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Tool for maintaining mirrors of GitHub repos

Project description

replicate-github sets up and maintains mirrors of GitHub organizations and individual repos. It can serve webhook endpoints and keep the mirrors updated continuously, or it can be run ad hoc from the command line.

$ replicate-github --verbose mirror puppetlabs/puppet 'github/*'
mirror.Collection: Fetching puppetlabs/puppet
mirror.Collection: Fetching github/garethr-docker
mirror.Collection: Fetching github/github-ldap
$ replicate-github --verbose serve --update-org github
WebhookServer: Webhook server listening on localhost:8080 - - [10/Aug/2016 01:18:35] "POST / HTTP/1.1" 202 -
mirror.Collection: Fetching puppetlabs/puppet


The webhook server accepts POST to any URL (the path is ignored). A shared secret should be set so that events can’t be sent from non-GitHub sources.

By default the webhook server ensures that mirrors are updated at least once a day if no events are received. See replicate-github serve --help for more information.

GitHub webhook configuration

Create the webhook with any URL under the one served by the application. Set the secret to a random string, and put it in replicate-github.yaml like so:

  secret: "secret configured for webhook in GitHub"

Select the “Repository” and “Push” events to send.


If a secret is configured then any event not containing the correct secret will be rejected.

Only two parts of the payload are used: the full name of the repo, and the deleted flag. The full name of the repo is validated to ensure it contains no special characters (like / or .).

This will create or update a mirror for any repo name as long as the secret is correct. That means if you configure the webhook for a repo that hasn’t already been mirrored it will start mirroring the repo as soon as an event comes in.

Configuration file

Configuration is loaded from the value of --config-file, which defaults to /etc/replicate-github.yaml. The file requires three settings:

mirror_path: "/srv/replicate-github"
github_user: "GitHub username"
github_token: "GitHub API token"

You can generate a GitHub API token under Settings > Personal access tokens.

There is an additional top level option, workers, that sets the number of git subprocesses that can be run at once. It defaults to 1.

Optionally, defaults for subcommands (e.g. serve) may be set:

  secret: "secret configured for webhook in GitHub"
  port: 8000
    - github
    - puppetlabs

Note that parameter names in the configuration file use “_” instead of “-”. For example, the parameter --update-org is called update_org in the configuration file.

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