git-synchronizer

git-synchronizer allows you to mirror a collection of git repositories from one location to another. For each source repository, you can set a destination repository to which the source should be mirrored (see example configuration file). Synchronization between all source-destination repository pairs in performed concurrently.

git-synchronizer will:

• push all branches and tags from source to destination repository,
• remove branches and tags from the destination repository which are no longer present in source repository.

Installing

Simply download the project for your distribution from the releases page. git-synchronizer is distributed as a single binary file and does not require any additional system requirements.

Usage

git-synchronizer is a command line utility, so after installing the binary in your PATH, simply run the following command to view its capabilities:

git-synchronizer --help

Configuration file

By default git-synchronizer attempts to read ~/.git-synchronizer, ~/.git-synchronizer.yaml and ~/.git-synchronizer.yml configuration files. If any of these files exist, git-synchronizer uses options defined there, unless they are overridden by command line flags.

You can also specify custom path to configuration file with --config <your-configuration-file>.yml command line flag.

Example contents of configuration file:

# Default authentication methods to use for source and destination repositories (optional).
defaults:
  source:
    auth:
      method: token
      # Name of environment variable storing the Personal Access Token
      # with permissions to read source repositories.
      token_name: GITHUB_TOKEN
  destination:
    auth:
      method: token
      # Name of environment variable storing the Personal Access Token
      # with permissions to push to destination repositories.
      token_name: GITLAB_TOKEN

# List of repository pairs to be synchronized.
repositories:

  # Repositories using default tokens.
  - source:
      repo: https://github.example.com/org-1/repo-1
    destination:
      repo: https://gitlab.example.com/org-5/repo-1

  - source:
      repo: https://github.example.com/org-1/repo-2
      # Overriding token for source repository.
      auth:
        method: token
        token_name: GITHUB_TOKEN_EXTRA
    destination:
      repo: https://gitlab.example.com/org-5/repo-2

  - source:
      repo: https://github.example.com/org-1/repo-3
    destination:
      repo: https://gitlab.example.com/org-5/repo-3
      # Overriding token for destination repository.
      auth:
        method: token
        token_name: GITLAB_TOKEN_EXTRA

Environment variables

git-synchronizer reads environment variables with GITSYNCHRONIZER_ prefix and tries to match them with CLI flags. For example, setting the following variables will override the respective values from configuration file: GITSYNCHRONIZER_LOGLEVEL etc.

The order of precedence is:

CLI flag → environment variable → configuration file → default value.

To check the available names of environment variables, please run git-synchronizer --help.

Please note that providing the list of repositories to be synchronized with a CLI flag is not supported.

Development

This project is built with the Go programming language.

Development Environment

It is recommended to use Go 1.21+ for developing this project. This project uses a pre-commit configuration and it is recommended to install and use pre-commit when you are developing this project.

Common Commands

Run make help to list all related targets that will aid local development.

License

git-synchronizer is licensed under the Apache 2.0 license. See LICENSE for details.