How to retreive key value from JQ via bash script

Question

I am trying to retrieve a key value from aws cli response via jq in shell script however not getting the intended response.

could you please help figure how to retrieve the desired key in below condition

resource=aws lambda add-permission --function-name $functionName --statement-id "testing" --action "lambda:InvokeFunction" --principal "events.amazonaws.com" --source-arn $rulearn
echo ${resource} | jq ".[]"

this return me a response like

 {\"Sid\":\"xxxxxxxx\",\"Effect\":\"Allow\",\"Principal\":{\"Service\":\"events.amazonaws.com\"},\"Action\":\"lambda:InvokeFunction\",\"Resource\":\"arn:aws:lambda:us-west-2:xxxxxxxx:function:xxxxxx\",\"Condition\":{\"ArnLike\":{\"AWS:SourceArn\":\"arn:aws:events:us-west-2:xxxxxx:rule/xxxxx\"}}}"

I am trying to get value of resource using below line

   echo ${resource} | jq ".[]" | jq ".Resource"  

however response is coming back as

[
  133
]

What should be the correct way to retrieve value of key resource.

Answer 1

I made it work like below:-

Made resource outputted in text format

resource=$(aws lambda add-permission --function-name $functionName --statement-id "xxxxxx" --action "lambda:InvokeFunction" --principal "events.amazonaws.com" --source-arn $rulearn --query 'Statement' --output text )

and then converted it to json using below and then retreived resource

resource=$(echo ${resource} | jq "." | jq ".Resource" | sed "s|\"||g")

Answer 2

The JSON included in the question is a JSON string (except that the initial double-quote is missing). To convert it into a JSON object, you can use the fromjson filter, so you would write:

 jq 'fromjson|.Resource' 

With the given JSON string (with the initial double-quote) as input, this produces:

"arn:aws:lambda:us-west-2:xxxxxxxx:function:xxxxxx"

Answer 3

The Resource field seems to be in the root object so running echo ${resource} | jq ".Resource" should do the trick