A tiny utility to highlight multiple keywords with different colors
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Idea: Paolo Antinori
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Based on: ack - http://beyondgrep.com/ written by Andy Lester
h (hhighlighter is just a name to help search engines) is a really tiny helper script meant to highlight keywords in the output of another *nix command:
h is just a tiny facade in front of ack so you need to install it first.
What is ack?
ack is a tool like grep, optimized for programmers
Designed for programmers with large heterogeneous trees of source code, ack is written purely in portable Perl 5 and takes advantage of the power of Perl’s regular expressions.
ack installation
ack is part of many major linux distributions so you should use your package manager to install it.
If you want to install ack in a portable way ( at the end ack is just a script ) you do it in this way:
curl http://beyondgrep.com/ack-2.08-single-file > ~/bin/ack && chmod 0755 !#:3
h is implemented as a function in bash.
You can install it in one of these ways:
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copy and paste
h()function in your~/.bashrc -
configure your
~/.bashrcto load the external script with. /path/to/h.sh
h is meant to consume the output of another Linux command via pipe
$ h
usage: YOUR_COMMAND | h [-i] [-d] args...
-i : ignore case
-d : disable regexp
-n : invert colorsH_COLORS_FG and H_COLORS_BG.These variables accepts a comma separated values set of Perl Term::ANSIColor configuration entries. For a table of RGB colors definition check this handy map:
Ex.
export H_COLORS_FG="bold black on_rgb520","bold red on_rgb025" export H_COLORS_BG="underline bold rgb520","underline bold rgb025" echo abcdefghi | h a b c d
echo "abcdefghijklmnopqrstuvxywz" | h a b c d e f g h i j k l
echo "abcdefghijklmnopqrstuvxywz" | h -n a b c d e f g h i j k l
tail in follow modetail -F | h keyword1 keyword2
mvn clean install | h -i failure success
tail -F my.log | h -d org.apache.camel
echo abcd | h 'b|d'
