Refactor version generation and error handling in versioning scripts

SLS_Python/sls/_version.py

@@ -1,5 +1,7 @@
 import subprocess
 from datetime import datetime, timezone
+version = "0.0.1-alpha"
+try:
     __result_hash = subprocess.check_output(
         ["git", "describe", "--always", "--dirty", "--abbrev=7"],
         cwd=".",
@@ -12,6 +14,10 @@ __result_date = subprocess.check_output(
         stderr=subprocess.DEVNULL,
         text=True
     ).strip()
-version = "unknown"
     commit = __result_hash + " " + __result_date
+except:
+    commit = "unknown"
+try:
     timestamp = datetime.now(timezone.utc).isoformat() + "Z"
+except:
+    timestamp = "unknown"

SLS_Python/sls_build_backend/_version_dev.py.in

@@ -1,5 +1,7 @@
 import subprocess
 from datetime import datetime, timezone
+version = "{version}"
+try:
     __result_hash = subprocess.check_output(
         ["git", "describe", "--always", "--dirty", "--abbrev=7"],
         cwd=".",
@@ -12,6 +14,10 @@ __result_date = subprocess.check_output(
         stderr=subprocess.DEVNULL,
         text=True
     ).strip()
-version = "{version}"
     commit = __result_hash + " " + __result_date
+except:
+    commit = "unknown"
+try:
     timestamp = datetime.now(timezone.utc).isoformat() + "Z"
+except:
+    timestamp = "unknown"

SLS_Python/sls_build_backend/build_hooks.py

@@ -1,19 +1,17 @@
 from setuptools.build_meta import build_wheel as _build_wheel
 from setuptools.build_meta import build_sdist as _build_sdist
-from .write_version import main, clean_output
+from .write_version import generate_version, generate_version_dev
 
-def _generate_version():
-    main()
 
 def build_wheel(*args, **kwargs):
-    _generate_version()
+    generate_version()
     o = _build_wheel(*args, **kwargs)
-    clean_output()
+    generate_version_dev()
     return o
 
 
 def build_sdist(*args, **kwargs):
-    _generate_version()
+    generate_version()
     o = _build_sdist(*args, **kwargs)
-    clean_output()
+    generate_version_dev()
     return o

SLS_Python/sls_build_backend/write_version.py

@@ -1,48 +1,91 @@
+
 import subprocess
 import datetime
 import pathlib
 
+try:
+    import tomllib  # Python 3.11+
+except Exception:  # pragma: no cover - older Pythons
+    tomllib = None
+
 root = pathlib.Path(__file__).resolve().parents[1]
+# templates live inside the backend package
 template = root / "sls_build_backend" / "_version.py.in"
 template_dev = root / "sls_build_backend" / "_version_dev.py.in"
 output = root / "sls" / "_version.py"
 
+
 def get_commit():
     try:
         result_hash = subprocess.check_output(
             ["git", "describe", "--always", "--dirty", "--abbrev=7"],
-            cwd=".",
+            cwd=str(root),
             stderr=subprocess.DEVNULL,
-            text=True
+            text=True,
         ).strip()
         result_date = subprocess.check_output(
             ["git", "show", "-s", "--format=%ci"],
-            cwd=".",
+            cwd=str(root),
             stderr=subprocess.DEVNULL,
-            text=True
+            text=True,
         ).strip()
         return f"{result_hash} {result_date}"
     except Exception:
         return "unknown"
 
+
 def get_timestamp():
     return datetime.datetime.now(datetime.timezone.utc).isoformat() + "Z"
 
-def clean_output():
-    version = "unknown"
 
+def _get_version_from_pyproject(root_path: pathlib.Path):
+    py = root_path / "pyproject.toml"
+    if not py.exists() or tomllib is None:
+        return None
+    try:
+        data = tomllib.loads(py.read_text())
+    except Exception:
+        return None
+    # PEP 621
+    version = data.get("project", {}).get("version")
+    if version:
+        return version
+    # Some projects put metadata under tool.setuptools
+    version = data.get("tool", {}).get("setuptools", {}).get("version")
+    return version
+
+
+def _determine_version(root_path: pathlib.Path):
+    v = _get_version_from_pyproject(root_path)
+    if v:
+        return v
+    return "unknown"
+
+
+def generate_version_dev():
+    version = _determine_version(root)
+    if not template_dev.exists():
+        # write a minimal generated file if dev template missing
+        output.write_text(f"version = \"{version}\"\ncommit = \"unknown\"\ntimestamp = \"unknown\"\n")
+        return
     text = template_dev.read_text()
     text = text.format(version=version)
     output.write_text(text)
 
-def main():
-    version = "unknown"
+
+def generate_version():
+    version = _determine_version(root)
+
     commit = get_commit()
     timestamp = get_timestamp()
 
+    if not template.exists():
+        # fallback: write a minimal file
+        output.write_text(
+            f"version = \"{version}\"\ncommit = \"{commit}\"\ntimestamp = \"{timestamp}\"\n"
+        )
+        return
+
     text = template.read_text()
     text = text.format(version=version, commit=commit, timestamp=timestamp)
     output.write_text(text)
-
-if __name__ == "__main__":
-    main()