Pretty-print text files inside terminal using bat a cat clone with syntax highlighting and Git integration.
Install bat utility.
$ sudo apt install bat
Display help information.
$ batcat --help
bat 0.12.1
A cat(1) clone with syntax highlighting and Git integration.
USAGE:
batcat [OPTIONS] [FILE]...
batcat <SUBCOMMAND>
OPTIONS:
-l, --language <language>
Explicitly set the language for syntax highlighting. The language can be specified as a
name (like ';C++'; or ';LaTeX';) or possible file extension (like ';cpp';, ';hpp'; or ';md';). Use
';--list-languages'; to show all supported language names and file extensions.
-L, --list-languages
Display a list of supported languages for syntax highlighting.
-m, --map-syntax <from:to>...
Map a file extension or file name to an existing syntax. For example, to highlight
*.conf files with the INI syntax, use ';-m conf:ini';. To highlight files named
';.myignore'; with the Git Ignore syntax, use ';-m .myignore:gitignore';.
--theme <theme>
Set the theme for syntax highlighting. Use ';--list-themes'; to see all available themes.
To set a default theme, add the ';--theme="..."'; option to the configuration file or
export the BAT_THEME environment variable (e.g.: export BAT_THEME="...").
--list-themes
Display a list of supported themes for syntax highlighting.
--style <style-components>
Configure which elements (line numbers, file headers, grid borders, Git modifications,
..) to display in addition to the file contents. The argument is a comma-separated list
of components to display (e.g. ';numbers,changes,grid';) or a pre-defined style (';full';).
To set a default style, add the ';--style=".."'; option to the configuration file or
export the BAT_STYLE environment variable (e.g.: export BAT_STYLE=".."). Possible
values: *auto*, full, plain, changes, header, grid, numbers, snip.
-p, --plain
Only show plain style, no decorations. This is an alias for ';--style=plain';. When ';-p';
is used twice (';-pp';), it also disables automatic paging (alias for ';--style=plain
--pager=never';).
-n, --number
Only show line numbers, no other decorations. This is an alias for ';--style=numbers';
-A, --show-all
Show non-printable characters like space, tab or newline. This option can also be used
to print binary files. Use ';--tabs'; to control the width of the tab-placeholders.
-r, --line-range <N:M>...
Only print the specified range of lines for each file. For example:
';--line-range 30:40'; prints lines 30 to 40
';--line-range :40'; prints lines 1 to 40
';--line-range 40:'; prints lines 40 to the end of the file
-H, --highlight-line <N>...
Highlight the N-th line with a different background color
--color <when>
Specify when to use colored output. The automatic mode only enables colors if an
interactive terminal is detected. Possible values: *auto*, never, always.
--italic-text <when>
Specify when to use ANSI sequences for italic text in the output. Possible values:
always, *never*.
--decorations <when>
Specify when to use the decorations that have been specified via ';--style';. The
automatic mode only enables decorations if an interactive terminal is detected. Possible
values: *auto*, never, always.
--paging <when>
Specify when to use the pager. To control which pager is used, set the PAGER or
BAT_PAGER environment variables (the latter takes precedence) or use the ';--pager';
option. To disable the pager permanently, set BAT_PAGER to an empty string or set
';--paging=never'; in the configuration file. Possible values: *auto*, never, always.
--pager <command>
Determine which pager is used. This option will overwrite the PAGER and BAT_PAGER
environment variables. The default pager is ';less';. To disable the pager completely, use
the ';--paging'; option. Example: ';--pager "less -RF"';.
--wrap <mode>
Specify the text-wrapping mode (*auto*, never, character). The ';--terminal-width'; option
can be used in addition to control the output width.
--tabs <T>
Set the tab width to T spaces. Use a width of 0 to pass tabs through directly
-u, --unbuffered
This option exists for POSIX-compliance reasons (';u'; is for ';unbuffered';). The output is
always unbuffered - this option is simply ignored.
