Add option to only check changed files?

[Justin-JHG]

Hi is it possible to add an option so that this action only checks files changed in the current pull request?

thanks

[Justin-JHG]

update, this is similar to issue #38

so this github action does support only check input list of files, for example only the files changed in the current pull request.

I did make it work and will attach my full workflow below, before that I will list the issues with this Github Action:

• the list of files passed into the path option needs to be space seperated instead of comma seperated, if using comma seperetd then the codespell would only check the last file in the list.
  e.g. it needs to be ./dir1/file1 ./dir2/file2 instead of ./dir1/file1, ./dir2/file2

  so the workflow in the current repo to test the path option doesn't work, and it will ignore README.md by default
  

  https://github.com/codespell-project/actions-codespell/blob/94259cd8be02ad2903ba34a22d9c13de21a74461/.github/workflows/testing.yml#LL73C27-L73C27

• the skip option by default is skipping ./.git instead of what advised as skipping nothing, so I had to hack it to say: skip: nothing

  exected:

  

  actual:

  

hope this helps anyone want to use this action for the same purpose, thanks

workflow for spelling check changed files in the pull request:

name: 🚥 Codespell

# workflow to check spelling errors on the changed files within the current pull request

on:
  pull_request:
    types: [opened, edited, synchronize]

jobs:
  codespell:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3

      - name: 🔸 Get Changed Files from Pull Request
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          # get file names and seperate them with space ' '
          files=$(gh pr diff ${{ github.event.pull_request.number }} --name-only | xargs -I {} sh -c 'echo "./{}"' | tr '\n' ' ')
          echo "CHANGED_FILES=$files" >> "$GITHUB_ENV"          

      - name: 🔸 Output Changed Files
        run: echo ${{ env.CHANGED_FILES }}
          
      - name: 🔸 Check for Spelling Errors for Changed Files
        uses: codespell-project/actions-codespell@v1
        with:
          check_filenames: true
          skip: nothing
          path: ${{ env.CHANGED_FILES }}

[akien-mga]

Thanks for documenting your workflow, I came here to suggest the same feature and could use your insights to implement the same in godotengine/godot#76828.