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ripgrep (rg)
------------
`ripgrep` is a line-oriented search tool that recursively searches your current
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directory for a regex pattern while respecting your gitignore rules. To a first
approximation, ripgrep combines the usability of The Silver Searcher (similar
to `ack`) with the raw speed of GNU grep. `ripgrep` has first class support on
Windows, macOS and Linux, with binary downloads available for
[every release](https://github.com/BurntSushi/ripgrep/releases).
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[![Linux build status](https://travis-ci.org/BurntSushi/ripgrep.svg?branch=master)](https://travis-ci.org/BurntSushi/ripgrep)
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[![Windows build status](https://ci.appveyor.com/api/projects/status/github/BurntSushi/ripgrep?svg=true)](https://ci.appveyor.com/project/BurntSushi/ripgrep)
[![](https://img.shields.io/crates/v/ripgrep.svg)](https://crates.io/crates/ripgrep)
Dual-licensed under MIT or the [UNLICENSE](http://unlicense.org).
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### CHANGELOG
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Please see the [CHANGELOG](CHANGELOG.md) for a release history.
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### Screenshot of search results
[![A screenshot of a sample search with ripgrep](http://burntsushi.net/stuff/ripgrep1.png)](http://burntsushi.net/stuff/ripgrep1.png)
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### Quick examples comparing tools
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This example searches the entire Linux kernel source tree (after running
`make defconfig && make -j8`) for `[A-Z]+_SUSPEND`, where all matches must be
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words. Timings were collected on a system with an Intel i7-6900K 3.2 GHz, and
ripgrep was compiled using the `compile` script in this repo.
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Please remember that a single benchmark is never enough! See my
[blog post on `ripgrep`](http://blog.burntsushi.net/ripgrep/)
for a very detailed comparison with more benchmarks and analysis.
| Tool | Command | Line count | Time |
| ---- | ------- | ---------- | ---- |
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| ripgrep (Unicode) | `rg -n -w '[A-Z]+_SUSPEND'` | 450 | **0.134s** |
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| [The Silver Searcher](https://github.com/ggreer/the_silver_searcher) | `ag -w '[A-Z]+_SUSPEND'` | 450 | 0.753s |
| [git grep](https://www.kernel.org/pub/software/scm/git/docs/git-grep.html) | `LC_ALL=C git grep -E -n -w '[A-Z]+_SUSPEND'` | 450 | 0.823s |
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| [git grep (Unicode)](https://www.kernel.org/pub/software/scm/git/docs/git-grep.html) | `LC_ALL=en_US.UTF-8 git grep -E -n -w '[A-Z]+_SUSPEND'` | 450 | 2.880s |
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| [sift](https://github.com/svent/sift) | `sift --git -n -w '[A-Z]+_SUSPEND'` | 450 | 3.656s |
| [The Platinum Searcher](https://github.com/monochromegane/the_platinum_searcher) | `pt -w -e '[A-Z]+_SUSPEND'` | 450 | 12.369s |
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| [ack](https://github.com/petdance/ack2) | `ack -w '[A-Z]+_SUSPEND'` | 1878 | 16.952s |
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(Yes, `ack` [has](https://github.com/petdance/ack2/issues/445) a
[bug](https://github.com/petdance/ack2/issues/14).)
Here's another benchmark 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:
| Tool | Command | Line count | Time |
| ---- | ------- | ---------- | ---- |
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| ripgrep | `rg -L -u -tc -n -w '[A-Z]+_SUSPEND'` | 404 | **0.108s** |
| [ucg](https://github.com/gvansickle/ucg) | `ucg --type=cc -w '[A-Z]+_SUSPEND'` | 392 | 0.219s |
| [GNU grep](https://www.gnu.org/software/grep/) | `egrep -R -n --include='*.c' --include='*.h' -w '[A-Z]+_SUSPEND'` | 404 | 0.733s |
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(`ucg` [has slightly different behavior in the presence of symbolic links](https://github.com/gvansickle/ucg/issues/106).)