--terminal-width <width>
Explicitly set the width of the terminal instead of determining it automatically. If
prefixed with ';+'; or ';-';, the value will be treated as an offset to the actual terminal
width. See also: ';--wrap';.
-h, --help
Print this help message.
-V, --version
Show version information.
ARGS:
<FILE>...
File(s) to print / concatenate. Use a dash (';-';) or no argument at all to read from
standard input.
SUBCOMMANDS:
cache Modify the syntax-definition and theme cache
Display supported languages.
$ batcat --list-languages
ActionScript as
Advanced CSV csv, tsv
AppleScript applescript, script editor
ARM Assembly s, S
AsciiDoc adoc, asciidoc, asc
ASP asa
Assembly (x86_64) yasm, nasm, asm, inc, mac
AWK awk
Batch File bat, cmd
BibTeX bib
Bourne Again Shell (bash) sh, bash, zsh, .bash_aliases, .bash_completions, .bash_functions,
.bash_login, .bash_logout, .bash_profile, .bash_variables, .bashrc,
.profile, .textmate_init, .zshrc, PKGBUILD, .ebuild, .eclass
C c, h
C# cs, csx
C++ cpp, cc, cp, cxx, c++, C, h, hh, hpp, hxx, h++, inl, ipp
Cabal cabal
Clojure clj, cljc, cljs, edn
CMake CMakeLists.txt, cmake
CMake C Header h.in
CMake C++ Header hh.in, hpp.in, hxx.in, h++.in
CMakeCache CMakeCache.txt
Crystal cr
CSS css, css.erb, css.liquid
D d, di
Dart dart
Diff diff, patch
Dockerfile Dockerfile, dockerfile
DotENV .env, .envrc, .env.dist, .env.local, .env.sample, .env.example,
.env.test, .env.test.local, .env.dev, .env.development,
.env.development.local, .env.prod, .env.production,
.env.production.local, .env.dusk.local
Elixir ex, exs
Elm elm
Erlang erl, hrl, Emakefile, emakefile
F# fs, fsi, fsx
F# fs, fsi, fsx
friendly interactive shell (fish) fish
Git Attributes attributes, gitattributes, .gitattributes
Git Commit COMMIT_EDITMSG, MERGE_MSG, TAG_EDITMSG
Git Config gitconfig, .gitconfig, .gitmodules
Git Ignore exclude, gitignore, .gitignore
Git Link .git
Git Log gitlog
Git Rebase Todo git-rebase-todo
Go go
Graphviz (DOT) dot, DOT, gv
Groovy groovy, gvy, gradle, Jenkinsfile
Haskell hs
Haskell (improved) hs, hsc
Highlight non-printables show-nonprintable
hosts hosts
HTML html, htm, shtml, xhtml
HTML (ASP) asp
HTML (EEx) html.eex
HTML (Erlang) yaws
HTML (Rails) rails, rhtml, erb, html.erb
HTML (Tcl) adp
HTML (Twig) twig, html.twig
INI ini, INI, INF, reg, REG, lng, cfg, CFG, desktop, url, URL,
.editorconfig, .hgrc, hgrc
Java java, bsh
Java Properties properties
Java Server Page (JSP) jsp
JavaScript js, htc
JavaScript (Babel) js, jsx, babel, es6
JavaScript (Rails) js.erb
JSON json, sublime-settings, sublime-menu, sublime-keymap,
sublime-mousemap, sublime-theme, sublime-build, sublime-project,
sublime-completions, sublime-commands, sublime-macro,
sublime-color-scheme, ipynb, Pipfile.lock
jsonnet jsonnet, libsonnet, libjsonnet
Julia jl
Kotlin kt, kts
LaTeX tex, ltx
Less less, css.less
Lisp lisp, cl, clisp, l, mud, el, scm, ss, lsp, fasl
Literate Haskell lhs
Lua lua
Makefile make, GNUmakefile, makefile, Makefile, makefile.am, Makefile.am,
