On Sun, 2020-11-22 at 19:16 -0700, Michael Callahan wrote:
> I am having trouble with sstate caching of my os-release.bbappend and
> am stuck. The simple example file looks like something below, where
> I
> am setting a variable from a computed python function. What's the
> magic
> to make the find_version(d) always run but do_compile to only run if
> VERSION changes? I basically want something like
> `find_version[nostamp]="1"` but that seems to only work for tasks.
>
> def find_version(d):
> import subprocess
> cmd = "git describe --long"
> return subprocess.check_output(cmd).rstrip().decode('utf-8')
>
> VERSION = "${@find_version(d)}"
> # do_compile uses $VERSION
If you set BB_DONT_CACHE = "1" in the recipe, it will force the recipe
to reparse each time. That should cause it to rerun find_version and
then change hash when the value changes. Its how SRCREV = "${AUTOREV}"
works behind the scenes.
Cheers,
Richard
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