elm-format --validate

Validate your Elm files using elm-format - any unformatted files will cause the check to fail and a note will be added to each failing file.

Finding elm-format

You must have elm-format available in your build, here is an example where elm-format is in package.json.

jobs:
  lint:
    steps:
    - uses: actions/checkout@v2
    - run: yarn
    - name: Add elm-format to path
      run: yarn bin >> $GITHUB_PATH
    - uses: sparksp/elm-format-action@v1
      with: 
        # elm_format: elm-format
        # elm_files: src/
        # elm_glob: false
        # working-directory: ./

Multiple Files

To match multiple files or directories, list each on a new line...

    - uses: sparksp/elm-format-action@v1
      with: 
        elm_files: |
          src/Main.elm
          src/Wait.elm
          tests/          

File Glob

This action supports file globs using @actions/glob. elm-format will process each file or directory it is given, so take care to match only elm files OR directories with your globs.

    - uses: sparksp/elm-format-action@v1
      with: 
        # Match all elm files except any TW.elm
        elm_files: |
          src/**/*.elm
          !**/TW.elm          
        elm_glob: true