And finally, a straight-up comparison between ripgrep and GNU grep on a single
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large file (~9.3GB,
[`OpenSubtitles2016.raw.en.gz`](http://opus.lingfil.uu.se/OpenSubtitles2016/mono/OpenSubtitles2016.raw.en.gz)):
| Tool | Command | Line count | Time |
| ---- | ------- | ---------- | ---- |
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| ripgrep | `rg -w 'Sherlock [A-Z]\w+'` | 5268 | **2.520s** |
| [GNU grep](https://www.gnu.org/software/grep/) | `LC_ALL=C egrep -w 'Sherlock [A-Z]\w+'` | 5268 | 7.143s |
In the above benchmark, passing the `-n` flag (for showing line numbers)
increases the times to `3.081s` for ripgrep and `11.403s` for GNU grep.
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### Why should I use `ripgrep`?
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* It can replace both The Silver Searcher and GNU grep because it is generally
faster than both. (N.B. It is not, strictly speaking, a "drop-in" replacement
for both, but the feature sets are far more similar than different.)
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* Like The Silver Searcher, `ripgrep` defaults to recursive directory search
and won't search files ignored by your `.gitignore` files. It also ignores
hidden and binary files by default. `ripgrep` also implements full support
for `.gitignore`, whereas there are many bugs related to that functionality
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in The Silver Searcher.
* `ripgrep` can search specific types of files. For example, `rg -tpy foo`
limits your search to Python files and `rg -Tjs foo` excludes Javascript
files from your search. `ripgrep` can be taught about new file types with
custom matching rules.
* `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).
Add support for additional text encodings. This includes, but is not limited to, UTF-16, latin-1, GBK, EUC-JP and Shift_JIS. (Courtesy of the `encoding_rs` crate.) Specifically, this feature enables ripgrep to search files that are encoded in an encoding other than UTF-8. The list of available encodings is tied directly to what the `encoding_rs` crate supports, which is in turn tied to the Encoding Standard. The full list of available encodings can be found here: https://encoding.spec.whatwg.org/#concept-encoding-get This pull request also introduces the notion that text encodings can be automatically detected on a best effort basis. Currently, the only support for this is checking for a UTF-16 bom. In all other cases, a text encoding of `auto` (the default) implies a UTF-8 or ASCII compatible source encoding. When a text encoding is otherwise specified, it is unconditionally used for all files searched. Since ripgrep's regex engine is fundamentally built on top of UTF-8, this feature works by transcoding the files to be searched from their source encoding to UTF-8. This transcoding only happens when: 1. `auto` is specified and a non-UTF-8 encoding is detected. 2. A specific encoding is given by end users (including UTF-8). When transcoding occurs, errors are handled by automatically inserting the Unicode replacement character. In this case, ripgrep's output is guaranteed to be valid UTF-8 (excluding non-UTF-8 file paths, if they are printed). In all other cases, the source text is searched directly, which implies an assumption that it is at least ASCII compatible, but where UTF-8 is most useful. In this scenario, encoding errors are not detected. In this case, ripgrep's output will match the input exactly, byte-for-byte. This design may not be optimal in all cases, but it has some advantages: 1. In the happy path ("UTF-8 everywhere") remains happy. I have not been able to witness any performance regressions. 2. In the non-UTF-8 path, implementation complexity is kept relatively low. The cost here is transcoding itself. A potentially superior implementation might build decoding of any encoding into the regex engine itself. In particular, the fundamental problem with transcoding everything first is that literal optimizations are nearly negated. Future work should entail improving the user experience. For example, we might want to auto-detect more text encodings. A more elaborate UX experience might permit end users to specify multiple text encodings, although this seems hard to pull off in an ergonomic way. Fixes #1
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* `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 `-E/--encoding` flag.)
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In other words, use `ripgrep` if you like speed, filtering by default, fewer
bugs, and Unicode support.
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### Why shouldn't I use `ripgrep`?
I'd like to try to convince you why you *shouldn't* use `ripgrep`. This should
give you a glimpse at some important downsides or missing features of
`ripgrep`.
