rust-lang / rust-lang/rustc-perf

Add endpoint for accessing the shas of unrolled PR builds

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Dominant language
Rust
Stars
733
Forks
189
Avg merge
10h 52m
Merged PRs (30d)
43

Description

We now have support for unrolling a rollup and building artifacts for them. The shas identifying these artifacts are then posted to GitHub, but they are not stored anywhere else. It would be nice to expose and endpoint that allows others to ask for this information.

We could do this by adding a database table which stores the mapping of PR to sha. However, since creating the sha should be reproducible, it might be possible to do this on demand.

One additional note, since these builds have proved useful for more than just perf (e.g., for catching regressions), it feels a bit weird that this lives in rustc-perf. I'm not sure where else this should go though.

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

No files or tests are named. Start by tracing the existing unrolled-rollup build flow and where artifact SHAs are posted to GitHub, then determine whether the endpoint should query stored PR-to-SHA mappings or reproduce them on demand. Done means an agreed API design and an endpoint that reliably returns the relevant SHAs.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
api, backend
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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