How to enable Run on save?

[hichemfantar]

Clicking the built-in Run button doesn't rerun when saving files.

I have to use:
cargo watch -x 'run main.rs'

[lnicola]

Indeed, the Run lens isn't going to re-run the program after each save.

For programs that finish (so not Web servers) you can get an approximation of it by setting "rust-analyzer.check.command": "run", but you're not going to see the terminal output. I suggest continuing to use cargo watch.