Improve regex replacement.

[h0cheung]

Component(s)

pkg/ottl

Is your feature request related to a problem? Please describe.

The standard regexp in Go is sometimes powerless, which make us hard to do some replacement.

For example, I want to replaces pure number path segment in a http url. I tried to use some expression: /\d+(/|$) to /?$1.

However, if there are continuous segments, they won't be replaced at once: /12/34/56/78 -> /?/34/?/78. As positive lookahead is not supported, the only workaround I find this to replace by this expression again, but it will cause 2x cpu usage.

(/\d+){1,}(/$) can match perfectly, but I can't find a way to replace each match of (/\d+) to /?.

Describe the solution you'd like

1. Consider supporting some powerful regex engine, such as https://github.com/dlclark/regexp2. Let users choose which engine to use according to their needs.
2. Enhance the functions to replacing each match of some expression ends with {x,}

Describe alternatives you've considered

No response

Additional context

No response

[github-actions]

Pinging code owners:

• pkg/ottl: @TylerHelmuth @kentquirk @bogdandrutu @evan-bradley

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[evan-bradley]

I think it would likely make sense to offer a more powerful alternative regex engine for cases like this where the built-in Go engine isn't sufficient. We could probably add an engine or lang optional parameter to our functions to allow selecting what is used.

[TylerHelmuth]

Related to #32167

[github-actions]

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Pinging code owners:

• pkg/ottl: @TylerHelmuth @kentquirk @bogdandrutu @evan-bradley

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[github-actions]

This issue has been closed as inactive because it has been stale for 120 days with no activity.