My Jekyll Rake tasks

Rakefile

# Rake tasks for Jekyll
# Inspired by https://github.com/imathis/octopress/blob/master/Rakefile

require 'rake/clean'
require 'redcloth'
require 'stringex'

POSTS_DIR = '_posts'
BUILD_DIR = '_site'
DEPLOY_DIR = '_deploy'
DEPLOY_BRANCH = 'master'

CLEAN.include BUILD_DIR
CLOBBER.include DEPLOY_DIR

desc 'Build the site'
task :build do
  sh 'jekyll', 'build'
end

desc 'Start web server to preview site'
task :preview do
  sh 'jekyll', 'serve', '--watch', '--drafts',
     '--port', ENV.fetch('PORT', '4000')
end

desc 'Create a new draft'
task :new_draft, :title do |t, args|
  title = args[:title] || 'New Draft'
  filename = File.join('_drafts', "#{title.to_url}.md")

  puts "==> Creating new draft: #{filename}"
  open(filename, 'w') do |f|
    f << "---\n"
    f << "layout: post\n"
    f << "title: \"#{title.to_html(true)}\"\n"
    f << "comments: false\n"
    f << "categories:\n"
    f << "---\n"
    f << "\n"
    f << "Add awesome content here.\n"
  end
end

desc 'Create a new post'
task :new_post, :title do |t, args|
  title = args[:title] || 'New Post'
  timestamp = Time.now.strftime('%Y-%m-%d')
  filename = File.join(POSTS_DIR, "#{timestamp}-#{title.to_url}.md")

  puts "==> Creating new post: #{filename}"
  open(filename, 'w') do |f|
    f.write "---\n"
    f.write "layout: post\n"
    f.write "title: \"#{title.to_html(true)}\"\n"
    f.write "categories:\n"
    f.write "---\n"
    f.write "\n"
    f.write "Add awesome post content here.\n"
  end
end

desc 'Create a new page'
task :new_page, :title do |t, args|
  title = args[:title] || 'New Page'
  filename = File.join(title.to_url, 'index.md')

  puts "==> Creating new page: #{filename}"
  mkdir_p title.to_url
  open(filename, 'w') do |f|
    f.write "---\n"
    f.write "layout: page\n"
    f.write "title: \"#{title.to_html(true)}\"\n"
    f.write "---\n"
    f.write "\n"
    f.write "Add awesome page content here.\n"
  end
end

def git(*args)
  sh 'git', *args
end

desc 'Deploy the site via Git'
task :deploy => :build do
  repo_url = `git config jekyll.deployurl`.chomp
  if repo_url.empty?
    abort 'error: set git repo url via `git config jekyll.deployurl` first'
  end

  if File.directory?(DEPLOY_DIR)
    rm_rf Dir["#{DEPLOY_DIR}/*"]
  else
    mkdir_p DEPLOY_DIR
  end

  if File.directory?(File.join(DEPLOY_DIR, '.git'))
    puts "==> Updating Git repository in #{DEPLOY_DIR} ..."
    cd DEPLOY_DIR do
      git 'fetch', '--prune'
      git 'reset', '--hard', "origin/#{DEPLOY_BRANCH}"
    end
  else
    puts "==> Cloning Git repository into #{DEPLOY_DIR} ..."
    git 'clone', '--branch', DEPLOY_BRANCH, repo_url, DEPLOY_DIR
  end

  puts "==> Copying files from #{BUILD_DIR} to #{DEPLOY_DIR} ..."
  cp_r Dir["#{BUILD_DIR}/*"], DEPLOY_DIR

  cd DEPLOY_DIR do
    puts '==> Pushing changes to remote Git repository...'
    git 'add', '--all'
    git 'commit', '--message', "Site updated at #{Time.now}"
    git 'push', 'origin', DEPLOY_BRANCH
  end

  puts '==> Site successfully deployed.'
end

task :default => :build