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

import os,sys
from waflib import Utils,Options,Errors,Logs
from waflib.TaskGen import extension,before_method,after_method,feature
from waflib.Configure import conf
FRAG='''
#include <Python.h>
#ifdef __cplusplus
extern "C" {
#endif
	void Py_Initialize(void);
	void Py_Finalize(void);
#ifdef __cplusplus
}
#endif
int main(int argc, char **argv)
{
   (void)argc; (void)argv;
   Py_Initialize();
   Py_Finalize();
   return 0;
}
'''
INST='''
import sys, py_compile
py_compile.compile(sys.argv[1], sys.argv[2], sys.argv[3])
'''
DISTUTILS_IMP=['from distutils.sysconfig import get_config_var, get_python_lib']
@extension('.py')
def process_py(self,node):
	try:
		if not self.bld.is_install:
			return
	except AttributeError:
		return
	try:
		if not self.install_path:
			return
	except AttributeError:
		self.install_path='${PYTHONDIR}'
	def inst_py(ctx):
		install_from=getattr(self,'install_from',None)
		if install_from:
			install_from=self.path.find_dir(install_from)
		install_pyfile(self,node,install_from)
	self.bld.add_post_fun(inst_py)
def install_pyfile(self,node,install_from=None):
	from_node=install_from or node.parent
	tsk=self.bld.install_as(self.install_path+'/'+node.path_from(from_node),node,postpone=False)
	path=tsk.get_install_path()
	if self.bld.is_install<0:
		Logs.info("+ removing byte compiled python files")
		for x in'co':
			try:
				os.remove(path+x)
			except OSError:
				pass
	if self.bld.is_install>0:
		try:
			st1=os.stat(path)
		except OSError:
			Logs.error('The python file is missing, this should not happen')
		for x in['c','o']:
			do_inst=self.env['PY'+x.upper()]
			try:
				st2=os.stat(path+x)
			except OSError:
				pass
			else:
				if st1.st_mtime<=st2.st_mtime:
					do_inst=False
			if do_inst:
				lst=(x=='o')and[self.env['PYFLAGS_OPT']]or[]
				(a,b,c)=(path,path+x,tsk.get_install_path(destdir=False)+x)
				argv=self.env['PYTHON']+lst+['-c',INST,a,b,c]
				Logs.info('+ byte compiling %r'%(path+x))
				env=self.env.env or None
				ret=Utils.subprocess.Popen(argv,env=env).wait()
				if ret:
					raise Errors.WafError('py%s compilation failed %r'%(x,path))
@feature('py')
def feature_py(self):
	pass
@feature('pyext')
@before_method('propagate_uselib_vars','apply_link')
@after_method('apply_bundle')
def init_pyext(self):
	self.uselib=self.to_list(getattr(self,'uselib',[]))
	if not'PYEXT'in self.uselib:
		self.uselib.append('PYEXT')
	self.env.cshlib_PATTERN=self.env.cxxshlib_PATTERN=self.env.macbundle_PATTERN=self.env.pyext_PATTERN
	self.env.fcshlib_PATTERN=self.env.dshlib_PATTERN=self.env.pyext_PATTERN
	try:
		if not self.install_path:
			return
	except AttributeError:
		self.install_path='${PYTHONARCHDIR}'
@feature('pyext')
@before_method('apply_link','apply_bundle')
def set_bundle(self):
	if Utils.unversioned_sys_platform()=='darwin':
		self.mac_bundle=True
@before_method('propagate_uselib_vars')
@feature('pyembed')
def init_pyembed(self):
	self.uselib=self.to_list(getattr(self,'uselib',[]))
	if not'PYEMBED'in self.uselib:
		self.uselib.append('PYEMBED')
@conf
def get_python_variables(self,variables,imports=None):
	if not imports:
		try:
			imports=self.python_imports
		except AttributeError:
			imports=DISTUTILS_IMP
	program=list(imports)
	program.append('')
	for v in variables:
		program.append("print(repr(%s))"%v)
	os_env=dict(os.environ)
	try:
		del os_env['MACOSX_DEPLOYMENT_TARGET']
	except KeyError:
		pass
	try:
		out=self.cmd_and_log(self.env.PYTHON+['-c','\n'.join(program)],env=os_env)
	except Errors.WafError:
		self.fatal('The distutils module is unusable: install "python-devel"?')
