update package build and c-loading for local library distribution

Author: Ivan Dlugos

objectbox/c.py

@@ -1,9 +1,26 @@
 import ctypes.util
+import os
+import platform
 
 # This file contains C-API bindings based on the objectbox.h, linking to the 'objectbox' shared library
 
+
+def shlib_name(library: str) -> str:
+    """Returns the platform-specific name of the shared library"""
+    if platform.system() == 'Linux':
+        return 'lib' + library + '.so'
+    elif platform.system() == 'Windows':
+        return library + '.dll'
+    elif platform.system() == 'Darwin':
+        return 'lib' + library + '.dylib'
+    else:
+        assert False, 'Unsupported platform: ' + platform.system()
+
+
 # initialize the C library
-C = ctypes.CDLL(ctypes.util.find_library("objectbox"))
+lib_path = os.path.dirname(os.path.realpath(__file__))
+lib_path = os.path.join(lib_path, 'lib', platform.machine(), shlib_name('objectbox'))
+C = ctypes.CDLL(lib_path)
 
 assert C.obx_version_is_at_least(0, 5, 103) == 1, \
     "ObjectBox v0.5.103+ is not installed. " \

setup.py

@@ -11,11 +11,11 @@
     long_description=long_description,
     long_description_content_type="text/markdown",
     url="https://github.com/objectbox/objectbox-python",
-    packages=setuptools.find_packages(),
     python_requires='>=3.4, <4',
     license='Apache 2.0',
     classifiers=[
         "Development Status :: 3 - Alpha",
+
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.4",
         "Programming Language :: Python :: 3.5",
@@ -24,14 +24,27 @@
         "Programming Language :: Python :: 3.8",
         "Programming Language :: C",
         "Programming Language :: C++",
+
+        'Operating System :: POSIX :: Linux',
+        # 'Operating System :: MacOS',
+        # 'Operating System :: Microsoft :: Windows',
+
         "Topic :: Database",
         "Topic :: Database :: Database Engines/Servers",
         "Topic :: Database :: Front-Ends",
         "Topic :: Software Development",
         "Topic :: Software Development :: Libraries",
+
         "License :: OSI Approved :: Apache Software License",
-        "Operating System :: OS Independent",
         "Intended Audience :: Developers",
     ],
 
+    install_requires=[
+       'flatbuffers==1.11',
+    ],
+
+    packages=setuptools.find_packages(),
+    package_data={
+        'objectbox': ['lib/x86_64/*'],
+    }
 )