[Buildroot] [PATCH 3/3] manual: Add notes about GitHub and hashes

[Yann E. MORIN <yann.morin.1998@free.fr>]

Thomas, All,

On 2014-10-26 18:08 +0100, Thomas Petazzoni spake thusly:
> On Sun, 26 Oct 2014 17:35:15 +0100, Maxime Hadjinlian wrote:
> 
> > +If +libfoo+ is from GitHub, we can only accept +.hash+ file if the
> > +package has a release section and the maintainer has uploaded a release
> > +tarball. Otherwise, the automated generated tarball may change through
> > +time, rendering a +.hash+ file invalid.
> 
> I don't really understand this. If the tarball is automatically
> generated, then it should always be the same for a given version/tag of
> a certain repository, no?

The content of the extracted archive is always the same, except for
timestamps, so, the archive is not reproducible itself.

> It would be scary if it was not possible to validate the integrity of
> all the packages we download from github.

But then that's the case for generated tarballs from github: we have
absolutely no way to check them, unless we want to have hashes for the
extracted files themselves (which I doubt we want, as it would be a
nightmare to handle).

Regards,
Yann E. MORIN.

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