Enable back snapshots publishing

Ref: duckdb#546

Author: staticlibs

.github/workflows/Java.yml

@@ -734,7 +734,7 @@ jobs:
   # SNAPSHOTs don't require GPG signatures or validation
   # See: https://central.sonatype.org/publish/publish-portal-snapshots/
   maven-snapshot-deploy:
-    if: ${{ false && github.repository == 'duckdb/duckdb-java' && github.ref == 'refs/heads/main' && github.event_name == 'push' }}
+    if: ${{ github.repository == 'duckdb/duckdb-java' && github.ref == 'refs/heads/main' && github.event_name == 'push' }}
     name: Maven SNAPSHOT Deploy
     runs-on: ubuntu-latest
     timeout-minutes: 30

scripts/jdbc_maven_deploy_snapshot.py

@@ -68,9 +68,9 @@ def get_snapshot_version():
     """
     Calculate SNAPSHOT version from the last release tag and current commit.
 
-    DuckDB uses 4-part versioning (e.g., v1.4.4.0). We increment the third
-    component (patch) and reset the fourth to 0 for SNAPSHOTs.
-    Example: v1.4.4.0 + commit abc1234 -> 1.4.5.0-abc1234-SNAPSHOT
+    DuckDB uses 4-part versioning (e.g., v1.4.4.0). We increment the second
+    component (minor) and remove the third and fourth for SNAPSHOTs.
+    Example: v1.4.4.0 + commit abc1234 -> 1.5-abc1234-SNAPSHOT
     """
     last_tag = run_cmd('git tag --sort=-committerdate').split('\n')[0]
     version_regex = re.compile(r'^v(\d+)\.(\d+)\.(\d+)\.(\d+)$')
@@ -84,7 +84,7 @@ def get_snapshot_version():
     # Get short commit hash for traceability
     commit_hash = run_cmd('git rev-parse --short HEAD')
     # Increment patch version and include commit hash
-    return f"{major}.{minor}.{patch + 1}.0-{commit_hash}-SNAPSHOT"
+    return f"{major}.{minor + 1}-{commit_hash}-SNAPSHOT"
 
 
 def create_settings_xml(settings_path):