[yocto] [EXTERNAL] Patch a package with condition

[Smith, Virgil (US)]

While you cannot *enforce* a change for one package/in another recipe file based on whether another package is included in an image, you can have recipes (and their bbappends) respond to configuration settings.  Two such mechanisms are FEATURES and OVERRIDES.  In this particular case I would probably use EXTRA_IMAGE_FEATURES from local.conf (or maybe DISTRO_FEATURES or IMAGE_FEATURES directly if making a distro or an image recipe).

https://www.yoctoproject.org/docs/latest/mega-manual/mega-manual.html#usingpoky-extend-customimage-imagefeatures

https://www.yoctoproject.org/docs/latest/mega-manual/mega-manual.html#var-FEATURE_PACKAGES

In your example Package-B.bb do something like (needs testing, search the manual for similar snippets, …)
SRC_URI_append = "${@bb.utils.contains('IMAGE_FEATURES', 'myfeature', ' file://0001-add-new-line.patch', '', d)}"


Again this won’t ‘fix’ Package-A if someone just directly adds Package-B to IMAGE_INSTALL or otherwise directly or indirectly “does it the wrong way”, but you can create a “right way” for yourself/team.


Virgil Smith
FLIR Detection, Stillwater OK, 405.372.9535 x11158

From: yocto-bounces at yoctoproject.org <yocto-bounces at yoctoproject.org> On Behalf Of PRASANTH R
Sent: Friday, September 13, 2019 0:55
To: yocto at yoctoproject.org
Subject: [EXTERNAL] [yocto] Patch a package with condition

Hi,

I need to patch my custom recipe, let say "Package-A.bb" in which I need to add a patch to the test recipe if the yocto build has a specific package like let's say if "Package-B" is available patch should be applied for Package-A.bb
I am trying with below step in Package-A.bb
SRC_URI_append_Package-B = " file://0001-add-new-line.patch"

But it doesn't work, I could see this SRC_URI_append_* works only for some specific tokens like board name, Architecture, library or native-class as such

Have u come across the scenario to make a dependency in patching with reference to another package? which way I can use this?

Thanks,



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