purge_old_helm_revisions.sh

#!/bin/bash

# List all Helm releases in the cluster
helm list --all-namespaces --short | while read -r release; do
    echo "Processing release: $release"
    # Get revision history for the release
    revisions=$(helm history "$release" --short | tail -n +2)
    
    # Keep the latest revision
    latest_revision=$(echo "$revisions" | head -n 1)
    
    # Remove all revisions except the latest
    echo "$revisions" | while read -r revision; do
        if [[ "$revision" != "$latest_revision" ]]; then
            echo "Deleting revision: $revision"
            helm rollback "$release" "$revision"
        fi
    done
done