deduce version from git if ran from source

Author: 3nids

pum/pum_config.py

@@ -8,6 +8,7 @@
 import importlib.metadata
 import glob
 import os
+import subprocess
 from typing import TYPE_CHECKING
 
 from .dependency_handler import DependencyHandler
@@ -26,7 +27,6 @@
 
 try:
     PUM_VERSION = packaging.version.Version(importlib.metadata.version("pum"))
-    PUM_VERSION = packaging.version.Version("9.9.9")
 except importlib.metadata.PackageNotFoundError:
     # Fallback: try to read from pum-*.dist-info/METADATA
     dist_info_dirs = glob.glob(os.path.join(os.path.dirname(__file__), "..", "pum-*.dist-info"))
@@ -44,8 +44,47 @@
         # Pick the highest version
         PUM_VERSION = max((packaging.version.Version(v) for v in versions))
     else:
-        PUM_VERSION = packaging.version.Version("0.0.0")
-        PUM_VERSION = packaging.version.Version("0.8.9")
+        # Fallback: try to get version from git (for development from source)
+        try:
+            git_dir = Path(__file__).parent.parent / ".git"
+            if git_dir.exists():
+                result = subprocess.run(
+                    ["git", "describe", "--tags", "--always", "--dirty"],
+                    cwd=Path(__file__).parent.parent,
+                    capture_output=True,
+                    text=True,
+                    check=False,
+                )
+                if result.returncode == 0 and result.stdout.strip():
+                    git_version = result.stdout.strip()
+                    # Clean up git version to be PEP 440 compatible
+                    # e.g., "0.9.2-10-g1234567" -> "0.9.2.post10"
+                    # e.g., "0.9.2" -> "0.9.2"
+                    # e.g., "1234567" (no tags) -> "0.0.0+1234567"
+                    if "-" in git_version:
+                        parts = git_version.split("-")
+                        if len(parts) >= 3 and parts[0][0].isdigit():
+                            # Tagged version with commits after: "0.9.2-10-g1234567"
+                            base_version = parts[0]
+                            commits_after = parts[1]
+                            PUM_VERSION = packaging.version.Version(
+                                f"{base_version}.post{commits_after}"
+                            )
+                        else:
+                            # Untagged: just use the commit hash
+                            PUM_VERSION = packaging.version.Version(f"0.0.0+{parts[0]}")
+                    elif git_version[0].isdigit():
+                        # Clean tag version
+                        PUM_VERSION = packaging.version.Version(git_version)
+                    else:
+                        # Just a commit hash (no tags)
+                        PUM_VERSION = packaging.version.Version(f"0.0.0+{git_version}")
+                else:
+                    PUM_VERSION = packaging.version.Version("0.0.0")
+            else:
+                PUM_VERSION = packaging.version.Version("0.0.0")
+        except Exception:
+            PUM_VERSION = packaging.version.Version("0.0.0")
 
 
 logger = logging.getLogger(__name__)