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Date: Tue, 20 Mar 2007 18:28:56 -0700
From: Gary Johnson <garyjohn AT spk DOT agilent DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Tab Completion and Typical Behavior
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On 2007-03-20, robert_neville310 AT yahoo DOT com wrote:
> On Mon, 19 Mar 2007 15:20:33 -0700, Gary Johnson
> <garyjohn AT spk DOT agilent DOT com> wrote:
   ^^^^^^^^^^^^^^^^^^^^^^^^
Including someone's address in your reply is frowned upon in this 
list.  http://cygwin.com/acronyms/#PCYMTNQREAIYR
I personally don't care--it's too late for the address I use on 
lists and I have a very good spam filter--but other folks are very 
sensitive to the issue, and rightly so.

I don't know what the list policy is for users who use only their 
address and don't include their name in their "From: " header, but I 
see that my mailer used your address because it couldn't find a 
name.  Oops.

> 
> >On 2007-03-19, robert_neville310 AT yahoo DOT com wrote:
> >> I have a question about tab completion in the console window. The
> >> .bash_profile exports the right paths and the console performs tab
> >> completion. My scripts can be found in ~/bin. I can tab out
> >> myscript.sh, but can not tab complete ./myscript.sh; or sh
> >> myscript.sh. Is this behavior normal? Can I change the console
> >> behavior to tab out ./myscript.sh?
> >
> >Larry didn't address the case of
> >
> >    sh myscript.sh
> >
> >which doesn't seem to work by default.  However, you can tell bash 
> >to expand the arguments to sh as commands by executing
> >
> >    complete -c sh
> >
> Works great. Thanks Gary.

You're welcome.

> Eric Blake wrote:

> > That is, if you don't use the bash-completion package.  If you install
> > that, and tweak your ~/.bashrc (/etc/defaults/etc/skel/.bashrc has some
> > hints), then you get this, and many other, programmable completion tweaks
> > by default.
> 
> Not many hints in my .bashrc. It just has this code block.
> 
> # If this shell is interactive, turn on programmable completion
> enhancements.
> # Any completions you add in ~/.bash_completion are sourced last.
> # case $- in
> #   *i*) [[ -f /etc/bash_completion ]] && . /etc/bash_completion ;;
> # esac
> 
>  I am not familar with  interactive mode and do not have a
> bash_completion file.

Interactive mode is the mode the shell is in when you're controlling 
it from a command prompt.  The shell is usually not in interactive 
mode when it's executing a script.

You can get the bash-completion package from here:

    http://cygwin.com/packages/

but I don't know if it installs the .bash_completion file itself or 
whether you have to do that yourself.  I didn't even know about it 
until reading Eric's reply.

> 
> complete -c sh
> 
> Do I need to place this statement in the .bashrc? What is the proper
> syntax?

Unless you are going to use the bash-completion package which will 
apparently get you this and much more, then yes, put that statement 
just as it is in your ~/.bashrc.  That's one of the nice things 
about bash and other Unix shells:  the syntax in a script file or 
initialization file is the same as the syntax from the keyboard.

> 
> I am asking for confirmation to avoid breaking my console. By the way,
> I do not have the bash_completion file or a template for it. I could
> easily touch the file if necessary.
> 
> What is $- ?

$- is an environment variable that contains the current set of 
options.  For example, from the bash I have running in an rxvt 
window,

    $ echo $-
    himBH

You can then execute "man bash" and search for -h, for example, to 
discover that the shell will "[r]emember the location of commands as 
they are looked up for execution.  This is enabled by default."

Regards,
Gary

-- 
Gary Johnson                 | Agilent Technologies
garyjohn AT spk DOT agilent DOT com     | Mobile Broadband Division
                             | Spokane, Washington, USA

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