build

#!/usr/bin/env ruby

require 'fileutils'

chapter_filenames = File.read('contents.txt').split("\n")

base_dir = '_generated'
leanpub_dir = File.join base_dir, 'leanpub'
pandoc_dir = File.join base_dir, 'pandoc'

FileUtils.mkdir_p leanpub_dir
FileUtils.mkdir_p pandoc_dir

# write Book.txt from contents.txt
# AP: I'm not sure if this is bulletproof if we rename chapters,
# but let's try this for now
unless File.read('Book.txt').split("\n").length == chapter_filenames.length
  File.open('Book.txt', 'w') do |book|
    chapter_filenames.each do |chapter_filename|
      book.puts File.join(leanpub_dir, chapter_filename)
    end
  end
end

# copy over files for image insertion
chapter_filenames.each do |chapter_filename|
  FileUtils.cp chapter_filename, leanpub_dir
end

# copy over modified files for futher pandoc processing
chapter_filenames.each do |chapter_filename|
  FileUtils.cp File.join(leanpub_dir, chapter_filename), pandoc_dir
end

# pandoc post-processing
chapter_filenames.each do |chapter_filename|
  File.open(File.join(pandoc_dir, chapter_filename), 'a') do |f|
    f.puts "\nEND OF PANDOC CHAPTER"
    f.puts "\n\\pagebreak"
  end
end

# stitch the current book into a PDF, sending any errors to the ether

File.open("#{base_dir}/Book.txt", 'w') do |book|
  chapter_filenames.each do |chapter_filename|
    book.puts File.join(pandoc_dir, chapter_filename)
  end
end

`cat #{base_dir}/Book.txt | xargs pandoc \
  --smart \
  --table-of-contents \
  --output=local-preview.pdf`