changed versioneer style

pyproject.toml

@@ -12,7 +12,7 @@ markers = "slow: marks tests as slow (deselect with '-m \"not slow\"')"
 
 [tool.versioneer]
 VCS = "git"
-style = "pep440"
+style = "pep440-post"
 versionfile_source = "saqc/_version.py"
 versionfile_build = "saqc/_version.py"
 tag_prefix = "v"

setup.py

@@ -14,14 +14,20 @@ with open("README.md", "r") as fh:
 
 name = os.environ.get("PYPI_PKG_NAME", "saqc")
 if not name:
+    raise ValueError("Environment variable PYPI_PKG_NAME must not be an empty string.")
+
+versions = versioneer.get_versions()
+print(f"Building saqc: {versions}")
+if versions["dirty"]:
     raise ValueError(
-        "Environment variable PYPI_PKG_NAME must not be an empty string."
+        f"The repository you build is dirty. Please commit changes first {versions=}."
     )
-
-version = versioneer.get_version()
-if "dirty" in version:
+version = versions["version"]
+if "post" in version and name == "saqc":
     raise ValueError(
-        f"The repository you build is dirty. Please commit changes first. {version=}"
+        f"An saqc release must have version in the format X.Y.Z, "
+        f"which requires a git tag on the same commit. Please set "
+        f"a tag, then build again. {versions=}"
     )
 
 setup(