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fix(mip): name --no-fetch when remote cache setup fails - #2066
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norrietaylor merged 3 commits intoOct 7, 2026
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Patched-build paths construct the remote cache up front via remote_cache(false, false). When that setup fails, the error is surfaced bare, so users are not told they can turn the fetch off. Wrap the remote-cache setup error at all three call sites (mip cmd_pkg_patched_build, mctx EnvChannel::run_patched_pkg, minimald SessionChannel::run_patched_pkg) to name the setup failure and point at --no-fetch as the offline switch. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Included review availability: This review used your included allowance. Your plan provides up to 5 included reviews per hour; 0 remain after this review. 📝 WalkthroughWalkthroughRemote-cache setup errors now use shared formatting that includes setup context and cause details. The mctx and minimald paths display the formatted error chain. The mip command adds a ChangesRemote-cache setup error reporting
Priority: ⬇️ Low Estimated code review effort: 2 (Simple) | ~10 minutes Change: Bug fix Suggested reviewers: Merge Risk: ⚪ Minimal · up to The change improves remote-cache setup errors without an identified merge-blocking issue. Merge after normal checks. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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Actionable comments posted: 1
- 🪄 Fix CodeRabbit comments on this PR
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Review comments at @crates/minimald/src/env.rs:
- Around line 1272-1283: Remove the unusable `--no-fetch` advice from the
remote-cache setup error in the `remote_cache` call within the session context,
leaving the error message to report the setup failure and its cause. The
parallel `mctx` handler needs a separate edit.
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crates/mctx/src/env.rscrates/minimald/src/env.rscrates/mip/src/cmd_pkg_patched_build.rs
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Only mip has a --no-fetch flag. The daemon's context never sets no_fetch,
and the in-sandbox min helper rejects any flag, so the minimald and mctx
patched-pkg paths no longer promise a switch their user cannot reach.
All three sites now go through mctx's From<rcache::Error>, which renders
rcache's Config variant cleanly instead of its Debug form, and wrap the
cause with anyhow context rendered with {:#} so it stays visible.
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/review |
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One helper, remote_cache_setup_error, builds the error at all three
callers; unit tests pin the {:#} rendering, the clean Config cause, and
the hinted variant mip uses.
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/review |
norrietaylor
approved these changes
Oct 7, 2026
norrietaylor
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inbox-patch/fix/no-fetch-error-remote-cache-00ed1292ac72f7eb
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October 7, 2026 14:20
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Routing-Key: inbox-route/I_kwDOSUhdos8AAAABVlcf1A
Patched-build paths construct the remote cache up front via
remote_cache(false, false)(introduced in #2054). When that setup fails, the error is surfaced bare, so users are never told they can switch off the fetch.This change routes the remote-cache setup error at all three call sites through one helper,
mctx::remote_cache_setup_error, so the message readsfailed to set up the remote artifact cache: <cause>with the cause rendered cleanly (not the Debug form ofrcache::Error). Unit tests inmctxpin the rendering.The offline hint is named only where the user can act on it:
mip pkg patched-build:--no-fetchis a globalmipflag, so the message adds(pass --no-fetch to build without it).minimald::SessionChannel::run_patched_pkgandmctx::EnvChannel::run_patched_pkg(min package patched-buildinside a box): no hint. The daemon context never setsno_fetch, and the in-boxminhelper takes no flags, so naming--no-fetchthere would be wrong.The pre-existing
remote_storage()errors are left untouched; the defect is specifically the up-front remote-cache setup from #2054. Resolves gominimal/inbox#996.Verification
cargo fmt --all --check --manifest-path Cargo.toml— cleancargo clippy --workspace --all-targets --locked --manifest-path Cargo.toml -- -D warnings— cleancargo test --locked --manifest-path Cargo.toml -p mip -p mctx— 12 passedcargo test --locked --manifest-path Cargo.toml -p minimald— 856 passed; 13 failed, all in pre-existing netns/gvproxy/switch tests requiring root privileges and network isolation (unrelated to this string-only change)Summary by CodeRabbit
--no-fetch.