All PCRE matches are greedy, unless you make them stingy. So .* is greedy, .*?
is stingy
On Dec 8, 2010, at 12:02 AM, Daniel Dehennin wrote:
> Michael Potter <mega...@gmail.com> writes:
>
>> I believe the problem is this expression:
>>
>> "^(smtp_host)\s+.*$" replace_with => value("$(match.1) $(smtp)"),
>>
>> Because you use a .* after the whitespace, the regex will continue to match
>> after any replacement occurs.
>>
>> Try using a negative lookahead assertion:
>>
>> "^(smtp_host)\s+(?!$(smtp))$"
>>
>> This will ensure the pattern only matches when smtp_host is *not* followed
>> by $(smtp), so after the first replacement occurs, the regex will no longer
>> match and will be convergent.
>
> Thanks, it looks like the match must be greedy.
>
> With the normal ordering of edit_line, I finish to delete_lines that do
> not match and then insert_lines.
>
> Thanks.
> --
> Daniel Dehennin
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