[OE-core] [PATCH] lib/oe/rootfs: Fix DEBUGFS generation when using opkg

[Anders Darander]

Hi,
* Richard Purdie <richard.purdie at linuxfoundation.org> [160422 15:52]:

> When enabling extra DEBUGFS image generation with opkg, errors are seen like:

> ERROR: core-image-minimal-1.0-r0 do_rootfs: Cannot get the installed packages list. Command '/media/build1/poky/build/tmp/sysroots/x86_64-linux/usr/bin/opkg -f /media/build1/poky/build/tmp/work/qemux86_64-poky-linux/core-image-minimal/1.0-r0/opkg.conf -o /media/build1/poky/build/tmp/work/qemux86_64-poky-linux/core-image-minimal/1.0-r0/rootfs  --force_postinstall --prefer-arch-to-version   status' returned 0 and stderr:
> Collected errors:
>  * file_md5sum_alloc: Failed to open file /media/build1/poky/build/tmp/work/qemux86_64-poky-linux/core-image-minimal/1.0-r0/rootfs/etc/syslog-startup.conf.busybox: No such file or directory.
>  * file_md5sum_alloc: Failed to open file /media/build1/poky/build/tmp/work/qemux86_64-poky-linux/core-image-minimal/1.0-r0/rootfs/etc/fstab: No such file or directory.

> basically for all CONFFILES in the image. This is due to the file rearranging
> the rootfs generation code does. If we preserve the /etc directory,
> the avoids the problem.

> We need to tell copyfile to preserve symlinks since some are present in /etc.

Thanks for the patch. It fixes the issue on e.g. core-image-minimal.

Unfortunately, on more complex images, we'll still fail with e.g.:

ERROR: core-image-minimal-1.0-r0 do_rootfs: Cannot get the installed packages list. Command '/mnt/cs-builds/anders/poky-play/build/tmp-glibc/sysroots/x86_64-linux/usr/bin/opkg -f /mnt/cs-builds/anders/poky-play/build/tmp-glibc/work/qemux86-oe-linux/core-image-minimal/1.0-r0/opkg.conf -o /mnt/cs-builds/anders/poky-play/build/tmp-glibc/work/qemux86-oe-linux/core-image-minimal/1.0-r0/rootfs --force_postinstall --prefer-arch-to-version   status' returned 0 and stderr:
Collected errors:
 * file_md5sum_alloc: Failed to open file /mnt/cs-builds/anders/poky-play/build/tmp-glibc/work/qemux86-oe-linux/core-image-minimal/1.0-r0/rootfs/usr/lib/ssl/openssl.cnf: No such file or directory.

I'd guess that all packages that have CONFFILES outside of /etc will
suffer from this...

I've updated #9490 with this info.

Cheers,
Anders
-- 
Anders Darander, Senior System Architect
ChargeStorm AB / eStorm AB