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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Setup helpers for PyGraphviz.
"""
# Copyright (C) 2006-2010 by
# Aric Hagberg <hagberg@lanl.gov>
# Dan Schult <dschult@colgate.edu>
# Manos Renieris, http://www.cs.brown.edu/~er/
# Distributed with BSD license.
# All rights reserved, see LICENSE for details.
from __future__ import print_function
from __future__ import absolute_import
import subprocess as S
import sys
def _b2str(buffer):
result = u''
if sys.version_info >= (3, 0):
encoding = sys.getfilesystemencoding()
if not encoding:
# can be run without stdout
if sys.stdout and sys.stdout.encoding:
# encoding is nont None only staring Python 3.2
encoding = sys.stdout.encoding
else:
# fall back to default encoding ( normally it should not happen)
encoding = 'utf8'
if buffer:
result = buffer.decode(encoding)
return result
else:
return buffer
def _pkg_config():
# attempt to find graphviz installation with pkg-config
# should work with modern versions of graphviz
library_path=None
include_path=None
try:
output = S.check_output(['pkg-config', '--libs-only-L', 'libcgraph'])
output = _b2str(output)
if output:
library_path=output.strip()[2:]
output = S.check_output(['pkg-config', '--cflags-only-I', 'libcgraph'])
output = _b2str(output)
if output:
include_path=output.strip()[2:]
except OSError:
print("Failed to find pkg-config")
return include_path, library_path
def _dotneato_config():
# find graphviz configuration with dotneato-config
# works with older versions of graphviz
# attempt to find graphviz installation with pkg-config
# should work with modern versions of graphviz
library_path=None
include_path=None
try:
output = S.check_output(['dotneato-config', '--ldflags', '--cflags'])
output = _b2str(output)
if output:
include_path, library_path = output.split()
library_path = library_path.strip()[2:]
include_path = include_path.strip()[2:]
except OSError:
print("Failed to find dotneato-config")
# fall through and test the other syntax
if not include_path and not library_path:
try:
output = S.check_output(['dotneato-config', '--libs', '--cflags'])
output = _b2str(output)
if output:
include_path, library_path = output.split('\n',1)
library_path = library_path.strip()[2:]
include_path = include_path.strip()[2:]
except OSError:
print("Failed to find dotneato-config")
return include_path, library_path
def get_graphviz_dirs():
"""
First try to read include_dirs from
:return: tuple of lists ([include_dirs], [library_dirs], [define_macros])
"""
# If the setup script couldn't find your graphviz installation you can
# specify it here by uncommenting these lines or providing your own:
# You must set both 'library_dirs' and 'include_dirs'
# Linux, generic UNIX
#library_dirs='/usr/lib/graphviz'
#include_dirs='/usr/include/graphviz'
# OSX, Linux, alternate location
#library_dirs='/usr/local/lib/graphviz'
#include_dirs='/usr/local/include/graphviz'
# OSX (Fink)
#library_dirs='/sw/lib/graphviz'
#include_dirs='/sw/include/graphviz'
# OSX (MacPorts)
#library_dirs='/opt/local/lib/graphviz'
#include_dirs='/opt/local/include/graphviz'
# Windows
# Unknown - use command line -I and -L switches to set
include_dirs = None
library_dirs = None
if sys.platform != "win32":
# Attempt to find Graphviz installation
if library_dirs is None and include_dirs is None:
print("Trying pkg-config")
include_dirs, library_dirs = _pkg_config()
if library_dirs is None and include_dirs is None:
print("Trying dotneato-config")
include_dirs, library_dirs = _dotneato_config()
if library_dirs is None or include_dirs is None:
print()
print("""Your Graphviz installation could not be found.
1) You don't have Graphviz installed:
Install Graphviz (http://graphviz.org)
2) Your Graphviz package might incomplete.
Install the binary development subpackage (e.g. libgraphviz-dev or similar.)
3) You are using Windows
There are no PyGraphviz binary packages for Windows but you might be
able to build it from this source. See
http://networkx.lanl.gov/pygraphviz/reference/faq.html
If you think your installation is correct you will need to manually
change the include_dirs and library_dirs variables in setup.py to
point to the correct locations of your graphviz installation.
The current setting of library_dirs and include_dirs is:""")
print("library_dirs=%s"%library_dirs)
print("include_dirs=%s"%include_dirs)
print()
raise OSError("Error locating graphviz.")
print("include_dirs=%s" % include_dirs)
print("library_dirs=%s" % library_dirs)
return include_dirs, library_dirs
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