Merge branch '219419-nuget-api-docs' into 'master'

Add NuGet API docs

See merge request gitlab-org/gitlab!57614

doc/api/packages/nuget.md

+---
+stage: Package
+group: Package
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about..example/handbook/engineering/ux/technical-writing/#assignments
+---
+
+# NuGet API
+
+This is the API documentation for [NuGet Packages](../../user/packages/nuget_repository/index.md).
+
+WARNING:
+This API is used by the [NuGet package manager client](https://www.nuget.org/)
+and is generally not meant for manual consumption.
+
+For instructions on how to upload and install NuGet packages from the GitLab
+package registry, see the [NuGet package registry documentation](../../user/packages/nuget_repository/index.md).
+
+NOTE:
+These endpoints do not adhere to the standard API authentication methods.
+See the [NuGet package registry documentation](../../user/packages/nuget_repository/index.md)
+for details on which headers and token types are supported.
+
+## Package index
+
+> Introduced in GitLab 12.8.
+
+Returns the index for a given package, which includes a list of available versions:
+
+```plaintext
+GET projects/:id/packages/nuget/download/:package_name/index
+```
+
+| Attribute      | Type   | Required | Description |
+| -------------- | ------ | -------- | ----------- |
+| `id`           | string | yes      | The ID or full path of the project. |
+| `package_name` | string | yes      | The name of the package. |
+
+```shell
+curl --user <username>:<personal_access_token> "https://gitlab.example.com/api/v4/projects/1/packages/nuget/download/MyNuGetPkg/index"
+```
+
+Example response:
+
+```json
+{
+  "versions": [
+    "1.3.0.17"
+  ]
+}
+```
+
+## Download a package file
+
+> Introduced in GitLab 12.8.
+
+Download a NuGet package file. The [metadata service](#metadata-service) provides this URL.
+
+```plaintext
+GET projects/:id/packages/nuget/download/:package_name/:package_version/:package_filename
+```
+
+| Attribute         | Type   | Required | Description |
+| ----------------- | ------ | -------- | ----------- |
+| `id`              | string | yes      | The ID or full path of the project. |
+| `package_name`    | string | yes      | The name of the package. |
+| `package_version` | string | yes      | The version of the package. |
+| `package_filename`| string | yes      | The name of the file. |
+
+```shell
+curl --user <username>:<personal_access_token> "https://gitlab.example.com/api/v4/projects/1/packages/nuget/download/MyNuGetPkg/1.3.0.17/mynugetpkg.1.3.0.17.nupkg"
+```
+
+Write the output to a file:
+
+```shell
+curl --user <username>:<personal_access_token> "https://gitlab.example.com/api/v4/projects/1/packages/nuget/download/MyNuGetPkg/1.3.0.17/mynugetpkg.1.3.0.17.nupkg" >> MyNuGetPkg.1.3.0.17.nupkg
+```
+
+This writes the downloaded file to `MyNuGetPkg.1.3.0.17.nupkg` in the current directory.
+
+## Upload a package file
+
+> Introduced in GitLab 12.8.
+
+Download a NuGet package file:
+
+```plaintext
+PUT projects/:id/packages/nuget
+```
+
+| Attribute         | Type   | Required | Description |
+| ----------------- | ------ | -------- | ----------- |
+| `id`              | string | yes      | The ID or full path of the project. |
+| `package_name`    | string | yes      | The name of the package. |
+| `package_version` | string | yes      | The version of the package. |
+| `package_filename`| string | yes      | The name of the file. |
+
+```shell
+curl --request PUT \
+     --upload-file path/to/mynugetpkg.1.3.0.17.nupkg \
+     --user <username>:<personal_access_token> \
+     "https://gitlab.example.com/api/v4/projects/1/packages/nuget"
+```
+
+## Route prefix
+
