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pyzmq/buildutils.py

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"""Detect zmq version"""
#
# Copyright (c) 2011 Min Ragan-Kelley
#
# This file is part of pyzmq, copied and adapted from h5py.
# h5py source used under the New BSD license
#
# h5py: <http://code.google.com/p/h5py/>
# BSD license: <http://www.opensource.org/licenses/bsd-license.php>
#
# pyzmq is free software; you can redistribute it and/or modify it under
# the terms of the Lesser GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# pyzmq is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# Lesser GNU General Public License for more details.
#
# You should have received a copy of the Lesser GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import shutil
import sys
import os
import logging
import pickle
import platform
from distutils import ccompiler
from distutils.sysconfig import customize_compiler
from subprocess import Popen, PIPE
try:
from configparser import ConfigParser
except:
from ConfigParser import ConfigParser
pjoin = os.path.join
#-----------------------------------------------------------------------------
# Logging (adapted from h5py: http://h5py.googlecode.com)
#-----------------------------------------------------------------------------
logger = logging.getLogger()
logger.addHandler(logging.StreamHandler(sys.stderr))
def debug(what):
pass
def fatal(instring, code=1):
logger.error("Fatal: "+instring)
exit(code)
def warn(instring):
logger.error("Warning: "+instring)
#-----------------------------------------------------------------------------
# Utility functions (adapted from h5py: http://h5py.googlecode.com)
#-----------------------------------------------------------------------------
def detect_zmq(basedir, **compiler_attrs):
"""Compile, link & execute a test program, in empty directory `basedir`.
The C compiler will be updated with any keywords given via setattr.
Parameters
----------
basedir : path
The location where the test program will be compiled and run
**compiler_attrs : dict
Any extra compiler attributes, which will be set via ``setattr(cc)``.
Returns
-------
A dict of properties for zmq compilation, with the following two keys:
vers : tuple
The ZMQ version as a tuple of ints, e.g. (2,2,0)
options : dict
The compiler options used to compile the test function, e.g. `include_dirs`,
`library_dirs`, `libs`, etc.
"""
cc = ccompiler.new_compiler()
customize_compiler(cc)
for name, val in compiler_attrs.items():
setattr(cc, name, val)
cfile = pjoin(basedir, 'vers.c')
efile = pjoin(basedir, 'vers')
f = open(cfile, 'w')
try:
f.write(
r"""
#include <stdio.h>
#include "zmq.h"
int main(void){
int major, minor, patch;
zmq_version(&major, &minor, &patch);
fprintf(stdout, "vers: %d.%d.%d\n", major, minor, patch);
return 0;
}
""")
finally:
f.close()
cpreargs = lpreargs = None
if sys.platform == 'darwin':
# use appropriate arch for comiler
if platform.architecture()[0]=='32bit':
cpreargs = ['-arch','i386']
lpreargs = ['-arch', 'i386', '-undefined', 'dynamic_lookup']
else:
# allow for missing UB arch, since it will still work:
lpreargs = ['-undefined', 'dynamic_lookup']
objs = cc.compile([cfile],extra_preargs=cpreargs)
cc.link_executable(objs, efile, extra_preargs=lpreargs)
result = Popen(efile, stdout=PIPE, stderr=PIPE)
so, se = result.communicate()
# for py3k:
so = so.decode()
se = se.decode()
if result.returncode:
msg = "Error running version detection script:\n%s\n%s" % (so,se)
logging.error(msg)
raise IOError(msg)
handlers = {'vers': lambda val: tuple(int(v) for v in val.split('.'))}
props = {}
for line in (x for x in so.split('\n') if x):
key, val = line.split(':')
props[key] = handlers[key](val)
props['options'] = compiler_attrs
return props
def localpath(*args):
plist = [os.path.dirname(__file__)]+list(args)
return os.path.abspath(pjoin(*plist))
def loadpickle(name):
""" Load object from pickle file, or None if it can't be opened """
name = pjoin('conf', name)
try:
f = open(name,'rb')
except IOError:
# raise
return None
try:
return pickle.load(f)
except Exception:
# raise
return None
finally:
f.close()
def savepickle(name, data):
""" Save to pickle file, exiting if it can't be written """
if not os.path.exists('conf'):
os.mkdir('conf')
name = pjoin('conf', name)
try:
f = open(name, 'wb')
except IOError:
fatal("Can't open pickle file \"%s\" for writing" % name)
try:
pickle.dump(data, f, 0)
finally:
f.close()
def v_str(v_tuple):
"""turn (2,0,1) into '2.0.1'."""
return ".".join(str(x) for x in v_tuple)
def get_eargs():
""" Look for options in environment vars """
settings = {}
zmq = os.environ.get("ZMQ_DIR", '')
if zmq != '':
debug("Found environ var ZMQ_DIR=%s" % zmq)
settings['zmq'] = zmq
return settings
def get_cfg_args():
""" Look for options in setup.cfg """
settings = {}
zmq = ''
if not os.path.exists('setup.cfg'):
return settings
cfg = ConfigParser()
cfg.read('setup.cfg')
if 'build_ext' in cfg.sections() and \
cfg.has_option('build_ext', 'include_dirs'):
includes = cfg.get('build_ext', 'include_dirs')
include = includes.split(os.pathsep)[0]
if include.endswith('include') and os.path.isdir(include):
zmq = include[:-8]
if zmq != '':
debug("Found ZMQ=%s in setup.cfg" % zmq)
settings['zmq'] = zmq
return settings
def get_cargs():
""" Look for global options in the command line """
settings = loadpickle('buildconf.pickle')
if settings is None: settings = {}
for arg in sys.argv[:]:
if arg.find('--zmq=') == 0:
zmq = arg.split('=')[-1]
if zmq.lower() == 'default':
settings.pop('zmq', None)
else:
settings['zmq'] = zmq
sys.argv.remove(arg)
savepickle('buildconf.pickle', settings)
return settings
def discover_settings():
""" Discover custom settings for ZMQ path"""
settings = get_cfg_args() # lowest priority
settings.update(get_eargs())
settings.update(get_cargs()) # highest priority
return settings.get('zmq')
def copy_and_patch_libzmq(ZMQ, libzmq):
"""copy libzmq into source dir, and patch it if necessary.
This command is necessary prior to running a bdist on Linux or OS X.
"""
if sys.platform.startswith('win'):
return
# copy libzmq into zmq for bdist
local = localpath('zmq',libzmq)
if ZMQ is None and not os.path.exists(local):
fatal("Please specify zmq prefix via `setup.py configure --zmq=/path/to/zmq` "
"or copy libzmq into zmq/ manually prior to running bdist.")
try:
# resolve real file through symlinks
lib = os.path.realpath(pjoin(ZMQ, 'lib', libzmq))
print ("copying %s -> %s"%(lib, local))
shutil.copy(lib, local)
except Exception:
if not os.path.exists(local):
fatal("Could not copy libzmq into zmq/, which is necessary for bdist. "
"Please specify zmq prefix via `setup.py configure --zmq=/path/to/zmq` "
"or copy libzmq into zmq/ manually.")
if sys.platform == 'darwin':
# patch install_name on darwin, instead of using rpath
cmd = ['install_name_tool', '-id', '@loader_path/../%s'%libzmq, local]
try:
p = Popen(cmd, stdout=PIPE,stderr=PIPE)
except OSError:
fatal("install_name_tool not found, cannot patch libzmq for bundling.")
out,err = p.communicate()
if p.returncode:
fatal("Could not patch bundled libzmq install_name: %s"%err, p.returncode)
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