gistfile1.rb

# Call +git+ and obtain the current commit SHA1 and commit date. Store these values
# in +APP_VERSION_COMMIT_ID+ and +APP_VERSION_COMMIT_DATE+. Then define
# +APP_VERSION+ to be a string of the two.

git_cmd     = 'git show --pretty=format:"%H|%ci" --quiet'
commit_id   = nil
commit_date = nil

begin
  unless RAILS_ENV=='test'
    commit_id, commit_date = IO.popen(git_cmd) {|f|
      log_entry = f.gets
      log_entry.split("|") unless log_entry.nil?
    }
  else
    commit_id, commit_date = '',''
  end
rescue Errno::ENOENT # git not installed
  commit_id = 'Unknown'
  commit_date = ''
end

unless defined?(::APP_VERSION)
  APP_VERSION_COMMIT_ID   = commit_id
  APP_VERSION_COMMIT_DATE = commit_date
  APP_VERSION             = "#{commit_id} #{commit_date}"
end