Re: [PATCH v7 14/14] doc/user_manual.md: Document details about deb-src caching

["vijaikumar....@gmail.com" <vijaikumar.kanagarajan@gmail.com>]

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On Wednesday, November 25, 2020 at 5:05:45 PM UTC+5:30 Jan Kiszka wrote:

> On 25.11.20 09:06, Vijai Kumar K wrote: 
> > Add details about deb-src caching. 
> > 
> > Signed-off-by: Vijai Kumar K <Vijaikumar_...@mentor.com> 
> > --- 
> > doc/user_manual.md | 25 +++++++++++++++++++++++++ 
> > 1 file changed, 25 insertions(+) 
> > 
> > diff --git a/doc/user_manual.md b/doc/user_manual.md 
> > index 8d04cd2..c0f842a 100644 
> > --- a/doc/user_manual.md 
> > +++ b/doc/user_manual.md 
> > @@ -918,3 +918,28 @@ And build the corresponding image target: 
> > ``` 
> > bitbake mc:qemuarm64-buster:isar-image-base 
> > ``` 
> > +## Cache all upstream Debian source packages in local apt 
> > + 
> > +### Motivation 
> > + 
> > +For OSS license clearance, we might need to have the sources of all 
> Debian packages we 
> > +ship with the particular image. 
>
> OSS license *compliance*: Some licenses require to provide the 
> corresponding sources code, other require copyright attributions that 
> may be best provided via the source code. In addition, you may want to 
> archive the code locally in order to ensure reproducibility (and 
> modifiability) in the future. 
>

Will include this line.
 

>
> > + 
> > +Currently the local-apt generated has only Debian binary packages. 
> Extend the local-apt 
> > +to have Debian source packages as well, for OSS clearing purposes. 
> > + 
> > +### Solution 
> > + 
> > + - Trigger download of Debian source packages as part of rootfs 
> postprocess. 
> > + 
> > +With the current base-apt implementation, we already cache all the 
> binary packages and 
> > +generate a local-apt for offline build. 
> > + 
> > +Use rootfs postprocessing to parse through the the list fo deb files in 
> ${DEDDIR} and 
> > +download the corresponding Debian source file using "apt-get source" 
> command. 
> > + 
> > +By default, the Debian source caching is not enabled. If you want to 
> cache the Debian 
> > +sources as well, as part of your image build, add the below line to 
> your local.conf file. 
> > +``` 
> > +BASE_REPO_FEATURES = "cache-deb-src" 
> > +``` 
> > 
>
> So this will fetch and and store ALL sources corresponding to the binary 
> packages that the target image installs? Or rather that any rootfs 
> installs, thus also buildchroots and sdkrootfs? Please make this clearer. 
>

Yes. Exactly. I will update the document.

Thanks,
Vijai Kumar K
 

>
> Jan 
>
> -- 
> Siemens AG, T RDA IOT 
> Corporate Competence Center Embedded Linux 
>

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