[yocto] Shared DL_DIR with other users

[Paul Eggleton]

Hi Simon,

On Tuesday 26 March 2013 14:37:36 Vanveerdeghem, Simon wrote:
> We are using Yocto with a couple of users, to prevent that our build
> server has duplicates of downloads, we share the DL_DIR.
> 
> But we have problems with permissions. When a user run yocto, it will
> checkout sources, or download tar files with permissions 644 with the
> username of the user who is running yocto.
> 
> When another user will do a cleanall of a bitbake recipe, yocto will
> remove the tarball and the svn workingcopy, but because the permissions
> aren't 777 It cannot remove all the files (yocto doesn't throw an error
> here).
> 
> When that other user will do a fetch of thqt recipe, yocto will checkout
> the svn directory, it will leave as good as clean because it says
> internally "Skipped ." (yocto doesn't throw an error here) then it wil
> take a tarball of it, again the tarball has only a directory named of
> the checked out module, but have no sources. (yocto doesn't throw an
> error here)
> 
> When yocto will building the sources it will fail because the tar was
> clean, and there is nothing to build.
> 
> The rootcause of this problem is that the shared download directory only
> use 644. (We can workaround this with the .profile (we can set in the
> .profile a standard permission mask, but then you always use that mask,
> something we don't want)

It's likely that sharing DL_DIR directly between multiple users is not a
heavily tested scenario. One way around it which is fairly widely used 
though is to set up a local mirror shared by all of the build machines
and keep DL_DIR separate on each machine. There is some information on
how to do that here:

https://wiki.yoctoproject.org/wiki/How_do_I#Q:_How_do_I_create_my_own_source_download_mirror_.3F

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre