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@title Diffusion User Guide: Existing Repositories
@group userguide
Quick guide for importing or observing existing repositories.
Overview
========
If you have an existing repository, you can observe or import it into
Diffusion.
Observing a repository creates a read-only copy in Phabricator that is kept
up to date by continuously importing new changes.
Importing a repository creates a read-write copy.
This document is a quick guide to getting started. For an overview of
Diffusion, see @{article:Diffusion User Guide}. For a more detailed guide
about managing repositories and URIs in Diffusion, see
@{article:Diffusion User Guide: URIs}.
Observing Repositories
======================
To observe an existing repository:
- Create a repository in Diffusion, but do not activate it yet.
- Add the URI for the existing repository you wish to observe in the
**URIs** section, in **Observe** mode.
- Activate the repository in Diffusion.
This creates a read-only copy of the repository in Phabricator. Phabricator
will keep its copy in sync with the remote by periodically polling the remote
for changes.
For more details, see @{article:Diffusion User Guide: URIs}.
Importing Repositories
======================
There are two primary ways to import an existing repository:
**Observe First**: In Git or Mercurial, you can observe the repository first.
Once the import completes, change the "I/O Type" on the **Observe** URI to
"No I/O" mode to automatically convert it into a hosted repository.
**Push to Empty Repository**: Create and activate an empty repository, then push
all of your changes to the empty repository.
In Git and Mercurial, you can do this with `git push` or `hg push`.
In Subversion, you can do this with `svnsync`.
For more details, see @{article:Diffusion User Guide: URIs}.
Next Steps
==========
Continue by:
- reading an overview of Diffusion in
@{article:Diffusion User Guide}; or
- learning more about managing remote repository URIs in
@{article:Diffusion User Guide: URIs}.
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