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require 'erb'
MAIL_ROOT = File.expand_path("../..", __FILE__)
require "#{MAIL_ROOT}/lib/mail/parsers/ragel/parser_info"
namespace :ragel do
# Ruby Parsers
RB_DIR = "#{MAIL_ROOT}/lib/mail/parsers/ragel/ruby"
RB_RAGEL_TEMPLATE = "#{RB_DIR}/parser.rb.rl.erb"
def generate_rb_ragel_file(parser_name)
parser_name_cc = parser_name.gsub('parser','machine').split('_').map{|e| e.capitalize}.join + "Machine"
ragel_rb_source_template = ERB.new(IO.read(RB_RAGEL_TEMPLATE))
ragel_rb_source_template.result(binding)
end
RB_GEN_DIR = "#{RB_DIR}/machines"
directory RB_GEN_DIR
RB_ACTIONS = "#{RB_GEN_DIR}/rb_actions.rl"
file RB_ACTIONS do
actions = Mail::Parsers::Ragel::ACTIONS.each_with_index.map do |action,idx|
"action #{action} { actions.push(#{idx}, p) }"
end.join("\n")
actions_rl = "%%{\nmachine rb_actions;\n#{actions}\n}%%"
File.open(RB_ACTIONS,"w+") { |f| f.write actions_rl }
end
RB_RAGEL_PARSERS = []
Mail::Parsers::Ragel::FIELD_PARSERS.each do |p|
path = "#{RB_GEN_DIR}/#{p}_machine.rb.rl"
RB_RAGEL_PARSERS << path
file path do
File.open(path, "w+") { |f| f.write(generate_rb_ragel_file(p)) }
end
end
RB_RAGEL_FILES = [RB_GEN_DIR, RB_ACTIONS] + RB_RAGEL_PARSERS
task :generate_ragel_files => RB_RAGEL_FILES
RB_PARSERS = []
RB_RAGEL_PARSERS.each do |ragel_path|
path = ragel_path.gsub(".rl", "")
RB_PARSERS << path
file path do
`ragel -sR -F1 -o #{path} #{ragel_path}`
end
end
task :generate_ruby_parsers => RB_PARSERS
desc "Generate ruby parsers from ragel files"
task :generate => [:generate_ragel_files, :generate_ruby_parsers]
end
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