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fix(gate): skip the Rust build cache on a repo with no Cargo manifest#55

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Merged
forkwright merged 1 commit into from
Aug 25, 2026
Merged

fix(gate): skip the Rust build cache on a repo with no Cargo manifest #55

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16 changes: 16 additions & 0 deletions .github/workflows/hybrid-gate.yml
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Expand Up@@ -314,7 +314,23 @@ jobs:
components: rustfmt, clippy
cache: false

# WHY guarded: rust-cache shells out to `cargo metadata`, which fails outright on a
# repo with no Cargo.toml -- `error: could not find Cargo.toml`. Consumers of this gate
# are not all Rust repos: several pass `true` for fmt/clippy/nextest and use check_cmd
# for their own non-Rust checks, which works fine until this step runs unasked and
# fails the whole job for a cache it could never have populated.
- name: Detect a Cargo manifest
id: cargo-manifest
run: |
if [ -f Cargo.toml ]; then
echo "present=true" >> "$GITHUB_OUTPUT"
else
echo "present=false" >> "$GITHUB_OUTPUT"
echo "no Cargo.toml at the repo root; skipping the Rust build cache"
fi

- uses: Swatinem/rust-cache@f0d9c3887740aee45f6153b24b3a6b815192ec16 # v2
if: steps.cargo-manifest.outputs.present == 'true'
with:
key: ${{ inputs.rust_cache_key }}

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