Allow build scripts to report error messages through cargo::error
#14743
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Co-authored-by: Weihang Lo <weihanglo@users.noreply.github.com>
Upstream changed these messages slightly.
There was a concern raised about potential use of `cargo::error` by libraries, which could make it difficult for build script authors to decide what is an error. rust-lang#10159 (comment)
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This was referenced Oct 29, 2024
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Update cargo 18 commits in e75214ea4936d2f2c909a71a1237042cc0e14b07..0310497822a7a673a330a5dd068b7aaa579a265e 2024-10-25 16:34:32 +0000 to 2024-11-01 19:27:56 +0000 - Add more metadata to `rustc_fingerprint` (rust-lang/cargo#14761) - test(rustfix): switch to a simpler case for dedup-suggestions (rust-lang/cargo#14765) - chore(deps): update rust crate security-framework to v3 (rust-lang/cargo#14766) - chore(deps): update rust crate gix to 0.67.0 (rust-lang/cargo#14762) - fix(util): Respect all `..`s in `normalize_path` (rust-lang/cargo#14750) - test(doc): Resolve flaky test (rust-lang/cargo#14760) - refactor(test): Remove dead 'expect_stdout_contains_n' check (rust-lang/cargo#14759) - add unstable -Zroot-dir flag to configure the path from which rustc should be invoked (rust-lang/cargo#14752) - docs(resolver): Further v3 prep (rust-lang/cargo#14753) - fix: track version in fingerprint dep-info files (rust-lang/cargo#14751) - test: Remove unused msrv-policy (rust-lang/cargo#14748) - download targeted transitive deps of with artifact deps' target platform (rust-lang/cargo#14723) - Remove requirement for --target when invoking Cargo with -Zbuild-std (rust-lang/cargo#14317) - docs(fingerprint): document the encoding of Cargo's depinfo (rust-lang/cargo#14745) - Allow build scripts to report error messages through `cargo::error` (rust-lang/cargo#14743) - fix(publish): Downgrade version-exists error to warning on dry-run (rust-lang/cargo#14742) - fix: clean up for deprecated and removed commands (rust-lang/cargo#14739) - Deprecate `cargo verify-project` (rust-lang/cargo#14736)
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Adds the
cargo::errorbuild script directive. It is similar tocargo::warning, but it emits an error message and it also fails the build.This is a repost of #14435 with the tests updated, a note added to the documentation about using this in a library, and updating the MSRV.
Closes #10159