Rakefile

require 'time'
# Usage: rake post title="A Title" [date="2014-04-14"]
desc "Create a new post"
task :post do
  unless FileTest.directory?('./_posts')
    abort("rake aborted: '_posts' directory not found.")
  end
  title = ENV["title"] || "new-post"
  slug = title.downcase.strip.gsub(' ', '-').gsub(/[^\w-]/, '')
  begin
    date = (ENV['date'] ? Time.parse(ENV['date']) : Time.now)
    .strftime('%Y-%m-%d')
  rescue Exception => e
    puts "Error: date format must be YYYY-MM-DD!"
    exit -1
  end
  filename = File.join('.', '_posts', "#{date}-#{slug}.md")
  if File.exist?(filename)
    abort("rake aborted: #{filename} already exists.")
  end
  puts "Creating new post: #{filename}"
  open(filename, 'w') do |post|
    post.puts "---"
    post.puts "published: ture"
    post.puts "layout: post"
    post.puts "date: #{date}"
    post.puts "title: #{title.gsub(/-/,' ')}"
    post.puts "author: Yu"
    post.puts "category:"
    post.puts "tags:"
    post.puts "- "
    post.puts "- "
    post.puts "---"
  end
end