expansion after =?

expansion after =?

[Seth Kurtzberg]

Hello list,

Is there a configuration parameter or option that enables path completion after equals, for example, export ENVVAR=/some/path/name?  I've been using zsh for some months now, and this is the only thing that bash does that I find missing in zsh.  But perhaps the behavior can be turned on in some way?

TIA

-- 
Seth Kurtzberg
MIS Corp
480-661-1849
seth@cql.com

Re: expansion after =?

[Dan Nelson]

In the last episode (Jul 02), Seth Kurtzberg said:
> Hello list,
> 
> Is there a configuration parameter or option that enables path
> completion after equals, for example, export ENVVAR=/some/path/name? 
> I've been using zsh for some months now, and this is the only thing
> that bash does that I find missing in zsh.  But perhaps the behavior
> can be turned on in some way?

Try two equals signs, one for the assignment, and one for path
expansion.

dan% PAGER==less
dan% echo $PAGER
/usr/bin/less
dan%

It's documented under FILENAME EXPANSION:

       If  a  word  begins  with  an  unquoted `=' and the EQUALS
       option is set, the remainder of the word is taken  as  the
       name  of  a command or alias.  If a command exists by that
       name, the word is replaced by the  full  pathname  of  the
       command.   If  an  alias  exists by that name, the word is
       replaced with the text of the alias.

I didn't even know bash could do path expansion.

-- 
	Dan Nelson
	dnelson@allantgroup.com

Re: expansion after =?

[Seth Kurtzberg]

On Wed, 2 Jul 2003 12:36:23 -0500
Dan Nelson <dnelson@allantgroup.com> wrote:

> In the last episode (Jul 02), Seth Kurtzberg said:
> > Hello list,
> > 
> > Is there a configuration parameter or option that enables path
> > completion after equals, for example, export ENVVAR=/some/path/name? 
> > I've been using zsh for some months now, and this is the only thing
> > that bash does that I find missing in zsh.  But perhaps the behavior
> > can be turned on in some way?
> 
> Try two equals signs, one for the assignment, and one for path
> expansion.
> 
> dan% PAGER==less
> dan% echo $PAGER
> /usr/bin/less
> dan%
> 
> It's documented under FILENAME EXPANSION:
> 
>        If  a  word  begins  with  an  unquoted `=' and the EQUALS
>        option is set, the remainder of the word is taken  as  the
>        name  of  a command or alias.  If a command exists by that
>        name, the word is replaced by the  full  pathname  of  the
>        command.   If  an  alias  exists by that name, the word is
>        replaced with the text of the alias.

Thanks much.  I did look in the docs but somehow I missed it.

> 
> I didn't even know bash could do path expansion.

It doesn't do it nearly as well as zsh, but it does manage to more or less do it.  But I would never go back to bash after using zsh.

> 
> -- 
> 	Dan Nelson
> 	dnelson@allantgroup.com
> 


-- 
Seth Kurtzberg
MIS Corp
480-661-1849
seth@cql.com

Re: expansion after =?

[Seth Kurtzberg]

Sorry, I responded without reading quite carefully enough.

I did know about this feature but it isn't what I'm referring to, so let me be more clear (hopefully).

I'm talking not about this type of expansion (sorry if I didn't use the correct terminology).  I'm talking about the case where you use completion, with the tab key, while setting an environment variable.

On Wed, 2 Jul 2003 12:36:23 -0500
Dan Nelson <dnelson@allantgroup.com> wrote:

> In the last episode (Jul 02), Seth Kurtzberg said:
> > Hello list,
> > 
> > Is there a configuration parameter or option that enables path
> > completion after equals, for example, export ENVVAR=/some/path/name? 
> > I've been using zsh for some months now, and this is the only thing
> > that bash does that I find missing in zsh.  But perhaps the behavior
> > can be turned on in some way?
> 
> Try two equals signs, one for the assignment, and one for path
> expansion.
> 
> dan% PAGER==less
> dan% echo $PAGER
> /usr/bin/less
> dan%
> 
> It's documented under FILENAME EXPANSION:
> 
>        If  a  word  begins  with  an  unquoted `=' and the EQUALS
>        option is set, the remainder of the word is taken  as  the
>        name  of  a command or alias.  If a command exists by that
>        name, the word is replaced by the  full  pathname  of  the
>        command.   If  an  alias  exists by that name, the word is
>        replaced with the text of the alias.
> 
> I didn't even know bash could do path expansion.
> 
> -- 
> 	Dan Nelson
> 	dnelson@allantgroup.com
> 


-- 
Seth Kurtzberg
MIS Corp
480-661-1849
seth@cql.com

Re: expansion after =?

