How can I modify part of an URI in a YAML file using yq?

[pauloomarcelo]

I need to update parts of a YAML file, let's say I have this YAML:

transformations:
template: "/pix-bacen/api/v2/pix/
- match_rule: "^/pxxxx/xx/x
template: "/pix-bacen/api/v2/pix/
- match_rule: "^/pxxxx/xx/xxxx
template: "/pix-bacssss/api/v2/pix/
- match_rule: "^/pxxx/xxx/xx

If I want to change just the "/pix-bacen/" part to "/pix-bacen-NEW/", without changing anything else, how should I act? I've tried to use the "with" operator and the "-i" but I just could not figure it out

[shakibamoshiri]

You have to ways

First using -i in-place update flag

Second by making a tmp file and then overwrite the original one

You yaml does not seem to well-formatted , please update your sample so can be tested

sample input

transformations:
  - template: /pix-bacen/api/v2/pix/
  - template: /pix-bacen/api/v2/pix/
  - template: /pix-bacssss/api/v2/pix/

Les update the first index [0]

yq '.transformations[0].template = "xyz"' file.yaml

sample output

transformations:
  - template: xyz
  - template: /pix-bacen/api/v2/pix/
  - template: /pix-bacssss/api/v2/pix

after testing and seeing the output was correct then you can use -i flag or make a new file then swap them