#! /usr/bin/env python
# encoding: utf-8
# WARNING! Do not edit! http://waf.googlecode.com/git/docs/wafbook/single.html#_obtaining_the_waf_file

'''

This is an extra tool, not bundled with the default waf binary.
To add the boost tool to the waf file:
$ ./waf-light --tools=compat15,boost
	or, if you have waf >= 1.6.2
$ ./waf update --files=boost

When using this tool, the wscript will look like:

	def options(opt):
		opt.load('compiler_cxx boost')

	def configure(conf):
		conf.load('compiler_cxx boost')
		conf.check_boost(lib='system filesystem')

	def build(bld):
		bld(source='main.cpp', target='app', use='BOOST')

Options are generated, in order to specify the location of boost includes/libraries.
The `check_boost` configuration function allows to specify the used boost libraries.
It can also provide default arguments to the --boost-static and --boost-mt command-line arguments.
Everything will be packaged together in a BOOST component that you can use.

When using MSVC, a lot of compilation flags need to match your BOOST build configuration:
 - you may have to add /EHsc to your CXXFLAGS or define boost::throw_exception if BOOST_NO_EXCEPTIONS is defined.
   Errors: C4530
 - boost libraries will try to be smart and use the (pretty but often not useful) auto-linking feature of MSVC
   So before calling `conf.check_boost` you might want to disabling by adding:
   	conf.env.DEFINES_BOOST += ['BOOST_ALL_NO_LIB']
   Errors: 
 - boost might also be compiled with /MT, which links the runtime statically.
   If you have problems with redefined symbols, 
		self.env['DEFINES_%s' % var] += ['BOOST_ALL_NO_LIB']
		self.env['CXXFLAGS_%s' % var] += ['/MD', '/EHsc']
Passing `--boost-linkage_autodetect` might help ensuring having a correct linkage in some basic cases.

