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@kaidokert kaidokert commented Jun 30, 2025

Summary by Sourcery

CI:

  • Introduce a new 'Coverage' workflow that runs on all pushes and pull requests to install Rust, set up cargo-llvm-cov, generate LCOV coverage data, and send it to Coveralls

Summary by CodeRabbit

  • Chores
    • Added automated code coverage reporting for all code changes, with coverage reports now uploaded to Coveralls.

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Gemini is unable to generate a summary for this pull request due to the file types involved not being currently supported.

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sourcery-ai bot commented Jun 30, 2025

Reviewer's Guide

Introduces a new GitHub Actions workflow to automatically collect Rust coverage data with cargo-llvm-cov and submit it to Coveralls on every push and pull request.

File-Level Changes

Change Details Files
Added a CI workflow for coverage collection
  • Configured triggers for push and pull_request on all branches
  • Set up a coverage job on ubuntu-latest
  • Checked out the full repository history
  • Installed Rust with llvm-tools-preview
  • Installed cargo-llvm-cov via action
  • Generated lcov coverage report
  • Published results using Coveralls GitHub Action
.github/workflows/coverage.yml

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📥 Commits

Reviewing files that changed from the base of the PR and between d8dbbf6 and f280437.

📒 Files selected for processing (1)
  • README.md (1 hunks)

Walkthrough

A new GitHub Actions workflow named "Coverage" has been added. It runs on all branches for push and pull request events, sets up Rust with coverage tools, generates code coverage data using cargo-llvm-cov, and uploads the results to Coveralls. No code or public API changes were made.

Changes

File(s) Change Summary
.github/workflows/coverage.yml Added workflow for Rust code coverage collection and reporting, including integration with Coveralls.

Poem

In the warren, code now gleams,
With coverage checks in nightly dreams.
Rusty tools and Coveralls unite,
Reporting coverage left and right.
Each commit now gets a look,
Hopping forward—by the book!
🐇✨


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Hey @kaidokert - I've reviewed your changes and they look great!


Sourcery is free for open source - if you like our reviews please consider sharing them ✨
Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.

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Actionable comments posted: 1

🧹 Nitpick comments (1)
.github/workflows/coverage.yml (1)

33-34: Patch-level pin deviates from repo convention

You usually pin actions to major tags to pick up safe patch updates automatically.
coverallsapp/github-action@v2.3.6 is frozen to an exact patch; consider relaxing it:

-        uses: coverallsapp/github-action@v2.3.6
+        uses: coverallsapp/github-action@v2
📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between d88d7b5 and d8dbbf6.

📒 Files selected for processing (1)
  • .github/workflows/coverage.yml (1 hunks)
🧰 Additional context used
🧠 Learnings (1)
📓 Common learnings
Learnt from: kaidokert
PR: kaidokert/picojson-rs#1
File: .github/workflows/build.yaml:0-0
Timestamp: 2025-06-28T23:51:07.640Z
Learning: In GitHub Actions workflows, kaidokert prefers to pin actions to major version tags (e.g., @v1) rather than specific versions, as they automatically resolve to the latest patch/minor versions within that major version, providing both stability and automatic updates.
🔇 Additional comments (2)
.github/workflows/coverage.yml (2)

3-9: Possible double execution on every PR

push + pull_request on the same branch glob means the workflow fires twice for every PR coming from a branch in the same repo (once for the push that updates the branch and once for the PR event).
Coveralls will then receive two uploads, which can confuse status checks and distort coverage history.

If you don’t need both, keep only pull_request or add a conditional, e.g.

if: github.event_name == 'push' && github.event.ref != 'refs/heads/${{ github.event.pull_request.head.ref }}'

29-31: Ensure full workspace coverage & cache build to speed up runs

  1. If the repo is a Cargo workspace, add --workspace so you don’t miss member crates:
-          cargo llvm-cov --lcov --output-path lcov.info
+          cargo llvm-cov --workspace --lcov --output-path lcov.info
  1. Consider adding an actions/cache@v3 step for ~/.cargo and target to cut runtime by ~50 %.

@kaidokert kaidokert merged commit 5bfda3c into main Jun 30, 2025
24 checks passed
@kaidokert kaidokert deleted the cover branch June 30, 2025 04:10
@coderabbitai coderabbitai bot mentioned this pull request Jul 12, 2025
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