From: Derrick Stolee <dstolee@microsoft.com>
Date: Mon, 20 Aug 2018 18:24:27 +0000 (+0000)
Subject: commit-graph: not compatible with replace objects
X-Git-Tag: v2.19.2~53^2~3
X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/d6538246d3d4edbfbc9b0af6a2aa38552d35f7f1?hp=d6538246d3d4edbfbc9b0af6a2aa38552d35f7f1

commit-graph: not compatible with replace objects

Create new method commit_graph_compatible(r) to check if a given
repository r is compatible with the commit-graph feature. Fill the
method with a check to see if replace-objects exist. Test this
interaction succeeds, including ignoring an existing commit-graph and
failing to write a new commit-graph. However, we do ensure that
we write a new commit-graph by setting read_replace_refs to 0, thereby
ignoring the replace refs.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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