Pre-register OAuth2 applications for git credential helpers (#26291)

This PR is an extended implementation of #25189 and builds upon the
proposal by @hickford in #25653, utilizing some ideas proposed
internally by @wxiaoguang.

Mainly, this PR consists of a mechanism to pre-register OAuth2
applications on startup, which can be enabled or disabled by modifying
the `[oauth2].DEFAULT_APPLICATIONS` parameter in app.ini. The OAuth2
applications registered this way are being marked as "locked" and
neither be deleted nor edited over UI to prevent confusing/unexpected
behavior. Instead, they're being removed if no longer enabled in config.


![grafik](81a78b1c-4b68-40a7-9e99-c272ebb8f62e)

The implemented mechanism can also be used to pre-register other OAuth2
applications in the future, if wanted.

Co-authored-by: hickford <mirth.hickford@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

---------

Co-authored-by: M Hickford <mirth.hickford@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
This commit is contained in:
Denys Konovalov 2023-08-09 14:24:07 +02:00 committed by GitHub
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@ -78,6 +78,17 @@ Gitea token scopes are as follows:
| &nbsp;&nbsp;&nbsp; **read:user** | Grants read access to user operations, such as getting user repo subscriptions and user settings. |
| &nbsp;&nbsp;&nbsp; **write:user** | Grants read/write/delete access to user operations, such as updating user repo subscriptions, followed users, and user settings. |
## Pre-configured Applications
Gitea creates OAuth applications for the following services by default on startup, as we assume that these are universally useful.
|Application|Description|Client ID|
|-----------|-----------|---------|
|[git-credential-oauth](https://github.com/hickford/git-credential-oauth)|Git credential helper|`a4792ccc-144e-407e-86c9-5e7d8d9c3269`|
|[Git Credential Manager](https://github.com/git-ecosystem/git-credential-manager)|Git credential helper|`e90ee53c-94e2-48ac-9358-a874fb9e0662`|
To prevent unexpected behavior, they are being displayed as locked in the UI and their creation can instead be controlled by the `DEFAULT_APPLICATIONS` parameter in `app.ini`.
## Client types
Gitea supports both confidential and public client types, [as defined by RFC 6749](https://datatracker.ietf.org/doc/html/rfc6749#section-2.1).