ESLint Annotate from Report JSON

Version 3.0.0

See the Changelog for breaking changes when upgrading from v1 or v2

Description

Analyzes an ESLint a report JSON file and posts the results.

On pull_request annotates the pull request diff with warnings and errors

On push creates a ESLint Report Analysis with a summary of errors and warnings, including links to the line numbers of the violations.

Why another ESLint action?

The others I tried to use ran ESLint in NodeJS themselves. With this action, I can take an ESLint report generated from the command line and process the results.

This allows for more flexibility on how ESLint is run. This action is agnostic enough to handle different configurations, extensions, etc. across projects without making assumptions on how ESLint should be run.

Inputs

Name	Description	Required	Default Value
GITHUB_TOKEN	The GITHUB_TOKEN secret	No	${{ github.token }}
report-json	Path or glob pattern to locate the ESLint report JSON file. Use multiple lines to specify multiple glob patterns.	No	eslint_report.json
only-pr-files	Only annotate files changed when run on the pull_request event	No	true
fail-on-warning	Fail the GitHub Action when ESLint warnings are detected. Set to true to enable.	No	false
fail-on-error	Whether to fail the Github action when ESLint errors are detected. If set to false, the check that is created will still fail on ESLint errors.	No	true
check-name	The name of the GitHub status check created.	No	ESLint Report Analysis
markdown-report-on-step-summary	Whether to show a markdown report in the step summary.	No	false

Outputs

Name	Description
summary	A short description of the error and warning count
errorCount	The amount of errors ESLint reported on
warningCount	The amount of warnings ESLint reported on

Usage Example

In .github/workflows/nodejs.yml:

name: Example NodeJS Workflow

on: [pull_request]

jobs:
  node_test:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4
      - name: Setup Node
        uses: actions/setup-node@v4
        with:
          node-version: 20
          cache: 'npm'
      - name: Install Node Dependencies
        run: npm ci
        env:
          CI: TRUE
      - name: Test Code Linting
        run: npm run lint
      - name: Save Code Linting Report JSON
        # npm script for ESLint
        # eslint --output-file eslint_report.json --format json src
        # See https://eslint.org/docs/user-guide/command-line-interface#options
        run: npm run lint:report
        # Continue to the next step even if this fails
        continue-on-error: true
      - name: Annotate Code Linting Results
        uses: ataylorme/eslint-annotate-action@v3
        with:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          report-json: "eslint_report.json"
      # OPTIONAL: save a copy of the usage report for download or use in another job
      # - name: Upload ESLint report
      #   uses: actions/upload-artifact@v4
      #   with:
      #     name: eslint_report.json
      #     path: eslint_report.json
      #     retention-days: 5