How to enable PCRE2 when cargo installing rg?

[jugmac00]

AFAIR I did

cargo install ripgrep

When I try to use rg with pcre...

rg --pcre2 "(\b\S+\b)\s+\b\1\b"
PCRE2 is not available in this build of ripgrep

When googling the error message I found your faq entry
https://github.com/BurntSushi/ripgrep/blob/master/FAQ.md#how-do-i-use-lookaround-andor-backreferences

If you installed ripgrep through a different means (like your system's package manager), then please reach out to the maintainer of that package to see whether it's possible to enable the PCRE2 feature.

What would I need to do to get pcre support?

Thank you!

[BurntSushi]

cargo install ripgrep is just a shortcut for building the latest release of ripgrep from source. So the build instructions apply. Instead of running cargo build --release --features 'pcre2', you'd run cargo install --features 'pcre2'. (You don't need the --release flag since the install sub-command enables that automatically.)

[azzamsa]

For the newer cargo version, it is cargo install --path . --features 'pcre2'

[ltrzesniewski]

@azzamsa There's a semantic difference though:

• cargo install ripgrep --features pcre2 will install the latest released crate version
• cargo install --path . --features pcre2 will install from the source code in the current directory

[azzamsa]

Wow, I have no clue I can enable cargo features without cloning the project. TIL.
Thanks!