* `ripgrep` uses a regex engine based on finite automata, so if you want fancy
regex features such as backreferences or lookaround, `ripgrep` won't provide
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them to you. `ripgrep` does support lots of things though, including, but not
limited to: lazy quantification (e.g., `a+?`), repetitions (e.g., `a{2,5}`),
begin/end assertions (e.g., `^\w+$`), word boundaries (e.g., `\bfoo\b`), and
support for Unicode categories (e.g., `\p{Sc}` to match currency symbols or
`\p{Lu}` to match any uppercase letter). (Fancier regexes will never be
supported.)
* `ripgrep` doesn't yet support searching compressed files. (Likely to be
supported in the future.)
* `ripgrep` doesn't have multiline search. (Unlikely to ever be supported.)
Add support for additional text encodings. This includes, but is not limited to, UTF-16, latin-1, GBK, EUC-JP and Shift_JIS. (Courtesy of the `encoding_rs` crate.) Specifically, this feature enables ripgrep to search files that are encoded in an encoding other than UTF-8. The list of available encodings is tied directly to what the `encoding_rs` crate supports, which is in turn tied to the Encoding Standard. The full list of available encodings can be found here: https://encoding.spec.whatwg.org/#concept-encoding-get This pull request also introduces the notion that text encodings can be automatically detected on a best effort basis. Currently, the only support for this is checking for a UTF-16 bom. In all other cases, a text encoding of `auto` (the default) implies a UTF-8 or ASCII compatible source encoding. When a text encoding is otherwise specified, it is unconditionally used for all files searched. Since ripgrep's regex engine is fundamentally built on top of UTF-8, this feature works by transcoding the files to be searched from their source encoding to UTF-8. This transcoding only happens when: 1. `auto` is specified and a non-UTF-8 encoding is detected. 2. A specific encoding is given by end users (including UTF-8). When transcoding occurs, errors are handled by automatically inserting the Unicode replacement character. In this case, ripgrep's output is guaranteed to be valid UTF-8 (excluding non-UTF-8 file paths, if they are printed). In all other cases, the source text is searched directly, which implies an assumption that it is at least ASCII compatible, but where UTF-8 is most useful. In this scenario, encoding errors are not detected. In this case, ripgrep's output will match the input exactly, byte-for-byte. This design may not be optimal in all cases, but it has some advantages: 1. In the happy path ("UTF-8 everywhere") remains happy. I have not been able to witness any performance regressions. 2. In the non-UTF-8 path, implementation complexity is kept relatively low. The cost here is transcoding itself. A potentially superior implementation might build decoding of any encoding into the regex engine itself. In particular, the fundamental problem with transcoding everything first is that literal optimizations are nearly negated. Future work should entail improving the user experience. For example, we might want to auto-detect more text encodings. A more elaborate UX experience might permit end users to specify multiple text encodings, although this seems hard to pull off in an ergonomic way. Fixes #1
2017-03-09 03:22:48 +02:00
In other words, if you like fancy regexes, searching compressed files or
multiline search, then `ripgrep` may not quite meet your needs (yet).
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### Is it really faster than everything else?
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Generally, yes. A large number of benchmarks with detailed analysis for each is
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[available on my blog](http://blog.burntsushi.net/ripgrep/).
Summarizing, `ripgrep` is fast because:
* It is built on top of
[Rust's regex engine](https://github.com/rust-lang-nursery/regex).
Rust's regex engine uses finite automata, SIMD and aggressive literal
optimizations to make searching very fast.
* 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 `.gitignore` files using a
[`RegexSet`](https://doc.rust-lang.org/regex/regex/struct.RegexSet.html).
That means a single file path can be matched against multiple glob patterns
simultaneously.
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* It uses a lock-free parallel recursive directory iterator, courtesy of
[`crossbeam`](https://docs.rs/crossbeam) and
[`ignore`](https://docs.rs/ignore).
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### Installation
The binary name for `ripgrep` is `rg`.
**[Archives of precompiled binaries for `ripgrep` are available for Windows,
macOS and Linux.](https://github.com/BurntSushi/ripgrep/releases)** Users of
platforms not explicitly mentioned below (such as Debian and Ubuntu) are advised
to download one of these archives.
