watchexec/lib/src/lib.rs

105 lines
3.6 KiB
Rust

//! Watchexec: a library for utilities and programs which respond to events;
//! file changes, human interaction, and more.
//!
//! Also see the CLI tool: <https://watchexec.github.io/>
//!
//! This library is powered by [Tokio](https://tokio.rs), minimum version 1.10. This requirement may
//! change (upwards) in the future without breaking change.
//!
//! The main way to use this crate involves constructing a [`Watchexec`] around an
//! [`InitConfig`][config::InitConfig] and a [`RuntimeConfig`][config::RuntimeConfig], then running
//! it. [`Handler`][handler::Handler]s are used to hook into watchexec at various points. The
//! runtime config can be changed at any time with the [`Watchexec::reconfigure()`] method.
//!
//! ```no_run
//! # use color_eyre::eyre::Report;
//! # use std::convert::Infallible;
//! use watchexec::{
//! Watchexec,
//! action::{Action, Outcome},
//! config::{InitConfig, RuntimeConfig},
//! handler::{Handler as _, PrintDebug},
//! };
//!
//! #[tokio::main]
//! async fn main() -> Result<(), Report> {
//! let mut init = InitConfig::builder();
//! init.on_error(PrintDebug(std::io::stderr()));
//!
//! let mut runtime = RuntimeConfig::default();
//! runtime.pathset(["watchexec.conf"]);
//!
//! let conf = YourConfigFormat::load_from_file("watchexec.conf").await?;
//! conf.apply(&mut runtime);
//!
//! let we = Watchexec::new(init.build().unwrap(), runtime.clone())?;
//! let w = we.clone();
//!
//! let c = runtime.clone();
//! runtime.on_action(move |action: Action| {
//! let mut c = c.clone();
//! let w = w.clone();
//! async move {
//! for event in &action.events {
//! if event.paths().any(|p| p.ends_with("/watchexec.conf")) {
//! let conf = YourConfigFormat::load_from_file("watchexec.conf").await?;
//!
//! conf.apply(&mut c);
//! w.reconfigure(c.clone());
//! // tada! self-reconfiguring watchexec on config file change!
//!
//! break;
//! }
//! }
//!
//! action.outcome(Outcome::if_running(
//! Outcome::DoNothing,
//! Outcome::both(Outcome::Clear, Outcome::Start),
//! ));
//!
//! Ok(())
//! # as Result<_, Infallible>
//! }
//! });
//!
//! we.main().await?;
//! Ok(())
//! }
//! # struct YourConfigFormat;
//! # impl YourConfigFormat {
//! # async fn load_from_file(_: &str) -> Result<Self, Infallible> { Ok::<_, Infallible>(Self) }
//! # fn apply(&self, _: &mut RuntimeConfig) { }
//! # }
//! ```
//!
//! Alternatively, one can use the modules exposed by the crate and the external crates such as
//! [ClearScreen][clearscreen] and [Command Group][command_group] to build something more advanced,
//! at the cost of reimplementing the glue code. See the examples folder for some basic/demo tools
//! written with the individual modules.
//!
//! This crate does not itself use `unsafe`. However, it depends on a number of libraries which do,
//! most because they interact with the operating system.
#![doc(html_favicon_url = "https://watchexec.github.io/logo:watchexec.svg")]
#![doc(html_logo_url = "https://watchexec.github.io/logo:watchexec.svg")]
#![warn(clippy::unwrap_used)]
#![forbid(unsafe_code)]
// the toolkit to make your own
pub mod action;
pub mod command;
pub mod error;
pub mod event;
pub mod fs;
pub mod signal;
// the core experience
pub mod config;
pub mod handler;
mod watchexec;
#[doc(inline)]
pub use crate::watchexec::Watchexec;
// the *action* is debounced, not the events