coverage-badge

A GitHub Action and CLI tool that generates shields.io-style SVG badges for test coverage.

Table of Contents

• Quick Start
• Full Workflow Example
• Action Inputs
• CLI Usage
• Color Thresholds
• License

Quick Start

Add this step to your workflow after running your coverage tool:

- name: Generate coverage badge
  uses: ozankasikci/rust-test-coverage-badge@v1
  with:
    coverage: ${{ steps.coverage.outputs.percentage }}
    output: assets/coverage.svg
    commit: true

That's it! The action generates the badge and commits it to your repo. Then reference it in your README:

![Coverage](assets/coverage.svg)

Full Workflow Example

Click to expand complete workflow

name: Coverage

on:
  push:
    branches: [main]

permissions:
  contents: write

jobs:
  coverage:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      # Replace with your actual coverage tool
      - name: Run tests with coverage
        id: coverage
        run: |
          # Example: extract coverage from your tool's output
          # For tarpaulin: jq '.coverage' tarpaulin-report.json
          # For pytest-cov: grep -oP 'TOTAL.*\s+\K\d+' coverage.txt
          echo "percentage=85.5" >> $GITHUB_OUTPUT

      - name: Generate coverage badge
        uses: ozankasikci/rust-test-coverage-badge@v1
        with:
          coverage: ${{ steps.coverage.outputs.percentage }}
          output: assets/coverage.svg
          commit: true
          commit-message: 'chore: update coverage badge'

Action Inputs

Input	Required	Default	Description
coverage	Yes	-	Coverage percentage (0-100, decimals allowed)
output	Yes	-	Output path for the SVG file
commit	No	false	Commit and push the badge
commit-message	No	Update coverage badge	Custom commit message

CLI Usage

For local development or custom setups, use the CLI directly.

Install:

# Via Cargo
cargo install coverage-badge

# Or download from Releases
# https://github.com/ozankasikci/rust-test-coverage-badge/releases

Run:

coverage-badge -c 85 -o assets/coverage.svg

Option	Short	Description
--coverage	-c	Coverage percentage (0-100, decimals allowed)
--output	-o	Output path for the SVG file

Color Thresholds

Coverage	Color
< 50%	Red
50-79%	Yellow
≥ 80%	Green

License

MIT