Fix: Build only the specified artifact library when multiple types are available #13842
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Thank you for the patch! @bors r+ |
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test: clean up unnecessary uses of `match_exact` It was found during the review of <#13842 (comment)> We should be happy using `assert_match_exact` directly. The extra arguments to `match_exact` are not necessary for those test cases.
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test: clean up unnecessary uses of `match_exact` It was found during the review of <#13842 (comment)> We should be happy using `assert_match_exact` directly. The extra arguments to `match_exact` are not necessary for those test cases.
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Update cargo 10 commits in 05364cb2f61a2c2b091e061c1f42b207dfb5f81f..0ca60e940821c311c9b25a6423b59ccdbcea218f 2024-05-03 16:48:59 +0000 to 2024-05-08 01:54:25 +0000 - chore: Add cargo-lints to unstable docs (rust-lang/cargo#13881) - test: clean up unnecessary uses of `match_exact` (rust-lang/cargo#13879) - docs(ref): Correct heading level of `[lints]` documentation (rust-lang/cargo#13878) - Fix: Build only the specified artifact library when multiple types are available (rust-lang/cargo#13842) - docs: add missing CARGO_MAKEFLAGS env for plugins (rust-lang/cargo#13872) - Add more documentation to `cargo::rustc-check-cfg` (rust-lang/cargo#13869) - fix(toml): Remove unstable rejrected frontmatter syntax for cargo script (rust-lang/cargo#13861) - Update UI example code in contributor guide (rust-lang/cargo#13864) - style(test): Remove check-cfg warning (rust-lang/cargo#13865) - Fix global_cache_tracker::max_download_size test flakiness (rust-lang/cargo#13860) r? ghost
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What does this PR try to resolve?
Fixes #12109.
TL;DR:
A crate
barexposes it's library as both astaticliband acdylib. A second cratefoospecifies an artifact dependency of typestaticlibonbar, meaning cargo should buildbaras astaticliband expose certain environment variables (e.g.CARGO_STATICLIB_FILE_BAR). However, due to a bug, cargo ends up building (and exposing the associated environment variables) for both thestaticlibandcdylib.The same happens if
foospecifies an artifact dependency of typecdylib; both artifact types are built.How should we test and review this PR?
The first commit introduces a test which reproduces the issue, the second commit introduces the fix. This setup was recommended by @ehuss.
Additional information
Artifact dependencies: https://rust-lang.github.io/rfcs/3028-cargo-binary-dependencies.html
TL;DR
If a crate
foorequests an artifact dependency of kind <artifact_kind> from a cratebarthen the following happens:baris built with crate-type <artifact_kind> and a directory is created attarget/<profile>/deps/artifact/bar-<build_hash_or_something>/<artifact_kind>. The binary artifact is placed in this directory.CARGO_<artifact_kind>_FILE_BAR, which points to the binary artifact that was specified. This environment variable is available at compile time for normal dependencies and at runtime for build-dependencies.If multiple artifact-kinds are requested cargo will create a unit for each, and so they will all be built separately.