[RFC PATCH 0/1] Image minimization

[claudius.heine.ext@siemens.com]

From: Claudius Heine <ch@denx.de>

Hi,

here is a RFC patch that adds a minimization extensions to images.

The basic idea behind this is that it allows to remove specific packages and
files from the root file system in a post-processing step. This is useful in
case there are tight storage space restrictions. It breaks the package
management in multiple different ways and degrees, but the main idea is to
reduce the root file system to a minimal set of files that are necessary for the
device to still perform its function.

I envision the `IMAGE_MINIMIZATION_FEATURES`, `IMAGE_MINIMIZATION_PACKAGES` and
`IMAGE_MINIMIZATION_FILES` to be the user facing interface for this.

While removing packages, I use the dpkg from the buildchroot in order to be
independent from the tools on the image. This also allows to remove dpkg while
still being able to use it.

I would like to hear some input about the general design, before I start
cleaning that up and testing it more intensively.

thanks,
Claudius

Claudius Heine (1):
  add minimization image extension

 .../recipes-core/images/isar-image-ubi.bb     |  2 +
 .../image-minimizing-extension.bbclass        | 80 +++++++++++++++++++
 meta/classes/image.bbclass                    |  1 +
 meta/classes/rootfs.bbclass                   |  3 +-
 4 files changed, 85 insertions(+), 1 deletion(-)
 create mode 100644 meta/classes/image-minimizing-extension.bbclass

-- 
2.20.1