如何将 txt 转换为 json？

Question

i try use jq convert was successful, but I didn't get the results I wanted. I tried to get the results I wanted, but it's hard.

jq -Rs '[ split("\n")[] | select(length > 0) | split(" ") |  {group:.[0], instnace: .[1], value: .[2]} ]' input.txt

original txt file.. There are IP addresses and values from cpu20 to 46 in total

cpu20 10.0.20.1 12
cpu20 10.0.20.1 22
cpu20 10.0.20.1 13
cpu20 10.0.20.1 11
cpu20 10.0.20.1 14

....~cpu46

It's the result of the way I tried. output json

{
    "group": "cpu-46",
    "instnace": "10.0.46.94",
    "value": "10"
  },
  {
    "group": "cpu-46",
    "instnace": "10.0.46.95",
    "value": "10"
  },
  {
    "group": "cpu-46",
    "instnace": "10.0.46.96",
    "value": "11"
  },
  {
    "group": "cpu-46",
    "instnace": "10.0.46.97",
    "value": "8"
  },
  {
    "group": "cpu-46",
    "instnace": "10.0.46.98",
    "value": "11"
  },
  {
    "group": "cpu-46",
    "instnace": "10.0.46.99",
    "value": "11"
  },
  {
    "group": "cpu-46",
    "instnace": "10.0.46.100",
    "value": "8"
  }

What should I do to get the results as follows?

    {
  "CPU20": [
    { "instance": "10.0.20.1", "value": 12 },
    { "instance": "10.0.20.2", "value": 22 },
    { "instance": "10.0.20.3", "value": 13 },
    { "instance": "10.0.20.4", "value": 11 },
    { "instance": "10.0.20.5", "value": 14 }
  ],
  "CPU21": [
    { "instance": "10.0.21.1", "value": 15 },
    { "instance": "10.0.21.2", "value": 24 },
    { "instance": "10.0.21.3", "value": 21 },
    { "instance": "10.0.21.4", "value": 15 },
    { "instance": "10.0.21.5", "value": 16 }
  ],
  "CPU22": [
    { "instance": "10.0.22.1", "value": 12 },
    { "instance": "10.0.22.2", "value": 18 },
    { "instance": "10.0.22.3", "value": 19 },
    { "instance": "10.0.22.4", "value": 12 },
    { "instance": "10.0.22.5", "value": 13 }
  ],
  "CPU23": [
    { "instance": "10.0.20.1", "value": 17 },
    { "instance": "10.0.20.2", "value": 15 },
    { "instance": "10.0.20.3", "value": 21 },
    { "instance": "10.0.20.4", "value": 22 },
    { "instance": "10.0.20.5", "value": 25 }
  ]
}

Answer 1

Using group_by and map

jq -Rn '
  [inputs | select(. != "") / " "]
  | group_by(.[0])
  | map({(.[0][0]): map({instance: .[1], value: .[2]})})
  | add
'

Demo

Using reduce

jq -Rn '
  [inputs | select(. != "") / " "]
  | reduce .[] as [$cpu, $instance, $value] ({};
      .[$cpu] += [{$instance, $value}]
    )
'

Demo

Answer 2

A scripting language like ruby would work here as well:

ruby -rjson -e '
  data = Hash.new {|h, k| h[k] = []}
  File.new(ARGV.shift).each {|line|
    cpu, ip, num = line.split
    data[cpu] << {instance: ip, value: num.to_i}
  }
  puts JSON.dump(data)
' input.txt

{"CPU20":[{"instance":"10.0.20.1","value":12},{"instance":"10.0.20.2","value":22},{"instance":"10.0.20.3","value":13},{"instance":"10.0.20.4","value":11},{"instance":"10.0.20.5","value":14}],"CPU21":[{"instance":"10.0.21.1","value":15},{"instance":"10.0.21.2","value":24},{"instance":"10.0.21.3","value":21},{"instance":"10.0.21.4","value":15},{"instance":"10.0.21.5","value":16}],"CPU22":[{"instance":"10.0.22.1","value":12},{"instance":"10.0.22.2","value":18},{"instance":"10.0.22.3","value":19},{"instance":"10.0.22.4","value":12},{"instance":"10.0.22.5","value":13}],"CPU23":[{"instance":"10.0.20.1","value":17},{"instance":"10.0.20.2","value":15},{"instance":"10.0.20.3","value":21},{"instance":"10.0.20.4","value":22},{"instance":"10.0.20.5","value":25}]}