WORK IN PROGRESS

Adaption from the solution by spyoungtech/mirror-action.

Difference:

Uses git commands to create a local copy of source repository on docker images.
Clones the destination repository.
Copies content from source to destination repository without hidden files (.git, actions, .github) (Prevents action from running on destination end)
Pushes to the destination repository without overwrite.
Prefers error than forced push.

Notes

Working in a similar fashion to example action workflow in supes1100/circlicitest
Perfect for copying from third party repo and conducting CI/CD on your repo. (Without forking)

Example:

name: Mirror
on: [ push, delete, create ]


# Ensures that only one mirror task will run at a time.
concurrency:
  group: git-mirror
jobs:
  git-mirror:
    runs-on: ubuntu-latest
    steps:
      - name: git-mirror-2
        uses: TheTipsyTurtle/mirror-action@master
        env:
          PUSH_ALL_REFS: "false"
        with:
          REMOTE: git@github.com:TheTipsyTurtle/circleci5.git
          GIT_SSH_PRIVATE_KEY: ${{ secrets.SSH_PRIVATE_KEY }}
          GIT_SSH_NO_VERIFY_HOST: "true"
          GIT_PUSH_ARGS: --prune

Following lines: spyoungtech. He explains best.

A lot is WIP from my end

mirror-action

A GitHub Action for mirroring your commits to a different remote repository

This project is mirrored on GitLab

Example workflows

Mirror a repository with username/password over HTTPS

For example, this project uses the following workflow to mirror from GitHub to GitLab

on: [push]
  ...
      steps:
        - uses: actions/checkout@v1
        - uses: spyoungtech/mirror-action@master
          with:
            REMOTE: 'https://gitlab.com/spyoungtech/mirror-action.git'
            GIT_USERNAME: spyoungtech
            GIT_PASSWORD: ${{ secrets.GIT_PASSWORD }}

Be sure to set the GIT_PASSWORD secret in your repo secrets settings.

NOTE: by default, all branches are pushed. If you want to avoid this behavior, set PUSH_ALL_REFS: "false"

You can further customize the push behavior with the GIT_PUSH_ARGS parameter. By default, this is set to --tags --force --prune

If something goes wrong, you can debug by setting DEBUG: "true"

Mirror a repository using SSH

Requires version 0.4.0+

Pretty much the same, but using GIT_SSH_PRIVATE_KEY and GIT_SSH_KNOWN_HOSTS

      steps:
        - uses: actions/checkout@v1
        - uses: spyoungtech/mirror-action@master
          with:
            REMOTE: 'ssh://git@gitlab.com/spyoungtech/mirror-action.git'
            GIT_SSH_PRIVATE_KEY: ${{ secrets.GIT_SSH_PRIVATE_KEY }}
            GIT_SSH_KNOWN_HOSTS: ${{ secrets.GIT_SSH_KNOWN_HOSTS }}

GIT_SSH_KNOWN_HOSTS is expected to be the contents of a known_hosts file.

Be sure you set the secrets in your repo secrets settings!

NOTE: if you prefer to skip hosts verification instead of providing a known_hosts file, you can do so by using the GIT_SSH_NO_VERIFY_HOST input option. e.g.

      steps:
        - uses: actions/checkout@v1
        - uses: spyoungtech/mirror-action@master
          with:
            REMOTE: git@gitlab.com/spyoungtech/mirror-action.git
            GIT_SSH_PRIVATE_KEY: ${{ secrets.GIT_SSH_PRIVATE_KEY }}
            GIT_SSH_NO_VERIFY_HOST: "true"

WARNING: this setting is a compromise in security. Using known hosts is recommended.