:snake: introduce setup.py and update .travis.yml

Former-commit-id: 5eada092e54f7ca2c932656642af1c8f75eaef33

.gitignore

@@ -101,3 +101,4 @@ tutorial/cmake-build-debug
 .vscode/
 .idea/
 site/
+*.egg-info/

.travis.yml

@@ -10,11 +10,8 @@ matrix:
         - mkdir external/glfw/include/GL
         - wget --no-check-certificate -P external/glfw/include/GL http://www.opengl.org/registry/api/GL/glcorearb.h
         - cd python
-        - mkdir build
-        - cd build
-        - cmake -DCMAKE_CXX_COMPILER=g++-4.8 -DCMAKE_C_COMPILER=gcc-4.8 -DLIBIGL_WITH_EMBREE=OFF -DLIBIGL_USE_STATIC_LIBRARY=ON ../
-        - make -j 2
-        - cd ../tutorial
+        - python3 setup.py develop
+        - cd tutorial
         - python3 101_FileIO.py || { cd ../; mkdir build2; cd build2; cmake -DCMAKE_CXX_COMPILER=g++-4.8 -DCMAKE_C_COMPILER=gcc-4.8 -DLIBIGL_WITH_EMBREE=OFF -DLIBIGL_USE_STATIC_LIBRARY=ON - DCHECK_UNDEFINED=ON ../; make -j 2; }
         - cd ../../
         - cd tutorial
@@ -53,11 +50,8 @@ matrix:
         # - brew upgrade cgal
         - git submodule update --init --recursive
         - cd python
-        - mkdir build
-        - cd build
-        - cmake ../
-        - make -j 2
-        - cd ../tutorial
+        - python setup.py develop
+        - cd tutorial
         - python 101_FileIO.py
         - cd ../../
         - cd tutorial

python/setup.py

@@ -0,0 +1,85 @@
+import os
+import re
+import sys
+import platform
+import subprocess
+
+from setuptools import setup, Extension
+from setuptools.command.build_ext import build_ext
+from distutils.version import LooseVersion
+from distutils.sysconfig import get_config_var
+from distutils.sysconfig import get_python_inc
+
+
+class CMakeExtension(Extension):
+
+    def __init__(self, name, sourcedir=''):
+        Extension.__init__(self, name, sources=[])
+        self.sourcedir = os.path.abspath(sourcedir)
+
+
+class CMakeBuild(build_ext):
+
+    def run(self):
+        try:
+            out = subprocess.check_output(['cmake', '--version'])
+        except OSError:
+            raise RuntimeError("CMake must be installed to build the following extensions: " +
+                               ", ".join(e.name for e in self.extensions))
+
+        if platform.system() == "Windows":
+            cmake_version = LooseVersion(
+                re.search(r'version\s*([\d.]+)', out.decode()).group(1))
+            if cmake_version < '3.1.0':
+                raise RuntimeError("CMake >= 3.1.0 is required on Windows")
+
+        for ext in self.extensions:
+            self.build_extension(ext)
+
+    def build_extension(self, ext):
+        extdir = os.path.abspath(os.path.dirname(
+            self.get_ext_fullpath(ext.name)))
+
+        python_library = str(get_config_var('LIBDIR'))
+        python_include_directory = str(get_python_inc())
+
+        cmake_args = ['-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=' + extdir,
+                      '-DPYTHON_EXECUTABLE=' + sys.executable,
+                      '-DPYTHON_LIBRARY=' + python_library,
+                      '-DPYTHON_INCLUDE_DIR=' + python_include_directory, ]
+
+        cfg = 'Debug' if self.debug else 'Release'
+        build_args = ['--config', cfg]
+
+        if platform.system() == "Windows":
+            cmake_args += [
+                '-DCMAKE_LIBRARY_OUTPUT_DIRECTORY_{}={}'.format(cfg.upper(), extdir)]
+            if sys.maxsize > 2**32:
+                cmake_args += ['-A', 'x64']
+            build_args += ['--', '/m']
+        else:
+            cmake_args += ['-DCMAKE_BUILD_TYPE=' + cfg]
+            build_args += ['--', '-j2']
+
+        env = os.environ.copy()
+        env['CXXFLAGS'] = '{} -DVERSION_INFO=\\"{}\\"'.format(env.get('CXXFLAGS', ''),
+                                                              self.distribution.get_version())
+        if not os.path.exists(self.build_temp):
+            os.makedirs(self.build_temp)
+
+        subprocess.check_call(['cmake', ext.sourcedir] +
+                              cmake_args, cwd=self.build_temp, env=env)
+        subprocess.check_call(['cmake', '--build', '.'] +
+                              build_args, cwd=self.build_temp)
+
+setup(
+    name='pyigl',
+    version='0.0.1',
+    author='Geometric Computing Lab @ NYU',
+    author_email='info@geometriccomputing.org',
+    description='',
+    long_description='',
+    ext_modules=[CMakeExtension('pyigl')],
+    cmdclass=dict(build_ext=CMakeBuild),
+    zip_safe=False,
+)