gitea/routers/api/packages
wxiaoguang 6b33152b7d
Decouple the different contexts from each other (#24786)
Replace #16455

Close #21803

Mixing different Gitea contexts together causes some problems:

1. Unable to respond proper content when error occurs, eg: Web should
respond HTML while API should respond JSON
2. Unclear dependency, eg: it's unclear when Context is used in
APIContext, which fields should be initialized, which methods are
necessary.


To make things clear, this PR introduces a Base context, it only
provides basic Req/Resp/Data features.

This PR mainly moves code. There are still many legacy problems and
TODOs in code, leave unrelated changes to future PRs.
2023-05-21 09:50:53 +08:00
..
alpine Add Alpine package registry (#23714) 2023-05-12 17:27:50 +00:00
cargo Implement Cargo HTTP index (#24452) 2023-05-03 16:58:43 -04:00
chef Add Debian package registry (#24426) 2023-05-02 12:31:35 -04:00
composer Add Debian package registry (#24426) 2023-05-02 12:31:35 -04:00
conan Add Debian package registry (#24426) 2023-05-02 12:31:35 -04:00
conda Add Debian package registry (#24426) 2023-05-02 12:31:35 -04:00
container Add Debian package registry (#24426) 2023-05-02 12:31:35 -04:00
debian Add Debian package registry (#24426) 2023-05-02 12:31:35 -04:00
generic Add Debian package registry (#24426) 2023-05-02 12:31:35 -04:00
goproxy Add Go package registry (#24687) 2023-05-14 23:38:40 +08:00
helm Add Debian package registry (#24426) 2023-05-02 12:31:35 -04:00
helper Implement FSFE REUSE for golang files (#21840) 2022-11-27 18:20:29 +00:00
maven Add Debian package registry (#24426) 2023-05-02 12:31:35 -04:00
npm Add Debian package registry (#24426) 2023-05-02 12:31:35 -04:00
nuget Add RPM registry (#23380) 2023-05-05 20:33:37 +00:00
pub Add Debian package registry (#24426) 2023-05-02 12:31:35 -04:00
pypi Add Debian package registry (#24426) 2023-05-02 12:31:35 -04:00
rpm Add RPM registry (#23380) 2023-05-05 20:33:37 +00:00
rubygems Add Debian package registry (#24426) 2023-05-02 12:31:35 -04:00
swift Add Debian package registry (#24426) 2023-05-02 12:31:35 -04:00
vagrant Add Debian package registry (#24426) 2023-05-02 12:31:35 -04:00
README.md Add package registry architecture overview (#23445) 2023-03-13 18:15:09 -04:00
api.go Decouple the different contexts from each other (#24786) 2023-05-21 09:50:53 +08:00

README.md

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.