Linux binaries are static executables. Windows binaries are available either as
built with MinGW (GNU) or with Microsoft Visual C++ (MSVC). When possible,
prefer MSVC over GNU, but you'll need to have the [Microsoft VC++ 2015
redistributable](https://www.microsoft.com/en-us/download/details.aspx?id=48145)
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installed.
If you're a **macOS Homebrew** or a **Linuxbrew** user,
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then you can install ripgrep either
from homebrew-core, (compiled with rust stable, no SIMD):
```
$ brew install ripgrep
```
or you can install a binary compiled with rust nightly (including SIMD and all
optimizations) by utilizing a custom tap:
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```
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$ brew tap burntsushi/ripgrep https://github.com/BurntSushi/ripgrep.git
$ brew install burntsushi/ripgrep/ripgrep-bin
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```
If you're a **Windows Chocolatey** user, then you can install `ripgrep` from the [official repo](https://chocolatey.org/packages/ripgrep):
```
$ choco install ripgrep
```
If you're an **Arch Linux** user, then you can install `ripgrep` from the official repos:
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```
$ pacman -S ripgrep
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```
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If you're a **Gentoo** user, you can install `ripgrep` from the [official repo](https://packages.gentoo.org/packages/sys-apps/ripgrep):
```
$ emerge ripgrep
```
If you're a **Fedora 24+** user, you can install `ripgrep` from [copr](https://copr.fedorainfracloud.org/coprs/carlwgeorge/ripgrep/):
```
$ dnf copr enable carlwgeorge/ripgrep
$ dnf install ripgrep
```
If you're a **RHEL/CentOS 7** user, you can install `ripgrep` from [copr](https://copr.fedorainfracloud.org/coprs/carlwgeorge/ripgrep/):
```
$ yum-config-manager --add-repo=https://copr.fedorainfracloud.org/coprs/carlwgeorge/ripgrep/repo/epel-7/carlwgeorge-ripgrep-epel-7.repo
$ yum install ripgrep
```
If you're a **Nix** user, you can install `ripgrep` from
[nixpkgs](https://github.com/NixOS/nixpkgs/blob/master/pkgs/tools/text/ripgrep/default.nix):
```
$ nix-env --install ripgrep
$ # (Or using the attribute name, which is also `ripgrep`.)
```
If you're a **Rust programmer**, `ripgrep` can be installed with `cargo`.
* Note that the minimum supported version of Rust for ripgrep is **1.17**,
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 `strip` on the binary.
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```
$ cargo install ripgrep
```
`ripgrep` isn't currently in any other package repositories.
[I'd like to change that](https://github.com/BurntSushi/ripgrep/issues/10).
### Whirlwind tour
The command-line usage of `ripgrep` doesn't differ much from other tools that
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perform a similar function, so you probably already know how to use `ripgrep`.
The full details can be found in `rg --help`, but let's go on a whirlwind tour.
`ripgrep` detects when its printing to a terminal, and will automatically
colorize your output and show line numbers, just like The Silver Searcher.
Coloring works on Windows too! Colors can be controlled more granularly with
the `--color` flag.
One last thing before we get started: generally speaking, `ripgrep` assumes the
input it is reading to be UTF-8. However, if ripgrep notices a file is encoded as
UTF-16, then it will know how to search it. For other encodings, you'll need to
explicitly specify them with the `-E/--encoding` flag.
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To recursively search the current directory, while respecting all `.gitignore`
files, ignore hidden files and directories and skip binary files:
```
$ rg foobar
```
The above command also respects all `.ignore` files, including in parent
directories. `.ignore` files can be used when `.gitignore` files are
insufficient. In all cases, `.ignore` patterns take precedence over
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`.gitignore`.
To ignore all ignore files, use `-u`. To additionally search hidden files
and directories, use `-uu`. To additionally search binary files, use `-uuu`.
(In other words, "search everything, dammit!") In particular, `rg -uuu` is
similar to `grep -a -r`.
```
$ rg -uu foobar # similar to `grep -r`
$ rg -uuu foobar # similar to `grep -a -r`
```
(Tip: If your ignore files aren't being adhered to like you expect, run your
search with the `--debug` flag.)
