convert.rb

require "shellwords"

# /Applications/calibre.app/Contents/MacOS/ebook-convert build/annabel-scheme-new-golden-gate/epub/annabel-scheme-new-golden-gate.epub annabel-scheme.azw3

Dir["build/epub/*epub"].each do |epub|
  basename = epub.split("/").last
  puts "Converting #{basename} to PDF"

  pdf_name = epub.gsub(".epub", ".pdf")
  `/Applications/calibre.app/Contents/MacOS/ebook-convert #{Shellwords.escape(epub)} #{Shellwords.escape(pdf_name)}`

  puts "Converting #{basename} to mobi"

  # Note: kindlegen doesn't want a path with the output filename
  mobi_name = epub.split("/").last.gsub(".epub", ".mobi")
  `./kindlegen #{Shellwords.escape(epub)} -c0 -verbose -o #{Shellwords.escape(mobi_name)}`

end