Extract metadata directly from source

tomschr · tomschr · commit 043a7158bc3a · 2020-10-21T16:52:21.000+02:00
This affects all the __version__, __author__ etc.
diff --git a/semver.py b/semver.py
@@ -1,4 +1,4 @@
-"""Python helper for Semantic Versioning (http://semver.org/)"""
+"""Python helper for Semantic Versioning (http://semver.org)"""
 from __future__ import print_function
 
 import argparse
@@ -15,6 +15,7 @@
 __author_email__ = "k-bx@k-bx.com"
 __maintainer__ = ["Sebastien Celles", "Tom Schraitle"]
 __maintainer_email__ = "s.celles@gmail.com"
+__description__ = "Python helper for Semantic Versioning (http://semver.org)"
 
 #: Our public interface
 __all__ = (
@@ -222,11 +223,7 @@ class VersionInfo(object):
 
     def __init__(self, major, minor=0, patch=0, prerelease=None, build=None):
         # Build a dictionary of the arguments except prerelease and build
-        version_parts = {
-            "major": major,
-            "minor": minor,
-            "patch": patch,
-        }
+        version_parts = {"major": major, "minor": minor, "patch": patch}
 
         for name, value in version_parts.items():
             value = int(value)
diff --git a/setup.py b/setup.py
@@ -1,30 +1,51 @@
 #!/usr/bin/env python3
-import semver as package
+# import semver as package
 from os.path import dirname, join
 from setuptools import setup
+import re
+
+
+VERSION_MATCH = re.compile(r"__version__ = ['\"]([^'\"]*)['\"]", re.M)
 
 
 def read_file(filename):
     with open(join(dirname(__file__), filename)) as f:
         return f.read()
 
 
+def find_meta(meta):
+    """
+    Extract __*meta*__ from META_FILE.
+    """
+    meta_match = re.search(
+        r"^__{meta}__ = ['\"]([^'\"]*)['\"]".format(meta=meta), META_FILE, re.M
+    )
+    if meta_match:
+        return meta_match.group(1)
+    raise RuntimeError("Unable to find __{meta}__ string.".format(meta=meta))
+
+
+NAME = "semver"
+META_FILE = read_file("semver.py")
+
+
+# -----------------------------------------------------------------------------
 setup(
-    name=package.__name__,
-    version=package.__version__,
-    description=package.__doc__.strip(),
+    name=NAME,
+    version=find_meta("version"),
+    description=find_meta("description").strip(),
     long_description=read_file("README.rst"),
     long_description_content_type="text/x-rst",
-    author=package.__author__,
-    author_email=package.__author_email__,
+    author=find_meta("author"),
+    author_email=find_meta("author_email"),
     url="https://github.com/python-semver/python-semver",
     download_url="https://github.com/python-semver/python-semver/downloads",
     project_urls={
         "Documentation": "https://python-semver.rtfd.io",
         "Releases": "https://github.com/python-semver/python-semver/releases",
         "Bug Tracker": "https://github.com/python-semver/python-semver/issues",
     },
-    py_modules=[package.__name__],
+    py_modules=[NAME],
     include_package_data=True,
     license="BSD",
     classifiers=[