makefile.in, Makefile.in, OCamlMakefile, mak, mk
Manpage man
Markdown md, mdown, markdown, markdn
MATLAB matlab
NAnt Build File build
Nix nix
Objective-C m, h
Objective-C++ mm, M, h
OCaml ml, mli
OCamllex mll
OCamlyacc mly
orgmode org
Pascal pas, p, dpr
Perl pl, pm, pod, t, PL
PHP php, php3, php4, php5, php7, phps, phpt, phtml
Plain Text txt
PowerShell ps1, psm1, psd1
Protocol Buffer proto, protodevel
Protocol Buffer (TEXT) pb.txt, proto.text, textpb, pbtxt, prototxt
Puppet pp, epp
PureScript purs
Python py, py3, pyw, pyi, pyx, pyx.in, pxd, pxd.in, pxi, pxi.in, rpy, cpy,
SConstruct, Sconstruct, sconstruct, SConscript, gyp, gypi, Snakefile,
wscript
R R, r, s, S, Rprofile
Rd (R Documentation) rd
Regular Expression re
requirements.txt requirements.txt
reStructuredText rst, rest
Robot Framework syntax highlighting. robot
Ruby rb, Appfile, Appraisals, Berksfile, Brewfile, capfile, cgi, Cheffile,
config.ru, Deliverfile, Fastfile, fcgi, Gemfile, gemspec, Guardfile,
irbrc, jbuilder, Podfile, podspec, prawn, rabl, rake, Rakefile,
Rantfile, rbx, rjs, ruby.rail, Scanfile, simplecov, Snapfile, thor,
Thorfile, Vagrantfile
Ruby Haml haml, sass
Ruby on Rails rxml, builder
Rust rs
Sass sass
Scala scala, sbt
SCSS scss
SQL sql, ddl, dml
SQL (Rails) erbsql, sql.erb
SSH Config ssh_config
SSHD Config sshd_config
Strace strace
Swift swift
syslog log
Tcl tcl
Terraform tf, tfvars, hcl
TeX sty, cls
Textile textile
TOML toml, tml, Cargo.lock, Gopkg.lock, Pipfile
TypeScript ts
TypeScriptReact tsx
varlink varlink
Verilog v, V
VimL vim, .vimrc
XML xml, xsd, xslt, tld, dtml, rss, opml, svg
YAML yaml, yml, sublime-syntaxDisplay supported themes.
$ batcat --list-themes
Theme: 1337
// Output the square of a number.
fn print_square(num: f64) {
let result = f64::powf(num, 2.0);
println!("The square of {:.2} is {:.2}.", num, result);
}
Theme: DarkNeon
// Output the square of a number.
fn print_square(num: f64) {
let result = f64::powf(num, 2.0);
println!("The square of {:.2} is {:.2}.", num, result);
}
Theme: GitHub
// Output the square of a number.
fn print_square(num: f64) {
let result = f64::powf(num, 2.0);
println!("The square of {:.2} is {:.2}.", num, result);
}
Theme: Monokai Extended
// Output the square of a number.
fn print_square(num: f64) {
let result = f64::powf(num, 2.0);
println!("The square of {:.2} is {:.2}.", num, result);
}
Theme: Monokai Extended Bright
// Output the square of a number.
fn print_square(num: f64) {
let result = f64::powf(num, 2.0);
println!("The square of {:.2} is {:.2}.", num, result);
}
Theme: Monokai Extended Light
// Output the square of a number.
fn print_square(num: f64) {
let result = f64::powf(num, 2.0);
println!("The square of {:.2} is {:.2}.", num, result);
}
Theme: Monokai Extended Origin
// Output the square of a number.
fn print_square(num: f64) {
let result = f64::powf(num, 2.0);
println!("The square of {:.2} is {:.2}.", num, result);
}
Theme: OneHalfDark
// Output the square of a number.
