Trait watchexec::run::Handler[−][src]

pub trait Handler {
    fn on_manual(&self) -> Result<bool>;

    fn on_update(&self, ops: &[PathOp]) -> Result<bool>;

    fn args(&self) -> Config;
}

Required methods

Called through a manual request, such as an initial run.

Returns

A Result which means:

  • Err: an error has occurred while processing, quit.
  • Ok(true): everything is fine and the loop can continue.
  • Ok(false): everything is fine but we should gracefully stop.

Called through a file-update request.

Parameters

  • ops: The list of events that triggered this update.

Returns

A Result which means:

  • Err: an error has occurred while processing, quit.
  • Ok(true): everything is fine and the loop can continue.
  • Ok(false): everything is fine but we should gracefully stop.

Called once by watch at the very start.

Not called again; any changes will never be picked up.

The Config instance should be created using ConfigBuilder rather than direct initialisation to resist potential breaking changes (see semver policy on crate root).

Implementors