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Allow overriding crate universe packages to local packages #2674

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ograff
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@ograff ograff commented Jun 2, 2024

Allow external crates to be aliased to local targets

In some cases it may be desirable to alias a public crate to a locally
define rust_library target, even for dependencies of crates that are not
being overriden.
Support this use case by swapping out alias for rust_library when
a user overrides the target using an annotation.

@ograff ograff force-pushed the allow_overriding_crate_universe_packages_to_local_packages branch from 57fa7fa to e2fa65d Compare June 3, 2024 20:08
ograff added 3 commits June 3, 2024 13:10
In some cases it may be desirable to alias a public crate to a locally
define rust_library target, even for dependencies of crates that are not
being overriden.

Support this use case by swapping out `alias` for `rust_library` when
a user overrides the target using an annotation.
@ograff ograff force-pushed the allow_overriding_crate_universe_packages_to_local_packages branch from e2fa65d to 42e4639 Compare June 3, 2024 20:13
@illicitonion
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LGTM! I made a PR with one suggested modification in ograff#1 - PTAL and merge into this branch or discuss, and I'm happy to merge this :) Thanks!

@ograff
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ograff commented Jun 6, 2024

@illicitonion that change looks great, I went ahead and merged it in.

Is your preference for me to squash all these commits to one pre-merge or leave the history as is?

@illicitonion
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We auto-squash on merge, so don't worry about it, GitHub will deal with it for us! Thanks!

@illicitonion illicitonion enabled auto-merge June 6, 2024 16:45
@illicitonion illicitonion added this pull request to the merge queue Jun 6, 2024
Merged via the queue into bazelbuild:main with commit 33f93ac Jun 6, 2024
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github-merge-queue bot pushed a commit that referenced this pull request Jun 10, 2024
The ability to override crate targets when using crate_universe was
added here: #2674

However, this change did not expose that functionality when using
bzlmod.

This change adds that functionality in. Because of the limited set of
options we have for dictionaries in tag classes, I had to split out
"override_targets" into four different options, each taking a Label.

I have added in an example based on the example given in #2674 , but
using bzlmod instead. I have also tested that example and found it to be
working.
rrbutani referenced this pull request in bazel-contrib/toolchains_llvm Jun 10, 2024
[![Mend
Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| rules_rust | bazel_dep | minor | `0.45.1` -> `0.46.0` |
| [rules_rust](https://togithub.com/bazelbuild/rules_rust) |
http_archive | minor | `0.45.1` -> `0.46.0` |

---

### Release Notes

<details>
<summary>bazelbuild/rules_rust (rules_rust)</summary>

###
[`v0.46.0`](https://togithub.com/bazelbuild/rules_rust/releases/tag/0.46.0)

[Compare
Source](https://togithub.com/bazelbuild/rules_rust/compare/0.45.1...0.46.0)

##### 0.46.0

```python
load("@&#8203;bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
http_archive(
    name = "rules_rust",
    integrity = "sha256-F8U7+AC5MvMtPKGdLLnorVM84cDXKfDRgwd7/dq3rUY=",
    urls = ["https://github.com/bazelbuild/rules_rust/releases/download/0.46.0/rules_rust-v0.46.0.tar.gz"],
)
```

Additional documentation can be found at:
https://bazelbuild.github.io/rules_rust/#setup

