如何使用 JQ 将 JSON 值列表添加到键中

Question

I have an input file:

{
  "errands": [
    {
      "name": "broker-deregistrar",
      "label": "Deregister and Purge Instances",
      "impact_warning": null,
      "pre_delete": true
    },
    {
      "name": "delete-all-service-instances",
      "label": "Delete All Service Instances",
      "impact_warning": null,
      "pre_delete": true
    },
    {
      "name": "deregister-broker",
      "label": "Deregister On-Demand Service Broker",
      "impact_warning": null,
      "pre_delete": true
    }
  ]
}

I would like to reformat this to make the values of .name into a key with a fixed value like this:

{
"deploy_products": "all",
"errands": {
    "product_1_guid": {
      "run_pre_delete": {
        "broker-deregistrar": true,
        "delete-all-service-instances": true,
        "deregister-broker": true
      }
    }
  },
  "ignore_warnings": true
}

I can subset the values I want with this filter:

.errands[].name

which gives me:

"broker-deregistrar"
"delete-all-service-instances"
"deregister-broker"

but I want to get the selected values into a new JSON as keys.

while this kind of works,

.errands=(.product_1_guid=(.run_pre_delete=(.xxx=true | .yyy=true | .zzz=true)))

the list of errand names is variable in that they have different names and counts. ie the list of errands may only be "delete-apps", or even nothing at all.

and in the above example I need .xxx , .yyy and .zzz to come from the original JSON.

Answer 1

Generate the name-true pairs within an array constructor so that you can easily merge them with add and place the result wherever it belongs.

{
  deploy_products: "all",
  errands: {
    product_1_guid: {
      run_pre_delete: [
        { (.errands[].name): true }
      ] | add
    }
  },
  ignore_warnings: true
}

^{Online demo}