Exclude RC/beta/alpha versions from PostgreSQL CI testing matrix

Author: N6REJ

.github/workflows/postgresql-test.yml

@@ -49,9 +49,13 @@ jobs:
             echo "Testing specific version: $VERSION"
             VERSIONS="[\"$VERSION\"]"
           else
-            # Get all versions from releases.properties
-            VERSIONS=$(grep -E "^[0-9]+\.[0-9]+" releases.properties | cut -d'=' -f1 | tr -d ' ' | jq -R -s -c 'split("\n") | map(select(length > 0)) | unique | sort_by(split(".") | map(tonumber)) | reverse | .[0:5]')
-            echo "Testing latest 5 versions"
+            # Get all versions from releases.properties, excluding RC/beta versions
+            VERSIONS=$(grep -E "^[0-9]+\.[0-9]+" releases.properties | \
+              grep -v -E "(RC|beta|alpha)" | \
+              cut -d'=' -f1 | \
+              tr -d ' ' | \
+              jq -R -s -c 'split("\n") | map(select(length > 0)) | unique | sort_by(split(".") | map(tonumber)) | reverse | .[0:5]')
+            echo "Testing latest 5 stable versions (excluding RC/beta/alpha)"
           fi
           
           echo "versions=$VERSIONS" >> $GITHUB_OUTPUT