cargo-cacher is a caching server in the same spirit as apt-cacher-ng. The goal is to allow recursive caching of the canonical crates.io index.
To configure your system to use a copy of cargo-cacher, you need to setup a .cargo/config file in your project, or in a containing folder. The contents of that folder should look like:
```toml [source]
[source.mirror] registry = "file:///configured/path/to/index"
[source.crates-io] replace-with = "mirror" registry = "https://doesnt-matter-but-must-be-present" ```
Once this is in place, your builds will go through the local proxy, and the crates will be pulled down to the local filesystem when they are first requested.