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Introduce alternative archive format

Arnout Vandecappelle buildroot 1 version New

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Cover letter [Buildroot] [PATCH 0/5] Introduce alternative archive format
Quoted 7 lines · J?r?me Pouiller

Hello,

As suggested by Arnout [1], this series provide an alternative archive format. This new format contains a shallowed version of upstream repository. This format is a little bigger and a little longer to create but it allow a better workflow with upstream. I describe some good practice in patch 2.

The use case I had in mind with [1] was not so much working with upstream (for
that, OVERRIDE_SRCDIR is much more appropriate), but rather to make it cheaper to get different upstream versions. Particularly for linux repositories, if you downloaded one of them, you can reuse a large part of it when you get another version. When you can do a shallow clone there is often not so much to gain from that, but in many of our defconfigs a shallow clone is not possible because we specify a sha. In that case, an incremental download really saves a lot of time.

Regards,
Arnout

Quoted 26 lines

Notice projects hosted by github don't yet benefit of this feature since I have not found any elegant way to do it :-(.

During my tests, I have noticed current shallow clone is mostly broken (at least with git < 2.5 [2]). Indeed, shallow clone only work with symbolic references (HEAD, a tag or a branch). However, we avoid use of symbolic references in VERSION.

[1] http://lists.busybox.net/pipermail/buildroot/2015-November/144296.html
[2] http://stackoverflow.com/a/30701724/301717

J?r?me Pouiller (5):
pkg-download: do not test SITE_METHOD
download/git: allow to create archives containing shallowed git repos
pkg-generic: allow to populate build directory from a git archive
pkg-generic: provide an option to use git archives
pkg-generic: tag sources if git is used

 Config.in               | 13 +++++++++++
 package/pkg-download.mk |  7 +-----
 package/pkg-generic.mk  | 60 ++++++++++++++++++++++++++++++++++---------------
 support/download/git    | 30 ++++++++++++++++++++++---
 4 files changed, 83 insertions(+), 27 deletions(-)
Signature · 6 lines
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7493 020B C7E3 8618 8DEC 222C 82EB F404 F9AC 0DDF

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