GitHub Action: Set up hlint

Downloads and a binary HLint release from @ndmitchell/hlint.

The release is cached using @actions/tool-cache and is added to PATH.

See also rwe/actions-hlint-run, which will run hlint and format its output for GitHub annotations.

• version: The HLint version to download. Defaults to 3.1.6.

• hlint-dir: Resulting directory containing the hlint executable
• hlint-bin: Location of the hlint executable
• version: Version of the hlint tool (same as input, if provided)

name: lint
on:
  pull_request:
  push:
    branches:
      - master
      - 'releases/*'

jobs:
  hlint:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2

    - name: 'Set up HLint'
      uses: rwe/actions-hlint-setup@v1
      with:
        version: '3.1.6'

    - name: 'Run HLint'
      uses: rwe/actions-hlint-run@v1
      with:
        path: src/
        fail-on: warning