Fix passing ccount=None to template

Author: dolfinus

docs/changelog/3.0.x.rst

@@ -1,7 +1,7 @@
 3.0.x
 ======
 
-3.0.0 (2026-01-15)
+3.0.0 (2026-01-16)
 -------------------
 
 Breaking
@@ -28,3 +28,4 @@ Bug Fixes
 - Fix calling ``get_version(root=...)`` in combination with version-file strategy -
   relative file version was resolved against ``os.cwd``, not explicitly passed ``root``.
 - Fix epoch versions like ``0!2025.12.3`` were wrongly converted to ``0.2025.12.3`` (:github:issue:`122`).
+- Using version_file-based schema with shallow git clone lead to version numbers like ``1.2.3.postNone``, now it is ``1.2.3.post0`` (:github:issue:`104`).

setuptools_git_versioning/version.py

@@ -167,7 +167,7 @@ def version_from_git(  # noqa: PLR0915, PLR0912, PLR0913, C901
                 file_sha = get_latest_file_commit(version_file, root=root)
                 log.log(DEBUG, "File SHA-256: %r", file_sha)
 
-                ccount = count_since(file_sha, root=root) if file_sha is not None else None
+                ccount = count_since(file_sha, root=root) if file_sha else None
                 log.log(INFO, "Commits count between HEAD and last version file change: %r", ccount)
 
     elif not head_sha:
@@ -208,6 +208,6 @@ def version_from_git(  # noqa: PLR0915, PLR0912, PLR0913, C901
         t = template
 
     full_sha = head_sha if head_sha is not None else ""
-    version = resolve_substitutions(t, sha=full_sha[:8], tag=tag, ccount=ccount, branch=branch, full_sha=full_sha)
+    version = resolve_substitutions(t, sha=full_sha[:8], tag=tag, ccount=ccount or 0, branch=branch, full_sha=full_sha)
     log.log(INFO, "Version number after resolving substitutions: %r", version)
     return sanitize_version(version)

tests/test_integration/test_version_file.py

@@ -6,6 +6,7 @@
     create_commit,
     create_file,
     create_tag,
+    execute,
     get_full_sha,
     get_sha,
     get_version,
@@ -210,6 +211,21 @@ def test_version_file_tagged_head(repo, create_config):
     assert get_version(repo) == "1.0.0"
 
 
+def test_version_file_with_shallow_clone(repo, create_config):
+    execute(repo, "git", "checkout", "--orphan", "disembed")
+    create_file(repo, "VERSION.txt", "1.0.0", commit=False)
+    create_config(
+        repo,
+        {
+            "version_file": "VERSION.txt",
+            "count_commits_from_version_file": True,
+        },
+        commit=False,
+    )
+
+    assert get_version(repo) == "1.0.0.post0+git.dirty"
+
+
 @pytest.mark.parametrize(("starting_version", "version"), [(None, "0.0.1"), ("1.2.3", "1.2.3")])
 @pytest.mark.parametrize("create_version", [True, False])
 def test_version_file_missing(repo, create_config, create_version, starting_version, version):