I’m currently working on a GitLab CI/CD pipeline and I’m trying to use the sed command to dynamically update the contents of a file while the pipeline is running. My goal is to replace a placeholder version in a json file with a dynamic value that changes based on the pipeline execution context. I wrote a command in the .gitlab-ci.yml file, but I don’t know if my syntax is correct or if there is a better way.

My questions are:
Is the syntax of my sed command correct for use in a GitLab CI pipeline?
Is there a more efficient or recommended way to perform text replacement in files within a GitLab CI pipeline?

build:
  image: node:alpine
  services:
    - docker:dind
  variables:
    VARIABLE: changed
  before_script:
    - [commands]
    - [commands]
    - [commands]
    - |
      sed -i 's/"version": "[^"]*"/"version": "'"$VARIABLE"'"/' app.json
  script:
    - cat app.json

This commands work on the runner :

$ sed -i 's/"version": "[^"]*"/"version": "'"$variable"'"/' app.json
$ cat app.json
{
    "something": {
      "version": "changed"
    }
}