Taylor Blau 630cd5194e commit-graph.c: peel refs in 'add_ref_to_set' ...

While iterating references (to discover the set of commits to write to
the commit-graph with 'git commit-graph write --reachable'),
'add_ref_to_set' can save 'fill_oids_from_commits()' some time by
peeling the references beforehand.

Move peeling out of 'fill_oids_from_commits()' and into
'add_ref_to_set()' to use 'peel_ref()' instead of 'deref_tag()'. Doing
so allows the commit-graph machinery to use the peeled value from
'$GIT_DIR/packed-refs' instead of having to load and parse tags.

While we're at it, discard non-commit objects reachable from ref tips.
This would be done automatically by 'fill_oids_from_commits()', but such
functionality will be removed in a subsequent patch after the call to
'lookup_commit_reference_gently' is dropped (at which point a non-commit
object in the commits oidset will become an error).

Suggested-by: Jeff King <peff@peff.net>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

2020-05-13 15:20:45 -07:00

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