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d7363a53d3
Circular dependencies are problematic in several ways: - They result in cognitive overhead for developers, in trying to figure out what depends on what. - They present `cargo` with limits in what order the crates can be compiled in. - They invalidate build caches unnecessarily thus forcing `cargo` to rebuild certain crates. - They cause problems with tooling such as `release-please`. To actually break the circular dependencies, this patch inlines the uses of `development_transport` in the examples and tests for all sub-crates. This is only meant to be a short-term fix until https://github.com/libp2p/rust-libp2p/issues/3111 and https://github.com/libp2p/rust-libp2p/pull/2888 are fixed. To ensure we don't accidentally reintroduce this dependency, we add a basic CI that queries `cargo metadata` using `jq`. Resolves https://github.com/libp2p/rust-libp2p/issues/3053. Fixes https://github.com/libp2p/rust-libp2p/issues/3223. Related: https://github.com/libp2p/rust-libp2p/pull/2918#discussion_r976514245 Related: https://github.com/googleapis/release-please/issues/1662