Document Generic packages

Releted to
https://gitlab.com/gitlab-org/gitlab/-/issues/235492 and
https://gitlab.com/gitlab-org/gitlab/-/issues/235493.

Epic: https://gitlab.com/groups/gitlab-org/-/epics/4209.

doc/README.md

@@ -267,9 +267,7 @@ The following documentation relates to the DevOps **Package** stage:
 |:----------------------------------------------------------------|:-------------------------------------------------------|
 | [Container Registry](user/packages/container_registry/index.md)   | The GitLab Container Registry enables every project in GitLab to have its own space to store [Docker](https://www.docker.com/) images. |
 | [Dependency Proxy](user/packages/dependency_proxy/index.md) **(PREMIUM)** | The GitLab Dependency Proxy sets up a local proxy for frequently used upstream images/packages. |
-| [Conan Repository](user/packages/conan_repository/index.md) | The GitLab Conan Repository enables every project in GitLab to have its own space to store [Conan](https://conan.io/) packages. |
-| [Maven Repository](user/packages/maven_repository/index.md) | The GitLab Maven Repository enables every project in GitLab to have its own space to store [Maven](https://maven.apache.org/) packages. |
-| [NPM Registry](user/packages/npm_registry/index.md) | The GitLab NPM Registry enables every project in GitLab to have its own space to store [NPM](https://www.npmjs.com/) packages. |
+| [Package Registry](user/packages/package_registry/index.md) | Use GitLab as a private or public registry for a variety of common package managers, including [NPM](user/packages/npm_registry/index.md), [Maven](user/packages/maven_repository/index.md), [PyPI](user/packages/pypi_repository/index.md), and others. You can also store generic files. |
 
 <div align="right">
   <a type="button" class="btn btn-default" href="#overview">

doc/administration/geo/replication/datatypes.md

@@ -183,6 +183,7 @@ successfully, you must replicate their data using some other means.
 | [NuGet Repository](../../../user/packages/nuget_repository/index.md)                                           | **Yes** (13.2)                                                                     | [No](https://gitlab.com/groups/gitlab-org/-/epics/1817)   | Via Object Storage provider if supported. Native Geo support (Beta).                 | Behind feature flag `geo_package_file_replication`, enabled by default                                                                                                                                                                                                                                                     |
 | [PyPI Repository](../../../user/packages/pypi_repository/index.md)                                             | **Yes** (13.2)                                                                     | [No](https://gitlab.com/groups/gitlab-org/-/epics/1817)   | Via Object Storage provider if supported. Native Geo support (Beta).                 | Behind feature flag `geo_package_file_replication`, enabled by default                                                                                                                                                                                                                                                     |
 | [Composer Repository](../../../user/packages/composer_repository/index.md)                                     | **Yes** (13.2)                                                                     | [No](https://gitlab.com/groups/gitlab-org/-/epics/1817)   | Via Object Storage provider if supported. Native Geo support (Beta).                 | Behind feature flag `geo_package_file_replication`, enabled by default                                                                                                                                                                                                                                                     |
+| [Generic packages](../../../user/packages/generic_packages/index.md)                                | **Yes** (13.5)                                                                     | [No](https://gitlab.com/groups/gitlab-org/-/epics/1817)   | Via Object Storage provider if supported. Native Geo support (Beta).                 | Behind feature flag `geo_package_file_replication`, enabled by default                                                                                                                                                                                                                                                     |
 | [Versioned Terraform State](../../terraform_state.md)                                                          | **Yes** (13.5)                                                                     | No                                                        | Via Object Storage provider if supported. Native Geo support (Beta).                 | Behind feature flag `geo_terraform_state_version_replication`, enabled by default                                                                                                                                                                                                                                          |
 | [External merge request diffs](../../merge_request_diffs.md)                                                   | [No](https://gitlab.com/gitlab-org/gitlab/-/issues/33817)                          | No                                                        | Via Object Storage provider if supported. Native Geo support (Beta).                 |                                                                                                                                                                                                                                                                                                                            |
 | [Versioned snippets](../../../user/snippets.md#versioned-snippets)                                             | [No](https://gitlab.com/groups/gitlab-org/-/epics/2809)                            | [No](https://gitlab.com/groups/gitlab-org/-/epics/2810)   | No                                                                                   |                                                                                                                                                                                                                                                                                                                            |

