[bug#42049] [PATCH 0/4] build-system/cargo: Propagations across the crate closure.

[Jakub Kądziołka]

Due to the unusual (for Guix) compilation model used by
cargo-build-system, any phases or inputs added by a given library crate
need to be duplicated in all its dependents. This patchstack attempts to
solve this by allowing to propagate inputs, native-inputs and phases
across cargo-inputs edges in the dependency graph.

Apart from the build system work itself, I have included samples of the
cleanup they allow. Apart from being a good example, these are the
changes I have used to test the feature.

Jakub Kądziołka (4):
  build-system/cargo: Allow propagating inputs across CARGO-INPUTS edges
  gnu: crates-io: Use propagated-inputs and propagated-native-inputs.
  build-system/cargo: Add a propagated-phases argument.
  gnu: crates-io: Use propagated-phases.

 gnu/packages/crates-io.scm  | 157 +++++++++++-------------------------
 gnu/packages/rust-apps.scm  |   9 +--
 gnu/packages/sequoia.scm    |   3 +-
 guix/build-system/cargo.scm |  92 +++++++++++++++------
 4 files changed, 120 insertions(+), 141 deletions(-)

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2.26.2