On Mon, 16 Dec 2002, Marc Perkel wrote:
> Could you give me an example of how to do that with sg?
${sg{ outer sg
${sg{ inner sg ) operand
${readfile{/file}{|}} operand for inner sg ) for
} end of operand ) outer
{\\|\$} match | at end ) sg
{} replace with nothing )
} end of inner sg )
} end operand for outer sg
{\\|\\|} match ||
{|} replace with |
}
I have not put in continuations characters. Also, you'll need to be
careful about the $ and \ in the regular expressions. I've put in the
escapes that are needed in an expansion string.
Hmm. Now that I think about it, you could probably do it all in one sg
call, which is probably more efficient:
${sg{
${readfile{/file}{|}}
}
{\\|(\\||\$)}
{$1}
}
The pattern now matches | followed either by another | or end of line.
The replacement just loses the first |. I have not tested either of
these. You should be able to test easily enough with "exim -be".
Regular expressions are your friend!
> Or - could you have some "smart" read file that would strip blank lines
> and comment lines as well?
I fear that is getting too special-purpose.
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
