feat(cli/watch): reload on .env changes with --env-file

[edilson258]

Closes #29483

This PR enables Deno to watch the env files when using --watch with --env-file flags. Now, changes to environment variables in the .env (or in any other file provided as env file) will trigger a reload, ensuring scripts always use the latest values without needing a manual restart.

[bartlomieju]

Thanks for the PR @edilson258, any chance you could a test to that exercises this change?

[edilson258]

Thanks for the PR @edilson258, any chance you could a test to that exercises this change?

Where exactly i should put such test? and Is there any other similar test that i can use as base?

[bartlomieju]

@edilson258 ooops, I forgot to mention to add it to tests/integration/watcher_tests.rs

[edilson258]

There is a problem with this patch, now we recognize changes in env files and reload when they happen but the env values does not get updated.

Does anyone knows how to solve this?

CC: @bartlomieju, @littledivy

[bartlomieju]

@edilson258 you need to call load_env_variables_from_env_file after the watcher restarts because of change in the env file

[edilson258]

@edilson258 you need to call load_env_variables_from_env_file after the watcher restarts because of change in the env file

does not work

[edilson258]

@edilson258 you need to call load_env_variables_from_env_file after the watcher restarts because of change in the env file

Maybe when using load_env_variables_from_env_file the env values are updated in rust land and those updates never reflect in JavaScript side!
That may be the case if the Deno.env makes some sort of caching.