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fix(ci): channel-only rust-toolchain.toml — kill the implicit component sync - #1756
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…nt sync
The file listed components/targets, so rustup implicitly synced them on
the first cargo invocation of EVERY CI job — a transactional install
that intermittently fails on hosted runners ("detected conflict:
bin/cargo-clippy", #1754 twice, while identical runs pass: per-runner
dice roll). CI jobs already declare components/targets explicitly via
dtolnay inputs; with the file channel-only the sync has nothing to do
and the class is dead. Non-nix dev setup documented in the file.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Pull request overview
This PR adjusts the repository’s Rust toolchain pin to be channel-only, removing components and targets from rust-toolchain.toml to avoid rustup’s implicit transactional component/target sync on first cargo invocation in CI jobs.
Changes:
- Removed
components = [...]andtargets = [...]fromrust-toolchain.toml, leaving onlychannel = "1.97.0". - Expanded the file’s comments to document why components/targets are intentionally managed by CI workflow steps (dtolnay action inputs) rather than via rustup override sync.
- Added developer guidance for manually installing needed components/targets.
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Codecov Report✅ All modified and coverable lines are covered by tests. 📢 Thoughts on this report? Let us know! |
✅ Compatibility Test Results
What's tested
Full results available in workflow artifacts |
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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What
Trims
rust-toolchain.tomlto channel only, removing thecomponents/targetslists.Why (#1754's blocking failure, twice)
With components listed, rustup implicitly syncs them on the first cargo invocation of every CI job — a transactional install that intermittently fails on hosted runners:
failed to install component: 'clippy-preview…', detected conflict: 'bin/cargo-clippy', thenrolling back changes. #1754 hit it on two consecutive runs while byte-identical syncs succeeded on main minutes earlier (same runner-image version, same toolchain point release) — a per-runner dice roll, and re-rolling per run isn't acceptable CI.Every CI job already declares what it needs via the dtolnay action's
components:/targets:inputs (verified: clippy job passesclippy, fmt passesrustfmt, wasm/downstream jobs pass their targets, quality/release passllvm-tools-preview) — nothing relies on the file's sync. Channel-only, the sync has nothing to install and the failure class is structurally dead.Non-nix developer setup is documented in the file (
rustup component add …once).Sequencing
Merge before #1754/#1755 re-run; their branches pick this up via update-branch.
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