mirror of https://github.com/sharkdp/bat.git
228 lines
6.0 KiB
Markdown
228 lines
6.0 KiB
Markdown
<p align="center">
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<img src="doc/logo-header.svg" alt="bat - a cat clone with wings"><br>
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<a href="https://travis-ci.org/sharkdp/bat"><img src="https://travis-ci.org/sharkdp/bat.svg?branch=master" alt="Build Status"></a>
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<img src="https://img.shields.io/crates/l/bat.svg" alt="license">
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<a href="https://crates.io/crates/bat"><img src="https://img.shields.io/crates/v/bat.svg?colorB=319e8c" alt="Version info"></a><br>
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A <i>cat(1)</i> clone with syntax highlighting and Git integration.
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</p>
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<p align="center">
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<a href="#syntax-highlighting">Key Features</a> •
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<a href="#how-to-use">How To Use</a> •
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<a href="#installation">Installation</a> •
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<a href="#customization">Customization</a> •
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<a href="#project-goals-and-alternatives">Project goals, alternatives</a>
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</p>
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### Syntax highlighting
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`bat` supports syntax highlighting for a large number of programming and markup
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languages:
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### Git integration
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`bat` communicates with `git` to show modifications with respect to the index
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(see left side bar):
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### Automatic paging
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`bat` can pipe its own output to `less` if the output is too large for one screen.
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### File concatenation
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Oh.. you can also use it to concatenate files :wink:. Whenever
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`bat` detects a non-interactive terminal, it will fall back to printing
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the plain file contents.
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## How to use
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Display a single file on the terminal
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```bash
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> bat README.md
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```
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Display multiple files at once
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```bash
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> bat src/*.rs
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```
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Read from stdin, explicitly specify the language
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```bash
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> yaml2json .travis.yml | json_pp | bat -l json
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```
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```bash
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> curl -s https://raw.githubusercontent.com/sharkdp/bat/master/src/main.rs | bat -l rs
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```
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As a replacement for `cat`:
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```bash
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bat > note.md # quickly create a new file
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bat header.md content.md footer.md > document.md
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bat -n main.rs # show line numbers (only)
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bat f - g # output 'f', then stdin, then 'g'.
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```
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## Installation
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### From binaries
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Check out the [Release page](https://github.com/sharkdp/bat/releases) for
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binary builds and Debian packages.
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#### On Arch Linux
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You can install via Pacman:
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```bash
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pacman -S bat
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```
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#### On FreeBSD
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You can install a precompiled [`bat` package](https://www.freshports.org/textproc/bat) with pkg:
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```bash
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pkg install bat
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```
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or build it on your own from the FreeBSD ports:
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```bash
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cd /usr/ports/textproc/bat
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make install
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```
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#### On macOS
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You can install `bat` with [Homebrew](http://braumeister.org/formula/bat):
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```bash
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brew install bat
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```
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### From source
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If you want to build to compile `bat` from source, you need Rust 1.26 or
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higher. You can then use `cargo` to build everything:
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```bash
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cargo install bat
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```
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On macOS, you might have to install `cmake` (`brew install cmake`) in order for
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some dependencies to be built.
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## Customization
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### Highlighting theme
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Use `bat --list-themes` to get a list of all available themes for syntax
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highlighting. To select the `TwoDark` theme, call `bat` with the
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`--theme=TwoDark` option or set the `BAT_THEME` environment variable to
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`TwoDark`. Use `export BAT_THEME="TwoDark"` in your shells startup file to
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make the change permanent.
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### Output style
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You can use the `--style` option to control the appearance of `bat`s output.
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You can use `--style=numbers,changes`, for example, to show only Git changes
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and line numbers but no grid and no file header.
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### Adding new syntaxes / language definitions
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`bat` uses the excellent [`syntect`](https://github.com/trishume/syntect/)
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library for syntax highlighting. `syntect` can read any
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[Sublime Text `.sublime-syntax` file](https://www.sublimetext.com/docs/3/syntax.html)
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and theme. To add new syntax definitions, do the following.
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Create a folder with syntax definition files:
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```bash
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BAT_CONFIG_DIR="$(bat cache --config-dir)"
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mkdir -p "$BAT_CONFIG_DIR/syntaxes"
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cd "$BAT_CONFIG_DIR/syntaxes"
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# Put new '.sublime-syntax' language definition files
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# in this folder (or its subdirectories), for example:
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git clone https://github.com/tellnobody1/sublime-purescript-syntax
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```
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Now use the following command to parse these files into a binary cache:
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```bash
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bat cache --init
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```
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Finally, use `bat --list-languages` to check if the new languages are available.
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If you ever want to go back to the default settings, call:
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```bash
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bat cache --clear
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```
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### Adding new themes
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This works very similar to how we add new syntax definitions.
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First, create a folder with the new syntax highlighting themes:
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```bash
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BAT_CONFIG_DIR="$(bat cache --config-dir)"
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mkdir -p "$BAT_CONFIG_DIR/themes"
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cd "$BAT_CONFIG_DIR/themes"
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# Download a theme in '.tmTheme' format, for example:
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git clone https://github.com/greggb/sublime-snazzy
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# Create a link to specify the new default theme
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ln -sf "sublime-snazzy/Sublime Snazzy.tmTheme" Default.tmTheme
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# Update the binary cache
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bat cache --init
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```
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Finally, use `bat --list-themes` to check if the new themes are available.
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**Note:** Unlike for syntax definitions, adding custom themes currently *removes all default
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themes*. If you want to go back to the default themes, call `bat cache --clear`.
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### Using a different pager
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`bat` uses the pager that is specified in the `PAGER` environment variable. If this variable is not
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set, `less` is used by default. If you want to use a different pager, you can either modify the
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`PAGER` variable or set the `BAT_PAGER` environment variable to override what is specified in
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`PAGER`. If you want to pass command-line arguments to the pager, you need to create a small shell
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script as a wrapper, for example:
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```bash
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#!/bin/bash
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less --tabs 4 -RF "$@"
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```
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## Project goals and alternatives
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`bat` tries to achieve the following goals:
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- Provide beautiful, advanced syntax highlighting
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- Integrate with Git to show file modifications
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- Be a drop-in replacement for (POSIX) `cat`
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- Offer a user-friendly command-line interface
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There are a lot of alternatives, if you are looking for similar programs. See
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[this document](doc/alternatives.md) for a comparison.
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