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rev-list: fallback to non-bitmap traversal when filtering

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The "--use-bitmap-index" option is usually aspirational: if we have
bitmaps and the request can be fulfilled more quickly using them we'll
do so, but otherwise fall back to a non-bitmap traversal.

The exception is object filtering, which explicitly dies if the two
options are combined. Let's convert this to the usual fallback behavior.
This is a minor convenience for now (since the caller can easily know
that --filter and --use-bitmap-index don't combine), but will become
much more useful as we start to support _some_ filters with bitmaps, but
not others.

The test infrastructure here is bigger than necessary for checking this
one small feature. But it will serve as the basis for more filtering
bitmap tests in future patches.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King
2020-02-12 21:17:30 -05:00
committed by Junio C Hamano
parent acac50dd8c
commit e03f928e2a
2 changed files with 26 additions and 2 deletions
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4
builtin/rev-list.c
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@ -521,8 +521,8 @@ int cmd_rev_list(int argc, const char **argv, const char *prefix)
if (revs.show_notes)
die(_("rev-list does not support display of notes"));
if (filter_options.choice && use_bitmap_index)
die(_("cannot combine --use-bitmap-index with object filtering"));
if (filter_options.choice)
use_bitmap_index = 0;
save_commit_buffer = (revs.verbose_header ||
revs.grep_filter.pattern_list ||