Edit Octopress post

task.rb

desc "Edit a post (defaults to most recent)"
task :edit_post, :title do |t, args|
  args.with_defaults(:title => false)
  posts = Dir.glob("#{source_dir}/#{posts_dir}/*.*")
  post = (args.title) ? post = posts.keep_if {|post| post =~ /#{args.title}/}.last : posts.last
  if post
    puts "Opening #{post} with #{editor}..."
    system "#{ENV['EDITOR']} #{post} &"
  else
    puts "No posts were found with \"#{args.title}\" in the title."
  end
end

Pesonally I added a task to my Rakefile:

desc "Open newly generated post in Emacs"
task :edit, :filename do |t, args|
  puts "Opening post in Emacs"
    `emacsclient -n #{args.filename}`
end

You could replace emacsclient -n with an editor variable at the top of the Rakefile (like ssh_user or deploy_branch). Also adding the globbing as a default if there is no args.filename would be easy, but personally I modified new_post and added Rake::Task["edit"].invoke(filename).