How to

1. Create a copy of this CRON repository and then configure it:
   • Settings → Actions → General, in section Actions permissions select Allow all actions and reusable workflows, and then save.
   • Edit the file .github/workflows/mirror.yml to change the URL of the cloned repo and the URL of the destination mirror repo.
2. Create a new empty repository. Don't create a README.md or anything else. It will be used as the mirror and so it needs to be empty.
3. Create a new Fine-grained personal access token so that the CI can push to your GitHub mirror repo:
   • Open https://github.com/settings/personal-access-tokens/new
   • Fill in the following information:
     • Token name: choose any name you want, it doesn't matter.
     • Expiration: set it to the max (as of writing 1 year is the max :-/).
     • Repository access: choose Only select repositories and then pick only the GitHub repository where the mirror will be pushed. In my case it's nextcloud-htmlviewer.
     • Repository permissions: choose Read and write for the Contents permission and No access for everything else.
     • Account permissions: select No access for everything.
   • Click on Generate token and then copy the token. For example mine starts with github_pat_.
4. Create a new GitHub Actions secret for that token in the CRON repository that you created in the first step:
   • Settings → Secrets and variables → Actions and fill in this:
     • Name: MIRROR_REPOSITORY_PERSONAL_ACCESS_TOKEN
     • Secret: paste the generated token that you created in the previous step. Not the name of the token, but the token itself. In my case it starts with github_path_.
   • Click on Add secret.
5. Trigger the action for the first time from the CRON repo you created in the first step:
   • Actions → Update devnoname120/nextcloud-htmlviewer mirror → Run workflow → Run workflow.

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