[bitbake-devel] question about BBVERSIONS OVERRIDES and PREFERRED_VERSION

[张忠山]

> Use 'bitbake test -e' to examine the overrides of var 'NAME', It is
> still not contain override for '1.1.7':
>
> #
> # $NAME [2 operations]
> #   override[develop]:set
> /home/zzs/temp/bitbake-hello-world/main/../mylayer/test.bb:10
> #     "version is develop"
> #   override[pp]:set
> /home/zzs/temp/bitbake-hello-world/main/../mylayer/test.bb:11
> #     "version is pp"
> # pre-expansion value:
> #   "version is pp"
> NAME="version is pp"
>
> Why ? I expect it should contain override for '1.1.7', like this:
>          override[1.1.7]:set
> /home/zzs/temp/bitbake-hello-world/main/../mylayer/test.bb:11
>          ....
> And I found all NAME_xxx, where xxx is [a-z] all OK? I has no idea about
> this.
> Anybody help me?
>

I found using the flowwing patch can solve my problem about override for 
'1.1.7':

============================================================
diff --git a/bitbake/lib/bb/data_smart.py b/bitbake/lib/bb/data_smart.py
index 2ab884b..216ba93 100644
--- a/bitbake/lib/bb/data_smart.py
+++ b/bitbake/lib/bb/data_smart.py
@@ -552,7 +552,7 @@ class DataSmart(MutableMapping):
          # aka pay the cookie monster
          override = var[var.rfind('_')+1:]
          shortvar = var[:var.rfind('_')]
-        while override and override.islower():
+        while override and (override + 'a').islower():
              if shortvar not in self.overridedata:
                  self.overridedata[shortvar] = []
              if [var, override] not in self.overridedata[shortvar]:

============================================================

But, I'm not sure this work for other env.

I don't know why just lower case override permited in  this function.

Version string just include digit and point is very common, but 
islower() return False for these strings.

This behavior is intended or a bug?
Or has another way to solve my problem?