Can't escape '$' in --replace text

[linuskr]

What version of ripgrep are you using?

ripgrep 12.0.0
-SIMD -AVX (compiled)
+SIMD +AVX (runtime)

What operating system are you using ripgrep on?

Windows 10

Describe your question, feature request, or bug.

When using ripgrep's --replace option, '$' can't be used in the replacement text, because it is interpreted as the name of a capture group and cannot be escaped:
rg -iIN 'test([^:_$])' -r '$replacement_text$$1' outputs $1 instead of e.g. $replacement_text$!

Trying to escape the '$' does not work either:
rg -iIN 'test([^:_$])' -r '\$replacement_text\$$1' yields \\$1 instead.

[BurntSushi]

It can be escaped. Use $$ to write a literal $. It's documented here: https://docs.rs/regex/1.3.5/regex/struct.Captures.html#method.expand

It should be documented in the help text for the --replace flag though, so I'll mark this as a doc bug.

[linuskr]

Didn't think about that, thank you for the quick response and ripgrep itself.