#  Phusion Passenger - https://www.phusionpassenger.com/
#  Copyright (c) 2010-2015 Phusion
#
#  "Phusion Passenger" is a trademark of Hongli Lai & Ninh Bui.
#
#  Permission is hereby granted, free of charge, to any person obtaining a copy
#  of this software and associated documentation files (the "Software"), to deal
#  in the Software without restriction, including without limitation the rights
#  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#  copies of the Software, and to permit persons to whom the Software is
#  furnished to do so, subject to the following conditions:
#
#  The above copyright notice and this permission notice shall be included in
#  all copies or substantial portions of the Software.
#
#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
#  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
#  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
#  THE SOFTWARE.

PhusionPassenger.require_passenger_lib 'platform_info/compiler'
PhusionPassenger.require_passenger_lib 'platform_info/cxx_portability'

########## Phusion Passenger common library ##########

PhusionPassenger.require_passenger_lib 'common_library'


########## libboost_oxt ##########

# Defines tasks for compiling a static library containing Boost and OXT.
def define_libboost_oxt_task(namespace, output_dir, extra_compiler_flags = nil)
  output_file = "#{output_dir}.a"
  flags = "-Iext #{extra_compiler_flags} #{EXTRA_CXXFLAGS}"

  if OPTIMIZE
    optimize = "-O2"
    if LTO
      optimize << " -flto"
    end
  end

  # Define compilation targets for .cpp files in ext/boost/src/pthread.
  boost_object_files = []
  Dir['ext/boost/libs/**/*.cpp'].each do |source_file|
    object_name = File.basename(source_file.sub(/\.cpp$/, '.o'))
    boost_output_dir  = "#{output_dir}/boost"
    object_file = "#{boost_output_dir}/#{object_name}"
    boost_object_files << object_file

    file object_file => source_file do
      sh "mkdir -p #{boost_output_dir}" if !File.directory?(boost_output_dir)
      compile_cxx(source_file, "#{optimize} #{flags} -o #{object_file}")
    end
  end

  # Define compilation targets for .cpp files in ext/oxt.
  oxt_object_files = []
  oxt_dependency_files = Dir["ext/oxt/*.hpp"] + Dir["ext/oxt/detail/*.hpp"]
  Dir['ext/oxt/*.cpp'].each do |source_file|
    object_name = File.basename(source_file.sub(/\.cpp$/, '.o'))
    oxt_output_dir  = "#{output_dir}/oxt"
    object_file = "#{oxt_output_dir}/#{object_name}"
    oxt_object_files << object_file

    file object_file => [source_file, *oxt_dependency_files] do
      sh "mkdir -p #{oxt_output_dir}" if !File.directory?(oxt_output_dir)
      compile_cxx(source_file, "#{optimize} #{flags} -o #{object_file}".strip)
    end
  end

  object_files = boost_object_files + oxt_object_files

  file(output_file => object_files) do
    sh "mkdir -p #{output_dir}"
    create_static_library(output_file, object_files.join(' '))
  end

  task "#{namespace}:clean" do
    sh "rm -rf #{output_file} #{output_dir}"
  end

  if OPTIMIZE && LTO
    # Clang -flto does not support static libraries containing
    # .o files that are compiled with -flto themselves.
    [output_file, Dir["#{output_dir}/*/*.o"].join(" ")]
  else
    [output_file, output_file]
  end
end


########## libev ##########

if USE_VENDORED_LIBEV
  LIBEV_SOURCE_DIR = File.expand_path("../ext/libev", File.dirname(__FILE__)) + "/"
  LIBEV_CFLAGS = "-Iext/libev"
  LIBEV_LIBS = LIBEV_OUTPUT_DIR + ".libs/libev.a"
  LIBEV_TARGET = LIBEV_LIBS

  task :libev => LIBEV_TARGET

  dependencies = [
    "ext/libev/configure",
    "ext/libev/config.h.in",
    "ext/libev/Makefile.am"
  ]
  file LIBEV_OUTPUT_DIR + "Makefile" => dependencies do
    cc = CC
    cxx = CXX
    if OPTIMIZE && LTO
      cc = "#{cc} -flto"
      cxx = "#{cxx} -flto"
    end
    # Disable all warnings: http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#COMPILER_WARNINGS
    cflags = "#{EXTRA_CFLAGS} -w"
    sh "mkdir -p #{LIBEV_OUTPUT_DIR}" if !File.directory?(LIBEV_OUTPUT_DIR)
    sh "cd #{LIBEV_OUTPUT_DIR} && sh #{LIBEV_SOURCE_DIR}configure " +
      "--disable-shared --enable-static " +
      # libev's configure script may select a different default compiler than we
      # do, so we force our compiler choice.
      "CC='#{cc}' CXX='#{cxx}' CFLAGS='#{cflags}' orig_CFLAGS=1"
  end

