Identify map keys, whose value is a map that has direct child enabled: true

[therealplato]

Hello, I am new to yq v4. I am running yq version 4.7.1. I read through the documentation but I haven't figured out the syntax to solve my need. Could anyone help?

Here is my document:

Cruise Control:
  speed: 100
  enabled: true
Headlights:
  broken: false
  enabled: false
Gearbox:
  tractionControl:
    enabled: true
  gear: 3
  neutral: false
Climate Control:
  temperature: 70
  enabled: true
Make: "Toyota"
Passengers: []

I do not know all possible top level keys. I am looking for a general solution to identify the set of top level keys that have an enabled: true child as their direct descendent, i.e. my desired output is:

Cruise Control
Climate Control

So far I have tried:

yq e '.[] | has("enabled")' demo.yaml
yq e '.[] | (.enabled==true)' demo.yaml
yq e '.[] | select(enabled==true)' demo.yaml
yq e '.[] | select(.enabled==true)' demo.yaml
yq e 'keys' demo.yaml

I've noticed that the Passengers: [] key causes problems. I think my next step is probably to filter out non-map values?

[mikefarah]

Although the example looks simple - it took me a while to get this one. Interested if there's something simpler and how it would be done in jq. Regardless:

yq e '. as $d | keys | .[] | select(. as $k | ( $d | .[$k] | select(tag=="!!map") | .enabled))' demo.yml

Basically we want to filter the keys of the yaml file, and to do that we need to use variables to control the context.

Each key we pass through a filter to see if it's a map in the original document and if it's enabled.

[therealplato]

Thanks very much @mikefarah ! Here's my jq (edit: jq-1.5-1-a5b5cbe) approach:

{
  "Cruise Control": {
    "speed": 100,
    "enabled": true
  },
  "Headlights": {
    "broken": false,
    "enabled": false
  },
  "Gearbox": {
    "tractionControl": {
      "enabled": true
    },
    "gear": 3,
    "neutral": false
  },
  "Climate Control": {
    "temperature": 70,
    "enabled": true
  },
  "Make": "Toyota",
  "Passengers": []
}

jq -r 'to_entries | .[] | select(.value.enabled?==true) | .key' demo.json
Cruise Control
Climate Control

[mikefarah]

Ahh that's what I need to add in yq, the entries functions 👍🏼

[mikefarah]

That's much nicer - I've added the to_entries operator and the ? feature in 4.8.0 :)