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CONTRIBUTING.md

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Contributing

Updating libgit2

The following steps can be used to update libgit2:

  1. Update the submodule. There are several ways to go about this. One way is to go to the libgit2-sys/libgit2 directory and run git fetch origin to download the latest updates, and then check out a specific tag (such as git checkout v1.4.1).

  2. Update all the references to the version:

    • Update libgit2-sys/build.rs. There is a version probe (search for cfg.atleast_version) which should be updated.
    • Update the version in libgit2-sys/Cargo.toml. Update the metadata portion (the part after the +) to match libgit2. Also bump the Cargo version (the part before the +), keeping in mind if this will be a SemVer breaking change or not.
    • Update the dependency version in Cargo.toml to match the version in the last step (do not include the + metadata). Also update the version of the git2 crate itself so it will pick up the change to libgit2-sys (also keeping in mind if it is a SemVer breaking release).
    • Update the version in README.md if needed.
    • If there was a SemVer-breaking version bump for either library, also update the html_root_url attribute in the lib.rs of each library.
  3. Run tests. cargo test -p git2 -p git2-curl is a good starting point.

  4. Run systest. This will validate for any C-level API problems. Unfortunately systest does not work on nightly, so you'll need to use stable.

    cargo +stable run -p systest

    The changelog at https://github.com/libgit2/libgit2/blob/main/docs/changelog.md can be helpful for seeing what has changed. The project has recently started labeling API and ABI breaking changes with labels: https://github.com/libgit2/libgit2/pulls?q=is%3Apr+label%3A%22api+breaking%22%2C%22abi+breaking%22+is%3Aclosed

  5. Once you have everything functional, publish a PR with the updates.