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Merge pull request esheldon#63 from rainwoodman/build_ext
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Use a subclass of build_ext to build cfitsio.
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@esheldon
esheldon committed Oct 23, 2015
2 parents 2ee7fd7 + 5c4dfa8 commit 96e2b35
Showing 1 changed file with 124 additions and 89 deletions.
213 changes: 124 additions & 89 deletions setup.py
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Original file line number Diff line number Diff line change
@@ -1,120 +1,152 @@
import distutils
from distutils.core import setup, Extension, Command
from distutils.command.build_ext import build_ext

import os
import sys
import numpy
import glob
import shutil
import platform

libs = []
class build_ext_subclass(build_ext):
boolean_options = build_ext.boolean_options + ['use-system-fitsio']
user_options = build_ext.user_options + \
[('use-system-fitsio', None,
"Use the cfitsio installed in the system")]

if "--use-system-fitsio" not in sys.argv:
compile_fitsio_package = True
else:
compile_fitsio_package = False
sys.argv.remove("--use-system-fitsio")
def initialize_options(self):
self.use_system_fitsio = False
self.cfitsio_build_dir = ""

extra_objects = None
include_dirs=[numpy.get_include()]
if platform.system()=='Darwin':
extra_compile_args=['-arch','x86_64']
extra_link_args=['-arch','x86_64']
else:
extra_compile_args=[]
extra_link_args=[]

if compile_fitsio_package:
package_basedir = os.path.abspath(os.curdir)

#cfitsio_version = '3280patch'
cfitsio_version = '3370patch'
cfitsio_dir = 'cfitsio%s' % cfitsio_version
cfitsio_build_dir = os.path.join('build',cfitsio_dir)
cfitsio_zlib_dir = os.path.join(cfitsio_build_dir,'zlib')

makefile = os.path.join(cfitsio_build_dir, 'Makefile')

def copy_update(dir1,dir2):
f1 = os.listdir(dir1)
for f in f1:
path1 = os.path.join(dir1,f)
path2 = os.path.join(dir2,f)

if os.path.isdir(path1):
if not os.path.exists(path2):
os.makedirs(path2)
copy_update(path1,path2)
else:
if not os.path.exists(path2):
shutil.copy(path1,path2)
self.package_basedir = os.path.abspath(os.curdir)

#cfitsio_version = '3280patch'
self.cfitsio_version = '3370patch'
self.cfitsio_dir = 'cfitsio%s' % self.cfitsio_version
self.cfitsio_build_dir = os.path.join('build', self.cfitsio_dir)
self.cfitsio_zlib_dir = os.path.join(self.cfitsio_build_dir,'zlib')

build_ext.initialize_options(self)
self.link_objects = []
self.extra_link_args = []

def finalize_options(self):

build_ext.finalize_options(self)

if self.use_system_fitsio:
# Include bz2 by default? Depends on how system cfitsio was built.
# FIXME: use pkg-config to tell if bz2 shall be included ?
self.extra_link_args.append('-lcfitsio')
else:
# We defer configuration of the bundled cfitsio to build_extensions
# because we will know the compiler there.
self.include_dirs.append(self.cfitsio_dir)


def build_extensions(self):
if not self.use_system_fitsio:

# Use the compiler for building python to build cfitsio
# for maximized compatibility.

self.configure_cfitsio(CC=self.compiler.compiler,
ARCHIVE=self.compiler.archiver,
RANLIB=self.compiler.ranlib)

# If configure detected bzlib.h, we have to link to libbz2

if '-DHAVE_BZIP2=1' in open(os.path.join(self.cfitsio_build_dir, 'Makefile')).read():
self.compiler.add_library('bz2')

self.compile_cfitsio()

# link against the .a library in cfitsio;
# It should have been a 'static' library of relocatable objects (-fPIC),
# since we use the python compiler flags

link_objects = glob.glob(os.path.join(self.cfitsio_build_dir,'*.a'))

self.compiler.set_link_objects(link_objects)

# Ultimate hack: append the .a files to the dependency list
# so they will be properly rebuild if cfitsio source is updated.
for ext in self.extensions:
ext.depends += link_objects

# call the original build_extensions

build_ext.build_extensions(self)

def configure_cfitsio(self, CC=None, ARCHIVE=None, RANLIB=None):

