useradd-staticids.bbclass: Simplify the logic for when to add groups
The original code was near impossible to follow, and missed a couple
of cases. For example, if one added the following line to the passwd
file specified in USERADD_UID_TABLES:
foobar:x:12345:nogroup::/:/bin/sh
and then specified the user as:
USERADD_PARAM_${PN} = "--system foobar"
one would then assume that the foobar user would be created with the
primary group set to nogroup. However, it was not (the primary group
would be foobar), and the only way to get it correct was to explicitly
add --gid nogroup to the USERADD_PARAM_${PN}.
Signed-off-by: Peter Kjellerstedt <peter.kjellerstedt@axis.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
