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init: --dissociate option to copy objects borrowed with --reference

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"repo init --reference" has two purposes: to decrease bandwidth used
at clone time, and to decrease disk usage afterward, by using the
reference repositories as an alternate store of objects even after
the clone. The downside is that it makes the borrowing repositories
dependent on the reference repositories, so it is easy to end up
with missing objects by mistake after a cleanup operation like "git
gc".

To prevent that, v2.3.0-rc0~30^2 (clone: --dissociate option to mark
that reference is only temporary, 2014-10-14), "git clone" gained a
--dissociate option that makes --reference reuse objects from the
reference repository at clone time but copy them over instead of
using the reference as an alternate. This is more straightforward to
use than plain --reference, at the cost of higher disk usage.

Introduce a --dissociate to "repo init" that brings the same benefits
to repo. The option is simply passed on to "git clone".

Change-Id: Ib50a549eb71e0a2b3e234aea57537923962a80d4
This commit is contained in:
Nikolai Merinov
2018-10-19 15:07:05 +05:00
parent b3133a3164
commit 09f0abb0ef
3 changed files with 24 additions and 0 deletions
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@ -190,6 +190,9 @@ group.add_option('--mirror',
group.add_option('--reference',
dest='reference',
help='location of mirror directory', metavar='DIR')
group.add_option('--dissociate',
dest='dissociate', action='store_true',
help='dissociate from reference mirrors after clone')
group.add_option('--depth', type='int', default=None,
dest='depth',
help='create a shallow clone with given depth; see git clone')