balena-coral repository

Clone/Initialize the repository

There are two ways of initializing this repository:

• Clone this repository with "git clone --recursive".

or

• Run "git clone" and then "git submodule update --init --recursive". This will bring in all the needed dependencies.

Build information

balenaOS currently only builds with cgroups v1. If your distribution defaults to using cgroups v2, please boot with the following kernel command line argument: systemd.unified_cgroup_hierarchy=0

Containerized build

• If you have a working docker installation, you can build in a containerized environment as follows: ./balena-yocto-scripts/build/balena-build.sh -d <device type> -s <shared directory>

  Where:

  • Device type is one of the supported devices with a valid <device type name>.coffee description file.
  • Shared directory is the absolute path to the build folder

Native build

To build all supported device types natively, please make sure your Linux distribution is supported by Yocto Project.

Additional host tools need to be installed for native builds to work.

• Run the barys build script: ./balena-yocto-scripts/build/barys

• You can also run barys with the -h switch to inspect the available options

Custom build using this repository

• Run the barys build script in dry run mode to setup an empty build directory ./balena-yocto-scripts/build/barys --remove-build --dry-run

• Edit the local.conf in the build/conf directory

• Prepare build's shell environment source layers/poky/oe-init-build-env

• Run bitbake (see message outputted when you sourced above for examples)

Build flags

• Consult layers/meta-balena/README.md for info on various build flags (setting up serial console support for example) and build prerequisites. Build flags can be set by using the build scripts (barys or balena-build) or by manually modifying local.conf.

Contributing

Issues

For issues we use an aggregated github repository available here. When you create issue make sure you select the right labels.

Pull requests

To contribute send github pull requests targeting this repository.

Please refer to: Yocto Contribution Guidelines and try to use the commit log format as stated there. Example:

<component>: Short description

I'm going to explain here what my commit does in a way that history
would be useful.

Changelog-entry: User facing description of the issue
Signed-off-by: Joe Developer <joe.developer@example.com>

The header of each commit must not exceed 72 characters in length and must be in 1 line only.

The header and the subject of each commit must be separated by an empty line.

The subject of each commit must not exceed 72 characters per line and can be wrapped to several lines.

The subject and the footer of each commit must be separated by an empty line.

Every pull request must contain at least one commit annotated with the Changelog-entry footer. The messages contained in these footers will be used to automatically fill the changelog on every new version.

Also, every update to meta-balena should be separated into its own commit, if the body of that commit contains the following line Updated meta-balena from X to Y the generated changelog will include a button to show all the updates in meta-balena from the version after X to Y.

An example of a valid commit updating meta-balena is:

layers/meta-balena: Update to v2.45.1

Update meta-balena from 2.45.0 to 2.45.1

Changelog-entry: Update the meta-balena submodule from v2.45.0 to v2.45.1

Make sure you mention the issue addressed by a PR. See:

• https://help.github.com/articles/autolinked-references-and-urls/#issues-and-pull-requests
• https://help.github.com/articles/closing-issues-via-commit-messages/#closing-an-issue-in-a-different-repository