From: Derrick Stolee <dstolee@microsoft.com>
Date: Tue, 18 Jun 2019 18:14:33 +0000 (-0700)
Subject: commit-graph: clean up chains after flattened write
X-Git-Tag: v2.23.0-rc0~38^2~4
X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/ba41112a6331e8b454cac6cfd3ee67ae93957a2c?hp=ba41112a6331e8b454cac6cfd3ee67ae93957a2c

commit-graph: clean up chains after flattened write

If we write a commit-graph file without the split option, then
we write to $OBJDIR/info/commit-graph and start to ignore
the chains in $OBJDIR/info/commit-graphs/.

Unlink the commit-graph-chain file and expire the graph-{hash}.graph
files in $OBJDIR/info/commit-graphs/ during every write.

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