Sort through a json response in bash-CodePudding

I'm having trouble doing a seemingly trivial task. Say I've got an API response with a following json output:

    [
  {
    "id": 47,
    "iid": 12,
    "project_id": 1,
    "status": "pending",
    "soure": "push",
    "ref": "new-pipeline",
    "sha": "a91957a858320c0e17f3a0eca7cfacbff50ea29a",
    "web_url": "https://example.com/foo/bar/pipelines/47",
    "created_at": "2016-08-11T11:28:34.085Z",
    "updated_at": "2016-08-11T11:32:35.169Z"
  },
  {
    "id": 48,
    "iid": 13,
    "project_id": 1,
    "status": "pending",
    "soure": "web",
    "ref": "new-pipeline",
    "sha": "eb94b618fb5865b26e80fdd8ae531b7a63ad851a",
    "web_url": "https://example.com/foo/bar/pipelines/48",
    "created_at": "2016-08-12T10:06:04.561Z",
    "updated_at": "2016-08-12T10:09:56.223Z"
  }
]

I want to keep only those objects whose 'created_at' date matches current date. What would be the best way/tools for this job?

CodePudding user response：

This is a job for jq

# `printf` can do strftime stuff
today=$(printf '%(%Y-%m-%d)T' -1)   # magic value "-1" is "now"

echo "$response" | jq --arg date "$today" '[.[] | select(.created_at | startswith($date))]'

Or, all in jq

echo "$response" | jq '
    (now | strftime("%F")) as $today |
    [.[] | select(.created_at | startswith($today))]
'

CodePudding user response：

With the JSON parser xidel you could either do a string comparison, checking whether created_at starts with the current date as a string:

$ xidel -s input.json -e '$json()[starts-with(created_at,"'$(date ' %Y-%m-%d')'")]'
$ xidel -s input.json -e '$json()[starts-with(created_at,substring(current-date(),1,10))]'
$ xidel -s input.json -e '$json()[starts-with(created_at,format-date(current-date(),"[Y]-[M01]-[D01]"))]'

Or you could do a logical date comparison:

$ xidel -s input.json -e '$json()[date(substring-before(created_at,"T")) eq current-date()]'