format_command.rb

def remove_single_quote(query)
  # Remove single quote around file path when selecting from Alfred File Browser
  /^'.*'/.match?(query) ? query[1..-2] : query
end

def get_filepath(query)
  query = remove_single_quote(query)
  space_tilde_slash = /^\s*~\//
  if query.start_with?(space_tilde_slash)
    username = `whoami`.strip
    subpath = query.sub(space_tilde_slash, '').chomp
    "/Users/#{username}/#{subpath}"
  else
    query.gsub(/^\s*/, '')
  end
end

def get_script(query)
  filepath = get_filepath(query)
  if File.directory?(filepath)
    "cd \"#{filepath}\""
  else
    # Remove the single dollar sign in the beginning of each line.
    query.gsub(/^\s*\$\s+/, '')
  end
end

print get_script(ARGV[0])