Rakefile for Jekyll/Travis (work in progress)

gistfile1.txt

#############################################################################
#
# Modified version of jekyllrb Rakefile
# https://github.com/jekyll/jekyll/blob/master/Rakefile
#
#############################################################################

require 'rake'
require 'jekyll'
require 'date'
require 'git'

# read Jekyll configuration
config = Jekyll::Configuration::DEFAULTS
if File.exist? '_config.yml'
  config = config.merge(Jekyll::Configuration.new.read_config_file('_config.yml'))
end
@destination = config["destination"]

# read information from git repo
# source branch is the current branch
# destination branch is derived from source branch name
path = File.expand_path File.dirname(__FILE__)
repo = Git.open(path)

@source_branch = repo.branches.find { |b| b.name if b.current && b.remote.nil? }
@destination_branch = @source_branch == "master" ? "gh-pages" : "master"

@git_user = repo.config('user.name')
@git_email = repo.config('user.email')

@remote = repo.remote(:origin).url
@user_name = "mfenner"
@repo_name = "mfenner.github.io"

#############################################################################
#
# Helper functions
#
#############################################################################

# File activesupport/lib/active_support/inflector/transliterate.rb, line 80
def parameterize(string, sep = '-')
  # replace accented chars with their ascii
  # simplified from original to remove dependency
  parameterized_string = string.dup.force_encoding('US-ASCII')
  # Turn unwanted chars into the separator
  # changed from original: allow A-Z
  parameterized_string.gsub!(/[^a-zA-Z0-9\-_]+/, sep)
  unless sep.nil? || sep.empty?
    re_sep = Regexp.escape(sep)
    # No more than one of the separator in a row.
    parameterized_string.gsub!(/#{re_sep}{2,}/, sep)
    # Remove leading/trailing separator.
    parameterized_string.gsub!(/^#{re_sep}|#{re_sep}$/, '')
  end
  parameterized_string.downcase
end

def check_destination
  unless Dir.exist? @destination
    #@repo = Git.clone("https://#{ENV['GIT_NAME']}:#{ENV['GH_TOKEN']}@github.com/#{USERNAME}/#{REPO}.git", :path => DESTINATION)
    sh "git clone #{@remote} #{@destination}"
  end
end

#############################################################################
#
# Post and page tasks
#
#############################################################################

namespace :post do
  desc "Create a new post"
  task :create do
    title = ENV["title"] || "new-post"
    begin
      slug = parameterize(title)
      puts slug
    rescue => e
      puts "Error: invalid characters in title"
      exit -1
    end

    begin
      date = ENV['date'] ? Date.parse(ENV['date']) : Date.today
    rescue => e
      puts "Error: date format must be YYYY-MM-DD"
      exit -1
    end

    filename = File.join("_posts", "#{date}-#{slug}.md")
    if File.exist?(filename)
      puts "Error: post already exists"
      exit -1
    end

    header = { "layout" => "post", "title" => title }
    content = header.to_yaml + "---\n"

    if IO.write(filename, content)
      puts "Post #{filename} created"
    else
      puts "Error: #{filename} could not be written"
    end
  end
end

namespace :page do
  desc "Create a new page"
  task :create do
    title = ENV["title"] || "new-page"
    begin
      slug = parameterize(title)
      puts slug
    rescue => e
      puts "Error: invalid characters in title"
      exit -1
    end

    folder = ENV["folder"] || "."

    filename = File.join(folder, "#{slug}.md")
    if File.exist?(filename)
      puts "Error: page already exists"
      exit -1
    end

    header = { "layout" => "page", "title" => title }
    content = header.to_yaml + "---\n"

    if IO.write(filename, content)
      puts "Page #{filename} created"
    else
      puts "Error: #{filename} could not be written"
    end
  end
end

#############################################################################
#
# Site tasks
#
#############################################################################

namespace :site do
  desc "Generate the site"
  task :build do
    check_destination
    sh "bundle exec jekyll build"
  end

  desc "Generate the site and serve locally"
  task :serve do
    check_destination
    sh "bundle exec jekyll serve"
  end

  desc "Generate the site, serve locally and watch for changes"
  task :watch do
    sh "bundle exec jekyll serve --watch"
  end

  desc "Generate the site and push changes to remote origin"
  task :deploy do
    # Detect pull request
    if ENV['TRAVIS_PULL_REQUEST'].to_s.to_i > 0
      puts 'Pull request detected. Not proceeding with deploy.'
      exit
    end

    # Configure git if this is run in Travis CI
    if ENV["TRAVIS"]
      sh "git config --global user.name '#{@git_user}'"
      sh "git config --global user.email '#{@git_email}'"
      sh "git config --global push.default simple"
    end

    # Make sure destination folder exists as git repo
    check_destination

    sh "git checkout #{@source_branch}"
    Dir.chdir(@destination) { sh "git checkout #{@destination_branch}" }

    # Generate the site
    sh "bundle exec jekyll build"

    # Commit and push to github
    sha = `git log`.match(/[a-z0-9]{40}/)[0]
    Dir.chdir(@destination) do
      sh "git add --all ."
      sh "git commit -m 'Updating to #{@user_name}/#{@repo_name}@#{sha}.'"
      sh "git push origin #{@destination_branch}"
      puts "Pushed updated branch #{@destination_branch} to GitHub Pages"
    end
  end
end