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waf/waflib/Tools/python.py

548 lines
18 KiB
Python

#!/usr/bin/env python
# encoding: utf-8
# Thomas Nagy, 2007-2010 (ita)
# Gustavo Carneiro (gjc), 2007
"""
Support for Python, detect the headers and libraries and provide
*use* variables to link C/C++ programs against them::
def options(opt):
opt.load('compiler_c python')
def configure(conf):
conf.load('compiler_c python')
conf.check_python_version((2,4,2))
conf.check_python_headers()
def build(bld):
bld.program(features='pyembed', source='a.c', target='myprog')
bld.shlib(features='pyext', source='b.c', target='mylib')
"""
import os, sys
from waflib import Utils, Options, Errors, Logs, Task, Node
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;
}
'''
"""
Piece of C/C++ code used in :py:func:`waflib.Tools.python.check_python_headers`
"""
INST = '''
import sys, py_compile
py_compile.compile(sys.argv[1], sys.argv[2], sys.argv[3], True)
'''
"""
Piece of Python code used in :py:func:`waflib.Tools.python.pytask` for byte-compiling python files
"""
DISTUTILS_IMP = ['from distutils.sysconfig import get_config_var, get_python_lib']
@feature('py')
def feature_py(self):
"""
Create tasks to byte-compile .py files and install them, if requested
"""
install_path = getattr (self, 'install_path', '${PYTHONDIR}')
install_from = getattr (self, 'install_from', None)
if install_from and not isinstance (install_from, Node.Node):
install_from = self.path.find_dir (install_from)
inputs = []
for x in Utils.to_list (self.source):
if isinstance (x, Node.Node):
y = x
else:
y = self.path.find_resource (x)
inputs.append (y)
if install_path:
if install_from:
pyd = Utils.subst_vars ("%s/%s" % (install_path, y.path_from (install_from)), self.env)
else:
pyd = Utils.subst_vars ("%s/%s" % (install_path, y.path_from (self.path)), self.env)
else:
pyd = y.abspath ()
for ext in ["pyc", "pyo"]:
if install_from:
pyobj = self.path.get_bld ().make_node (y
.change_ext (".%s" % ext)
.get_bld ()
.path_from (install_from.get_bld ()))
else:
pyobj = self.path.get_bld ().make_node (y
.change_ext (".%s" % ext)
.name)
pyobj.parent.mkdir ()
tsk = self.create_task (ext, y, pyobj)
tsk.pyd = pyd
if install_path:
self.bld.install_files (install_path, pyobj, cwd = self.path.get_bld (), relative_trick = True)
if install_path:
if install_from:
self.bld.install_files (install_path, inputs, cwd = install_from, relative_trick = True)
else:
self.bld.install_files (install_path, inputs)
@extension('.py')
def process_py(self, node):
"""
Add signature of .py file, so it will be byte-compiled when necessary
"""
node.sig = Utils.h_file (node.abspath())
class pyc (Task.Task):
"""
Byte-compiling python files
"""
color = 'PINK'
def run(self):
cmd = [Utils.subst_vars('${PYTHON}', self.env), '-c', INST, self.inputs[0].abspath(), self.outputs[0].abspath(), self.pyd]
ret = self.generator.bld.exec_command(cmd)
return ret
class pyo (Task.Task):
"""
Byte-compiling python files
"""
color = 'PINK'
def run(self):
cmd = [Utils.subst_vars('${PYTHON}', self.env),
Utils.subst_vars('${PYFLAGS_OPT}', self.env), '-c', INST, self.inputs[0].abspath(), self.outputs[0].abspath(), self.pyd]
ret = self.generator.bld.exec_command(cmd)
return ret
@feature('pyext')
@before_method('propagate_uselib_vars', 'apply_link')
@after_method('apply_bundle')
def init_pyext(self):
"""
Change the values of *cshlib_PATTERN* and *cxxshlib_PATTERN* to remove the
*lib* prefix from library names.
"""
self.uselib = self.to_list(getattr(self, 'uselib', []))
if not 'PYEXT' in self.uselib:
self.uselib.append('PYEXT')
# override shlib_PATTERN set by the osx module
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):
"""
Add the PYEMBED variable.
"""
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):
"""
Spawn a new python process to dump configuration variables
:param variables: variables to print
:type variables: list of string
:param imports: one import by element
:type imports: list of string
:return: the variable values
:rtype: list of string
"""
if not imports:
try:
imports = self.python_imports
except AttributeError:
imports = DISTUTILS_IMP
program = list(imports) # copy
program.append('')
for v in variables:
program.append("print(repr(%s))" % v)
os_env = dict(os.environ)
try:
del os_env['MACOSX_DEPLOYMENT_TARGET'] # see comments in the OSX tool
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):
"""
Check for headers and libraries necessary to extend or embed python by using the module *distutils*.