	self.to_log(out)
	return_values=[]
	for s in out.split('\n'):
		s=s.strip()
		if not s:
			continue
		if s=='None':
			return_values.append(None)
		elif(s[0]=="'"and s[-1]=="'")or(s[0]=='"'and s[-1]=='"'):
			return_values.append(eval(s))
		elif s[0].isdigit():
			return_values.append(int(s))
		else:break
	return return_values
@conf
def check_python_headers(conf):
	env=conf.env
	if not env['CC_NAME']and not env['CXX_NAME']:
		conf.fatal('load a compiler first (gcc, g++, ..)')
	if not env['PYTHON_VERSION']:
		conf.check_python_version()
	pybin=conf.env.PYTHON
	if not pybin:
		conf.fatal('Could not find the python executable')
	v='prefix SO LDFLAGS LIBDIR LIBPL INCLUDEPY Py_ENABLE_SHARED MACOSX_DEPLOYMENT_TARGET LDSHARED CFLAGS'.split()
	try:
		lst=conf.get_python_variables(["get_config_var('%s') or ''"%x for x in v])
	except RuntimeError:
		conf.fatal("Python development headers not found (-v for details).")
	vals=['%s = %r'%(x,y)for(x,y)in zip(v,lst)]
	conf.to_log("Configuration returned from %r:\n%r\n"%(pybin,'\n'.join(vals)))
	dct=dict(zip(v,lst))
	x='MACOSX_DEPLOYMENT_TARGET'
	if dct[x]:
		conf.env[x]=conf.environ[x]=dct[x]
	env['pyext_PATTERN']='%s'+dct['SO']
	all_flags=dct['LDFLAGS']+' '+dct['CFLAGS']
	conf.parse_flags(all_flags,'PYEMBED')
	all_flags=dct['LDFLAGS']+' '+dct['LDSHARED']+' '+dct['CFLAGS']
	conf.parse_flags(all_flags,'PYEXT')
	result=None
	for name in('python'+env['PYTHON_VERSION'],'python'+env['PYTHON_VERSION'].replace('.','')):
		if not result and env['LIBPATH_PYEMBED']:
			path=env['LIBPATH_PYEMBED']
			conf.to_log("\n\n# Trying default LIBPATH_PYEMBED: %r\n"%path)
			result=conf.check(lib=name,uselib='PYEMBED',libpath=path,mandatory=False,msg='Checking for library %s in LIBPATH_PYEMBED'%name)
		if not result and dct['LIBDIR']:
			path=[dct['LIBDIR']]
			conf.to_log("\n\n# try again with -L$python_LIBDIR: %r\n"%path)
			result=conf.check(lib=name,uselib='PYEMBED',libpath=path,mandatory=False,msg='Checking for library %s in LIBDIR'%name)
		if not result and dct['LIBPL']:
			path=[dct['LIBPL']]
			conf.to_log("\n\n# try again with -L$python_LIBPL (some systems don't install the python library in $prefix/lib)\n")
			result=conf.check(lib=name,uselib='PYEMBED',libpath=path,mandatory=False,msg='Checking for library %s in python_LIBPL'%name)
		if not result:
			path=[os.path.join(dct['prefix'],"libs")]
			conf.to_log("\n\n# try again with -L$prefix/libs, and pythonXY name rather than pythonX.Y (win32)\n")
			result=conf.check(lib=name,uselib='PYEMBED',libpath=path,mandatory=False,msg='Checking for library %s in $prefix/libs'%name)
		if result:
			break
	if result:
		env['LIBPATH_PYEMBED']=path
		env.append_value('LIB_PYEMBED',[name])
	else:
		conf.to_log("\n\n### LIB NOT FOUND\n")
	if(Utils.is_win32 or sys.platform.startswith('os2')or dct['Py_ENABLE_SHARED']):
		env['LIBPATH_PYEXT']=env['LIBPATH_PYEMBED']
		env['LIB_PYEXT']=env['LIB_PYEMBED']
	num='.'.join(env['PYTHON_VERSION'].split('.')[:2])
	conf.find_program([''.join(pybin)+'-config','python%s-config'%num,'python-config-%s'%num,'python%sm-config'%num],var='PYTHON_CONFIG',mandatory=False)
	includes=[]
	if conf.env.PYTHON_CONFIG:
