[yocto] Dependencies on other file system types for custom file system type

[Eric Grunt]

Dependencies on other file system types for custom file system type

I'd like to add a custom fs type - a squashfs-xz on an ubi (instead of ubifs).
For this purpose I created a new class, inherited image_types and added
a dependency on squashfs-xz and also on squashfs-tools-native and
mtd-utils-native:

inherit image_types

IMAGE_TYPEDEP_squashfs-xz-ubi = "squashfs-xz"

do_image_squashfs-xz-ubi[depends] += "mtd-utils-native:do_populate_sysroot"
do_image_squashfs-xz-ubi[depends] += "squashfs-tools-native:do_populate_sysroot"

(full class file is attached to this mail)

But the dependency handling is not working corrently in my solution:

1. If I modify the class file inheriting image_types only (and nothing
else in the rootfs),
   the squashfs-xz is not created and thus not found.
   As a workaround, I have to call ${IMAGE_CMD_squashfs-xz} manually.

2. A symlink to the squashfs-xz image file in tmp/deploy/images/.../
   is created, no matter, if I add it to IMAGE_FSTYPES or not.
  (In comparison, if I remove ubifs, the symlink to the ubifs image
  is not created (but the ubifs image is created anyway))

    So do I need to change the way how I handle dependencies to squashfs-xz?


Thank you,

Eric
-------------- next part --------------
A non-text attachment was scrubbed...
Name: squashfs-xz-ubi.bbclass
Type: application/octet-stream
Size: 1632 bytes
Desc: not available
URL: <http://lists.yoctoproject.org/pipermail/yocto/attachments/20190412/1ac0cf8f/attachment.obj>