gron.awk

Similar to tomnomnom/gron but in Awk.

Features true JSON parser in pure Awk.

Reasonably fast with Gawk/Mawk/GoAWK even on large-ish files. Slow with BWK on big JSON files (100K+).

Developed in xonixx/intellij-awk. Incubated from xonixx/awk_lab.

Usage

Gron:

$ echo '{"a":[1,2,3]}' | ./gron.awk
json={}
json.a=[]
json.a[0]=1
json.a[1]=2
json.a[2]=3

Un-Gron:

$ echo '{"a":[1,2,3]}' | ./gron.awk | ./gron.awk - -u
{
  "a": [
    1,
    2,
    3
  ]
}

Filter part of JSON:

$ curl -s "https://api.github.com/repos/xonixx/gron.awk/commits?per_page=1" \
     | ./gron.awk | grep "commit.author" | ./gron.awk - -u
[
  {
    "commit": {
      "author": {
        "date": "2021-10-19T11:31:34Z",
        "email": "xonixx@gmail.com",
        "name": "xonix"
      }
    }
  }
]

JSON structure:

$ curl -s 'https://ip-ranges.amazonaws.com/ip-ranges.json' | ./gron.awk - -s
.syncToken = "1634535194"
.createDate = "2021-10-18-05-33-14"
.prefixes[].ip_prefix = "3.5.140.0/22"
.prefixes[].region = "ap-northeast-2"
.prefixes[].service = "AMAZON"
.prefixes[].network_border_group = "ap-northeast-2"
.ipv6_prefixes[].ipv6_prefix = "2a05:d07a:a000::/40"
.ipv6_prefixes[].region = "eu-south-1"
.ipv6_prefixes[].service = "AMAZON"
.ipv6_prefixes[].network_border_group = "eu-south-1"