Error: Cannot overwrite directory with non-directory

[ghost]

Hi, first all, thanks for this action to make me be more focused on writing posts, not for spend so much time to maintaining the deploy scripts

Behaviour

Pushed code, actions build exit successfully but report: Error: Cannot overwrite directory '/tmp/xxx' with non-directory '/home/runner/work/xxx'

Steps to reproduce this issue

1. Making some changes
2. Push to repository
3. GitHub Actions building...

Expected behaviour

The gh-pages branch should contain builded site

Actual behaviour

GitHub actions report the error: Error: Cannot override directory '/tmp/xxx' with non-directory '/home/runner/work/xxx'

Configuration

• Repository URL (if public): Source
• Build URL (if public): Actions detail

# paste your YAML workflow file here and remove sensitive data
- uses: crazy-max/ghaction-github-pages@v2
  if: success()
  with:
    verbose: true
    build_dir: site
    target_branch: gh-pages
    keep_history: true
  env:
    GITHUB_TOKEN: ${{ secrets.TOKEN }}

Logs

2021-09-29T03:09:11.9604280Z ##[group]Run crazy-max/ghaction-github-pages@v2
2021-09-29T03:09:11.9604921Z with:
2021-09-29T03:09:11.9605294Z   verbose: true
2021-09-29T03:09:11.9605703Z   build_dir: site
2021-09-29T03:09:11.9606157Z   target_branch: gh-pages
2021-09-29T03:09:11.9606614Z   keep_history: true
2021-09-29T03:09:11.9607057Z   domain: github.com
2021-09-29T03:09:11.9607541Z   allow_empty_commit: true
2021-09-29T03:09:11.9607966Z   jekyll: true
2021-09-29T03:09:11.9608361Z   dry_run: false
2021-09-29T03:09:11.9608718Z env:
2021-09-29T03:09:11.9610179Z   GITHUB_TOKEN: ***
2021-09-29T03:09:11.9610623Z ##[endgroup]
2021-09-29T03:09:12.3716308Z ##[group]Cloning c4dr01d/c4dr01d.github.io
2021-09-29T03:09:12.3750901Z [command]/usr/bin/git clone --quiet --branch gh-pages --depth 1 ***github.com/c4dr01d/c4dr01d.github.io.git .
2021-09-29T03:09:12.8148526Z ##[endgroup]
2021-09-29T03:09:12.8157710Z ##[group]Copying /home/runner/work/c4dr01d.github.io/c4dr01d.github.io/site to /tmp/github-pages-3IjFT9
2021-09-29T03:09:12.8180535Z ##[error]Error: Cannot overwrite directory '/tmp/github-pages-3IjFT9' with non-directory '/home/runner/work/c4dr01d.github.io/c4dr01d.github.io/site'.
2021-09-29T03:09:12.8194358Z 0 file(s) copied.
2021-09-29T03:09:12.8195704Z ##[endgroup]
2021-09-29T03:09:12.8267307Z No changes to commit

[wolverian]

This happens at least when the build_dir is a symbolic link.

[crazy-max]

Should be fixed with follow_symlinks input: #161