[Buildroot] [PATCH 1/3 v2] support/download: teach dl-wrapper to handle more than one hash file

[Peter Korsgaard]

>>>>> "Yann" == Yann E MORIN <yann.morin.1998 at free.fr> writes:

 > Currently, we expect and only use hash files that lie within the package
 > directory, alongside the .mk file. Those hash files are thus bundeld
 > with Buildroot.

 > This implies that only what's known to Buildroot can ever get into those
 > hash files. For packages where the version is fixed (or a static
 > choice), then we can carry hashes for those known versions.

 > However, we do have a few packages for which the version is a free-form
 > entry, where the user can provide a custom location and/or version. like
 > a custom VCS tree and revision, or a custom tarball URL. This means that
 > Buildroot has no way to be able to cary hashes for such custom versions.

 > This means that there is no integrity check that what was downloaded is
 > what was expected. For a sha1 in a git tree, this is a minor issue,
 > because the sha1 by itself is already a hash of the expected content.
 > But for custom tarballs URLs, or for a tag in a VCS, there is indeed no
 > integrity check.

 > Buildroot can't provide such hashes, but interested users may want to
 > provide those, and currently there is no (easy) way to do so.

 > So, we need our download helpers to be able to accept more than one hash
 > file to lookup for hashes.

 > Extend the dl-wrapper and the check-hash helpers thusly, and update the
 > legal-info accordingly.

 > Note that, to be able to pass more than one hash file, we also need to
 > re-order the arguments passed to support/download/check-hash, which also
 > impies some shuffling in the three places it is called:
 >   - 2 in dl-wrapper
 >   - 1 in the legal-info infra

 > That in turn also requires that the legal-license-file macro args get
 > re-ordered to have the hash file last; we take the opportunity to also
 > move the HOST/TARGET arg to be first, like in the other legal-info
 > macros.

 > Reported-by: "Martin Zeiser (mzeiser)" <mzeiser at cisco.com>
 > Signed-off-by: Yann E. MORIN <yann.morin.1998 at free.fr>
 > Cc: Peter Korsgaard <peter at korsgaard.com>

 > ---
 > Changes v1 -> v2:
 >   - restore legal-info  (Peter K.)

Committed, thanks.

-- 
Bye, Peter Korsgaard