A command-line tool to filter text and highlight the output.
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README.md

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Written by Dave Goodell davidjgoodell@gmail.com MIT License (see "highlight" script)

The latest version should be available at github:

http://github.com/goodell/highlight

This package also includes a bonus script (bleach_text) to strip out ANSI color escape sequences. The highlight program unconditionally colors text, regardless of whether STDOUT is connected to a terminal or not, so such a program is occasionally useful.


Usage: ./highlight [-i] [--color=COLOR_STRING] [--] <PATTERN0> [PATTERN1...]
  or
Usage: ./highlight [-i] [--filter COLOR,PATTERN] [--filter COLOR,PATTERN]

This is highlight version 1.2.

This program takes text via standard input and outputs it with the given
perlre(1) pattern(s) highlighted with the given color.  If no color option
is specified, it defaults to 'bold red'.  Colors may be anything
that Perl's Term::ANSIColor understands.  This program is similar to
"grep --color PATTERN" except both matching and non-matching lines are
printed.

The default color can be selected via the $HIGHLIGHT_COLOR environment
variable.  The command-line option takes precedence.

Passing -i or --ignore-case will enable case-insensitive matching.

If your pattern begins with a dash ('-'), you can pass a '--' argument
after any options and before your pattern to distinguish it from an
option.