doc/administration/instance_limits.md

@@ -556,6 +556,9 @@ Plan.default.actual_limits.update!(pypi_max_file_size: 100.megabytes)
 
 # For Debian Packages
 Plan.default.actual_limits.update!(debian_max_file_size: 100.megabytes)
+
+# For Generic Packages
+Plan.default.actual_limits.update!(generic_packages_max_file_size: 100.megabytes)
 ```
 
 Set the limit to `0` to allow any file size.

doc/administration/packages/index.md

@@ -21,6 +21,7 @@ The Packages feature allows GitLab to act as a repository for the following:
 | [Maven Repository](../../user/packages/maven_repository/index.md) | The GitLab Maven Repository enables every project in GitLab to have its own space to store [Maven](https://maven.apache.org/) packages. | 11.3+ |
 | [NPM Registry](../../user/packages/npm_registry/index.md)   | The GitLab NPM Registry enables every project in GitLab to have its own space to store [NPM](https://www.npmjs.com/) packages. | 11.7+ |
 | [Go Proxy](../../user/packages/go_proxy/index.md) | The Go proxy for GitLab enables every project in GitLab to be fetched with the [Go proxy protocol](https://proxy.golang.org/). | 13.1+ |
+| [Generic packages](../../user/packages/generic_packages/index.md) | Store arbitrary files, like release binaries. | 13.5+ |
 
 Don't you see your package management system supported yet?
 Please consider contributing

doc/api/README.md

@@ -167,6 +167,7 @@ to authenticate with the API:
   - [NPM Repository](../user/packages/npm_registry/index.md#authenticating-with-a-ci-job-token)
   - [Nuget Repository](../user/packages/nuget_repository/index.md)
   - [PyPI Repository](../user/packages/pypi_repository/index.md#using-gitlab-ci-with-pypi-packages)
+  - [Generic packages](../user/packages/generic_packages/index.md#publish-a-generic-package-by-using-cicd)
 - [Get job artifacts](job_artifacts.md#get-job-artifacts)
 - [Pipeline triggers](pipeline_triggers.md) (via `token=` parameter)
 - [Release creation](releases/index.md#create-a-release)

doc/development/packages.md

@@ -65,7 +65,7 @@ will have to be managed. Using instance level endpoints requires [stricter namin
 The current state of existing package registries availability is:
 
 | Repository Type  | Project Level | Group Level | Instance Level |
-|-----------------|---------------|-------------|----------------|
+|------------------|---------------|-------------|----------------|
 | Maven            | Yes           | Yes         | Yes            |
 | Conan            | Yes           | No - [open issue](https://gitlab.com/gitlab-org/gitlab/-/issues/11679) | Yes |
 | NPM              | No - [open issue](https://gitlab.com/gitlab-org/gitlab/-/issues/36853) | Yes | No - [open issue](https://gitlab.com/gitlab-org/gitlab/-/issues/36853) |
@@ -73,6 +73,7 @@ The current state of existing package registries availability is:
 | PyPI             | Yes           | No          | No             |
 | Go               | Yes           | No - [open issue](https://gitlab.com/gitlab-org/gitlab/-/issues/213900) | No - [open-issue](https://gitlab.com/gitlab-org/gitlab/-/issues/213902) |
 | Composer         | Yes           | Yes         | No             |
+| Generic | Yes           | No          | No             |
 
 NOTE: **Note:**
 NPM is currently a hybrid of the instance level and group level.

doc/user/packages/generic_packages/index.md

+---
+stage: Package
+group: Package
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
+---
+
+# GitLab Generic Packages Repository **(CORE)**
+
+> - [Introduced](https://gitlab.com/groups/gitlab-org/-/epics/4209) in GitLab 13.5.
+> - It's [deployed behind a feature flag](../../../user/feature_flags.md), disabled by default.
+> - It's disabled on GitLab.com.
+> - It's able to be enabled or disabled per-project.
+> - It's not recommended for production use.