[Peter Stephenson]

Seth Kurtzberg wrote:
> Is there a configuration parameter or option that enables path completion aft
> er equals, for example, export ENVVAR=/some/path/name?  I've been using zsh f
> or some months now, and this is the only thing that bash does that I find mis
> sing in zsh.  But perhaps the behavior can be turned on in some way?

If you are using the new completion system (autoload -U compinit;
compinit) then this will work automatically.  The old completion system
didn't have this built in, though you could use compctl to enable it;
you don't say what version of zsh you are using, but if it is 4.x you
are likely to get far better results with the new system.

You might also be interested in the option MAGIC_EQUAL_SUBST; this forces
~'s to be expanded after any ='s.

-- 
Peter Stephenson <pws@csr.com>                  Software Engineer
CSR Ltd., Science Park, Milton Road,
Cambridge, CB4 0WH, UK                          Tel: +44 (0)1223 692070


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Re: expansion after =?

[Seth Kurtzberg]

On Wed, 02 Jul 2003 18:39:32 +0100
Peter Stephenson <pws@csr.com> wrote:

> Seth Kurtzberg wrote:
> > Is there a configuration parameter or option that enables path completion aft
> > er equals, for example, export ENVVAR=/some/path/name?  I've been using zsh f
> > or some months now, and this is the only thing that bash does that I find mis
> > sing in zsh.  But perhaps the behavior can be turned on in some way?
> 
> If you are using the new completion system (autoload -U compinit;
> compinit) then this will work automatically.  The old completion system
> didn't have this built in, though you could use compctl to enable it;
> you don't say what version of zsh you are using, but if it is 4.x you
> are likely to get far better results with the new system.

Thanks much.  I'm using 4.0.6, so I have the new features.  I'm going to update to 4.0.7 just in case.  Or, would you suggest the development release?

With 4.0.6, the old completion system is used by default if I don't do the autoload sequence above?

> 
> You might also be interested in the option MAGIC_EQUAL_SUBST; this forces
> ~'s to be expanded after any ='s.

Yes, that will also be helpful.

Again, thanks for an outstanding software tool.

> 
> -- 
> Peter Stephenson <pws@csr.com>                  Software Engineer
> CSR Ltd., Science Park, Milton Road,
> Cambridge, CB4 0WH, UK                          Tel: +44 (0)1223 692070
> 
> 
> **********************************************************************
> The information transmitted is intended only for the person or
> entity to which it is addressed and may contain confidential 
> and/or privileged material. 
> Any review, retransmission, dissemination or other use of, or
> taking of any action in reliance upon, this information by 
> persons or entities other than the intended recipient is 
> prohibited.  
> If you received this in error, please contact the sender and 
> delete the material from any computer.
> **********************************************************************
> 
> 


-- 
Seth Kurtzberg
MIS Corp
480-661-1849
seth@cql.com

Re: expansion after =?

[Peter Stephenson]

Seth Kurtzberg wrote:
> Thanks much.  I'm using 4.0.6, so I have the new features.  I'm going to upda
> te to 4.0.7 just in case.  Or, would you suggest the development release?

You should be fine with 4.1.1, but you have to be using some pretty
sophisticated features to notice much difference.  (On the other hand
that includes most of the completion system :-).)

> With 4.0.6, the old completion system is used by default if I don't do the au
> toload sequence above?

Yes, the new completion system is never enabled by default since it's
function-based; the shell never automatically runs functions.  Some
pre-packaged distributions enable it in /etc/zshrc.

-- 
Peter Stephenson <pws@csr.com>                  Software Engineer
CSR Ltd., Science Park, Milton Road,
Cambridge, CB4 0WH, UK                          Tel: +44 (0)1223 692070


**********************************************************************
The information transmitted is intended only for the person or
entity to which it is addressed and may contain confidential 
and/or privileged material. 
Any review, retransmission, dissemination or other use of, or
taking of any action in reliance upon, this information by 
persons or entities other than the intended recipient is 
prohibited.  
If you received this in error, please contact the sender and 
delete the material from any computer.
**********************************************************************