jq script to add a tag filter to every single panel (used for geth dashboard); assumes each panel already has at least one tag filter

add-grafana-tag-filter.jq

# '.panels[1].targets[0].tags |= map(select(.key == "chain" | not)) | .panels[1].targets[0].tags += ["swag"]'
def update_tags:
  .tags |= map(select(.key == "chain" | not)) | .tags += [{"condition": "AND", "key": "chain", "operator": "=~", "value": "/^$chain$/"}];

def update_targets:
  .targets |= map(if has("tags") then (. | update_tags) else . end);

.panels |= map(if has("targets") then (. | update_targets) else . end)