holocron-sync 1.1.0

Holocron: The Ultimate Git Mirroring Tool

Holocron

The "Ultimate" Git Mirroring Tool

          /\
         /  \
        / /\ \
       / /  \ \
      / /    \ \
     /_/______\_\
     \ \      / /
      \ \    / /
       \ \  / /
        \ \/ /
         \  /
          \/

Holocron is a powerful Python application designed to mirror your GitHub repositories to a local directory or a self-hosted GitLab instance. It supports parallel syncing, continuous watch mode, and local-only backups (no GitLab required). Ideal if you need a local backup for any reason.

Features

• Parallel Syncing: Sync multiple repositories concurrently for maximum speed.
• Continuous Watch Mode: Polls for changes and syncs only when necessary (smart redundancy checks).
• Two-Way Mirroring: Creates a bare mirror (.git folder) for safety AND an optional checkout for visibility.
• Dockerized: Runs as a lightweight container.
• Backup Level:
  • Full: GitHub -> Local -> GitLab
  • Backup-Only: GitHub -> Local (No GitLab token needed)

Quick Start

PyPI (pip / uv)

Valuable for local usage or scripting.

pip install holocron-sync
# or
uv tool install holocron-sync

Docker (Recommended for continuous operation)

Run Holocron instantly with a single command:

docker run -d \
  -e GITHUB_TOKEN="your_github_token" \
  -v $(pwd)/mirror-data:/app/mirror-data \
  ghcr.io/someniak/holocron

For full configuration options, environment variables, and Docker Compose examples, please refer to the Docker Guide.

Running from Source

# Install dependencies
uv sync

# Run a one-time backup of all your repos locally (visible files)
export GITHUB_TOKEN=your_token
uv run python src/holocron.py --backup-only --checkout --concurrency 10

Configuration

Holocron uses environment variables for secrets:

Variable	Description	Required
GITHUB_TOKEN	Your GitHub Personal Access Token (repo scope)	Yes
GITLAB_TOKEN	Your GitLab Personal Access Token (api scope)	No (if --backup-only)
GITLAB_API_URL	URL to your GitLab API (default: http://gitlab.local/api/v4)	No (if --backup-only)
GITHUB_API_URL	URL to your GitHub API (default: https://api.github.com)	No

API Permissions

Ensure your tokens have the minimum required scopes:

GitHub Token (GITHUB_TOKEN)

• repo (Full control of private repositories) - Required for reading private repos
• read:org (Read org and team membership) - Required for fetching organization repos

GitLab Token (GITLAB_TOKEN)

• api (Grants complete read/write access to the API) - Simplest option
• OR read_repository + write_repository - More granular control

Command Line Arguments

Flag	Default	Description
--watch	False	Run continuously in a loop
--interval	60	Seconds to sleep between checks in watch mode
--window	60	Sync only repos pushed within the last N minutes
--backup-only	False	Mirror locally only, do not push to GitLab
--checkout	False	Create a visible working directory alongside the mirror
--concurrency	5	Number of parallel sync threads
--storage	./mirror-data	Directory to store repositories
--dry-run	False	Print what would happen without doing it
--verbose	False	Enable detailed debug logging

Development

Running Tests

To run the test suite:

uv run pytest

With coverage:

uv run pytest --cov=src