Print result of timestamp function one line before string - json

Question

At the bottom is some example json data which I'd like to add timestamps to. i.e "time": "1544785866.176123088" The timestamps need to be unique on each iteration and need to occur on the line above "bladesetName". Unfortunately, what I have so far is not working. After printing the time to the file in the needed places I was going to add 1ns to each entry. Is there a better way of doing this?
timestamp() {
date +%s.%N
}
awk "/bladesetName/{ print '"time" "$(timestamp)"' }1" volumes3.json
This throws an error
awk: /bladesetName/{ print 'time 1544786158.644385726' }1
awk: ^ invalid char ''' in expression
.
{
"pasxml": {
"#version": "6.0.0",
"system": {
"name": "example1",
"IPV4": "0.0.0.0",
"alertLevel": "critical",
"state": "online"
},
"volumes": {
"volume": [
{
"#id": "1",
"name": "/",
"bladesetName": {
"#id": "1",
"#text": "Set-1"
},
"state": "Online",
"raid": "Object RAID6+",
"director": "Shelf-001,1",
"volservice": "0x0400000000000004(FM)",
"objectId": "I-xD0200000000000004-xG7ee84b0c-xU00004a75726a656e",
"recoveryPriority": "1",
"efsaMode": "retry",
"spaceUsedGB": "0",
"spaceAvailableGB": "693903.38",
"hardQuotaGB": "0.52",
"softQuotaGB": "0.52",
"userQuotaPolicy": {
"#inherit": "0",
"#text": "disabled"
},
"stats": null
},
{
"#id": "8",
"name": "/datacentre/archvol/pan101",
"bladesetName": {
"#id": "1",
"#text": "Set-1"
},
"alertLevel": "critical",
"state": "Online",
"raid": "Object RAID6+",
"director": "Shelf-008,1",
"volservice": "0x04000000000000ec(FM)",
"objectId": "I-xD02000000000000ec-xG5c7aef6f-xU00004a75726a656e",
"recoveryPriority": "50",
"efsaMode": "retry",
"spaceUsedGB": "117000.09",
"spaceAvailableGB": "693903.38",
"hardQuotaGB": "117000.00",
"softQuotaGB": "90000.00",
"userQuotaPolicy": {
"#inherit": "1",
"#text": "disabled"
},
"stats": null
},

Answer 1

Here’s one approach, which uses jq:
def addnow:
. as $in
| to_entries
| (map(.key)|index("bladesetName")) as $i
| if $i
then .[0:$i]+[{key:"time",value:now}]+.[$i:] | from_entries
else $in
end ;
walk(if type=="object" then addnow else . end)
If you really want the time as a string, simply add tostring, as in (now|tostring)
If your jq does not have walk, then now would be a good time to upgrade; otherwise simply copy and paste its def, which can easily be found on the web, e.g. by googling: jq “def walk”