Get version from setuptools-scm, remove VERSION.txt

Author: dbarnett

.gitignore

@@ -1,4 +1,5 @@
 /deb_dist/
+/vimdoc/_version.py
 
 # Python.gitignore:
 # Byte-compiled / optimized / DLL files

MANIFEST.in

@@ -1,4 +1,3 @@
 include README.md
-include vimdoc/VERSION.txt
 
 graft tests

VERSION.txt

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=61.2"]
+requires = ["setuptools>=64", "setuptools-scm>=8"]
 build-backend = "setuptools.build_meta"
 
 [project]
@@ -26,5 +26,5 @@ completion = ["shtab"]
 packages = ["vimdoc"]
 script-files = ["scripts/vimdoc"]
 
-[tool.setuptools.dynamic]
-version = { file = "VERSION.txt" }
+[tool.setuptools_scm]
+version_file = "vimdoc/_version.py"

pyproject.toml

@@ -1,19 +1,20 @@
 """Vimdoc: Vim helpfile generation."""
 import sys
 
+try:
+  from vimdoc._version import __version__ as __version__
+except ImportError:
+  import warnings
+  warnings.warn('Failed to load __version__ from setuptools-scm')
+  __version__ = '__unknown__'
+
 
 # Don't even try to run under python 2 or earlier. It will seem to work but fail
 # in corner cases with strange encoding errors.
 if sys.version_info[0] < 3:
   raise ImportError('Python < 3 is unsupported')
 
 
-def __read_version_txt():
-  import pkgutil
-  return pkgutil.get_data('vimdoc', 'VERSION.txt').decode('utf-8').strip()
-
-__version__ = __read_version_txt()
-
 SECTION = 'SECTION'
 BACKMATTER = 'BACKMATTER'
 EXCEPTION = 'EXCEPTION'