[Buildroot] [PATCH] autobuild-run: prepare_build(): ignore directories in dldir

[Thomas Petazzoni <thomas.petazzoni@bootlin.com>]

Hello,

On Wed,  4 Apr 2018 09:07:28 +0200, Peter Korsgaard wrote:
> With the change to use subdirs in dldir, prepare_build may end up trying to
> remove a non-empty subdir, causing an exception:
> 
> Process Process-1:
> Traceback (most recent call last):
>   File "/usr/lib64/python2.7/multiprocessing/process.py", line 258, in _bootstrap
>     self.run()
>   File "/usr/lib64/python2.7/multiprocessing/process.py", line 114, in run
>     self._target(*self._args, **self._kwargs)
>   File "/home/peko/buildroot-test/scripts/autobuild-run", line 627, in run_instance
>     ret = prepare_build(**kwargs)
>   File "/home/peko/buildroot-test/scripts/autobuild-run", line 301, in prepare_build
>     os.remove(os.path.join(dldir, f))
> OSError: [Errno 21] Is a directory: 'instance-0/dl/mtools'
> 
> We only want to delete individual download files, so drop directories from
> the list of removal candidates.
> 
> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
> ---
>  scripts/autobuild-run | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/scripts/autobuild-run b/scripts/autobuild-run
> index 0f1c7d7..d2eb8a6 100755
> --- a/scripts/autobuild-run
> +++ b/scripts/autobuild-run
> @@ -293,7 +293,9 @@ def prepare_build(**kwargs):
>      # regularly re-download files to check that their upstream
>      # location is still correct.
>      for i in range(0, 5):
> -        flist = os.listdir(dldir)
> +        # ignore directories
> +        flist = [f for f in os.listdir(dldir)
> +                 if os.path.isfile(os.path.join(dldir, f))]
>          if not flist:
>              break
>          f = flist[randint(0, len(flist) - 1)]

But this is not going to remove files in sub-directories I believe, and
therefore it no longer does the job it is supposed to do. I believe we
need to switch to os.walk() to walk down in the sub-directories, no ?

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com