今天看到这个crate想起很久之前我也给golang做过一个类似的库😄

hook panic的

用法也很简单：

  1. cargo add human-panic
  1. [dependencies]
  2. human-panic = "1.0.3"
  1. use human_panic::setup_panic;
  3. fn main() {
  4.    setup_panic!();
  6.    println!("A normal log message");
  7.    panic!("OMG EVERYTHING IS ON FIRE!!!")
  8. }

看看啥原理？

点进setup_panic!宏看看。

  1.      #[allow(unused_imports)]
  2.     use std::panic::{self, PanicInfo};
  3.     #[allow(unused_imports)]
  4.     use $crate::{handle_dump, print_msg, Metadata};
  6.     #[cfg(not(debug_assertions))]
  7.     match ::std::env::var("RUST_BACKTRACE") {
  8.       Err(_) => {
  9.         let meta = Metadata {
  10.           version: env!("CARGO_PKG_VERSION").into(),
  11.           name: env!("CARGO_PKG_NAME").into(),
  12.           authors: env!("CARGO_PKG_AUTHORS").replace(":", ", ").into(),
  13.           homepage: env!("CARGO_PKG_HOMEPAGE").into(),
  14.         };
  16.         panic::set_hook(Box::new(move |info: &PanicInfo| {
  17.           let file_path = handle_dump(&meta, info);
  18.           print_msg(file_path, &meta)
  19.             .expect("human-panic: printing error message to console failed");
  20.         }));
  21.       }
  22.       Ok(_) => {}
  23.     }

原来std标准库本来就支持 hook啊，没什么黑科技😅。那没事了

  1. use std::panic::PanicInfo;
  4. fn main() {
  5.     // setup_panic!();
  7.     std::panic::set_hook(Box::new(move |info: &PanicInfo| {
  8.         println!("this is panic {:?}",info);
  9.     }));
  10.     println!("A normal log message");
  11.     panic!("OMG EVERYTHING IS ON FIRE!!!")
  12. }