ripgrep (rg) #
ripgrep is a line-oriented search tool that recursively searches the current
directory for a regex pattern. By default, ripgrep will respect gitignore rules
and automatically skip hidden files/directories and binary files. (To disable
all automatic filtering by default, use
rg -uuu.) ripgrep has first class
support on Windows, macOS and Linux, with binary downloads available for
release. ripgrep is similar to
other popular search tools like The Silver Searcher, ack and grep.
Dual-licensed under MIT or the UNLICENSE.
Please see the CHANGELOG for a release history.
Documentation quick links #
- User Guide
- Frequently Asked Questions
- Regex syntax
- Configuration files
- Shell completions
Screenshot of search results #
Quick examples comparing tools #
This example searches the entire
Linux kernel source tree
make defconfig && make -j8) for
all matches must be words. Timings were collected on a system with an Intel
i7-6900K 3.2 GHz.
Please remember that a single benchmark is never enough! See my blog post on ripgrep for a very detailed comparison with more benchmarks and analysis.
|The Silver Searcher||
|git grep (Unicode)||
Here’s another benchmark on the same corpus as above that disregards gitignore files and searches with a whitelist instead. The corpus is the same as in the previous benchmark, and the flags passed to each command ensure that they are doing equivalent work:
And finally, a straight-up comparison between ripgrep, ugrep and GNU grep on a
single large file cached in memory
In the above benchmark, passing the
-n flag (for showing line numbers)
increases the times to
3.423s for ripgrep and
13.031s for GNU grep. ugrep
times are unaffected by the presence or absence of
Why should I use ripgrep? #
- It can replace many use cases served by other search tools because it contains most of their features and is generally faster. (See the FAQ for more details on whether ripgrep can truly replace grep.)
- Like other tools specialized to code search, ripgrep defaults to
recursive search and does
filtering. Namely, ripgrep won’t search files
ignored by your
.rgignorefiles, it won’t search hidden files and it won’t search binary files. Automatic filtering can be disabled with
- ripgrep can
search specific types of files.
rg -tpy foolimits your search to Python files and
- ripgrep supports many features found in
grep, such as showing the context of search results, searching multiple patterns, highlighting matches with color and full Unicode support. Unlike GNU grep, ripgrep stays fast while supporting Unicode (which is always on).
- ripgrep has optional support for switching its regex engine to use PCRE2.
Among other things, this makes it possible to use look-around and
backreferences in your patterns, which are not supported in ripgrep’s default
regex engine. PCRE2 support can be enabled with
-P/--pcre2(use PCRE2 always) or
--auto-hybrid-regex(use PCRE2 only if needed). An alternative syntax is provided via the
- ripgrep has rudimentary support for replacements, which permit rewriting output based on what was matched.
- ripgrep supports
searching files in text encodings
other than UTF-8, such as UTF-16, latin-1, GBK, EUC-JP, Shift_JIS and more.
(Some support for automatically detecting UTF-16 is provided. Other text
encodings must be specifically specified with the
- ripgrep supports searching files compressed in a common format (brotli,
bzip2, gzip, lz4, lzma, xz, or zstandard) with the
- ripgrep supports arbitrary input preprocessing filters which could be PDF text extraction, less supported decompression, decrypting, automatic encoding detection and so on.
- ripgrep can be configured via a configuration file.
In other words, use ripgrep if you like speed, filtering by default, fewer bugs and Unicode support.
Why shouldn’t I use ripgrep? #
Despite initially not wanting to add every feature under the sun to ripgrep, over time, ripgrep has grown support for most features found in other file searching tools. This includes searching for results spanning across multiple lines, and opt-in support for PCRE2, which provides look-around and backreference support.
At this point, the primary reasons not to use ripgrep probably consist of one or more of the following:
- You need a portable and ubiquitous tool. While ripgrep works on Windows, macOS and Linux, it is not ubiquitous and it does not conform to any standard such as POSIX. The best tool for this job is good old grep.
- There still exists some other feature (or bug) not listed in this README that you rely on that’s in another tool that isn’t in ripgrep.
- There is a performance edge case where ripgrep doesn’t do well where another tool does do well. (Please file a bug report!)
- ripgrep isn’t possible to install on your machine or isn’t available for your platform. (Please file a bug report!)
Is it really faster than everything else? #
Generally, yes. A large number of benchmarks with detailed analysis for each is available on my blog.
Summarizing, ripgrep is fast because:
- It is built on top of
Rust’s regex engine.
Rust’s regex engine uses finite automata, SIMD and aggressive literal
optimizations to make searching very fast. (PCRE2 support can be opted into
- Rust’s regex library maintains performance with full Unicode support by building UTF-8 decoding directly into its deterministic finite automaton engine.
- It supports searching with either memory maps or by searching incrementally with an intermediate buffer. The former is better for single files and the latter is better for large directories. ripgrep chooses the best searching strategy for you automatically.
- Applies your ignore patterns in
.gitignorefiles using a
RegexSet. That means a single file path can be matched against multiple glob patterns simultaneously.
- It uses a lock-free parallel recursive directory iterator, courtesy of
Feature comparison #
Note that ripgrep has grown a few significant new features recently that are not yet present in Andy’s table. This includes, but is not limited to, configuration files, passthru, support for searching compressed files, multiline search and opt-in fancy regex support via PCRE2.
The binary name for ripgrep is
Archives of precompiled binaries for ripgrep are available for Windows, macOS and Linux. Linux and Windows binaries are static executables. Users of platforms not explicitly mentioned below are advised to download one of these archives.
