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+date = "2021-10-07"
+weight = 100
+toc = true
+
+title = "How to Build Your First Image on Apertis"
++++
+
+This guide aims to explain how to build your first image on Apertis
+using the GitLab UI. A comprehensive documentation to manually build
+a customized image is available at [Image building]( {{< ref "image_building.md" >}} ).
+
+This document will explain how to create a GitLab account and
+how to use its UI and pipelines to modify and create a custom Apertis
+image.
+
+# Create a GitLab account
+
+To build your Apertis image, you first need an account on the
+[Apertis GitLab](https://gitlab.apertis.org) instance.
+
+To create one, please go on at <https://gitlab.apertis.org>, then click on `Sign in / Register`:
+
+
+
+On the next webpage, you will have a `Register now` button:
+
+
+Fill the form, then click on `Register`:
+
+
+At this step, you will have to wait until an administrator approves
+your registration:
+
+`
+You have signed up successfully. However, we could not sign you in
+because your account is awaiting approval from your GitLab administrator.
+`
+
+Once your account is approved, you will be notified through an email entitled
+`Welcome to GitLab` from `<gitlab at gitlab.apertis.org>`.
+
+The next step is to set up your account. A first useful configuration is to add
+your SSH key to be able to push/pull without having to give your
+username/password for each action.
+For this, you need to go into `Preferences`:
+
+
+Then, into the `SSH Keys` part:
+
+The instructions [to generate a new key](https://gitlab.apertis.org/help/ssh/index#generate-an-ssh-key-pair)
+or [to add an existing one](https://gitlab.apertis.org/help/ssh/index#see-if-you-have-an-existing-ssh-key-pair)
+are available.
+Please follow the relevant one to configure your SSH key.
+
+# Fork a repository
+
+It is now possible to fork a repository using the GitLab UI.
+By forking a repository, you will copy a repository under your
+GitLab namespace. That means you will be able to modify files of
+the newly forked project, and then later you can eventually do a
+`Merge request` to send your changes back to the *upstream* (or original) project.
+
+For this example, we will fork the `image-recipes-sample` example
+repository at <https://gitlab.apertis.org/demo/image-recipes-sample>.
+This repository contains a recipe to build a custom Apertis image for a
+*Raspberry Pi* board.
+
+Click on the `Fork` button:
+
+
+A form will be displayed, where you can add information regarding your fork:
+
+
+By clicking on `Fork project`, you will engage the fork process
+that it is confirmed by a message saying `Forking in progress`.
+Then, after few seconds (or minutes depending of the size of the
+repository), you will get a `The project was successfully forked`
+message.
+
+
+# Add new package to this image recipe
+
+In this example, we will add some `.deb` packages into our first customized
+Apertis image.
+
+The recipe to generate an image is a `.yaml` file that is read and
+used by [debos](https://github.com/go-debos/debos) to build the image.
+The complete syntax of the debos `.yaml` is available on its
+[GitHub repository](https://github.com/go-debos/debos)
+or you can have a look at its [manpage](https://manpages.debian.org/unstable/debos/debos.1.en.html).
+
+We will modify the `image-rpi64.yaml` file in our just forked
+`image-recipes-sample` repository. Scroll down until you see the
+`image-rpi64.yaml` file:
+
+
+Then, click on it and on the `Edit` button:
+
+
+For our example, we will add two additional `.deb` packages
+(`fonts-dejavu` and `flac`) to the image, for this we need to add the
+following section in `image-rpi64.yaml`.
+``` yaml
+ - action: apt
+ description: My additional packages
+ packages:
+ - fonts-dejavu
+ - flac
+```
+We add it at the end of all *apt* actions and before the first
+*run* action.
+The order of the different `action` parts is important because these
+are run sequentially by `debos`.
+
+
+Add the new section, a commit message and then, click on `Commit changes`.
+You should receive a `Your changes have been successfully committed`
+message.
+
+# Build an Apertis image
+
+The GitLab CI uses a recipe to build the Apertis Image.
+This is configured in the [.gitlab-ci.yml](https://gitlab.apertis.org/demo/image-recipes-sample/-/blob/main/.gitlab-ci.yml)
+file located in the root directory of the repository.
+Please refer to the official [GitLab CI documentation](https://docs.gitlab.com/ee/ci/)
+for more information.
+
+The GitLab CI pipeline will generate a new Apertis Image for
+each push (or commit through the UI) into the forked `image-recipes-sample`
+repository. If needed, it is possible to generate an image on demand by
+selecting `CI/CD`, then `Pipelines` in the sidebar.
+
+
+
+Then, click on `Run pipeline`, select on which branch the pipeline
+should be run against and eventually some variables can be defined.
+Finally, after another click on `Run pipeline`, the process will start.
+
+The progress of the building can be followed in `CI/CD`, then `Pipelines`:
+
+
+
+Once all jobs ran successfully (i.e. they should be in green),
+it is possible to download the generated image by clicking on the
+last job `apt-image-build...`.
+
+
+Then, on `Download` at the right panel:
+
+
+The image is also available from an URL, in our example we can
+download the last image built for the original `images-recipe-sample` repository at
+<https://gitlab.apertis.org/demo/image-recipes-sample/-/jobs/artifacts/main/download?job=apt-image-build-arm64-rpi64_containers-rpi64>.
+
+Please refer to these [instructions]( {{< ref "rpi4_setup.md" >}} )
+to setup and test your newly built image.
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