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require 'rubygems/tasks'
require 'rbconfig'
require 'rake/clean'
require File.expand_path("./lib/ffi/version")

USE_RAKE_COMPILER = (RUBY_PLATFORM =~ /java/) ? false : true
if USE_RAKE_COMPILER
  require 'rake/extensiontask'
end

require 'date'
require 'fileutils'
require 'rbconfig'
require 'rspec/core/rake_task'
require 'rubygems/package_task'

LIBEXT = case RbConfig::CONFIG['host_os'].downcase
  when /darwin/
    "dylib"
  when /mswin|mingw/
    "dll"
  else
    RbConfig::CONFIG['DLEXT']
  end

CPU = case RbConfig::CONFIG['host_cpu'].downcase
  when /i[3456]86/
    # Darwin always reports i686, even when running in 64bit mode
    if RbConfig::CONFIG['host_os'] =~ /darwin/ && 0xfee1deadbeef.is_a?(Fixnum)
      "x86_64"
    else
      "i386"
    end

  when /amd64|x86_64/
    "x86_64"

  when /ppc64|powerpc64/
    "powerpc64"

  when /ppc|powerpc/
    "powerpc"

  when /^arm/
    "arm"

  else
    RbConfig::CONFIG['host_cpu']
  end

OS = case RbConfig::CONFIG['host_os'].downcase
  when /linux/
    "linux"
  when /darwin/
    "darwin"
  when /freebsd/
    "freebsd"
  when /openbsd/
    "openbsd"
  when /sunos|solaris/
    "solaris"
  when /mswin|mingw/
    "win32"
  else
    RbConfig::CONFIG['host_os'].downcase
  end

def which(name)
  exts = ENV['PATHEXT'] ? ENV['PATHEXT'].split(';') : ['']
  ENV['PATH'].split(File::PATH_SEPARATOR).each do |path|
    exts.each do |ext|
      app = File.join(path, name+ext)
      return app if File.executable? app
    end
  end
  nil
end

GMAKE = which('gmake').nil? ? 'make' : 'gmake'

LIBTEST = "build/libtest.#{LIBEXT}"
BUILD_DIR = "build"
BUILD_EXT_DIR = File.join(BUILD_DIR, "#{RbConfig::CONFIG['arch']}", 'ffi_c', RUBY_VERSION)

def gem_spec
  @gem_spec ||= Gem::Specification.load('ffi.gemspec')
end

TEST_DEPS = [ LIBTEST ]
if RUBY_PLATFORM == "java"
  RSpec::Core::RakeTask.new(:spec) do |config|
    config.rspec_opts = YAML.load_file 'spec/spec.opts'
  end
else
  RSpec::Core::RakeTask.new(:spec => :compile) do |config|
    config.rspec_opts = YAML.load_file 'spec/spec.opts'
  end

  TEST_DEPS.unshift :compile
end

desc "Build all packages"
task :package => %w[ gem:java gem:windows ]

CLOBBER.include 'lib/ffi/types.conf'
CLOBBER.include 'pkg'
CLOBBER.include 'log'

CLEAN.include 'build'
CLEAN.include 'conftest.dSYM'
CLEAN.include 'spec/ffi/fixtures/libtest.{dylib,so,dll}'
CLEAN.include 'spec/ffi/fixtures/*.o'
CLEAN.include "pkg/ffi-*-{mingw32,java}"
CLEAN.include 'lib/1.*'
CLEAN.include 'lib/2.*'
CLEAN.include 'bin'

task :distclean => :clobber

desc "Build the native test lib"
file "build/libtest.#{LIBEXT}" => FileList['libtest/**/*.[ch]'] do
  sh %{#{GMAKE} -f libtest/GNUmakefile CPU=#{CPU} OS=#{OS} }
end


desc "Build test helper lib"
task :libtest => "build/libtest.#{LIBEXT}"

desc "Test the extension"
task :test => [ :spec ]


namespace :bench do
  ITER = ENV['ITER'] ? ENV['ITER'].to_i : 100000
  bench_libs = "-Ilib -I#{BUILD_DIR}" unless RUBY_PLATFORM == "java"
  bench_files = Dir["bench/bench_*.rb"].reject { |f| f == "bench_helper.rb" }
  bench_files.each do |bench|
    task File.basename(bench, ".rb")[6..-1] => TEST_DEPS do
      sh %{#{Gem.ruby} #{bench_libs} #{bench} #{ITER}}
    end
  end
  task :all => TEST_DEPS do
    bench_files.each do |bench|
      sh %{#{Gem.ruby} #{bench_libs} #{bench}}
    end
  end
end

task 'spec:run' => TEST_DEPS
task 'spec:specdoc' => TEST_DEPS

task :default => :spec

namespace 'java' do

  java_gem_spec = Gem::Specification.new do |s|
    s.name = gem_spec.name
    s.version = gem_spec.version
    s.author = gem_spec.author
    s.email = gem_spec.email
    s.homepage = gem_spec.homepage
    s.summary = gem_spec.summary
    s.description = gem_spec.description
    s.files = %w(LICENSE COPYING README.md CHANGELOG.md Rakefile)
    s.license = gem_spec.license
    s.platform = 'java'
  end

  Gem::PackageTask.new(java_gem_spec) do |pkg|
    pkg.need_zip = true
    pkg.need_tar = true
    pkg.package_dir = 'pkg'
  end
end

task 'gem:java' => 'java:gem'


if USE_RAKE_COMPILER
  Rake::ExtensionTask.new('ffi_c', gem_spec) do |ext|
    ext.name = 'ffi_c'                                        # indicate the name of the extension.
    # ext.lib_dir = BUILD_DIR                                 # put binaries into this folder.
    ext.tmp_dir = BUILD_DIR                                   # temporary folder used during compilation.
    ext.cross_compile = true                                  # enable cross compilation (requires cross compile toolchain)
    ext.cross_platform = %w[i386-mingw32 x64-mingw32]                     # forces the Windows platform instead of the default one
    ext.cross_compiling do |spec|
      spec.files.reject! { |path| File.fnmatch?('ext/*', path) }
    end
  end

  # To reduce the gem file size strip mingw32 dlls before packaging
  ENV['RUBY_CC_VERSION'].to_s.split(':').each do |ruby_version|
    task "build/i386-mingw32/stage/lib/#{ruby_version[/^\d+\.\d+/]}/ffi_c.so" do |t|
      sh "i686-w64-mingw32-strip -S build/i386-mingw32/stage/lib/#{ruby_version[/^\d+\.\d+/]}/ffi_c.so"
    end

    task "build/x64-mingw32/stage/lib/#{ruby_version[/^\d+\.\d+/]}/ffi_c.so" do |t|
      sh "x86_64-w64-mingw32-strip -S build/x64-mingw32/stage/lib/#{ruby_version[/^\d+\.\d+/]}/ffi_c.so"
    end
  end
end

desc "build a windows gem without all the ceremony"
task "gem:windows" do
  require "rake_compiler_dock"
  sh "bundle package"
  RakeCompilerDock.sh "sudo apt-get update && sudo apt-get install -y libltdl-dev && bundle --local && rake cross native gem MAKE='nice make -j`nproc`'"
end

directory "ext/ffi_c/libffi"
file "ext/ffi_c/libffi/autogen.sh" => "ext/ffi_c/libffi" do
  warn "Downloading libffi ..."
  sh "git submodule update --init --recursive"
end

LIBFFI_GIT_FILES = `git --git-dir ext/ffi_c/libffi/.git ls-files -z`.split("\x0")

# Generate files in gemspec but not in libffi's git repo by running autogen.sh
gem_spec.files.select do |f|
  f =~ /ext\/ffi_c\/libffi\/(.*)/ && !LIBFFI_GIT_FILES.include?($1)
end.each do |f|
  file f => "ext/ffi_c/libffi/autogen.sh" do
    chdir "ext/ffi_c/libffi" do
      sh "sh ./autogen.sh"
    end
    touch f
    if gem_spec.files != Gem::Specification.load('./ffi.gemspec').files
      warn "gemspec files have changed -> Please restart rake!"
      exit 1
    end
  end
end

$LOAD_PATH.unshift File.join(File.dirname(__FILE__), 'lib')
require 'ffi/platform'
types_conf = File.expand_path(File.join(FFI::Platform::CONF_DIR, 'types.conf'))
logfile = File.join(File.dirname(__FILE__), 'types_log')

file types_conf => File.join("lib", "ffi", "version.rb") do |task|
  require 'fileutils'
  require 'ffi/tools/types_generator'
  options = {}
  FileUtils.mkdir_p(File.dirname(task.name), { :mode => 0755 })
  File.open(task.name, File::CREAT|File::TRUNC|File::RDWR, 0644) do |f|
    f.puts FFI::TypesGenerator.generate(options)
  end
  File.open(logfile, 'w') do |log|
    log.puts(types_conf)
  end
end

task :types_conf => types_conf do
end

Gem::Tasks.new do |t|
  t.scm.tag.format = '%s'
end

begin
  require 'yard'

  namespace :doc do
    YARD::Rake::YardocTask.new do |yard|
    end
  end
rescue LoadError
  warn "[warn] YARD unavailable"
end