Re: completing file names

[Peter Stephenson <pws@csr.com>]

"Andrei A. Voropaev" wrote:
> Completion is very good, but very complex to quickly understand it :) So
> far I've configured everything as compinstall was guiding and I'm
> satisfied. Only one thing bothers me. I would like to get the list of
> hosts not from /etc/hosts file but from some other file. Because then I
> can rely on DNS to find the appropriate IP for given file name. And
> names I can collect say in ~/.known_hosts one host per line. How can I
> set it up?

You need to set the "hosts" style to the list of values in the file.

zstyle ':completion:*' hosts $(<~/.known_hosts)

should be good enough (host names don't need special quoting).

> (in fact ~/.ssh/known_hosts can be such file, but there the host name is
> followed by lots of things on the line :)

You can do that, too:

zstyle ':completion:*' hosts ${${(f)"$(<~/.ssh/known_hosts)"}%%[[:space:],]*}

This is using zsh's CompletelyImpenetrableExpansionSystem (TM):

"$(<~/.ssh/known_hosts)"

produces the contents of the file as a single string.

${(f)...}

splits that into an array of strings, one for each line of the file.

${...%%[[:space:],]*}

for each element of the array, strips off everything from the first
space or comma on, leaving the initial hostname in each case.  (My
~/.ssh/known_hosts has IP addresses after a comma, which we don't want.)

-- 
Peter Stephenson <pws@csr.com>                  Software Engineer
CSR PLC, Churchill House, Cambridge Business Park, Cowley Road
Cambridge, CB4 0WZ, UK                          Tel: +44 (0)1223 692070


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