# prepare source code and run configure
def copy_update(dir1,dir2):
f1 = os.listdir(dir1)
for f in f1:
path1 = os.path.join(dir1,f)
path2 = os.path.join(dir2,f)

if os.path.isdir(path1):
if not os.path.exists(path2):
os.makedirs(path2)
copy_update(path1,path2)
else:
stat1 = os.stat(path1)
stat2 = os.stat(path2)
if (stat1.st_mtime > stat2.st_mtime):
if not os.path.exists(path2):
shutil.copy(path1,path2)
else:
stat1 = os.stat(path1)
stat2 = os.stat(path2)
if (stat1.st_mtime > stat2.st_mtime):
shutil.copy(path1,path2)

def configure_cfitsio():
os.chdir(cfitsio_build_dir)
ret=os.system('sh ./configure --with-bzip2')
if ret != 0:
raise ValueError("could not configure cfitsio %s" % cfitsio_version)
os.chdir(package_basedir)

def compile_cfitsio():
os.chdir(cfitsio_build_dir)
ret=os.system('make')
if ret != 0:
raise ValueError("could not compile cfitsio %s" % cfitsio_version)
os.chdir(package_basedir)

if not os.path.exists('build'):
ret=os.makedirs('build')

if not os.path.exists('build'):
ret=os.makedirs('build')
if not os.path.exists(self.cfitsio_build_dir):
ret=os.makedirs(self.cfitsio_build_dir)

if not os.path.exists(cfitsio_build_dir):
ret=os.makedirs(cfitsio_build_dir)
copy_update(self.cfitsio_dir, self.cfitsio_build_dir)

copy_update(cfitsio_dir, cfitsio_build_dir)
makefile = os.path.join(self.cfitsio_build_dir, 'Makefile')

if not os.path.exists(makefile):
configure_cfitsio()
if os.path.exists(makefile):
# Makefile already there
return

compile_cfitsio()
args = ''
args += ' CC="%s"' % ' '.join(CC[:1])
args += ' CFLAGS="%s"' % ' '.join(CC[1:])

if ARCHIVE:
args += ' ARCHIVE="%s"' % ' '.join(ARCHIVE)
if RANLIB:
args += ' RANLIB="%s"' % ' '.join(RANLIB)

# when using "extra_objects" in Extension, changes in the objects do *not*
# cause a re-link! The only way I know is to force a recompile by removing the
# directory
build_libdir=glob.glob(os.path.join('build','lib*'))
if len(build_libdir) > 0:
shutil.rmtree(build_libdir[0])
os.chdir(self.cfitsio_build_dir)
ret=os.system('sh ./configure --with-bzip2 ' + args)
if ret != 0:
raise ValueError("could not configure cfitsio %s" % self.cfitsio_version)
os.chdir(self.package_basedir)

extra_objects = glob.glob(os.path.join(cfitsio_build_dir,'*.o'))
extra_objects += glob.glob(os.path.join(cfitsio_zlib_dir,'*.o'))
def compile_cfitsio(self):
os.chdir(self.cfitsio_build_dir)
ret=os.system('make')
if ret != 0:
raise ValueError("could not compile cfitsio %s" % self.cfitsio_version)
os.chdir(self.package_basedir)

include_dirs.append(cfitsio_dir)

if not compile_fitsio_package:
extra_link_args.append('-lcfitsio')
include_dirs=[numpy.get_include()]


sources = ["fitsio/fitsio_pywrap.c"]
data_files=[]

if compile_fitsio_package:
# If configure detected bzlib.h, we have to link to libbz2.so
if '-DHAVE_BZIP2=1' in open(os.path.join(cfitsio_build_dir, 'Makefile')).read():
libs.append('bz2')
else:
# Include bz2 by default? Depends on how system cfitsio was built.
pass

ext=Extension("fitsio._fitsio_wrap",
sources,
libraries=libs,
extra_objects=extra_objects,
extra_compile_args=extra_compile_args,
extra_link_args=extra_link_args,
include_dirs=include_dirs)
sources, include_dirs=include_dirs)

description = ("A full featured python library to read from and "
"write to FITS files.")
Expand Down Expand Up @@ -145,7 +177,10 @@ def compile_cfitsio():
packages=['fitsio'],
data_files=data_files,
ext_modules=[ext],
cmdclass = {"build_py":build_py})
cmdclass = {
"build_py":build_py,
"build_ext": build_ext_subclass}
)



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