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author | Andrew Gallant <jamslam@gmail.com> | 2016-09-23 06:56:56 -0400 |
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committer | Andrew Gallant <jamslam@gmail.com> | 2016-09-23 06:56:56 -0400 |
commit | 0ce82403d48a7283321474fbf60c966ab45f0a6b (patch) | |
tree | c12028d6046de64c8d32c0a4a23b065e715c845f /README.md | |
parent | d2f95f6e59aface5a0f3c41106f64d3b301ec9ef (diff) |
Switch over to the real README.
Diffstat (limited to 'README.md')
-rw-r--r-- | README.md | 265 |
1 files changed, 261 insertions, 4 deletions
@@ -1,6 +1,263 @@ -**UNDER DEVELOPMENT.** - ripgrep (rg) ------------ -ripgrep combines the usability of the silver searcher with the raw speed of -grep. +`ripgrep` is a command line search tool that combines the usability of The +Silver Searcher (an `ack` clone) with the raw speed of GNU grep. `ripgrep` has +first class support on Windows, Mac and Linux, with binary downloads available +for [every release](https://github.com/BurntSushi/ripgrep/releases). + +[![Linux build status](https://api.travis-ci.org/BurntSushi/ripgrep.png)](https://travis-ci.org/BurntSushi/ripgrep) +[![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). + +### Screenshot of search results + +[![A screenshot of a sample search with ripgrep](http://burntsushi.net/stuff/ripgrep1.png)](http://burntsushi.net/stuff/ripgrep1.png) + +### Quick example comparing tools + +This example searches the entire Linux kernel source tree (after running +`make defconfig && make -j8`) for `[A-Z]+_SUSPEND`, where 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`](http://blog.burntsushi.net/ripgrep/) +for a very detailed comparison with more benchmarks and analysis. + +| Tool | Command | Line count | Time | +| ---- | ------- | ---------- | ---- | +| ripgrep | `rg -n -w '[A-Z]+_SUSPEND'` | 450 | **0.245s** | +| [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 | +| [git grep](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 | +| [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 | +| [ack](http://beyondgrep.com/) | `ack -w '[A-Z]+_SUSPEND'` | 1878 | 16.952s | + +(Yes, `ack` [has](https://github.com/petdance/ack2/issues/445) a +[bug](https://github.com/petdance/ack2/issues/14).) + +### Why should I use `ripgrep`? + +* It can replace both The Silver Searcher and GNU grep because it is 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.) +* 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`, where as there are many bugs related to that functionality + 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). + +In other words, use `ripgrep` if you like speed, sane defaults, fewer bugs and +Unicode. + +### Is it really faster than everything else? + +Yes. A large number of benchmarks with detailed analysis for each is +[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. +* Uses a Chase-Lev work-stealing queue for quickly distributing work to + multiple threads. + +### Installation + +The binary name for `ripgrep` is `rg`. + +[Binaries for `ripgrep` are available for Windows, Mac and +Linux.](https://github.com/BurntSushi/ripgrep/releases) 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 Visual C++ Build +Tools](http://landinghub.visualstudio.com/visual-cpp-build-tools) +installed. + +If you're a **Homebrew** user, then you can install it with a custom formula +(N.B. `ripgrep` isn't actually in Homebrew yet. This just installs the binary +directly): + +``` +$ brew install https://raw.githubusercontent.com/BurntSushi/ripgrep/master/pkg/brew/ripgrep.rb +``` + +If you're an **Archlinux** user, then you can install `ripgrep` from the +[`ripgrep` AUR package](https://aur.archlinux.org/packages/ripgrep/), e.g., + +``` +$ yaourt -S ripgrep +``` + +If you're a **Rust programmer**, `ripgrep` can be installed with `cargo`: + +``` +$ 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 +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: `ripgrep` assumes UTF-8 *everywhere*. It +can still search files that are invalid UTF-8 (like, say, latin-1), but it will +simply not work on UTF-16 encoded files or other more exotic encodings. +[Support for other encodings may +happen.](https://github.com/BurntSushi/ripgrep/issues/1) + +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 `.rgignore` files, including in parent +directories. `.rgignore` files can be used when `.gitignore` files are +insufficient. In all cases, `.rgignore` patterns take precedence over +`.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 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`: + +``` +$ rg --type-add 'foo:*.foo,*.foobar' +``` + +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). + +### 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. +`ripgrep` compiles with Rust 1.9 (stable) or newer. Building is easy: + +``` +$ git clone git://github.com/BurntSushi/ripgrep +$ 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: + +``` +RUSTFLAGS="-C target-cpu=native" cargo build --release --features simd-accel +``` + +### Running tests + +`ripgrep` is relatively well tested, including both unit tests and integration +tests. To run the full test suite, use: + +``` +$ cargo test +``` + +from the repository root. |