import python ;
import feature ;
import feature : feature ;
import project ;
import targets ;
import "class" : new ;
import modules ;

use-project /torrent : ../.. ;

BOOST_ROOT = [ modules.peek : BOOST_ROOT ] ;
# this is used to make bjam use the same version of python which is executing setup.py
LIBTORRENT_PYTHON_INTERPRETER = [ modules.peek : LIBTORRENT_PYTHON_INTERPRETER ] ;

feature visibility : default hidden : composite propagated ;
feature.compose <visibility>hidden : <cflags>-fvisibility=hidden <cxxflags>-fvisibility-inlines-hidden ;

feature libtorrent-link : shared static : composite propagated ;
feature libtorrent-python-pic : off on : composite propagated link-incompatible ;
feature.compose <libtorrent-python-pic>on : <cflags>-fPIC ;

# this is just to force boost build to pick the desired python target when using LIBTORRENT_PYTHON_INTERPRETER
feature libtorrent-python : on ;

if $(LIBTORRENT_PYTHON_INTERPRETER)
{
	echo "using python interpreter at: " $(LIBTORRENT_PYTHON_INTERPRETER) ;
	using python : : "$(LIBTORRENT_PYTHON_INTERPRETER)" : : : <libtorrent-python>on ;
}

# copied from boost 1.63's boost python jamfile
rule find-py3-version
{
    local versions = [ feature.values python ] ;
    local py3ver ;
    for local v in $(versions)
    {
        if $(v) >= 3.0
        {
            py3ver = $(v) ;
        }
    }
    return $(py3ver) ;
}

if $(BOOST_ROOT)
{
	use-project /boost : $(BOOST_ROOT) ;
	alias boost_python : /boost/python//boost_python : : : <include>$(BOOST_ROOT) ;
	if [ find-py3-version ]
	{
		alias boost_python3 : /boost/python//boost_python3 : : : <include>$(BOOST_ROOT) ;
	}
	else
	{
		alias boost_python3 ;
	}
}
else
{
	local boost-lib-search-path =
		<search>/opt/local/lib
		<search>/usr/lib
		<search>/usr/local/lib
		<search>/sw/lib
		<search>/usr/g++/lib
		;

	local boost-include-path =
		<include>/opt/local/include
		<include>/usr/local/include
		<include>/usr/sfw/include
	;

	# the names are decorated in MacPorts
	lib boost_python : : <target-os>darwin <name>boost_python27-mt
		: : $(boost-include-path) ;
	lib boost_python3 : : <target-os>darwin <name>boost_python3-mt
		: : $(boost-include-path) ;

	lib boost_python : : <name>boost_python
		: : $(boost-include-path) ;
	lib boost_python3 : : <name>boost_python3
		: : $(boost-include-path) ;
}


rule libtorrent_linking ( properties * )
{
    local result ;

    if ! <target-os>windows in $(properties)
        && <toolset>gcc in $(properties)
        && <libtorrent-link>static in $(properties)
    {
        result += <libtorrent-python-pic>on ;
    }

    if <toolset>gcc in $(properties)
      || <toolset>darwin in $(properties)
      || <toolset>clang in $(properties)
      || <toolset>clang-darwin in $(properties)
    {
        result += <visibility>hidden ;

        if ( <toolset>gcc in $(properties) )
        {
           result += <linkflags>-Wl,-Bsymbolic ;
        }
    }

    if <link>static in $(properties)
    {
        ECHO "WARNING: you probably want to specify libtorrent-link=static rather than link=static" ;
    }

    if <boost-link>static in $(properties) && <target-os>linux in $(properties)
    {
        ECHO "WARNING: you cannot link statically against boost-python on linux, because it links against pthread statically in that case, which is not allowed" ;
    }

	local boost_python_lib ;

	for local prop in $(properties)
	{
		switch $(prop)
		{
			case <python>2.* : boost_python_lib = boost_python ;
			case <python>3.* : boost_python_lib = boost_python3 ;
		}
	}

	if ! $(boost_python_lib)
	{
		ECHO "WARNING: unknown python version" ;
		boost_python_lib = boost_python ;
	}

    # linux must link dynamically against boost python because it pulls
    # in libpthread, which must be linked dynamically since we're building a .so
    # (the static build of libpthread is not position independent)
    if <boost-link>shared in $(properties) || <target-os>linux in $(properties)
    {
        result += <library>$(boost_python_lib)/<link>shared/<warnings>off ;
    }
    else
    {
        result += <library>$(boost_python_lib)/<link>static/<warnings>off ;
    }

    if <libtorrent-link>shared in $(properties)
    {
        result += <library>/torrent//torrent/<link>shared ;
    }
    else
    {
        result += <library>/torrent//torrent/<link>static ;
    }

    return $(result) ;
}

# this is a copy of the rule from boost-build's python-extension, but without
# specifying <suppress-import-lib>no as a mandatory property. That property
# would otherwise cause build failures because it suppresses linking against the
# runtime library and kernel32 on windows

rule my-python-extension ( name : sources * : requirements * : default-build * :
                        usage-requirements * )
{
    requirements += <use>/python//python_for_extensions ;

    local project = [ project.current ] ;

    targets.main-target-alternative
        [ new typed-target $(name) : $(project) : PYTHON_EXTENSION
            : [ targets.main-target-sources $(sources) : $(name) ]
            : [ targets.main-target-requirements $(requirements) : $(project) ]
            : [ targets.main-target-default-build $(default-build) : $(project) ]
        ] ;
}

my-python-extension libtorrent
  : # sources
    src/module.cpp
    src/sha1_hash.cpp
    src/converters.cpp
    src/create_torrent.cpp
    src/fingerprint.cpp
    src/utility.cpp
    src/session.cpp
    src/entry.cpp
    src/torrent_info.cpp
    src/string.cpp
    src/torrent_handle.cpp
    src/torrent_status.cpp
    src/session_settings.cpp
    src/version.cpp
    src/alert.cpp
    src/datetime.cpp
    src/peer_info.cpp
    src/ip_filter.cpp
    src/magnet_uri.cpp
    src/error_code.cpp
  : # requirements
    <include>src
    <toolset>gcc:<cxxflags>-Wno-deprecated-declarations
    <toolset>darwin:<cxxflags>-Wno-deprecated-declarations
    <toolset>darwin:<cxxflags>-Wno-unused-command-line-argument
    <conditional>@libtorrent_linking
    <crypto>openssl:<library>/torrent//ssl
    <crypto>openssl:<library>/torrent//crypto
  : # default-build
    <warnings>all
  : # usage-requirements
    <suppress-import-lib>false
  ;

install stage_module
  : libtorrent
  : <location>.
    <install-type>PYTHON_EXTENSION
  ;

install stage_dependencies
  : /torrent//torrent
    boost_python
    boost_python3
  : <location>dependencies
    <install-dependencies>on
    <install-type>SHARED_LIB
  ;

explicit stage_module ;
explicit stage_dependencies ;