Rakefile

desc "Compile website"
task :compile do
  `nanoc compile`
end

def commit_message skip_confirmation = false
  last_commit = `git log -1 --pretty=format:"%s"`.chomp.strip
  last_commit = 'Publishing developer content to GitHub pages.' if last_commit == ''

  unless skip_confirmation
    print "Enter a commit message (default: '#{last_commit}'): "
    STDOUT.flush
    mesg = STDIN.gets.chomp.strip
  end

  mesg = last_commit unless mesg
  mesg.gsub(/'/, '') # to allow this to be handed off via -m '#{message}'
end

desc "Deploy to http://developer.everydayhero.com"
task :deploy => [:compile] do
  mesg = commit_message ENV['skip_confirmation']

  ENV['GIT_DIR'] = File.expand_path(`git rev-parse --git-dir`.chomp)
  old_sha = `git rev-parse refs/remotes/origin/gh-pages`.chomp
  Dir.chdir('output') do
    ENV['GIT_INDEX_FILE'] = gif = '/tmp/dev.gh.i'
    ENV['GIT_WORK_TREE'] = Dir.pwd
    File.unlink(gif) if File.file?(gif)
    `git add -A`
    tsha = `git write-tree`.strip
    puts "Created tree   #{tsha}"
    if old_sha.size == 40
      csha = `git commit-tree #{tsha} -p #{old_sha} -m '#{mesg}'`.strip
    else
      csha = `git commit-tree #{tsha} -m '#{mesg}'`.strip
    end
    puts "Created commit #{csha}"
    puts `git show #{csha} --stat`
    puts "Updating gh-pages from #{old_sha}"
    `git update-ref refs/heads/gh-pages #{csha}`
    `git push origin gh-pages`
  end
end