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Date: Tue, 04 Dec 2012 11:35:04 -0400
From: Norbert Zeh <nzeh@cs.dal.ca>
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To: zsh-users@zsh.org
Subject: Re: Path does not update until I logout/log in
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On 12-12-04 10:33 AM, John wrote:
> If I install a new executable via my package manager, zsh doesn't allow me to see it via auto-completion until I either source my ~/.zshrc again.  Is there a setting that would control this?  Note that under bash, I don't need to tweak anything to get this behavior.
>
> Here is another tangible example:
>
> 1) Open two xterms
> 2) In one xterm do this:  sudo ln -s /usr/bin/top /usr/bin/newsymlink
>
> Now, if in the 2nd xterm I start typing, nothing happens for autocomplete:  newsy<TAB>
>
> Here is my config file:
>
> $ cat ~/.zshrc
> ZSH=$HOME/.zsh
>
> for config_file ($ZSH/lib/*.zsh) source $config_file
>
>
> for i in aliases commonrc functions zsh ; do [[ -f $HOME/.$i ]] && . $HOME/.$i ; done
>
>
> PROMPT='%(!.%{$fg_bold[red]%}.%{$fg_bold[white]%}%n@)%m %{$fg_bold[blue]%}%(!.%1~.%~) %#%{$reset_color%} '
>
>
> REPORTTIME=5
>
> autoload -U compinit
>
> compinit -i
zsh uses a hash table to store the list of known commands.  When you 
install a new command in your path, you need to update this hashtable by 
invoking "rehash".  This is similar to csh, I believe (been a while 
since I used this last).  bash, on the other hand, does a search for 
valid commands every single time.  zsh provides this possibility, too, 
by setting the "rehash" option, but this is disabled by default because 
it incurs a speed penalty.

Cheers,
Norbert