Add update-version-from-tag action to sync version in pyproject.toml with git tag

Author: MH0386

.trunk/trunk.yaml

@@ -56,13 +56,13 @@ actions:
     - trunk-upgrade-available
     - trunk-check-pre-commit
     - ensure-tag-matches-version
+    - update-version-from-tag
   definitions:
     - id: ensure-tag-matches-version
       description: Hooks to ensure git tag matches version in pyproject.toml
       triggers:
         - git_hooks:
             - pre-push
-            - pre-commit
       run: |
         #!/usr/bin/env bash
         set -e
@@ -91,6 +91,39 @@ actions:
           echo "Not on main/master branch - skipping tag validation."
         fi
         exit 0
+    - id: update-version-from-tag
+      description: Update version in pyproject.toml from git tag
+      triggers:
+        - git_hooks:
+            - pre-push
+      run: |
+        #!/usr/bin/env bash
+        set -e
+
+        # Check if we're on main or master branch
+        if git rev-parse --abbrev-ref HEAD | grep -q 'main\|master'; then
+          # Try to get the tag for the current commit, ignore errors
+          TAG=$(git describe --tags --exact-match "$(git log -n1 --pretty='%h')" 2>/dev/null || true)
+
+          # If no tag found, skip updating version entirely
+          if [ -z "$TAG" ]; then
+            echo "No tag found for the current commit - skipping version update."
+            exit 0
+          fi
+
+          # Update pyproject.toml version if it differs from the tag
+          VERSION=$(grep '^version =' pyproject.toml | sed -E 's/version = "(.*)"/\1/' 2>/dev/null || echo "")
+
+          if [ "$TAG" != "$VERSION" ]; then
+            echo "Updating version in pyproject.toml from '$VERSION' to '$TAG'."
+            uv version "$TAG"
+          else
+            echo "Version in pyproject.toml already matches tag '$TAG'."
+          fi
+        else
+          echo "Not on main/master branch - skipping version update."
+        fi
+        exit 0
 tools:
   enabled:
     - [email protected]