From: Eric Wong <e@80x24.org>
Date: Tue, 14 May 2019 02:04:43 +0000 (+0000)
Subject: searchidx: fix incremental index with indexlevel=basic on v1
X-Git-Tag: v1.2.0~284
X-Git-Url: http://www.git.stargrave.org/?a=commitdiff_plain;h=1b7e935ab1690e28d790d8db5af2714f13c258cc;hp=1b7e935ab1690e28d790d8db5af2714f13c258cc;p=public-inbox.git

searchidx: fix incremental index with indexlevel=basic on v1

We were reindexing the full history every invocation of -index
when Xapian was not used because we were incorrectly relying on
'last_commit' metadata stored in Xapian.

Rewrite the indexing logic to be less confusing while we're
at it, since we rely on `git merge-base --is-ancestor' nowadays.

Furthermore, we need to handle message removals from the
overview index correctly when Xapian is not in use.

Co-authored-by: Eric W. Biederman <ebiederm@xmission.com>
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