+For the remaining routes, there are two sets of identical routes that each make requests in
+different scopes:
+
+- Use the group-level prefix to make requests in a group's scope.
+- Use the project-level prefix to make requests in a single project's scope.
+
+The examples in this document all use the project-level prefix.
+
+### Group-level
+
+```plaintext
+ /groups/:id/-/packages/nuget`
+```
+
+| Attribute | Type   | Required | Description |
+| --------- | ------ | -------- | ----------- |
+| `id`      | string | yes      | The group ID or full group path. |
+
+### Project-level
+
+```plaintext
+ /projects/:id/packages/nuget`
+```
+
+| Attribute | Type   | Required | Description |
+| --------- | ------ | -------- | ----------- |
+| `id`      | string | yes      | The project ID or full project path. |
+
+## Service Index
+
+> Introduced in GitLab 12.6.
+
+Returns a list of available API resources:
+
+```plaintext
+GET <route-prefix>/index
+```
+
+Example Request:
+
+```shell
+curl --user <username>:<personal_access_token> "https://gitlab.example.com/api/v4/projects/1/packages/nuget/index"
+```
+
+Example response:
+
+```json
+{
+  "version": "3.0.0",
+  "resources": [
+    {
+      "@id": "https://gitlab.example.com/api/v4/projects/1/packages/nuget/query",
+      "@type": "SearchQueryService",
+      "comment": "Filter and search for packages by keyword."
+    },
+    {
+      "@id": "https://gitlab.example.com/api/v4/projects/1/packages/nuget/query",
+      "@type": "SearchQueryService/3.0.0-beta",
+      "comment": "Filter and search for packages by keyword."
+    },
+    {
+      "@id": "https://gitlab.example.com/api/v4/projects/1/packages/nuget/query",
+      "@type": "SearchQueryService/3.0.0-rc",
+      "comment": "Filter and search for packages by keyword."
+    },
+    {
+      "@id": "https://gitlab.example.com/api/v4/projects/1/packages/nuget/metadata",
+      "@type": "RegistrationsBaseUrl",
+      "comment": "Get package metadata."
+    },
+    {
+      "@id": "https://gitlab.example.com/api/v4/projects/1/packages/nuget/metadata",
+      "@type": "RegistrationsBaseUrl/3.0.0-beta",
+      "comment": "Get package metadata."
+    },
+    {
+      "@id": "https://gitlab.example.com/api/v4/projects/1/packages/nuget/metadata",
+      "@type": "RegistrationsBaseUrl/3.0.0-rc",
+      "comment": "Get package metadata."
+    },
+    {
+      "@id": "https://gitlab.example.com/api/v4/projects/1/packages/nuget/download",
+      "@type": "PackageBaseAddress/3.0.0",
+      "comment": "Get package content (.nupkg)."
+    },
+    {
+      "@id": "https://gitlab.example.com/api/v4/projects/1/packages/nuget",
+      "@type": "PackagePublish/2.0.0",
+      "comment": "Push and delete (or unlist) packages."
+    }
+  ]
+}
+```
+
+The URLs in the response have the same route prefix used to request them. If you request them with
+the group-level route, the returned URLs contain `/groups/:id/-`.
+
+## Metadata Service
+
+> Introduced in GitLab 12.8.
+
+Returns metadata for a package:
+
+```plaintext
+GET <route-prefix>/metadata/:package_name/index
+```
+
+| Attribute      | Type   | Required | Description |
+| -------------- | ------ | -------- | ----------- |
+| `package_name` | string | yes      | The name of the package. |
+
+```shell
+curl --user <username>:<personal_access_token> "https://gitlab.example.com/api/v4/projects/1/packages/nuget/metadata/MyNuGetPkg/index"
+```
+
+Example response:
+
+```json
+{
+  "count": 1,
+  "items": [
+    {
+      "@id": "https://gitlab.example.com/api/v4/projects/1/packages/nuget/metadata/MyNuGetPkg/1.3.0.17.json",
+      "lower": "1.3.0.17",
+      "upper": "1.3.0.17",
+      "count": 1,
+      "items": [
+        {
