[yocto] Path to current bb-file or layer

[Svein Seldal]

On 21. sep. 2017 23:36, Richard Purdie wrote:
 > You mean like ${FILE} ?
 >
 > $ bitbake bash -e | grep ^FILE=
 > FILE="/media/build1/poky/meta/recipes-extended/bash/bash_4.4.bb"

To me ${FILE} seems to be pointing towards the receipe, and not the 
current .bbclass file as you'd expect.

If I put this in local.conf

     INHERIT += "sp-version"
     SP_BASEVERSION = "${@read_spbaseversion(d)}"

And in sp-version.bbclass:

     def read_spbaseversion(d):
         bb.warn("SVEIN FILE: ", d.getVar('FILE', False))
  	return '0'

If I do bitbake -e, I get

     WARNING: SVEIN FILE: /home/s/build-sp-image/build/conf/bblayers.conf

Later the read_spbaseversion is used from within recipe (although they 
don't need to as this variable goes into the global scope, but for the 
sake of the demonstration). Then the value being prined is:

WARNING: /home/s/build-sp-image/meta-sp/sp/sp.bb: SVEIN OPEN: 
/home/s/build-sp-image/meta-sp/sp/sp.bb

Hence, ${FILE} seems to point to the current file scope, like a recipe, 
and not any class files that the recipe might take use of.


Best regards,
Svein