jq 解析 json 并生成 json output

Question

I'm working on finding a solution where I need to parse a json file (input.json) and create json file as output (output.json) after removing few lines.

Only few version will have both value (ubuntu, centos), most of the version will have either ubuntu or centos.

I tried the following command;

jq '.[]' input.json

it gives the complete list But don't know how to get values under ubuntu and centos. any guidance will be beneficial.

input.json

[
  {
    "Version": "1.0",
    "ubuntu": {
      "ver": "1.0.0",
      "filename": "1_0_0.log",
      "sourceUrl": "https://example.com/log/1_0_0.log"
    }
  },
  {
    "Version": "1.1",
    "ubuntu": {
      "ver": "1.0.1",
      "filename": "1_0_1.log",
      "sourceUrl": "https://example.com/log/1_0_1.log"
    }
  },
  {
    "Version": "1.4",
    "ubuntu": {
      "ver": "1.0.4",
      "filename": "1_0_4.log",
      "sourceUrl": "https://example.com/log/1_0_4.log"
    },
    "centos": {
      "ver": "1.0.4",
      "filename": "1_0_4.pdf",
      "sourceUrl": "https://example.com/log/1_0_4.pdf"
    }
  }
]

output.json

[
  {
    "Version": "1.0",
    "ubuntu": {
      "ver": "1.0.0",
      "filename": "1_0_0.log"
    }
  },
  {
    "Version": "1.1",
    "ubuntu": {
      "ver": "1.0.1",
      "filename": "1_0_1.log"
    }
  },
  {
    "Version": "1.4",
    "ubuntu": {
      "ver": "1.0.4",
      "filename": "1_0_4.log"
    },
    "centos": {
      "ver": "1.0.14",
      "filename": "1_0_4.pdf"
    }
  }
]

Answer 1

You can use the following JQ command to remove each sourceUrl ;

jq 'del(.. | .sourceUrl?)' input.json

del() docs

---

Output:

[
  {
    "Version": "1.0",
    "ubuntu": {
      "version": "1.0.0",
      "filename": "1_0_0.log"
    }
  },
  {
    "Version": "1.1",
    "ubuntu": {
      "version": "1.0.1",
      "filename": "1_0_1.log"
    }
  },
  {
    "Version": "1.4",
    "ubuntu": {
      "version": "1.0.4",
      "filename": "1_0_4.log"
    },
    "centos": {
      "version": "1.0.4",
      "filename": "1_0_4.pdf"
    }
  }
]

Try it online!