Option to ignoreKeys

[aznamier]

Allows excluding keys from sorting, eg. when we need to maintain the visual order for certain keys

[MrHus]

Can you elaborate a little more on the use case for this PR with an example?

[aznamier]

Actually, realised that my initial strict use case would not be really useful for general cases. However i just slightly modified that pull request into more useful:

In docker compose:

version: '2'
services:
  other:
    hostname: other
    image: some/image
    labels:
      io.system.global.enabled: false
      io.rancher.scheduler.affinity:host_label: zone=private,core=true,cpu=true
      io.rancher.service.external_dns: never
      io.zeta.service.pattern: MMMS
  blah:
    hostname: blah
    image: some/image
    labels:
      io.system.global.enabled: false
      io.rancher.scheduler.affinity:host_label: zone=private,core=true,cpu=true
      io.rancher.service.external_dns: never
      io.zeta.service.pattern: MMMS

With new modification: node index.js --input docker-compose.yml --output sorted.yml --ik version io.

We are able to keep certain things in place which makes it easier to read/compare eg :

• version - stays at the top
• labels: io* eg: io.system.global.enabled etc are kept unsorted

version: '2'
services:
  blah:
    hostname: blah
    image: some/image
    labels:
      io.system.global.enabled: false
      'io.rancher.scheduler.affinity:host_label': 'zone=private,core=true,cpu=true'
      io.rancher.service.external_dns: never
      io.zeta.service.pattern: MMMS
  other:
    hostname: other
    image: some/image
    labels:
      io.system.global.enabled: false
      'io.rancher.scheduler.affinity:host_label': 'zone=private,core=true,cpu=true'
      io.rancher.service.external_dns: never
      io.zeta.service.pattern: MMMS