[birktj]

You can view the source of a crate on docs.rs (see [1] for the Cargo.toml of rust-s3). Also I am pretty sure cargo only depends on GitHub for authentication for uploading crates and not for the actual contents. Trying to build an empty crate with rust-s3 as a dependency right now seems to work fine.

[1]: https://docs.rs/crate/rust-s3/0.28.0/source/Cargo.toml

[ATsch]

As I understand it, the crates themselves are not stored on github, but the crate index is, as it uses a git repo to get "free" delta compression and auditing.