Module dev 

cargo kick dev — watch the project’s source tree and restart the app on save.

Thin wrapper over cargo run. On each batch of debounced file events under src/ (or any user-supplied path), we kill the current child and the entire process tree it spawned and respawn cargo run. stdout/stderr from the child stream through to the user’s terminal so compile errors and runtime logs land as they would for a manual cargo run.

Process-tree cleanup: cargo run itself spawns the built binary. Without explicit tree termination, killing cargo leaves the app running (and the port bound) across the restart. We work around that by:

• Spawning cargo in its own process group (Unix setpgid / Windows CREATE_NEW_PROCESS_GROUP).
• On kill, sending the signal to the whole group: kill -KILL -<pgid> on Unix, taskkill /F /T /PID on Windows.

Result: restart releases the port immediately on both platforms.

Structs

DevArgs

Decoded form of the dev subcommand.

Enums

DevError

Functions

run

Run the dev loop. Returns only when the user Ctrl-C’s the parent process — the watcher otherwise loops forever.