Introduction

The meta-agl layer provides the minimal set of software to boot an AGL Distribution system. You use this layer as the minimal core on which to build AGL profiles.

NOTE: The meta-agl layer does not include a reference UI. The reference UI is included as part of the meta-agl-demo layer. Furthermore, meta-agl does not include additional components, such as security, which are part of the meta-agl-extra layer.

Sub-Layers

The meta-agl layer itself contains many sub-layers and files. Following is a “tree” look at the layer:

.
├── docs
├── meta-agl
├── meta-agl-bsp
├── meta-agl-distro
├── meta-agl-profile-cluster
├── meta-agl-profile-cluster-qt5
├── meta-agl-profile-core
├── meta-agl-profile-graphical
├── meta-agl-profile-graphical-html5
├── meta-agl-profile-graphical-qt5
├── meta-agl-profile-hud
├── meta-agl-profile-telematics
├── meta-app-framework
├── meta-netboot
├── meta-security
├── README-AGL.md
├── README.md
├── scripts
├── templates

This list provides some overview information on the files and sub-layers in meta-agl:

  • docs: Contains files that support AGL documentation.
  • meta-agl: Contains layer configuration for the meta-agl layer.
  • meta-agl-bsp: Contains adaptations for recipes and required packages to boot an AGL distribution on targeted hardware and emulation (i.e. QEMU).
  • meta-agl-distro: Contains distro configuration and supporting scripts.
  • meta-agl-profile-cluster: The middleware for the AGL cluster profile. The set of packages required for AGL Cluster Distribution. Profiles include support for Wayland images.
  • meta-agl-profile-cluster-qt5: The middleware for the AGL Qt5-based cluster profile. The set of packages required for AGL Qt5-based Cluster Distribution. Profiles include support for Wayland images with Qt5.
  • meta-agl-profile-core: Configuration and recipes for the AGL core profiles.
  • meta-agl-profile-graphical: Configuration and recipes supporting graphical user interfaces.
  • meta-agl-profile-graphical-html5: Configuration and recipes supporting profiles with HTML user interface support.
  • meta-agl-profile-graphical-qt5: Configuration and recipes supporting profiles with Qt5-based user interface support.
  • meta-agl-profile-hud: Configuration and recipes supporting profiles with Head-Up-Display (HUD) support.
  • meta-agl-profile-telematics: Configuration and recipes supporting profiles with telematics support.
  • meta-app-framework: Configuration and recipes supporting the AGL Application Framework.
  • meta-netboot: Contains recipes and configuration adjustments to allow network boot through network block device (NBD) since network file system (NFS) does not support security labels.
  • meta-security: Configuration and recipes supporting security applications.
  • scripts: AGL development setup and support scripts.
  • templates: Base, feature, and machine templates used in the AGL development environment.

Packagegroups

This section describes the AGL packagegroup design:

  • packagegroup-agl-image-minimal

      packagegroup-agl-core-automotive.bb
      packagegroup-agl-core-connectivity.bb
      packagegroup-agl-core-graphics.bb
      packagegroup-agl-core-kernel.bb
      packagegroup-agl-core-multimedia.bb
      packagegroup-agl-core-navi-lbs.bb
      packagegroup-agl-core-os-commonlibs.bb
      packagegroup-agl-core-security.bb
      packagegroup-agl-core-speech-services.bb
    

    The previous list of Packagegroups are used to create the agl-image-minimal image, which is a small image just capable of allowing a device to boot.

    Subsystem should maintain packagegroup-agl-core-[subsystem].bb which should hold sufficient packages to build agl-image-minimal.

  • packagegroup-agl-image-ivi

      packagegroup-agl-ivi-automotive.bb
      packagegroup-agl-ivi-connectivity.bb
      packagegroup-agl-ivi-graphics.bb
      packagegroup-agl-ivi-kernel.bb
      packagegroup-agl-ivi-multimedia.bb
      packagegroup-agl-ivi-navi-lbs.bb
      packagegroup-agl-ivi-os-commonlibs.bb
      packagegroup-agl-ivi-security.bb
      packagegroup-agl-ivi-speech-services.bb
    

    The previous list of Packagegroups are used to create the agl-image-ivi image, which is a baseline image (i.e. Service Layer and Operating System Layer defined in AGL Spec v1.0) for the AGL profiles.

  • packagegroup-agl-test.bb

    Additional tools used in QA tests (for agl-image*-qa).