Forum: Cfengine Help
Subject: Re: search and replace help
Author: zzamboni
Link to topic: https://cfengine.com/forum/read.php?3,20275,20279#msg-20279
Neil,
(?! ...) is a _zero-width_ negative look-ahead assertion. Since it's
zero-width, it ensures that the text inside the assertion is not present at
that point, but it does not actually match that text. So even though your regex
ensures that "7200" is not present at that point, the match stops _before_ the
200, and thus the new text is inserted at that point.
I believe what you want is something like this:
edit_line => search_replace(
"HISTSIZE=.*$",
"HISTSIZE=${histsize}");
You don't even need to use the value in the regex, because cfengine will do the
replacement in memory and only update the file (and thus mark it as repaired)
if the result is different from what was already there.
Shameless plug: you could also do this using my set_variable_values() bundle:
https://github.com/zzamboni/cfengine-copbl/blob/master/cfengine_stdlib.cf#L171
. Which as an added benefit, will add the line if it does not exist already in
the file :)
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