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#!/usr/bin/env ruby
#  Phusion Passenger - https://www.phusionpassenger.com/
#  Copyright (c) 2010-2017 Phusion Holding B.V.
#
#  "Passenger", "Phusion Passenger" and "Union Station" are registered
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#  The above copyright notice and this permission notice shall be included in
#  all copies or substantial portions of the Software.
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#  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
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#  THE SOFTWARE.

ESSENTIALS = [
  "boost/*regex*",
  "boost/algorithm/string",
  "boost/asio*",
  "boost/atomic",
  "boost/bind",
  "boost/chrono*",
  "boost/config*",
  "boost/container",
  "boost/core",
  "boost/cstdint.hpp",
  "boost/date_time",
  "boost/date_time/date_formatting_limited.hpp",
  "boost/date_time/gregorian/formatters_limited.hpp",
  "boost/detail/fenv.hpp",
  "boost/detail/reference_content.hpp",
  "boost/foreach.hpp",
  "boost/function",
  "boost/integer*",
  "boost/intrusive",
  "boost/move",
  "boost/mpl",
  "boost/non_type.hpp",
  "boost/none*",
  "boost/optional",
  "boost/optional.hpp",
  "boost/parameter",
  "boost/pool",
  "boost/predef",
  "boost/predef/other/endian.h",
  "boost/preprocessor",
  "boost/preprocessor/stringize.hpp",
  "boost/random*",
  "boost/ratio*",
  "boost/smart_ptr/detail/atomic_count*",
  "boost/smart_ptr/detail/sp_counted_*",
  "boost/smart_ptr/detail/spinlock*",
  "boost/system/config.hpp",
  "boost/system/detail/error_code.ipp",
  "boost/thread",
  "boost/type_traits",
  "boost/type_traits/detail/*",
  "boost/type_traits/make_signed.hpp",
  "boost/typeof",
  "boost/unordered*",
  "boost/utility",
  "libs/chrono/src",
  "libs/random/src",
  "libs/regex/src",
  "libs/system/src",
  "libs/thread/src",
]
EXCLUDE = [
  "libs/thread/src/win32/*",
  "libs/regex/src/w32_regex_traits.cpp",
  "libs/regex/src/fileiter.cpp",
  "libs/regex/src/icu.cpp",
  "libs/regex/src/usinstances.cpp",
  "boost/atomic/detail/windows.hpp",
  "boost/regex/icu.hpp",
  "boost/asio/detail/win*",
  "boost/asio/detail/impl/win*"
]
PROGRAM_SOURCE = %q{
  #include <boost/aligned_storage.hpp>
  #include <boost/asio.hpp>
  #include <boost/asio/ssl.hpp>
  #include <boost/asio/steady_timer.hpp>
  #include <boost/atomic.hpp>
  #include <boost/bind/bind.hpp>
  #include <boost/chrono.hpp>
  #include <boost/circular_buffer.hpp>
  #include <boost/config.hpp>
  #include <boost/container/small_vector.hpp>
  #include <boost/container/vector.hpp>
  #include <boost/core/noncopyable.hpp>
  #include <boost/cstdint.hpp>
  #include <boost/current_function.hpp>
  #include <boost/date_time/posix_time/posix_time.hpp>
  #include <boost/date_time/posix_time/posix_time_types.hpp>
  #include <boost/enable_shared_from_this.hpp>
  #include <boost/foreach.hpp>
  #include <boost/function.hpp>
  #include <boost/intrusive_ptr.hpp>
  #include <boost/make_shared.hpp>
  #include <boost/move/core.hpp>
  #include <boost/move/move.hpp>
  #include <boost/move/utility.hpp>
  #include <boost/noncopyable.hpp>
  #include <boost/nondet_random.hpp>
  #include <boost/pointer_cast.hpp>
  #include <boost/pool/object_pool.hpp>
  #include <boost/predef.h>
  #include <boost/predef/other/endian.h>
  #include <boost/random/random_device.hpp>
  #include <boost/random/uniform_int_distribution.hpp>
  #include <boost/ref.hpp>
  #include <boost/regex.hpp>
  #include <boost/scoped_array.hpp>
  #include <boost/scoped_ptr.hpp>
  #include <boost/shared_array.hpp>
  #include <boost/shared_ptr.hpp>
  #include <boost/smart_ptr/intrusive_ref_counter.hpp>
  #include <boost/static_assert.hpp>
  #include <boost/system/error_code.hpp>
  #include <boost/system/system_error.hpp>
  #include <boost/thread.hpp>
  #include <boost/thread/condition_variable.hpp>
  #include <boost/thread/mutex.hpp>
  #include <boost/thread/once.hpp>
  #include <boost/thread/tss.hpp>
  #include <boost/typeof/typeof.hpp>
  #include <boost/unordered_map.hpp>
  #include <boost/version.hpp>
  #include <boost/weak_ptr.hpp>
// Included despite not used in Passenger
  #include <boost/thread/thread_time.hpp>
  #include <boost/cregex.hpp>
  #include <boost/pointer_cast.hpp>
  #include <boost/asio.hpp>
}

require 'fileutils'
BOOST_DIR = ARGV[0]
Dir.chdir(File.dirname(__FILE__) + "/../src/cxx_supportlib/vendor-modified")