'''
import sys
import re
from waflib import Utils,Logs,Errors
from waflib.Configure import conf
BOOST_LIBS=['/usr/lib','/usr/local/lib','/opt/local/lib','/sw/lib','/lib']
BOOST_INCLUDES=['/usr/include','/usr/local/include','/opt/local/include','/sw/include']
BOOST_VERSION_FILE='boost/version.hpp'
BOOST_VERSION_CODE='''
#include <iostream>
#include <boost/version.hpp>
int main() { std::cout << BOOST_LIB_VERSION << std::endl; }
'''
PLATFORM=Utils.unversioned_sys_platform()
detect_intel=lambda env:(PLATFORM=='win32')and'iw'or'il'
detect_clang=lambda env:(PLATFORM=='darwin')and'clang-darwin'or'clang'
detect_mingw=lambda env:(re.search('MinGW',env.CXX[0]))and'mgw'or'gcc'
BOOST_TOOLSETS={'borland':'bcb','clang':detect_clang,'como':'como','cw':'cw','darwin':'xgcc','edg':'edg','g++':detect_mingw,'gcc':detect_mingw,'icpc':detect_intel,'intel':detect_intel,'kcc':'kcc','kylix':'bck','mipspro':'mp','mingw':'mgw','msvc':'vc','qcc':'qcc','sun':'sw','sunc++':'sw','tru64cxx':'tru','vacpp':'xlc'}
def options(opt):
	opt.add_option('--boost-includes',type='string',default='',dest='boost_includes',help='''path to the boost includes root (~boost root)
				   e.g. /path/to/boost_1_47_0''')
	opt.add_option('--boost-libs',type='string',default='',dest='boost_libs',help='''path to the directory where the boost libs are
				   e.g. /path/to/boost_1_47_0/stage/lib''')
	opt.add_option('--boost-static',action='store_true',default=False,dest='boost_static',help='link with static boost libraries (.lib/.a)')
	opt.add_option('--boost-mt',action='store_true',default=False,dest='boost_mt',help='select multi-threaded libraries')
	opt.add_option('--boost-abi',type='string',default='',dest='boost_abi',help='''select libraries with tags (dgsyp, d for debug),
				   see doc Boost, Getting Started, chapter 6.1''')
	opt.add_option('--boost-linkage_autodetect',action="store_true",dest='boost_linkage_autodetect',help="auto-detect boost linkage options (don't get used to it / might break other stuff)")
	opt.add_option('--boost-toolset',type='string',default='',dest='boost_toolset',help='force a toolset e.g. msvc, vc90, \
						gcc, mingw, mgw45 (default: auto)')
	py_version='%d%d'%(sys.version_info[0],sys.version_info[1])
	opt.add_option('--boost-python',type='string',default=py_version,dest='boost_python',help='select the lib python with this version \
						(default: %s)'%py_version)
@conf
def __boost_get_version_file(self,dir):
	try:
		return self.root.find_dir(dir).find_node(BOOST_VERSION_FILE)
	except:
		return None
@conf
def boost_get_version(self,dir):
	re_but=re.compile('^#define\\s+BOOST_LIB_VERSION\\s+"(.*)"$',re.M)
	try:
		val=re_but.search(self.__boost_get_version_file(dir).read()).group(1)
	except:
		val=self.check_cxx(fragment=BOOST_VERSION_CODE,includes=[dir],execute=False,define_ret=True)
	return val
@conf
def boost_get_includes(self,*k,**kw):
	includes=k and k[0]or kw.get('includes',None)
	if includes and self.__boost_get_version_file(includes):
		return includes
	for dir in BOOST_INCLUDES:
		if self.__boost_get_version_file(dir):
			return dir
	if includes:
		self.fatal('headers not found in %s'%includes)
	else:
		self.fatal('headers not found, please provide a --boost-includes argument (see help)')
@conf
def boost_get_toolset(self,cc):
	toolset=cc
	if not cc:
		build_platform=Utils.unversioned_sys_platform()
		if build_platform in BOOST_TOOLSETS:
			cc=build_platform
		else:
			cc=self.env.CXX_NAME
	if cc in BOOST_TOOLSETS:
		toolset=BOOST_TOOLSETS[cc]
	return isinstance(toolset,str)and toolset or toolset(self.env)
@conf
def __boost_get_libs_path(self,*k,**kw):
	''' return the lib path and all the files in it '''
	if'files'in kw:
		return self.root.find_dir('.'),Utils.to_list(kw['files'])
	libs=k and k[0]or kw.get('libs',None)
	if libs:
		path=self.root.find_dir(libs)
		files=path.ant_glob('*boost_*')
	if not libs or not files:
		for dir in BOOST_LIBS:
			try:
				path=self.root.find_dir(dir)
				files=path.ant_glob('*boost_*')
				if files:
					break
				path=self.root.find_dir(dir+'64')
				files=path.ant_glob('*boost_*')
				if files:
					break
			except:
				path=None
	if not path:
		if libs:
			self.fatal('libs not found in %s'%libs)
		else:
