[yocto] Cleaning out build without re-downloading sources

[ChenQi]

On 08/22/2018 06:52 AM, Paul Sheer wrote:
> Hi,
>
> I am trying to do a clean out all packages within my build due to a
> change in my GCC environment.
>
> I updated my GCC so, for assurance reasons, I want a rebuild of everything.
>
> However I want to avoid re-downloading gigs of source packages.
>
> I am hoping there is a way, say, to restart all packages build from
> the "unpack" step without doing the download step?
>
> This seems like a common use case.  Is it supported?
>
> The only help I could find is to run commands like,
>
> bitback -C xyz abc
> bitback -c xyz abc
>
> Nothing I have tried forces a complete clean out of all builds (nor
> the other options -- a restart from the unpack step).
>
> rm -rf ./tmp   works, but it also forces a download of every package :-(
>
> Thanks
>
> Paul

There is a separate directory, which is usually downloads/ under the 
build directory, to keep downloaded git repos and tarballs.

[network]  ---> [downloads] ---> [tmp/work/xxxx]

So you don't have to worry about the downloading when you clean up tmp/.

Best Regards,
Chen Qi