+> - To use it in GitLab self-managed instances, ask a GitLab administrator to [enable it](#enable-or-disable-generic-packages-in-the-package-registry).
+
+CAUTION: **Warning:**
+This feature might not be available to you. Check the **version history** note above for details.
+
+Publish generic files, like release binaries, in your project’s Package Registry. Then, install the packages whenever you need to use them as a dependency.
+
+## Authenticate to the Package Registry
+
+To authenticate to the Package Registry, you need either a [personal access token](../../../api/README.md#personalproject-access-tokens)
+or [CI job token](../../../api/README.md#gitlab-ci-job-token).
+
+## Publish a package file
+
+When you publish a package file, if the package does not exist, it is created.
+
+Prerequisites:
+
+- You need to [authenticate with the API](../../../api/README.md#authentication).
+
+```plaintext
+PUT /projects/:id/packages/generic/:package_name/:package_version/:file_name
+```
+
+| Attribute          | Type            | Required | Description                                                                                                                      |
+| -------------------| --------------- | ---------| -------------------------------------------------------------------------------------------------------------------------------- |
+| `id`               | integer/string  | yes      | The ID or [URL-encoded path of the project](../../../api/README.md#namespaced-path-encoding).                                              |
+| `package_name`     | string          | yes      | The package name. It can contain only lowercase letters (`a-z`), uppercase letter (`A-Z`), numbers (`0-9`), dots (`.`), hyphens (`-`), or underscores (`_`).
+| `package_version`  | string          | yes      | The package version. It can contain only numbers (`0-9`), and dots (`.`). Must be in the format of `X.Y.Z`, i.e. should match `/\A\d+\.\d+\.\d+\z/` regular expresion.
+| `file_name`        | string          | yes      | The file name. It can contain only lowercase letters (`a-z`), uppercase letter (`A-Z`), numbers (`0-9`), dots (`.`), hyphens (`-`), or underscores (`_`).
+
+Provide the file context in the request body.
+
+Example request:
+
+```shell
+curl --header "PRIVATE-TOKEN: <your_access_token>" \
+     --upload-file path/to/file.txt \
+     https://gitlab.example.com/api/v4/projects/24/generic/my_package/0.0.1/file.txt
+```
+
+Example response:
+
+```json
+{
+  "message":"201 Created"
+}
+```
+
+## Download package file
+
+Install a package file.
+
+Prerequisites:
+
+- You need to [authenticate with the API](../../../api/README.md#authentication).
+
+```plaintext
+GET /projects/:id/packages/generic/:package_name/:package_version/:file_name
+```
+
+| Attribute          | Type            | Required | Description                                                                         |
+| -------------------| --------------- | ---------| ------------------------------------------------------------------------------------|
+| `id`               | integer/string  | yes      | The ID or [URL-encoded path of the project](../../../api/README.md#namespaced-path-encoding). |
+| `package_name`     | string          | yes      | The package name.                                                                   |
+| `package_version`  | string          | yes      | The package version.                                                                |
+| `file_name`        | string          | yes      | The file name.                                                                      |
+
+The file context is served in the response body. The response content type will be `application/octet-stream`.
+
+Example request that uses a personal access token:
+
+```shell
+curl --header "PRIVATE-TOKEN: <your_access_token>" \
+     https://gitlab.example.com/api/v4/projects/24/generic/my_package/0.0.1/file.txt
+```
+
+## Publish a generic package by using CI/CD
+
+To work with generic packages in [GitLab CI/CD](./../../../ci/README.md), you can use
+`CI_JOB_TOKEN` in place of the personal access token in your commands.
+
+For example:
+
+```yaml
+image: curlimages/curl:latest
+
+stages:
+  - upload
+  - download
+
+upload:
+  stage: upload
+  script:
+    - 'curl --header "JOB-TOKEN: $CI_JOB_TOKEN" --upload-file path/to/file.txt ${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/packages/generic/my_package/0.0.1/file.txt'
+
+download:
+  stage: download
+  script:
+    - 'wget --header="JOB-TOKEN: $CI_JOB_TOKEN" ${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/packages/generic/my_package/0.0.1/file.txt'
+```
+
+### Enable or disable generic packages in the Package Registry
+
+Support for generic packages is under development and not ready for production use. It is
+deployed behind a feature flag that is **disabled by default**.
+[GitLab administrators with access to the GitLab Rails console](../../../administration/feature_flags.md)
+can enable it.
+
+To enable it:
+
+```ruby
+# For the instance
+Feature.enable(:generic_packages)
+# For a single project
+Feature.enable(:generic_packages, Project.find(<project id>))
+```
+
+To disable it:
+
+```ruby
+# For the instance
+Feature.disable(:generic_packages)
+# For a single project
+Feature.disable(:generic_packages, Project.find(<project id>))
+```

doc/user/packages/index.md

@@ -23,6 +23,7 @@ The Package Registry supports the following formats:
 <tr><td><a href="https://docs.gitlab.com/ee/user/packages/npm_registry/index.html">NPM</a></td><td>11.7+</td></tr>
 <tr><td><a href="https://docs.gitlab.com/ee/user/packages/nuget_repository/index.html">NuGet</a></td><td>12.8+</td></tr>
 <tr><td><a href="https://docs.gitlab.com/ee/user/packages/pypi_repository/index.html">PyPI</a></td><td>12.10+</td></tr>
+<tr><td><a href="https://docs.gitlab.com/ee/user/packages/generic_packages/index.html">Generic packages</a></td><td>13.5+</td></tr>
 </table>
 </div>
 </div>

doc/user/packages/package_registry/index.md

@@ -31,7 +31,7 @@ authenticate with GitLab by using the `CI_JOB_TOKEN`.
 
 CI/CD templates, which you can use to get started, are in [this repo](https://gitlab.com/gitlab-org/gitlab/-/tree/master/lib/gitlab/ci/templates).
 
-Learn more about [using CI/CD to build Maven packages](../maven_repository/index.md#creating-maven-packages-with-gitlab-cicd), [NPM packages](../npm_registry/index.md#publishing-a-package-with-cicd), [Composer packages](../composer_repository/index.md#publish-a-composer-package-by-using-cicd), [NuGet Packages](../nuget_repository/index.md#publishing-a-nuget-package-with-cicd), [Conan Packages](../conan_repository/index.md#publish-a-conan-package-by-using-cicd), and [PyPI packages](../pypi_repository/index.md#using-gitlab-ci-with-pypi-packages).
+Learn more about [using CI/CD to build Maven packages](../maven_repository/index.md#creating-maven-packages-with-gitlab-cicd), [NPM packages](../npm_registry/index.md#publishing-a-package-with-cicd), [Composer packages](../composer_repository/index.md#publish-a-composer-package-by-using-cicd), [NuGet Packages](../nuget_repository/index.md#publishing-a-nuget-package-with-cicd), [Conan Packages](../conan_repository/index.md#publish-a-conan-package-by-using-cicd), [PyPI packages](../pypi_repository/index.md#using-gitlab-ci-with-pypi-packages), and [generic packages](../generic_packages/index.md#publish-a-generic-package-by-using-cicd).
 
 If you use CI/CD to build a package, extended activity
 information is displayed when you view the package details: