Rakefile

# frozen_string_literal: true

require 'rake/testtask'
require 'rake/extensiontask'
require 'rake/clean'
require 'rbconfig'

NAME = 'edn_turbo'
LIB_DIR = "lib/#{NAME}"
EXT_BUNDLE = "#{LIB_DIR}/#{NAME}.#{RbConfig::CONFIG['DLEXT']}"

EXT_PATH               = "ext/#{NAME}"
RAGEL_PARSER_SRC       = 'edn_parser.rl'
RAGEL_PARSER_SRC_PATH  = "#{EXT_PATH}/#{RAGEL_PARSER_SRC}"
GEN_CC_PARSER_SRC      = 'edn_parser.cc'
GEN_CC_PARSER_SRC_PATH = "#{EXT_PATH}/#{GEN_CC_PARSER_SRC}"

task :irb do
  sh 'irb -I lib -r edn_turbo'
  sh 'reset'
end

task runthru: %i[clean default test]

Rake::ExtensionTask.new(NAME) do |extension|
  extension.lib_dir = LIB_DIR
  extension.source_pattern = '*.{cc,h}'
end

task :chmod do
  File.chmod(0o0775, EXT_BUNDLE)
end

CLEAN.include(['*.png', '*.gem'])

# ragel cc source generation
task ragel: GEN_CC_PARSER_SRC_PATH
file GEN_CC_PARSER_SRC_PATH => RAGEL_PARSER_SRC_PATH do
  Dir.chdir(EXT_PATH) do
    sh "ragel -G2 -o #{GEN_CC_PARSER_SRC} #{RAGEL_PARSER_SRC}"
    src = File.read(GEN_CC_PARSER_SRC).gsub(/[ \t]+$/, '')
    File.open(GEN_CC_PARSER_SRC, 'w') { |f| f.print src }
  end
end

# graph generation for testing machine output
task :graph, %i[machine] do |_t, args|
  args.with_defaults(machine: 'EDN_value')
  tmpfile = '/tmp/ragel_edn'
  machine = args[:machine]

  # assumes graphviz is installed
  sh "ragel -Vp -S #{machine} -o #{tmpfile} #{EXT_PATH}/#{RAGEL_PARSER_SRC} && " \
     "dot -Tpng #{tmpfile} -o #{machine}.png"
end

task build: %i[clean ragel compile chmod]

task default: :compile