[yocto] wic appending ".1" to a file name on multiple images build

[Alexander Kanavin]

2018-06-01 13:38 GMT+03:00 Alan Martinovic <alan.martinovic at senic.com>:
> Building them at the same time causes an issue:
>
> Traceback (most recent call lastd):
>   File "/home/alan/workspace/senic-os-dev/oe/scripts/lib/wic/filemap.py",
> line 120, in _open_image_file
>      self._f_image = open(self._image_path, 'rb')
>   FileNotFoundError: [Errno 2] No such file or directory:
> '/home/alan/workspace/senic-os-dev/build/tmp-glibc/deploy/images/senic-hub/u-boot-sunxi-with-spl.bin.1'
>
>
> The cause of the issue seems to be that `wic create`,
> even though it gets the correct file path through the
> wks file ("u-boot-sunxi-with-spl.bin")
> somewhere in the execution of wic create that
> fiile gets renamed (to "u-boot-sunxi-with-spl.bin.1")
> and results in an above issue.
>
> This only happens when the images are built in parallel,
> running each separately gives no errors.
>
> Am open for suggestions on how to approach this. :)

By applying code archaeology skills obviously, which are a must-have
for anyone involved in Yocto :)

Specifically here: where and how is self._image_path set? What are the
places in code that call into the path setter? Where do they get the
image name from? Does any of them manipulate the name and/or rename
the file and why?
Should the name include the image name to avoid such clashes and
races? And so on. :)

Alex