+  else
+    "Not in deployed environment"
+  end