populate_sdk_ext: consider custom configuration in local.conf

Copy the contents of local.conf under TOPDIR into the final generated
local.conf. In this way, custom settings are also made into the final
local.conf like IMAGE_INSTALL, DISTRO_FEATURES, VIRTUAL-RUNTIME_xxx,
etc. Comments and blank lines are filtered out.

Before this change, installing extensible SDK would usually report failure
when preparing the build system if the user has custom configuration for
DISTRO_FEATURES in local.conf. Also, items in IMAGE_INSTALL_append in
local.conf also don't get built correctly.

This patch solves the above problem by making use of bb.utils.edit_metadata.

In addition, we check to avoid any setting that might lead to host paths
bleeding into the SDK's configuration. Basically, variables with values
starting with '/' are removed. A whitelist mechanism is introduced so that
users could specify variables that should not be ignored. The name of the
whitelist is SDK_LOCAL_CONF_WHITELIST.

The SDK_META_CONF_WHITELIST is removed as it's of no use after this
change.

SDK_LOCAL_CONF_BLACKLIST can be used to prevent copying specific
variable settings to the extensible SDK's local.conf; the default is to
exclude PRSERV_HOST (since this is likely to be internal). Similarly,
SDK_INHERIT_BLACKLIST to forbit local.conf in SDK to inherit certain
classes such as 'buildhistory' or 'icecc' that would not normally make
sense in an SDK environment.

[YOCTO #7616]

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

0 files changed, 0 insertions, 0 deletions