Claudius Heine 503cf183b1 kas-container: make container image variables overwritable
This patch introduces new and improved ways to overwrite kas-container
variables that specify which image should be used.

`KAS_CONTAINER_IMAGE_PREFIX`: can be used to overwrite image sources.
For instance if podman is used, the default value `docker://` is used as
a prefix. But it still allows to overwrite it, by setting a custom
variable.

`KAS_CONTAINER_IMAGE_PATH`: can be used to customize the image source
path.

`KAS_CONTAINER_IMAGE_NAME`: can be set to change the container image
name.  For instance if `--isar` is used, the default value is
`kas-isar`, as with `KAS_CONTAINER_IMAGE_PREFIX` this default value can
still be overwritten by setting a custom value.

And last `KAS_IMAGE_VERSION`: It was possible to overwrite this value
before this patch and its still possible. The default value is the
current release version. Setting it for instance to `latest`, would
allow to used the most recent version of the image.

Signed-off-by: Claudius Heine <ch@denx.de>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
2020-09-29 08:35:04 +02:00
2017-06-26 09:29:07 +02:00
2020-06-17 07:59:51 +02:00
2017-06-28 15:12:15 +02:00
2020-08-20 09:17:34 +02:00
2020-09-24 13:13:12 +02:00

Setup tool for bitbake based projects
=====================================

+--------------------+
|    Build Status    |
+====================+
| |workflow-master|_ |
+--------------------+
| |workflow-next|_   |
+--------------------+

.. |workflow-master| image:: https://github.com/siemens/kas/workflows/master/badge.svg
.. _workflow-master: https://github.com/siemens/kas/actions?query=workflow%3Amaster
.. |workflow-next| image:: https://github.com/siemens/kas/workflows/next/badge.svg
.. _workflow-next: https://github.com/siemens/kas/actions?query=workflow%3Anext

This tool provides an easy mechanism to setup bitbake based
projects.

The OpenEmbedded tooling support starts at step 2 with bitbake. The
downloading of sources and then configuration has to be done by
hand. Usually, this is explained in a README. Instead kas is using a
project configuration file and does the download and configuration
phase.

Key features provided by the build tool:

- clone and checkout bitbake layers
- create default bitbake settings (machine, arch, ...)
- launch minimal build environment, reducing risk of host contamination
- initiate bitbake build process

See the `kas documentation <https://kas.readthedocs.io>`_ for further details.
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