If you’re a macOS Homebrew or a Linuxbrew user, then you can install ripgrep from homebrew-core:
$ brew install ripgrep
If you’re a MacPorts user, then you can install ripgrep from the official ports:
$ sudo port install ripgrep
If you’re a Windows Chocolatey user, then you can install ripgrep from the official repo:
$ choco install ripgrep
If you’re a Windows Scoop user, then you can install ripgrep from the official bucket:
$ scoop install ripgrep
If you’re an Arch Linux user, then you can install ripgrep from the official repos:
$ pacman -S ripgrep
If you’re a Gentoo user, you can install ripgrep from the official repo:
$ emerge sys-apps/ripgrep
If you’re a Fedora user, you can install ripgrep from official repositories.
$ sudo dnf install ripgrep
If you’re an openSUSE user, ripgrep is included in openSUSE Tumbleweed and openSUSE Leap since 15.1.
$ sudo zypper install ripgrep
If you’re a RHEL/CentOS 7/8 user, you can install ripgrep from copr:
$ sudo yum-config-manager --add-repo=https://copr.fedorainfracloud.org/coprs/carlwgeorge/ripgrep/repo/epel-7/carlwgeorge-ripgrep-epel-7.repo $ sudo yum install ripgrep
If you’re a Nix user, you can install ripgrep from nixpkgs:
$ nix-env --install ripgrep $ # (Or using the attribute name, which is also ripgrep.)
If you’re a Guix user, you can install ripgrep from the official package collection:
$ guix install ripgrep
If you’re a Debian user (or a user of a Debian derivative like Ubuntu),
then ripgrep can be installed using a binary
.deb file provided in each
$ curl -LO https://github.com/BurntSushi/ripgrep/releases/download/13.0.0/ripgrep_13.0.0_amd64.deb $ sudo dpkg -i ripgrep_13.0.0_amd64.deb
If you run Debian Buster (currently Debian stable) or Debian sid, ripgrep is officially maintained by Debian.
$ sudo apt-get install ripgrep
If you’re an Ubuntu Cosmic (18.10) (or newer) user, ripgrep is available using the same packaging as Debian:
$ sudo apt-get install ripgrep
(N.B. Various snaps for ripgrep on Ubuntu are also available, but none of them seem to work right and generate a number of very strange bug reports that I don’t know how to fix and don’t have the time to fix. Therefore, it is no longer a recommended installation option.)
If you’re a FreeBSD user, then you can install ripgrep from the official ports:
# pkg install ripgrep
If you’re an OpenBSD user, then you can install ripgrep from the official ports:
$ doas pkg_add ripgrep
If you’re a NetBSD user, then you can install ripgrep from pkgsrc:
# pkgin install ripgrep
If you’re a Haiku x86_64 user, then you can install ripgrep from the official ports:
$ pkgman install ripgrep
If you’re a Haiku x86_gcc2 user, then you can install ripgrep from the same port as Haiku x86_64 using the x86 secondary architecture build:
$ pkgman install ripgrep_x86
If you’re a Rust programmer, ripgrep can be installed with
- Note that the minimum supported version of Rust for ripgrep is 1.65.0, although ripgrep may work with older versions.
- Note that the binary may be bigger than expected because it contains debug
symbols. This is intentional. To remove debug symbols and therefore reduce
the file size, run
stripon the binary.
$ cargo install ripgrep
ripgrep is written in Rust, so you’ll need to grab a Rust installation in order to compile it. ripgrep compiles with Rust 1.65.0 (stable) or newer. In general, ripgrep tracks the latest stable release of the Rust compiler.
To build ripgrep:
$ git clone https://github.com/BurntSushi/ripgrep $ cd ripgrep $ cargo build --release $ ./target/release/rg --version 0.1.3
If you have a Rust nightly compiler and a recent Intel CPU, then you can enable additional optional SIMD acceleration like so:
RUSTFLAGS="-C target-cpu=native" cargo build --release --features 'simd-accel'
simd-accel feature enables SIMD support in certain ripgrep dependencies
(responsible for transcoding). They are not necessary to get SIMD optimizations
for search; those are enabled automatically. Hopefully, some day, the
simd-accel feature will similarly become unnecessary. WARNING: Currently,
enabling this option can increase compilation times dramatically.
Finally, optional PCRE2 support can be built with ripgrep by enabling the
$ cargo build --release --features 'pcre2'
--features 'pcre2 simd-accel' to also include compile time SIMD
optimizations, which will only work with a nightly compiler.)
Enabling the PCRE2 feature works with a stable Rust compiler and will
attempt to automatically find and link with your system’s PCRE2 library via
pkg-config. If one doesn’t exist, then ripgrep will build PCRE2 from source
using your system’s C compiler and then statically link it into the final
executable. Static linking can be forced even when there is an available PCRE2
system library by either building ripgrep with the MUSL target or by setting
ripgrep can be built with the MUSL target on Linux by first installing the MUSL library on your system (consult your friendly neighborhood package manager). Then you just need to add MUSL support to your Rust toolchain and rebuild ripgrep, which yields a fully static executable:
$ rustup target add x86_64-unknown-linux-musl $ cargo build --release --target x86_64-unknown-linux-musl
--features flag from above works as expected. If you want to
build a static executable with MUSL and with PCRE2, then you will need to have
musl-gcc installed, which might be in a separate package from the actual
MUSL library, depending on your Linux distribution.
Running tests #
ripgrep is relatively well-tested, including both unit tests and integration tests. To run the full test suite, use:
$ cargo test --all
from the repository root.
Related tools #
delta is a syntax highlighting
pager that supports the
rg --jsonoutput format. So all you need to do to make it work is
rg --json pattern | delta. See delta’s manual section on grep for more details.
Vulnerability reporting #
For reporting a security vulnerability, please contact Andrew Gallant, which has my email address and PGP public key if you wish to send an encrypted message.
The following is a list of known translations of ripgrep’s documentation. These are unofficially maintained and may not be up to date.