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How we fixed incorrect Codecov bundle size reporting

Blog post from Sentry

Post Details
Company
Date Published
Author
Nicholas Deschenes
Word Count
1,783
Company Posts That Month
10
Language
English
Hacker News Points
-
Post removed?
No
Summary

Bundle Analysis is a new product from Codecov designed to provide developers with insights into their JavaScript bundles by using a set of bundler plugins that integrate with various Git workflows. These plugins, once installed and configured, collect data during the application bundling process and upload it to Codecov, allowing developers to analyze metrics such as bundle size and problematic assets. A key feature of Bundle Analysis is its ability to work with GitHub Actions, where it faces challenges due to merge commits created during the CI process, which can result in incorrect commit SHAs. To address these issues, Codecov uses the @actions/github package to correctly identify and compare the head and base commit SHAs by leveraging the GitHub Action context payload. This ensures accurate tracking and comparison of bundle statistics even in fast-paced development environments with numerous contributors. The bundle stats are processed and stored in a SQLite database, where the correct commit SHAs are maintained for analysis, while also providing a fallback to the pull request's comparison commit SHA for coverage comparisons.

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