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https://github.com/actions/upload-code-coverage

Upload code coverage report from your GitHub Actions workflow
https://github.com/actions/upload-code-coverage

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Upload code coverage report from your GitHub Actions workflow

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README

          

# Upload Code Coverage

Upload a Cobertura XML coverage report to GitHub's code coverage API.

## Usage

```yaml
- uses: actions/upload-code-coverage@v1
with:
file: cobertura.xml
language: Java
label: code-coverage/jacoco
```

The action handles everything else automatically: gzip/base64 encoding, resolving the correct commit SHA and ref, detecting PR number (from both `pull_request` and `push` events), and calling the upload API.

## Inputs

| Input | Required | Description |
|-------|----------|-------------|
| `file` | Yes | Path to the Cobertura XML coverage report |
| `language` | Yes | Linguist language name (e.g. `Java`, `Go`, `Python`) |
| `label` | Yes | Label for the report (e.g. `code-coverage/jacoco`) |
| `token` | No | GitHub token (defaults to `github.token`) |

## Permissions

The calling workflow or job must grant `code-quality: write`. The action cannot declare this itself.

```yaml
permissions:
contents: read
code-quality: write
```

For push-only workflows where the action looks up PR numbers via `gh pr list`, also add `pull-requests: read`.

## Event handling

The action auto-detects the event type and resolves the correct values:

- **`pull_request` / `pull_request_target`**: Uses the PR head SHA and ref (not the merge commit), and includes the PR number.
- **`push`**: Uses `github.sha` and `github.ref`, and looks up whether the branch has an open PR via `gh pr list`.

This means it works with both patterns — workflows triggered by `pull_request` and push-only workflows that serve PRs via branch pushes.

## Full example (separate upload job)

```yaml
name: CI

on:
push:
branches: [main]
pull_request:

jobs:
build:
runs-on: ubuntu-latest
permissions:
contents: read
steps:
- uses: actions/checkout@v4
with:
ref: ${{ github.event.pull_request.head.sha || github.sha }}

# ... build and generate cobertura.xml ...

- uses: actions/upload-artifact@v4
if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
with:
name: cobertura-report
path: cobertura.xml

upload-coverage:
needs: build
if: ${{ !cancelled() && needs.build.result == 'success' && (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository) }}
runs-on: ubuntu-latest
permissions:
contents: read
code-quality: write
steps:
- uses: actions/download-artifact@v4
with:
name: cobertura-report

- uses: actions/upload-code-coverage@v1
with:
file: cobertura.xml
language: Java
label: code-coverage/jacoco
```

## Caveats

- **Fork PRs are not supported.** Pull requests from forks don't have write access to the base repository, so the action cannot upload coverage. When a fork PR is detected, the action exits gracefully with a notice — it won't fail your CI.
- **Merge queue runs are skipped.** Coverage should be uploaded for PRs and the default branch, making merge queue uploads unnecessary. The action logs a warning and exits successfully.