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Andrew Gallant dca8110da2
ripgrep: when given no patterns, don't match
Generally speaking, ripgrep prevents the case of not having any patterns
via its arg parsing. However, it is possible for users to provide a file
of patterns via the `-f` flag. If that file is empty, then ripgrep has
nothing to search for and therefore should not ever produce any match.

One way of fixing this might be to replace the absence of patterns with
a pattern that can never match, but this still requires opening and
searching through every file, which is quite a waste. Instead, we detect
this case explicitly and quit early.

Fixes #900
2018-07-22 12:07:18 -04:00
..
2016-09-09 22:58:30 -04:00