51 lines
2.9 KiB
Markdown
51 lines
2.9 KiB
Markdown
|
# Gitea Package Registry
|
||
|
|
|
||
|
|
This document gives a brief overview how the package registry is organized in code.
|
||
|
|
|
||
|
|
## Structure
|
||
|
|
|
||
|
|
The package registry code is divided into multiple modules to split the functionality and make code reuse possible.
|
||
|
|
|
||
|
|
| Module | Description |
|
||
|
|
| - | - |
|
||
|
|
| `models/packages` | Common methods and models used by all registry types |
|
||
|
|
| `models/packages/<type>` | Methods used by specific registry type. There should be no need to use type specific models. |
|
||
|
|
| `modules/packages` | Common methods and types used by multiple registry types |
|
||
|
|
| `modules/packages/<type>` | Registry type specific methods and types (e.g. metadata extraction of package files) |
|
||
|
|
| `routers/api/packages` | Route definitions for all registry types |
|
||
|
|
| `routers/api/packages/<type>` | Route implementation for a specific registry type |
|
||
|
|
| `services/packages` | Helper methods used by registry types to handle common tasks like package creation and deletion in `routers` |
|
||
|
|
| `services/packages/<type>` | Registry type specific methods used by `routers` and `services` |
|
||
|
|
|
||
|
|
## Models
|
||
|
|
|
||
|
|
Every package registry implementation uses the same underlaying models:
|
||
|
|
|
||
|
|
| Model | Description |
|
||
|
|
| - | - |
|
||
|
|
| `Package` | The root of a package providing values fixed for every version (e.g. the package name) |
|
||
|
|
| `PackageVersion` | A version of a package containing metadata (e.g. the package description) |
|
||
|
|
| `PackageFile` | A file of a package describing its content (e.g. file name) |
|
||
|
|
| `PackageBlob` | The content of a file (may be shared by multiple files) |
|
||
|
|
| `PackageProperty` | Additional properties attached to `Package`, `PackageVersion` or `PackageFile` (e.g. used if metadata is needed for routing) |
|
||
|
|
|
||
|
|
The following diagram shows the relationship between the models:
|
||
|
|
```
|
||
|
|
Package <1---*> PackageVersion <1---*> PackageFile <*---1> PackageBlob
|
||
|
|
```
|
||
|
|
|
||
|
|
## Adding a new package registry type
|
||
|
|
|
||
|
|
Before adding a new package registry type have a look at the existing implementation to get an impression of how it could work.
|
||
|
|
Most registry types offer endpoints to retrieve the metadata, upload and download package files.
|
||
|
|
The upload endpoint is often the heavy part because it must validate the uploaded blob, extract metadata and create the models.
|
||
|
|
The methods to validate and extract the metadata should be added in the `modules/packages/<type>` package.
|
||
|
|
If the upload is valid the methods in `services/packages` allow to store the upload and create the corresponding models.
|
||
|
|
It depends if the registry type allows multiple files per package version which method should be called:
|
||
|
|
- `CreatePackageAndAddFile`: error if package version already exists
|
||
|
|
- `CreatePackageOrAddFileToExisting`: error if file already exists
|
||
|
|
- `AddFileToExistingPackage`: error if package version does not exist or file already exists
|
||
|
|
|
||
|
|
`services/packages` also contains helper methods to download a file or to remove a package version.
|
||
|
|
There are no helper methods for metadata endpoints because they are very type specific.
|