jq

jqlang.github.io/jq/

jq is like sed for JSON data - you can use it to slice and filter and map and transform structured data with the same ease that sed, awk, grep and friends let you play with text.

Filter a JSON array of objects by only outputting those that have a state that is NOT equal to “SUCCESS” or “SKIPPED”:

gh pr checks --json 'state,name,workflow,link' | \
  jq '.[] | select(.state != "SUCCESS" and .state != "SKIPPED")'

Map the JSON objects (from kubernetes) in the items array by first setting each item’s .metadata.name to the $podname variable, then collect the .spect.container[] items, and output the name and image of each container, along with the stored $podname variable.

kprod get -ojson pods -l app=identity-service | \
  jq -r '.items[] | .metadata.name as $podname | .spec.containers[] | {$podname, name, image}'