MNT: Add setuptools_scm config

Author: effigies

.git_archival.txt

@@ -0,0 +1,4 @@
+node: $Format:%H$
+node-date: $Format:%cI$
+describe-name: $Format:%(describe:match=[0-9]*)$
+ref-names: $Format:%D$

.gitattributes

@@ -0,0 +1 @@
+.git_archival.txt export-subst

.gitignore

@@ -88,3 +88,7 @@ venv/
 .buildbot.patch
 .vscode
 for_testing/
+
+# Generated by setuptools_scm #
+###############################
+_version.py

pyproject.toml

@@ -1,6 +1,6 @@
 [build-system]
-requires = ["setuptools"]
-build-backend = "setuptools.build_meta:__legacy__"
+requires = ["setuptools", "setuptools_scm[toml]>=6.2"]
+build-backend = "setuptools.build_meta"
 
 [project]
 name = "nibabel"
@@ -24,7 +24,7 @@ classifiers = [
   "Programming Language :: Python :: 3.10",
   "Topic :: Scientific/Engineering",
 ]
-# Version from versioneer
+# Version from setuptools_scm
 dynamic = ["version"]
 
 [project.urls]
@@ -95,4 +95,7 @@ force-exclude = """
 [tool.isort]
 profile = "black"
 line_length = 99
-extend_skip = ["_version.py", "externals", "versioneer.py"]
+extend_skip = ["_version.py", "externals"]
+
+[tool.setuptools_scm]
+write_to = "nibabel/_version.py"