		for incstr in conf.cmd_and_log([conf.env.PYTHON_CONFIG,'--includes']).strip().split():
			if(incstr.startswith('-I')or incstr.startswith('/I')):
				incstr=incstr[2:]
			if incstr not in includes:
				includes.append(incstr)
		conf.to_log("Include path for Python extensions (found via python-config --includes): %r\n"%(includes,))
		env['INCLUDES_PYEXT']=includes
		env['INCLUDES_PYEMBED']=includes
	else:
		conf.to_log("Include path for Python extensions ""(found via distutils module): %r\n"%(dct['INCLUDEPY'],))
		env['INCLUDES_PYEXT']=[dct['INCLUDEPY']]
		env['INCLUDES_PYEMBED']=[dct['INCLUDEPY']]
	if env['CC_NAME']=='gcc':
		env.append_value('CFLAGS_PYEMBED',['-fno-strict-aliasing'])
		env.append_value('CFLAGS_PYEXT',['-fno-strict-aliasing'])
	if env['CXX_NAME']=='gcc':
		env.append_value('CXXFLAGS_PYEMBED',['-fno-strict-aliasing'])
		env.append_value('CXXFLAGS_PYEXT',['-fno-strict-aliasing'])
	if env.CC_NAME=="msvc":
		from distutils.msvccompiler import MSVCCompiler
		dist_compiler=MSVCCompiler()
		dist_compiler.initialize()
		env.append_value('CFLAGS_PYEXT',dist_compiler.compile_options)
		env.append_value('CXXFLAGS_PYEXT',dist_compiler.compile_options)
		env.append_value('LINKFLAGS_PYEXT',dist_compiler.ldflags_shared)
	try:
		conf.check(header_name='Python.h',define_name='HAVE_PYTHON_H',uselib='PYEMBED',fragment=FRAG,errmsg=':-(')
	except conf.errors.ConfigurationError:
		xx=conf.env.CXX_NAME and'cxx'or'c'
		conf.check_cfg(msg='Asking python-config for the flags (pyembed)',path=conf.env.PYTHON_CONFIG,package='',uselib_store='PYEMBED',args=['--cflags','--libs','--ldflags'])
		conf.check(header_name='Python.h',define_name='HAVE_PYTHON_H',msg='Getting pyembed flags from python-config',fragment=FRAG,errmsg='Could not build a python embedded interpreter',features='%s %sprogram pyembed'%(xx,xx))
		conf.check_cfg(msg='Asking python-config for the flags (pyext)',path=conf.env.PYTHON_CONFIG,package='',uselib_store='PYEXT',args=['--cflags','--libs','--ldflags'])
		conf.check(header_name='Python.h',define_name='HAVE_PYTHON_H',msg='Getting pyext flags from python-config',features='%s %sshlib pyext'%(xx,xx),fragment=FRAG,errmsg='Could not build python extensions')
@conf
def check_python_version(conf,minver=None):
	assert minver is None or isinstance(minver,tuple)
	pybin=conf.env['PYTHON']
	if not pybin:
		conf.fatal('could not find the python executable')
	cmd=pybin+['-c','import sys\nfor x in sys.version_info: print(str(x))']
	Logs.debug('python: Running python command %r'%cmd)
	lines=conf.cmd_and_log(cmd).split()
	assert len(lines)==5,"found %i lines, expected 5: %r"%(len(lines),lines)
	pyver_tuple=(int(lines[0]),int(lines[1]),int(lines[2]),lines[3],int(lines[4]))
	result=(minver is None)or(pyver_tuple>=minver)
	if result:
		pyver='.'.join([str(x)for x in pyver_tuple[:2]])
		conf.env['PYTHON_VERSION']=pyver
		if'PYTHONDIR'in conf.environ:
			pydir=conf.environ['PYTHONDIR']
		else:
			if Utils.is_win32:
				(python_LIBDEST,pydir)=conf.get_python_variables(["get_config_var('LIBDEST') or ''","get_python_lib(standard_lib=0, prefix=%r) or ''"%conf.env['PREFIX']])
			else:
				python_LIBDEST=None
