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Date:	Tue, 28 Sep 2004 13:14:54 -0400 (EDT)
From:	Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To:	cygwin AT cygwin DOT com
To:	cygwin AT cygwin DOT com
Subject:	Re: "which" command does not expand "~" in path (base-files update needed)
In-Reply-To:	<20040928153144.GM26145@trixie.casa.cgf.cx>
Message-ID:	<Pine.GSO.4.61.0409281308460.4220@slinky.cs.nyu.edu>
References:	<6 DOT 1 DOT 2 DOT 0 DOT 1 DOT 20040929010527 DOT 027f4eb0 AT mail DOT ros DOT com DOT au> <20040928153144 DOT GM26145 AT trixie DOT casa DOT cgf DOT cx>
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On Tue, 28 Sep 2004, Christopher Faylor wrote:

> On Wed, Sep 29, 2004 at 01:08:42AM +1000, Errol Smith wrote:
> >At 09:23 PM 26/09/2004, "Hannu E K Nevalainen" wrote:
> >>FWIW; 'man bash' has a section on Tilde Expansion - I take it as; bash does
> >>this expansion for you, not which.exe -> use $HOME when not typing at the
> >>prompt.
> >
> > This is all fine & good, but it doesn't change the fact that the
> >cygwin-supplied "which" does NOT work with the cygwin-supplied
> >".bash_profile" (when you use a personal ~/bin directory.).
> > Here is a simple patch which fixes half the problem (the ".bash_profile"
> >placing a raw ~ in the path):
> >
> >--- /etc/skel/.bash_profile     2004-05-15 21:40:04.000000000 +1000
> >+++ .bash_profile       2004-09-29 00:21:50.000000000 +1000
> >@@ -10,16 +10,16 @@
> >
> > # Set PATH so it includes user's private bin if it exists
> > # if [ -d ~/bin ] ; then
> >-#   PATH="~/bin:${PATH}"
> >+#   PATH="${HOME}/bin:${PATH}"
> > # fi
>
> You can use ~ here.  Just don't quote it.  It shouldn't be quoted.
>
> export PATH=~/bin:"${PATH}"

I'm sorry, but this isn't true, even for bash.  It still leaves the "~" in
the PATH, which confuses "which" (although "type", being a bash builtin,
recognizes and expands it).  The "~" is not expanded when used in a
variable assignment (whether quoted or unquoted), even if 'echo' expands
it.  Oh, and your suggestion definitely won't work for sh, which also uses
/etc/profile.  IMO, any shell-specific code in /etc/profile should go into
the shell-specific section of /etc/profile, and the rest of it should be
Bourne shell compatible.

> > # Set MANPATH so it includes users' private man if it exists
> > # if [ -d ~/man ]; then
> >-#   MANPATH="~/man:${MANPATH}"
> >+#   MANPATH="${HOME}/man:${MANPATH}"
> > # fi
> >
> > # Set INFOPATH so it includes users' private info if it exists
> > # if [ -d ~/info ]; then
> >-#   INFOPATH="~/info:${INFOPATH}"
> >+#   INFOPATH="${HOME}/info:${INFOPATH}"
> > # fi
>
> I don't know if man or info deal properly with ~ but neither of the
> above should cause a problem for which.

Neither man nor info does any ~-expansion, AFAICS.
	Igor
-- 
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     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
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whatever you think is worth doing."  -- Dr. Jubal Harshaw

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