share my experience: highlight parts of a text file that matches a regular expression

[Zhang Weiwu]

于 Wed, 6 Jun 2007 11:16:17 -0500
"Eric F Crist" <mnslinky at gmail.com> 写道:

> That's great!  One question, how do I make it highlight the entire
> line, rather than the searched-for text?

Guess would be:
$ my_app | grep --color=auto -e '.*regexp.*' -e '$'

Add '.*' before and after your regular expression

> 
> Thanks!
> 
> Eric Crist
> 
> 
> On 6/6/07, Zhang Weiwu <zhangweiwu at realss.com> wrote:
> >
> > Dear list
> >
> > I'd like to highlight part of output of one application that
> > matches a regular expression. First I thought this is simple:
> >
> > $ my_app | grep --color=auto 'regexp'
> >
> > This method have a big problem that lines doesn't match regexp is
> > not displayed, in my case I want all output of my_app being
> > displayed, only the matching part highlighted.
> >
> > First I thought grep might have a parameter to output everything it
> > receive, and it seems it doesn't. And I discovered I can use '-e'
> > parameter for this purpose:
> >
> > $ my_app | grep --color=auto -e 'regexp' -e '$'
> >
> > The second -e makes all line matched.
> >
> > Maybe useful for some newbies.
> > --
> > Zhang Weiwu
> > Real Softservice
> > http://www.realss.com
> > +86 592 2091112
> >
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