Coverage upload to Codecov fails on `main` branch
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Assessment
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Newbie friendliness
- 68/100
- Issue type
- Bug
- Clarity
- Mostly clear
- Activity status
- Quiet
- Tech stack
- github-actions
- Domain
- ci-cd
Research direction
Start with the coverage upload job in the linked GitHub Actions run and review the Codecov token guidance linked in the issue. Configure the repository token for uploads from the protected main branch, then verify that the job succeeds and pull-request coverage reports no longer omit executed lines.
Written by the indexing model from the issue text.
Description
It looks like coverage upload is failing on the main branch because a token is not configured. For example, coverage upload in this job (https://github.com/xarray-contrib/cf-xarray/actions/runs/23146050340/job/67234365718) failed with:
error - 2026-03-16 13:27:53,656 -- Upload failed: {"message":"Token required because branch is protected"}
This results in inaccurate coverage reports on pull requests, e.g. https://github.com/xarray-contrib/cf-xarray/pull/622#issuecomment-4126762199, where lines are reported as missing coverage, while they are in fact executed when running the tests.
This issue can likely be solved by setting up a Codecov token for this repository. See https://docs.codecov.com/docs/codecov-tokens for further info.
- Dominant language
- Python
- Stars
- 181
- Forks
- 49
- Avg merge
- 43m
- Merged PRs (30d)
- 1
Contributor guide
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First steps
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- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
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