+          "@id": "https://gitlab.example.com/api/v4/projects/1/packages/nuget/metadata/MyNuGetPkg/1.3.0.17.json",
+          "packageContent": "https://gitlab.example.com/api/v4/projects/1/packages/nuget/download/MyNuGetPkg/1.3.0.17/helloworld.1.3.0.17.nupkg",
+          "catalogEntry": {
+            "@id": "https://gitlab.example.com/api/v4/projects/1/packages/nuget/metadata/MyNuGetPkg/1.3.0.17.json",
+            "authors": "",
+            "dependencyGroups": [],
+            "id": "MyNuGetPkg",
+            "version": "1.3.0.17",
+            "tags": "",
+            "packageContent": "https://gitlab.example.com/api/v4/projects/1/packages/nuget/download/MyNuGetPkg/1.3.0.17/helloworld.1.3.0.17.nupkg",
+            "summary": ""
+          }
+        }
+      ]
+    }
+  ]
+}
+```
+
+## Version Metadata Service
+
+> Introduced in GitLab 12.8.
+
+Returns metadata for a specific package version:
+
+```plaintext
+GET <route-prefix>/metadata/:package_name/index
+```
+
+| Attribute      | Type   | Required | Description |
+| -------------- | ------ | -------- | ----------- |
+| `package_name` | string | yes      | The name of the package. |
+
+```shell
+curl --user <username>:<personal_access_token> "https://gitlab.example.com/api/v4/projects/1/packages/nuget/metadata/MyNuGetPkg/1.3.0.17"
+```
+
+Example response:
+
+```json
+{
+  "@id": "https://gitlab.example.com/api/v4/projects/1/packages/nuget/metadata/MyNuGetPkg/1.3.0.17.json",
+  "packageContent": "https://gitlab.example.com/api/v4/projects/1/packages/nuget/download/MyNuGetPkg/1.3.0.17/helloworld.1.3.0.17.nupkg",
+  "catalogEntry": {
+    "@id": "https://gitlab.example.com/api/v4/projects/1/packages/nuget/metadata/MyNuGetPkg/1.3.0.17.json",
+    "authors": "",
+    "dependencyGroups": [],
+    "id": "MyNuGetPkg",
+    "version": "1.3.0.17",
+    "tags": "",
+    "packageContent": "https://gitlab.example.com/api/v4/projects/1/packages/nuget/download/MyNuGetPkg/1.3.0.17/helloworld.1.3.0.17.nupkg",
+    "summary": ""
+  }
+}
+```
+
+## Search Service
+
+> Introduced in GitLab 12.8.
+
+Given a query, search for NuGet packages in the repository:
+
+```plaintext
+GET <route-prefix>/query
+```
+
+| Attribute    | Type    | Required | Description |
+| ------------ | ------- | -------- | ----------- |
+| `q`          | string  | yes      | The search query. |
+| `skip`       | integer | no       | The number of results to skip. |
+| `take`       | integer | no       | The number of results to return. |
+| `prerelease` | boolean | no       | Include prerelease versions. Defaults to `true` if no value is supplied. |
+
+```shell
+curl --user <username>:<personal_access_token> "https://gitlab.example.com/api/v4/projects/1/packages/nuget/query?q=MyNuGet"
+```
+
+Example response:
+
+```json
+{
+  "totalHits": 1,
+  "data": [
+    {
+      "@type": "Package",
+      "authors": "",
+      "id": "MyNuGetPkg",
+      "title": "MyNuGetPkg",
+      "summary": "",
+      "totalDownloads": 0,
+      "verified": true,
+      "version": "1.3.0.17",
+      "versions": [
+        {
+          "@id": "https://gitlab.example.com/api/v4/projects/1/packages/nuget/metadata/MyNuGetPkg/1.3.0.17.json",
+          "version": "1.3.0.17",
+          "downloads": 0
+        }
+      ],
+      "tags": ""
+    }
+  ]
+}
+```

doc/user/packages/nuget_repository/index.md

@@ -18,6 +18,9 @@ The Package Registry works with:
 - [.NET Core CLI](https://docs.microsoft.com/en-us/dotnet/core/tools/)
 - [Visual Studio](https://visualstudio.microsoft.com/vs/)
 
+For documentation of the specific API endpoints that these
+clients use, see the [NuGet API documentation](../../../api/packages/nuget.md).
+
 ## Install NuGet
 
 The required minimum versions are: