Yaml/Json Cheatsheet

yaml_json_cheatsheet.sh

brew install jq
brew install yq

# render a helm chart to it's yaml parts
helm fetch --repo https://containous.github.io/traefik-helm-chart --untar --untardir ./charts traefik
helm template --output-dir ./manifests ./charts/traefik

# OR

helm template --output-dir ./loki-fluent-bit loki/fluent-bit

# given a large multi-document yaml file, convert it to a json array

yq r -d'*' crds.yaml --collect --tojson | jq '.' > crds.json

# convert a json array of kubernetes manifests into map

jq 'map( { (.kind + "." + .metadata.name|tostring): . } ) | add' crds.json > crds-named.json

# convert json to jsonnet (just the keys)
sed "s/\"\(\w+)\":/\1:/g" crds-named.json > crds-named.jsonnet

# convert a map to named yaml files

jsonnet -J vendor -m manifests example.jsonnet | xargs -I{} sh -c 'cat {} | yq r -P - > {}.yaml; rm -f {}' -- {}