Make the search case insensitive with `-i`, invert the search with `-v` or
show the 2 lines before and after every search result with `-C2`.
Force all matches to be surrounded by word boundaries with `-w`.
Search and replace (find first and last names and swap them):
```
$ rg '([A-Z][a-z]+)\s+([A-Z][a-z]+)' --replace '$2, $1'
```
Named groups are supported:
```
$ rg '(?P<first>[A-Z][a-z]+)\s+(?P<last>[A-Z][a-z]+)' --replace '$last, $first'
```
Up the ante with full Unicode support, by matching any uppercase Unicode letter
followed by any sequence of lowercase Unicode letters (good luck doing this
with other search tools!):
```
$ rg '(\p{Lu}\p{Ll}+)\s+(\p{Lu}\p{Ll}+)' --replace '$2, $1'
```
Search only files matching a particular glob:
```
$ rg foo -g 'README.*'
```
<!--*-->
Or exclude files matching a particular glob:
```
$ rg foo -g '!*.min.js'
```
Search and return paths matching a particular glob (i.e., `-g` flag in ag/ack):
```
$ rg -g 'doc*' --files
```
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Search only HTML and CSS files:
```
$ rg -thtml -tcss foobar
```
Search everything except for Javascript files:
```
$ rg -Tjs foobar
```
To see a list of types supported, run `rg --type-list`. To add a new type, use
`--type-add`, which must be accompanied by a pattern for searching (`rg` won't
persist your type settings):
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```
$ rg --type-add 'foo:*.{foo,foobar}' -tfoo bar
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```
The type `foo` will now match any file ending with the `.foo` or `.foobar`
extensions.
### Regex syntax
The syntax supported is
[documented as part of Rust's regex library](https://doc.rust-lang.org/regex/regex/index.html#syntax).
### Shell completions
Shell completion files are included in the release tarball for Bash, Fish, Zsh
and PowerShell.
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For **bash**, move `complete/rg.bash-completion` to `$XDG_CONFIG_HOME/bash_completion`
or `/etc/bash_completion.d/`.
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For **fish**, move `complete/rg.fish` to `$HOME/.config/fish/completions/`.
For **PowerShell**, add `. _rg.ps1` to your PowerShell
[profile](https://technet.microsoft.com/en-us/library/bb613488(v=vs.85).aspx)
(note the leading period). If the `_rg.ps1` file is not on your `PATH`, do
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`. /path/to/_rg.ps1` instead.
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For **zsh**, move `complete/_rg` to one of your `$fpath` directories.
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### Building
`ripgrep` is written in Rust, so you'll need to grab a
[Rust installation](https://www.rust-lang.org/) in order to compile it.
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`ripgrep` compiles with Rust 1.17 (stable) or newer. Building is easy:
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```
$ git clone https://github.com/BurntSushi/ripgrep
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$ cd ripgrep
$ cargo build --release
$ ./target/release/rg --version
0.1.3
```
If you have a Rust nightly compiler, then you can enable optional SIMD
acceleration like so:
```
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RUSTFLAGS="-C target-cpu=native" cargo build --release --features 'simd-accel avx-accel'
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```
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If your machine doesn't support AVX instructions, then simply remove
`avx-accel` from the features list. Similarly for SIMD.
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### Running tests
`ripgrep` is relatively well-tested, including both unit tests and integration
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tests. To run the full test suite, use:
```
$ cargo test
```
from the repository root.
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### Tips
#### Windows Powershell
##### Powershell Profile
To customize powershell on start-up, there is a special powershell script that has to be created.
In order to find its location, type `$profile`
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See [more](https://technet.microsoft.com/en-us/library/bb613488(v=vs.85).aspx) for profile details.
Any powershell code in this file gets evaluated at the start of console.
This way you can have own aliases to be created at start.
##### Setup function alias
Often you can find a need to make alias for the favourite utility.
But powershell function aliases do not behave like your typical linux shell alias.
You always need to propagate arguments and **Stdin** input.
But it cannot be done simply as `function grep() { $input | rg.exe --hidden $args }`
Use below example as reference to how setup alias in powershell.
