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Edit omniauth-oauth2-generic docs for style conformance

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doc/integration/oauth2_generic.md
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# Sign into Gitlab with (almost) any OAuth2 provider
The `omniauth-oauth2-generic` gem allows Single Sign On between Gitlab and your own OAuth2 provider (or any simple OAuth2 provider compatible with this gem)
The `omniauth-oauth2-generic` gem allows Single Sign On between Gitlab and your own OAuth2 provider
(or any OAuth2 provider compatible with this gem)
This strategy is designed to allow configuration of the simple OmniAuth SSO process outlined below:
@ -11,50 +12,54 @@ This strategy is designed to allow configuration of the simple OmniAuth SSO proc
1. Strategy parses user information from the response, using a **configurable** format
1. Gitlab finds or creates the returned user and logs them in
**Limitations of this Strategy:**
### Limitations of this Strategy:
- It can only be used for Single Sign on, and will not provide any other access granted by any OAuth provider (such as importing projects or users, etc).
- It can only be used for Single Sign on, and will not provide any other access granted by any OAuth provider
(importing projects or users, etc)
- It only supports the Authorization Grant flow (most common for client-server applications, like Gitlab)
- It is not able to fetch user information from more than one URL
- It has not been tested with user information formats other than JSON
### Config Instructions
1. To enable the OAuth2 generic strategy you must register your application in the OAuth2 provider you wish to authenticate with.
That provider should generate an ID and secret key for you to use with this strategy.
1. Register your application in the OAuth2 provider you wish to authenticate with.
The redirect URI you provide when registering the application should be:
```
http://your-gitlab.host.com/users/auth/oauth2_generic/callback
```
```
http://your-gitlab.host.com/users/auth/oauth2_generic/callback
```
1. You should now be able to get a Client ID and Client Secret. Where this shows up will differ for each provider.
This may also be called Application ID and Secret.
1. You should now be able to get a Client ID and Client Secret.
Where this shows up will differ for each provider.
This may also be called Application ID and Secret
1. On your GitLab server, open the configuration file.
1. On your GitLab server, open the configuration file.
For omnibus package:
For omnibus package:
```sh
sudo editor /etc/gitlab/gitlab.rb
```
```sh
sudo editor /etc/gitlab/gitlab.rb
```
For installations from source:
For installations from source:
```sh
cd /home/git/gitlab
```sh
cd /home/git/gitlab
sudo -u git -H editor config/gitlab.yml
```
sudo -u git -H editor config/gitlab.yml
```
1. See [Initial OmniAuth Configuration](omniauth.md#initial-omniauth-configuration) for initial settings.
1. See [Initial OmniAuth Configuration](omniauth.md#initial-omniauth-configuration) for initial settings
1. Add the provider-specific configuration for your provider, as [described in the gem's README](https://gitlab.com/satorix/omniauth-oauth2-generic#gitlab-config-example)
1. Add the provider-specific configuration for your provider, as [described in the gem's README][1]
1. Save the configuration file.
1. Save the configuration file
1. Restart GitLab for the changes to take effect.
1. Restart GitLab for the changes to take effect
On the sign in page there should now be a new button below the regular sign in form.
Click the button to begin your provider's authentication process. This will direct the browser to your OAuth2 Provider's authentication page.
If everything goes well the user will be returned to your GitLab instance and will be signed in.
Click the button to begin your provider's authentication process. This will direct
the browser to your OAuth2 Provider's authentication page. If everything goes well
the user will be returned to your GitLab instance and will be signed in.
[1]: https://gitlab.com/satorix/omniauth-oauth2-generic#gitlab-config-example