[Buildroot] [PATCH 1/5 v2] support/download: make hash file optional

[Arnout Vandecappelle <arnout@mind.be>]

On 17/03/15 13:59, Yann E. MORIN wrote:
> Currently, specifying a hash file for our download wrapper is mandatory.
> 
> However, when we download a git, svn, bzr, hg or cvs tree, there's by
> design no hash to check the download against.
> 
> Since we're going to have hash checking mandatory when a hash file
> exists, this would break those downloads from a repository.
> 
> So, make specifying a hash file optional when calling our download
> wrapper and bail out early from the check-hash script if no hash file is
> specified.

 An alternative approach would be to allow an empty hash in the hash file, e.g.

# From git => no hash
none xxx avrdude-eabe067c4527bc2eedc5db9288ef5cf1818ec720.tar.gz


 This has the advantage that we don't have to revert this patch in the future
when we _do_ make reproducible tarballs (which is not rocket science, the
reproducible builds people in Debian and Fedora do it). Of course, we'll be
stuck with a s*tload of hash files that have this empty hash...

 Regards,
 Arnout

-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
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