Yocto Recipe - Override python module version

Question

I've created a layer to install some python modules, but some of them are already included in a third party layer I need (meta-openembedded). The version of python modules installed by the other layer is lower than that I need. I changed my layer priority, and I set it higher than that of the other layer. I tried to do the build, but the installed python modules version is still that of meta-openembedded layer.

If I execute bitbake-layers show-layers my custom layer has a higher priority.

Is there something else I need to do?

Here my layer structure:

meta-chiarini
├── conf
│   └── layer.conf <---- (BBFILE_PRIORITY_meta-one = "10")
├── recipes-python
│   └── paho-mqtt
│       └── python3-paho-mqtt_1.6.1.bb

Here my layer.conf:

# We have a conf and classes directory, add to BBPATH
BBPATH .= ":${LAYERDIR}"

# We have recipes-* directories, add to BBFILES
BBFILES += "${LAYERDIR}/recipes-*/*/*.bb \
            ${LAYERDIR}/recipes-*/*/*.bbappend"

BBFILE_COLLECTIONS += "meta-chiarini"
BBFILE_PATTERN_meta-chiarini = "^${LAYERDIR}/"
BBFILE_PRIORITY_meta-chiarini = "10"

LAYERDEPENDS_meta-chiarini = "core"
LAYERSERIES_COMPAT_meta-chiarini = "dunfell"

Here python3-paho-mqtt_1.6.1.bb:

SUMMARY = "MQTT version 5.0/3.1.1 client class"
HOMEPAGE = "http://eclipse.org/paho"
AUTHOR = "Roger Light <roger@atchoo.org>"
LICENSE = "Eclipse Public License v2.0"
LIC_FILES_CHKSUM = "file://LICENSE.txt;md5=8e5f264c6988aec56808a3a11e77b913"

SRC_URI = "https://files.pythonhosted.org/packages/f8/dd/4b75dcba025f8647bc9862ac17299e0d7d12d3beadbf026d8c8d74215c12/paho-mqtt-1.6.1.tar.gz"
SRC_URI[md5sum] = "bdb20f88db291fdb4a0fe804c0f29316"
SRC_URI[sha256sum] = "2a8291c81623aec00372b5a85558a372c747cbca8e9934dfe218638b8eefc26f"

S = "${WORKDIR}/paho-mqtt-1.6.1"

RDEPENDS_${PN} = ""

inherit setuptools3

Answer 1

Generally when working with multiple versions of one recipe, here is the idea:

• If the two layers have the same priority, bitbake chooses the highest version in the two layers
• If one of the layers is higher, bitbake chooses the highest version in the highest priority layer

If you want to force a particular version:

PREFERRED_VERSION_<recipe> = "<version>"

NOTE: Make sure that the recipes have the same name in <name>_<version>.bb

Here is an example:

meta-one
├── conf
│   └── layer.conf <---- (BBFILE_PRIORITY_meta-one = "7")
├── recipes-one
│   └── one
│       └── one_1.0.bb
├── recipes-one-one
│   └── one
│       └── one_2.0.bb

meta-two
├── conf
│   └── layer.conf <---- (BBFILE_PRIORITY_meta-two = "8")
├── recipes-one
│   └── one
│       └── one_3.0.bb

meta-two has the highest priority, so when I run:

bitbake -s | grep ^one

output is:

one                 :3.0-r0

• Changing them to the same priority gives the same output.
• Changing meta-one to be higher (9) gives the highest version in meta-one:

one                 :2.0-r0

Even if it selects automatically the highest version, you can still select a minor version manually:

PREFERRED_VERSION_one = "1.0"

again, bitbake -s | grep one gives:

one                 :2.0-r0                  :1.0-r0
                       ^                        ^
                       |                        |
(you have 2.0 as       |                        |
 highest version) ------                        |
                                                |
(but you selected 1.0) --------------------------

Now, changing the two layers to the same priority with the selection of 1.0 should shows that you have 3.0 as highest version but you selected 1.0:

one                 :3.0-r0                  :1.0-r0

NOTE:

• The placement of the recipe in each layer is not important to be the same path as:
  • meta-one/recipes-one/one
  • meta-two/recipes-one/one

it is just recommended for readability and organization.

The most important thing is the recipe name matching:

• Main recipe: one_1.0.bb
• one_2.0.bb (OK)
• onee_2.0.bb (NOK, Other entire recipe)

Answer 2

Using command bitbake -s | grep paho-mqtt I got a log with the issue. The License value added in python3-paho-mqtt_1.6.1.bb wasn't using the right format.

So I've changed:

LICENSE = "Eclipse Public License v2.0"

to:

LICENSE = "EPL-2.0 | EDL-1.0"

I used pipoe to generate .bb files, and it did't found the right license format, so I've added it manually, but without using the short format.