fn print_square(num: f64) {
let result = f64::powf(num, 2.0);
println!("The square of {:.2} is {:.2}.", num, result);
}
Theme: OneHalfLight
// Output the square of a number.
fn print_square(num: f64) {
let result = f64::powf(num, 2.0);
println!("The square of {:.2} is {:.2}.", num, result);
}
Theme: Sublime Snazzy
// Output the square of a number.
fn print_square(num: f64) {
let result = f64::powf(num, 2.0);
println!("The square of {:.2} is {:.2}.", num, result);
}
Theme: TwoDark
// Output the square of a number.
fn print_square(num: f64) {
let result = f64::powf(num, 2.0);
println!("The square of {:.2} is {:.2}.", num, result);
}
Theme: ansi-dark
// Output the square of a number.
fn print_square(num: f64) {
let result = f64::powf(num, 2.0);
println!("The square of {:.2} is {:.2}.", num, result);
}
Theme: ansi-light
// Output the square of a number.
fn print_square(num: f64) {
let result = f64::powf(num, 2.0);
println!("The square of {:.2} is {:.2}.", num, result);
}
Theme: base16
// Output the square of a number.
fn print_square(num: f64) {
let result = f64::powf(num, 2.0);
println!("The square of {:.2} is {:.2}.", num, result);
}
Theme: zenburn
// Output the square of a number.
fn print_square(num: f64) {
let result = f64::powf(num, 2.0);
println!("The square of {:.2} is {:.2}.", num, result);
}
Sample usage.
$ batcat --plain --line-range 23:41 --highlight-line 39 --highlight-line 40 --language go --theme "TwoDark" src/crio-top/main.go
for {
// clear screen
terminal.Clear()
// display date
terminal.CreateDateLine()
// create empty line
terminal.CreateEmptyLine()
// display header
terminal.PrintHeader(appConfiguration)
// display data
terminal.PrintRows(appConfiguration, backgroundProcess)
// sleep for a duration defined in YAML configuration
time.Sleep(time.Duration(appConfiguration.Application.Refresh.Window) * time.Second)
}
Set BAT_THEME variable and export it.
$ export BAT_THEME="OneHalfDark"
Pretty print git diff.
$ git diff 31a5c52..6be13cb | batcat --plain
diff --git a/31a5c52 b/6be13cb index 31a5c52..6be13cb 100644 --- a/31a5c52 +++ b/6be13cb @@ -10,7 +10,7 @@ This is a playground to learn Go language. sample output using provided configuration ``` -$ crtop --configuration configuration.yaml +$ crio-top --configuration configuration.yaml ``` ```
$ git diff src/crio-top/main.go | batcat --plain
diff --git a/src/crio-top/main.go b/src/crio-top/main.go
index 7c23f5e..16b0083 100644
--- a/src/crio-top/main.go
+++ b/src/crio-top/main.go
@@ -3,10 +3,10 @@
package main
import (
+ "time"
"golang/src/background"
"golang/src/configuration"
"golang/src/terminal"
- "time"
)
func main() {
@@ -21,7 +21,7 @@ func main() {
// display results
for {
- // clear screen and return to the right-left corner
+ // clear screen
terminal.Clear()
// display date
@@ -36,7 +36,7 @@ func main() {
// display data
terminal.PrintRows(appConfiguration, backgroundProcess)
- // sleep for a defined duration
+ // sleep for a duration defined in YAML configuration
time.Sleep(time.Duration(appConfiguration.Application.Refresh.Window) * time.Second)
}
}
Pretty print git log.
$ git log -1 | batcat --plain
commit 4052d3ad2bc1a7dc4cb8d960dfb2d409140ddb94
Author: Milosz Galazka <milosz@sleeplessbeastie.eu>
Date: Sun May 16 22:41:34 2021 +0200
readme fixes