				(pydir,)=conf.get_python_variables(["get_python_lib(standard_lib=0, prefix=%r) or ''"%conf.env['PREFIX']])
			if python_LIBDEST is None:
				if conf.env['LIBDIR']:
					python_LIBDEST=os.path.join(conf.env['LIBDIR'],"python"+pyver)
				else:
					python_LIBDEST=os.path.join(conf.env['PREFIX'],"lib","python"+pyver)
		if'PYTHONARCHDIR'in conf.environ:
			pyarchdir=conf.environ['PYTHONARCHDIR']
		else:
			(pyarchdir,)=conf.get_python_variables(["get_python_lib(plat_specific=1, standard_lib=0, prefix=%r) or ''"%conf.env['PREFIX']])
			if not pyarchdir:
				pyarchdir=pydir
		if hasattr(conf,'define'):
			conf.define('PYTHONDIR',pydir)
			conf.define('PYTHONARCHDIR',pyarchdir)
		conf.env['PYTHONDIR']=pydir
		conf.env['PYTHONARCHDIR']=pyarchdir
	pyver_full='.'.join(map(str,pyver_tuple[:3]))
	if minver is None:
		conf.msg('Checking for python version',pyver_full)
	else:
		minver_str='.'.join(map(str,minver))
		conf.msg('Checking for python version',pyver_tuple,">= %s"%(minver_str,)and'GREEN'or'YELLOW')
	if not result:
		conf.fatal('The python version is too old, expecting %r'%(minver,))
PYTHON_MODULE_TEMPLATE='''
import %s as current_module
version = getattr(current_module, '__version__', None)
if version is not None:
    print(str(version))
else:
    print('unknown version')
'''
@conf
def check_python_module(conf,module_name,condition=''):
	msg='Python module %s'%module_name
	if condition:
		msg='%s (%s)'%(msg,condition)
	conf.start_msg(msg)
	try:
		ret=conf.cmd_and_log(conf.env['PYTHON']+['-c',PYTHON_MODULE_TEMPLATE%module_name])
	except Exception:
		conf.end_msg(False)
		conf.fatal('Could not find the python module %r'%module_name)
	ret=ret.strip()
	if condition:
		conf.end_msg(ret)
		if ret=='unknown version':
			conf.fatal('Could not check the %s version'%module_name)
		from distutils.version import LooseVersion
		def num(*k):
			if isinstance(k[0],int):
				return LooseVersion('.'.join([str(x)for x in k]))
			else:
				return LooseVersion(k[0])
		d={'num':num,'ver':LooseVersion(ret)}
		ev=eval(condition,{},d)
		if not ev:
			conf.fatal('The %s version does not satisfy the requirements'%module_name)
	else:
		if ret=='unknown version':
			conf.end_msg(True)
		else:
			conf.end_msg(ret)
def configure(conf):
	try:
		conf.find_program('python',var='PYTHON')
	except conf.errors.ConfigurationError:
		Logs.warn("could not find a python executable, setting to sys.executable '%s'"%sys.executable)
		conf.env.PYTHON=sys.executable
	if conf.env.PYTHON!=sys.executable:
		Logs.warn("python executable %r differs from system %r"%(conf.env.PYTHON,sys.executable))
	conf.env.PYTHON=conf.cmd_to_list(conf.env.PYTHON)
	v=conf.env
	v['PYCMD']='"import sys, py_compile;py_compile.compile(sys.argv[1], sys.argv[2])"'
	v['PYFLAGS']=''
	v['PYFLAGS_OPT']='-O'
	v['PYC']=getattr(Options.options,'pyc',1)
	v['PYO']=getattr(Options.options,'pyo',1)
def options(opt):
	opt.add_option('--nopyc',action='store_false',default=1,help='Do not install bytecode compiled .pyc files (configuration) [Default:install]',dest='pyc')
	opt.add_option('--nopyo',action='store_false',default=1,help='Do not install optimised compiled .pyo files (configuration) [Default:install]',dest='pyo')