```powershell
function grep {
$count = @($input).Count
$input.Reset()
if ($count) {
$input | rg.exe --hidden $args
}
else {
rg.exe --hidden $args
}
}
```
Powershell special variables:
* input - is powershell **Stdin** object that allows you to access its content.
* args - is array of arguments passed to this function.
This alias checks whether there is **Stdin** input and propagates only if there is some lines.
Otherwise empty `$input` will make powershell to trigger `rg` to search empty **Stdin**
##### Piping non-ASCII content to ripgrep
When piping input into native executables in PowerShell, the encoding of the
input is controlled by the `$OutputEncoding` variable. By default, this is set
to US-ASCII, and any characters in the pipeline that don't have encodings in
US-ASCII are converted to `?` (question mark) characters.
To change this setting, set `$OutputEncoding` to a different encoding, as
represented by a .NET encoding object. Some common examples are below. The
value of this variable is reset when PowerShell restarts, so to make this
change take effect every time PowerShell is started add a line setting the
variable into your PowerShell profile.
Example `$OutputEncoding` settings:
* UTF-8 without BOM: `$OutputEncoding = [System.Text.UTF8Encoding]::new()`
* The console's output encoding:
`$OutputEncoding = [System.Console]::OutputEncoding`
If you continue to have encoding problems, you can also force the encoding
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that the console will use for printing to UTF-8 with
`[System.Console]::OutputEncoding = [System.Text.Encoding]::UTF8`. This
will also reset when PowerShell is restarted, so you can add that line
to your profile as well if you want to make the setting permanent.
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#### How do I make the output look like ag's?
Use the `--colors` flag, like so:
rg --colors line:fg:yellow \
--colors line:style:bold \
--colors path:fg:green \
--colors path:style:bold \
--colors match:fg:black \
--colors match:bg:yellow \
--colors match:style:nobold \
foo
### Known issues
#### I just hit Ctrl+C in the middle of ripgrep's output and now my terminal's foreground color is wrong!
Type in `color` in cmd.exe (Command Prompt) and `echo -ne "\033[0m"` on Unix
to restore your original foreground color.
In PowerShell, you can add the following code to your profile which will
restore the original foreground color when `Reset-ForegroundColor` is called.
Including the `Set-Alias` line will allow you to call it with simply `color`.
```powershell
$OrigFgColor = $Host.UI.RawUI.ForegroundColor
function Reset-ForegroundColor {
$Host.UI.RawUI.ForegroundColor = $OrigFgColor
}
Set-Alias -Name color -Value Reset-ForegroundColor
```
PR [#187](https://github.com/BurntSushi/ripgrep/pull/187) fixed this, and it
was later deprecated in
[#281](https://github.com/BurntSushi/ripgrep/issues/281). A full explanation is
available [here][msys issue explanation].
[msys issue explanation]: https://github.com/BurntSushi/ripgrep/issues/281#issuecomment-269093893
#### When I run `rg` it executes some other command!
It's likely that you have a shell alias or even another tool called `rg` which
is interfering with `ripgrep` — run `which rg` to see what it is.
(Notably, the `rails` plug-in for
[Oh My Zsh](https://github.com/robbyrussell/oh-my-zsh/wiki/Plugins#rails) sets
up an `rg` alias for `rails generate`.)
Problems like this can be resolved in one of several ways:
* If you're using the OMZ `rails` plug-in, disable it by editing the `plugins`
array in your zsh configuration.
* Temporarily bypass an existing `rg` alias by calling `ripgrep` as
`command rg`, `\rg`, or `'rg'`.
* Temporarily bypass an existing alias or another tool named `rg` by calling
`ripgrep` by its full path (e.g., `/usr/bin/rg` or `/usr/local/bin/rg`).
* Permanently disable an existing `rg` alias by adding `unalias rg` to the
bottom of your shell configuration file (e.g., `.bash_profile` or `.zshrc`).
* Give `ripgrep` its own alias that doesn't conflict with other tools/aliases by
adding a line like the following to the bottom of your shell configuration
file: `alias ripgrep='command rg'`