{(t)...} usage

{(t)...} usage

[Mario Lang]

Hello.

(Please reply direct to me, I am not subscribed)

I am trying to place the hosts completion
part in my .zshrc into a zstyle -e expression.

For that, I'd like to use a unique array, and I found
the (t) flag in the manpages.

There is just no example there, and I didnt figure out how
to use it.

${(t)array-unique $(grep -v "^#" /etc/hosts) ${...some_ssh_known_hosts_too})

Is basicly what I want to do.

But the usage ot (t) is obviously wrong, it just doesnt work.

Can anyone give me an example on how to do this?


-- 
CYa,
  Mario

Re: {(t)...} usage

[Eric Gillespie]

Mario Lang <mlang@delysid.org> writes:

> Can anyone give me an example on how to do this?

Here's how i do host completion based purely on ssh known_hosts
files.  This strips newlines and comments.

my_hosts=(${(M)${${${${(f)"$(<~/.ssh/known_hosts2)"}:#[0-9]*}%%\ *}%%,*}:#^\#})
etc_file=/etc/ssh/ssh_known_hosts2
if [[ -f $etc_file ]]; then
    etc_hosts=(${(M)${${${${(f)"$(<$etc_file)"}:#[0-9]*}%%\ *}%%,*}:#^\#})
fi
zstyle ':completion:*:*:(ping|nc|s(sh|cp)):*' hosts $etc_hosts $my_hosts

--  
Eric Gillespie <*> epg@pretzelnet.org

Conformity is a sin.

Re: {(t)...} usage

[Bart Schaefer]

On Jun 14,  5:06pm, Mario Lang wrote:
} Subject: {(t)...} usage
}
} ... I'd like to use a unique array, and I found
} the (t) flag in the manpages.
} 
} There is just no example there, and I didnt figure out how
} to use it.

I'd like to know which manual you're reading, because the (t) flag has
nothing to do with unique arrays.  It reports the -type- of a parameter
("parameter" is another word for "variable" in zsh parlance).

There is a (u) flag in the 4.1.x-dev versions, but it's not available
in zsh 4.0.x or 3.anything.

However, you're on a wild goose chase.  You don't need to make the array
unique.  The completion system will take care of doing that before it
offers you any choices.

} ${(t)array-unique $(grep -v "^#" /etc/hosts) ${...some_ssh_known_hosts_too})

There is so much wrong here that I don't have time even to begin to
figure out what you actually meant, never mind explaining how to fix it.

Please read Chapter 5 <http://zsh.sunsite.dk/Guide/zshguide05.html> of
Peter Stephenson's Zsh User's Guide.  It explains many details of parameter
substitutions, with a lot of examples.

Meanwhile, if you don't mind simply pasting someone else's black magic
into your .zshrc file, the following will probably make your completion
work mostly the way you want:

zstyle -e ':completion:*:(ssh|scp):*' hosts 'reply=(
    ${=${${(f)"$(cat {/etc/ssh_,~/.ssh/known_}hosts(|2)(N) \
		     /dev/null)"}%%[# ]*}//,/ }
    ${=${(f)"$(cat /etc/hosts(|)(N) <<(ypcat hosts 2>/dev/null))"}%%\#*}
    )'

-- 
Bart Schaefer                                 Brass Lantern Enterprises
http://www.well.com/user/barts              http://www.brasslantern.com

Zsh: http://www.zsh.org | PHPerl Project: http://phperl.sourceforge.net