how to replace entire array using jq in shell script?

Question

Having the following structure:

{
  "DistributionConfig": {
    "DefaultCacheBehavior": {
      "LambdaFunctionAssociations": {
        "Quantity": 3,
        "Items": [
          {
            "LambdaFunctionARN": "3",
            "EventType": "origin-response",
            "IncludeBody": false
          },
          {
            "LambdaFunctionARN": "2",
            "EventType": "viewer-request",
            "IncludeBody": false
          },
          {
            "LambdaFunctionARN": "1",
            "EventType": "origin-request",
            "IncludeBody": false
          }
        ]
      }
    }
  }
}

I extracted the items and modified them using the following:

export lambdaFunctionAssociations=$(echo $json |  jq '.DistributionConfig.DefaultCacheBehavior.LambdaFunctionAssociations.Items' |
 jq 'map(if .EventType == "origin-response"
          then . + {"LambdaFunctionARN":'$originResponse'}
          else .
          end
         )'  |
jq 'map(if .EventType == "viewer-request"
          then . + {"LambdaFunctionARN":'$viewerRequest'}
          else .
          end
         )' |
jq 'map(if .EventType == "origin-request"
          then . + {"LambdaFunctionARN":'$originRequest'}
          else .
          end
         )')

Now I have the following stored in lambdaFunctionAssociations:

[
  {
    "LambdaFunctionARN": "ZZZ",
    "EventType": "origin-response",
    "IncludeBody": false
  },
  {
    "LambdaFunctionARN": "YYY",
    "EventType": "viewer-request",
    "IncludeBody": false
  },
  {
    "LambdaFunctionARN": "XXX",
    "EventType": "origin-request",
    "IncludeBody": false
  }
]

I want to replace the "Items": in the org json trying this:

export updatedCloudFrontConf=$(echo $json | jq '.DistributionConfig.DefaultCacheBehavior.LambdaFunctionAssociations.Items='$lambdaFunctionAssociations'')

with thefollowing error:

jq: error: syntax error, unexpected $end (Unix shell quoting issues?) at <top-level>, line 1:
.DistributionConfig.DefaultCacheBehavior.LambdaFunctionAssociations.Items=[

oguz ismail · Accepted Answer · 2019-12-16 15:21:49Z

3

Not to diminish your efforts at all, but that's not how we use jq. You can do this in a single call, e.g:

jq --arg originResponse ZZZ --arg viewerRequest YYY --arg originRequest XXX '
.DistributionConfig.DefaultCacheBehavior.LambdaFunctionAssociations.Items |= map(
  .EventType as $t | .LambdaFunctionARN =
    if $t == "origin-response" then $originResponse
    elif $t == "viewer-request" then $viewerRequest
    elif $t == "origin-request" then $originRequest
    else . end
)' file

answered Dec 16, 2019 at 15:21

oguz ismail

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