CODEWITHSUNDEEP
regexripgrep
Chad Baldwin
Chad Baldwin

Reputation: 2602

Exclude match if string is prefaced with another string

I have a feeling this will get closed as a duplicate as it seems like this would be a common ask...but in my defense, I have searched SO as well as Google and could not find anything.

I'm trying to search SQL files using ripgrep, but I want to exclude matches that are part of a single line SQL comment.

Match examples:

AKA, search for foobar but ignore the match if -- occurs at any point before it on that line.

I have tried things like negative lookbehinds and other methods, but I can't seem to get them to work.

This answer seemed like it would get me there: https://stackoverflow.com/a/13873003/3474677

That answer says to use (?<!grad\()vec to find matches of vec that are not prefaced with grad(. So if I translate that to my use case, I would get (?<!--)foobar. This works...but only for excluding lines that contain --foobar it does not handle the other scenarios.

Worst case scenario, I can just pipe the results from ripgrep into another filter and exclude lines that match --.*foobar but I'm hoping to find an all-in-one solution.

Upvotes: 1

Views: 2022

Answers (1)

The fourth bird
The fourth bird

Reputation: 163632

According to the comments, using ripgrep and enable --pcre2 you can use:

^(?:(?!--).)*\bfoobar\b
  • ^ Start of string
  • (?: Non capture group
    • (?!--). Negative lookahead, assert the from the current position there is not -- directly to the right. If that assertion is true, then match any character except a newline
  • )* Close the non capture group and optionally repeat it
  • \bfoobar\b Match the word foobar

See a regex demo.

Upvotes: 1

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