[augeas-devel] Hash-like entries across multiple lines

[David Lutterkort]

On Mon, 2008-08-25 at 10:22 +0200, Free Ekanayaka wrote:
> Hi,
> 
> I am working on a lens to parse /etc/dhclient.conf (you find the
> current code below), and I would like to parse a sequence of
> statements like:
> 
> send fqdn.fqdn \"grosse.fugue.com.\";
> send fqdn.encoded on;
> 
> into a tree like:
> 
> { "send" 
>      { "fqdn.fqdn" = "\"grosse.fugue.com.\"" }
>      { "fqdn.encoded" = "on" } }

If the two send lines are consecutive, and you could generate that tree,
but it's not going to be pretty.

> Note that the two statements could also be in different positions in
> the file, not only one right after the other, for example:
> 
> send fqdn.fqdn \"grosse.fugue.com.\";
> some statement;
> more statements at will;
> send fqdn.encoded on;

For this file, you'd have to create two separate send nodes -
intutively, the order of the tree nodes must be the same as the order of
the corresponding entries in the file.

> Currently I'm creating different tree nodes for the two statements (see
> test_dhclient.aug), like:
> 
>     { "send" 
>        { "fqdn.fqdn" = "\"grosse.fugue.com.\"" } }
>     { "send" 
>        { "fqdn.encoded" = "on" } }
> 
> However I'd like to be able to have a single /send node with all its
> hashed key/values pairs.

As Raphael said, it's not a big issue in practice, since you can refer
to the 'fqdn.encoded' value with '/send/fqdn.encoded' in both cases -
when you add new entries to the tree you have to know the exact
structure though.

David