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Publishing new versions of uefi-rs to Crates.io

This guide documents the best practices for publishing new versions of the crates in this repository to crates.io.

It is mostly intended for maintainers of the uefi-rs project.

Bumping the crate versions

For ensuring compatibility within the crates ecosystem, Cargo recommends maintainers to follow the semantic versioning guidelines.

This means that before publishing the changes, we need to decide which crates were modified and how should their version numbers be incremented.

Incrementing the version number of a crate is as simple as editing the corresponding Cargo.toml file and updating the version = ... line, then commiting the change (preferrably on a new branch, so that all of the version bumps can be combined in a single pull request).

Crate dependencies

The dependency graph of the published crates in this repo is:

  • uefi-services depends on uefi (the root project)
  • uefi depends on uefi-macros

If there are breaking changes happening in the project, we should first publish a new version of uefi-macros, then of uefi, then of uefi-services and so on.

For example, if the signature of a widely-used macro from uefi-macros is changed, a new major version of that crate will have to be published, then a new version of uefi (major if the previous bump caused changes in the public API of this crate as well), then possibly a new version of uefi-services.

Furthermore, uefi-macros has the uefi crate as a dev-dependency, and that will have to be updated in tandem with the major versions of the core crate.

Updating the dependent crates

Remember that if a new major version of a crate gets released, when bumping the version of it's dependents you will have to also change the dependency line for it.

For example, if uefi-macros gets bumped from 1.1.0 to 2.0.0, you will also have to update the corresponding Cargo.toml of uefi to be:

uefi-macros = "2.0.0"

The dependencies in template/Cargo.toml should also be updated to the new version.

Publishing new versions of the crates

This section is mostly a summary of the official guide to publishing on crates.io, with a few remarks regarding the specific of this project.

Start by following the steps in the guide. When running cargo publish, you will have to use a custom --target flag to be able to build/verify the crates:

cargo publish --target x86_64-unknown-uefi

Updating the changelog

After bumping the crate versions, we should also update the CHANGELOG.md file in order to move all of the unpublished changes to their respective version, and prepare it for tracking further changes.