On success the environment variables xxx_PYEXT and xxx_PYEMBED are added:
* PYEXT: for compiling python extensions
* PYEMBED: for embedding a python interpreter
"""
# FIXME rewrite
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'] # not a mistake
# Check for python libraries for embedding
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
#name = 'python' + env['PYTHON_VERSION']
# TODO simplify this
for name in ('python' + env['PYTHON_VERSION'], 'python' + env['PYTHON_VERSION'] + 'm', 'python' + env['PYTHON_VERSION'].replace('.', '')):
# LIBPATH_PYEMBED is already set; see if it works.
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 # do not forget to set LIBPATH_PYEMBED
if result:
env['LIBPATH_PYEMBED'] = path
env.append_value('LIB_PYEMBED', [name])
else:
conf.to_log("\n\n### LIB NOT FOUND\n")
# under certain conditions, python extensions must link to
# python libraries, not just python embedding programs.
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']
# We check that pythonX.Y-config exists, and if it exists we
# use it to get only the includes, else fall back to distutils.
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', msg="python-config", mandatory=False)
includes = []
if conf.env.PYTHON_CONFIG:
for incstr in conf.cmd_and_log(conf.env.PYTHON_CONFIG + ['--includes']).strip().split():
# strip the -I or /I
if (incstr.startswith('-I') or incstr.startswith('/I')):
incstr = incstr[2:]
# append include path, unless already given
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']]
# Code using the Python API needs to be compiled with -fno-strict-aliasing
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)
# See if it compiles
try:
conf.check(header_name='Python.h', define_name='HAVE_PYTHON_H',
uselib='PYEMBED', fragment=FRAG,
errmsg=':-(')
except conf.errors.ConfigurationError:
# python3.2, oh yeah
xx = conf.env.CXX_NAME and 'cxx' or 'c'
flags = ['--cflags', '--libs', '--ldflags']
for f in flags:
conf.check_cfg(msg='Asking python-config for pyembed %s flags' % f,
path=conf.env.PYTHON_CONFIG, package='', uselib_store='PYEMBED', args=[f])
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))
for f in flags:
conf.check_cfg(msg='Asking python-config for pyext %s flags' % f,
path=conf.env.PYTHON_CONFIG, package='', uselib_store='PYEXT', args=[f])
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):
"""
Check if the python interpreter is found matching a given minimum version.
minver should be a tuple, eg. to check for python >= 2.4.2 pass (2,4,2) as minver.
If successful, PYTHON_VERSION is defined as 'MAJOR.MINOR'
(eg. '2.4') of the actual python version found, and PYTHONDIR is
defined, pointing to the site-packages directory appropriate for
this python version, where modules/packages/extensions should be
installed.
:param minver: minimum version
:type minver: tuple of int
"""
assert minver is None or isinstance(minver, tuple)
pybin = conf.env['PYTHON']
if not pybin:
conf.fatal('could not find the python executable')
# Get python version string
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]))
# compare python version with the minimum required
result = (minver is None) or (pyver_tuple >= minver)
if result:
# define useful environment variables
pyver = '.'.join([str(x) for x in pyver_tuple[:2]])
conf.env['PYTHON_VERSION'] = pyver
if 'PYTHONDIR' in conf.env:
# Check if --pythondir was specified
pydir = conf.env['PYTHONDIR']
elif 'PYTHONDIR' in conf.environ:
# Check environment for PYTHONDIR
pydir = conf.environ['PYTHONDIR']
else:
# Finally, try to guess
if Utils.is_win32:
(python_LIBDEST, pydir) = conf.get_python_variables(
["get_config_var('LIBDEST') or ''",
"get_python_lib(standard_lib=0) or ''"])
else:
python_LIBDEST = None
(pydir,) = conf.get_python_variables( ["get_python_lib(standard_lib=0) or ''"])
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.env:
# Check if --pythonarchdir was specified
pyarchdir = conf.env['PYTHONARCHDIR']
elif 'PYTHONARCHDIR' in conf.environ:
# Check environment for PYTHONDIR
pyarchdir = conf.environ['PYTHONARCHDIR']
else:
# Finally, try to guess
(pyarchdir, ) = conf.get_python_variables( ["get_python_lib(plat_specific=1, standard_lib=0) or ''"])
if not pyarchdir:
pyarchdir = pydir
if hasattr(conf, 'define'): # conf.define is added by the C tool, so may not exist
conf.define('PYTHONDIR', pydir)
conf.define('PYTHONARCHDIR', pyarchdir)
conf.env['PYTHONDIR'] = pydir
conf.env['PYTHONARCHDIR'] = pyarchdir
# Feedback
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=''):
"""
Check if the selected python interpreter can import the given python module::
def configure(conf):
conf.check_python_module('pygccxml')
conf.check_python_module('re', condition="ver > num(2, 0, 4) and ver <= num(3, 0, 0)")
:param module_name: module
:type module_name: string
"""
msg = "Checking for 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):
"""
Detect the python interpreter
"""
v = conf.env
v['PYTHON'] = Options.options.python or os.environ.get('PYTHON', sys.executable)
if Options.options.pythondir:
v['PYTHONDIR'] = Options.options.pythondir
if Options.options.pythonarchdir:
v['PYTHONARCHDIR'] = Options.options.pythonarchdir
conf.find_program('python', var='PYTHON')
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):
"""
Add python-specific options
"""
pyopt=opt.add_option_group("Python Options")
pyopt.add_option('--nopyc', dest = 'pyc', action='store_false', default=1,
help = 'Do not install bytecode compiled .pyc files (configuration) [Default:install]')
pyopt.add_option('--nopyo', dest='pyo', action='store_false', default=1,
help='Do not install optimised compiled .pyo files (configuration) [Default:install]')
pyopt.add_option('--python', dest="python",
help='python binary to be used [Default: %s]' % sys.executable)
pyopt.add_option('--pythondir', dest='pythondir',
help='Installation path for python modules (py, platform-independent .py and .pyc files)')
pyopt.add_option('--pythonarchdir', dest='pythonarchdir',
help='Installation path for python extension (pyext, platform-dependent .so or .dylib files)')