# Run the given command, and abort on error.
def sh(*command)
  puts command.join(" ")
  if !system(*command)
    puts "*** ERROR"
    exit 1
  end
end

def install(source_filename, target_filename)
  dir = File.dirname(target_filename)
  if !File.exist?(dir)
    sh "mkdir", "-p", dir
  end
  command = ["install", "-m", "u+rw,g+r,o+r", source_filename, target_filename]
  sh(*command)
end

def copy_boost_files(patterns, exclude = nil)
  patterns.each do |pattern|
    files = Dir["#{BOOST_DIR}/#{pattern}"]
    files -= exclude if exclude
    files.each do |source|
      if File.directory?(source)
        source.slice!(0 .. BOOST_DIR.size)
        copy_boost_files(["#{source}/*"], exclude)
      else
        target = source.slice(BOOST_DIR.size + 1 .. source.size - 1)
        if target =~ /^libs\//
          target = "boost/#{target}"
        end
        if !File.exist?(target)
          install(source, target)
        end
      end
    end
  end
end

def copy_essential_files
  exclude = []
  EXCLUDE.each do |pattern|
    exclude.concat(Dir["#{BOOST_DIR}/#{pattern}"])
  end
  copy_boost_files(ESSENTIALS, exclude)
end

def prepare
  File.open("test.cpp", "w") do |f|
    f.write(PROGRAM_SOURCE)
  end
end

def cleanup
  FileUtils.rm_rf("boost/asio/detail/old_win_sdk_compat.hpp")
  FileUtils.rm_rf("boost/asio/win32")
  FileUtils.rm_rf("boost/asio/windows")
  FileUtils.rm_rf("boost/atomic/detail/caps_windows.hpp")
  FileUtils.rm_rf("boost/atomic/detail/core_ops_windows.hpp")
  FileUtils.rm_rf("boost/atomic/detail/fence_ops_windows.hpp")
  FileUtils.rm_rf("boost/atomic/detail/ops_windows.hpp")
  FileUtils.rm_rf("boost/atomic/detail/wait_caps_windows.hpp")
  FileUtils.rm_rf("boost/atomic/detail/wait_ops_windows.hpp")
  FileUtils.rm_rf("boost/chrono/detail/inlined/win")
  FileUtils.rm_rf("boost/config/platform/cygwin.hpp")
  FileUtils.rm_rf("boost/config/platform/win32.hpp")
  FileUtils.rm_rf("boost/core/detail/sp_win32_sleep.hpp")
  FileUtils.rm_rf("boost/smart_ptr/detail/atomic_count_win32.hpp")
  FileUtils.rm_rf("boost/smart_ptr/detail/sp_counted_base_w32.hpp")
  FileUtils.rm_rf("boost/smart_ptr/detail/spinlock_w32.hpp")
  FileUtils.rm_rf("boost/src/win32")
  FileUtils.rm_rf("boost/thread/win32")
  File.unlink("test.cpp") rescue nil
end

# Compile PROGRAM_SOURCE and copy whatever missing header files the compiler needs.
def copy_dependencies(cflags)
  if RUBY_PLATFORM =~ /darwin/
    openssl_path = `brew --prefix openssl`.strip
  else
    openssl_path = '/usr/include/openssl'
  end
  done = false
  while !done
    compiler_output = `c++ test.cpp -c -I#{openssl_path}/include -I. -I.. #{cflags.join(" ")} 2>&1`
    File.unlink('test.o') if File.exist?('test.o')
    missing_headers = compiler_output.
                        split("\n").
                        grep(/(error: .*: No such file|fatal error: '.*' file not found)/).
                        reject{|s| s =~ /\/usr\/include\// }.
                        map do |line|
      if line =~ /error: (.*): No such file/
        file = $1
      elsif line =~ /fatal error: '(.*)' file not found/
        file = $1
      else
        abort "Bug"
      end
      if file =~ /^boost\//
        file
      else
        line =~ /(.*?):/
        source = $1
        File.dirname(source) + "/" + file
      end
    end
    missing_headers.each do |header|
      install("#{BOOST_DIR}/#{header}", header)
    end
    done = missing_headers.empty?
  end
end

def start
  if BOOST_DIR.nil? || BOOST_DIR.empty? || BOOST_DIR == "--help"
    puts "Usage:"
    puts "Remove the src/cxx_supportlib/vendor-modified/boost directory,"
    puts "then call: copy_boost_headers <boost source directory>"
    puts "then reapply patches to boost source files,"
    puts "they are kept in dev/boost-patches and can be applied by:"
    puts "patch -p1 < dev/boost-patches/000*-Patch-Name.patch"
    exit 1
  end
  begin
    prepare
    copy_essential_files
    [
      "-std=c++98",
      "-std=c++03",
      "-std=gnu++98",
      "-std=gnu++03",
      "-std=c++11",
      "-std=gnu++11",
      "-std=c++14",
      "-std=gnu++14",
      "-std=c++17",
      "-std=gnu++17",
      "-std=c++20",
      "-std=gnu++20",
      "-std=c++0x",
      "-std=gnu++0x",
      ""
    ].product(["-m32","-m64",""]).each do |flags|
      copy_dependencies(flags)
    end
  ensure
    cleanup
  end
end

start

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