##### What's Changed

- fix: default rustfmt version to supplied rust version by
[@&#8203;mattem](https://togithub.com/mattem) in
[https://github.com/bazelbuild/rules_rust/pull/2660](https://togithub.com/bazelbuild/rules_rust/pull/2660)
- Use repo-mapping-aware runfiles API in rust-analyzer by
[@&#8203;dzbarsky](https://togithub.com/dzbarsky) in
[https://github.com/bazelbuild/rules_rust/pull/2666](https://togithub.com/bazelbuild/rules_rust/pull/2666)
- Fix protobuf generated srcs to include all sources by
[@&#8203;matts1](https://togithub.com/matts1) in
[https://github.com/bazelbuild/rules_rust/pull/2676](https://togithub.com/bazelbuild/rules_rust/pull/2676)
- Fix cargo_build_script executables. by
[@&#8203;matts1](https://togithub.com/matts1) in
[https://github.com/bazelbuild/rules_rust/pull/2675](https://togithub.com/bazelbuild/rules_rust/pull/2675)
- crate_universe: Don't include crate name in build script path. by
[@&#8203;criemen](https://togithub.com/criemen) in
[https://github.com/bazelbuild/rules_rust/pull/2663](https://togithub.com/bazelbuild/rules_rust/pull/2663)
- Ensure dynamic library dependencies end up in the runfiles directory
by [@&#8203;EdSchouten](https://togithub.com/EdSchouten) in
[https://github.com/bazelbuild/rules_rust/pull/2671](https://togithub.com/bazelbuild/rules_rust/pull/2671)
- use bazel_ci_rules bazel_dep instead of http_archive by
[@&#8203;mmorel-35](https://togithub.com/mmorel-35) in
[https://github.com/bazelbuild/rules_rust/pull/2678](https://togithub.com/bazelbuild/rules_rust/pull/2678)
- Ensure that running `bazel build` on a cargo_build_script target
actually runs the build script by
[@&#8203;matts1](https://togithub.com/matts1) in
[https://github.com/bazelbuild/rules_rust/pull/2680](https://togithub.com/bazelbuild/rules_rust/pull/2680)
- Allow overriding crate universe packages to local packages by
[@&#8203;ograff](https://togithub.com/ograff) in
[https://github.com/bazelbuild/rules_rust/pull/2674](https://togithub.com/bazelbuild/rules_rust/pull/2674)
- Depend on a copy of rustfmt for the target by
[@&#8203;EdSchouten](https://togithub.com/EdSchouten) in
[https://github.com/bazelbuild/rules_rust/pull/2685](https://togithub.com/bazelbuild/rules_rust/pull/2685)
- \[Bugfix] Convert metadata keys to screaming snake case instead of
screaming kebab case in `cargo_build_script_runner` by
[@&#8203;Pagten](https://togithub.com/Pagten) in
[https://github.com/bazelbuild/rules_rust/pull/2682](https://togithub.com/bazelbuild/rules_rust/pull/2682)
- Add support for override_target when using bzlmod by
[@&#8203;AmeliasCode](https://togithub.com/AmeliasCode) in
[https://github.com/bazelbuild/rules_rust/pull/2683](https://togithub.com/bazelbuild/rules_rust/pull/2683)
- Release 0.46.0 by
[@&#8203;illicitonion](https://togithub.com/illicitonion) in
[https://github.com/bazelbuild/rules_rust/pull/2686](https://togithub.com/bazelbuild/rules_rust/pull/2686)

##### New Contributors

- [@&#8203;mattem](https://togithub.com/mattem) made their first
contribution in
[https://github.com/bazelbuild/rules_rust/pull/2660](https://togithub.com/bazelbuild/rules_rust/pull/2660)
- [@&#8203;EdSchouten](https://togithub.com/EdSchouten) made their first
contribution in
[https://github.com/bazelbuild/rules_rust/pull/2671](https://togithub.com/bazelbuild/rules_rust/pull/2671)
- [@&#8203;mmorel-35](https://togithub.com/mmorel-35) made their first
contribution in
[https://github.com/bazelbuild/rules_rust/pull/2678](https://togithub.com/bazelbuild/rules_rust/pull/2678)
- [@&#8203;ograff](https://togithub.com/ograff) made their first
contribution in
[https://github.com/bazelbuild/rules_rust/pull/2674](https://togithub.com/bazelbuild/rules_rust/pull/2674)
- [@&#8203;Pagten](https://togithub.com/Pagten) made their first
contribution in
[https://github.com/bazelbuild/rules_rust/pull/2682](https://togithub.com/bazelbuild/rules_rust/pull/2682)

**Full Changelog**:
bazelbuild/rules_rust@0.45.1...0.46.0

</details>

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