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add back page about auto reloading

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For folks finding this page via search engines, there was still info
regarding listenfd and systemfd which is no longer recommended.
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Rob Ede 2020-11-24 21:07:20 +00:00
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---
title: Autoreloading
menu: docs_patterns
weight: 1000
---
# Auto-Reloading Development Server
During development it can be very handy to have cargo automatically recompile the code on change.
This can be accomplished very easily by using [cargo-watch][cargowatch].
```sh
cargo watch -x 'run --bin app'
```
## Historical Note
An old version of this page recommended using a combination of systemfd and listenfd, but this has
many gotchas and was difficult to integrate properly, especially when part of a broader development
workflow. We consider [`cargo-watch`] to be sufficient for auto-reloading purposes.
[`cargo-watch`]: https://github.com/passcod/cargo-watch