Re: Adding OR editing line only if not present

[Jamie Wilkinson]

Quoting Florian Thiel <noroute@web.de>:

> What I want to do is the following:
> Append a certain line if it's not already there. If it's there, see if
> it maches a certain regexp. If it doesn't, replace it.

This is the goal of my cf.ssh which I posted yesterday.  Your construct is a bit
shorter, as you're using AppendIfNoLineMatching, whereas I use a Begin/EndGroup.

> LocateLineMatching "^allow="
> BeginGroupIfNoMatch "^allow=10\.\$(nr)\.0\.0/255\.255\.0\.0 127\.0\.0\.1"
>   ReplaceLineWith "allow=10\.$(nr)\.0\.0/255\.255\.0\.0 127\.0\.0\.1"
> EndGroup
> DefineClasses "restart_webmin"

This is the only way you can do it.  But I'd like to point out that the
ReplaceLineWith takes a quoted-string, not a regex, so you don't need to escape
the fullstops.  I'd also not bother with the BeginGroupIfNoMatch line.

Jamie