How to pass process.env variable?

[PollySt]

Hello!
I've looked into your documentation of environment variables, and as I understood, I can pass them like this "url": "{TEAMS_URL}" in the config file, but it doesn't work for me.
This is my config file:

{
  "targets": [
    {
      "name": "slack",
      "inputs": {
        "url": "{SLACK_TESTS_STAGING_URL}",
        "publish": "test-summary",
        "title": "Test Results - Mobile (Device: {DEVICE})"
      },
      "extensions": [
        {
          "name": "ci-info",
          "inputs": {
            "show_repository": false
          }
        },
        {
          "name": "quick-chart-test-summary"
        }
      ]
    }
  ],
  "results": [
    {
      "type": "junit",
      "files": [
        "junit-results-staging.xml"
      ]
    }
  ]
}

I assign a value to the variable during the test run: process.env.DEVICE = String(randomDevice)
But in the report, I get this:

Using "title": "Test Results - Mobile (Device: {process.env.DEVICE})" also gives a string Mobile (Device: process.env.DEVICE).

Can you help me please? What am I doing wrong?
Thanks!
@ASaiAnudeep

[ASaiAnudeep]

Try storing the DEVICE environment variable in a .env file for better accessibility across steps.

require('fs').writeFileSync('.env', `DEVICE=${randomDevice}`);

[PollySt]

With writeFileSync, the whole .env file will be overwritten. With appendFileSync a lot of DEVICE variables will be added each time. Is there a way to avoid this?

[ASaiAnudeep]

I assume, if you are running in CI, it will be appended only once. If not, may be you can read the entire file and replace the appropriate device name in the .env file.