			self.fatal('libs not found, please provide a --boost-libs argument (see help)')
	self.to_log('Found the boost path in %r with the libraries:'%path)
	for x in files:
		self.to_log('    %r'%x)
	return path,files
@conf
def boost_get_libs(self,*k,**kw):
	'''
	return the lib path and the required libs
	according to the parameters
	'''
	path,files=self.__boost_get_libs_path(**kw)
	t=[]
	if kw.get('mt',False):
		t.append('mt')
	if kw.get('abi',None):
		t.append(kw['abi'])
	tags=t and'(-%s)+'%'-'.join(t)or''
	toolset=self.boost_get_toolset(kw.get('toolset',''))
	toolset_pat='(-%s[0-9]{0,3})+'%toolset
	version='(-%s)+'%self.env.BOOST_VERSION
	def find_lib(re_lib,files):
		for file in files:
			if re_lib.search(file.name):
				self.to_log('Found boost lib %s'%file)
				return file
		return None
	def format_lib_name(name):
		if name.startswith('lib')and self.env.CC_NAME!='msvc':
			name=name[3:]
		return name[:name.rfind('.')]
	libs=[]
	for lib in Utils.to_list(k and k[0]or kw.get('lib',None)):
		py=(lib=='python')and'(-py%s)+'%kw['python']or''
		for pattern in['boost_%s%s%s%s%s'%(lib,toolset_pat,tags,py,version),'boost_%s%s%s%s'%(lib,tags,py,version),'boost_%s%s%s'%(lib,tags,version),'boost_%s%s%s%s'%(lib,toolset_pat,tags,py),'boost_%s%s%s'%(lib,tags,py),'boost_%s%s'%(lib,tags)]:
			self.to_log('Trying pattern %s'%pattern)
			file=find_lib(re.compile(pattern),files)
			if file:
				libs.append(format_lib_name(file.name))
				break
		else:
			self.fatal('lib %s not found in %s'%(lib,path.abspath()))
	return path.abspath(),libs
@conf
def check_boost(self,*k,**kw):
	if not self.env['CXX']:
		self.fatal('load a c++ compiler first, conf.load("compiler_cxx")')
	params={'lib':k and k[0]or kw.get('lib',None)}
	for key,value in self.options.__dict__.items():
		if not key.startswith('boost_'):
			continue
		key=key[len('boost_'):]
		params[key]=value and value or kw.get(key,'')
	var=kw.get('uselib_store','BOOST')
	self.start_msg('Checking boost includes')
	self.env['INCLUDES_%s'%var]=inc=self.boost_get_includes(**params)
	self.env.BOOST_VERSION=self.boost_get_version(inc)
	self.end_msg(self.env.BOOST_VERSION)
	if Logs.verbose:
		Logs.pprint('CYAN','	path : %s'%self.env['INCLUDES_%s'%var])
	if not params['lib']:
		return
	self.start_msg('Checking boost libs')
	suffix=params.get('static',None)and'ST'or''
	path,libs=self.boost_get_libs(**params)
	self.env['%sLIBPATH_%s'%(suffix,var)]=[path]
	self.env['%sLIB_%s'%(suffix,var)]=libs
	self.end_msg('ok')
	if Logs.verbose:
		Logs.pprint('CYAN','	path : %s'%path)
		Logs.pprint('CYAN','	libs : %s'%libs)
	def try_link():
		if'system'in params['lib']:
			self.check_cxx(fragment="\n".join(['#include <boost/system/error_code.hpp>','int main() { boost::system::error_code c; }',]),use=var,execute=False,)
		if'thread'in params['lib']:
			self.check_cxx(fragment="\n".join(['#include <boost/thread.hpp>','int main() { boost::thread t; }',]),use=var,execute=False,)
	if params.get('linkage_autodetect',False):
		self.start_msg("Attempting to detect boost linkage flags")
		toolset=self.boost_get_toolset(kw.get('toolset',''))
		if toolset in['vc']:
			self.env['DEFINES_%s'%var]+=['BOOST_ALL_NO_LIB']
			has_dlls=False
			for x in Utils.listdir(path):
				if x.endswith(self.env.cxxshlib_PATTERN%''):
					has_dlls=True
					break
			if not has_dlls:
				self.env['STLIBPATH_%s'%var]=[path]
				self.env['STLIB_%s'%var]=libs
				del self.env['LIB_%s'%var]
				del self.env['LIBPATH_%s'%var]
			for cxxflags in(['/MD','/EHsc'],[]):
				self.env.stash()
				self.env["CXXFLAGS_%s"%var]+=cxxflags
				try:
					try_link()
					self.end_msg("ok: winning cxxflags combination: %s"%(self.env["CXXFLAGS_%s"%var]))
					e=None
					break
				except Errors.ConfigurationError as exc:
					self.env.revert()
					e=exc
			if e is not None:
				self.fatal("Could not auto-detect boost linking flags combination, you may report it to boost.py author",ex=e)
		else:
			self.fatal("Boost linkage flags auto-detection not implemented (needed ?) for this toolchain")
	else:
		self.start_msg('Checking for boost linkage')
		try:
			try_link()
		except Errors.ConfigurationError ,e:
			self.fatal("Could not link against boost libraries using supplied options")
		self.end_msg('ok')
