Fix version detection.

The previous code was adding `__version__` to the globals which was then
ignored as there was a local version of the same name.

The new code is a lot more strict and no longer uses exec.

The verbose pip install wasn't needed.

.github/workflows/python-package.yml

@@ -97,7 +97,7 @@ jobs:
         name: sdist
     - name: Build package in isolation
       run: |
-        pip install -v tcod-*.tar.gz
+        pip install tcod-*.tar.gz
     - name: Confirm package import
       run: |
         python -c "import tcod"

CHANGELOG.rst

@@ -8,6 +8,8 @@ v2.0.0
 
 Unreleased
 ------------------
+Fixed
+ - Fixed version mismatch when building from sources.
 
 12.6.0 - 2021-06-09
 -------------------
@@ -19,9 +21,6 @@ Deprecated
  - The handling of negative indexes given to console drawing and printing
    functions will be changed to be used as absolute coordinates in the future.
 
-Fixed
- - Fixed version mismatch when building from sources.
-
 12.5.1 - 2021-05-30
 -------------------
 Fixed

setup.py

@@ -3,6 +3,7 @@
 import os
 import pathlib
 import platform
+import re
 import sys
 import warnings
 from subprocess import CalledProcessError, check_output
@@ -37,12 +38,13 @@ def get_version() -> str:
         return version
     except CalledProcessError:
         try:
-            __version__ = "0.0.0"
             with open(PATH / "tcod/version.py") as version_file:
-                exec(version_file.read(), globals())  # Update __version__
+                match = re.match(r'__version__ = "(\S+)"', version_file.read())
+            assert match
+            return match.groups()[0]
         except FileNotFoundError:
-            warnings.warn("Unknown version: " "Not in a Git repository and not from a sdist bundle or wheel.")
-        return __version__
+            warnings.warn("Unknown version: Not in a Git repository and not from a sdist bundle or wheel.")
+        return "0.0.0"
 
 
 is_pypy = platform.python_implementation() == "PyPy"