Open an octopress file in Emacs.

tj.el

;; on setup
(setq tj-name "/Users/morrita/work/trivials/tj.rb")

;;
;; Create and open the journal file
;;
(when (bound-and-true-p tj-name)
  (defun my-open-tj (given-title)
    (interactive "MTitle: ")
    (let ((welcome-page 
	   (find-file-noselect 
	    (shell-command-to-string 
	     (concat tj-name 
		     " " 
		     (if (string= given-title "")
			 "today" 
		       given-title))))))
      (switch-to-buffer welcome-page)))
  (define-key ctl-x-map "J" 'my-open-tj))

tj.rb

#!/usr/bin/env ruby

require "date"

Dir::chdir(File::join(ENV["HOME"], "work/octopress"))

if (ARGV[0] == "--pub")
  system("bash -l -c 'rvm use 1.9.2 && rake generate deploy'")
  exit
end

title = ARGV[0]
pattern = Date.today.strftime("source/_posts/%Y-%m-%d-*.markdown")
existing = Dir.glob(pattern)
if existing.empty?
  IO.popen("bash -l", "r+") do |io|
    io.write("rvm use 1.9.2\n")
    io.write("rake new_post['" + title + "']\n")
    io.write("exit\n")
    io.readlines
  end

  existing = Dir.glob(pattern)
end

print File::expand_path(existing[-1])