  libev_sources = Dir["ext/libev/{*.c,*.h}"]
  file LIBEV_OUTPUT_DIR + ".libs/libev.a" => [LIBEV_OUTPUT_DIR + "Makefile"] + libev_sources do
    sh "rm -f #{LIBEV_OUTPUT_DIR}libev.la"
    sh "cd #{LIBEV_OUTPUT_DIR} && make libev.la"
  end

  task 'libev:clean' do
    patterns = %w(Makefile config.h config.log config.status libtool
      stamp-h1 *.o *.lo *.la .libs .deps)
    patterns.each do |pattern|
      sh "rm -rf #{LIBEV_OUTPUT_DIR}#{pattern}"
    end
  end

  task :clean => 'libev:clean'
else
  LIBEV_CFLAGS = string_option('LIBEV_CFLAGS', '-I/usr/include/libev')
  LIBEV_LIBS   = string_option('LIBEV_LIBS', '-lev')
  LIBEV_TARGET = nil
  task :libev  # do nothing
end

# Apple Clang 4.2 complains about ambiguous member templates in ev++.h.
LIBEV_CFLAGS << " -Wno-ambiguous-member-template" if PlatformInfo.compiler_supports_wno_ambiguous_member_template?


########## libeio ##########

if USE_VENDORED_LIBEIO
  LIBEIO_SOURCE_DIR = File.expand_path("../ext/libeio", File.dirname(__FILE__)) + "/"
  LIBEIO_CFLAGS = "-Iext/libeio"
  LIBEIO_LIBS = LIBEIO_OUTPUT_DIR + ".libs/libeio.a"
  LIBEIO_TARGET = LIBEIO_LIBS

  task :libeio => LIBEIO_TARGET

  dependencies = [
    "ext/libeio/configure",
    "ext/libeio/config.h.in",
    "ext/libeio/Makefile.am"
  ]
  file LIBEIO_OUTPUT_DIR + "Makefile" => dependencies do
    cc = CC
    cxx = CXX
    if OPTIMIZE && LTO
      cc = "#{cc} -flto"
      cxx = "#{cxx} -flto"
    end
    # Disable all warnings. The author has a clear standpoint on that:
    # http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#COMPILER_WARNINGS
    cflags = "#{EXTRA_CFLAGS} -w"
    sh "mkdir -p #{LIBEIO_OUTPUT_DIR}" if !File.directory?(LIBEIO_OUTPUT_DIR)
    sh "cd #{LIBEIO_OUTPUT_DIR} && sh #{LIBEIO_SOURCE_DIR}configure " +
      "--disable-shared --enable-static " +
      # libeio's configure script may select a different default compiler than we
      # do, so we force our compiler choice.
      "CC='#{cc}' CXX='#{cxx}' CFLAGS='#{cflags}'"
  end

  libeio_sources = Dir["ext/libeio/{*.c,*.h}"]
  file LIBEIO_OUTPUT_DIR + ".libs/libeio.a" => [LIBEIO_OUTPUT_DIR + "Makefile"] + libeio_sources do
    sh "rm -f #{LIBEIO_OUTPUT_DIR}/libeio.la"
    sh "cd #{LIBEIO_OUTPUT_DIR} && make libeio.la"
  end

  task 'libeio:clean' do
    patterns = %w(Makefile config.h config.log config.status libtool
      stamp-h1 *.o *.lo *.la .libs .deps)
    patterns.each do |pattern|
      sh "rm -rf #{LIBEIO_OUTPUT_DIR}#{pattern}"
    end
  end

  task :clean => 'libeio:clean'
else
  LIBEIO_CFLAGS = string_option('LIBEIO_CFLAGS', '-I/usr/include/libeio')
  LIBEIO_LIBS   = string_option('LIBEIO_LIBS', '-leio')
  LIBEIO_TARGET = nil
  task :libeio  # do nothing
end


########## Shared definitions ##########
# Shared definition files should be in source control so that they don't
# have to be built by users. Users may not have write access to the source
# root, for example as is the case with Passenger Standalone.
#
# If you add a new shared definition file, don't forget to update
# lib/phusion_passenger/packaging.rb!

dependencies = ['ext/common/Constants.h.erb', 'lib/phusion_passenger.rb', 'lib/phusion_passenger/constants.rb']
file 'ext/common/Constants.h' => dependencies do
  PhusionPassenger.require_passenger_lib 'constants'
  template = TemplateRenderer.new('ext/common/Constants.h.erb')
  template.render_to('ext/common/Constants.h')
end


##############################


libboost_oxt_cflags = ""
libboost_oxt_cflags << " #{PlatformInfo.adress_sanitizer_flag}" if USE_ASAN
libboost_oxt_cflags.strip!
LIBBOOST_OXT, LIBBOOST_OXT_LINKARG =
  define_libboost_oxt_task("common", COMMON_OUTPUT_DIR + "libboost_oxt", libboost_oxt_cflags)
COMMON_LIBRARY.enable_optimizations!(LTO) if OPTIMIZE
COMMON_LIBRARY.define_tasks(libboost_oxt_cflags)
