Fixed setup.py and setup.cfg

and 1 formatting issue

Author: KOLANICH

kaitaistruct.py

@@ -457,6 +457,7 @@ def __init__(self, max, actual, io, src_path):
         self.max = max
         self.actual = actual
 
+
 class ValidationNotAnyOfError(ValidationFailedError):
     """Signals validation failure: we required "actual" value to be
     from the list, but it turned out that it's not.

pyproject.toml

@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools>=44", "wheel", "pathlib2; python_version < '3'"]
+build-backend = "setuptools.build_meta"

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = kaitaistruct
-version = attr: kaitaistruct.__version__
+version = attr: __version__
 author = Kaitai Project
 author_email = greycat@kaitai.io
 url = http://kaitai.io
@@ -20,6 +20,7 @@ classifiers =
     Programming Language :: Python :: 3.5
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
     Programming Language :: Python :: Implementation :: CPython
     Programming Language :: Python :: Implementation :: PyPy
 
@@ -28,16 +29,19 @@ zip_safe = True
 include_package_data = True
 py_modules = kaitaistruct
 python_requires = >=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*
+install_requires =
+    enum34; python_version < "3.4"
+setup_requires =
+    setuptools>=44
+    wheel
+    pathlib2; python_version < "3"
 
 [bdist_wheel]
 # This flag says that the code is written to work on both Python 2 and Python
 # 3. If at all possible, it is good practice to do this. If you cannot, you
 # will need to generate wheels for each Python version that you support.
 universal=1
 
-[build-system]
-requires = ["setuptools", "wheel"]
-
 [pycodestyle]
 max-line-length = 140
 statistics = True

setup.py

@@ -1,10 +1,27 @@
-import os
 from setuptools import setup
-from setuptools.config import read_configuration
+import ast
+try:
+    from pathlib import Path
+except ImportError:
+    from pathlib2 import Path
 
-this_dir = os.path.dirname(__file__)
-cfg = read_configuration(os.path.join(this_dir, 'setup.cfg'))
-cfg["options"].update(cfg["metadata"])
-cfg = cfg["options"]
 
-setup(**cfg)
+def extract_global_vars(file):
+    t = file.read_bytes()
+    m = ast.parse(t)
+    res = {}
+    for s in m.body:
+        if isinstance(s, ast.Assign):
+            try:
+                v = ast.literal_eval(s.value)
+                for t in s.targets:
+                    if isinstance(t, ast.Name):
+                        res[t.id] = v
+            except ValueError:
+                continue
+
+    return res
+
+
+if __name__ == "__main__":
+    setup(version=extract_global_vars(Path(__file__).absolute().parent / "kaitaistruct.py")["__version__"])